JP5017390B2 - Resource management apparatus and resource management method - Google Patents

Description

  The present invention relates to a call processing with resource management such as a bandwidth amount on a transfer path in response to a request for bandwidth reservation and bandwidth reservation in a transfer network using an IMS (IP Multimedia Subsystem) for realizing a multimedia service. The present invention relates to a resource management apparatus and a resource management method for implementing the above.

  When voice communication or video communication is started between terminals, the terminals establish a SIP session between the terminals by SIP (Session Initiation Protocol) negotiation via a call processing server. The SIP negotiation is determined by transmitting / receiving a SIP SDP (Session Description Protocol) description between terminals. The media information included in the SDP includes a required bandwidth, a transfer quality class, and the like. RACS (Resource and Admission Control Subsystem) manages the route information of the transfer network and the bandwidth of each link in advance as a virtual path that is a virtual resource.

  In order to prevent packet loss due to interference between one or more media traffic established by SIP negotiation when passing through the transport network, RACS determines the bandwidth required for the media session determined based on the SIP negotiation result as a transfer quality class. And, according to the direction attribute, addition / subtraction is performed from the virtual path band as the used band. When it is determined that the bandwidth can be used within the upper limit bandwidth of the virtual path, the termination is created in the media gateway (MG), and pinhole control and policy setting are performed.

  The call processing server (SIP server) identifies a calling user type, a called user type, a priority in the SDP in SIP, and the like, and provides a reservation function for a fixed number of calls for a call with high priority.

  Here, among RACS, a functional unit having an A-RACF (Resource and Admission Control Function) and an SPDF (Service Policy Decision Function) is an MGC (Media Gateway Controller). Also, a transfer processing device that is a controlled function unit such as C-BGF (Core Border Gateway Function), I-BGF (Interconnection Border Gateway Function), and RCEF (Resource Control Enforcement Function), and transfers IP packets in a transfer network. Is the media gateway.

  Conventionally, connection is not possible when the number of SIP sessions of each priority of a call negotiated between terminals exceeds the priority threshold set in the call processing server. If the call processing server determines that the connection is possible, it issues a bandwidth reservation request and a bandwidth reservation request to the resource management function unit, and corresponds to a path between terminals in each virtual path managed by the resource management function unit When it is possible to use the remaining amount of each link resource, it is determined that connection is possible.

  Here, the concept of conventional media session resource management will be described with reference to FIG.

  (A) In step S401, the call processing server receives the initial INVITE (ini-invite) transmitted from the terminal. In step S402, the call processing server compares the number of SIP sessions included in the initial INVITE (ini-invite) with a preset threshold number of sessions.

  (B) If the number of SIP sessions does not exceed the threshold of the priority session number, in step S403, the call processing server determines the requested bandwidth included in the initial INVITE (ini-invite) and the remaining bandwidth amount in the L2SW virtual path Compare

  (C) If the requested bandwidth does not exceed the remaining bandwidth, in step S404, the requested bandwidth included in the initial INVITE (ini-invite) is compared with the remaining bandwidth in the SBC virtual path. If the requested bandwidth does not exceed the remaining bandwidth, the call processing server determines that the terminal can be connected.

  (D) If the number of SIP sessions exceeds the threshold number of priority sessions in step S402, if the requested bandwidth exceeds the remaining bandwidth in the L2SW virtual path in step S403, and if the requested bandwidth is the SBC virtual path in step S404 In step S405, the call processing server determines that the terminal cannot be connected.

JP 2003-258855 A

  A priority setting is provided to distinguish calls to be preferentially connected when congestion is restricted, where only general calls are restricted. In order to realize a mechanism for communicating, priority setting needs to be provided. Such a reservation function can be realized only by counting the number of calls in the conventional fixed telephone network.

  However, telephone calls with different bandwidth requirements depending on quality and networks that handle traffic of various bandwidths such as video calls that use a large amount of bandwidth for telephone calls, such as routers and switches In a network having a plurality of types of interfaces, the amount of available bandwidth resources is diversified. Therefore, there is a problem that it is difficult to manage and control the call transfer processing for the usable bandwidth only from the number of calls allowed by the system.

  As for call processing in networks where the amount of bandwidth resources that can be used is diversified in this way, not only the number of calls that the system allows for priority in the available bandwidth, but also the bandwidth amount of link resources that each system has There is a need to.

  In view of the above problems, the present invention accurately analyzes a resource such as a link band with respect to a requested band in an IMS that realizes a multimedia service by call processing control using SIP in an IP-based transfer network. An object of the present invention is to provide a resource management apparatus and a resource management method that control and appropriately implement call processing according to call priority.

  Here, the IMS is a call session control function (CSCF) that manages call processing, use bandwidth accumulation / decompression, acceptance determination, pinhole control for a media gateway of a transfer network, policy setting, and C- BGF, I-BGF, RCEF, etc. Note that “stacking / unloading” means adding the requested bandwidth to the corresponding one or more virtual paths at the start of communication after identifying the route between the terminals from all the virtual paths managed by the resource management device. It means that the added band is subtracted at the end of the call. “Pinhole control” means that the resource management device sets a port for enabling communication between terminals, and between terminals and a call processing server, with respect to the media gateway.

In order to solve the above-described problem, an aspect of the present invention provides a network relay that relays a plurality of call processing servers and IP packets through which a plurality of client terminals and a plurality of server terminals respectively establish communication by SIP negotiation. This device is located at the end of the transfer network managed by the device and call processing server, and has a transfer processing device that transfers IP packets to the terminal. The transfer processing device allows communication between terminals by permitting the inflow and outflow of IP packets. The present invention relates to a resource management apparatus that manages one or more functions of a call processing server and manages and controls a communication band and a communication path in a transfer network. That is, the resource management device according to the aspect of the present invention includes: (a) a reception unit that receives bandwidth reservation request information that is information related to a bandwidth reservation request that is transmitted when establishing communication by SIP negotiation; Stores bandwidth reservation request information including the number of media streams and the amount of bandwidth required for communication between terminals when receiving a bandwidth reservation request, and relates to communication bandwidth and communication path in the physical configuration of the transfer network between terminals. A storage unit that preliminarily stores information on the number of media streams and the amount of bandwidth that can be accepted as virtual path information , (c) each of the requested bandwidth amounts in a plurality of bandwidth securing requests based on the result of SIP negotiation, and a communication path The upper limit bandwidth amount and the remaining bandwidth amount of the virtual path set above are compared, and the required bandwidth amount included in the bandwidth reservation request information is Only if not exceeding the upper limit amount of bandwidth and the residual bandwidth amount, virtual path and determines the comparison determination unit to be acceptable bandwidth securing request, when it is determined that (d) comparing the determination unit can tolerate bandwidth reservation request, the terminal A setting unit that performs policy control and pinhole control for the transfer processing device, and (e) the required bandwidth amount included in the bandwidth reservation request information is virtual so that the bandwidth can be used based on the result of SIP negotiation between An alarm unit that issues an alarm when the upper limit bandwidth amount of the path is exceeded and when the remaining bandwidth amount of the virtual path is exceeded , and the virtual path information is set for each transport class and each service class. The reservation threshold indicating the size of the band and the priority among the plurality of bands, and each of the plurality of bands included in the virtual path information has a threshold related to the priority. And summarized in that constituting the virtual path to be assigned sequentially adjacent I.

Another aspect of the present invention is managed by a plurality of call processing servers through which a plurality of client terminals and a plurality of server terminals respectively establish communication by SIP negotiation, a network relay device that relays IP packets, and a call processing server. In a transfer network that has a transfer processing device that is located at the end of a transfer network that transfers IP packets to a terminal, and that allows the communication between terminals by allowing the transfer processing device to allow inflow and outflow of IP packets. The present invention relates to a resource management method that assumes one or more functions of a call processing server and manages and controls a communication band and a communication path. That is, in the resource management method according to another aspect of the present invention, (a) the reception unit receives bandwidth reservation request information that is information related to a bandwidth reservation request that is transmitted when establishing communication by SIP negotiation; (B) When the accepting unit receives a bandwidth securing request, the storage unit stores bandwidth securing request information including the number of media streams and the amount of bandwidth required for communication between terminals, in the physical configuration of the transfer network A step of preliminarily storing, as virtual path information , information on the number of media streams and the amount of bandwidth that can be communicated between terminals with respect to a communication band and a communication path; and (c) a plurality of comparison determination units based on a result of SIP negotiation. Compare each requested bandwidth amount in the bandwidth reservation request with the upper limit bandwidth amount and remaining bandwidth amount of the virtual path set on the communication path, Required amount of bandwidth frequency allocation request information is included in only if not exceeding the upper limit amount of bandwidth and the residual bandwidth of the virtual path, virtual path determining that an acceptable bandwidth securing request, the setting section (d), comparative Performing a policy control and a pinhole control on the transfer processing device so that the bandwidth can be used based on the result of the SIP negotiation between the terminals when the determination unit determines that the bandwidth securing request can be permitted; e) an alarm unit, required amount of bandwidth the bandwidth allocation request information is included in, see contains a step of issuing an alarm upon exceeding the remaining amount of bandwidth when and virtual path has exceeded the upper limit bandwidth of the virtual path, virtual The path information is set for each transport class and each service class, and includes the type of band, a reservation threshold indicating the band size, and the priority among a plurality of bands. A plurality of bands including the each have a threshold for priority is summarized in that configuring the virtual path to be assigned sequentially adjacent in accordance with the priorities.

  According to the present invention, in an IMS that realizes a multimedia service by call processing control using SIP in an IP-based transfer network, resources such as a link band are accurately analyzed and controlled with respect to a requested band. It is possible to provide a resource management device and a resource management method that appropriately implement call processing according to call priority.

  That is, as for the number of calls, even when the processing capacity of the call processing server is not exceeded, even when the resource shortage is determined by correctly determining the shortage of resources when one link bandwidth of the network is regarded as a resource, An environment where it is possible to secure the necessary bandwidth for priority calls and not only traffic that uses a uniform bandwidth such as voice calls but also traffic such as video calls with different bandwidth requirements increases. It is possible to secure a certain priority telephone communication.

It is a block diagram of the resource management apparatus which concerns on the 1st Embodiment of this invention. It is a schematic diagram of the apparatus structure in the transfer type | system | group network which concerns on the 1st and 2nd embodiment of this invention. It is the schematic of the communication resource which virtualized the communication path | route which concerns on the 1st and 2nd embodiment of this invention. It is a schematic diagram regarding the priority of the call which concerns on the 1st and 2nd embodiment of this invention. It is a schematic diagram regarding the resource management method which concerns on the 1st and 2nd embodiment of this invention. It is a flowchart figure regarding the resource management method which concerns on the 1st and 2nd embodiment of this invention. It is a flowchart figure regarding the resource management method which concerns on the 1st and 2nd embodiment of this invention. It is a flowchart figure regarding the resource management method which concerns on the 1st and 2nd embodiment of this invention. It is a schematic diagram which shows the logic of the alarm issuing which concerns on the 1st and 2nd embodiment of this invention. It is a schematic diagram which shows the logic of the alarm issuing which concerns on the 1st and 2nd embodiment of this invention. It is a schematic diagram which shows the logic of the alarm issuing which concerns on the 1st and 2nd embodiment of this invention. It is a schematic diagram which shows the logic of the alarm issuing which concerns on the 1st and 2nd embodiment of this invention. It is a schematic diagram which shows the logic of the alarm issuing which concerns on the 1st and 2nd embodiment of this invention. It is a schematic diagram which shows the logic of the alarm issuing which concerns on the 1st and 2nd embodiment of this invention. It is a schematic diagram which shows the logic of the alarm issuing which concerns on the 1st and 2nd embodiment of this invention. It is a schematic diagram which shows the logic of the alarm issuing which concerns on the 1st and 2nd embodiment of this invention. It is a block diagram of the resource management apparatus which concerns on the 2nd Embodiment of this invention. It is a schematic diagram which shows the operation | movement of the alarm issuing at the time of reservation threshold change concerning the 2nd Embodiment of this invention. It is a schematic diagram which shows the logic of the alarm issuing at the time of the band control which concerns on the 2nd Embodiment of this invention. It is a schematic diagram which shows the logic of the alarm issuing at the time of the band control which concerns on the 2nd Embodiment of this invention. It is a flowchart figure which shows the process regarding the resource management in the conventional call processing server.

  Next, embodiments of the present invention will be described with reference to the drawings. In the following description of the drawings, the same or similar parts are denoted by the same or similar reference numerals. However, it should be noted that the drawings are schematic and the configuration of the apparatus and system is different from the actual one. Therefore, a specific configuration should be determined in consideration of the following description. In addition, it is a matter of course that portions having different configurations are included between the drawings.

  The following embodiments of the present invention exemplify apparatuses and methods for embodying the technical idea of the present invention, and the technical idea of the present invention is the material and shape of the component parts. The structure, arrangement, etc. are not specified as follows. The technical idea of the present invention can be variously modified within the technical scope described in the claims.

(First embodiment)
[Device configuration]
As shown in FIG. 1, the resource management apparatus 11 according to the first embodiment of the present invention includes a plurality of client terminals 300 and a plurality of server terminals 300 through which a plurality of client terminals 300 and a plurality of server terminals 300 pass to establish communication through SIP negotiation. The call processing server 100 includes a network relay device that relays IP packets, a transfer processing device 500 that is located at the end of a transfer network managed by the call processing server 100 and transfers IP packets to the terminal 300, and the transfer processing device 500 In a transfer network that enables communication between terminals 300 by permitting inflow and outflow of IP packets, the network handles one or more of the functions of the call processing server 100, and manages and controls communication bands and communication paths. That is, the resource management device 11 receives the bandwidth securing request information that is information related to the bandwidth securing request that is transmitted when establishing communication by SIP negotiation, and when the accepting unit 101 receives the bandwidth securing request. , Which stores bandwidth securing request information including the number of media streams and the amount of bandwidth required for communication between terminals 300, and allows communication between terminals 300 with respect to the communication bandwidth and communication path in the physical configuration of the transfer network. Storage unit 102 that pre-stores information on the number of streams and the amount of bandwidth as virtual path information, each requested bandwidth amount in a plurality of bandwidth reservation requests based on the result of SIP negotiation, and the upper limit of the virtual path set on the communication path The bandwidth amount and the remaining bandwidth amount are compared, and the required bandwidth amount included in the bandwidth reservation request information is Only when the upper limit bandwidth and the remaining bandwidth of the virtual path are not exceeded, the comparison determination unit 103 that determines that the virtual path can accept the bandwidth reservation request and the comparison determination unit 103 determines that the bandwidth reservation request can be accepted. The setting unit 104 that performs policy control and pinhole control for the transfer processing device 500 and the required bandwidth amount included in the bandwidth reservation request information are set to the upper limit of the virtual path so that the bandwidth use based on the SIP negotiation result is possible. And an alarm unit 105 that issues an alarm when the bandwidth is exceeded and when the remaining bandwidth of the virtual path is exceeded. Here, the virtual path information is set for each transport class and for each service class, and includes a type of band, a reservation threshold indicating the size of the band, and priorities among a plurality of bands, and a plurality of bands included in the virtual path information. Each have a threshold value relating to priority, and are allocated adjacently in order according to the priority, thereby forming a virtual path.

  The accepting unit 101 acquires a bandwidth reservation request (AAR) based on the result of SIP negotiation from the call processing function unit 10. The bandwidth securing request includes information (hereinafter referred to as “bandwidth securing request information”) such as a bandwidth amount, a transfer quality class, and a direction attribute necessary for a media session between client terminals or between a client terminal and a server terminal.

  The storage unit 102 stores in advance, as virtual path information, route information that is a physical configuration of a transfer network on which the call processing server 100 performs call processing. The virtual path information stored in the storage unit 102 mainly includes a virtual path identifier, an upper limit bandwidth, and a used bandwidth. The storage unit 102 stores in advance, as facility information, the type of bandwidth related to the virtual path, the size of the bandwidth (reservation threshold), and the like for each transport class and each service class.

  The storage unit 102 stores a virtual path in advance for each physical link. When the processing capability of the resource management apparatus 11 becomes a bottleneck with respect to the physical link, a virtual path set for the physical link is used. Further, when a plurality of physical links virtually become one physical link as in link aggregation, each virtual path set by the plurality of physical links is handled as one virtual path.

  Next, the storage unit 102 stores bandwidth reservation request information according to the bandwidth reservation request received by the receiving unit 102. The bandwidth reservation request information includes the amount of bandwidth required for a media session between client terminals or between a client terminal and a server terminal, a transfer quality class and a direction attribute, a subscriber priority, or a bandwidth reservation request priority.

  The comparison determination unit 103 first compares the number of media streams included in the bandwidth reservation request information with the number of media streams included in preset virtual path information, and then the bandwidth amount and virtual path information included in the bandwidth reservation request information. Is compared with the reservation threshold included. Further, when determining the amount of bandwidth necessary for communication between terminals, the comparison / determination unit 103 sequentially compares a plurality of bands constituting the virtual path information, starting from a band with a lower priority. Furthermore, when comparing and determining the amount of bandwidth necessary for communication between the terminals 300 with the reservation threshold value included in the virtual path information, the comparison determination unit 103 sequentially compares the bandwidths having a lower priority among a plurality of bands constituting the virtual path. To do. Furthermore, the comparison / determination unit 103 compares the amount of bandwidth required for communication between the terminals 300 with the upper limit amount of bandwidth in the first bandwidth, which is the lowest priority bandwidth among the plurality of bandwidths constituting the virtual path. If the bandwidth required for communication between the terminals 300 already exceeds the upper limit bandwidth in the first bandwidth, the upper limit bandwidth in the second bandwidth having the second lowest priority after the first bandwidth In comparison, if the bandwidth required for communication between the terminals 300 has not yet exceeded the upper limit bandwidth in the first bandwidth, the total obtained by adding the bandwidth required for communication between the terminals to the existing bandwidth used Are compared with the upper limit bandwidth in the first bandwidth. In addition, when the comparison determination unit 103 compares the total bandwidth amount obtained by adding the bandwidth amount necessary for communication between terminals to the existing bandwidth amount and the upper limit bandwidth amount in the first band, the total bandwidth amount is When the upper limit bandwidth amount in the first band is exceeded and the priority of the band included in the band securing request information is the same as that in the first band, the alarm unit 105 issues an alarm specialized for the first band, The comparison determination unit 103 determines to reject the bandwidth securing request, the total bandwidth exceeds the upper limit bandwidth in the first bandwidth, and the bandwidth priority included in the bandwidth securing request information is the first bandwidth. If they are different, the alarm unit 105 issues an alarm specialized for the first band, and the comparison / determination unit 103 compares the total band amount with the upper limit band amount in the second band. The bandwidth securing request information and virtual path information stored in the storage unit 102 are managed as communication resources, and the comparison / determination unit 103 determines the number of media streams that can be communicated between the terminals 300 and the physical link bandwidth between the terminals 300. The reservation threshold and the availability of bandwidth are compared and determined in the order of the link virtual path virtualized using communication resources and the processing virtual path virtualized using the processing capability between terminals 300 as communication resources.

  That is, the comparison / determination unit 103 compares the virtual path information stored in the storage unit 102 with the band securing request information and the like based on the accumulation determination policy, and determines whether the requested band is acceptable. In addition, the reserved bandwidth is compared with the reserved bandwidth, which is the bandwidth already used, the new bandwidth obtained by adding the required bandwidth to the accumulated bandwidth, and whether or not the alarm is issued based on the alarm judgment policy. judge. The comparison determination unit 103 requests bandwidth allocation in the order of the number of media streams that can be received by the resource managed by the resource management device 11, the virtual path obtained by converting the link between nodes into a virtual resource, and the virtual path obtained by converting the processing capability of the node into a virtual resource. The information is compared with each reservation threshold value. The details of the stacking determination policy and the alarm determination policy will be described later. When any band on the route is unusable, the admission determination is NG, and the call processing server 11 ends the SIP negotiation.

  The setting unit 104 performs policy control and pinhole control in order to secure the required bandwidth based on the determination result of the comparison determination unit 103. That is, the setting unit 104 can use the bandwidth in all the virtual paths in the comparison determination unit 103, and if the reception determination is OK, the setting unit 104 calculates the average rate value and the burst value based on the media information, and calculates the media. Set to the gateway.

  The alarm unit 105 issues an alarm based on the comparison determination result of the comparison determination unit 103.

  Next, FIG. 2 schematically shows a device configuration in the transfer network according to the first embodiment of the present invention. This communication network includes a plurality of user terminals 300 used by a user, a plurality of call processing servers 100 that control call connection requests transmitted from the user terminals 300, and a transfer network based on requests from the call processing server 100. A media gateway 500 that links internal and external terminations, and a plurality of routers (including a switch concept) 200 that connect the user terminal 300, the call processing server 100, and the media gateway 500 so that they can communicate with each other.

  When a call to the other user is desired, an SIP signal required for establishing a call connection such as INVITE is transmitted from the user terminal 300 to another user terminal (not shown), and SIP with the other user terminal is transmitted. If the result of the negotiation is OK, a session is established between the user terminals, and a call can be made. Specifically, the SIP signal from the user terminal 300 is transmitted to the call processing server 100a, and the call processing server 100a that has received the SIP signal receives another call processing server 100b connected in the vicinity or further. The call request is made to the other user terminal via the call processing server 100c. When the user who owns the user terminal responds to the connection request, a response signal to the SIP signal is transmitted to the user terminal 300 via the call processing server 100c, the call processing server 100b, and the call processing server 100a. Is done. Thereafter, a session of media such as voice is established between the user terminal 300 and another user terminal.

  In this way, the user terminal 300 can communicate with a user terminal (not shown), and communicate between the user terminal 300a and the user terminal 300b (or the user terminal 300c to the user terminal 300e). It is also possible to do this. Further, each of the user terminals 300a to 300e can communicate with a plurality of other user terminals (not shown). Note that the dotted line shown in FIG. 2 explains the flow of the SIP signal, but in actuality, it is transmitted and received through the solid line. The call processing server 100c is connected to a plurality of other transfer networks, and can exchange SIP signals with the opposite call processing server connected to each transfer network.

  Here, the result of the SIP negotiation is described in the SDP, and the media information included in the SDP includes a media type, a requested bandwidth, a direction attribute, a transfer quality class, and the like. As shown in FIG. 1, the call processing server 100 includes a call processing function unit 10 that performs call processing such as the SIP signal, and a resource management device 11 that controls the media gateway 500 based on a request from the call processing function unit 10. It consists of.

  The call processing function unit 10 determines a transfer quality class and the like from the media type and direction attribute of the media information described above, and requests the resource management device 11 for a bandwidth control request (AAR (authentication and / or bandwidth reservation and bandwidth reservation). authorization request), a request to control the bandwidth of signals, etc.). On the other hand, the resource management device 11 manages the route information of the transfer network and the bandwidth of each link as virtual resources and virtual paths, and secures the necessary bandwidth for the media determined by the bandwidth control request in the transfer network. If the bandwidth can be used in the virtual path, pinhole control and policy setting are performed on the media gateway 500 to reserve and secure the bandwidth. Thereafter, the media gateway 500 newly adds, changes, or deletes a termination pair based on a request from the call processing server 100. Note that the alternate long and short dash line shown in FIG. 2 indicates the flow of such pinhole control.

  A resource management method will be described with reference to FIG.

  The resource management apparatus 11 stores and manages the physical configuration of the transfer network as a virtual path in the storage unit 102. The information to be managed is mainly the identifier, upper limit band and used band of each virtual path. The virtual path manages the upper limit of the link bandwidth between the nodes (terminals) (if there are uplinks and downlinks), and further, the bottleneck in the node and the restriction on the service type like the L2SW virtual path for distribution service It is possible to set and manage, as a virtual path, a band to be used, for example, a contracted band between providers in the distribution company and the distribution capability of the server terminal. Here, the transfer processing capacity of a node converts packets / second into a bandwidth. In addition, it is possible to store and manage the contract upper limit bandwidth of the user (subscriber) and the upper limit bandwidth of the service to be enjoyed as an access line virtual path. Further, it is possible to store subscriber information such as information on additional services to be contracted and subscriber priority. When the subscriber information is set, the SIP gateway, SIP signal policy setting, and pinhole control are implemented for the media gateway.

  Communication between terminals is started by SIP negotiation. Whether or not this SIP signal is passed through the media gateway is determined by storing and managing the subscriber information and SIP port information, and setting the status in the media gateway by INS. Decide whether or not. That is, a media gateway controller (MGC) holds the status at the time of pinhole control in INS. Thereafter, the media used for communication between the terminals is determined according to the SDP determined when SIP negotiation is started. The media to be used is determined by adding, for example, media 1 and media 2 shown in FIG. The medium includes information such as a voice codec type G711, bidirectional communication, and a bandwidth amount of 64 Kbps. It is determined in turn from the contract upper limit such as the access line virtual path and the service provision upper limit whether or not this media band can be used.

  That is, as shown in FIG. 3, it is determined whether or not the media bandwidth can be used in the access line virtual path 1 (upper limit bandwidth 100 Mbps, used bandwidth 40 Mbps). It is determined whether or not it can be used. If the PON virtual path 1 (upper limit bandwidth 1 Gbps, use bandwidth 60 Mbps) can also be used, it is determined whether or not the L2SW virtual path (upper limit bandwidth 1 Gbps, use bandwidth 90 Mbps) can be used. In this way, it is determined whether or not the media bandwidth can be used even in the L2SW virtual path (for distribution service) (upper limit bandwidth 800 Mbps, used bandwidth 90 Mbps) and the media gateway virtual path (upper limit bandwidth 1 Gbps, used bandwidth 160 Mbps). Then, a communication path is secured sequentially according to the determination result. The arrows shown in FIG. 3 represent cases in which it is sequentially determined that a hatched virtual path can be used in each of the access line virtual path 1, the PON virtual path 1, and the L2SW virtual path. Further, as shown in FIG. 3, it can be seen that the hatched virtual path can be used in each of the L2SW virtual path, the L2SW virtual path (for distribution service), and the media gateway virtual path.

  When any band on the route is unusable, the acceptance determination is NG, and the SIP negotiation from the call processing server 100 is terminated. If the bandwidth can be used in all the virtual paths and the acceptance determination is OK, the media gateway calculates the average rate value and the burst value based on the media information determined by the SDP stored in the storage unit 102. Set to. If the media gateway setting is NG, the band determination is NG, and the SIP negotiation is terminated.

  Next, information transmitted and received between the call processing function unit 10 and the resource management apparatus 11 will be described with reference to FIG.

  During the bandwidth reservation and bandwidth reservation request from the call processing management function unit 10 to the resource management device 11, the information determined by the SIP negotiation between the terminals and the subscriber identifier that can identify the subscription unit that requested the media are included in the SDP. Send or receive one or more media information. The media information includes a service type (codec type), a required bandwidth, a transfer quality class, a direction attribute, and the like.

  The resource management device 11 stores and analyzes the request content from the call processing function unit 10 in the storage unit 102, and determines a transport class and a service class for each of the band for stacking and loading and the band for controlling the media gateway. To do. Furthermore, the resource management device 11 calculates the usable bandwidth amount for the stacking and unloading bandwidths, and calculates the burst threshold and the average rate for media gateway control. Furthermore, the resource management apparatus 11 determines whether or not the requested bandwidth amount can be used in order from the resource on the terminal side for the resource of the corresponding class of the virtual path on the route between the terminals among the managed resources.

  If the requested bandwidth amount for bandwidth reservation and bandwidth reservation can be stacked and loaded, it is determined that it can be accepted, media gateway control is performed, and policy control is performed to determine the calculated burst threshold, average rate, and packet behavior To do. The resource management apparatus 11 saves the control content of the media gateway in the storage unit 102 in association with the request from the call processing function unit 10 with the success response from the media gateway, and succeeds for the call processing function unit 10 as well. Return the response. As a result, the SIP negotiation between terminals is completed (200 OK for ini-invite), and IP packets can be transmitted and received between terminals at a desired bandwidth speed.

  In particular, as shown in FIG. 4, identification of call priority, emergency call, and the like is performed between the call processing function unit 10 and the resource management device 11 as a Reservation-Priority using code points (0 to 4). . An abbreviation character string stored in association with each other is used as an identifier for bandwidth management or media gateway setting (Megaco setting). As shown in FIG. 4 (a), for the Megaco settings for call types GN (general), UR (priority), UR1 (high priority) and emergency call (highest priority), respectively, GN, UR, UR1 and Used like UR1. When an undefined value is set for the use, the resource management apparatus 11 side returns an error response as an invalid value as shown in FIG. As shown in FIG. 4B, 500 (cause 38) is returned as an error response on the SIP. A 5004 invalid value is returned from the resource management apparatus 11 to the call processing function unit 10.

[Resource management method]
<Stacking judgment policy>
First, the accumulation determination policy will be described with reference to FIG.

  As illustrated in FIG. 5, the storage unit 102 stores information on the upper limit band of each virtual path, the upper limit band of the transport class, and the upper limit band of the service class secured in each upper limit band. The service class is a resource indicating a service application, and corresponds to “voice communication” and “multimedia communication” shown in FIG. In particular, the upper limit band related to voice communication is classified into an emergency band, a UR1 band, a UR band, and a GN band, and (1) the highest priority threshold, (2) the high priority threshold, (3) the priority threshold, and (4), respectively. The storage unit 102 stores the general threshold value.

  FIG. 5 is a diagram in which a threshold for each priority such as an emergency band is set for a service class related to voice communication in the transport class in the virtual path upper limit band. For the service class “multimedia communication”, only the upper limit band of the service class is set without setting a threshold for each priority such as the emergency band. Note that the virtual path upper limit bandwidth shown in FIG. 5 matches the upper limit of the virtual path in the SBC virtual path, and matches the upper limit of the transport class for the L2SW virtual path. In the virtual path upper limit band in which the threshold value as shown in FIG. 5 is set, the stacking determination policy executed by the comparison determination unit 103 is defined as follows in response to the band securing request (AAR).

(I) When the request type from the call processing function unit 10 to the resource management apparatus 11 is the service type “multimedia communication”: AAR (multimedia communication)
(A) Exceeding the “SRV_Multimedia upper limit band”, regardless of the size of the “stacked band”. (A) When “stacked bandwidth” + “AAR (multimedia communication)” exceeds “SRV_Multimedia upper limit bandwidth”, an alarm is always output.

  Note that the “accumulated bandwidth” refers to “already accumulated bandwidth” + “new requested bandwidth”. Therefore, the threshold value and the accumulated bandwidth are compared, and if the “accumulated bandwidth” is larger, it is impossible to accumulate the “new requested bandwidth”. Further, since the comparison with the “SRV_Multimedia upper limit band” is performed regardless of the size of the “stacked band”, if the “stacked band” has already exceeded the “SRV_Multimedia upper limit band”, AAR (multimedia communication) The alarm is output even when) is received.

(II) When the request type from the call processing function unit 10 to the resource management apparatus 11 is the service type “voice communication”: AAR (voice communication)
(A) “SRV_Multimedia upper limit bandwidth” is not checked. (B) Call priority in the order of “(4) general threshold”, “(3) priority threshold”, “(2) high priority threshold”, “(1) highest priority threshold” regardless of the size of the accumulated bandwidth The stacking judgment is performed up to the threshold that can be stacked. (C) If the “stacked bandwidth” has already exceeded the threshold value, an alarm for exceeding the threshold value is not output. (D) “Stacked bandwidth” + “AAR (voice communication)” is “(1) highest priority threshold”, “(2) high priority threshold”, “(3) priority threshold” and “(4) general threshold”. When exceeding each, an alarm corresponding to each threshold is output.

<Alarm judgment policy>
Next, the alarm determination policy will be described with reference to FIG.

  (A) An alarm is always output when each threshold is exceeded. (A) The threshold value that is determined to be exceeded in AAR (multimedia communication) and AAR (voice communication) is stored in the storage unit 102 separately. (C) If the newly accumulated bandwidth matches each threshold, it is determined that the threshold has not been exceeded, and no alarm is output. (D) The policy regarding the comparison with the threshold value in the number of media streams is also the same as the policy regarding the bandwidth.

  Note that “audio communication” and “multimedia communication” indicate the type of media, “audio communication” for audio, and “multimedia communication” for images other than audio. Therefore, AAR (voice communication) indicates band information of audio media, and AAR (multimedia communication) indicates band information of media such as video. Also, for example, when the “stacked bandwidth” is up to the high priority threshold and an AAR (voice communication) having a bandwidth below the general level is received, no alarm is output due to call loss. This is because the band accumulation determination in this case is performed based on comparison with “(4) general threshold”.

<Alarm output logic (voice communication)>
Next, an alarm output logic based on the above-described stack determination policy and alarm determination policy in voice communication will be described with reference to the flowchart of FIG.

<< Alarm output logic related to the number of media streams >>
(A) In step S100, the accepting unit 101 acquires a bandwidth securing request related to voice communication based on the result of SIP negotiation, that is, AAR (voice communication), from the call processing function unit 10. In step S101, the comparison determination unit 103 determines whether the number of existing stacked streams related to the number of media streams exceeds a set threshold value. If not, in step S102, the comparison / determination unit 103 adds the new request stream number included in the bandwidth reservation request information acquired by the reception unit 101 in step S100 to the existing number of stacked streams, and is the total number of streams. However, it is determined whether or not the respective thresholds set in the voice communication service class, that is, the general threshold value, the priority threshold value, the high priority threshold value, and the highest priority threshold value are exceeded.

  (B) When the total number of streams exceeds any one of the general threshold, the priority threshold, the high priority threshold, and the highest priority threshold, the alarm unit 105 outputs an alarm in step S103. Subsequently, in step S104, the comparison / determination unit 103 determines whether connection is possible in a state where the total number of streams exceeds the threshold. That is, when the bandwidth reservation request has a priority of “general”, if the total number of streams exceeds the threshold of the priority “general” set in the virtual path of the number of media streams, connection is not possible and SIP negotiation is terminated. .

  (C) When the priority of the bandwidth securing request does not exceed the priority threshold set in the virtual path, threshold comparison regarding the bandwidth of the S2SW virtual path is performed. If the number of existing stacked streams exceeds the threshold value in step S101, the process proceeds to step S104 if the total number of streams does not exceed the threshold value in step S102, and the comparison determination unit 103 can connect a bandwidth securing request. It is determined whether or not.

<< Alarm Output Logic for L2SW Virtual Path >>
(D) In step S105, the comparison / determination unit 103 determines whether the existing accumulated bandwidth exceeds the threshold set in the S2SW virtual path. If not exceeded, in step S106, the comparison / determination unit 103 determines that the total bandwidth amount, which is the sum of the existing accumulated bandwidth amount and the new bandwidth amount included in the bandwidth reservation request information acquired by the reception unit 101 in step S100, is obtained. It is determined whether or not each threshold value set in the voice communication service class, that is, each threshold value is exceeded in the order of general, priority, high priority, and highest priority.

  (E) If the total bandwidth exceeds one of the general, priority, high priority, and top priority thresholds, the alarm unit 105 outputs an alarm in step S107. In step S108, the comparison / determination unit 103 determines whether or not connection is possible in a state where the total bandwidth exceeds the threshold. That is, when the bandwidth securing request has a priority of “general”, if the total bandwidth exceeds the threshold of the priority “general” set in the L2SW virtual path, connection is not possible and the SIP negotiation is terminated.

  (F) When the priority of the bandwidth securing request does not exceed the priority threshold set in the L2SW virtual path, threshold comparison regarding the bandwidth of the SBC virtual path is performed. If the existing accumulated bandwidth exceeds the threshold in step S105, the process proceeds to step S108 if the total bandwidth does not exceed the threshold in step S106, and the comparison determination unit 103 can connect the bandwidth securing request. It is determined whether or not.

<< Alarm output logic related to SBC virtual path >>
(G) In step S109, the comparison / determination unit 103 determines whether the existing accumulated bandwidth exceeds the threshold set in the SBC virtual path. If not exceeded, in step S110, the comparison / determination unit 103 determines that the total bandwidth amount, which is the sum of the existing accumulated bandwidth amount and the new bandwidth amount included in the bandwidth reservation request information acquired by the reception unit 101 in step S100, is obtained. It is determined whether or not each threshold value set in the voice communication service class, that is, each threshold value is exceeded in the order of general, priority, high priority, and highest priority.

  (H) If the total bandwidth exceeds one of the general, priority, high priority, and top priority thresholds, the alarm unit 105 outputs an alarm in step S111. Subsequently, in step S112, the comparison determination unit 103 determines whether or not connection is possible in a state where the total bandwidth exceeds the threshold. That is, when the bandwidth securing request has a priority of “general”, if the total bandwidth exceeds the threshold of the priority “general” set in the L2SW virtual path, connection is not possible and the SIP negotiation is terminated.

  (R) If the priority of the bandwidth securing request does not exceed the priority threshold set in the SBC virtual path, the SIP negotiation is successful and communication is established. If the existing accumulated bandwidth exceeds the threshold in step S109, the process proceeds to step S112 if the total bandwidth does not exceed the threshold in step S110, and the comparison determination unit 103 can connect the bandwidth securing request. It is determined whether or not.

  Next, alarm output logic at general, priority, high priority, and highest priority in the L2SW virtual path will be described with reference to the flowchart of FIG. Note that the L2SW virtual path determination is repeated twice in the order of “up” to “down”. In the case of “upstream” and capture NG, “downlink” determination processing is not performed. Here, “uplink” indicates a communication direction of a signal entering the transfer network from the terminal, and “downlink” indicates a communication direction of a signal output from the transfer network to the terminal.

  (A) In step S201, the comparison / determination unit 103 determines whether the existing “stacked bandwidth” has already exceeded the threshold value of the priority “general”. If not, in step S202, the comparison determination unit 103 determines whether the total bandwidth amount obtained by adding the new bandwidth amount included in the bandwidth reservation request information to the existing “stacked bandwidth” exceeds the threshold value regarding the bandwidth of the priority “general”. Determine whether or not. If exceeded, in step S203, the alarm unit 105 outputs an alarm corresponding to the priority “general”.

  (B) Subsequently, the comparison / determination unit 103 analyzes the priority of the bandwidth reservation request information, and ends the SIP negotiation if the priority is “general”. In step S204, if the priority is any of “priority”, “high priority”, and “highest priority”, the process proceeds to step S205. In step S201, if the existing “stacked bandwidth” has already exceeded the bandwidth threshold of the priority “general”, the process proceeds to step S204. If the total bandwidth does not exceed the priority “general” in step S202, the process proceeds to SBC virtual path determination after step S108 shown in FIG.

  (C) In step S205, the comparison / determination unit 103 determines whether the existing “stacked bandwidth” has already exceeded the threshold of the priority “priority”. If not, in step S206, the comparison / determination unit 103 determines whether the total bandwidth amount obtained by adding the new bandwidth amount included in the bandwidth reservation request information to the existing “stacked bandwidth” exceeds the threshold value regarding the priority “priority” bandwidth. Determine whether or not. If exceeded, the alarm unit 105 outputs an alarm corresponding to the priority “priority” in step S207.

  (D) Subsequently, the comparison / determination unit 103 analyzes the priority of the bandwidth reservation request information, and ends the SIP negotiation if the priority is “priority”. If the priority is “high priority” or “highest priority” in step S208, the process proceeds to step S209. In step S205, if the existing “stacked bandwidth” has already exceeded the bandwidth threshold of the priority “priority”, the process proceeds to step S208. If the total bandwidth does not exceed the priority “priority” in step S206, the process proceeds to SBC virtual path determination after step S108 shown in FIG.

  (E) In step S209, the comparison / determination unit 103 determines whether the existing “stacked bandwidth” has already exceeded the threshold of the priority “high priority”. If not, in step S210, the comparison / determination unit 103 determines that the total bandwidth amount obtained by adding the new bandwidth amount included in the bandwidth reservation request information to the existing “stacked bandwidth” exceeds the threshold value regarding the bandwidth with the priority “high priority”. It is determined whether or not. If exceeded, in step S211, the alarm unit 105 outputs an alarm corresponding to the priority “high priority”.

  (F) Subsequently, the comparison / determination unit 103 analyzes the priority of the bandwidth reservation request information. If the priority is “high priority”, the SIP negotiation is terminated. If the priority is “highest priority” in step S212, the process proceeds to step S213. In step S209, if the existing “stacked bandwidth” has already exceeded the bandwidth threshold of the priority “high priority”, the process proceeds to step S212. If the total bandwidth does not exceed the priority “high priority” in step S210, the process proceeds to SBC virtual path determination after step S108 shown in FIG.

  (G) In step S213, the comparison / determination unit 103 determines whether or not the total bandwidth amount obtained by adding the new bandwidth amount included in the bandwidth reservation request information to the existing “stacked bandwidth” exceeds the threshold value regarding the bandwidth having the priority “highest priority”. Determine whether. If exceeded, in step S214, the alarm unit 105 outputs an alarm corresponding to the error response based on FIG. 4B, and ends the SIP negotiation. If the total bandwidth does not exceed the priority “highest priority” in step S213, the process proceeds to SBC virtual path determination in step S108 and subsequent steps shown in FIG.

<Alarm output logic (multimedia communication)>
Next, alarm output logic based on the above-described stack determination policy and alarm determination policy in multimedia communication will be described with reference to the flowchart of FIG.

<< Alarm output logic related to the number of media streams >>
(A) In step S300, the accepting unit 101 acquires a bandwidth securing request for multimedia communication based on the result of SIP negotiation, that is, AAR (multimedia communication) from the call processing function unit 10. In step S301, the comparison determination unit 103 determines that the total number of streams, which is the sum of the number of existing stacked streams and the number of new request streams included in the bandwidth reservation request information acquired by the reception unit 101 in step S300, is the multimedia communication. It is determined whether or not the upper limit of the threshold set in the service class is exceeded.

  (B) If the total number of streams exceeds the upper limit of the threshold value, the alarm unit 105 outputs an alarm in step S302 and ends the SIP negotiation. If the upper limit of the threshold is not exceeded in step S301, the process proceeds to step S303 for determining the bandwidth of the L2SW virtual path.

<< Alarm Output Logic for L2SW Virtual Path >>
(C) In step S303, the comparison / determination unit 103 determines that the total bandwidth amount that is the sum of the existing accumulated bandwidth amount and the new bandwidth amount included in the bandwidth reservation request information acquired by the reception unit 101 in step S300 is It is determined whether or not the upper limit of the threshold of the L2SW virtual path set in the media communication service class is exceeded. If the total bandwidth exceeds the upper limit of the threshold value, in step S304, the alarm unit 105 outputs an alarm and ends the SIP negotiation. If the total bandwidth does not exceed the upper limit of the threshold value in step S303, the process proceeds to step S305 for determining the bandwidth of the SBC virtual path.

<< Alarm output logic related to SBC virtual path >>
(D) In step S305, the comparison / determination unit 103 determines that the total bandwidth amount, which is the sum of the existing accumulated bandwidth amount and the new bandwidth amount included in the bandwidth reservation request information acquired by the reception unit 101 in step S300, is It is determined whether or not the upper limit of the SBC virtual path threshold set in the media communication service class is exceeded. If the total bandwidth exceeds the upper limit of the threshold value, in step S306, the alarm unit 105 outputs an alarm and ends the SIP negotiation. In step S305, when the total bandwidth does not exceed the upper limit of the threshold, the SIP negotiation is successful and communication is established.

<Alarm output pattern (SBC virtual path / voice communication)>
Next, with reference to FIG. 9, the band accumulation process and the alarm issue process based on the above-described accumulation determination policy and alarm determination policy when the resource management apparatus 11 acquires a bandwidth reservation request (AAR) will be described. FIG. 9 shows a comparison determination pattern when AAR (voice communication) is received for SBC virtual path determination. “SBC virtual path upper limit band” = “SRV_G711 upper limit band” + “SRV_Multimedia upper limit band”, and “SRV_G711 upper limit band” = “emergency band” + “UR1 band” + “UR band” + “GN band” It is.

(Pattern 1)
The comparison determination unit 103 compares the “stacked band” and the “SRV_Multimedia upper limit band” illustrated in FIG. 9 stored in the storage unit 102. At this time, since the “stacked bandwidth” does not exceed the “SRV_Multimedia upper limit bandwidth”, the comparison determination unit 103 does not request the alarm unit 105 to issue an alarm. Subsequently, the comparison / determination unit 103 compares “accumulated bandwidth” + “new AAR (voice communication)” and “SRV_Multimedia upper limit bandwidth”, which are upper limit bands after accumulation by “new AAR (voice communication)”. At this time, since “stacked band” + “new AAR (voice communication)” does not exceed “SRV_Multimedia upper limit band”, the comparison / determination unit 103 does not request the alarm unit 105 to issue an alarm. Furthermore, since “accumulated bandwidth” + “new AAR (voice communication)” is equal to or less than “(4) general”, it is possible to accumulate “new AAR (voice communication)”. It is determined that “AAR (voice communication)” can be stacked. Based on the determination of the comparison determination unit 103, the setting unit 104 controls the media gateway 500 shown in FIG. 2 so that “new AAR (voice communication)” can be stacked on the “stacked bandwidth”.

(Pattern 2)
The comparison determination unit 103 compares the “stacked band” and the “SRV_Multimedia upper limit band” illustrated in FIG. 9 stored in the storage unit 102. At this time, since the “stacked bandwidth” does not exceed the “SRV_Multimedia upper limit bandwidth”, the comparison determination unit 103 does not request the alarm unit 105 to issue an alarm. Subsequently, the comparison / determination unit 103 compares “accumulated bandwidth” + “new AAR (voice communication)” and “SRV_Multimedia upper limit bandwidth”, which are upper limit bands after accumulation by “new AAR (voice communication)”. At this time, since “stacked bandwidth” + “new AAR (voice communication)” is equal to or less than “(4) general threshold”, the comparison determination unit 103 does not request the alarm unit 105 to issue an alarm. Furthermore, since “accumulated bandwidth” + “new AAR (voice communication)” is equal to or less than “(4) general threshold”, “new AAR (voice communication)” can be stacked. Therefore, the comparison determination unit 103 determines that “new AAR (voice communication)” can be stacked. Based on the determination of the comparison determination unit 103, the setting unit 104 controls the media gateway 500 shown in FIG. 2 so that “new AAR (voice communication)” can be stacked on the “stacked bandwidth”.

(Pattern 3)
The comparison determination unit 103 compares the “stacked band” and the “SRV_Multimedia upper limit band” illustrated in FIG. 9 stored in the storage unit 102. At this time, the “stacked bandwidth” exceeds the “SRV_Multimedia upper limit bandwidth”, but since the service class of the bandwidth securing request is voice communication, the comparison determination unit 103 notifies the alarm unit 105 based on the alarm determination policy described above. Do not request output. Subsequently, the comparison / determination unit 103 compares “stacked bandwidth” + “new AAR (voice communication)” and “SRV_G711 upper limit bandwidth”, which are upper limit bands after being stacked by “new AAR (voice communication)”. At this time, “stacked bandwidth” + “new AAR (voice communication)” is not less than “(4) general threshold” and not more than “(3) priority threshold”, and therefore belongs to the UR bandwidth.

  Therefore, when “new AAR (voice communication)” has a priority of “general (GN)”, the GN band is exceeded, so that the comparison determination unit 103 outputs an alarm corresponding to GN. The alarm unit 105 issues an alarm corresponding to GN. Furthermore, since “new AAR (voice communication)” exceeds the GN band, the comparison / determination unit 103 determines that the accumulated band is NG.

  In addition, when “new AAR (voice communication)” has a priority of “priority (UR)”, “high priority (UR1)”, and “top priority (emergency)”, the GN band is exceeded. Therefore, the comparison determination unit 103 requests the alarm unit 105 to output an alarm corresponding to GN, and the alarm unit 105 issues an alarm corresponding to GN. Furthermore, since “new AAR (voice communication)” does not exceed any of the UR band, the UR1 band, and the emergency band, the comparison / determination unit 103 determines that the band accumulation is OK.

(Pattern 4)
Although the “accumulated bandwidth” exceeds the “SRV_Multimedia upper limit bandwidth”, the service class of the bandwidth securing request is voice communication, so the comparison determination unit 103 outputs an alarm to the alarm unit 105 based on the alarm determination policy described above. Do not make a request. Subsequently, the comparison / determination unit 103 compares “stacked bandwidth” + “new AAR (voice communication)” and “SRV_G711 upper limit bandwidth”, which are upper limit bands after being stacked by “new AAR (voice communication)”. At this time, “stacked bandwidth” + “new AAR (voice communication)” is not less than “(2) high priority threshold” and not more than “(1) highest priority threshold”, and therefore belongs to the emergency bandwidth.

  Therefore, when “new AAR (voice communication)” has a priority of “general (GN)” or “priority (UR)”, the comparison determination unit 103 outputs an alarm because it does not belong to the GN band and the UR band. The alarm unit 105 is not requested to do so. Furthermore, since the upper limit band of “new AAR (voice communication)” exceeds “(4) general threshold” and “(3) priority threshold”, the comparison / determination unit 103 determines that the accumulated band is NG.

  In addition, when “new AAR (voice communication)” has a priority of “high priority (UR1)”, “new AAR (voice communication)” belongs to the UR1 band and exceeds “(2) high priority threshold”. Therefore, the comparison determination unit 103 requests the alarm unit 105 to output an alarm corresponding to UR1, and the alarm unit 105 issues an alarm corresponding to UR1. Furthermore, since the upper limit band of “new AAR (voice communication)” exceeds “(2) high priority threshold”, the comparison determination unit 103 determines that the accumulated band is NG.

  In addition, when “new AAR (voice communication)” has a priority of “highest priority (emergency)”, “new AAR (voice communication)” belongs to the UR1 band and exceeds “(2) high priority threshold”. Therefore, the comparison determination unit 103 requests the alarm unit 105 to output an alarm corresponding to UR1, and the alarm unit 105 issues an alarm corresponding to UR1. Furthermore, since “new AAR (voice communication)” does not exceed the emergency band, the comparison / determination unit 103 determines that the accumulated band is OK.

(Pattern 5)
Although the “accumulated bandwidth” exceeds the “SRV_Multimedia upper limit bandwidth”, the service class of the bandwidth securing request is voice communication, so the comparison determination unit 103 outputs an alarm to the alarm unit 105 based on the alarm determination policy described above. Do not make a request. Subsequently, the comparison / determination unit 103 compares “stacked bandwidth” + “new AAR (voice communication)” and “SRV_G711 upper limit bandwidth”, which are upper limit bands after being stacked by “new AAR (voice communication)”. At this time, since the upper limit band of “stacked band” + “new AAR (voice communication)” is not less than “(3) priority threshold” and not more than “(2) high priority threshold”, it belongs to the UR1 band. Further, “new AAR (voice communication)” belongs to the GN band, the UR band, and the UR1 band.

  Therefore, when “new AAR (voice communication)” has a priority of “general (GN)”, “new AAR (voice communication)” belongs to the GN band and exceeds “(4) general band”. The comparison determination unit 103 requests the alarm unit 105 to output an alarm corresponding to GN, and the alarm unit 105 issues an alarm corresponding to GN. Further, since the upper limit band of “new AAR (voice communication)” exceeds “(4) general threshold value”, the comparison determination unit 103 determines that the accumulated band is NG.

  When “new AAR (voice communication)” has a priority of “priority (UR)”, “new AAR (voice communication)” belongs to the UR band, and “(4) general threshold” and “(3 Since the priority threshold value is exceeded, the comparison / determination unit 103 requests the alarm unit 105 to output alarms corresponding to GN and UR, respectively, and the alarm unit 105 issues alarms corresponding to GN and UR, respectively. Furthermore, since the upper limit band of “new AAR (voice communication)” exceeds “(3) priority threshold”, the comparison determination unit 103 determines that the accumulated band is NG.

  In addition, when “new AAR (voice communication)” has a priority of “high priority (UR1)” or “highest priority (emergency)”, “new AAR (voice communication)” belongs to the GN band and the UR band. , “(4) General threshold” and “(3) Priority threshold” are exceeded, the comparison determination unit 103 requests the alarm unit 105 to output alarms corresponding to GN and UR, respectively. And alarms corresponding to UR are issued. Furthermore, since the upper limit band of “new AAR (voice communication)” does not exceed “(1) highest priority threshold value”, the comparison determination unit 103 determines that the accumulation of bands is OK.

(Pattern 6)
Although the “accumulated bandwidth” exceeds the “SRV_Multimedia upper limit bandwidth”, the service class of the bandwidth securing request is voice communication, so the comparison determination unit 103 outputs an alarm to the alarm unit 105 based on the alarm determination policy described above. Do not make a request. Subsequently, the comparison / determination unit 103 compares “stacked bandwidth” + “new AAR (voice communication)” and “SRV_G711 upper limit bandwidth”, which are upper limit bands after being stacked by “new AAR (voice communication)”. At this time, since the upper limit band of “stacked band” + “new AAR (voice communication)” is not less than “(2) high priority threshold” and not more than “(1) highest priority threshold”, it belongs to the emergency band. Further, “new AAR (voice communication)” belongs to the UR band, the UR1 band, and the emergency band.

  Therefore, when “new AAR (voice communication)” has the priority of “general (GN)”, since “new AAR (voice communication)” does not belong to the GN band, the comparison determination unit 103 outputs an alarm. The alarm unit 105 is not requested. Further, since the upper limit band of “new AAR (voice communication)” exceeds “(4) general threshold value”, the comparison determination unit 103 determines that the accumulated band is NG.

  Also, when “new AAR (voice communication)” has a priority of “priority (UR)”, “new AAR (voice communication)” belongs to the UR band and exceeds “(3) priority threshold”. The comparison determination unit 103 requests the alarm unit 105 to output an alarm corresponding to the UR, and the alarm unit 105 issues an alarm corresponding to the UR. Furthermore, since the upper limit band of “new AAR (voice communication)” exceeds “(3) priority threshold”, the comparison determination unit 103 determines that the accumulated band is NG.

  Further, when “new AAR (voice communication)” has a priority of “high priority (UR1)”, “new AAR (voice communication)” belongs to the UR band and the UR1 band, and “(3) priority threshold” In addition, since the “(2) high priority threshold” is exceeded, the comparison determination unit 103 requests the alarm unit 105 to output an alarm corresponding to UR and UR1, respectively, and the alarm unit 105 outputs an alarm corresponding to UR and UR1. Issue each. Furthermore, since the upper limit band of “new AAR (voice communication)” exceeds “(2) high priority threshold”, the comparison determination unit 103 determines that the accumulated band is NG.

  When “new AAR (voice communication)” has a priority of “highest priority (emergency)”, “new AAR (voice communication)” belongs to the UR band and the UR1 band, and “(3) priority threshold” In addition, since the “(2) high priority threshold” is exceeded, the comparison determination unit 103 requests the alarm unit 105 to output an alarm corresponding to UR and UR1, respectively, and the alarm unit 105 outputs an alarm corresponding to UR and UR1. Issue each. Furthermore, since the upper limit band of “new AAR (voice communication)” does not exceed “(1) highest priority threshold value”, the comparison determination unit 103 determines that the accumulation of bands is OK.

<Alarm output pattern (SBC virtual path / multimedia communication)>
Next, with reference to FIG. 10, the band accumulation process and the alarm issue process based on the above-described accumulation determination policy and alarm determination policy when the resource management apparatus 11 acquires a bandwidth reservation request (AAR) will be described. FIG. 10 shows a comparison determination pattern when AAR (multimedia communication) is received for SBC virtual path determination.

(Pattern 1)
“Stacked bandwidth” does not exceed “SRV_Multimedia upper limit” and “Stacked bandwidth” + “New AAR (multimedia communication)”, which is the upper limit bandwidth after stacking by “new AAR (multimedia communication)”, is also “SRV_Multimedia upper limit” The comparison determination unit 103 does not request the alarm unit 105 to output an alarm. Furthermore, since the upper limit band of “new AAR (multimedia communication)” does not exceed the “SRV_Multimedia upper limit”, the comparison determination unit 103 determines that the accumulation of bands is OK.

(Pattern 2)
“Stacked bandwidth” does not exceed “SRV_Multimedia upper limit”, but “Stacked bandwidth” + “New AAR (multimedia communication)” is “SRV_Multimedia upper limit” after being stacked by “new AAR (multimedia communication)” Therefore, the comparison determination unit 103 requests the alarm unit 105 to output an alarm corresponding to SRV_Multimedia, and the alarm unit 105 issues an alarm corresponding to SRV_Multimedia. Furthermore, since the upper limit band of “new AAR (multimedia communication)” exceeds the “SRV_Multimedia upper limit”, the comparison determination unit 103 determines that the accumulated band is NG.

(Pattern 3)
Since the “stacked bandwidth” exceeds the “SRV_Multimedia upper limit”, the comparison / determination unit 103 requests the alarm unit 105 to output an alarm corresponding to SRV_Multimedia, and the alarm unit 105 issues an alarm corresponding to SRV_Multimedia. Furthermore, since the upper limit band of “new AAR (multimedia communication)” exceeds the “SRV_Multimedia upper limit”, the comparison determination unit 103 determines that the accumulated band is NG.

(Pattern 4)
Since the “stacked bandwidth” exceeds the “SRV_Multimedia upper limit”, the comparison / determination unit 103 requests the alarm unit 105 to output an alarm corresponding to SRV_Multimedia, and the alarm unit 105 issues an alarm corresponding to SRV_Multimedia. Furthermore, since the upper limit band of “new AAR (multimedia communication)” exceeds the “SRV_Multimedia upper limit”, the comparison determination unit 103 determines that the accumulated band is NG.

<Alarm output pattern (L2SW virtual path / voice communication)>
Next, with reference to FIG. 11, when the resource management device 11 acquires a bandwidth securing request (AAR), a bandwidth accumulation process and an alarm issue process based on the above-described accumulation determination policy and alarm determination policy will be described. FIG. 11 shows a comparison determination pattern when AAR (voice communication) is received for L2SW virtual path determination.

(Pattern 1)
“Stacked band 1” does not exceed “SRV_Multimedia upper limit”, and “Stacked band 1” + “New AAR (voice communication)”, which is the upper limit band after “New AAR (voice communication)” is stacked, is also “SRV_Multimedia upper limit”. The comparison determination unit 103 does not request the alarm unit 105 to output an alarm. Furthermore, since the upper limit band of “new AAR (voice communication)” does not exceed the “SRV_Multimedia upper limit”, the comparison determination unit 103 determines that the accumulation of bands is OK.

(Pattern 2)
Since “stacked band 1” does not exceed “SRV_Multimedia upper limit”, comparison determination unit 103 does not request alarm unit 105 to output an alarm. In the L2SW virtual path, because there is a band separation between the SRV_Multimedia upper limit band and the SRV_G711 upper limit band, “new AAR (voice communication)” is stacked from the lower limit of the GN band regardless of the size of the stacked band. It is done. Since the upper limit band of “new AAR (voice communication)” after accumulation belongs to the GN band and does not exceed “(4) general threshold”, the comparison determination unit 103 does not request the alarm unit 105 to output an alarm. Furthermore, since the upper limit band of “new AAR (voice communication)” belongs to the GN band and does not exceed “(4) general threshold value”, the comparison determination unit 103 determines that the accumulation of bands is OK.

(Pattern 3)
Since “stacked band 1” is the same as “SRV_Multimedia upper limit”, comparison determination unit 103 does not request alarm unit 105 to output an alarm. Further, since the upper limit band of “new AAR (voice communication)” after accumulation belongs to the GN band and does not exceed “(4) general threshold”, the comparison determination unit 103 does not request the alarm unit 105 to output an alarm. . Furthermore, since the upper limit band of “new AAR (voice communication)” belongs to the GN band and does not exceed “(4) general threshold value”, the comparison determination unit 103 determines that the accumulation of bands is OK.

(Pattern 4)
“Stacked band 2” is stacked in the SRV_G711 upper limit band, but “Stacked band 1” does not exceed “SRV_Multimedia upper limit”, and “New AAR (voice communication)” exists in the remaining band of “SRV_Multimedia upper limit”. Therefore, “new AAR (voice communication)” is stacked in “stacked band 1”.

  Then, because “upload band 1” + “new AAR (voice communication)”, which is the upper limit band after stacking by “new AAR (voice communication)” does not exceed “SRV_Multimedia upper limit”, the comparison determination unit 103 generates an alarm. The alarm unit 105 is not requested to output. Furthermore, since the upper limit band of “new AAR (voice communication)” does not exceed the “SRV_Multimedia upper limit”, the comparison determination unit 103 determines that the accumulation of bands is OK.

(Pattern 5)
“Stacked band 2” is stacked in the SRV_G711 upper limit band, but since there is no band amount for stacking “new AAR (voice communication)” in the remaining band of “SRV_Multimedia upper limit”, “new AAR (voice communication)” is It is piled up in “stacking zone 2”. Then, “stacked band 1” + “new AAR (voice communication)”, which is the upper limit band after stacking by “new AAR (voice communication)” belongs to the GN band, the UR band, and the UR1 band, and “new AAR ( The upper limit band of “voice communication” ”is not less than“ (3) priority threshold value ”and not more than“ (2) high priority threshold value ”, and therefore belongs to the UR1 band.

  Therefore, when “new AAR (voice communication)” has a priority of “general (GN)”, “new AAR (voice communication)” belongs to the GN band and exceeds “(4) general threshold”. The comparison determination unit 103 requests the alarm unit 105 to output an alarm corresponding to GN, and the alarm unit 105 issues an alarm corresponding to GN. Further, since the upper limit band of “new AAR (voice communication)” exceeds “(4) general threshold value”, the comparison determination unit 103 determines that the accumulated band is NG.

  When “new AAR (voice communication)” has a priority of “priority (UR)”, “new AAR (voice communication)” belongs to the GN band and the UR band, and “(4) general threshold” and Since “(3) priority threshold” is exceeded, the comparison determination unit 103 requests the alarm unit 105 to output alarms corresponding to GN and UR, respectively, and the alarm unit 105 issues alarms corresponding to GN and UR, respectively. To do. Furthermore, since the upper limit band of “new AAR (voice communication)” exceeds “(4) general threshold” and “(3) priority threshold”, the comparison / determination unit 103 determines that the accumulated band is NG.

  In addition, when “new AAR (voice communication)” has a priority of “high priority (UR1)” or “highest priority (emergency)”, “new AAR (voice communication)” belongs to the GN band and the UR band. , “(4) General threshold” and “(3) Priority threshold” are exceeded, the comparison determination unit 103 requests the alarm unit 105 to output alarms corresponding to GN and UR, respectively. And alarms corresponding to UR are issued. Furthermore, since the upper limit band of “new AAR (voice communication)” does not exceed “(2) high priority threshold”, the comparison determination unit 103 determines that the accumulation of bands is OK.

(Pattern 6)
For the same reason as “Pattern 5”, “New AAR (voice communication)” is stacked in “Stacked band 2”. The accumulated “new AAR (voice communication)” belongs to the UR band, the UR1 band, and the emergency band. Further, since the upper limit band of “new AAR (voice communication)” is not less than “(2) high priority threshold” and not more than “(1) highest priority threshold”, it belongs to the emergency band.

  Therefore, when “new AAR (voice communication)” has the priority of “general (GN)”, since “new AAR (voice communication)” does not belong to the GN band, the comparison determination unit 103 outputs an alarm. The alarm unit 105 is not requested. Further, since the upper limit band of “new AAR (voice communication)” exceeds “(4) general threshold value”, the comparison determination unit 103 determines that the accumulated band is NG.

  Also, when “new AAR (voice communication)” has a priority of “priority (UR)”, “new AAR (voice communication)” belongs to the UR band and exceeds “(3) priority threshold”. The comparison determination unit 103 requests the alarm unit 105 to output an alarm corresponding to the UR, and the alarm unit 105 issues an alarm corresponding to the UR. Furthermore, since the upper limit band of “new AAR (voice communication)” exceeds “(3) priority threshold”, the comparison determination unit 103 determines that the accumulated band is NG.

  Further, when “new AAR (voice communication)” has a priority of “high priority (UR1)”, “new AAR (voice communication)” belongs to the UR band and the UR1 band, and “(3) priority threshold” In addition, since the “(2) high priority threshold” is exceeded, the comparison determination unit 103 requests the alarm unit 105 to output an alarm corresponding to UR and UR1, respectively, and the alarm unit 105 outputs an alarm corresponding to UR and UR1. Issue each. Furthermore, since the upper limit band of “new AAR (voice communication)” exceeds “(2) high priority threshold”, the comparison determination unit 103 determines that the accumulated band is NG.

  When “new AAR (voice communication)” has a priority of “highest priority (emergency)”, “new AAR (voice communication)” belongs to the UR band and the UR1 band, and “(3) priority threshold” In addition, since the “(2) high priority threshold” is exceeded, the comparison determination unit 103 requests the alarm unit 105 to output an alarm corresponding to UR and UR1, respectively, and the alarm unit 105 outputs an alarm corresponding to UR and UR1. Issue each. Furthermore, since the upper limit band of “new AAR (voice communication)” does not exceed “(1) highest priority threshold value”, the comparison determination unit 103 determines that the accumulation of bands is OK.

(Pattern 7)
Since “stacked band 1” is the same as “SRV_Multimedia upper limit”, comparison determination unit 103 does not request alarm unit 105 to output an alarm. Also, for the same reason as “Pattern 5”, “New AAR (voice communication)” is stacked in “Stacked bandwidth 2”. The accumulated “new AAR (voice communication)” belongs to the UR1 band and the emergency band. Further, since the upper limit band of “new AAR (voice communication)” is equal to or greater than “(1) highest priority threshold value”, it exceeds the SRV_G711 upper limit band.

  Therefore, when “new AAR (voice communication)” has the priority of “general (GN)”, since “new AAR (voice communication)” does not belong to the GN band, the comparison determination unit 103 outputs an alarm. The alarm unit 105 is not requested. Further, since the upper limit band of “new AAR (voice communication)” exceeds “(4) general threshold value”, the comparison determination unit 103 determines that the accumulated band is NG.

  When “new AAR (voice communication)” has a priority of “priority (UR)”, since “new AAR (voice communication)” does not belong to the UR band, the comparison determination unit 103 outputs an alarm. The alarm unit 105 is not requested. Furthermore, since the upper limit band of “new AAR (voice communication)” exceeds “(3) priority threshold”, the comparison determination unit 103 determines that the accumulated band is NG.

  In addition, when “new AAR (voice communication)” has a priority of “high priority (UR1)”, “new AAR (voice communication)” belongs to the UR1 band and exceeds “(2) high priority threshold”. Therefore, the comparison determination unit 103 requests the alarm unit 105 to output an alarm corresponding to UR1, and the alarm unit 105 issues an alarm corresponding to UR1. Furthermore, since the upper limit band of “new AAR (voice communication)” exceeds “(2) high priority threshold”, the comparison determination unit 103 determines that the accumulated band is NG.

  If “new AAR (voice communication)” has a priority of “highest priority (emergency)”, “new AAR (voice communication)” belongs to the emergency band and exceeds “(1) highest priority threshold”. Therefore, the comparison / determination unit 103 requests the alarm unit 105 to output an alarm corresponding to the error, and the alarm unit 105 issues an alarm corresponding to the emergency. Furthermore, since the upper limit band of “new AAR (voice communication)” exceeds “(1) highest priority threshold value”, the comparison / determination unit 103 determines that the accumulated band is NG.

<Alarm output pattern (L2SW virtual path / multimedia communication)>
Next, referring to FIG. 12, when the resource management apparatus 11 acquires a bandwidth securing request (AAR), the bandwidth accumulation processing and alarm issuing processing based on the above-described accumulation determination policy and alarm determination policy will be described. FIG. 12 shows a comparison determination pattern when AAR (multimedia communication) is received for L2SW virtual path determination.

(Pattern 1)
“Stacked band 1” does not exceed “SRV_Multimedia upper limit”, and “Stacked band 1” + “New AAR (multimedia communication)”, which is the upper limit band after “New AAR (multimedia communication)” is stacked, Since the SRV_Multimedia upper limit is not exceeded, the comparison determination unit 103 does not request the alarm unit 105 to output an alarm. Furthermore, since the upper limit band of “new AAR (multimedia communication)” does not exceed the “SRV_Multimedia upper limit”, the comparison determination unit 103 determines that the accumulation of bands is OK.

(Pattern 2)
Since “stacked band 1” is the same as “SRV_Multimedia upper limit”, comparison determination unit 103 does not request alarm unit 105 to output an alarm. Here, “new AAR (multimedia communication)” can be stacked across the divided bands of the SRV_Multimedia upper limit band and the SRV_G711 upper limit band. For this reason, the upper limit band of “new AAR (multimedia communication)” after stacking exceeds the “SRV_Multimedia upper limit”, but does not belong to the GN band.

  Therefore, since the upper limit band of “new AAR (multimedia communication)” exceeds the “SRV_Multimedia upper limit”, the comparison determination unit 103 requests the alarm unit 105 to output an alarm corresponding to the SRV_Multimedia upper limit band, and the alarm unit 105 Issues an alarm corresponding to the SRV_Multimedia upper limit band. Furthermore, since the upper limit band of “new AAR (multimedia communication)” exceeds the “SRV_Multimedia upper limit”, the comparison determination unit 103 determines that the accumulated band is NG.

(Pattern 3)
“Stacked band 2” is stacked in the SRV_G711 upper limit band, but “Stacked band 1” does not exceed “SRV_Multimedia upper limit”, and “SRV_Multimedia upper limit” remains in the remaining band “New AAR (multimedia communication)” As a result, “new AAR (voice communication)” is stacked in “stacked band 1”.

  Then, the upper limit band after stacking by “new AAR (multimedia communication)”, “stacked band 1” + “new AAR (multimedia communication)” does not exceed “SRV_Multimedia upper limit”. The alarm unit 105 is not requested to output an alarm. Furthermore, since the upper limit band of “new AAR (multimedia communication)” does not exceed the “SRV_Multimedia upper limit”, the comparison determination unit 103 determines that the accumulation of bands is OK.

(Pattern 4)
“Stacked band 2” is stacked in the SRV_G711 upper limit band, but “Stacked band 1” does not exceed “SRV_Multimedia upper limit”, and “SRV_Multimedia upper limit” remains in the remaining band “New AAR (multimedia communication)” There is also no amount of bandwidth to accumulate. However, “new AAR (multimedia communication)” can be stacked across the divided bands of the SRV_Multimedia upper limit band and the SRV_G711 upper limit band. As a result, the upper limit band of “new AAR (multimedia communication)” after stacking exceeds the “SRV_Multimedia upper limit”, but does not belong to the GN band.

  Therefore, since the upper limit band of “new AAR (multimedia communication)” exceeds the “SRV_Multimedia upper limit”, the comparison determination unit 103 requests the alarm unit 105 to output an alarm corresponding to the SRV_Multimedia upper limit band, and the alarm unit 105 Issues an alarm corresponding to the SRV_Multimedia upper limit band. Furthermore, since the upper limit band of “new AAR (multimedia communication)” exceeds the “SRV_Multimedia upper limit”, the comparison determination unit 103 determines that the accumulated band is NG.

(Pattern 5)
Since “stacked band 1” is the same as “SRV_Multimedia upper limit”, comparison determination unit 103 does not request alarm unit 105 to output an alarm. Here, “new AAR (multimedia communication)” can be stacked across the divided bands of the SRV_Multimedia upper limit band and the SRV_G711 upper limit band. For this reason, the upper limit band of “new AAR (multimedia communication)” after stacking exceeds the “SRV_Multimedia upper limit”, but does not belong to the GN band.

  Therefore, since the upper limit band of “new AAR (multimedia communication)” exceeds the “SRV_Multimedia upper limit”, the comparison determination unit 103 requests the alarm unit 105 to output an alarm corresponding to the SRV_Multimedia upper limit band, and the alarm unit 105 Issues an alarm corresponding to the SRV_Multimedia upper limit band. Furthermore, since the upper limit band of “new AAR (multimedia communication)” exceeds the “SRV_Multimedia upper limit”, the comparison determination unit 103 determines that the accumulated band is NG.

<Alarm output pattern (number of media streams / voice communication)>
Next, with reference to FIG. 13, when the resource management apparatus 11 acquires a bandwidth reservation request (AAR), the media stream number accumulation process and the alarm issue process based on the above-described accumulation determination policy and alarm determination policy will be described. FIG. 13 shows a comparison determination pattern of the number of media streams when AAR (voice communication) is received in the SBC virtual path.

(Pattern 1)
“Number of stacked media streams” does not exceed “(4) General / Multimedia threshold” and is the upper limit number of media streams after stacking by “new AAR (voice communication)”, “number of stacked media streams” + “new AAR” Since “(voice communication)” does not exceed “(4) general / multimedia threshold”, the comparison determination unit 103 does not request the alarm unit 105 to output an alarm. Further, since the upper limit number of media streams of “new AAR (voice communication)” does not exceed “(4) general / multimedia threshold”, the comparison determination unit 103 determines that the accumulation of the number of media streams is OK.

(Pattern 2)
When “new AAR (voice communication)” has a priority of “general (GN)”, “new AAR (voice communication)” exceeds “(4) general / multimedia threshold”, so the comparison determination unit 103 Requests the alarm unit 105 to output an alarm corresponding to GN, and the alarm unit 105 issues an alarm corresponding to GN. Further, since the upper limit number of media streams of “new AAR (voice communication)” exceeds “(4) general / multimedia threshold”, the comparison determination unit 103 determines that the accumulation of the number of media streams is NG.

  In addition, when “new AAR (voice communication)” has priorities of “priority (UR)”, “high priority (UR1)” and “top priority (emergency)”, “new AAR (voice communication)” Since the lower limit coincides with “(4) general / multimedia threshold value”, the comparison determination unit 103 requests the alarm unit 105 to output an alarm corresponding to GN, and the alarm unit 105 issues an alarm corresponding to GN. Furthermore, since the upper limit band of “new AAR (voice communication)” does not exceed “(3) priority threshold”, the comparison determination unit 103 determines that the accumulation of the number of media streams is OK.

(Pattern 3)
When “new AAR (voice communication)” has a priority of “general (GN)”, “new AAR (voice communication)” exceeds “(4) general / multimedia threshold”, but voice and multimedia Since it does not belong to the communication media stream number (GN media stream number), the comparison determination unit 103 does not request the alarm unit 105 to output an alarm. Further, since the upper limit number of media streams of “new AAR (voice communication)” exceeds “(4) general / multimedia threshold”, the comparison determination unit 103 determines that the accumulation of the number of media streams is NG.

  When “new AAR (voice communication)” has a priority of “priority (UR)”, the upper limit number of media streams of “new AAR (voice communication)” is equal to or greater than “(3) priority threshold value”. Since (2) “high priority threshold” or less, it belongs to the number of UR1 media streams. Further, since the lower limit of “new AAR (voice communication)” matches “(3) priority threshold”, the comparison determination unit 103 requests the alarm unit 105 to output an alarm corresponding to the UR, and the alarm unit 105 An alarm corresponding to the UR is issued. Furthermore, since the upper limit number of media streams of “new AAR (voice communication)” exceeds “(3) priority threshold”, the comparison determination unit 103 determines that the accumulation of the number of media streams is NG.

  In addition, when “new AAR (voice communication)” has priority of “high priority (UR1)” and “highest priority (emergency)”, the lower limit of “new AAR (voice communication)” is “(3) priority” Since it matches the “threshold value”, the comparison determination unit 103 requests the alarm unit 105 to output an alarm corresponding to the UR, and the alarm unit 105 issues an alarm corresponding to the UR. Furthermore, since the upper limit number of media streams of “new AAR (voice communication)” does not exceed “(2) high priority threshold”, the comparison determination unit 103 determines that the accumulation of the number of media streams is OK.

(Pattern 4)
When “new AAR (voice communication)” has the priority of “general (GN)” and “priority (UR)”, “new AAR (voice communication)” exceeds “(2) high priority threshold”. However, since it does not belong to the number of GN media streams and the number of UR media streams, the comparison determination unit 103 does not request the alarm unit 105 to output an alarm. Further, since the upper limit number of media streams of “new AAR (voice communication)” exceeds “(4) general / multimedia threshold” and “(3) priority threshold”, the comparison determination unit 103 accumulates the number of media streams. Is determined to be NG.

  Further, when “new AAR (voice communication)” has a priority of “high priority (UR1)”, since “(2) high priority threshold” is exceeded, the comparison determination unit 103 generates an alarm corresponding to UR1. The alarm unit 105 is requested to output, and the alarm unit 105 issues an alarm corresponding to UR1. Further, since the upper limit number of media streams of “new AAR (voice communication)” exceeds “(2) high priority threshold”, the comparison determination unit 103 determines that the accumulation of the number of media streams is NG.

  Further, when “new AAR (voice communication)” has a priority of “highest priority (emergency)”, the upper limit number of media streams of “new AAR (voice communication)” is equal to or greater than “(2) high priority threshold”; Since it is equal to or less than “(1) highest priority threshold” and belongs to the number of emergency media streams, the comparison determination unit 103 requests the alarm unit 105 to output an alarm corresponding to UR1, and the alarm unit 105 outputs an alarm corresponding to UR1. Issue. Furthermore, since the upper limit number of media streams of “new AAR (voice communication)” does not exceed “(1) highest priority threshold”, the comparison determination unit 103 determines that the accumulation of the number of media streams is OK.

<Alarm output pattern (number of media streams / multimedia communication)>
Next, with reference to FIG. 14, when the resource management apparatus 11 acquires a bandwidth reservation request (AAR), the media stream number accumulation process and the alarm issue process based on the above-described accumulation determination policy and alarm determination policy will be described. FIG. 14 shows a comparison determination pattern of the number of media streams when AAR (multimedia communication) is received in the SBC virtual path.

(Pattern 1)
“Number of stacked media streams” does not exceed “(4) General / Multimedia threshold” and is the upper limit number of media streams after stacking by “new AAR (multimedia communication)”, “number of stacked media streams” + “new Since “AAR (multimedia communication)” does not exceed “(4) general / multimedia threshold”, the comparison determination unit 103 does not request the alarm unit 105 to output an alarm. Furthermore, since the upper limit number of media streams of “new AAR (multimedia communication)” does not exceed “(4) general / multimedia threshold”, the comparison determination unit 103 determines that the accumulation of the number of media streams is OK.

(Pattern 2)
Since the lower limit of “new AAR (multimedia communication)” coincides with “(4) general / multimedia threshold”, the comparison determination unit 103 requests the alarm unit 105 to output an alarm corresponding to GN, and the alarm unit 105 Issues an alarm corresponding to GN. Furthermore, since the upper limit number of media streams of “new AAR (multimedia communication)” exceeds “(4) general / multimedia threshold”, the comparison determination unit 103 determines that the accumulation of the number of media streams is NG.

(Pattern 3)
Regardless of the size of the “stacked media stream”, the lower limit of the stacked “new AAR (multimedia communication)” matches the “(4) general / multimedia threshold”, so the comparison determination unit 103 supports GN. The alarm unit 105 is requested to output an alarm to be output, and the alarm unit 105 issues an alarm corresponding to GN. Furthermore, since the upper limit number of media streams of “new AAR (multimedia communication)” exceeds “(4) general / multimedia threshold”, the comparison determination unit 103 determines that the accumulation of the number of media streams is NG.

<Alarm output pattern (SBC virtual path / voice communication, UR band = UR1 band = emergency band = 0)>
Next, with reference to FIG. 15, when the resource management apparatus 11 acquires a bandwidth reservation request (AAR), a bandwidth accumulation process and an alarm issue process based on the above-described accumulation determination policy and alarm determination policy will be described. FIG. 15 shows a band comparison determination pattern when AAR (voice communication) is received in the SBC virtual path. Further, the UR band, UR1 band, and emergency band included in the set SBC virtual path are set to zero.

(Pattern 1)
If “new AAR (voice communication)” has priorities of “general (GN)”, “priority (UR)”, “high priority (UR1)” and “highest priority (emergency)”, “new AAR ( Since the upper limit of “voice communication” does not exceed “(1) SRV_G711 upper limit threshold” that is the upper limit of the emergency band, the comparison determination unit 103 does not request the alarm unit 105 to output an alarm. Furthermore, since the upper limit band of “new AAR (voice communication)” does not exceed “(1) SRV_G711 upper limit threshold”, the comparison determination unit 103 determines that the accumulation of bands is OK.

(Pattern 2)
When “new AAR (voice communication)” has a priority of “general (GN)”, “new AAR (voice communication)” exceeds “(4) general upper limit threshold value”, so the comparison determination unit 103 Requests the alarm unit 105 to output an alarm corresponding to GN, and the alarm unit 105 issues an alarm corresponding to GN. Further, since the upper limit band of “new AAR (voice communication)” exceeds “(4) general threshold value”, the comparison determination unit 103 determines that the accumulated band is NG.

  In addition, when “new AAR (voice communication)” has a priority of “priority (UR)”, “new AAR (voice communication)” belongs to a threshold equal to or lower than the priority of “priority (UR)”. 4) Since the general threshold value ”and“ (3) priority threshold value ”are exceeded, the comparison determination unit 103 requests the alarm unit 105 to output alarms corresponding to GN and UR, respectively. Each corresponding alarm is issued. Furthermore, since the upper limit band of “new AAR (voice communication)” exceeds “(4) general threshold” and “(3) priority threshold”, the comparison / determination unit 103 determines that the accumulated band is NG.

  Further, when “new AAR (voice communication)” has a priority of “high priority (UR1)”, “new AAR (voice communication)” belongs to a threshold equal to or lower than the priority of “high priority (UR1)”. Since the “(4) general threshold”, “(3) priority threshold”, and “(2) high priority threshold” are exceeded, the comparison determination unit 103 outputs an alarm corresponding to GN, UR, and UR1, respectively. The alarm unit 105 issues alarms corresponding to GN, UR, and UR1, respectively. Furthermore, since the upper limit bandwidth of “new AAR (voice communication)” exceeds “(4) general threshold”, “(3) priority threshold”, and “(2) high priority threshold”, the comparison determination unit 103 It is determined that the accumulated band is NG.

  Further, when “new AAR (voice communication)” has a priority of “highest priority (emergency)”, “new AAR (voice communication)” belongs to a threshold equal to or lower than the priority of “highest priority (emergency)”. Since “(4) general threshold value”, “(3) priority threshold value”, “(2) high priority threshold value”, and “(1) highest priority threshold value” are exceeded, the comparison determination unit 103 determines that GN, UR, UR1, and error The alarm unit 105 is requested to output an alarm corresponding to each of the alarms, and the alarm unit 105 issues alarms corresponding to GN, UR, UR1, and an error, respectively. Furthermore, the upper limit band of “new AAR (voice communication)” exceeds “(4) general threshold”, “(3) priority threshold”, “(2) high priority threshold” and “(1) SRV_G711 upper limit threshold”. Therefore, the comparison / determination unit 103 determines that the accumulated band is NG.

(Pattern 3)
The lower limit of “new AAR (voice communication)” matches “(1) SRV_G711 upper limit threshold”, “(2) high priority threshold”, “(3) priority threshold”, and “(4) general threshold”, and “ The upper limit of “new AAR (voice communication)” exceeds the respective threshold.

Therefore, when “new AAR (voice communication)” has a priority of “general (GN)”, the comparison determination unit 103 requests the alarm unit 105 to output an alarm corresponding to GN, and the alarm unit 105 Issues an alarm corresponding to GN, respectively.

  When “new AAR (voice communication)” has a priority of “priority (UR)”, the comparison / determination unit 103 outputs an alarm corresponding to a priority of UR or lower, that is, an alarm corresponding to GN and UR, respectively. The alarm unit 105 is requested to output, and the alarm unit 105 issues alarms corresponding to GN and UR, respectively.

  When “new AAR (voice communication)” has a priority of “high priority (UR1)”, the comparison determination unit 103 corresponds to an alarm corresponding to a priority of UR1 or lower, that is, GN, UR and UR1. The alarm unit 105 is requested to output alarms, and the alarm unit 105 issues alarms corresponding to GN, UR, and UR1, respectively.

  In addition, when “new AAR (voice communication)” has a priority of “highest priority (emergency)”, the comparison determination unit 103 responds to alarms corresponding to priorities of urgent or lower, that is, GN, UR, UR1, and errors. The alarm unit 105 is requested to output corresponding alarms, and the alarm unit 105 issues alarms corresponding to GN, UR, UR1, and an error, respectively.

  Furthermore, since the upper limit of “new AAR (voice communication)” exceeds “(1) SRV_G711 upper limit threshold”, the comparison determination is made regardless of the priority of “new AAR (voice communication)”. Unit 103 determines that the band accumulation is NG.

<Alarm output pattern (SBC virtual path / voice communication, UR1 band = 0)>
Next, a band accumulation process and an alarm issue process based on the above-described accumulation determination policy and alarm determination policy when the resource management apparatus 11 acquires a bandwidth reservation request (AAR) will be described with reference to FIG. FIG. 16 shows a band comparison determination pattern when AAR (voice communication) is received in the SBC virtual path. Furthermore, the UR1 band included in the set SBC virtual path is set to 0.

(Pattern 1)
The upper limit of “new AAR (voice communication)” matches “(1) SRV_G711 upper limit threshold”, and “new AAR (voice communication)” belongs to the UR band, the UR1 band, and the emergency band. This is because “(3) priority threshold” and “(2) high priority threshold” match, so that “new AAR (voice communication)” can be regarded as belonging to the UR1 band.

When “new AAR (voice communication)” has a priority of “general (GN)”, since “new AAR (voice communication)” does not belong to the GN band, the comparison determination unit 103 outputs an alarm. The alarm unit 105 is not requested. Furthermore, since the upper limit band of “new AAR (voice communication)” exceeds “(4) general threshold”, the comparison determination unit 103 accumulates bands that are higher than the priority of “new AAR (voice communication)”. Is not determined, and the accumulation of the band is determined as NG.

  When “new AAR (voice communication)” has a priority of “priority (UR)”, the bandwidth of “new AAR (voice communication)” is equal to or greater than “(3) priority threshold” and “(1) SRV_G711. The comparison determination unit 103 requests the alarm unit 105 to output an alarm corresponding to the UR, and the alarm unit 105 issues an alarm corresponding to the UR. Furthermore, since the upper limit band of “new AAR (voice communication)” matches “(1) SRV_G711 upper limit threshold”, the comparison / determination unit 103 has a band higher than the priority of “new AAR (voice communication)”. The accumulation is not judged, and the accumulation of the band is determined as NG.

  When “new AAR (voice communication)” has a priority of “high priority (UR1)”, the bandwidth of “new AAR (voice communication)” is equal to or higher than “(3) priority threshold”, “(1) SRV_G711 threshold ”or less and belongs to the UR band and the emergency threshold, so the comparison determination unit 103 requests the alarm unit 105 to output an alarm corresponding to the priority of UR1 or less, that is, an alarm corresponding to UR and UR1. The alarm unit 105 issues alarms corresponding to UR and UR1, respectively. Furthermore, since the upper limit band of “new AAR (voice communication)” matches “(1) SRV_G711 upper limit threshold”, the comparison / determination unit 103 has a band higher than the priority of “new AAR (voice communication)”. The accumulation is not judged, and the accumulation of the band is determined as NG.

  When “new AAR (voice communication)” has a priority of “highest priority (emergency)”, the bandwidth of “new AAR (voice communication)” is equal to or greater than “(3) priority threshold”, and “(1) SRV_G711 threshold ”or less and belongs to the UR band and emergency threshold, so the comparison determination unit 103 has a priority of UR1 or less corresponding to the excess“ (3) priority threshold ”and“ (2) high priority threshold ”. The alarm unit 105 is requested to output alarms, that is, alarms corresponding to UR and UR1, respectively, and the alarm unit 105 issues alarms corresponding to UR and UR1, respectively. Further, since the upper limit band of “new AAR (voice communication)” matches the threshold “(1) SRV_G711 upper limit threshold” corresponding to the priority “highest priority (emergency)” and does not exceed, the comparison determination unit 103 determines that the band accumulation is OK.

(Pattern 2)
The upper limit of “new AAR (voice communication)” matches “(1) SRV_G711 upper limit threshold”, and “new AAR (voice communication)” belongs to the UR band, the UR1 band, and the emergency band. This is because “(3) priority threshold” and “(2) high priority threshold” match, so that “new AAR (voice communication)” can be regarded as belonging to the UR1 band.

When “new AAR (voice communication)” has a priority of “general (GN)”, since “new AAR (voice communication)” does not belong to the GN band, the comparison determination unit 103 outputs an alarm. The alarm unit 105 is not requested. Furthermore, since the upper limit band of “new AAR (voice communication)” exceeds “(4) general threshold”, the comparison determination unit 103 accumulates bands that are higher than the priority of “new AAR (voice communication)”. Is not determined, and the accumulation of the band is determined as NG.

  In addition, when “new AAR (voice communication)” has a priority of “priority (UR)”, the band of “new AAR (voice communication)” exceeds “(3) priority threshold”, so that comparison determination The unit 103 requests the alarm unit 105 to output an alarm corresponding to the UR, and the alarm unit 105 issues an alarm corresponding to the UR. Furthermore, since the upper limit band of “new AAR (voice communication)” exceeds “(1) SRV_G711 upper limit threshold”, the comparison / determination unit 103 determines that the accumulated band is NG.

  Further, when “new AAR (voice communication)” has a priority of “high priority (UR1)”, the bandwidth of “new AAR (voice communication)” is “(3) priority threshold” and “(2) high”. In order to exceed the “priority threshold value”, the comparison determination unit 103 requests the alarm unit 105 to output alarms corresponding to UR and UR1, respectively, and the alarm unit 105 issues alarms corresponding to UR and UR1. Furthermore, since the upper limit band of “new AAR (voice communication)” exceeds “(1) SRV_G711 upper limit threshold”, the comparison / determination unit 103 determines that the accumulated band is NG.

  Further, when “new AAR (voice communication)” has a priority of “highest priority (emergency)”, the bandwidth of “new AAR (voice communication)” is “(3) priority threshold” and “(2) high”. In order to exceed the “priority threshold” and “(1) SRV_G711 upper limit threshold”, the comparison determination unit 103 requests the alarm unit 105 to output an alarm corresponding to UR, UR1, and an error, respectively, and the alarm unit 105 includes UR, UR1. And alarms corresponding to errors are issued. Furthermore, since the upper limit band of “new AAR (voice communication)” exceeds “(1) SRV_G711 upper limit threshold”, the comparison / determination unit 103 determines that the accumulated band is NG.

(Pattern 3)
Since the lower limit of “new AAR (voice communication)” matches “(1) SRV_G711 upper limit threshold” and does not belong to the GN band, UR band, or emergency band, “new AAR (voice communication)” is “general (GN ) ”,“ Priority (UR) ”, and“ high priority (UR1) ”, the comparison determination unit 103 does not request the alarm unit 105 to output an alarm. Furthermore, since the upper limit band of “new AAR (voice communication)” exceeds “(1) SRV_G711 upper limit threshold”, the comparison / determination unit 103 determines that the accumulated band is NG.

  Further, when “new AAR (voice communication)” has a priority of “highest priority (emergency)”, the upper limit band of “new AAR (voice communication)” exceeds “(1) SRV_G711 upper limit threshold”. The comparison determination unit 103 requests the alarm unit 105 to output an alarm corresponding to the error, and the alarm unit 105 issues an alarm corresponding to the error. Furthermore, since the upper limit band of “new AAR (voice communication)” exceeds “(1) SRV_G711 upper limit threshold”, the comparison / determination unit 103 determines that the accumulated band is NG.

(Second Embodiment)
[Device configuration]
As shown in FIG. 17, the resource management apparatus 21 according to the second embodiment of the present invention further includes a bandwidth control unit 106 with respect to the resource management apparatus 11 according to the first embodiment of the present invention.

  As shown in FIG. 18, the bandwidth control unit 106 changes management data such as media gateway information, media gateway service classification information, L2SW virtual path information, and L2SW virtual path service classification information stored in the storage unit 102.

  That is, the bandwidth control unit 106 changes the maximum number of media streams and the SBC virtual path upper limit bandwidth in the virtual path with respect to the media gateway information. When the upper limit of the number of media streams is changed so as to be lower than the number of media streams at the time of change, the bandwidth control unit 106 outputs an information update notification of successful change, and the number of stacked media streams and the media streams in each virtual path after the change The comparison with the threshold value is performed again, and the alarm unit 105 issues an alarm in accordance with the alarm output policy. In addition, when the bandwidth control unit 106 changes the upper limit bandwidth of the SBC virtual path, if the upper limit bandwidth of the changed SBC virtual path is equal to or less than the accumulated bandwidth at the time of change, the upper limit of the SBC virtual path is determined based on the accumulation determination policy. The bandwidth has failed to be changed, and the bandwidth control unit 106 outputs an information update notification of the change failure. At this time, the alarm unit 105 does not issue an alarm because threshold comparison is unnecessary according to the alarm determination policy. When the bandwidth control unit 106 changes the upper limit bandwidth of the SBC virtual path, if the upper limit bandwidth of the changed SBC virtual path remains equal to or greater than the accumulated bandwidth at the time of the change, the bandwidth control unit 106 notifies the information update notification of the successful change. The comparison determination unit 103 compares the accumulated bandwidth with the threshold value of the bandwidth in the changed SBC virtual path again, and the alarm unit 105 issues an alarm in accordance with the alarm output policy.

  Further, the band control unit 106 changes the voice service upper limit band whose service class is voice communication with respect to the service classification information in the media gateway. When the upper limit bandwidth of SRV_G711, which is the service class of the voice communication after the change, is equal to or less than the accumulated bandwidth at the time of alteration, the bandwidth control unit 106 outputs an information update notification of the successful change, and the comparison determining unit 103 changes the accumulated bandwidth. Comparison with each threshold value of the upper limit band of SRV_G711 in the later SBC virtual path is performed again, and the alarm unit 105 issues an alarm in accordance with the alarm output policy.

  Furthermore, the bandwidth control unit 106 changes the upper limit bandwidth of the L2SW virtual path with respect to the L2SW virtual path information. In the case where the upper limit bandwidth of the L2SW virtual path after the change is less than or equal to the accumulated bandwidth at the time of change, and further less than or equal to the existing accumulated bandwidth, the bandwidth control unit 106 outputs a change failure information update notification. If the upper limit bandwidth of the L2SW virtual path after the change is less than or equal to the accumulated bandwidth at the time of change, and further less than or equal to the total bandwidth obtained by adding the new AAR to the existing accumulated bandwidth, the bandwidth control unit 106 updates the information on the successful change The notification is output, the comparison and determination unit 103 again compares the accumulated bandwidth with the threshold values of the bandwidth in the changed L2SW virtual path, and the alarm unit 105 issues an alarm in accordance with the alarm output policy.

  Furthermore, the bandwidth control unit 106 changes the upper limit bandwidth for each service class in the L2SW virtual path with respect to the service classification information in the L2SW virtual path. If the upper limit bandwidth after change in each service in the L2SW virtual path is equal to or greater than the accumulated bandwidth at the time of change, the bandwidth control unit 106 outputs an information update notification of the successful change, and the comparison determination unit 103 The comparison with the band after the change in the L2SW virtual path is performed again, and the alarm unit 105 issues an alarm in accordance with the alarm output policy. If the upper limit bandwidth after the change in each service in the L2SW virtual path is equal to or less than the accumulated bandwidth at the time of change, the bandwidth control unit 106 outputs a change failure information update notification. At this time, the alarm unit 105 does not issue an alarm because threshold comparison is unnecessary according to the alarm determination policy. For example, when the upper limit band of SRV_Multimedia is equal to or less than the accumulated band at the time of change, the band control unit 106 outputs an information update notification of change failure, and the alarm unit 105 does not issue an alarm.

[Band change pattern]
Next, a pattern in which the bandwidth control unit 106 controls the upper limit bandwidth of the virtual path by changing the bandwidth information and the like of the virtual path stored in the storage unit 102 will be described with reference to FIGS.

  As shown in FIG. 19, the bandwidth control unit 106 changes so as to reduce the upper limit of the SBC virtual path bandwidth stored in the storage unit 102. Since the upper limit of the SBC virtual path bandwidth after the change remains equal to or higher than the accumulated bandwidth, the change is recognized based on the accumulated determination policy, and the bandwidth control unit 106 outputs an information update notification of the successful change. Subsequently, the comparison / determination unit 103 compares the accumulated band with the threshold values of the band in the changed SBC virtual path again, and the alarm unit 105 issues an alarm in accordance with the alarm output policy. In this case, since the accumulated band exceeds the SRV_Multimedia upper limit band, the alarm unit 105 issues an alarm corresponding to the error. Furthermore, the alarm unit 105 belongs across the GN band, the UR band, the UR1 band, and the emergency band, and exceeds “(4) GN threshold”, “(3) UR threshold”, and “(2) UR1 threshold”. The alarm corresponding to each priority is output.

    Next, as shown in FIG. 20, the bandwidth control unit 106 changes so as to reduce the upper limit of the SBC virtual path bandwidth stored in the storage unit 102. Since the upper limit of the SBC virtual path bandwidth after the change is equal to or less than the accumulated bandwidth, the change is not permitted based on the accumulated determination policy, and the bandwidth control unit 106 outputs a change failure information update notification. At this time, the alarm unit 105 does not issue an alarm because threshold comparison is not required according to the alarm determination policy.

(Other embodiments)
As mentioned above, although this invention was described by embodiment of this invention, it should not be understood that the statement and drawing which make a part of this indication limit this invention. From this disclosure, various alternative embodiments, examples and operational techniques will be apparent to those skilled in the art. It goes without saying that the present invention includes various embodiments not described herein. Therefore, the technical scope of the present invention is defined only by the invention specifying matters according to the scope of claims reasonable from the above description.

DESCRIPTION OF SYMBOLS 10 ... Call processing function part 11, 21 ... Resource management apparatus 100, 200 ... Call processing server 101 ... Reception part 102 ... Storage part 103 ... Comparison determination part 104 ... Setting part 105 ... Alarm part 106 ... Band control part

Claims (8)

A plurality of call processing servers through which a plurality of client terminals and a plurality of server terminals respectively establish communication by SIP negotiation, a network relay device that relays IP packets, and a transfer system network managed by the call processing server And a transfer processing device that is located and transfers the IP packet to the terminal, wherein the transfer processing device permits communication between the terminals by allowing the IP packet to flow in and out. A resource management device that assumes one or more functions of a processing server and manages and controls a communication band and a communication path,
A reception unit that receives bandwidth reservation request information that is information related to a bandwidth reservation request that is transmitted when establishing communication by the SIP negotiation;
When the reception unit receives the bandwidth securing request, the bandwidth securing request information including the number of media streams and the bandwidth required for communication between the terminals is stored, and the communication in the physical configuration of the transfer network A storage unit that preliminarily stores, as virtual path information , the number of media streams that can be allowed to communicate between the terminals and the amount of bandwidth regarding the bandwidth and communication path;
Each of the requested bandwidth amounts in the plurality of bandwidth reservation requests based on the result of the SIP negotiation is compared with the upper limit bandwidth amount and the remaining bandwidth amount of the virtual path set on the communication path, and the bandwidth reservation request information includes Only when the requested bandwidth amount does not exceed the upper limit bandwidth amount and the remaining bandwidth amount of the virtual path, the comparison determination unit that determines that the virtual path can accept the bandwidth securing request; and
When the comparison / determination unit determines that the bandwidth securing request is acceptable, policy control and pinholes are performed on the transfer processing device so that the bandwidth can be used based on the result of the SIP negotiation between the terminals. A setting unit for controlling,
An alarm unit that issues an alarm when the requested bandwidth amount included in the bandwidth securing request information exceeds the upper limit bandwidth amount of the virtual path and when the remaining bandwidth amount of the virtual path is exceeded ,
The virtual path information is set for each transport class and each service class, and includes a type of band, a reservation threshold value indicating the size of the band, and a priority among a plurality of bands,
A plurality of bands included in the virtual path information each have a threshold value relating to priority, and the virtual path is configured by sequentially adjacently allocating according to the priority . The comparison determination unit first compares the number of media streams included in the bandwidth reservation request information with the number of media streams included in the virtual path information stored in advance, and subsequently includes the bandwidth reservation request information. The resource management apparatus according to claim 1 , wherein a bandwidth amount is compared with a reservation threshold included in the virtual path information. The comparison / determination unit, when determining the amount of bandwidth necessary for communication between the terminals, sequentially compares, from among the plurality of bands constituting the virtual path information, the band with the lowest priority. The resource management apparatus according to claim 1 or 2 . The comparison / determination unit sequentially compares a bandwidth amount necessary for communication between the terminals with a reservation threshold included in the virtual path information, in order from the lower priority band among a plurality of bands constituting the virtual path. The resource management apparatus according to claim 1 or 2 , wherein comparison is performed. The comparison determination unit compares the amount of bandwidth necessary for communication between the terminals with an upper limit bandwidth amount in a first band that is the lowest priority band among a plurality of bands constituting the virtual path,
If the bandwidth required for communication between the terminals has already exceeded the upper limit bandwidth in the first bandwidth, the upper limit bandwidth in the second bandwidth having the second lowest priority after the first bandwidth; Compare and
If the bandwidth required for communication between the terminals has not yet exceeded the upper limit bandwidth in the first bandwidth, the total bandwidth required for communication between the terminals is added to the existing bandwidth used. The resource management device according to any one of claims 1 to 3 , wherein a bandwidth amount is compared with an upper limit bandwidth amount in the first bandwidth. The comparison determination unit, when comparing the total amount of bandwidth obtained by adding the amount of bandwidth necessary for communication between the terminals to the existing amount of bandwidth used and the upper limit amount of bandwidth in the first band,
When the total bandwidth exceeds the upper limit bandwidth in the first bandwidth and the bandwidth priority included in the bandwidth reservation request information is the same as that in the first bandwidth, the alarm unit transmits the first bandwidth. And issuing a special alarm, the comparison and determination unit determines to reject the bandwidth reservation request,
When the total band amount exceeds the upper limit band amount in the first band and the priority of the band included in the band securing request information is different from the first band, the alarm unit transmits the first band. The resource management apparatus according to claim 5 , wherein an alarm specific to the second band is issued, and the comparison determination unit compares the total band amount with an upper limit band amount in the second band. The bandwidth reservation request information and the virtual path information stored in the storage unit are managed as communication resources,
The comparison / determination unit virtually uses the number of media streams that can be communicated between the terminals, a link virtual path obtained by virtualizing the physical link bandwidth between the terminals as the communication resource, and the processing capability between the terminals as the communication resource. resource management device according to any one of claims 1 to 5, wherein the comparing determines the reserved threshold and bandwidth availability in the order of phased process virtual path. A plurality of call processing servers through which a plurality of client terminals and a plurality of server terminals respectively establish communication by SIP negotiation, a network relay device that relays IP packets, and a transfer system network managed by the call processing server And a transfer processing device that is located and transfers the IP packet to the terminal, wherein the transfer processing device permits communication between the terminals by allowing the IP packet to flow in and out. A resource management method that assumes one or more functions of a processing server and manages and controls a communication band and a communication path,
Receiving a bandwidth securing request information that is information related to a bandwidth securing request that is transmitted when establishing a communication through the SIP negotiation;
A storage unit stores the bandwidth reservation request information including the number of media streams and the amount of bandwidth required for communication between the terminals when the receiving unit receives the bandwidth reservation request, and stores the bandwidth reservation request information Regarding the communication band and communication path in the configuration, the step of preliminarily storing, as virtual path information, the information on the number of media streams and the amount of the band that can allow communication between the terminals;
The comparison determination unit compares each requested bandwidth amount in the plurality of bandwidth securing requests based on the result of the SIP negotiation with the upper limit bandwidth amount and the remaining bandwidth amount of the virtual path set on the communication path, and the bandwidth Determining that the virtual path can accept the bandwidth reservation request only when the requested bandwidth amount included in the reservation request information does not exceed the upper limit bandwidth amount and the remaining bandwidth amount of the virtual path;
When the setting unit determines that the comparison and determination unit can accept the bandwidth securing request, a policy is set for the transfer processing device so that the bandwidth can be used based on a result of the SIP negotiation between the terminals. Performing control and pinhole control;
Alarm unit, required amount of bandwidth the bandwidth reservation request information is included in, you see contains a step of issuing an alarm upon exceeding the remaining amount of bandwidth when and the virtual path has exceeded the upper limit bandwidth of the virtual path,
The virtual path information is set for each transport class and each service class, and includes a type of band, a reservation threshold value indicating the size of the band, and a priority among a plurality of bands,
A plurality of bands included in the virtual path information each have a threshold value relating to priority, and the virtual path is configured by sequentially adjacently allocating according to the priority .

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