JP5432811B2 - Wireless communication system and gateway device - Google Patents

Description

  The present invention relates to a radio communication system that allocates a band to each radio terminal.

  In recent years, research and standardization activities for the 3.9th generation mobile communication system have been promoted as a method for realizing higher speed and higher quality of mobile radio communication. In LTE (Long Term Evolution), which is one of the 3.9th generation mobile communication systems, as a parameter for setting a maximum bandwidth for a best effort service without performing bandwidth guarantee, Non-Patent Document 1 describes a user and a service unit. Defines APN-AMBR. Maximum bandwidth control based on APN-AMBR (Access Point Name-Aggregate Maximum Bit Rate) is performed by the gateway in the downlink direction and by the mobile station and the gateway in the uplink direction.

JP 2002-217815 A (Japanese Patent Application No. 2001-7313)

3GPP TS 23.401 V9.1.0, (2009-6), Technical Specification

However, the maximum bandwidth value of a mobile communication system such as APN-AMBR is set based on the policy of each service, and the bandwidth information of the wireless section is notified to the gateway and used for setting the maximum bandwidth. Is not specified. Therefore, the same maximum bandwidth as that of a mobile station with a high reception strength is set for a mobile station with a low reception strength.
On the other hand, in a base station, a method of assigning a time slot of each mobile station in consideration of band information of a radio section such as reception strength of the mobile station is disclosed in Patent Document 1 and the like. However, as shown in the protocol stack of FIG. 17 shown also in Non-Patent Document 1 (see Non-Patent Document 1 for details), a protocol layer 1701 for assigning a time slot in a radio section and a maximum bandwidth are set by a gateway. Since the protocol layer 1702 is different, a method of notifying the gateway of the band information of the wireless section is not considered.
In the maximum bandwidth allocation of each mobile station in the gateway that does not consider the bandwidth information of the radio section, in the case of a mobile station with low reception strength, the downlink packet is notified from the gateway to the base station, but not from the base station to the mobile station Since there is a case where it cannot be performed, there is a high possibility that the base station will discard the packet due to overflow of the packet buffer. As a result, there is a difference between the number of transmitted bytes charged by the gateway and the number of bytes actually received by the mobile station, which may result in erroneous charging (excess charging), and a configuration that avoids erroneous charging is necessary. .
In addition, in the maximum bandwidth allocation of each mobile station in the gateway that does not consider the bandwidth information of the wireless section, packets that can be transmitted from the gateway to the base station but cannot be transmitted from the base station to the mobile station are generated. The utilization efficiency of resources in the station section is lowered, and the possibility of congestion is increased.
In addition, in the maximum bandwidth allocation of each mobile station in the gateway that does not consider the bandwidth information of the radio section, the mobile station with low reception strength also makes an excessive bandwidth request according to the maximum bandwidth in the uplink direction of each mobile station notified from the gateway. In some cases, the utilization efficiency of resources in the wireless section may be reduced.

In the conventional technology, the resource allocation in the radio section has been performed by scheduling based on the policy of the base station, and therefore, the schedule allocation policy of the base station may not necessarily match the service policy. For example, if a gateway wants to allocate more bandwidth to a terminal with higher priority based on the service policy, but the reception strength of the terminal with higher priority is low, the scheduler of the base station uses the cell policy based on the policy of the base station. In order to increase the throughput of the terminal, it may occur that a packet of a terminal with a high priority is sacrificed. Conversely, the gateway wants to prioritize cell throughput rather than assigning more bandwidth to higher priority terminals based on service policies, but if the reception strength of the higher priority terminals is low, the base station scheduler Even if the cell throughput is sacrificed based on the policy of the base station, it may occur that many resources are allocated to a packet of a terminal with high priority. In particular, in the case of a gateway connected to a base station of multiple vendors, the resource allocation policy of each base station may be different, and each base station schedules with its own policy. There is a high probability that the policy will not match.
In view of the above points, the present invention is based on band information of a radio section between a base station and a mobile station when a maximum bandwidth is allocated to each mobile station in a cell of the base station where the gateway is located in a wireless communication system. An object is to allocate a maximum bandwidth to each mobile station belonging to the base station. Another object of the present invention is to avoid a discrepancy between the maximum bandwidth of each terminal assigned by the gateway and the bandwidth of the radio section between the base station and a terminal belonging to the base station.

The wireless communication system of the present invention has a maximum bandwidth for each terminal or user and service unit of each terminal in communication between a base station (BS) and a mobile station (MS) and between a base station and a gateway (BCGW). One of the characteristics is that it has a maximum bandwidth allocation function that is set based on the bandwidth information of the wireless section between the terminal and the base station that passes through the terminal. Further, the wireless communication system of the present invention sets the maximum bandwidth of each terminal or user and service unit of each terminal in communication between the base station and the mobile station and between the base station and the gateway. One of the features is that based on the bandwidth information of the wireless section with the passing base station, the total amount of the maximum bandwidth allocated to all terminals belonging to the base station is set, and the maximum bandwidth allocation function based on the total amount is provided. To do.
For example, in this wireless communication system, the maximum bandwidth between the base station and the terminal and between the base station and the gateway assigned to each terminal belonging to a predetermined base station based on the wireless zone bandwidth information collected from the base station and the terminal by the gateway Set. Also, for example, the maximum bandwidth between the base station and the terminal and between the base station and the gateway assigned to each terminal connected to the predetermined service may be set based on the band information of the wireless section collected by the gateway from the base station or the terminal. Good. For example, a gateway assigns to each terminal connected to a specific service among terminals belonging to a predetermined base station based on band information of a radio section collected from the base station or terminal, and between the base station and the gateway A maximum bandwidth may be set.

Further, in the present wireless communication system, for example, the gateway sets the total amount of maximum bandwidth to be allocated to terminals belonging to a predetermined base station based on the wireless zone bandwidth information collected from the base stations and terminals. Note that the gateway may set the total amount of maximum bandwidth allocated to all terminals connected to a specific service among terminals belonging to a predetermined base station based on the band information of the wireless section collected from the base station and terminals. .
For example, based on the total amount of maximum bandwidth allocated to a terminal belonging to a predetermined base station, which is obtained by the gateway according to the above-described method, the base station to the terminal allocated to each terminal belonging to the base station as described above, and A maximum bandwidth between the base station and the gateway may be set. Further, based on the total amount of maximum bandwidth allocated by the gateway to all terminals connected to a specific service among the terminals belonging to the predetermined base station obtained by the above method, the base station The maximum bandwidth between the base station and the terminal and between the base station and the gateway assigned to each terminal connected to the service among the terminals belonging to the service may be set.
As the band information of the above-described wireless section, for example, the reception strength of the terminal or its index (CQI: Channel Quality Indicator) can be used. Further, the transmission waiting packet buffer amount of the base station may be used as the band information of the wireless section.
The base station notifies the gateway of the band information of the wireless section described above. Moreover, you may use the statistical item acquisition server which acquires the band information of the above-mentioned radio | wireless area from a base station, and notifies to a gateway.

According to the first solution of the present invention,
In a wireless communication system comprising one or more base stations that communicate wirelessly with a wireless terminal, and a gateway device that transmits packets to the wireless terminal via the base station according to a maximum bandwidth allocated to the wireless terminal,
The gateway device is
A preset total amount of maximum bandwidth allocated to a wireless terminal belonging to a predetermined base station or service, and a first bandwidth of a wireless section between the base station and the wireless terminal collected from the base station or the wireless terminal Based on the information, each wireless terminal is assigned a maximum bandwidth between the base station and the wireless terminal and between the base station and the gateway device, or
Based on the second band information of the wireless section between the base station and the wireless terminal collected from the base station or the wireless terminal, the total amount of maximum bandwidth allocated to the wireless terminal belonging to the predetermined base station or service is The wireless communication system, which is set for each station or service, and allocates the maximum bandwidth between the base station and the wireless terminal and between the base station and the gateway device to each wireless terminal belonging to the base station based on the total amount of the set maximum bandwidth Is provided.

According to the second solution of the present invention,
The gateway in a wireless communication system comprising one or more base stations that communicate wirelessly with a wireless terminal and a gateway device that transmits packets to the wireless terminal via the base station according to a maximum bandwidth allocated to the wireless terminal A device,
An interface for communicating with the base station;
Each wireless terminal includes a processing unit that allocates the maximum bandwidth between the base station and the wireless terminal and between the base station and the gateway device,
The processor is
A preset total amount of maximum bandwidth allocated to a wireless terminal belonging to a predetermined base station or service, and a first bandwidth of a wireless section between the base station and the wireless terminal collected from the base station or the wireless terminal Based on the information, each wireless terminal is assigned a maximum bandwidth between the base station and the wireless terminal and between the base station and the gateway device, or
Based on the second band information of the wireless section between the base station and the wireless terminal collected from the base station or the wireless terminal, the total amount of maximum bandwidth allocated to the wireless terminal belonging to the predetermined base station or service is The gateway device that is set for each station or for each service and that assigns the maximum bandwidth between the base station and the wireless terminal and between the base station and the gateway device to each wireless terminal belonging to the base station based on the set maximum bandwidth Provided.

  According to the present invention, in a wireless communication system, when a maximum bandwidth is allocated to each mobile station in a cell of a base station with a gateway, the base station is assigned with the base station based on bandwidth information of a wireless section between the base station and the mobile station. A maximum bandwidth can be assigned to each mobile station to which it belongs. Further, according to the present invention, it is possible to avoid a discrepancy between the maximum bandwidth of each terminal assigned by the gateway and the bandwidth of the radio section between the base station and the terminals belonging to the base station.

An example of a mobile radio communication system having a maximum bandwidth allocation function based on CQI and a maximum bandwidth total amount setting function based on a BS buffer amount. An example of a mobile radio communication system having a maximum bandwidth allocation function based on CQI. An example of a block diagram of a gateway. An example of the block diagram of a base station. An example of a table (UP-based maximum bandwidth ratio table) held by a gateway having a maximum bandwidth allocation function. An example of a table (maximum bandwidth table for each MS) held by a gateway having a maximum bandwidth allocation function. An example of a table (maximum bandwidth table for each CQI) held by a gateway having a maximum bandwidth allocation function based on CQI. An example of a table (CQI table for each MS) held by a base station having a maximum bandwidth allocation function based on CQI. An example of the flowchart of the maximum bandwidth allocation function based on the user priority in a gateway. An example of the flowchart of the maximum bandwidth allocation function based on CQI in a gateway. An example of the mobile radio | wireless communications system which has the maximum band total amount setting function based on the buffer amount of BS. An example of a table (UP-based maximum bandwidth ratio table) held by a gateway having a maximum bandwidth total amount setting function. An example of a table (maximum bandwidth table for each MS) held by a gateway having a maximum bandwidth total amount setting function. An example of a table (maximum bandwidth total increase / decrease amount table) held by a gateway having a maximum bandwidth total amount setting function based on a BS buffer amount. An example of a table (transmission waiting packet buffer amount table) held by a base station having a maximum bandwidth total amount setting function based on a BS buffer amount. An example of the flowchart of the maximum band total amount setting function based on the buffer amount of BS in the gateway. An example of the protocol stack of a mobile radio communication system.

1. Overview FIG. 1 is an example of a mobile radio communication system having a maximum bandwidth allocation function based on CQI and a maximum bandwidth total amount setting function based on a BS buffer amount. This system will be described in detail in the third embodiment. First, an outline of each embodiment will be described with reference to FIG.
One of the embodiments of the present invention is that in a mobile radio communication system, between base stations (hereinafter referred to as BS) 4 to MS 6 and between BS 4 and gateway devices (hereinafter referred to as MS: Mobile Station) 6 in a mobile radio communication system. In the present specification, it may be simply referred to as a gateway.Hereinafter, BCGW2 which allocates the maximum bandwidth between 2 (BCGW: Bandwidth Control Gateway) collects band information between BS4 and MS6 (wireless section). Based on this, a system capable of setting the maximum bandwidth allocated to each MS 6 is provided.
As an example of band information between BS4 and MS6, a case in which the maximum band allocated to each MS6 is set using CQI (Channel Quality Indicator), which is an index of the reception strength of MS6, will be described in the first embodiment. An example in which the maximum bandwidth allocated to each MS 6 is set based on other information corresponding to the bandwidth of the wireless section will be described as a modification.

In another embodiment of the present invention, in the mobile radio communication system, the BCGW 2 that allocates the maximum bandwidth between the BS 4 to the MS 6 and the BS 4 to the BCGW 2 of each MS 6 is between the collected BS 4 to the MS 6. Provided is a system capable of setting a total amount of maximum bandwidth allocated to all MSs 6 belonging to a service provided to a certain BS 4 or MS 6 based on bandwidth information.
As an example of band information between BS4 and MS6, a case in which the total amount of the maximum band allocated to all MSs 6 belonging to a certain BS4 is set in the second embodiment using the transmission waiting packet buffer amount of BS4. Further, an example in which the total amount of the maximum bandwidth allocated to all the MSs 6 belonging to a certain BS 4 is set based on other information corresponding to the bandwidth of the wireless section will be shown as a modification.
Also, one of the embodiments of the present invention is that, in the mobile radio communication system, the BCGW 2 that allocates the maximum band between the BS 4 to the MS 6 and the BS 4 to the BCGW 2 of each MS 6 collects the band information between the BS 4 to the MS 6. Based on the (second band information), the total amount of the maximum band to be allocated to all the MSs 6 belonging to the BS 4 is set, and allocated to each MS 6 based on the collected band information (first band information) between the BS 4 and the MS 6 Provide a system that can set the maximum bandwidth.
As an example in which the total amount setting of the maximum bandwidth based on the bandwidth information between BS4 and MS6 and the allocation of the maximum bandwidth based on the bandwidth information between BS4 and MS6 are used together, the first embodiment and the second embodiment A case of combining these will be described in a third embodiment.
Note that the system of each embodiment is not limited to mobile communication, and may be a wireless communication system having a wireless section.
Further, in each embodiment, the maximum bandwidth allocated by the BCGW 2 can be set in any unit of MS6 units or MS6 and service units. When the maximum bandwidth is set for each MS 6 and service unit, the maximum bandwidth is controlled independently for each service network to which the MS 6 is connected, and is handled as independent communication paths by the service network to which the same MS 6 is connected.
In each embodiment, when the BCGW 2 acquires the band information between the BS 4 and the MS 6, the BCGW 2 is not only notified directly from the BS 4 but also an external device (statistic item acquisition server, hereinafter referred to as OAM 7) having a statistical item acquisition function. : Operation And Maintenance).
In each embodiment, allocation of the maximum bandwidth of each MS 6 is made in addition to bandwidth information between the BS 4 and the MS 6, in addition to a priority for each user based on a service policy (hereinafter referred to as UP: User Priority). It may be set in consideration. Policy information including UP of each MS 6 and weighting of maximum bandwidth allocation based on UP is set in BCGW 2 in advance, or is obtained from a policy management server (hereinafter referred to as PS 3: Policy Server).

2. First Embodiment The first embodiment relates to maximum bandwidth allocation based on CQI, and allocation of maximum bandwidth between BS4 to MS6 of MS6 and between BS4 to BCGW2 in BCGW2 based on CQI of each MS6 An example is shown.
In the present embodiment, in a wireless communication system, when a maximum bandwidth is allocated to each mobile station in a cell of a base station with a gateway, the base station is based on bandwidth information of a wireless section between the base station and the mobile station. The maximum bandwidth can be assigned to each mobile station belonging to the. Further, in the present embodiment, it is possible to avoid a discrepancy between the maximum bandwidth of each terminal assigned by the gateway and the bandwidth of the radio section between the base station and the terminals belonging to the base station.

2-1. System Configuration [Example of Architecture of Mobile Radio Communication System of this Embodiment]
FIG. 2 shows an example of the architecture of the mobile radio communication system of the present embodiment.
The mobile radio communication system includes, for example, a gateway (BCGW2) 2 and a base station (BS4) 4. One or more terminals (MS 6, mobile stations) 6 exist in the radio communication range 5 of the base station 4. The mobile radio communication system may further include a maintenance management device (OAM7) 7 and a policy control device (PS3, policy server) 3 that acquire statistical items. Note that OAM7 and PS3 may be omitted.
The BCGW 2 is connected to an IP (IP: Internet Protocol) network 1, a PS 3, a BS 4, and an OAM 7. The BCGW 2 acquires the CQI of each MS 6 from the BS 4 or the OAM 7 and has a function of allocating the maximum bandwidth between the BS 4 to the MS 6 of each MS 6 and between the BS 4 to the BCGW 2 based on the CQI of each MS 6. Further, the BCGW 2 transmits / receives control signals and data to / from the IP network 1, PS3, BS4, and OAM7. The BCGW 2 transmits a packet corresponding to a predetermined service to the MS 6 via the BS 4 according to the determined maximum band of the MS 6. Note that PS3 can be omitted when policy information is preset in BCGW2. Further, when the BCGW 2 acquires the CQI directly from the BS 4, the OAM 7 can be omitted.
PS3 is connected to BCGW2, and manages information such as UP of each MS6 used for maximum bandwidth allocation of each MS6 and weighting of maximum bandwidth allocation based on UP as policy information. PS3 also controls BCGW2 and control signals and Send and receive data. When the policy information is preset in the BCGW 2, PS3 can be omitted.

The BS 4 is connected to the BCGW 2 and the OAM 7 and transmits / receives control signals and data to / from the BCGW 2 and the OAM 7 and the MS 6 within its own wireless communication range 5. For example, the BS 4 notifies the BCGW 2 or the OAM 7 of information used when the BCGW 2 obtains the band information of the radio section between the BS 4 and the MS 6 or the band information of the radio section. As described above, when the BCGW 2 obtains the CQI directly from the BS 4, the OAM 7 can be omitted.
The MS 6 transmits / receives control signals and data to / from the BS 4 capable of wireless communication.
The OAM 7 is an external device that is connected to the BCGW 2 and the BS 4 and acquires the statistical items of the BS 4. The OAM 7 transmits / receives control signals and data to / from the BCGW 2 and the BS 4. The statistical items to be acquired can be determined in advance. As described above, when the BCGW 2 obtains the CQI directly from the BS 4, the OAM 7 can be omitted.

2-2. Device configuration 2-2-1. BCGW2
[An example of BCGW2 of the present embodiment]
FIG. 3 shows an example of a functional block diagram of BCGW 2 used in the present embodiment.
The BCGW 2 includes, for example, a network interface unit 21, a BS interface unit 22, a PS interface unit 23, an OAM interface unit 24, a memory unit 25, and a processing unit 26.
The network interface unit 21 is an interface with the IP network 1. With the network interface unit 21, the BCGW 2 transmits and receives IP packets to and from the IP network.
The BS interface unit 22 is an interface with the BS 4. With the BS interface unit 22, the BCGW 2 transmits and receives IP packets to and from the BS 4. In the present embodiment, the BCGW 2 receives the CQI from the BS 4 by the BS interface unit 22 or receives the CQI from the OAM 7 by the OAM interface unit 24.
The PS interface unit 23 is an interface with PS3. With the PS interface unit 23, the BCGW 2 transmits and receives IP packets with the PS3. In the present embodiment, the BCGW 2 is assigned from the PS 3 by the PS interface unit 23, for example, the user identifier of each MS 6, the UP of each MS 6, the initial value of the total maximum bandwidth in each service, and the maximum bandwidth allocation corresponding to each UP in each service It is possible to receive information on policies such as ratio and maximum bandwidth corresponding to each CQI. In the case of an architecture in which PS3 is omitted by setting policy-related information in BCGW2 or being notified to BCGW2 from another appropriate node, PS interface unit 23 can be omitted.
The OAM interface unit 24 is an interface with the OAM 7. With the OAM interface unit 24, the BCGW 2 transmits and receives IP packets to and from the OAM 7. In the present embodiment, the BCGW 2 receives the CQI from the BS 4 by the BS interface unit 22 or receives the CQI from the OAM 7 by the OAM interface unit 24. When the CQI is notified directly from the BS 4 to the BCGW 2, the OAM interface unit 24 can be omitted.
The memory unit 25 stores and manages information such as an IP packet to be transmitted / received, an address of the PS 3 to be connected, an address of the BS 4 to be connected, an address of the OAM 7 to be connected, a user identifier of each MS 6 as necessary. In the present embodiment, the memory unit 25 has, for example, a maximum bandwidth ratio table for each UP, a maximum bandwidth table for each MS, and a maximum bandwidth table for each CQI. , The maximum bandwidth allocation ratio corresponding to each UP in each service, the maximum bandwidth corresponding to each CQI, the maximum bandwidth currently allocated to each MS 6 in each service, and the like can be managed. Details of each table will be described later.
The processing unit 26 performs management of information held in the memory unit 25, IP packet transmission / reception processing such as construction and analysis of IP packets, and the like. In addition, the processing unit 26 allocates the maximum bandwidth between BS4 and MS6 and between BS4 and BCGW2 to each MS6. For example, in this embodiment, the maximum bandwidth value of each MS 6 is calculated based on UP or CQI in each service.

[An example of information held in the memory unit of the BCGW 2 of the present embodiment]
FIG. 5 shows a maximum bandwidth ratio table for each UP as an example of information held in the memory unit of the BCGW 2 according to the present embodiment.
The maximum bandwidth ratio table for each UP stores, for example, the total amount of maximum bandwidth and the maximum bandwidth ratio for each UP corresponding to the service identifier.
The service identifier is an identifier of a service provided by the IP network 1 to which the BCGW 2 is connected. The total amount B of the maximum bandwidth is a total amount of the maximum bandwidth that is preset for each service unit and assigned to each MS 6. The maximum bandwidth ratio R _i is a value representing the maximum bandwidth allocated to the MS 6 with UP = i as a ratio for each UP.
FIG. 6 shows an MS-specific maximum bandwidth table for a certain service as an example of information held in the memory unit of the BCGW 2 according to the present embodiment.
The MS-specific maximum bandwidth table stores, for example, user priority (UP) and maximum bandwidth corresponding to the user identifier. The MS maximum bandwidth table can be provided for each service.
The user identifier is an identifier of MS6. It may be an identifier of a user who uses MS6. UP is a value indicating the level of priority assigned to each user. For example, the smaller the value, the higher the priority. The maximum bandwidth indicates the maximum bandwidth allowed when the MS 6 corresponding to each user identifier connects to a desired service. The maximum bandwidth value obtained by the calculation of the processing unit 26 of the BCGW 2 is stored, and the value is subsequently updated when the maximum bandwidth is recalculated.

FIG. 7 shows a CQI-specific maximum bandwidth table for a certain service as an example of information held in the memory unit of the BCGW 2 according to the present embodiment.
In the CQI-specific maximum bandwidth table, for example, CQI and maximum bandwidth are stored in association with each other.
CQI is an index indicating the reception strength of each MS 6. For example, the smaller the value, the lower the reception strength. The maximum bandwidth indicates the maximum bandwidth allowed when the MS 6 having each CQI is connected to the service. The maximum bandwidth that BCGW2 actually uses for maximum bandwidth control is determined by comparing this value with the maximum bandwidth value obtained by calculation of the processing unit 26 of BCGW2.
These pieces of information can be received and stored in advance from the PS3, for example.

2-2-2. BS4
[An example of BS4 of this embodiment]
FIG. 4 shows an example of a functional block diagram of the BS 4 used in the present embodiment.
The BS 4 includes, for example, a wireless interface unit 41, a BCGW interface unit 42, an OAM interface unit 43, a memory unit 44, a processing unit 45, and a battery unit 46.
The wireless interface unit 41 is a wireless interface. The wireless interface unit 41 allows the BS 4 to transmit and receive IP packets with the MS 6. In the present embodiment, the BCGW 2 transmits a pilot signal from the BS 4 to the MS 6 by the wireless interface unit 41 and measures the CQI of the MS 6 from the response of the MS 6. The BCGW interface unit 42 is an interface with the BCGW 2. With the BCGW interface unit 42, the BS 4 transmits and receives IP packets to and from the BCGW 2. The OAM interface unit 43 is an interface with the OAM 7. The OAM interface unit 43 causes the BS 4 to transmit and receive IP packets with the OAM 7. In the present embodiment, the BS 4 transmits the CQI to the BCGW 2 by the BCGW interface unit 42 or transmits the CQI to the OAM 7 by the OAM interface unit 43. When the CQI is notified directly from the BS 4 to the BCGW 2, the OAM interface unit 43 can be omitted.
The memory unit 44 stores and manages information such as IP packets to be transmitted / received, the address of the connected BCGW 2, the address of the MS 6 to be connected, and the like. In the present embodiment, the memory unit 44 has, for example, a MS-specific CQI table, and manages information such as CQI of each MS 6. The processing unit 45 performs management of information held in the memory unit 44, IP packet transmission / reception processing such as construction and analysis of IP packets, and the like. The battery unit 46 is a battery of BS4. When the BS 4 is always supplied with power, the battery unit 46 can be omitted.

[An example of information held in the memory unit of the BS 4 of this embodiment]
FIG. 8 shows an MS-specific CQI table as an example of information held in the memory unit of the BS 4 of the present embodiment.
The MS-specific CQI table stores, for example, the CQI of the MS 6 corresponding to the user identifier. The user identifier is the same as described above, for example, the identifier of MS6. CQI is an index indicating the reception strength of each MS 6. For example, the smaller the value, the lower the reception strength.

2-3. Maximum Bandwidth Allocation [Example of Maximum Bandwidth Allocation by BCGW2 Before Obtaining CQI of this Embodiment]
The BCGW 2 can assign an initial value of the maximum bandwidth of each MS 6 based on the service policy before obtaining the CQI. Hereinafter, several examples of setting the initial value of the maximum bandwidth of each MS 6 will be described. However, the present invention is not limited to this, and may be set based on an appropriate policy.
When the initial value of the maximum bandwidth of each MS 6 that is allowed to provide a service is preset in the BCGW 2 or notified from the PS 3, the BCGW 2 sets the value to each MS 6 that is allowed to provide the service. It may be used as an initial value of the maximum bandwidth.
In addition, when the information on the total amount of the maximum bandwidth of all the MSs 6 connected to a certain service is preset in BCGW2 or notified from PS3, BS4, and OAM7, BCGW2 is connected to the maximum amount of bandwidth and the service. The initial value of the maximum bandwidth of each MS 6 may be set based on the number of MS 6 to perform.
In addition, when the information on the total amount of the maximum bandwidth of all the MSs 6 connected to a certain base station is preset in BCGW2 or notified from PS3, BS4, OAM7, BCGW2 The initial value of the maximum bandwidth of each MS 6 may be set based on the number of MSs 6 connected to.
In addition, when the initial value of the maximum bandwidth for each UP is preset in the BCGW 2 or notified from the PS 3 together with the UP of each MS 6, the BCGW 2 is allowed to provide services based on the UP. The initial value of the maximum bandwidth of the MS 6 may be set to a larger value than the MS 6 having a low UP, for example, the MS 6 having a high UP.
In addition, the BCGW 2 is preconfigured in the BCGW 2 with the maximum bandwidth allocation weight R _i for each UP together with the UP of each MS 6 and the total amount B of the maximum bandwidth of all the MSs 6 connected to the service, or PS3, BS4 When notified from the OAM 7, the initial value of the maximum bandwidth of each MS 6 may be set based on the total amount of the maximum bandwidth and the number of MSs 6 having each UP among the MSs 6 connected to the service.
In addition, the BCGW 2 is preconfigured in the BCGW 2 with the weight of the maximum bandwidth allocation for each UP together with the UP of each MS 6 and the total amount of the maximum bandwidth of all the MSs 6 connected to the base station, or PS3, BS4, OAM7 May be set, the initial value of the maximum bandwidth of each MS 6 may be set based on the total amount of the maximum bandwidth and the number of MSs 6 having each UP among the MSs 6 connected to the base station.
Also, the BCGW 2 is preconfigured in the BCGW 2 with the weight of the maximum bandwidth allocation for each UP along with the UP of each MS 6 and the total amount of the maximum bandwidth of all the MSs 6 connected to the base station, or PS3, BS4, OAM7 , Based on the total amount of the maximum bandwidth and the number of MSs 6 having each UP among the MSs 6 connected to the service among the MSs 6 connected to the base station, An initial value for the maximum bandwidth may be set.
FIG. 9 shows an example of BCGW2 processing in maximum bandwidth allocation. An example of processing in the case where the information on the maximum bandwidth allocation weight R _i for each UP and the total amount B of the maximum bandwidth of all the MSs 6 connected to the service is set or notified together with the UP of each MS 6 described above Is described below.

For example, the BCGW 2 includes a maximum bandwidth ratio table for each UP including a service identifier X, a total amount B of maximum bandwidths of all MSs 6 connected to the service X, and a weight (ratio) R _i of maximum bandwidth allocation for UP = i in the service X. Referring to the MS-specific maximum bandwidth table including the identifier of each MS 6 connected to the service X and the UP = i of each MS 6 connected to the service X, obtain the reference value B ₀ of the maximum bandwidth allocated to each MS 6 and UP = i Set the maximum bandwidth of MS6 with R _i B ₀ . BCGW2 In S221 of FIG. 9, BCGW2 (for example, the processing unit 26, which is the same in the description of the flowchart below) determines the MS6 having UP = i among all the MS6 connected to the service X based on the information of the MS-specific maximum bandwidth table. The number N _i is determined by counting for each UP.
In S222, the BCGW 2 sets the reference value B ₀ of the maximum bandwidth allocated to each MS 6 based on the following formula based on the N _{i of} the count result and B and R _i of the maximum bandwidth ratio table by UP.
[Formula 1]
B ₀ = B / ΣR _i N _i
Here, Σ is an arithmetic symbol representing the sum related to i (sum related to all UPs).
In S223, the BCGW 2 sets the maximum bandwidth of the MS 6 having UP = i based on B ₀ obtained in S222 to R _i B ₀ and stores it in the MS-specific maximum bandwidth table. The stored maximum bandwidth is used for maximum bandwidth control in the downlink direction in BCGW2. Further, the maximum bandwidth in the uplink direction may be obtained in the same manner and used for the maximum bandwidth control in the uplink direction in BCGW2. Further, the maximum bandwidth in the uplink direction, the downlink direction, or the uplink and downlink directions obtained by the same method may be notified to the BS 4 or the MS 6, and the maximum bandwidth control may be performed by the BS 4 or the MS 6 based on the notified value. . Examples of the maximum bandwidth control method include rate shaping by queuing using a shaping queue and rate policing for discarding packets exceeding the maximum bandwidth, but other methods may be used.
The maximum bandwidth R _i B ₀ set by this method satisfies the total maximum bandwidth of all the MSs 6 connected to the service X = B, and the maximum bandwidth allocation for UP = i in the service X to the MS 6 having each UP weight (ratio) satisfies the condition of _{R i.}

[Example of BCGW2 processing in maximum bandwidth allocation based on CQI of this embodiment]
FIG. 10 shows an example of BCGW2 processing in the maximum bandwidth allocation.
In S201, the BCGW 2 receives the user identifier and CQI of each MS 6 from the BS 4 or the OAM 7. The BS 4 can measure the CQI of the MS 6 by transmitting a pilot signal to the MS 6 and acquiring the reception strength from the MS 6. The OAM 7 may acquire the CQI of each MS 6 from the BS 4 as a statistical item. Thereby, BCGW2 can acquire CQI of each MS6 from BS4 or OAM7. The BCGW 2 may acquire CQIs of all MSs 6, may acquire only CQIs of MS 6 having a CQI lower than a predetermined threshold, or MS 6 having a CQI higher than the upper threshold and MS 6 having a lower CQI lower than the lower threshold. Only CQI may be acquired. The upper threshold and the lower threshold can be determined in advance. When using a threshold value, all MSs 6 that have reached the threshold condition may be CQI acquisition targets, or MS 6 that satisfy the threshold condition for a certain time or more may be CQI acquisition targets. For example, this is the case when the reception strength is low. In addition, all the MSs 6 that have notified the CQI while satisfying the threshold condition but no longer satisfy the threshold condition, or the MS 6 that has been notified of the CQI by satisfying the threshold condition but have not satisfied the threshold condition have continued for a certain period of time. It may be a CQI acquisition target. These correspond to, for example, the case where the reception intensity once decreased but recovered. In addition, when acquiring only the CQI of a specific MS 6 according to a certain threshold, the threshold may be set to BS4, or when BCGW2 acquires CQI from OAM7, it may be set to OAM7 or set to BCGW2. You may determine according to a threshold value from the notified CQI. Further, examples of the opportunity for the BCGW 2 to acquire the CQI include MS6 location registration / area change / handover, periodic notification by a timer, acquisition of the CQI of the MS6 that is the CQI acquisition target exemplified when the above threshold is used, and the like. Can be mentioned. In addition, the threshold value may be notified to the BS 4 or the OAM 7 by the BCGW 2 that is preset in the BCGW 2 or acquired from the PS 3, or may be preset in the BS 4 or the OAM 7. Moreover, CGW acquisition of BCGW2 may be performed independently for each BS4 unit, service unit, or BS4 and service unit.
In S202, the BCGW 2 obtains the maximum bandwidth B _rj corresponding to the acquired CQI of the MS 6 based on the CQI-specific maximum bandwidth table indicating the correspondence between the CQI and the maximum bandwidth allocated to the MS 6. The correspondence relationship between the CQI in the CQI maximum bandwidth table and the maximum bandwidth allocated to the MS 6 may be preset in the BCGW 2 or may be acquired from the PS 3. Further, as the table of the maximum bandwidth table for each CQI, different tables may be set for each BS4 unit, each service unit, each BS4 and each service unit, or a common table may be used.

In S203, the BCGW 2 compares the maximum bandwidth B _rj corresponding to the CQI of the MS 6 obtained in S202 with the maximum bandwidth currently allocated to the MS 6. Note that the maximum bandwidth allocated to the MS 6 can be identified by referring to the MS-specific maximum bandwidth table based on the received user identifier. The operation of BCGW2 corresponding to this comparison result is as follows: MS6 whose CQI is lower than the lower threshold or higher than the upper threshold, MS6, and MS6 that is higher than the upper threshold or lower than the lower threshold, MS6 The reverse is true. Hereinafter, the former case will be described as an example. In addition, the BCGW 2 can perform the operation of reallocating the maximum bandwidth allocated before allocating the maximum bandwidth corresponding to the CQI without performing the above comparison for the MS 6 that does not satisfy the threshold condition.
When the maximum bandwidth currently allocated to the MS 6 is smaller than the maximum bandwidth B _rj corresponding to the CQI of the MS 6 obtained in S202 (FIG. 10, S203: No route), the BCGW 2 determines the maximum bandwidth of the MS 6 in S204N. The process proceeds to S205 without changing. At this time, the BS 4 or OAM 7 that has notified the CQI of the MS 6 may be notified that the maximum bandwidth of the MS 6 has not been changed.
On the other hand, when the maximum bandwidth currently allocated to the MS 6 is larger than the maximum bandwidth B _rj corresponding to the CQI of the MS 6 obtained in S202 (FIG. 10, S203: Yes route), the MS 6 obtained in S202 is obtained in S204Y. The maximum bandwidth corresponding to the CQI is set as the maximum bandwidth of the MS 6, and the process proceeds to S205. For example, the maximum bandwidth corresponding to the corresponding user identifier in the MS-specific maximum bandwidth table is overwritten with the maximum bandwidth corresponding to the CQI of MS 6 obtained in S202. If the allocated maximum bandwidth is larger than the maximum bandwidth corresponding to the CQI of MS6, the bandwidth of the radio section between MS6 and BS4 may be smaller than the bandwidth between BS4 and BCGW2, and buffer overflow may occur in BS4. . In the present embodiment, the maximum bandwidth allocated to the user in S204 is changed so that a difference between the bandwidth between MS6 and BS4 and the bandwidth between BS4 and BCGW2 is less likely to occur.
In addition, as described above, in the case of MS6 that does not satisfy the condition of MS6 higher than the upper limit threshold or lower than the lower limit threshold (the latter case described above), the relationship between the comparison result and S204Y / S204N is opposite to the above case. Become. For example, when the maximum bandwidth currently allocated to the MS 6 is smaller than the maximum bandwidth B _rj corresponding to the CQI of the MS 6 (S203: N), the processing of the step S204Y is executed, and the maximum bandwidth B _rj corresponding to the CQI of the MS 6 is executed. If the maximum bandwidth currently allocated to the MS 6 is larger (S203: Y), the processing moves to step S205 without changing the maximum bandwidth as in step S204N.

In S205, the BCGW 2 executes S202 to S204 for another MS 6 that has acquired the CQI this time. If S202 has already been executed for all the MSs 6 that have acquired the CQI this time, the process proceeds to S206.
In S206, if there is no MS6 that has changed the maximum bandwidth among the MS6 that has acquired the CQI this time (S206: N), the BCGW 2 proceeds to S207N and ends the maximum bandwidth allocation flow.
In S206, BCGW2 has MS6 which changed the maximum band among MS6 which acquired CQI this time (S206: Y), and BCGW2 is the maximum band of MS6 except MS6 which changed the maximum band in S203Y. Assign. Here, the MS 6 that is the target of the maximum bandwidth allocation is the MS 6 excluding the MS 6 whose maximum bandwidth has been changed in S203Y from the set of MS 6 targeted by the maximum bandwidth allocation by the BCGW 2 before the CQI acquisition. That is, the target set of MSs 6 may be service units, base station units, base stations and service units. The maximum bandwidth allocation method of the target MS 6 can be based on the method exemplified as the maximum bandwidth allocation by the BCGW 2 before the CQI acquisition.
For example, the BCGW 2 includes a maximum bandwidth ratio table for each UP including a service identifier X, a total amount B of maximum bandwidths of all MSs 6 connected to the service X, and a weight (ratio) R _i of maximum bandwidth allocation for UP = i in the service X. Based on the MS maximum bandwidth table including the identifier of each MS 6 connected to the service X and UP = i of each MS 6 connected to the service X, a reference value B of the maximum bandwidth allocated to each MS 6 based on the following formula: Set to ₀ .
[Formula 2]
B ₀ = B ′ / ΣR _i N ′ _i
Here, N ′ _i is obtained by subtracting the number of MSs 6 having UP = i from the number of MSs 6 having UP = i among the MSs 6 connected to the service X from the number of MSs 6 having the maximum bandwidth changed in S203Y. Based on the information of the maximum bandwidth table for each MS, the BCGW 2 counts and determines. B ′ is the total amount B of the maximum bandwidth of all MSs 6 connected to the service X minus the maximum amount of the maximum bandwidth after the change of the MS 6 whose maximum bandwidth has been changed in S203Y. The BCGW 2 obtains the maximum bandwidth assigned to each MS 6 in the B and MS maximum bandwidth table. Also, Σ is an arithmetic symbol representing the sum related to i (sum related to all UPs).

Based on B ₀ obtained in this way, the maximum bandwidth of MS 6 having UP = i is set to R _i B ₀ for MS 6 whose maximum bandwidth has not been changed in S203Y, and is stored in the MS-specific maximum bandwidth table. Stored and used for maximum bandwidth control in the downlink direction in BCGW2. For example, when the user's maximum bandwidth in S204 is changed so as to be reduced, the bandwidth remaining due to this change is allocated to other users in the processing of S207Y, and resources can be used effectively. it can.
Further, the maximum bandwidth in the uplink direction may be obtained in the same manner and used for the maximum bandwidth control in the uplink direction in BCGW2. Further, the maximum bandwidth in the uplink direction, the downlink direction, or the uplink and downlink directions obtained by the same method may be notified to the BS 4 or the MS 6, and the maximum bandwidth control may be performed by the BS 4 or the MS 6 based on the notified value. . Examples of the maximum bandwidth control method include rate shaping by queuing using a shaping queue, and rate policing for discarding packets exceeding the maximum bandwidth.
Note that this step may be omitted in the case where there is another opportunity for allocating the maximum bandwidth of the MS 6 such as periodic maximum bandwidth allocation based on a timer.
As described above, the BCGW 2 may allocate the maximum bandwidth for the MS 6 belonging to a predetermined service for each service. For example, the BCGW 2 provides a plurality of services to the MS 6 that is allowed to provide the services in advance. For the MS 6 belonging to a predetermined service, the BCGW 2 collects the band information of the radio section from the BS 4 to which the MS 6 belongs or from the MS 6, and based on the first band information of the radio section, the BCGW 2 sends the BS 4 to each MS 6 connected to the service. And the maximum bandwidth between BS6 and BCGW2 may be allocated.
The BCGW 2 may allocate a maximum bandwidth for each MS and for each service. For example, the maximum bandwidth between BS4 and MS6 and between BS4 and BCGW2 may be allocated to each MS6 connected to a predetermined service among MS6 belonging to BS4 based on the band information of the wireless section.

2-4. Modification 1 of the first embodiment
The above embodiment is an example in which the maximum bandwidth is assigned based on the reception strength of the terminal, but the maximum bandwidth may be assigned based on the number of downlink bytes per unit time buffered in the base station (BS4). For example, the MS 6 in which the downlink packet buffer amount for each user in the BS 4 reaches or exceeds a predetermined threshold value is subtracted from the current assigned value to obtain a new maximum bandwidth. Further, when the downlink packet buffer amount for each user in BS 4 recovers to a predetermined threshold value or less, the maximum bandwidth is reset.
More specifically, first, the BS 4 or the OAM 7 detects that the amount of downlink packet buffer for each user in the BS 4 exceeds a threshold value. When the threshold excess is detected, the BS 4 or OAM 7 notifies the BCGW 2 of the user identifier and the buffer threshold excess amount. The BS 4 GW calculates the bandwidth b _{c +} corresponding to the number of bytes in the user unit buffered in the BS 4 from the time average of the threshold excess amount of the buffer amount in the user unit in the BS 4, and resets the maximum bandwidth. For example, the band b _{c +} is subtracted from the current maximum band B _i ′, and a new maximum band B _c ′ is set (B _c ′ = B _i ′ −b _{c +} ).
When the buffer amount per user in the BS 4 is less than or equal to the threshold value, the BS 4GW calculates the difference b _c− between the threshold value and the time average of the buffer amount and resets the maximum bandwidth. For example, a new maximum bandwidth is set by adding the bandwidth b _c− to the current maximum bandwidth B _c ′ (B _c ′ + b _c− ). In addition to using the threshold excess amount and the difference from the threshold, an appropriate value corresponding to the packet buffer amount may be used.
After allocating the maximum bandwidth for the corresponding user, the processing of steps S206 and S207Y described above may be executed to recalculate the bandwidth of other users.

2-5. Modification 2 of the first embodiment
Further, the maximum bandwidth may be allocated based on the difference between the number of bytes transmitted by the BCGW 2 and the number of bytes received by the MS 6. For example, a terminal whose difference between the number of bytes transmitted by BCGW 2 and the number of bytes received by MS 6 has reached a threshold value or more allocates a new maximum bandwidth obtained by subtracting the maximum bandwidth corresponding to the amount from the current allocation value. When the difference between the number of bytes transmitted by BCGW2 and the number of bytes received by MS6 recovers below the threshold, the maximum bandwidth is reset.
More specifically, first, the difference between the number of bytes transmitted by BCGW2 and the number of bytes received by MS6 is collected by BS4 or OAM7, for example, and the number of bytes transmitted by BCGW2 and the number of bytes received by MS6. BS4 or OAM7 detects that the threshold value is exceeded. When the threshold excess is detected, the BS4 or OAM 7 notifies the BCGW 2 of the threshold excess amount of the difference between the user identifier, the number of transmitted bytes of BCGW 2 and the number of received bytes of the MS 6. The BS 4 GW calculates the bandwidth bc _{′ +} corresponding to the difference between the number of bytes transmitted by the BCGW 2 and the number of bytes received by the MS 6 from the time average of the above threshold excess amount, and resets the maximum bandwidth. For example, the band b _{c ′ +} is subtracted from the current maximum band B _i ′, and a new maximum band B _c ′ is set (B _c ′ = B _i ′ −b _{c ′ +} ).
When the difference between the number of transmitted bytes of BCGW2 and the number of received bytes of MS6 is equal to or less than the threshold value for a certain period of time, the difference b _c′− between the threshold value and the time average of the above difference is calculated and the maximum bandwidth is re-established. Set. For example, the band b _c′− is added to the current maximum band B _c ′ to set a new maximum band (B _c ′ + b _c− ). In addition to using the threshold excess amount and the difference from the threshold, an appropriate value corresponding to the difference between the transmission byte number of BCGW2 and the reception byte number of MS6 may be used.
After allocating the maximum bandwidth for the corresponding user, the processing of steps S206 and S207Y described above may be executed to recalculate the bandwidth of other users.

3. Second embodiment (based on the transmission waiting packet buffer amount of BS4)
The second embodiment relates to the setting of the maximum bandwidth total amount, and shows an example of the setting of the maximum bandwidth total amount assigned to all the MSs 6 belonging to the BS 4 based on the transmission waiting packet buffer amount of the BS 4.
According to the present embodiment, for example, in a wireless communication system, when allocating a maximum bandwidth to each mobile station in a cell of a base station with a gateway, based on the bandwidth information of the wireless section between the base station and the mobile station, Sets the total amount of the maximum bandwidth allocated to all mobile stations belonging to the service received by the base station or mobile station, assigns the maximum bandwidth to each mobile station belonging to the base station based on the total amount, and sets the maximum of each terminal assigned by the gateway It is possible to avoid the difference between the band and the band of the radio section between the base station and the terminal belonging to the base station.

3-1. System [Example of Architecture of Mobile Radio Communication System of this Embodiment]
FIG. 11 shows an example of the architecture of the mobile radio communication system of the present embodiment.
The BCGW 2 is connected to an IP (IP: Internet Protocol) network 1, a PS 3, a BS 4, and an OAM 7. The BCGW 2 has a function of acquiring the transmission waiting packet buffer amount of each BS 4 from the BS 4 or the OAM 7 and setting the total amount of the maximum bandwidth between the BS 4 and the MS 6 and between the BS 4 and the BCGW 2 allocated to the MS 6 belonging to a certain BS 4. Further, the BCGW 2 transmits / receives control signals and data to / from the IP network 1, PS3, BS4, and OAM7. When the policy information is preset in the BCGW 2, PS3 can be omitted. Further, when the BCGW 2 directly acquires the transmission waiting packet buffer amount of the BS 4 from the BS 4, the OAM 7 can be omitted.
The PS 3 is connected to the BCGW 2 and manages, as policy information, information such as the UP of each MS 6 used for the maximum bandwidth allocation of each MS 6 and the weight of the maximum bandwidth allocation based on the UP. PS3 transmits and receives control signals and data to and from BCGW2. When the policy information is preset in the BCGW 2, PS3 can be omitted.
The BS 4 is connected to the BCGW 2 and the OAM 7 and transmits / receives control signals and data to / from the BCGW 2 and the OAM 7 and the MS 6 within its own wireless communication range 5. As described above, when the BCGW 2 directly acquires the transmission waiting packet buffer amount of the BS 4 from the BS 4, the OAM 7 can be omitted.
The MS 6 transmits / receives control signals and data to / from the BS 4 capable of wireless communication.
The OAM 7 is an external device that is connected to the BCGW 2 and the BS 4 and acquires the statistical items of the BS 4. The OAM 7 transmits / receives control signals and data to / from the BCGW 2 and the BS 4. The statistical items to be acquired can be determined in advance. As described above, when the BCGW 2 directly acquires the transmission waiting packet buffer amount of the BS 4 from the BS 4, the OAM 7 can be omitted.

3-2. Device configuration 3-2-1. BCGW2
[An example of BCGW2 of the present embodiment]
As an example of a functional block diagram of BCGW 2 used in the present embodiment, a case of an apparatus configuration similar to that of FIG. 3 described in the first embodiment is shown. However, the function of each block is as follows.
The network interface unit 21 is the same as that in the first embodiment.
The BS interface unit 22 is an interface with the BS 4. With the BS interface unit 22, the BCGW 2 transmits and receives IP packets to and from the BS 4. In the present embodiment, the BCGW 2 receives the BS4 transmission waiting packet buffer amount from the BS4 by the BS interface unit 22, or receives the transmission waiting packet buffer amount of the BS4 from the OAM7 by the OAM interface unit 24.
The PS interface unit 23 is an interface with PS3. With the PS interface unit 23, the BCGW 2 transmits and receives IP packets with the PS3. In the present embodiment, the BCGW 2 uses the PS interface unit 23 from the PS 3 to the user identifier of each MS 6, the UP of each MS 6, the initial value of the total maximum bandwidth in each service, the maximum bandwidth allocation ratio corresponding to each UP in each service It is possible to receive information relating to a policy such as an increase / decrease amount of the maximum total bandwidth corresponding to the transmission waiting packet buffer amount of each BS 4. In the case of an architecture in which PS3 is omitted by setting information related to the policy in BCGW2 or being notified to BCGW2 from another node, PS interface unit 23 can be omitted.

The OAM interface unit 24 is an interface with the OAM 7. With the OAM interface unit 24, the BCGW 2 transmits and receives IP packets to and from the OAM 7. In the present embodiment, the BCGW 2 receives the BS4 transmission waiting packet buffer amount from the BS4 by the BS interface unit 22, or receives the transmission waiting packet buffer amount of the BS4 from the OAM7 by the OAM interface unit 24. When the BS4 transmission waiting packet buffer amount is notified directly from the BS4 to the BCGW2, the OAM interface unit 24 can be omitted.
The memory unit 25 stores and manages information such as IP packets to be transmitted / received, the address of the PS 3 to be connected, the address of the BS 4 to be connected, the address of the OAM 7 to be connected, the user identifier of each MS 6 as necessary. In the present embodiment, the memory unit 25 has a UP-specific maximum bandwidth ratio table, a MS-specific maximum bandwidth table, and a maximum bandwidth total amount increase / decrease amount table, and the UP of each MS 6 and the total maximum bandwidth in each service. Initial bandwidth value, maximum bandwidth allocation ratio corresponding to each UP in each service, increase / decrease amount of maximum bandwidth corresponding to the amount of packet buffer waiting for transmission of each BS4, maximum bandwidth currently allocated to each MS6 in each service, etc. Information can be managed.
The processing unit 26 performs management of information held in the memory unit 25, IP packet transmission / reception processing such as construction and analysis of IP packets, and the like. In the present embodiment, the processing unit 26 performs setting of the total amount of the maximum bandwidth allocated to each MS 6, calculation of the maximum bandwidth value of each MS 6 based on the UP and BS 4 transmission waiting packet buffer amounts in each service, and the like.

[An example of information held in the memory unit of the BCGW 2 of the present embodiment]
FIG. 12 shows a maximum bandwidth ratio table for each UP as an example of information held in the memory unit of the BCGW 2 according to the present embodiment.
The service identifier is an identifier of a service provided by the IP network 1 to which the BCGW 2 is connected. The total maximum bandwidth B _c is the total maximum bandwidth allocated to each MS 6 set in service units. In the present embodiment, this value is changed according to the amount of the packet waiting to be transmitted by BS4. The maximum bandwidth ratio R _i is a value representing the maximum bandwidth allocated to the MS 6 with UP = i as a ratio for each UP.
FIG. 13 shows an MS-specific maximum bandwidth table for a certain service as an example of information held in the memory unit of the BCGW 2 according to the present embodiment. The MS-specific maximum bandwidth table can be provided for each service.
The user identifier is an identifier of MS6. It may be an identifier of a user who uses MS6. UP is a value indicating the level of priority assigned to each user. For example, the smaller the value, the higher the priority. The maximum bandwidth indicates the maximum bandwidth allowed when the MS 6 corresponding to each user identifier connects to a desired service. The maximum bandwidth value obtained by the calculation of the processing unit 26 of the BCGW 2 is stored, and the value is subsequently updated when the maximum bandwidth is recalculated.
FIG. 14 shows an increase / decrease amount table of the maximum total bandwidth of each BS4 transmission waiting packet buffer for a certain service as an example of information held in the memory unit of the BCGW 2 according to the present embodiment.
The maximum bandwidth total increase / decrease amount table stores, for example, the maximum bandwidth increase / decrease amount according to the buffer amount.
The buffer amount is an index indicating the transmission waiting packet buffer amount for all the MSs 6 in the downlink direction or the uplink direction of the BS 4, and the smaller the value, the smaller the transmission waiting packet buffer amount. The maximum bandwidth increase / decrease amount indicates an amount by which the total amount of the maximum bandwidth allocated to all the MSs 6 connected to the BS 4 is increased or decreased with respect to the transmission waiting packet buffer amount of each BS 4.

3-2-2. BS4
[An example of BS4 of this embodiment]
As an example of a functional block diagram of BCGW 2 used in the present embodiment, a case of an apparatus configuration similar to that of FIG. 4 shown in the first embodiment is shown. The function of each block is as follows.
The wireless interface unit 41 is a wireless interface. The wireless interface unit 41 allows the BS 4 to transmit and receive IP packets with the MS 6. Further, when the transmission waiting packet buffer amount of the BS 4 in the downlink direction is used for setting the maximum amount of the maximum bandwidth, the data packet is buffered separately for each service from information such as the destination IP address.
The BCGW interface unit 42 is an interface with the BCGW 2. With the BCGW interface unit 42, the BS 4 transmits and receives IP packets to and from the BCGW 2. In the present embodiment, the BS 4 transmits the transmission waiting packet buffer amount of the BS 4 to the BCGW 2 by the BCGW interface unit 42 or transmits the transmission waiting packet buffer amount of the BS 4 to the OAM 7 by the OAM interface unit 43. In addition, when the transmission waiting packet buffer amount of the BS 4 in the downlink direction is used for setting the maximum amount of the maximum bandwidth, the data packet is buffered separately for each service from information such as the source IP address.
The OAM interface unit 43 is an interface with the OAM 7. The OAM interface unit 43 causes the BS 4 to transmit and receive IP packets with the OAM 7. In the present embodiment, the BS 4 transmits the transmission waiting packet buffer amount of the BS 4 to the BCGW 2 by the BCGW interface unit 42 or transmits the transmission waiting packet buffer amount of the BS 4 to the OAM 7 by the OAM interface unit 43. When the BS4 transmission waiting packet buffer amount is notified directly from the BS4 to the BCGW2, the OAM interface unit 43 can be omitted.
The memory unit 44 stores and manages information such as IP packets to be transmitted / received, the address of the BCGW 2 to be connected, and the address of the MS 6 to be connected. A buffer for storing packets to the MS 6 may be configured on the memory unit 44. In the present embodiment, the memory unit 44 has, for example, a transmission waiting packet buffer amount table, and manages information such as the transmission waiting packet buffer amount of the BS 4 regarding data packets of each service.
The processing unit 45 performs management of information held in the memory unit 44, IP packet transmission / reception processing such as construction and analysis of IP packets, and the like.
The battery unit 46 is the same as that in the first embodiment.

[An example of information held in the memory unit of the BS 4 of this embodiment]
FIG. 15 shows a BS4 transmission waiting packet buffer amount table for each service as an example of information held in the memory unit of BS4 of the present embodiment.
The transmission waiting packet buffer amount table stores, for example, the accumulated buffer amount corresponding to the service identifier.
The service identifier is an identifier of a service provided by the IP network 1 to which the BCGW 2 is connected. The buffer amount is an index indicating the transmission waiting packet buffer amount for all the MSs 6 in the downlink direction or the uplink direction of the BS 4, and the smaller the value, the smaller the transmission waiting packet buffer amount. For example, the buffer amount of the buffer of the BCGW interface unit 42 or the buffer of the wireless interface unit 41 is shown. The transmission waiting packet buffer amount may be updated at a predetermined cycle, or may be sequentially updated in response to packet input and output.

3-2. Setting of the maximum amount of maximum bandwidth [an example of setting of the total amount of maximum bandwidth of MS6 and allocation of the maximum bandwidth of MS6 by BCGW2 before acquisition of the transmission-waiting packet buffer amount of BS4 of this embodiment]
The BCGW 2 can assign an initial value of the total amount of the maximum bandwidth of the MS 6 based on the service policy before acquiring the transmission waiting packet buffer amount of the BS 4. The total amount of the maximum bandwidth of the MS 6 may be set in service units, base station units, or base stations and service units. Further, BCGW2 assigns the initial value of the maximum bandwidth of each MS6 based on the service policy in the same manner as in the first embodiment described above before acquiring the transmission waiting packet buffer amount of BS4. The sum of the maximum bands of the MS 6 may be set as a new initial value of the total amount of the maximum bands. As for the assignment of the initial value of the maximum bandwidth of each MS 6, there are the following examples as in the first embodiment.
When the initial value of the maximum bandwidth of each MS 6 allowed to provide a service is preset in the BCGW 2 or notified from the PS 3, the BCGW 2 sets the value of each MS 6 allowed to provide the service. It may be used as an initial value of the maximum bandwidth.
In addition, when the information on the total amount of the maximum bandwidth of all the MSs 6 connected to a certain service is preset in BCGW2 or notified from PS3, BS4, and OAM7, BCGW2 is connected to the maximum amount of bandwidth and the service. The initial value of the maximum bandwidth of each MS 6 may be set based on the number of MS 6 to perform.
In addition, when the information on the total amount of the maximum bandwidth of all the MSs 6 connected to a certain base station is preset in BCGW2 or notified from PS3, BS4, OAM7, BCGW2 The initial value of the maximum bandwidth of each MS 6 may be set based on the number of MSs 6 connected to.
In addition, when the initial value of the maximum bandwidth for each UP is preset in the BCGW 2 or notified from the PS 3 together with the UP of each MS 6, the BCGW 2 is allowed to provide services based on the UP. The initial value of the maximum bandwidth of the MS 6 may be set to a larger value, for example, for the MS 6 having a high UP.

In addition, the BCGW 2 is preconfigured in the BCGW 2 with the weight of the maximum bandwidth allocation for each UP together with the UP of each MS 6 and the total amount of the maximum bandwidth of all the MSs 6 connected to the service, or from the PS 3, BS 4, OAM 7 When notified, the initial value of the maximum bandwidth of each MS 6 may be set based on the total amount of the maximum bandwidth and the number of MSs 6 having each UP among the MSs 6 connected to the service.
In addition, the BCGW 2 has the information of the maximum bandwidth allocation weight R _i for each UP together with the UP of each MS 6 and the total amount B of the maximum bandwidth of all the MSs 6 connected to the base station in the BCGW 2 or PS3, When notified from BS4 and OAM7, the initial value of the maximum bandwidth of each MS6 may be set based on the total amount of the maximum bandwidth and the number of MS6 having each UP among the MS6 connected to the base station. .
Also, the BCGW 2 is preconfigured in the BCGW 2 with the weight of the maximum bandwidth allocation for each UP along with the UP of each MS 6 and the total amount of the maximum bandwidth of all the MSs 6 connected to the base station, or PS3, BS4, OAM7 , Based on the total amount of the maximum bandwidth and the number of MSs 6 having each UP among the MSs 6 connected to the service among the MSs 6 connected to the base station, An initial value for the maximum bandwidth may be set.
For example, for each BS 4, the BCGW 2 assigns the service identifier X, the total bandwidth B _c of all the MSs 6 belonging to the BS 4 and connected to the service X, and the maximum bandwidth allocation weight (ratio) for UP = i in the service X. ) and uP-specific maximum bandwidth ratio table containing _{R i,} each MS6 identifier (user identifier to connect to and and service X belongs to the BS4), each connected to a service X belongs to the BS4 MS6 of uP = Based on the MS-specific maximum bandwidth table including i, the maximum bandwidth reference value B _c0 assigned to each MS 6 is set based on the following equation.
[Formula 3]
B _c0 = B _c / ΣR _i N _i
Here, N _i is the number of MSs 6 having UP = i among the MSs 6 connected to the service X, and the BCGW 2 counts and obtains it based on the information in the MS-specific maximum bandwidth table. Also, Σ is an arithmetic symbol representing the sum related to i (sum related to all UPs).
The UP-specific maximum bandwidth ratio table may be common between the BSs 4 or may be set differently for each BS 4. Further, the BCGW 2 knows to which BS 4 each MS 6 belongs from the BS 4 identifier BS 4 ID obtained from the BS 4 or the OAM 7 and can create a maximum bandwidth table for each BS 4 for each MS.
Based on B _c0 obtained in this way, the maximum bandwidth of MS 6 having UP = i is set to R _i B _c0 and stored in the MS-specific maximum bandwidth table. The stored maximum bandwidth is used for maximum bandwidth control in the downlink direction in BCGW2. Further, the maximum bandwidth in the uplink direction may be obtained in the same manner and used for the maximum bandwidth control in the uplink direction in BCGW2. Further, the maximum bandwidth in the uplink direction, the downlink direction, or the uplink and downlink directions obtained by the same method may be notified to the BS 4 or the MS 6, and the maximum bandwidth control may be performed by the BS 4 or the MS 6 based on the notified value. . As the maximum bandwidth control method, there are rate shaping by queuing using a shaping queue, rate policing for discarding packets exceeding the maximum bandwidth, etc., but other methods may be used.
The maximum bandwidth R _i B _c0 set by this method satisfies the total amount of the maximum bandwidth of all the MSs 6 belonging to the BS 4 and connected to the service X = B _c , and the service X for the MS 6 having each UP maximum bandwidth allocation weighting (ratio) satisfies the condition of _{R i} for uP = i in.

[One Example of BCGW2 Processing in Maximum Bandwidth Setting and Maximum Bandwidth Allocation Based on BS4 Transmission Waiting Packet Buffer Size of the Present Embodiment]
FIG. 16 shows an example of BCGW2 processing in setting the maximum amount of the maximum bandwidth.
In S211, the BCGW 2 receives the transmission buffer packet amount of the BS 4 from the BS 4 or the OAM 7. The transmission waiting packet buffer amount of BS4 may be defined by any of MS6 unit, service unit, MS6 and service unit, or the total transmission waiting packet buffer amount of all MS6 belonging to BS4. The OAM 7 may acquire the transmission waiting packet buffer amount of each BS 4 from the BS 4 as a statistical item. Thereby, BCGW2 can acquire the transmission buffer packet amount of each BS4 directly from BS4 or via OAM7. The BCGW 2 may acquire the transmission waiting packet buffer amount of all the BSs 4, may acquire only the transmission waiting packet buffer amount of the BS 4 in which the transmission waiting packet buffer amount of the BS 4 is larger than the threshold, or may wait for the transmission of the BS 4 Only the transmission waiting packet buffer amount of the BS 4 having a packet buffer amount larger than the upper limit threshold and the BS 4 having a packet buffer amount smaller than the lower limit threshold may be acquired. When the threshold is used, all BSs 4 that have reached the threshold condition may be targeted for acquisition of the packet waiting for transmission of BS4, or BS4 that satisfies the threshold condition for a certain period of time or more may be targeted for acquisition of the waiting for packet buffer of BS4. Also good. In addition, the transmission waiting packet buffer amount of BS4 that satisfies the threshold condition is notified, but the transmission waiting packet buffer amount of all BS4 that does not satisfy the threshold condition or the transmission waiting packet buffer amount of BS4 that satisfies the threshold condition is notified. However, BS4 in which the state that does not satisfy the threshold condition continues for a certain period of time may be set as a transmission waiting packet buffer amount acquisition target of BS4. Further, when only the transmission waiting packet buffer amount of a specific BS4 is acquired according to a certain threshold, the threshold may be set to BS4, and when BCGW2 acquires the transmission waiting packet buffer amount of BS4 from OAM7, it is set to OAM7. Alternatively, it may be determined according to a threshold value from among the transmission waiting packet buffer amounts of BS4 set and notified in BCGW2. Further, as an example of the opportunity for the BCGW 2 to acquire the transmission waiting packet buffer amount of the BS 4, the BS 4 transmission waiting packet buffer exemplified in the case of using the location registration / area change / handover of the MS 6, periodic notification by a timer, and the above threshold value is used. For example, the transmission waiting packet buffer amount of the BS 4 which is the amount acquisition target is acquired. In addition, the threshold value may be notified to the BS 4 or the OAM 7 by the BCGW 2 that is preset in the BCGW 2 or acquired from the PS 3, or may be preset in the BS 4 or the OAM 7. In addition, the transmission waiting packet buffer amount of BS4 of BCGW2 may be acquired independently for each BS4 unit, or for each BS4 and service unit. However, the a maximum bandwidth allocation by transmitting packets waiting buffer amount before obtaining BCGW2 of BS4, if you are independently set the amount _{B c} of the maximum bandwidth allocated to MS6 to BS4 and service units, transmission waiting BS4 of BCGW2 The packet buffer amount is also acquired independently for each BS4 and service unit.

In S212, the BCGW 2 increases / decreases an amount of increase / decrease in the total amount of maximum bandwidth for each BS4 transmission waiting packet buffer indicating the correspondence between the amount of packet waiting for transmission of the BS4 and the amount (increase / decrease) of the maximum amount of bandwidth allocated to the MS6. Based on the above, the amount by which the total amount of the maximum bandwidth corresponding to the acquired transmission buffer packet amount of the BS 4 is increased or decreased is obtained. The amount of increase / decrease in the total amount of the maximum bandwidth allocated to the MS 6 in the increase / decrease amount table of the maximum bandwidth total for each transmission waiting packet buffer of the BS 4 is allocated to the MS 6 by the maximum bandwidth allocation by the BCGW 2 before obtaining the transmission waiting packet buffer amount of the BS 4. in accordance with the set unit of the total amount B _c of the maximum bandwidth may be independently set to BS4 units or BS4 and service units. The correspondence relationship between the amount of increase / decrease in the total amount of packet waiting for BS4 and the amount of packet waiting for transmission in BS4 in the table for the amount of maximum bandwidth for transmission packet buffer may be preset in BCGW2 However, it may be acquired from PS3.
In S213, the BCGW 2 determines the total maximum bandwidth allocated to the MS 6 in the maximum bandwidth ratio table for each UP based on the amount by which the total maximum bandwidth allocated to the MS 6 corresponding to the transmission waiting packet buffer amount of the BS 4 obtained in S212 is increased or decreased. _Increase or decrease Bc.
In S214, the BCGW 2 allocates the maximum band of the MS 6 that is the target of the maximum band allocation change. For example, according to the above (Equation 3), the maximum bandwidth of each MS 6 is recalculated and stored in the MS-specific maximum bandwidth table. Here, the MS 6 subject to the change of the maximum bandwidth allocation is the MS 6 targeted for the maximum bandwidth allocation by the BCGW 2 before the transmission waiting packet buffer amount of the BS 4 is acquired. That is, the set of target MSs 6 may be BS4 units or BS4 and service units. For example, when the total amount of the changed maximum bandwidth is for a certain BS, each MS 6 belonging to that BS is targeted. The maximum bandwidth allocation method of the target MS 6 is based on the method exemplified as the maximum bandwidth allocation by the BCGW 2 before acquiring the transmission waiting packet buffer amount of the BS 4.
Note that this step may be omitted in the case where there is another opportunity for allocating the maximum bandwidth of the MS 6 such as periodic maximum bandwidth allocation based on a timer.

3-3. Modification 1 of the second embodiment
The second embodiment described above is an example in which the entire band is set based on the number of downlink bytes buffered in the BS 4, but based on the difference between the number of bytes transmitted by the BCGW 2 and the number of bytes received by the MS 6. Bands may be allocated. For example, a terminal whose total amount in a cell of the difference between the number of bytes transmitted by BCGW2 and the number of bytes received by the terminal has reached a threshold or more is subtracted from the current total band value to obtain a new total band. Reallocate the maximum bandwidth of each terminal. When the total amount in the cell of the difference between the number of bytes transmitted by the BCGW 2 and the number of bytes received by the terminal is equal to or less than the threshold value, the total bandwidth is increased and the maximum bandwidth of each terminal is reassigned.
More specifically, first, the BS 4 or the OAM 7 detects the above threshold excess. When an excess of the threshold is detected, B _{c ′ +} is calculated from the time average of the excess of the threshold for the total difference between the number of bytes transmitted by BCGW2 and the number of received bytes by MS6, and the entire band is reset (B _New = _{BBc '+} ). In addition, regarding the total amount of differences between the number of transmitted bytes of BCGW2 and the number of received bytes of MS6, when the state below the threshold continues for a certain period of time, the difference B _c′− between the threshold and the time average of the total amount of differences is calculated The bandwidth is reset (B _New = B + B _c′− ).
B _{c ′ ±} is a band corresponding to the difference between the number of bytes transmitted by the BCGW 2 and the number of bytes received by the terminal, and sets the entire band according to the congestion in the radio section.
After setting all the bands, the process of step 214 described above is executed to determine the maximum band for each user.

3-4. Modification 2 of the second embodiment
Further, the entire band may be allocated based on the cell throughput (the number of base station downlink transmission bytes). For example, a terminal in which the difference between the number of bytes per unit time transmitted by BCGW2 and the cell throughput has reached a threshold value or more is subtracted from the current total bandwidth value to obtain a new total bandwidth. Reallocate maximum bandwidth. Further, if the state where the difference between the number of bytes per unit time transmitted by BCGW2 and the cell throughput is equal to or less than the threshold value continues for a certain period of time, the total bandwidth is increased and the maximum bandwidth of each terminal is reassigned.
More specifically, first, the BS 4 or the OAM 7 detects the above threshold excess. When the threshold excess is detected, B _{c ″ +} is calculated from the time average of the threshold excess amount for the difference between the number of transmitted bytes per unit time of BCGW2 and the cell throughput, and the entire bandwidth is reset (B _New = B −B _{c ″ +} ). In addition, regarding the total amount of differences between the number of transmitted bytes of BCGW2 and the number of received bytes of MS6, when a state equal to or lower than the threshold value continues for a certain period of time, a difference B _{c ″ −} between the threshold value and the time average of the total amount of differences is calculated. Reset all bands (B _New = B + B _{c ″ −} ).
Note that B _{c ″ ±} is a band corresponding to the difference between the number of bytes per unit time transmitted by the BCGW 2 and the cell throughput, and sets the entire band according to the congestion in the radio section.
After setting all the bands, the process of step 214 described above is executed to determine the maximum band for each user.

4). Third Embodiment In the third embodiment, the maximum bandwidth of each MS 6 is allocated in the BCGW 2 based on the first embodiment using the maximum total bandwidth set based on the second embodiment. As an example, the maximum total bandwidth allocated to all the MSs 6 belonging to the BS 4 set based on the transmission buffer packet amount of the BS 4 is used. An example of allocating the maximum bandwidth will be described. The first embodiment and its modifications may be combined with the second embodiment and its modifications as appropriate.

4-1. System [Example of Architecture of Mobile Radio Communication System of this Embodiment]
FIG. 1 shows an example of the architecture of a mobile radio communication system assumed in the present embodiment. Each device has both the functions of the first embodiment and the functions of the second embodiment, and the details are as described above. The outline of each device is as follows.
The BCGW 2 is connected to an IP (IP: Internet Protocol) network 1, PS 3, BS 4, and OAM 7, obtains the transmission waiting packet buffer amount and CQI of each BS 4 from the BS 4 or OAM 7, and is assigned to the MS 6 belonging to a certain BS 4. And the function of setting the total amount of the maximum bandwidth between BS4 and BCGW2. BCGW2 further has a function of setting a maximum band between BS4 and MS6 and between BS4 and BCGW2 assigned to MS6 belonging to a certain BS4. Further, the BCGW 2 transmits / receives control signals and data to / from the IP network 1, PS3, BS4, and OAM7. When the policy information is preset in the BCGW 2, PS3 can be omitted. Further, when the BCGW 2 directly obtains the transmission waiting packet buffer amount of the BS 4 and the CQI of the MS 6 from the BS 4, the OAM 7 can be omitted.
The PS 3 is connected to the BCGW 2, manages information such as the UP of each MS 6 used for the maximum bandwidth allocation of each MS 6 and the weight of the maximum bandwidth allocation based on the UP as policy information, and transmits / receives control signals and data to / from the BCGW 2. . When the policy information is preset in the BCGW 2, PS3 can be omitted.
The BS 4 is connected to the BCGW 2 and the OAM 7 and transmits / receives control signals and data to / from the BCGW 2 and the OAM 7 and the MS 6 within its own wireless communication range 5. When the BCGW 2 obtains the transmission buffer packet size of the BS 4 and the CQI of the MS 6 directly from the BS 4, the OAM 7 can be omitted.
The MS 6 transmits / receives control signals and data to / from the BS 4 capable of wireless communication.
The OAM 7 is an external device that is connected to the BCGW 2 and the BS 4 and acquires the statistical items of the BS 4, and transmits and receives control signals and data to and from the BCGW 2 and the BS 4. When the BCGW 2 obtains the transmission buffer packet size of the BS 4 and the CQI of the MS 6 directly from the BS 4, the OAM 7 can be omitted.

4-2. Device configuration 4-2-1. BCGW2
[An example of BCGW2 of the present embodiment]
As an example of a functional block diagram of BCGW 2 used in the present embodiment, a case of an apparatus configuration similar to that of FIG. 3 described in the first embodiment is shown. The function of each block is as follows.
The network interface unit 21 is the same as that in the first embodiment.
The BS interface unit 22 is an interface with the BS 4. With the BS interface unit 22, the BCGW 2 transmits and receives IP packets to and from the BS 4. In the present embodiment, the BCGW 2 receives the CQI and BS4 transmission waiting packet buffer amounts from the BS 4 by the BS interface unit 22 or receives the CQI and BS 4 transmission waiting packet buffer amounts from the OAM 7 by the OAM interface unit 24. One of the CQI and BS4 transmission waiting packet buffer amounts may be acquired from BS4 and the other from OAM7.
The PS interface unit 23 is an interface with PS3. With the PS interface unit 23, the BCGW 2 transmits and receives IP packets with the PS3. In the present embodiment, it is possible to receive information related to the policies shown in the first embodiment and the second embodiment. In the case of an architecture in which PS3 is omitted by setting policy-related information in BCGW2 or being notified to BCGW2 from another appropriate node, PS interface unit 23 can be omitted.
The OAM interface unit 24 is an interface with the OAM 7. With the OAM interface unit 24, the BCGW 2 transmits and receives IP packets to and from the OAM 7. In the present embodiment, the BCGW 2 receives the CQI and BS4 transmission waiting packet buffer amounts from the BS 4 by the BS interface unit 22 or receives the CQI and BS 4 transmission waiting packet buffer amounts from the OAM 7 by the OAM interface unit 24. One of the CQI and BS4 transmission waiting packet buffer amounts may be acquired from BS4 and the other from OAM7. When the CQI and the amount of packet buffer waiting for transmission of BS4 are notified directly from BS4 to BCGW2, OAM interface unit 24 can be omitted.
The memory unit 25 can store and manage the information shown in the first embodiment and the second embodiment. The processing unit 26 performs the processes shown in the first embodiment and the second embodiment.

4-2-2. BS4
[An example of BS4 of this embodiment]
As an example of a functional block diagram of the BS 4 used in the present embodiment, a case of an apparatus configuration similar to that of FIG. 4 shown in the first embodiment is shown. However, the function of each block is as follows.
The wireless interface unit 41 is a wireless interface. The wireless interface unit 41 allows the BS 4 to transmit and receive IP packets with the MS 6. In the present embodiment, the BCGW 2 transmits a pilot signal from the BS 4 to the MS 6 by the wireless interface unit 41 and measures the CQI of the MS 6 from the response of the MS 6. The BCGW interface unit 42 is an interface with the BCGW 2. With the BCGW interface unit 42, the BS 4 transmits and receives IP packets to and from the BCGW 2. The OAM interface unit 43 is an interface with the OAM 7. The OAM interface unit 43 causes the BS 4 to transmit and receive IP packets with the OAM 7. In this embodiment, the BS 4 transmits the CQI and BS4 transmission waiting packet buffer amount to the BCGW 2 by the BCGW interface unit 42, or transmits the CQI and BS4 transmission waiting packet buffer amount to the OAM 7 by the OAM interface unit 43. One of the CQI and BS4 transmission waiting packet buffer amounts may be transmitted to BCGW2 and the other to OAM7. When the CQI and the amount of packet buffer waiting for transmission of BS4 are notified directly from BS4 to BCGW2, OAM interface unit 43 can be omitted.
The memory unit 44 stores and manages the information shown in the first embodiment and the second embodiment. The processing unit 45 performs the processing shown in the first embodiment and the second embodiment. The battery unit 46 is the same as that in the first embodiment.

4-2. Setting of the maximum amount of maximum bandwidth and allocation of maximum bandwidth [an example of setting of the total amount of maximum bandwidth of MS6 by BCGW2 before acquisition of the packet buffer amount for transmission waiting of BS4 of this embodiment and allocation of maximum bandwidth of MS6 before acquisition of CQI]
The maximum bandwidth can be allocated in the same manner as the setting of the maximum bandwidth of the MS 6 by the BCGW 2 and the allocation of the maximum bandwidth of the MS 6 before acquiring the transmission waiting packet buffer amount of the BS 4 shown in the second embodiment.

[One Example of BCGW2 Processing in Maximum Bandwidth Setting and Maximum Bandwidth Allocation Based on BS4 Transmission Waiting Packet Buffer Size of the Present Embodiment]
The first embodiment is used for the processing in step S214 in the second embodiment. For example, in the processing of BCGW2 in the maximum bandwidth total amount setting and the maximum bandwidth allocation based on the transmission waiting packet buffer amount of BS4 shown in FIG. 16 of the second embodiment, the allocation of the maximum bandwidth of MS6 in S214 is This can be executed in the same manner as the allocation of the maximum bandwidth based on the CQI shown in the first embodiment.
The BCGW 2 calculates the total amount of the maximum bandwidth allocated to the MS 6 belonging to a certain BS 4, and allocates the maximum bandwidth between the BS 4 and the MS 6 and between the BS 4 and the MS 6 to each MS 6 belonging to the BS 4 based on the determined total amount of the maximum bandwidth. May be. Also, the BCGW 2 obtains the total amount of the maximum bandwidth allocated to the MS 6 connected to a certain service among the MSs 6 belonging to a certain BS 4, and based on the obtained total amount of the maximum bandwidth, the BCGW 2 The maximum bandwidth between BS4 and MS6 and between BS4 and BCGW2 may be assigned to each MS6 to be connected.

5. Advantages of each embodiment According to the first and third embodiments described above, in the maximum bandwidth allocation of each mobile station in the gateway in consideration of the bandwidth information of the wireless section, for example, the maximum bandwidth of the mobile station with low reception strength is set. By setting it to a small value, downlink packets are notified from the gateway to the base station, but not all of them can be notified from the base station to the mobile station within a predetermined time. The risk of destruction is reduced. As a result, the difference between the number of transmitted bytes charged by the gateway and the number of bytes actually received by the mobile station is reduced, and the possibility of erroneous charges occurring can be reduced.
In addition, according to each of the above-described embodiments, packets in the gateway to the base station section can be saved by controlling in advance the packets that can be transmitted from the gateway to the base station but cannot be transmitted from the base station to the mobile station. Thus, congestion can be prevented, and the saved bandwidth can be allocated to other users so that resources can be used with higher efficiency.
In addition, according to each of the above-described embodiments, the mobile station notifies the mobile station of the maximum bandwidth in the uplink direction of each mobile station allocated based on the bandwidth information of the wireless section, so that an excessive bandwidth request of the mobile station can be obtained. It is possible to suppress and use resources in the wireless section more efficiently according to the policy of the service or system operator.
In the conventional technology, radio section resource allocation has been performed by scheduling based on the policy of the base station. According to each of the above-described embodiments, the bandwidth is controlled by the gateway based on the service policy. Thus, the schedule allocation policy of the base station can be brought closer to a service policy. For example, in the conventional technology, a gateway wants to allocate more bandwidth to a high priority terminal based on a service policy, but if the reception strength of a high priority terminal is low, the base station scheduler It may occur that a packet of a terminal with high priority is sacrificed to increase the cell throughput based on the policy. In such a case, for example, in the above-described second embodiment, the gateway performs control so that more resources are allocated to the higher priority terminals by allocating a smaller maximum bandwidth to the lower priority terminals. Operation becomes possible. Conversely, the gateway wants to prioritize the cell throughput rather than allocating more bandwidth to the high priority terminal based on the service policy, but if the reception strength of the high priority terminal is low, the base station scheduler Even if the throughput of the cell is sacrificed, it may occur that many resources are allocated to the packet of the terminal with high priority. In such a case, for example, in the first embodiment described above, the gateway assigns a small maximum bandwidth to a terminal with high priority but low reception strength, so that more terminals with low priority but high reception strength are allocated. It is possible to perform operations such as allocating resources and increasing cell throughput. In particular, in the case of a gateway connected to a base station of multiple vendors, there is a possibility that the resource allocation policy of each base station may be different. Necessary.

  The present invention can be used, for example, in a radio communication system and a gateway apparatus that allocate a maximum bandwidth for each radio terminal, and in particular, a user unit or a user for each mobile station between a base station and a mobile station and between a base station and a gateway. The maximum bandwidth of a service unit can be used for a wireless communication system and a gateway device that a gateway sets based on bandwidth information of a wireless section between a base station and a mobile station.

DESCRIPTION OF SYMBOLS 1 IP network 2 Bandwidth control gateway 21 Network interface part 22 BS interface part 23 PS interface part 24 OAM interface part 25 Memory part 26 Processing part S201-S207 Step S211-S214 of the processing flow by the gateway in the maximum bandwidth setting based on CQI Base station Steps S221 to S223 of the processing flow by the gateway in setting the maximum total bandwidth based on the buffer amount of the server Step 3 of the processing flow by the gateway in the maximum bandwidth setting based on the user priority Policy management server 4 Base station 41 Wireless interface unit 42 BCGW interface unit 43 OAM interface unit 44 Memory unit 45 Processing unit 46 Battery unit 5 Wireless communication range of base station 6 Mobile station 7 Relay station

Claims (11)

In a wireless communication system comprising one or more base stations that communicate wirelessly with a wireless terminal, and a gateway device that transmits packets to the wireless terminal via the base station according to a maximum bandwidth allocated to the wireless terminal,
The gateway device,
Based on the bandwidth information before Symbol base station or the radio section between the radio base station that is collected from the terminal and the wireless terminal, the base station each time the total amount of the maximum bandwidth allocated to the radio terminals belonging to a given base station or service Alternatively, the wireless communication system, which is set for each service and assigns the maximum bandwidth between the base station and the wireless terminal and between the base station and the gateway device to each wireless terminal belonging to the base station based on the set total amount of the maximum bandwidth. The gateway device sets each wireless terminal based on a total amount of the set maximum bandwidth and second band information of a wireless section between the base station and the wireless terminal collected from the base station or the wireless terminal. The wireless communication system according to claim 1 , wherein a maximum bandwidth is allocated between the base station and the wireless terminal and between the base station and the gateway device. The gateway device sets a total amount of maximum bandwidth allocated to a wireless terminal connected to a predetermined service among wireless terminals belonging to one of the base stations based on the bandwidth information of the wireless section. the wireless communication system according to 1. The gateway apparatus, described as bandwidth information of the wireless section, in claim 1 which comprises using a transmission waiting packet buffer amount of the buffer of the base station for storing the packets to be transmitted from said base station to said wireless terminal Wireless communication system. The gateway device uses the difference between the amount of data transmitted from the gateway device to a base station to a predetermined wireless terminal and the amount of data received by the wireless terminal as bandwidth information of the wireless section when allocating the maximum bandwidth. The wireless communication system according to claim 1 , wherein the wireless communication system is used. The gateway device uses the difference between the amount of data per unit time transmitted by the gateway device to a predetermined base station and the cell throughput at the base station as the bandwidth information of the wireless section when allocating the maximum bandwidth. The wireless communication system according to claim 1 . The gateway device obtains a total amount of maximum bandwidth to be allocated to a wireless terminal belonging to a certain base station, and determines, based on the obtained total amount of maximum bandwidth, to each wireless terminal belonging to the base station between the base station and the wireless terminal, The wireless communication system according to claim 2 , wherein a maximum bandwidth between gateway devices is allocated. The gateway device obtains a total amount of maximum bandwidth allocated to a wireless terminal connected to a service among wireless terminals belonging to a certain base station, and based on the obtained total amount of maximum bandwidth, the gateway device of the wireless terminal belonging to the base station The wireless communication system according to claim 2 , wherein a maximum bandwidth between the base station and the wireless terminal and between the base station and the gateway device is allocated to each wireless terminal connected to the service. The base station, the bandwidth information of the wireless section between the wireless terminals, or the information for determining the bandwidth information of the wireless interval by the gateway device, to claim 1, characterized in that notifies the gateway device The wireless communication system described. Bandwidth information of the wireless section, or, the information for determining the bandwidth information of the wireless interval by the gateway device further comprises a statistics item retrieval server acquired from the base station or the radio terminal;
The wireless communication system according to claim 1, wherein the gateway device collects bandwidth information of the wireless section via the statistical item acquisition server. The gateway in a wireless communication system comprising one or more base stations that communicate wirelessly with a wireless terminal and a gateway device that transmits packets to the wireless terminal via the base station according to a maximum bandwidth allocated to the wireless terminal A device,
An interface for communicating with the base station;
Each wireless terminal includes a processing unit that allocates the maximum bandwidth between the base station and the wireless terminal and between the base station and the gateway device,
Wherein the processing unit,
Based on the bandwidth information before Symbol base station or the radio section between the radio base station that is collected from the terminal and the wireless terminal, the base station each time the total amount of the maximum bandwidth allocated to the radio terminals belonging to a given base station or service Alternatively, the gateway device set for each service and assigns the maximum bandwidth between the base station and the wireless terminal and between the base station and the gateway device to each wireless terminal belonging to the base station based on the set total amount of the maximum bandwidth.

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