JP3472975B2 - Resource initialization method for distributed processing type service control station - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a resource initialization method for a distributed processing type service control station connected to a network in an intelligent network having a service control station composed of a plurality of processors. The present invention relates to a resource releasing method in the initial stage of a distributed processing type service control station capable of preventing the state in which the security is secured from continuing.

[0002]

2. Description of the Related Art Conventionally, a service control station of an intelligent network, while communicating with an exchange,
It is configured to secure resources such as a memory area for a call and to control the call. In that case, if the corresponding switch cannot continue to control a specific call related to the switch due to a partial failure, etc., it is included in the resource release request signal issued by the switch. Using the conversation ID given by the service control station as the key information, the resource captured for controlling the corresponding call is released and the resource can be reused for another call control. . Further, conventionally, it has been considered to configure the service control station with a plurality of processors. In that case, the configurations of these processors can be hidden from the exchange. When the configuration of the processor is hidden, there is an advantage that the exchange does not need to manage the data to be aware of the individual processors that configure the service control station, but on the other hand, the resource is released (initial setting) as described above. When it becomes necessary to request the resource release request signal (initialization request signal), the processor to which the resource release request signal is issued becomes unknown.

Therefore, even when the initial setting request signal is broadcast to all the processors constituting the service control station, since each processor independently issues the conversation ID, the conventional service control is performed. The method using the conversation ID issued by the station as a key has a first problem that an incorrect resource is initialized. Further, in order to avoid the first problem described above, on the service control station side,
Dialog ID issued by the service control station when the dialog was established
Besides, it is possible to specify a call to be initialized by using the conversation ID issued by the exchange as key information, but even in a processor that does not need to initialize resources, an initialization request from the exchange is generated. There is a second problem that it is necessary to perform an invalid search process. Incidentally, the concealment of the processor configuration of the service control station described here means that the ID and communication address of the processor configuring the service control station are not set as fixed information in the exchange. In other words, even if a service control station has been constructed to increase or decrease the number of constituent processors, if a system configuration is constructed that "there is no need to manually reset the data in the exchange", It is called that the processor configuration of the service control station is hidden from the exchange.

[0004]

As described above, according to the conventional method, when a plurality of processor configurations of a distributed processing type service control station are hidden from a switch, a specific call managed by a specific processor is processed. Therefore, there is the first problem that the switching device cannot notify the request for initial setting of the captured resource. Also, the first
In order to solve the above problem, when the initialization request signal including the conversation ID issued by the service control station and the exchange has been broadcast to all the processors forming the service control station, the initialization process must be performed. A second problem has arisen in that it is necessary to execute a search process for an invalid call for initial setting even in a processor that does not have this. Therefore, when the processor configuration of the service control station is hidden from the exchange, how to release the resource becomes an issue.

Therefore, an object of the present invention is to solve these conventional problems and to provide an efficient resource initializing method for the service control station when the processor configuration of the distributed processing type service control station is hidden from the exchange. To provide.

[0006]

In order to achieve the above object, in a resource initializing method for a distributed processing type service control station according to the present invention, first, a communication control processor (201 in FIG. 1) that shares communication control is Manages the processor configuration of its own service control station and the communication address of each processor (202), and the service control station (100) controls the exchange and the service control station when a call control request is issued from the exchange. When establishing a dialogue between the two, a dialogue ID for identifying each dialogue and a processor (20) for controlling the call.
The ID of 2) is set in the dialogue establishment response signal from the service control station to the exchange, and when the exchange establishes a dialogue with the service control station, the processor ID notified from the service control station is set. When the switch manages the dialog corresponding to the conversation ID and detects that the processing of a specific intelligent network call cannot be continued, an initialization request signal is sent to the dialog corresponding to the call to be initialized. (In this, the conversation ID and the processor ID are set), and the communication control processor (201) of the service control station (100) sends an initial setting request signal from the exchange (300). When received, the processor ID set in the initialization request signal is read out and initialization is required toward the communication address of the corresponding processor (202). Processor to transfer signals, received an initial setting request signal (the 202)
Then, the resource managed in the own processor (202) is extracted from the dialogue ID included in the initialization request signal, the related resource is initialized, and the result of the initialization process is the transfer source. The communication control processor (201) that has returned the response to the initial setting request signal to the processor (201) and has received the response from the transfer destination processor (202) is the exchange that issued the initial setting request signal. (300) returns a response to the initial setting request signal. As a result, the resources in the distributed processing type service control station corresponding to a specific intelligent network service control call can be initialized while hiding the processor configuration of the distributed processing type service control station from the exchange.

[0007]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described in detail below with reference to the drawings. FIG. 1 is a configuration diagram of a service control station using a distributed module configuration showing an embodiment of the present invention. In FIG. 1, 100 is a service control station adopting a distributed module configuration, 300 is an exchange, 201 is a communication control processor that controls communication between the exchange 300 and the own service control station 100, and a plurality of them are installed as necessary. It is possible to Communication control processor 201
Manages the processor configuration in its own service control station 100, the processor ID of each processor, and the corresponding communication address. Further, reference numeral 202 denotes a service control processor group including a plurality of processors for performing service control, and each processor constituting the service control processor group 202 independently has a resource 210 necessary for service control (call control). Is managing. The service control station 100 includes these distributed modules (communication control processor 201, service control processor group 202).
It is composed by.

The exchange 300 controls a communication path corresponding to a call between terminals. When the exchange 300 detects an intelligent network service call, it notifies the service control station 100 of the occurrence of the call. Service control station 10
In 0, when a service call is notified, the control of the call is appropriately distributed to each processor of the service control processor group 202 by the communication control processor 201, and unused in each processor of the service control processor group 202. An appropriate type of resource is captured from among the service control resources 210, and used for service control. Normally, when the service control ends, the captured resource is released.

FIG. 2 is a sequence chart of service control by the exchange and the service control station according to the present invention. When a service control request signal 401 is issued from the exchange 300 to the service control station 100, the communication control processor 201 in the service control station 100 first receives the service control request signal 401 and the service control processor group 202 of the service control processor group 202 is received. Any one of the service control processors 2021 is determined (step 601),
Service control request signal 4 to this processor 2021
Transfer as 02. This service control request signal 402
The service control processor 2021 that has received the request secures the resources necessary for performing the service control, and issues the dialog ID corresponding to the received service control request (step 602). The service control processor 2021 generates a response signal 403 corresponding to the service control signal received in accordance with a predetermined service control procedure, and uses the dialogue ID and its own processor ID.
To the response signal 403, and the communication control processor 2
A response signal is returned to the exchange 300 via 01. Here, the response signal received by the exchange 300 is 4
04.

The exchange 300 which receives the response signal 404
Stores the dialog ID and the processor ID set in the response signal 404 in the memory secured for the call (step 603). After that, the service control station 1
When communicating with 00, the dialog ID and the processor ID are set in the signal, and a series of service control is executed (step 604). At the end of the conversation corresponding to the normal service control request signal, that is, at the end of the service, the exchange 300 issues a service control end signal 406 to the service control station 100, and upon reception of this signal, the service control processor is triggered. The 2021 releases the resource reserved for the service control (step 605) and returns the response signal 407 to the exchange 300.

FIG. 3 is a sequence chart of resource initial setting of the distributed processing type service control station according to the present invention. When the exchange 300 transmits an initial setting request signal 501 including the conversation ID and the processor ID that is the identifier of the service control processor 2021 to the service control station 100 side, the communication control processor 20 that has received this signal.
1 issues an initial setting request signal 502 to the service control processor 2021 corresponding to the processor ID set in this signal. When the service control processor 2021 receives the initial setting request signal 502, the service controlling processor 2021 identifies the corresponding resource from the conversation ID set in this signal, and releases them (initial setting processing).
Is executed (step 610).

In the service control processor 2021,
When the initial setting process is completed, the communication control processor 201 outputs a response signal 503 corresponding to the initial setting request signal 502.
It returns to the exchange 300 via. In the exchange 300,
The reception of the response signal 504 to the initial setting request signal 501 issued first is monitored, and if the response signal 504 is not received even after the elapse of a predetermined fixed time, or the processing of the response signal to the initial setting request signal 501 is performed. If the result is unsuccessful, it is possible to retransmit the initialization request signal 501 to the communication control processor 201 of the service control station 100. It is also possible to execute this retransmission processing a predetermined number of times.

[0013]

As described above, according to the present invention,
While hiding the processor configuration of the distributed processing type service control station from the exchange, it is possible to efficiently initialize the resources in the distributed processing type service control station corresponding to a specific intelligent network service control call. .

[Brief description of drawings]

FIG. 1 is an internal configuration diagram of a distributed processing type service control station to which the present invention is applied.

FIG. 2 is a signal sequence chart between an exchange and a service control station showing an embodiment of the present invention.

FIG. 3 is an operation sequence chart when resource initialization is performed according to an embodiment of the present invention.

[Explanation of symbols]

101-103 ... Service control station, 201 ... Communication control processor of service control station, 202 ... Service control processor group of service control station, 2021 ... Arbitrary service control processor of service control station, 210 ... Service control processor Managed by the switch, 300 ... Exchange, 401 ... Service control request signal from exchange to service control station, 402 ... Service control request signal from communication control P to service control P, 403 ... Response of service control request signal 402 Signals, 404 ... Response signal of service control request signal 401, 406 ... Service control end signal from exchange to service control station, 407 ... Response signal of service control end signal from service control P to exchange, 501 ... From exchange Initialization request signal, 502 ... Communication control P From the service control P to the communication control P, a response signal of the initialization request signal from the service control P to the communication control P, and a response signal 504 from the service control station to the exchange.

─────────────────────────────────────────────────── ─── Continuation of front page (72) Inventor Shuji Ezaki 3-19-2 Nishishinjuku, Shinjuku-ku, Tokyo Nihon Telegraph and Telephone Corporation (72) Inventor Mitsuyasu Ogawa 4 Ueodachu, Nakahara-ku, Kawasaki-shi, Kanagawa 1-1-1, Fujitsu Limited (72) Inventor Shinsuke Kanai 216 Totsuka-cho, Totsuka-ku, Yokohama-shi, Kanagawa Hitachi, Ltd. Information & Communication Division (56) Reference JP-A-7-226797 (JP, A) JP-A-7-170342 (JP, A) (58) Fields investigated (Int.Cl. ⁷ , DB name) H04M 3/42 H04Q 3/545

Claims (2)

(57) [Claims] 1. A service control station composed of a plurality of independent processors and an exchange are connected via a signal transfer network, and the service control station secures for executing call processing. A resource initializing method for initializing a resource in response to a request from the exchange, wherein a processor controlling a corresponding call among a plurality of processors constituting the service control station is the exchange and the service control station. When setting up a conversation for call control between the two, informing the exchange of the ID indicating the processor controlling the call and the ID issued by the processor controlling the call to identify the conversation. The exchange manages the notified ID indicating the processor and the ID identifying the dialogue, and the processing of the specific call cannot be continued when executing the call processing. If it is detected,
Issuing to the service control station an initialization request signal of a resource including an ID indicating a processor corresponding to a call to be initialized and an ID identifying a dialogue; and one processor in the service control station, I, which receives a signal and indicates a processor from the signal
Determining D and transferring the initialization request signal to the call control processor indicated by the ID, the call control processor extracting an ID specifying a dialog from the initialization request signal, and executing the dialog. Initialize the resource corresponding to the call related to, and when the initialization is completed,
Transferring a response signal of completion of the initialization to the one processor, and the processor, when receiving the response signal, returns a response signal to the exchange to the exchange. A method for initializing resources of a distributed processing type service control station, comprising: 2. The resource initialization method for a distributed processing type service control station according to claim 1, wherein the exchange monitors a response signal to an initialization request signal transmitted to the service control station, and a predetermined time elapses. Even if the response signal is not received or the processing result of the response signal fails, the resource of the distributed processing type service control station is characterized in that the initialization request signal is retransmitted a predetermined number of times. Initial setting method.