JP5017391B2 - Subscriber accommodation changing method, migration destination session control server device and management server - Google Patents

Description

  The present invention relates to a subscriber accommodation changing method, a migration destination session control server device, and a management server that can be migrated to a migration destination session control server device even when a failure occurs in the migration source session control server device. is there.

  In a communication network, with the increase of subscribers, renewal of equipment, etc., part or all of the subscribers controlled by one session control server device can be transferred to another session control server device. It becomes necessary. In such a case, it is important to make the transition so that the service to the subscriber is not interrupted.

  Conventionally, there is a technique disclosed in Patent Document 1 as a technique that allows a subscriber to be transferred from a session control server apparatus in use to a new session control server apparatus without interruption. In this technology, when a subscriber is migrated from an existing session control server device to a new session control server device, the access destination session control server device is changed from an existing session control server device to a new session control server device. In response to a call connection request from a migration target subscriber, a new session control server device accesses an existing session control server device and acquires subscriber data. As a result, the communication service control device can be transferred without interruption of the service to the transfer target person.

  However, when it is desired to transfer a subscriber due to a failure in the session control server device, it is difficult to transfer subscriber data from the session control server device to another session control server device. If the change cannot be made, the transfer cannot be made, and the routing change of the surrounding session control server devices including the failed session control server device requires maintenance operation. Further, when there is an incoming connection request to the migration target subscriber before the data migration of the migration target subscriber and it is necessary to refer to the subscriber data of the migration target subscriber at the time of connection, the session control server device in which a failure has occurred In the state where there is subscriber data, the new session control server device is routed, so that the subscriber data cannot be referred to and the service is interrupted.

JP 2002-252700 A

  The present invention has been made in view of the above problems, and the object of the present invention is to enable migration to a destination session control server device even when a failure occurs in the source session control server device. It is an object to provide a subscriber accommodation changing method, a transfer destination session control server device, and a management server.

In order to solve the above-described problem, the first aspect of the present invention provides a subscriber that the call processing system performs when the subscriber data stored in the migration source session control server device is stored in the migration destination session control server device. In the accommodation changing method, the call processing system includes the migration destination session control server device connected to a terminal device via an edge router, and a management server connected to the migration destination session control server device. The management server uses a subscriber data storage unit that stores subscriber data stored in the source session control server device, and is used for processing a call for the terminal device. Routing information storage for storing routing information when using the source session control server device for call routing The migration destination session control server device has a subscriber data storage unit for storing subscriber data used for processing a call for the terminal device, and the subscriber accommodation changing method includes: When the migration destination session control server apparatus receives a service change signal transmitted from the edge router at the timing of switching from the migration source session control server apparatus to the migration destination session control server apparatus, When the transfer destination session control server apparatus receives a response to the predetermined signal from the terminal apparatus, the subscriber data storage unit of the transfer destination session control server apparatus is referred to, and The migration destination session control server device determines that there is no corresponding subscriber data. If the management server requests subscriber data from the management server, and the management server requests subscriber data from the destination session control server device, the subscriber data storage unit of the management server If the management server is requested by subscriber data from the destination session control server device, the routing information storage unit stores the corresponding routing information. Change to routing information when using the migration destination session control server device, the migration destination session control server device receives subscriber data transmitted from the management server, and joins the migration destination session control server device Stored in a person data storage unit.

The second aspect of the present invention is a migration destination session control server device that receives and accumulates subscriber data accumulated in the migration source session control server device, wherein the migration destination session control server device is an edge router. And connected to a management server that transmits the subscriber data to the destination session control server device, and the management server is used for processing a call for the terminal device. that, routing when using the subscriber data storage unit to said transition subscriber data accumulated in the source session control server is stored, the migration source session control server regarding routing of calls for said terminal device A routing information storage unit for storing information and any one of the migration destination session control server device If requested, the subscriber data is read from the subscriber data storage unit and transmitted to the destination session control server device, and the routing information is stored in the routing information storage unit. While changing to routing information when using the session control server device, if routing information used for call processing is requested from the destination session control server device, the corresponding routing information is read from the routing information storage unit , and a transition subscriber control unit to be transmitted to the destination session control server, the migration destination session control server device, for storing subscriber data that is used to process the call for the terminal device a subscriber data storage unit, the transfer from the migration source session control server If earlier session control has received the service change signal transmitted from the edge router to the timing of switching to a server device, an address management unit that transmits a predetermined signal to the terminal device, the terminal a response to said predetermined signal If received from a device, refer to the subscriber data storage unit of the destination session control server device, determine the presence of the corresponding subscriber data, and if it is determined that there is no corresponding subscriber data, the management server A subscriber data control unit for receiving the corresponding subscriber data and storing the subscriber data in the subscriber data storage unit, and the subscriber data storage unit from the subscriber data storage unit when processing a call for the terminal device. And requesting the management server to receive the corresponding routing information, the subscriber data and the routing information And a session control unit that performs call processing using the.

The third aspect of the present invention is a management server for transmitting subscriber data stored in a migration source session control server device to a migration destination session control server device, wherein the migration destination session control server device is an edge router. And connected to the management server, and the management server is stored in the migration source session control server device used for call processing for the terminal device . A subscriber data storage unit for storing subscriber data, a routing information storage unit for storing routing information when using the transfer source session control server device relating to routing of calls for the terminal device, and the transfer source wherein the session control server apparatus the timing of switching to the destination session control server If any of the subscriber data is requested from the destination session control server device because the destination session control server device has received a service change signal transmitted from a message router, the subscriber data storage unit The subscriber data is read and transmitted to the destination session control server device, and the corresponding routing information in the routing information storage unit is changed to the routing information when the destination session control server device is used, If the routing information used for call processing is requested from the destination session control server device, the corresponding subscriber information is read from the routing information storage unit and transmitted to the destination session control server device; It is characterized by having.

The fourth aspect of the present invention is a subscriber accommodation changing method performed when the call processing system stores the subscriber data stored in the transfer source session control server device in the transfer destination session control server device, the call processing system comprises the a destination session control server connected to the terminal device via the edge router, and a management server connected to the destination session control server, the management server, the A subscriber data storage unit for storing subscriber data stored in the transfer source session control server device, used for call processing for the terminal device, and the transfer source for call routing for the terminal device A routing information storage unit for storing routing information when using the session control server device; The session control server device has a subscriber data storage unit for storing the subscriber data used for call processing for the terminal device, and the subscriber accommodation changing method includes the migration destination session control server device. The subscriber data stored in the source session control server device transmitted from the management server is stored in advance in the subscriber data storage unit of the destination session control server device, and the destination session is stored. If the control server device receives a service change signal transmitted from the edge router at the timing of switching from the migration source session control server device to the migration destination session control server device , all routing information is changed to the management server. The management server requests all routes from the migration destination session control server device. If a change in the ring information requested, and changes all routing information in the routing information storing unit to the routing information when using the migration destination session control server.

The fifth aspect of the present invention is a migration destination session control server device that receives and accumulates subscriber data accumulated in the migration source session control server device, wherein the migration destination session control server device is an edge router. Connected to the terminal device via the terminal, and connected to a management server that transmits the subscriber data to the destination session control server device, and
The management server includes a subscriber data storage unit for storing subscriber data stored in the source session control server device, which is used for processing a call for the terminal device, and a call for the terminal device. A routing information storage unit for storing routing information when using the migration source session control server device relating to the routing, and the routing information storage if a change of all routing information is requested from the migration destination session control server device All the routing information in the unit is changed to the routing information when using the destination session control server device, and if the routing information used for the call processing is requested from the destination session control server device, the routing information Read the relevant routing information from the accumulator and transfer And a transition subscriber control unit that transmits to the session control server, the migration destination session control server is used to process the call for the terminal device, and is transmitted from the management server, the transition A subscriber data storage unit in which subscriber data stored in the original session control server device is stored in advance, and the edge router at the timing of switching from the transfer source session control server device to the transfer destination session control server device If a service change signal to be transmitted is received, a subscriber data control unit requesting the management server to change all routing information, and a subscriber of the destination session control server device in processing a call for the terminal device Read subscriber data from the data storage unit and request the management server, Question receives routing information, and having a using the subscriber data and routing information session control unit for processing the call.

According to a sixth aspect of the present invention, there is provided a management server for transmitting subscriber data stored in a migration source session control server device to a migration destination session control server device, wherein the migration destination session control server device is an edge router. And connected to the management server, and the management server is stored in the migration source session control server device used for call processing for the terminal device. A subscriber data storage unit for storing subscriber data, a routing information storage unit for storing routing information when using the source session control server device relating to call routing for the terminal device, and the subscriber Subscriber data stored in the transfer source session control server device stored in the data storage unit Advance transmits to the destination session control server, the migration source session control server the migration destination session control server switching said destination session control server a service change signal transmitted from the edge router to the timing of the device from If a change of all routing information is requested from the migration destination session control server device because the device has received the routing information when using the migration destination session control server device, all routing information in the routing information storage unit On the other hand, when routing information used for call processing is requested from the migration destination session control server device, the routing information is read from the routing information storage unit and transmitted to the migration destination session control server device. Migration And having a subscriber controller.

  ADVANTAGE OF THE INVENTION According to this invention, even if it is a case where a failure generate | occur | produces in the transfer origin session control server apparatus, it becomes possible to transfer to a transfer destination session control server apparatus.

It is a connection diagram which shows the structural example of the call processing system which performs the subscriber accommodation change method which concerns on this Embodiment. It is a figure which shows the structural example of the session control server apparatus 2 and HSS3 in the call processing system of FIG. 3 is a flowchart showing an operation example of the session control server device 2 of FIG. 2. It is a flowchart which shows the operation example of HSS3 of FIG. It is a sequence chart which shows the operation example of the system of FIG.

  Hereinafter, a subscriber accommodation changing method, a migration destination session control server device, and a management server according to an embodiment of the present invention will be described with reference to the drawings.

  FIG. 1 is a connection diagram showing a configuration example of a call processing system that performs a subscriber accommodation changing method according to the present embodiment.

  The call processing system includes an edge router 1, a migration source session control server device 2a, and a migration destination session control server device 2b (hereinafter referred to as a session control server device 2 if it is not specified which session control server device is). And a management server (referred to as “Home Subscriber Server”, hereinafter referred to as “HSS”) 3, an OPS (Operation System) 4, and a plurality of terminal devices 5. The terminal device 5 is used by a subscriber.

  One of the migration source session control server device 2a and the migration destination session control server device 2b is connected to the edge router 1, the HSS 3 is connected to both the migration source session control server device 2a and the migration destination session control server device 2b, and the OPS 4 is Connected to the HSS 3, the terminal device 5 is connected to the edge router 1.

  The edge router 1 is an edge router device that transmits and receives packets between one of the migration source session control server device 2 a and the migration destination session control server device 2 b and the terminal device 5.

  The session control server device 2 is a server device having functions such as IP address distribution and accumulation of subscriber data transmitted from the HSS 3 and session control using a SIP (Session Initiation Protocol) signal. Details of the session control server device 2 will be described later.

  The HSS 3 is a server device that manages subscriber data, routing information, and the like. The routing information is information related to routing of calls transmitted and received by the terminal device 5. Details of HSS3 will be described later.

  The OPS 4 is a system having a function of setting subscriber data, routing information, and the like in the HSS 3.

  The terminal device 5 is a terminal device operated by a user who uses a communication service.

  In FIG. 1, there is one edge router 1 connected to the migration source session control server apparatus 2a or the migration destination session control server apparatus 2b, but there may be more.

  Further, although there is one terminal device 5 connected to the edge router 1, more terminals may exist.

  Next, functions of the call processing system will be described.

(Function of call processing system)
Based on the instruction from the OPS, the HSS 3 sets a flag indicating that it is a migration target person in the migration target person's subscriber data, and the migration target person and the migration destination session control server apparatus 2b that is the migration destination. Is stored.

  The destination session control server device 2b receives from the edge router 1 a service change signal indicating switching from the source session control server device 2a to the destination session control server device 2b, and then receives the DHCP signal from each subscriber terminal. Upon reception, the presence / absence of subscriber data for the subscriber is determined. If there is no subscriber data, the subscriber data is requested to the HSS 3. The service change signal is transmitted at the timing of switching, that is, the timing of using the destination session control server device.

  The HSS 3 confirms the validity, transmits the subscriber data to the migration destination session control server device 2b, and changes the routing information held by the HSS 3. Thereby, subscriber accommodation change is possible.

  Or the transfer destination session control server apparatus 2b will request the subscriber data of all transfer object persons from HSS3, if a service change signal is received.

  The HSS 3 confirms the validity, transmits the subscriber data, and changes the routing information.

  The HSS 3 transmits subscriber data before using the migration destination session control server device 2b, and all subscribers under the edge router are triggered when the migration destination session control server device receives the service change signal. The routing information can be changed.

  The call processing system changes the subscriber accommodation under various circumstances, that is, (1) all the subscribers accommodated in the migration source session control server device 2a can be migrated under a situation where a plan can be made in advance. When migrating to the session control server device 2b, (2) When migrating some subscribers accommodated in the source session control server device 2a to the destination session control server device 2b, (3) Source session control In addition to being applicable to a case where a subscriber connected to a specific edge router 1 connected to the server device 2a is migrated to the migration destination session control server device 2b, (4) there is a failure in the migration source session control server device 2a. A subscriber who is generated and suddenly accommodated in the source session control server device 2a is transferred to the destination session control server device 2b It can also be applied when necessary to have occurred. In this case, “subscriber migration” means that subscriber data is accumulated in the migration destination session control server device 2b.

  Hereinafter, a case where all the subscribers accommodated in the migration source session control server apparatus 2a are migrated to the migration destination session control server apparatus 2b will be described as an example. In particular, the session control server device 2 and the HSS 3 will be described.

  First, the configuration of the session control server device 2 and the HSS 3 will be described.

(Configuration of session control server device 2)
FIG. 2 is a diagram illustrating a configuration example of the session control server device 2 and the HSS 3 in the call processing system of FIG. FIG. 2 conceptually shows only the characteristic part of each device.

  The session control server device 2 includes an address management unit 21, a subscriber data control unit 22, a subscriber data storage unit 23, and a session control unit 24.

  The address management unit 21 receives the service change signal transmitted from the edge router 1 and transmits a reconfiguration request signal to all the terminal devices 5 connected to the edge router 1 by receiving the service change signal. Following the request signal, the terminal device 5 has a function of transmitting and receiving a signal by, for example, DHCP (Dynamic Host Configuration Protocol).

  When the subscriber data control unit 22 is notified by the address management unit 21 that the DHCP signal has been received, the subscriber data control unit 22 accesses the subscriber data storage unit 23 to determine whether there is subscriber data for the corresponding subscriber. If there is no subscriber data, the HSS 3 is requested, and the subscriber data transmitted from the HSS 3 is received and stored in the subscriber data storage unit 23.

  Further, when the subscriber data control unit 22 is notified that the service change signal has been received from the address management unit 21, the subscriber data control unit 22 requests the subscriber data of all the migration target persons from the HSS 3, and the subscriber data transmitted from the HSS 3 is transmitted. It has a function of receiving and storing in the subscriber data storage unit 23.

  The subscriber data storage unit 23 has a function of storing subscriber data.

When the session control unit 24 receives a signal called REGISTER (hereinafter, “REGISTER”) of the SIP signal, the session control unit 24 performs registration processing, and performs session establishment processing by receiving a signal called INVITE (hereinafter, “INVITE”). Has the function to perform. The session control unit 24 has a function of accessing the subscriber data storage unit 23 and acquiring subscriber data. The session control unit 24 has a function of accessing the routing information storage unit 32 of the HSS 3 and acquiring the corresponding routing information. In addition, the session control unit 24 has a function of performing a response process by receiving a signal called 200 OK (hereinafter, “200 OK”).
(Configuration of HSS3)
The HSS 3 includes a subscriber data storage unit 31, a routing information storage unit 32, a migration destination information storage unit 33, and a migration subscriber control unit 34.

  The subscriber data accumulating unit 31 has a function of accumulating subscriber data transmitted from the OPS 4 and setting a flag in the corresponding subscriber data when information on a transfer target person is transmitted.

  The routing information storage unit 32 has a function of storing routing information transmitted from the OPS 4.

  The routing information is initially used when the migration source session control server device 2a is used, and the routing information storage unit 32 is instructed to change the routing information from the migration subscriber control unit 34. Has the function of changing to the routing information when using the destination session control server apparatus 2b.

  The migration destination information accumulation unit 33 has a function of accumulating migration destination information transmitted from the OPS 4, that is, migration destination information indicating the terminal device 5 of the subscriber to be migrated and the migration destination session control server device 2b that is the migration destination. Have.

  When a signal requesting subscriber data is sent from the subscriber data control unit 22 of the session control server device 2, the migration subscriber control unit 34 accesses the subscriber data storage unit 31 and retrieves the corresponding subscriber data. If the flag is set and the migration destination information storage unit 33 is accessed to check whether it is consistent with the migration destination information (verification is confirmed), the subscriber data is transferred to the session control server device. 2 has a function of transmitting to the subscriber data control unit 22.

  Further, the transfer subscriber control unit 34 has a function of accessing the routing information storage unit 32 and changing the routing information.

  The transfer subscriber control unit 34 accesses the subscriber data storage unit 31 when a signal requesting subscriber data of all transfer target users is sent from the subscriber data control unit 22 of the session control server device 2. All of the subscriber data for which the flag is set is retrieved, the migration destination information storage unit 33 is accessed to check whether it is consistent with the migration destination information (confirmation of the validity), and if it is confirmed, the subscriber data Is transmitted to the subscriber data control unit 22 of the session control server device 2, and the routing information storage unit 32 is accessed to change the routing information.

  Next, operations of the session control server device 2 and the HSS 3 will be described.

(Operation of session control server device 2)
FIG. 3 is a flowchart showing an operation example of the session control server device 2 of FIG.

  The address management unit 21 receives the service change signal transmitted from the edge router 1 (step A1), and when the method is a request-by-request method (step A2), all terminal devices connected to the edge router 1 A reconfiguration request signal is transmitted to 5 (step A4).

  Subsequently, the subscriber data control unit 22 accesses the subscriber data storage unit 23 to determine whether there is subscriber data for the corresponding subscriber (step A5). The requested signal is transmitted (step A6).

  Then, the subscriber data control unit 22 receives the subscriber data transmitted from the HSS 3 (step A7) and stores it in the subscriber data storage unit 23 (step A8). Thereafter, the control shifts to step A9.

  On the other hand, when the method is the double-throw method in step A2, the subscriber data control unit 22 transmits a signal requesting the change of routing information of all transfer target persons to the HSS 3 (step A3), and thereafter, step A9. Control is transferred to.

  In the case of the double-throwing method, the subscriber data control unit 22 transmits a signal requesting the subscriber data of all transfer target persons to the HSS 3 in advance, and the transfer subscriber control unit 34 of the HSS 3 transmits the signal. The subscriber data storage unit 31 is accessed to retrieve all the subscriber data for which the flag is set, and the migration destination information storage unit 33 is accessed to check whether it is consistent with the migration destination information (validity If it is confirmed, the subscriber data is transmitted to the subscriber data control unit 22, and the subscriber data control unit 22 stores it in the subscriber data storage unit 23 in advance.

  Now, the session control unit 24 receives REGISTER of the SIP signal transmitted from the terminal device 5 (step A9), performs registration processing (step A10), receives INVITE (step A11), and performs session establishment processing. (Step A12) During processing, the subscriber data storage unit 23 is accessed to retrieve the subscriber data (step A13), and the HSS3 routing information storage unit 32 is accessed to obtain the corresponding routing information. (Step A14) and INVITE is transmitted (step A15). The subscriber data and routing information are used to process such calls.

  Upon receiving 200 OK transmitted from the session control server device (not shown) that has received the INVITE transmitted in step A11 (step A16), the session control unit 24 performs response processing (step A17), and transmits 200 OK ( Step A18).

(Operation of HSS3)
FIG. 4 is a flowchart showing an operation example of the HSS 3 of FIG.

  The subscriber data storage unit 31 stores subscriber data transmitted from the OPS 4 (step B1), and the routing information storage unit 32 is in a state of storing routing information transmitted from the OPS 4 (step B2). ), The subscriber data storage unit 31 sets a flag in the corresponding subscriber data based on the information of the transfer target person transmitted from the OPS 4 (step B3). The migration destination information storage unit 33 accumulates the migration destination information transmitted from the OPS 4 (Step B4).

  As a result, the subscriber data storage unit 31 stores the subscriber data stored in the source session control server apparatus 2a, and a flag is set in the subscriber data. The migration destination information storage unit 33 accumulates migration destination information indicating the subscriber terminal device 5 to be migrated and the migration destination session control server device 2b that is the migration destination.

  When the method is a request-by-request method (step B5), the migration subscriber control unit 34 receives a signal requesting subscriber data transmitted from the subscriber data control unit 22 of the session control server device 2 (step B5). B6) The subscriber data storage unit 31 is accessed to retrieve the corresponding subscriber data, and the flag is set (step B7), or the migration destination information storage unit 33 is accessed to determine the migration destination information of the corresponding subscriber. It confirms whether it is consistent (confirms the validity) (step B8), and if it is confirmed, the subscriber data is transmitted to the subscriber data control unit 22 of the session control server device 2 (step B9). The routing information storage unit 32 is accessed and the corresponding routing information is changed (step B10).

  In step B10, in other words, the routing information when using the migration source session control server apparatus 2a is changed to the routing information when using the migration destination session control server apparatus 2b.

  When the method is the double-throw method in Step B5, the transition subscriber control unit 34 requests a change of the routing information of all transition target persons transmitted from the subscriber data control unit 22 of the session control server device 2. When the signal is received (step B11), the subscriber data storage unit 31 is accessed to retrieve all the subscriber data for which the flag is set, and the migration destination information storage unit 33 is accessed to check whether it is consistent with the migration destination information. If it can be confirmed (step B12), the routing information storage unit 32 is accessed to change all relevant routing information (step B13).

  In addition, when routing information is requested from the session control unit 24 of the session control server device 2, the routing information storage unit 32 transmits the corresponding routing information to the session control unit 24 (step B14).

  Next, the operation of the call processing system will be described.

(Operation of call processing system)
FIG. 5 is a sequence chart showing an operation example of the call processing system of FIG.

  FIG. 5 shows a sequence among the terminal device 5, the edge router 1, the migration source session control server device 2a, the migration destination session control server device 2b, the HSS 3 and the OPS 4.

  Here, a request-by-request input method will be described as an example.

  The subscriber data storage unit 31 of the HSS 3 stores subscriber data transmitted from the OPS 4 (step C1), and the routing information storage unit 32 stores routing information transmitted from the OPS 4 (step C2). The subscriber data storage unit 31 sets a flag in the corresponding subscriber data based on the information of the transfer target person transmitted from the OPS 4 (step C3). The migration destination information storage unit 33 accumulates the migration destination information transmitted from the OPS 4 (Step C4).

  When the edge router 1 transmits a service change signal in response to the maintenance work of switching (step C5), the migration destination session control server device 2b receives this and transmits a reconfiguration request signal to the terminal device 5 (step S5). C6).

  The destination session control server device 2b receives the response from the terminal device 5 (step C7), determines whether or not there is subscriber data for the corresponding subscriber (step C8), and if not, joins the HSS3. A signal for requesting person data is transmitted (step C9).

  The HSS 3 receives this and confirms the validity (step C10), and if it is confirmed, transmits the subscriber data to the migration destination session control server device 2b (step C11).

  The destination session control server device 2b receives and accumulates subscriber data (step C12).

  On the other hand, when the subscriber data is transmitted in step C11, the HSS 3 changes the corresponding routing information (step C13).

  When the terminal device 5 transmits REGISTER (step C14), the migration destination session control server device 2b receives this, performs a registration process, and transmits 200 OK (1) to the terminal device 5 (step C15).

  Upon receiving this, the terminal device 5 transmits INVITE (1) (step C16).

  The migration destination session control server apparatus 2b receives this, performs session establishment processing, and accesses the subscriber data storage unit 23 to retrieve the subscriber data during processing (step C17), and the HSS3 routing information storage unit 32, the corresponding routing information is acquired (step C18), and INVITE is transmitted (step C19).

  The session control unit 24 receives 200OK (2) transmitted from the session control server device (not shown) that has received the INVITE transmitted in step C19 (step C20), performs response processing, and performs 200OK (3). This is transmitted (step C21), and this is received by the terminal device 5.

  As described above, according to the present embodiment, call processing is not complicated, maintenance operation is small, and the terminal device can be switched to a destination, and further planning in advance such as division, relocation, and accommodation replacement. The service is interrupted because there are few maintenance operations even when switching to the destination session control server device due to a failure in the source session control server device, which is not limited to the migration that can be done in advance, and the plan is not planned in advance. The time can be shortened.

  Specifically, as described above, the subscriber accommodation changing method is performed when the call processing system stores the subscriber data accumulated in the migration source session control server apparatus 2a in the migration destination session control server apparatus 2b. Is.

  The call processing system includes at least a migration destination session control server device 2b connected to the terminal device 5 via the edge router 1, and an HSS 3 (management server) connected to the migration destination session control server device 2b. Is done.

  In the case of the request-by-request method, the management server stores a subscriber data storage unit 31 in which subscriber data used for call processing for the terminal device 5 is stored, and a migration source session for call routing for the terminal device 5. At least a routing information storage unit 32 for storing routing information when using the control server device 2a is provided, and the transfer destination session control server device 2b stores subscriber data used for call processing for the terminal device 5. It has a subscriber data storage unit 23 for storage.

  In the case of the request-by-request method, the subscriber accommodation changing method receives the service change signal transmitted from the edge router 1 when the migration destination session control server device 2b uses the migration destination session control server device 2b. If so (FIG. 3: A1, FIG. 5: C5), a predetermined signal (reconfiguration request) is transmitted to the terminal device 5 (FIG. 3: A4, FIG. 5: C6), and the migration destination session control server device 2b Is received from the terminal device 5 (FIG. 5: C7), the subscriber data storage unit 23 is referred to determine the presence or absence of the corresponding subscriber data (FIG. 3: A5, FIG. 5: C8). If it is determined that there is no corresponding subscriber data, the migration destination session control server device 2b requests subscriber data from the management server (FIG. 3: A6, FIG. 5: C9). SE If the subscriber data is requested from the session control server device 2b, the corresponding subscriber data is read from the subscriber data storage unit 31 and transmitted to the destination session control server device 2b (FIG. 4: B9, FIG. 5: C11). ) If the management server has requested subscriber data from the destination session control server device 2b (FIG. 3: A6, FIG. 4: B6, FIG. 5: C9), the routing information accumulating unit 32 executes the corresponding routing information. Is changed to routing information when using the destination session control server device 2b (FIG. 4: B10, FIG. 5: C13), and the destination session control server device 2b receives the subscriber data transmitted from the management server. (FIG. 3: A7), and is stored in the subscriber data storage unit 23.

  In the case of the request-by-request method, the transfer destination session control server device 2b includes a subscriber data storage unit 23 for storing subscriber data used for call processing for the terminal device 5, and a transfer destination session control. If the service change signal transmitted from the edge router 1 is received at the timing of using the server device 2b, the address management unit 21 that transmits a predetermined signal to the terminal device 5 and the response to the predetermined signal are received from the terminal device. If it is determined that there is no corresponding subscriber data by referring to the subscriber data storage unit 23, and it is determined that there is no corresponding subscriber data, the management server is requested to receive the corresponding subscriber data. The subscriber data storage unit 23 adds data to the subscriber data control unit 22 to be stored in the subscriber data storage unit 23 and the terminal device 5. The subscriber data is read (FIG. 3: A13), requested to the management server, the corresponding routing information is received (FIG. 3: A14), and the call processing (FIG. 3) is performed using the subscriber data and the routing information. : At least a session control unit 24 that performs A15 to A18).

  In addition, in the case of the request-by-request method, the management server shifts the subscriber data storage unit 31 in which subscriber data used for call processing for the terminal device 5 is stored and the call routing for the terminal device 5. A routing information storage unit 32 that stores routing information when using the original session control server device 2a, and a service change signal transmitted from the edge router 1 at the timing when the transfer destination session control server device 2b is used are transferred to the transfer destination session. If any subscriber data is requested from the migration destination session control server device 2b as a result of the reception by the control server device 2b, the corresponding subscriber data is read from the subscriber data storage unit 31, and the migration destination session control server And the corresponding information in the routing information storage unit 32 If the routing information used for the call processing is requested from the migration destination session control server device 2b while the routing information is changed to the routing information when the migration destination session control server device 2b is used, the routing information storage unit 32 It is configured to have at least a migration subscriber control unit 34 that reads out the corresponding routing information and transmits it to the migration destination session control server device 2b.

  On the other hand, in the case of the double-throwing method, the management server has at least a routing information storage unit 32 that stores routing information when using the source session control server device 2a regarding the routing of calls for the terminal device 5, The destination session control server device 2b is configured to have at least a subscriber data storage unit 23 for storing subscriber data used for processing a call for the terminal device 5.

  In the case of the double throw-in method, the subscriber accommodation changing method is such that the migration destination session control server device 2b accumulates subscriber data transmitted from the management server in the subscriber data storage unit 23 in advance, If the session control server device 2b receives the service change signal transmitted from the edge router 1 at the timing of using the migration destination session control server device 2b (FIG. 3: A1, FIG. 5: C5), all routings are sent to the management server. If a change of information is requested (FIG. 3: A3, FIG. 4: B11), and the management server is requested to change all routing information from the migration destination session control server device 2b, all routing information in the routing information storage unit 32 Is changed to routing information when the migration destination session control server apparatus 2b is used. In this case, all routing information is routing information for all transfer target persons.

  In the case of the double-throwing method, the transfer destination session control server device 2b includes a subscriber data storage unit 23 in which subscriber data used for processing a call for the terminal device 5 is stored in advance, and a transfer destination session control. If the service change signal transmitted from the edge router 1 is received at the timing of using the server device 2b, the subscriber data control unit 22 that requests the management server to change all routing information and the call processing for the terminal device 5 At the time, the session control unit reads out the subscriber data from the subscriber data storage unit 23, requests the management server to receive the corresponding routing information, and processes the call using the subscriber data and the routing information. 24 at least.

  In the case of the double-throwing method, the management server includes a routing information storage unit 32 for storing routing information when using the source session control server device 2a related to the routing of calls for the terminal device 5, and a destination session. The destination session control server device 2b received a service change signal transmitted from the edge router 1 at the timing of using the control server device 2b, so that the destination session control server device 2b was requested to change all routing information. Then, all routing information in the routing information storage unit 32 is changed to routing information when the migration destination session control server apparatus 2b is used, while the migration destination session control server apparatus 2b requests routing information used for call processing. If the routing information storage unit 3 It reads routing information of the from, and a transition subscriber control unit 34 to be transmitted to the destination session control server 2b so as to have at least.

  A computer program for causing a computer to execute the subscriber accommodation changing method according to the present embodiment, a computer program for causing a computer to function as the migration destination session control server apparatus 2b, and a computer functioning as an HSS 3 (management server). Can be recorded on a computer-readable recording medium such as a semiconductor memory, a magnetic disk, an optical disk, a magneto-optical disk, a magnetic tape, etc., and can be transmitted through a communication network such as the Internet and widely distributed. Can be made.

DESCRIPTION OF SYMBOLS 1 ... Edge router 2 ... Session control server apparatus 2a ... Migration origin session control server apparatus 2b ... Migration destination session control server apparatus 3 ... HSS (management server)
4 ... OPS
DESCRIPTION OF SYMBOLS 5 ... Terminal device 21 ... Address management part 22 ... Subscriber data control part 23 ... Subscriber data storage part 24 ... Session control part 31 ... Subscriber data storage part 32 ... Routing information storage part 33 ... Migration destination information storage part 34 ... Transition subscriber control unit

Claims (9)

A call processing system is a subscriber accommodation changing method that is performed when subscriber data stored in a transfer source session control server device is stored in a transfer destination session control server device,
The call processing system includes the migration destination session control server device connected to a terminal device via an edge router, and a management server connected to the migration destination session control server device,
The management server
A subscriber data storage unit for storing the subscriber data stored in the source session control server device, which is used for processing a call for the terminal device;
A routing information storage unit for storing routing information when using the migration source session control server device related to the routing of calls for the terminal device;
The migration destination session control server device
A subscriber data storage unit for storing subscriber data used for processing a call for the terminal device;
The subscriber accommodation change method is:
When the migration destination session control server apparatus receives a service change signal transmitted from the edge router at the timing of switching from the migration source session control server apparatus to the migration destination session control server apparatus, Send a signal of
When the migration destination session control server device receives a response to the predetermined signal from the terminal device, the subscriber data storage unit of the migration destination session control server device is referred to determine whether there is corresponding subscriber data. And
If the destination session control server device determines that there is no corresponding subscriber data, it requests subscriber data from the management server;
When the management server receives subscriber data from the destination session control server device, the management server reads the corresponding subscriber data from the subscriber data storage unit of the management server and transmits it to the destination session control server device. ,
If the management server is requested by subscriber data from the destination session control server device, the routing information storage unit changes the corresponding routing information to the routing information when using the destination session control server device. And
The migration destination session control server device receives subscriber data transmitted from the management server and stores the subscriber data in a subscriber data storage unit of the migration destination session control server device. A migration destination session control server device that receives and accumulates subscriber data accumulated in the migration source session control server device,
The migration destination session control server device is connected to a terminal device via an edge router, and is connected to a management server that transmits the subscriber data to the migration destination session control server device, and
The management server
A subscriber data storage unit for storing the subscriber data stored in the source session control server device, which is used for processing a call for the terminal device;
A routing information accumulating unit for accumulating routing information when using the source session control server device relating to call routing for the terminal device;
When any subscriber data is requested from the migration destination session control server device, the corresponding subscriber data is read from the subscriber data storage unit, transmitted to the migration destination session control server device, and the routing information While changing the corresponding routing information in the storage unit to the routing information when using the migration destination session control server device, if the routing information used for the call processing is requested from the migration destination session control server device, reads routing information of the from routing information storage unit, and a transition subscriber control unit to be transmitted to the destination session control server,
The migration destination session control server device
A subscriber data storage unit for storing subscriber data used for processing a call for the terminal device;
If a service change signal transmitted from the edge router is received at the timing of switching from the migration source session control server device to the migration destination session control server device, an address management unit that transmits a predetermined signal to the terminal device; ,
If a response to the predetermined signal is received from the terminal device, the subscriber data storage unit of the destination session control server device is referred to determine whether there is corresponding subscriber data, and there is no corresponding subscriber data. If it is determined, a request to the management server, the corresponding subscriber data is received, a subscriber data control unit to be stored in the subscriber data storage unit,
When processing a call for the terminal device, the subscriber data is read out from the subscriber data storage unit, requested to the management server, the corresponding routing information is received, and the subscriber data and the routing information are used. And a session control unit that performs call processing. A management server that transmits subscriber data stored in the migration source session control server device to the migration destination session control server device,
The migration destination session control server device is connected to a terminal device via an edge router, connected to the management server, and
The management server
A subscriber data storage unit for storing the subscriber data stored in the source session control server device, which is used for processing a call for the terminal device;
A routing information accumulating unit for accumulating routing information when using the source session control server device relating to call routing for the terminal device;
The migration destination session control server device receives the service change signal transmitted from the edge router at the timing of switching from the migration source session control server device to the migration destination session control server device. If any subscriber data is requested from the server device, the corresponding subscriber data is read from the subscriber data storage unit and transmitted to the destination session control server device. While changing the routing information to the routing information when using the migration destination session control server device, if the routing information used for the call processing is requested from the migration destination session control server device, from the routing information storage unit Corresponding routing information Out look, management server; and a transition subscriber control unit to be transmitted to the destination session control server. A call processing system is a subscriber accommodation changing method that is performed when subscriber data stored in a transfer source session control server device is stored in a transfer destination session control server device,
The call processing system includes the migration destination session control server device connected to a terminal device via an edge router, and a management server connected to the migration destination session control server device,
The management server
A subscriber data storage unit for storing the subscriber data stored in the source session control server device, which is used for processing a call for the terminal device;
A routing information storage unit for storing routing information when using the migration source session control server device related to the routing of calls for the terminal device;
The migration destination session control server device
A subscriber data storage unit for storing subscriber data used for processing a call for the terminal device;
The subscriber accommodation change method is:
The migration destination session control server apparatus stores in advance subscriber data stored in the migration source session control server apparatus, which is transmitted from the management server, in a subscriber data storage unit of the migration destination session control server apparatus. Leave
When the migration destination session control server apparatus receives a service change signal transmitted from the edge router at the timing of switching from the migration source session control server apparatus to the migration destination session control server apparatus, Request changes to routing information,
If the management server is requested to change all routing information from the migration destination session control server device, it changes all routing information in the routing information storage unit to routing information when using the migration destination session control server device. A subscriber accommodation changing method characterized by: A migration destination session control server device that receives and accumulates subscriber data accumulated in the migration source session control server device,
The migration destination session control server device is connected to a terminal device via an edge router, and is connected to a management server that transmits the subscriber data to the migration destination session control server device, and
The management server
A subscriber data storage unit for storing the subscriber data stored in the source session control server device, which is used for processing a call for the terminal device;
A routing information accumulating unit for accumulating routing information when using the source session control server device relating to call routing for the terminal device;
If a change of all routing information is requested from the migration destination session control server device, all routing information in the routing information storage unit is changed to routing information when using the migration destination session control server device, while the migration When the routing information used for call processing is requested from the destination session control server device, the corresponding routing information is read from the routing information storage unit, and is transmitted to the destination session control server device. Have
The migration destination session control server device
A subscriber data storage unit used for processing a call about the terminal device and transmitted from the management server and stored in advance in the transfer source session control server device ;
If a service change signal transmitted from the edge router is received at the timing of switching from the migration source session control server device to the migration destination session control server device, a subscriber who requests the management server to change all routing information A data control unit;
In processing a call for the terminal device, the subscriber data is read from the subscriber data storage unit of the destination session control server device, and requested to the management server to receive corresponding routing information. And a session control unit that performs call processing using data and routing information. A management server that transmits subscriber data stored in the migration source session control server device to the migration destination session control server device,
The migration destination session control server device is connected to a terminal device via an edge router, connected to the management server, and
The management server
A subscriber data storage unit for storing the subscriber data stored in the source session control server device, which is used for processing a call for the terminal device;
A routing information accumulating unit for accumulating routing information when using the source session control server device relating to call routing for the terminal device;
The subscriber data stored in the transfer source session control server device stored in the subscriber data storage unit is transmitted in advance to the transfer destination session control server device, and from the transfer source session control server device to the transfer Request of change of all routing information from the destination session control server device when the destination session control server device receives the service change signal transmitted from the edge router at the timing of switching to the destination session control server device If so, the routing information storage unit changes all routing information to routing information when using the migration destination session control server device, while routing information used for call processing from the migration destination session control server device. If requested, Reads routing information of the from quenching information storage unit, the management server, characterized by having said destination session control server migration subscriber control unit to send to.   A computer program for causing a computer to execute the subscriber accommodation changing method according to claim 1.   The computer program for functioning a computer as a transfer destination session control server apparatus of Claim 2 or 5.   A computer program for causing a computer to function as the management server according to claim 3.

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