JP5472989B2 - Method and system for relocating service components in application server - Google Patents

Description

  The present invention relates to a technology for providing a service to a user terminal in cooperation with a communication network operated and managed by a communication carrier and an information network such as the Internet.

  FIG. 1 is a system configuration diagram in the prior art.

  FIG. 1 shows a communication network system via an IMS (IP Multimedia Subsystem) / MMD (MultiMedia Domain) core network (IP (Internet Protocol) subsystem network, hereinafter referred to as “IMS network”) 4. The IMS network 4 is managed and managed by a telecommunications carrier and includes a plurality of call session control functions (CSCF (Call Session Control Function)). In the IMS network 4, messages based on SIP (Session Initiation Protocol) are exchanged.

  A plurality of access networks belonging to different domains are connected to the IMS network 4 via an access router AR (Access Router). The access network is, for example, a mobile phone network or a wireless / wired broadband access network. A terminal (User Equipment) 5 connects to an access point (Previous Access Point) connected to an access network via a wireless / wired link. As a result, the terminal 5 can be connected to the IMS network 4 via the access network. The terminal 5 has a SIP client function and can exchange a SIP message with the IMS network 4.

  In order to manage the domain of the access network, the IMS network 4 includes a plurality of P-CSCF (Proxy-CSCF) 3 and S-CSCF (Serving-CSCF) 2 as call session control functions, and an application server (AS (Application Server)) 1.

  The SIP service request message transmitted from the terminal 5 is received by the P-CSCF 3 of the IMS network 4 via the access network. The P-CSCF 3 extracts media information for each session, and instructs gate control and resource control for the access router when the session is established. The P-CSCF 3 is determined at the time of location registration from the terminal 5 and establishes a secure IPsec tunnel with the terminal 5. Then, the P-CSCF 3 transfers the SIP message received from the terminal 5 to the S-CSCF 2.

  The S-CSCF 2 is a central SIP server for service execution and call session control. The S-CSCF 2 has a domain managed by itself, and controls a SIP-URI (SIP-Uniform Resource Identifier) within the domain. The S-CSCF 2 is connected to an application server 1 that provides an application level service and an HSS (Home Subscriber Server) that manages subscriber profile information and performs user authentication.

  Conventionally, a service providing apparatus connected between a communication network and an information network and a user terminal, and a technique for executing a combination of the communication network function and the information network function based on a service request message received from the user terminal (See, for example, Patent Document 1). According to this technology, when the service providing apparatus executes the authentication process, a safe and efficient network service is provided by combining different network functions.

  In addition, there is a technology that includes a network service platform between a communication network and an information network (see, for example, Patent Document 2). According to this technology, the network service platform can use different network functions in cooperation with each other by performing protocol conversion and data conversion.

  According to the techniques described in Patent Documents 1 and 2, it is assumed that an IMS network function (communication network function) and an Internet function (information network function) are linked to each other to provide a service.

JP 2008-217111 A JP 2008-118520 A

  In recent years, there are many cases in which a service function of a server connected to an information network is used from a terminal connected to a communication network. In response to the service request message transmitted from the terminal, the application server connected to the IMS network uses the function of the Web server connected to the Internet. It is assumed that the processing load on the application server is concentrated due to the increase of such usage forms. In particular, when a cloud computing system that will be developed in the future is applied, it becomes a more remarkable problem.

  On the other hand, according to the IMS network, the application server is connected to the S-CSCF, and exists as a service centralization and continuity application server (SCC-AS) for each service function. Therefore, application servers are not assumed to be distributed. A specific service request message may be concentrated on one application server, and the application server needs to include a general-purpose computer capable of high-speed arithmetic processing. This leads to high cost. However, user demand varies with time and the maximum processing capacity of the application server is not always required.

  In some cases, an SDP (Service Delivery Platform) server is used as the application server. SDP is an architecture that provides new services easily and efficiently by linking service components (also referred to as service components or enablers) such as user location information and presence. According to an SDP server based on SOA (Service Oriented Architecture), service components are linked according to a scenario in which their execution order is described. Generally, since a dedicated server is provided for each service function, depending on the processing capability and logical position of each dedicated server, the execution time of only a specific service function may be long.

  SUMMARY OF THE INVENTION An object of the present invention is to provide a method and system capable of increasing or decreasing the maximum processing capacity in an application server of an IMS network and allocating the service function to an efficient hardware processor device.

According to the present invention, in a method for relocating service components in a system in which a call session control function server and an application server are connected via an IP subsystem network,
The application server is composed of a plurality of processor devices connected via a local network, and the processor device can execute a plurality of service objects as service components,
When the call session control function server receives the service request message from the terminal, the first step of transferring the service request message to the first processor device of the application server based on a preset filter condition;
A second step in which the first processor device of the application server executes a plurality of service components corresponding to the service request message and measures an execution time for each service component;
A third step in which the first processor device of the application server returns a service response message including an execution time for each service component to the call session control function server;
The call session control function server determines, based on the execution time for each service component, whether or not to relocate the service component of the first processor device to the second processor device;
When the call session control function server determines to relocate, a fifth step of transmitting a relocation request message to the first processor device of the application server;
The first processor device of the application server has a sixth step of transferring a service component based on the relocation request message to the second processor device via the local network.

According to another embodiment of the service component relocation method of the present invention,
Regarding the second step, the first processor device of the application server further converts a received service request message into an object message as a part of the service component, and further includes a protocol processing component that transfers the object message between the service components. Have
Regarding the sixth step, when the protocol processing component of the first processor device is relocated to the second processor device, the call session control function server receives the service request message received from the terminal as the second of the application server. It is also preferable to update the filter conditions so that they are transferred to the other processor unit.

According to another embodiment of the service component relocation method of the present invention,
For the second step, the first processor device of the application server
Select the service scenario corresponding to the service request message,
It is also preferable to transfer the object message so that the specified service component is executed according to the execution procedure described in the service scenario.

According to another embodiment of the service component relocation method of the present invention,
The IP subsystem network is an IMS (IP Multimedia Subsystem) / MMD (MultiMedia Domain) core network,
The call session control function server is an S-CSCF (Serving-Call Session Control Function),
The application server is an SDP (Service Delivery Platform) server,
It is also preferable that the SDP server can increase or decrease the number of processor devices to be connected to the local network.

According to another embodiment of the service component relocation method of the present invention,
The application server is further connected to the Internet,
The service component also preferably executes the service by exchanging messages with other Web servers connected to the Internet.

According to the present invention, in a system in which a call session control function server and an application server are connected via an IP subsystem network,
The application server is composed of a plurality of processor devices connected via a local network, and the processor device can execute a plurality of service objects as service components,
The call session control function server
For each service request message, a filter condition setting means that sets in advance which processor device of the application server to transfer,
Service request transfer means for transferring the service request message to the first processor device of the application server based on the filter condition setting means when receiving the service request message from the terminal;
Service response receiving means for receiving a service response message including an execution time of the service component in the first processor device from the application server;
Relocation determination means for determining whether to relocate the service component of the first processor device to the second processor device based on the execution time for each service component in the first processor device;
Relocation request transmission means for transmitting a relocation request message to the first processor device of the application server when it is determined to relocate,
The processor device constituting the application server is:
A service request receiving means for receiving a service request message from the call session control function server;
A service execution unit that executes a plurality of service components corresponding to the service request message and causes the service component to measure an execution time;
A service response message return means for returning a service response message including an execution time for each service component to the call session control function server;
Relocation transfer means for transferring the service component to the second processor device via the local network when a relocation request message is received from the call session control function server is provided.

According to another embodiment of the system of the present invention,
The processor device of the application server further includes a protocol processing component that converts the received service request message into an object message as a part of the service component, and transfers the object message between the service components,
The call session control function server, as the protocol processing unit article, when it is repositioned to a second processor device, the service request message received from the terminal is transferred to the second processor unit of the application server, It is also preferable to further include a filter condition update means for updating the setting contents of the filter condition setting means .

According to another embodiment of the system of the present invention,
The processor device of the application server is
Service scenario selection means for selecting a service scenario corresponding to the service request message;
It is also preferable to have service scenario execution means for transferring the object message so that the specified service component is executed according to the execution procedure described in the service scenario.

According to another embodiment of the system of the present invention,
The IP subsystem network is an IMS / MMD network,
The call session control function server is an S-CSCF,
The application server is an SDP server,
It is also preferable that the SDP server can increase or decrease the number of processor devices to be connected to the local network.

According to another embodiment of the system of the present invention,
The application server is further connected to the Internet,
The service component also preferably executes the service by exchanging messages with other Web servers connected to the Internet.

  According to the method and system of the present invention, for an application server of an IMS network, service components to be executed on a hardware processor device are automatically relocated to other processor devices according to a load state. The maximum processing capacity can be increased or decreased, and the service function can be assigned to an efficient hardware processor device. Thereby, the operation cost in the application server can be reduced.

It is a system block diagram in a prior art. It is a system configuration diagram in the present invention. It is a basic sequence diagram in the present invention. It is a functional block diagram of the application server and S-CSCF in this invention. It is a specific sequence diagram in the present invention.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

  FIG. 2 is a system configuration diagram according to the present invention.

  According to FIG. 2, the application server 1 is constituted by a plurality of processor devices as compared to FIG. Each processor device is connected to a local network as a service bus. The local network may be a LAN (Local Area Network) or a network that physically connects a long distance. The application server 1 is also connected to the Internet 6 and can communicate with the Web server 7. Thereby, the application server 1 can also provide the function of the Web server in response to a service request from the terminal 5.

  Each processor device of the application server 1 can execute a componentized Web-based application service object (hereinafter referred to as “service component”) that can be used from the outside. According to the application server 1 of the present invention, the service components can be rearranged by transferring the service components between different hardware processor devices. As a result, the number of processor devices of the application server 1 can be optimally increased and decreased, and the service functions can be efficiently allocated to the processor devices.

  The S-CSCF 2 transfers the SIP service request message received from the terminal 5 to one processor device in the application server 1. The processor device provides a service based on the service request message using the function of the Web server 7 connected to the Internet 6.

  FIG. 3 is a basic sequence diagram in the present invention.

(S301) The terminal 5 transmits a service request message to the IMS network 4 via the access network. The service request message is received by the S-CSCF2.
(S302) The S-CSCF 2 confirms the filter condition (iFC) setting, and transfers the service request message to one of the processor devices of the application server. According to FIG. 3, it is transferred to the first processor device 11 of the application server 1.

(S303) The first processor device 11 selects a service scenario based on the service request message, and executes one or more service components according to the service component execution procedure described therein. Depending on the service component, the function of the Web server 7 connected to the Internet 6 is used. The first processor device 11 measures the execution time of each service component when executing the service component.

(S304) The first processor device 11 of the application server returns a SIP service response message including the execution result information and the execution time for each service component to the S-CSCF2.
(S305) The S-CSCF 2 acquires the execution time for each service component from the received service response message. Then, the service response message is returned to the terminal 5 via the IMS network 4 and the access network.

(S306) The S-CSCF 2 determines whether to relocate the service component of the first processor device 11 to the second processor device 12 based on the execution time for each service component. Here, if it takes a long time to execute a specific service component, it is determined that the service component should be relocated to another processor device. Service components include not only various software components such as presence function components, but also IMS protocol processing components. The IMS protocol processing component has a function of converting a SIP service request message into an object message for executing the service component.

  When the S-CSCF 2 determines to relocate, the S-CSCF 2 transmits a relocation request message to the first processor device 11 of the application server 1. The relocation request message includes the identifier of the service component to be relocated and the address of the processor device that is the relocation destination. Note that the IMS protocol processing component is also a relocation target in the same manner as a general service component.

  Further, when the IMS protocol processing component is rearranged from the first processor device 11 of the application server 1 to the second processor device 12, the S-CSCF 2 receives the service request message again from the terminal. The filter condition setting is updated so as to be transferred to the second processor unit 12.

(S307) The first processor device 11 of the application server 1 transfers the service component based on the received relocation request message to the second processor device 12 via the local network.

(S311) The S-CSCF 2 receives the service request message from the terminal 5.
(S312) The S-CSCF 2 confirms the filter condition (iFC) setting, and transfers the service request message to the second processor device 12 of the application server 1.
(S313) The second processor device 12 executes one or more service components according to the service component execution procedure.
(S314) The second processor device 12 of the application server returns a SIP service response message including the execution result information and the execution time for each service component to the S-CSCF2.
(S315) The S-CSCF 2 returns the received service response message to the terminal 5 via the IMS network 4 and the access network.

  FIG. 4 is a functional configuration diagram of the application server and the S-CSCF in the present invention.

  The S-CSCF 2 includes an IMS-side communication interface 20, a SIP processing unit 21, a service request transfer unit 22, a filter condition setting unit 23, a service response reception unit 24, a relocation determination unit 25, and a relocation request transmission. Unit 26 and filter condition update unit 27. These functional components excluding the communication interface are realized by executing a program that causes a computer installed in the S-CSCF to function.

  The IMS communication interface 20 is connected to the IMS network 4. The SIP processing unit 21 controls SIP messages exchanged with the IMS network 4 via the IMS communication interface 20.

  When the service request transfer unit 22 receives the service request message from the terminal 5, the service request transfer unit 22 sends the service request message to any of the processor devices of the application server 1 (11 or 11 according to FIG. 4) based on the filter condition setting unit 23. 12).

  The filter condition setting unit 23 sets in advance to which processor device of the application server each service request message.

  The service response receiving unit 24 receives a service response message including result information in the first processor device and an execution time for each service component from the application server 1. The execution time for each service component is output to the rearrangement determination unit 25. Then, the service response message is transferred to the terminal 5 via the IMS side communication interface 20.

  The relocation determination unit 25 determines whether or not to relocate the service component of the first processor device to the second processor device based on the execution time for each service component in the first processor device. When it is determined that the service component should be rearranged, the service component identifier to be rearranged and the address of the processor device that is the rearrangement destination are output to the rearrangement request transmission unit 26 and the filter condition update unit 27.

  When the rearrangement request transmission unit 26 determines to rearrange, the rearrangement request transmission unit 26 transmits a rearrangement request message to the processor device that is the rearrangement source for the application server.

  When the IMS protocol processing component is rearranged in the application server 1, the filter condition update unit 27 is configured to transfer the service request message to the rearranged processor device when the service request message is received again from the terminal. Update the filter condition settings.

  The processor device constituting the application server 1 includes an IMS side communication interface 110, an Internet side communication interface 111, an IMS protocol processing component 112, a plurality of service components 113, a service bus 114, a service scenario selection unit 115, A service execution unit 116, a Web protocol processing unit 117, and a rearrangement transfer unit 118 are included. These functional components excluding the communication interface are realized by executing a program that causes the processor device of the application server to function.

  The application server 1 is composed of a plurality of processor devices connected via a service bus (local network). In addition, the processor device can execute one or more service objects as service components. The service bus 114 is an interface between processor devices, and may be a local area network (LAN) or a network that physically connects a long distance. Through the service bus 114, service components and functions can access each other independently of the position of the processor device.

  The IMS communication interface 110 is connected to the IMS network 4. The Internet side communication interface 111 is connected to the Internet 6.

  The IMS protocol processing component 112 is one of the service components, and controls SIP messages exchanged with the IMS network 4 via the IMS communication interface 110. Here, the SIP service request message received from the IMS network 4 is converted into an object message. The converted object message is transferred to the service scenario selection unit 115 via the service bus 114.

  The IMS protocol processing component 112 is also a target to be rearranged between the processor devices together with the service component 113. The IMS protocol processing component 112 stores the address on the service bus of the service scenario selection unit 115 that is the transmission destination of the object message. Therefore, even if the IMS protocol processing component 112 and the service scenario selection unit 115 are arranged in different processor devices, the IMS protocol processing component 112 passes through the service bus to the service scenario selection unit 115 of another processor device. The object message can be sent.

  When the service scenario selection unit 115 receives the object message, the service scenario selection unit 115 selects a service scenario in which the execution procedure of one or more service components corresponding to the service request message is described. An object message including the selected service scenario is output to the service execution unit 116.

  The service execution unit 116 executes one or more service components based on the service scenario. At this time, the service execution unit 116 includes a service component execution procedure based on the service request message in the object message, and transfers the object message to the first service component. One or more service components based on the service scenario are executed by transferring the object message between the service components.

  The service execution unit 116 stores the address on the service bus of the service component 113 that is the transfer destination of the object message. Therefore, even if the service execution unit 116 and the service component 113 are arranged in different processor devices, the service execution unit 116 transmits the object message to the service component 113 of another processor device via the service bus. be able to.

  When the service component 113 receives the object message, the service component 113 executes the function. The execution time is included in the object message. The service component is a componentized Web-based application service object that can be used from the outside. Examples of service components include a presence function, a group function, a call control function, and a media control function. The service component executed last transfers the object message to the IMS protocol processing component 112 and is output to the S-CSCF 2 as a service response message.

  When the relocation transfer unit 118 receives the relocation request message from the S-CSCF 2, the relocation transfer unit 118 sends the designated service component 113 and / or IMS protocol processing component 112 to the second processor device via the service bus 114. Forward.

  FIG. 5 is a specific sequence diagram in the present invention.

(S501) The service request transfer unit 22 of the S-CSCF 2 receives a SIP request (service request message) from the terminal 5. In the SIP request, RequestURI corresponding to the service is specified. Then, the filter condition of the filter condition setting unit 23 is confirmed, and the SIP request is transmitted to the first processor device 11 of the application server 1. The filter condition setting unit 23 stores the address of the processor device of the application server 1 in association with the RequestURI.
<RrequestURI>-<address>
RrequestURI1-address of the processor unit 11
RrequestURI2-address of the processor unit 12

(S502) The IMS protocol processing component 112 of the first processor device 11 of the application server 1 receives the SIP request from the S-CSCF2. Then, the IMS protocol processing unit converts the SIP request into a SOAP (Simple Object Access Protocol) message. SOAP is XML (eXtensible
A protocol for calling a service object based on Markup Language (HTTP), HTTP (HyperText Transfer Protocol), or the like. According to SOAP, an object message having accompanying information called an envelope (envelope) attached to an XML document is exchanged using a protocol such as HTTP. The SOAP message is transferred to the service scenario selection unit 115 via the service bus 114. The SOAP message includes an address order for access as follows.
(1) IMS protocol processor address port
(2) Service scenario selection unit address port
RequestURI
(3) Address port of the service execution unit

(S503) Upon receiving the SOAP message, the service scenario selection unit 115 selects a service scenario corresponding to the RequestURI. The service scenario selection unit 115 stores a service scenario corresponding to RequestURI.
<RequestURI>-<Service scenario>
RequestURI1-Scenario 1
The selected scenario is included in the SOAP message as follows.
(1) IMS protocol processor address port
(2) Service scenario selection unit address port
RequestURI
(3) Address port of the service execution unit
Service scenario (Scenario 1)
Then, the SOAP message is transferred to the service execution unit 116.

(S504) Upon receiving the SOAP message, the service execution unit 116 reads the service scenario (scenario 1). The service scenario describes the execution order of service components to be executed in response to a service request.
<Service scenario>-<object A><objectB><objectC>
Scenario 1-Service Component A, Service Component B, Service Component C
Then, the service execution unit 116 transfers the SOAP message to the first service component described in the service scenario.
(1) IMS protocol processor address port
(2) Service scenario selection unit address port
RequestURI
(3) Address port of the service execution unit
Service scenario (Scenario 1)
(4) Address port of service component A (5) Address port of service component B (6) Address port of service component C (7) Address port of IMS protocol processing unit

(S505) The service component A receives the SOAP message and executes the function. At this time, the “process start time” and “process end time” of the time stamp are acquired as the execution time. The service component can also execute the service by exchanging messages with other Web servers connected to the Internet. Then, the result information and the execution time are added to the SOAP message, and the service component A transfers the SOAP message to the service component B to be executed next.
(S506) Similarly, the service component B also executes the function and transfers the SOAP message in which the result information and the execution time are added to the service component C to be executed next.
(S507) Further, similarly, the service component C executes the function, and finally transfers the SOAP message in which the result information and the execution time are added to the IMS protocol processing component 112.

(S508) The IMS protocol processing component 112 converts the SOAP message into a SIP service response message. The service response message is transmitted to the S-CSCF 2 via the IMS network 4.

(S509) The service response receiver 24 of the S-CSCF2 receives the service response message. The execution time (“processing start time” and “processing end time”) included in the service response message is output to the rearrangement determination unit 25.

(S510) The relocation determination unit 25 determines the relocation of the service component based on the “processing start time” and “processing end time” for each service component. The following information is obtained by the “processing start time” and “processing end time” for each service component.
Execution time for each service component = processing start time-processing end time Communication time between service components = processing end time-processing start time Service provision time = Σ (execution time + communication time)

  Here, when the load state is determined and rearranged according to the execution time for each service component, the number of message transfers between servers increases, and the communication time between service components may increase. For this purpose, the rearrangement of the service components is determined in consideration of not only the execution time for each service component but also the communication time between the service components based on the execution order of the service components in the scenario.

  Various existing techniques can be used as the determination method. For example, it is monitored for each service component that its execution time is equal to or less than a first predetermined threshold. A service component whose execution time exceeds the first predetermined threshold is requested to be relocated to another processor device with a light load state. Thereafter, when the communication time between the service components exceeds the second predetermined threshold, another service component executed adjacent to the rearranged service component is transferred to the processor device of the previously rearranged service component. Request relocation.

(S511) When the IMS protocol processing component is relocated to the second processor device of the application server 1 in accordance with the relocation request instruction from the relocation determination unit 25, the filter condition update unit 27 sends the service request message to the terminal The filter condition setting is updated so that it is transferred to the relocation destination processor device when it is received again.

(S512) The rearrangement request transmission unit 26 transmits a rearrangement request message to the first processor device 11 of the application server 1 in accordance with the rearrangement request instruction from the rearrangement determination unit 25. The relocation request message includes the identifier of the service component to be relocated and the address of the processor device that is the relocation destination.

(S513) The IMS protocol processing component 112 transfers the received relocation request message to the relocation transfer unit 118.
(S514) The relocation transfer unit 118 transfers the service component (and IMS protocol processing component) based on the relocation request message to the second processor device 12 via the service bus.

  As described above in detail, according to the method and system of the present invention, for the application server of the IMS network, the service component to be executed by the hardware processor device is changed according to the load state. By automatically rearranging, the maximum processing capacity can be increased and decreased, and the service function can be assigned to an efficient hardware processor device. Thereby, the operation cost in the application server can be reduced.

  Various changes, modifications, and omissions of the above-described various embodiments of the present invention can be easily made by those skilled in the art. The above description is merely an example, and is not intended to be restrictive. The invention is limited only as defined in the following claims and the equivalents thereto.

DESCRIPTION OF SYMBOLS 1 Application server 11 1st processor apparatus 12 2nd processor apparatus 110 IMS side communication interface 111 Internet side communication interface 112 IMS protocol process component 113 Service component 114 Service bus 115 Service scenario selection part 116 Service execution part 117 Web protocol process part 118 Relocation Transfer Unit 2 S-CSCF
DESCRIPTION OF SYMBOLS 20 IMS side communication interface 21 SIP processing part 22 Service request transfer part 23 Filter condition setting part 24 Service response receiving part 25 Relocation determination part 26 Relocation request transmission part 27 Filter condition update part 3 P-CSCF
4 IMS network 5 Terminal 6 Internet 7 Web server

Claims (10)

In a service component relocation method in a system in which a call session control function server and an application server are connected via an IP subsystem network,
The application server is configured by a plurality of processor devices connected via a local network, and the processor device can execute a plurality of service objects as service components,
When the call session control function server receives a service request message from a terminal, a first step of transferring the service request message to a first processor device of the application server based on a preset filter condition When,
A second step in which a first processor device of the application server executes a plurality of service components corresponding to the service request message and measures an execution time for each service component;
A third step in which the first processor device of the application server returns a service response message including an execution time for each service component to the call session control function server;
The call session control function server determines whether to relocate the service component of the first processor device to the second processor device based on the execution time for each service component;
When the call session control function server determines to relocate, a fifth step of transmitting a relocation request message to the first processor device of the application server;
The first processor device of the application server has a sixth step of transferring a service component based on the relocation request message to the second processor device via the local network. Relocation method. Regarding the second step, the first processor device of the application server converts a received service request message into an object message as a part of the service component, and a protocol processing component that transfers the object message between the service components. In addition,
For the sixth step, when the protocol processing component of the first processor device is relocated to the second processor device, the call session control function server receives the service request message received from the terminal The service component relocation method according to claim 1, wherein the filter condition is updated so as to be transferred to a second processor device of the application server. For the second step, the first processor device of the application server
Selecting a service scenario corresponding to the service request message;
3. The service component rearrangement method according to claim 2, wherein the object message is transferred so that a specified service component is executed according to an execution procedure described in the service scenario. The IP subsystem network is an IMS (IP Multimedia Subsystem) / MMD (MultiMedia Domain) core network,
The call session control function server is an S-CSCF (Serving-Call Session Control Function),
The application server is an SDP (Service Delivery Platform) server,
The service component rearrangement method according to claim 1, wherein the SDP server can increase or decrease the number of processor devices to be connected to the local network. The application server is further connected to the Internet;
5. The service component according to claim 1, wherein the service component executes a service by exchanging a message with another Web server connected to the Internet. 6. Relocation method. In a system in which a call session control function server and an application server are connected via an IP subsystem network,
The application server is composed of a plurality of processor devices connected via a local network, and the processor device can execute a plurality of service objects as service components,
The call session control function server includes:
For each service request message, a filter condition setting means that presets which processor device of the application server to transfer,
Service request transfer means for transferring the service request message to the first processor device of the application server based on the filter condition setting means when receiving a service request message from the terminal;
Service response receiving means for receiving a service response message including an execution time of a service component in the first processor device from the application server;
Relocation determination means for determining whether to relocate the service component of the first processor device to the second processor device based on the execution time of each service component in the first processor device;
Relocation request transmission means for transmitting a relocation request message to the first processor device of the application server when it is determined to relocate,
The processor device constituting the application server is:
Service request receiving means for receiving the service request message from the call session control function server;
A service execution means for executing a plurality of service components corresponding to the service request message and causing the service component to measure an execution time;
Service response message return means for returning a service response message including an execution time for each service component to the call session control function server;
Relocation transfer means for transferring the service component to the second processor device via the local network when the relocation request message is received from the call session control function server. . The processor device of the application server further includes a protocol processing component that converts the received service request message into an object message as a part of the service component, and transfers the object message between the service components,
The call session control function server forwards the protocol processing unit article, when it is repositioned to a second processor device, the service request message received from the terminal, to the second processor unit of the application server The system according to claim 6, further comprising filter condition updating means for updating setting contents of the filter condition setting means . The processor device of the application server is:
Service scenario selection means for selecting a service scenario corresponding to the service request message;
8. The system according to claim 7, further comprising service scenario execution means for transferring the object message so that a specified service component is executed according to an execution procedure described in the service scenario. The IP subsystem network is an IMS / MMD network;
The call session control function server is an S-CSCF;
The application server is an SDP server;
The system according to any one of claims 6 to 8, wherein the SDP server can increase or decrease the number of processor devices to be connected to the local network. The application server is further connected to the Internet;
The system according to any one of claims 6 to 9, wherein the service component executes a service by exchanging a message with another Web server connected to the Internet.

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