CN101771932B - Multimedia subsystem local service triggering system and method and relevant device - Google Patents

Abstract

The invention discloses a local service triggering system, method and related device of a multimedia subsystem, which are used to solve the problem that a user terminal cannot use a large number of location-related services provided by a local network without ordering. The system includes an application server, a proxy call session control function device and a first service trigger function device, the application server, the proxy call session control function device and the first service trigger function device are located in the same network, wherein: the proxy call session control function The device receives a local service request message for requesting a location-related service sent by a user equipment located in its own network, and sends the message to a first service trigger function device; the first service trigger function device is configured to, according to the received The local service identifier included in the message, select an application server capable of providing the service corresponding to the identifier, and route the message to the selected application server.

Description

Multimedia Subsystem Local Service Triggering System, Method and Related Devices

technical field

The present invention relates to the field of communication technology, in particular to a local service triggering system, method and related device of an IP multimedia subsystem.

Background technique

IP Multimedia Subsystem (IMS, IP Multimedia Subsystem) can meet people's various communication service needs including instant messaging, collaborative work, streaming media and other services.

According to the definition of 3GPP, communication services can be divided into two categories: location-dependent service (LDS, Location Dependent Service) and location-independent service (LIS, Location Independent Service). Location-related services are services that the network operator or other service providers relying on the operator's network provide to the user based on the current network information of the user when the user enters an area covered by a certain network, without the user's prior subscription. The location-independent service is a service that network operators or other service providers relying on the operator's network can provide to users in all areas covered by the network.

The local service is a communication service provided to the user by the network where the user is currently located (that is, the local network), and may be a location-related service or a location-independent service. Local service triggering is to find an application server that can provide the local service corresponding to the local service identifier requested by the user included in the message for the user equipment sending the local service request message, and send the message to the application server.

The triggering principle of the existing IMS local service conforming to the 3GPP standard is that no matter whether the user terminal is in the roaming state or not, and whether the local service requested by the user is a location-related service or a location-independent service, the user needs to subscribe to the service in advance. All services adopt the home service control method, that is, all local services are triggered by the Serving-Call Session Control Function (S-CSCF, Serving-Call Session Control Function) in the home network of the user equipment. Please refer to the attached figure for the specific process 1,

Steps 1 to 6 are the registration process of the local service, and steps 7 to 11 are the triggering process of the local service;

Step 1, the user sends a registration request message through the user equipment;

Step 2, the proxy call session function device P-CSCF in the network where the user is located sends the received registration request message sent by the user equipment in step 1 to the service call session control function device of the home network to which the user equipment belongs;

Step 3, the home network service call session control function device sends a service assignment request (SAR, Server-Assignment-Request) to the home subscriber server (HSS, Home Subscriber Server) according to the received local service request sent by the user equipment, and the The service allocation request includes the user ID and the local service ID requested by the user;

Step 4, the home user server searches for the corresponding initial filter rule (iFC, Initial FilterCriteria) according to the user identification contained in the received service distribution request and the local service identification requested by the user, and includes the service of the found iFC The assignment response (SAA, Sever-Assignment-Answer) is returned to the home network service call session control function device, and the iFC is created for the user by the operator through the BOSS system;

Step 5, the home network service call session control function device obtains the iFC from the received SAA, and stores it;

In step 6, the home network service call session control function device returns registration success response information to the user equipment.

When subsequent users need to use local services, the network needs to trigger processing of the local services, and the specific process is as follows:

Step 7, the user sends a local service request message through the user equipment, and the local service request message includes the user identifier and the local service identifier requested by the user;

Step 8, the proxy call session function device P-CSCF in the network where the user is located sends the received local service request message sent by the user equipment in step 7 to the service call session control function device of the home network to which the user equipment belongs;

Step 9: The service call session control function device of the home network to which the user equipment belongs determines to provide the local service requested by the user according to the user identification in the received local service request message, the local service identification requested by the user, and the iFC obtained during registration Identify the application server AS of the corresponding local service;

Step 10, the service call session control function device of the home network to which the user equipment belongs routes the local service request message to the application server determined in step 9;

After receiving the local service request message sent by the service call session control function device of the home network to which the user equipment belongs in step 10, the application server provides the user equipment with the local service requested by the user.

In the above-mentioned local service triggering process based on home service control, when a user uses a local service of a different network (including a home network or a visited network), the home network service must call the session control function device to trigger the AS corresponding to the local service, However, if the user has not subscribed to the service in advance, the home network service call session control function device and the home user server do not have the local service identifier requested by the user, or the routing information of the application server that can complete the local service, etc. to trigger the For other information required by the local service, the operator needs to create or modify the iFC corresponding to the service and the routing information of the application server. In many cases, a large number of location-related services provided by the network, such as services that provide public copy information, discount information in shopping malls, and information on nearby restaurants within the coverage area of the network, do not require users to subscribe. Use of subscribed services without access to the vast abundance of LDS provided by the network.

Contents of the invention

Embodiments of the present invention provide a system and method for triggering local services of an IP multimedia subsystem, which are used to solve the problem that the user terminal cannot use a large number of subscription-free services provided by the local network due to the use of the IMS system local service trigger mode based on home service control in the prior art. The problem with location-related businesses.

The technical scheme that the embodiment of the present invention provides is as follows:

A local service triggering system of an IP multimedia subsystem, comprising an application server, a proxy call session control function device and a first service trigger function device, and the application server, the proxy call session control function device and the first service trigger function device are located in the same network in, where:

An application server, configured to provide application services;

The proxy call session control function device is configured to receive a local service request message for requesting a location-related service sent by a user equipment located in its own network, and send the message to the first service trigger function device, wherein the message contains the local service identifier requested by the user;

The first service trigger function means is configured to select an application server capable of providing the service corresponding to the identifier according to the local service identifier included in the received message, and route the message to the selected application server.

A proxy call session control function device, comprising:

a receiving unit, configured to receive a local service request message for requesting a location-related service;

The sending unit is configured to forward the message received by the receiving unit to the service trigger function device in its own network.

A service trigger function device, including a location call session control function unit and a service discovery and selection unit, wherein:

The location call session control function unit is used to receive the local service request message for requesting location related services sent by the proxy call session control function device in the network where it is located, and send the message to the service discovery and selection unit, and receiving the routing information of the application server sent by the service discovery and selection unit, and routing the message to the corresponding application server according to the routing information;

The service discovery and selection unit is configured to select an application server capable of providing the service corresponding to the identification according to the local service identification contained in the received message, and send the routing information of the selected application server to the location call session Control functional unit.

A method for triggering local services of an IP multimedia subsystem, comprising:

The proxy call session control function device receives a local service request message for requesting a location-related service sent by a user equipment located in its own network, and forwards the received message to the first service trigger in the same network as itself. A functional device, wherein the message includes a local service identifier requested by the user;

The first service trigger function device receives the message sent by the proxy call session control function device, and selects the application that can provide the service corresponding to the identification according to the local service identification requested by the user contained in the message server, and

The message is routed to the selected application server.

In the embodiment of the present invention, by adding a service trigger function device in the network, the local service request message sent by the user equipment to request the location-independent service is sent to the application server that can complete the corresponding local service in the local service request message, avoiding In the local service trigger mode based on home service control, the home network service call session control function device and the home user server do not include the local service identifier of the location-independent service that does not need to be subscribed, and the routing information of the application server that completes the local service As well as other information required to trigger the local service, the user terminal cannot use a large number of subscription-free location-related services provided by the local network.

Description of drawings

FIG. 1 is a flow chart of the principle of IMS local service triggering in the prior art;

Fig. 2 is a principle flow chart of the IMS local service trigger scheme proposed by the embodiment of the present invention;

FIG. 3 is a schematic structural diagram of a proxy call session control function device proposed by an embodiment of the present invention;

FIG. 4 is a schematic structural diagram of a service trigger function device proposed by an embodiment of the present invention;

FIG. 5 is a schematic structural diagram of a first location call session control functional unit proposed by an embodiment of the present invention;

FIG. 6 is a schematic structural diagram of a second location call session control functional unit proposed by an embodiment of the present invention;

FIG. 7 is a schematic structural diagram of a third location call session control functional unit proposed by an embodiment of the present invention;

FIG. 8 is a schematic structural diagram of a service discovery and selection unit proposed by an embodiment of the present invention;

FIG. 9 is a schematic structural diagram of the selection subunit in the service discovery and selection unit proposed by the embodiment of the present invention.

Detailed ways

For the existing IMS local service triggering method based on home service control, because the home network service call session control function device and the home user server do not contain local service identifiers of a large number of location-related services that do not need to be subscribed in the local network, completing the local The routing information of the application server of the service and other information required to trigger the local service cause the problem that the user terminal cannot use the local network to provide a large number of location-related services that do not need to be subscribed. A service trigger function device is added, which can The local service request sent by the user equipment located in the network where the device is located is sent to the application server that can complete the local service corresponding to the local service request, avoiding the above-mentioned disadvantages of using the IMS local service trigger method based on home service control, and providing Feasible IMS local service trigger scheme.

The main realization principles, specific implementation modes and corresponding beneficial effects that can be achieved of the technical solutions of the embodiments of the present invention will be described in detail below in conjunction with each accompanying drawing.

Please refer to accompanying drawing 2, the main realization principle flow of the technical solution of the embodiment of the present invention is as follows:

Step 1, the user sends a local service request message through the user terminal, and the local service request message includes the user identification, the local service identification requested by the user and the identification bit of the service type to which the local service requested by the user belongs, the equipment status of the user terminal and the user Other information such as the location of the device;

Step 2: The proxy-CSCC function device receives the local service request message sent by the user equipment within the coverage of the network where it is located, and according to the service type used to identify the local service requested by the user contained in the local service request message, The identification bit judges that the local service requested by the user is a location-related service or a location-independent service. If it is a location-independent service, the local service request message is forwarded to the home network call session control function device to which the user equipment belongs, and the subsequent local service triggers The process is similar to the prior art, and will not be described in detail here; if it is a location-related service, go to step 30;

Step 3, the proxy call session control function device sends the local service request message requesting the location-related service received in step 2 to the first service trigger function device in the network where it is located;

Step 4, the location call session control function unit in the first service trigger function device sends the local service request message sent by the agent call session control function device in step 3 to the service discovery and selection in the first service trigger function device Unit, combined with the subsequent steps in Figure 2, can achieve the purpose of triggering the local service requested by the user through the user equipment for the user equipment, in order to avoid providing the local service requested by the user equipment for the user equipment that is not within the coverage area of the user equipment The possible waste of network bandwidth resources may be caused. Here, the location information of the user equipment can be determined according to the message. When the location information is within the coverage of the network where the first service trigger function device is located, the above-mentioned sending of the message is performed. For the processing of the service discovery and selection unit, when the location information is not within the coverage of the network where it is located, the message is discarded.

The process of determining the location information of the user equipment according to the message is as follows: when the message contains the current location information of the user equipment, obtain the location information from the information; if the message does not include the user equipment When the current location information is present, according to the user identification contained in the message, send a request message for requesting the location information of the user equipment corresponding to the user identification to a location acquisition function device (LRF, Location Retrieval Function), and from The current location information of the user equipment is obtained from the feedback information of the location acquisition function device.

Step 5, the service discovery and selection unit selects an application server that can provide the local service corresponding to the identifier from the pre-stored application server list according to the local service identifier requested by the user in the received local service request message;

The pre-stored application server list in the service discovery and selection unit includes the local service identifiers that the application server can provide and the routing information of the application server, and the service discovery and selection unit obtains the local service requested by the user from the received local service request message. The service identifier is to query the application server in the application server list whose local service identifier that the application server can provide is consistent with the local service identifier requested by the user.

The service discovery and selection unit may also select the local service identifier corresponding to the identifier according to the local service identifier requested by the user in the message, combined with other information contained in the message, such as the current location information of the user equipment, etc. The application server of the service, for example, the local service corresponding to the local service identifier requested by the user in the message is to provide the user with information on nearby gas stations and restaurants, and the first service discovery and selection device bases on the local service identifier requested by the user and the The current location information of the user equipment contained in the above message is used to determine an application server that can provide the user with information about gas stations and restaurants near the current location of the user equipment.

Step 6, the service discovery and selection unit sends the routing information of the application server selected in step 5 to the location call session control function unit, and the service discovery and selection unit searches the pre-stored application server list in step 5, but no one can find any When the provided local service identifier is consistent with the local service identifier requested by the user in the local service request message, the routing information of the application server may not be sent to the location call session control function unit, or the routing information of the application server may be sent to the location call session control function unit. A routing information with empty content;

Step 7a, the location call session control function unit receives the routing information sent by the service discovery and selection unit according to the local service request message, and routes the local service request message to the corresponding routing information according to the routing information application server;

Step 7b: The location call session control function unit does not receive the routing information sent by the service discovery and selection unit according to the local service request message within a predetermined time, or cannot obtain useful routing information from it because the received routing information is empty information. Send the local service request message to the second service trigger function device located in the network adjacent to the network where the first service trigger function device is located. After receiving the local service request message sent by the first service trigger function device, the location call session control function device in the second service trigger function device sends the local service request message to the service in the second service trigger function device The discovery and selection unit receives the routing information of the application server sent by the service discovery and selection unit according to the message, and routes the message to the corresponding application server according to the routing information. The processing flow of the location call session control function unit in the second service trigger function device after receiving the local service request message sent by the first service trigger function device is the same as receiving the proxy call session control in the network where the second service trigger function device is located. The processing flow after the local service request message sent by the functional device is similar.

Step 8: After receiving the local service request message sent in step 7a, the application server establishes a connection between the user equipment corresponding to the user ID according to the user ID included in the message and the local service ID requested by the user. The session connection provides the requested local service for the user equipment.

Wherein, in step 5 of the above-mentioned principle flow, the service discovery and selection unit may obtain the list of application servers in advance through the following two schemes:

In the first solution, the service discovery and selection unit collects the service information reported by the application server forwarded by the location call session control function unit, the service information includes the local service identifier that the application server can provide, and the routing information of the application server, Obtain predetermined information such as the local service identifier and routing information of the application server that can be provided by the application server from the service information, and store the obtained information in the application server list in a predetermined format;

In the second solution, the service discovery and selection unit broadcasts a service request message to the network at a predetermined period through the location call session control function unit; the application server receiving the service request message sends a location call session control message to the first service trigger function device. The functional unit feeds back a response message corresponding to the service request message, the response message includes the local service identifier that the application server can provide, and the routing information of the application server; the location call session control function unit will receive the response message Send it to the service discovery and selection unit; the service discovery and selection unit obtains predetermined information such as the local service identifier that the application server can provide and the routing information of the application server from the response message, and stores the obtained information into a predetermined format in the list of application servers.

The functions of the service discovery and selection unit and the location call session control function unit in the service trigger function device proposed by the embodiment of the present invention can be implemented in two functional entities respectively, or can be implemented in the same functional entity.

The technical solution proposed by the embodiment of the present invention adds a service trigger function device in the network, which can send the local service request for requesting the location-independent service sent by the user equipment in the network where it is located to the corresponding service provider that can provide the local service request. The application server of the local business, so as to realize the triggering process of the local business. The IMS local service trigger solution provided by the above-mentioned embodiments of the present invention enables users to conveniently use the rich location-related services provided by the local network without subscription, and does not need to change the existing network service call session control function device S-CSCF Structure or increase the load of the existing network service call session control function device, so it is relatively easy to implement.

Correspondingly, please refer to FIG. 3 , the embodiment of the present invention also provides a proxy call session control function device, including a receiving unit 310 and a sending unit 320, wherein,

The receiving unit 310 is configured to receive a local service request message for requesting a location-related service sent by a user equipment located in its own network;

The sending unit 320 is configured to forward the message received by the receiving unit 310 to the location call session control function device in its own network.

The embodiment of the present invention also provides a service trigger function device, please refer to FIG. 4 , which includes a location call session control function unit 410 and a service discovery and selection unit 420, wherein:

The location call session control function unit 410 is configured to receive a local service request message for requesting a location-related service sent by a proxy call session control function device in its own network, and send the message to the service discovery and selection unit, and receiving the routing information of the application server sent by the service discovery and selection unit 420, and routing the message to the corresponding application server according to the routing information;

The service discovery and selection unit 420 is configured to select an application server that can provide the service corresponding to the identification according to the local service identification contained in the received message, and send the routing information of the selected application server to the location caller session control function unit 410 .

Please refer to accompanying drawing 5, above-mentioned location call session control function unit comprises the first receiving subunit 510, the first sending subunit 520, the second receiving subunit 530 and the routing subunit 540, wherein,

The first receiving subunit 510 is configured to receive a local service request message for requesting a location-related service, and the local service request message is issued by a proxy call session control function device in the same network as the device or located in the same network as the device Sent by a device with a service trigger function in a network adjacent to the network where the device is located;

The first sending subunit 520 is configured to send the message received by the first receiving subunit 510 to the service discovery and selection unit;

The second receiving subunit 530 is configured to receive the routing information of the application server sent by the service discovery and selection unit, wherein the routing information is the message sent by the service discovery and selection unit according to the first sending subunit 520 , the routing information of the selected application server capable of implementing the service corresponding to the local service identifier requested by the user in the message;

The routing subunit 540 is configured to route the message received by the first receiving unit 510 to the application server corresponding to the routing information according to the routing information received by the second receiving subunit 530 .

Please refer to accompanying drawing 6, in the location call session control function unit as shown in accompanying drawing 5, also comprise the second sending subunit 610, for the second receiving subunit 620 does not receive the service discovery within the predetermined time When the routing information of the application server sent by the device according to the message is selected or the received routing information is invalid routing information, the message received by the first receiving subunit 630 is forwarded to the A location call session control function device in an adjacent network.

Please refer to accompanying drawing 7, in the location call session control functional unit shown in accompanying drawing 5, also comprise judging subunit 710, be used for after the first receiving subunit 720 receives described message, determine to generate described message The current location information of the user equipment, and when the location information is within the network coverage of the apparatus, trigger the first sending unit 730 to send the message to the service discovery and selection apparatus.

Please refer to accompanying drawing 8, the service discovery and selection unit in the service trigger function device in accompanying drawing 4 comprises receiving subunit 810, selecting subunit 820 and sending subunit 830, wherein

The receiving subunit 810 is configured to receive a local service request message for requesting location-related services sent by the location call session control function unit;

The selecting subunit 820 is configured to, according to the local service identifier requested by the user included in the message received by the receiving subunit 810, select an application server capable of implementing the service corresponding to the identifier;

The sending subunit 830 is configured to send the routing information of the application server selected by the selecting subunit 820 to the location call session control function unit.

Please refer to Figure 9, in the service discovery and selection unit shown in Figure 8, the selection subunit specifically includes an acquisition module 910 and a search module 920, wherein,

An obtaining module 910, configured to obtain the local service identifier requested by the user from the local service request message received by the receiving subunit;

The search module 920 is configured to search for an application server that can provide a local service identifier that is consistent with the identifier obtained by the acquisition module 910 in the pre-stored application server list, wherein the application server list includes the application server that can provide The local service identifier and the routing information of the application server.

Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalent technologies, the present invention also intends to include these modifications and variations.

Claims (10)

1. A kind of IP multimedia subsystem local service triggering system, it is characterized in that, comprise application server, proxy call session control function device, first service trigger function device and the second service trigger function device, described application server, proxy call session The control function device and the first service trigger function device are located in the same network, and the second service trigger function device is located in a network adjacent to the network where the first service trigger function device is located, wherein: An application server, configured to provide application services; The proxy call session control function device is configured to receive a local service request message for requesting a location-related service sent by a user equipment located in its own network, and send the message to the first service trigger function device, wherein the message contains the local service identifier requested by the user; The first service trigger function device is configured to select an application server that can provide the service corresponding to the identifier according to the local service identifier contained in the received message, and route the message to the selected application server; The second service triggering function device is configured to receive the message sent by the first service triggering function device when no application server is selected, and select the corresponding service provider that can provide the identification according to the local service identification contained in the message. the application server of the business, and route the message to the selected application server. 2. A service trigger function device, characterized in that it includes a location call session control function unit and a service discovery and selection unit, wherein: The location call session control function unit is used to receive the local service request message for requesting location related services sent by the proxy call session control function device in the network where it is located, and send the message to the service discovery and selection unit, and receiving the routing information of the application server sent by the service discovery and selection unit, and routing the message to the corresponding application server according to the routing information, and not receiving the message sent by the service discovery and selection unit within a predetermined time When routing information of the application server of the application server, the received message is forwarded to the service trigger function device located in the adjacent network; The service discovery and selection unit is configured to select an application server capable of providing the service corresponding to the identification according to the local service identification contained in the received message, and send the routing information of the selected application server to the location call session Control functional unit. 3. The device according to claim 2, wherein the location call session control function unit specifically comprises: A first receiving subunit, configured to receive a local service request message for requesting a location-related service; The first sending subunit is configured to send the message received by the first receiving subunit to the service discovery and selection unit; The second receiving subunit is configured to receive the routing information of the application server sent by the service discovery and selection unit according to the message; The routing subunit is configured to route the message received by the first receiving unit to the application server corresponding to the routing information according to the routing information received by the second receiving subunit. 4. The device according to claim 3, wherein the location call session control function unit further comprises: The second sending subunit is configured to send the routing information of the application server received by the first receiving subunit when the second receiving subunit does not receive the routing information of the application server sent by the service discovery and selection unit according to the message within a predetermined time The message is forwarded to a service trigger function device located in a network adjacent to the network where the device is located. 5. The device according to claim 3, wherein the location call session control function unit further comprises: A judging subunit, configured to, after the first receiving subunit receives the message, determine the current location information of the user equipment that generated the message, and when the location information is within the coverage of the network where the device is located , triggering the first sending subunit to send the message to the service discovery and selection unit. 6. The device according to claim 2, wherein the service discovery and selection unit specifically comprises: The receiving subunit is used to receive a local service request message for requesting a location-related service sent by the location call session control function unit; The selection subunit is configured to select an application server capable of providing the service corresponding to the identifier according to the local service identifier requested by the user included in the message received by the receiving subunit; The sending subunit is configured to send the route information of the application server selected by the selection subunit to the location call session control function unit. 7. The device according to claim 6, wherein the selection subunit specifically comprises: An acquisition module, configured to acquire the local service identifier requested by the user from the message received by the receiving subunit; A search module, configured to search for an application server that can provide a local service identifier that is consistent with the identifier obtained by the acquisition module in a pre-stored application server list, wherein the application server list includes the local service that the application server can provide ID and routing information of the application server. 8. A method for triggering local services of an IP multimedia subsystem, characterized in that, comprising: The proxy call session control function device receives a local service request message for requesting a location-related service sent by a user equipment located in its own network, and forwards the received message to the first service trigger in the same network as itself. A functional device, wherein the message includes a local service identifier requested by the user; The first service trigger function device receives the message sent by the proxy call session control function device, and selects the application that can provide the service corresponding to the identification according to the local service identification requested by the user contained in the message a server that routes the message to the selected application server; and The second service trigger function device located in the network adjacent to the network where the first service trigger function device is located receives the message sent by the first service trigger function device when no application server is selected, and according to the information contained in the message the local service identifier, select an application server capable of providing the service corresponding to the identifier, and route the message to the selected application server. 9. The method according to claim 8, wherein the first service trigger function device selects an application server that can provide the service corresponding to the identifier according to the local service identifier requested by the user contained in the message, specifically include: The first service trigger function means determines the current location information of the user equipment that generates the message according to the received message, and When it is determined that the location information is within the network coverage of the device, an application server capable of providing the service corresponding to the identifier is selected. 10. The method according to claim 9, wherein the first service trigger function device determines the current location information of the user equipment that generated the message according to the received message, specifically comprising: judging whether the message contains the current location information of the user equipment, and When the message includes the current location information of the user equipment, acquire the location information, and When the message does not contain the current location information of the user equipment, the current location information of the user equipment is obtained from the location acquisition function device according to the user identifier contained in the message.

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