WO2012058943A1

WO2012058943A1 - Ip multimedia subsystem, and method and device for forking subscription

Info

Publication number: WO2012058943A1
Application number: PCT/CN2011/077289
Authority: WO
Inventors: 高扬; 周蓝粢
Original assignee: 中兴通讯股份有限公司
Priority date: 2010-11-05
Filing date: 2011-07-18
Publication date: 2012-05-10
Also published as: CN102469070B; CN102469070A

Abstract

A method for Forking subscription in an IP multimedia subsystem is disclosed. The method comprises: after receiving a subscription request sent by a subscriber, the IMS determining all ASs capable of processing the subscription request according to service information carried in the subscription request, and sending the subscription request to all the ASs. A device for Forking subscription in an IMS for implementing the above method is also disclosed, comprising: a receiving unit, configured to receive a subscription request from a subscriber; a determination unit, configured to determine all ASs capable of processing the subscription request according to service description information carried in the subscription request; and a sending unit, configured to send the subscription request to all the ASs. An IMS is also disclosed. The present invention can achieve subscription Forking of services with minor changes to an existing system and have desirable compatibility.

Description

IP multimedia subsystem, method and device for subscribing toking

The invention relates to a subscription Forking technology in an IP Multimedia Subsystem (IMS) network architecture, in particular to an IP multimedia subsystem, a method and device for subscribing to Forking. Background technique

IMS is the future of multimedia communications and the most important component of next-generation networks. It is a subsystem supporting IP multimedia services proposed by the 3GPP (3GPP, Third Generation Partnership Project). Its distinctive feature is the use of the Session Initial Protocol (SIP) system, communication and access methods. Irrelevant, it can have multiple multimedia service control functions and bearer separation, call and session separation, application and service separation, service and network separation, and mobile network and Internet service integration.

In the IMS network, a public user identity (PUI, Public User Identity) and a private user identity (PVI, Private User Identity) are combined to form a registration. A PUI can be registered with multiple PVIs multiple times, that is, one number can have Multiple contact addresses, corresponding to multiple actual terminals. A session request can look for multiple destination addresses, that is, the behavior of multiple terminals is called Forking. That is, a SIP message is allowed to be received by multiple user terminals of a associated user identity. The Proxy Server, such as the Call Session Control Function (CSCF), forwards the INVITE to multiple locations after the new session request arrives.

With the continuous development of IMS, the services in the telecommunication network are also constantly growing, and the demand for business subscriptions is constantly expanding. Currently, the process of service subscription in an IMS network is as follows: When a user needs a certain service, the user sends a request for subscribing to the service to the IMS, where The IMS can be a Serving Call Session Control Function (S-CSCF), but is not limited to this device. The S-CSCF is used as an example to describe the service subscription process. After receiving the subscription request, the S-CSCF sends the subscription request to the corresponding application server (AS, Application Server), and the AS responds to the subscription request, completes the subscription operation of the service, and returns the service subscription operation result to the S-CSCF, S- The CSCF forwards the result of this service subscription operation to the user. The subscription request received by the S-CSCF must be an event packet that the S-CSCF can support, and the S-CSCF has previously configured which event packet is sent to which AS to process.

However, based on the prior art described above, it is found that in the actual business subscription process, the following problems arise:

First, the S-CSCF sends the event packet of the subscription request sent by the user to the corresponding AS in a pre-fixed configuration, but there is likely to be an event packet that receives the subscription request forwarded by the S-CSCF, and the AS does not support the subscription of the user. Business situation;

Second, when different ASs support the same kind of service, the S-CSCF does not support Forking for subscription requests. Summary of the invention

In view of this, the main object of the present invention is to provide an IP multimedia subsystem, a method and device for subscribing to Forking, and an IMS can implement a subscription for a service.

In order to achieve the above object, the technical solution of the present invention is achieved as follows:

A method for subscribing to Forking in an IP multimedia subsystem, including:

After receiving the subscription request sent by the user, the IMS determines, according to the service information carried in the subscription request, all ASs that can process the subscription request, and sends the subscription request to all ASs.

Preferably, the method further includes:

After receiving the first acknowledgment response from any one of the ASs to the subscription request, the IMS notifies the user. Preferably, the method further includes:

After receiving the acknowledgment response from the remaining ASs in the all ASs to the subscription request, the IMS does not notify the user.

Preferably, the method further includes:

The correspondence between the service and the AS that can process the subscription request of the service is pre-configured in the IMS, where each service corresponds to at least one AS.

Preferably, the S-CSCF in the IMS receives a subscription request sent by the user, and determines, according to the service description information carried in the subscription request, all ASs that can process the subscription request, and forwards the subscription request to All ASs determined, and after receiving an acknowledgment response from the AS to the service subscription request, notify or not notify the user.

Preferably, the service description information is at least one of the following: a service key, a service identifier; wherein the service identifier is a service name or a service code.

An apparatus for subscribing to Forking in an IP multimedia subsystem is applied to an IMS, where the apparatus includes a receiving unit, a determining unit, and a sending unit, where

a receiving unit, configured to receive a subscription request sent by a user;

a determining unit, configured to determine, according to the service description information carried in the subscription request, all ASs that can process the subscription request;

a sending unit, configured to send the subscription request to all ASs.

Preferably, the device further includes:

And the notifying unit is configured to notify the user after the receiving unit receives the first acknowledgment response of the one of the all ASs to the subscription request.

Preferably, after receiving the acknowledgment response of the remaining ASs in the all ASs to the subscription request, the receiving unit does not notify the user.

Preferably, the device further includes:

a configuration unit for pre-configuring between the service and the AS that can handle the subscription request for the service Correspondence relationship, wherein each service corresponds to at least one AS.

An IP multimedia subsystem comprising a device for subscription to Forking in the aforementioned IP Multimedia Subsystem.

An IP multimedia subsystem, including an S-CSCF, where the S-CSCF includes a receiving unit, a determining unit, and a sending unit, where

a receiving unit, configured to receive a subscription request sent by a user;

a sending unit, configured to send the subscription request to all ASs.

Preferably, the S-CSCF further includes:

a notifying unit, configured to notify the user after the receiving unit receives the first acknowledgment response of the one of the all ASs to the subscription request;

After receiving the acknowledgement response of the remaining ASs in the all ASs to the subscription request, the receiving unit does not notify the user.

In the present invention, the correspondence between the service and the AS that can process the subscription request of the service is pre-configured in the IMS, where each service corresponds to at least one AS, that is, one service can correspond to multiple AS's. After receiving the subscription request sent by the user, the IMS determines all ASs that can process the current subscription request for the current service. At this time, the IMS sends a subscription request to all the determined ASs, and receives the first of the ASs. After the service subscription processing response is sent to the user, the IMS will not send the non-first service subscription response in the AS, and will not be sent to the user, that is, the user is blocked from the service subscriptions sent by the remaining ASs. First response. Since the present invention is not to set the service and the AS as a - corresponding, but a many-to-many relationship, after receiving the subscription request sent by the user, the subscription request can be sent to all The AS that can process the subscription request guarantees the processing of the subscription request by the AS. The IMS receives the first response from the AS to the subscription request and forwards it to the user, shielding the remaining AS from the first response to the subscription request, and maintaining the IMS to the user. The interprocess process is compatible with existing process flows. DRAWINGS

Figure 1 is a flow chart of service subscription in IMS;

2 is a flowchart of a method for subscribing to Forking in an IP multimedia subsystem according to the present invention; FIG. 3 is a flowchart of obtaining a subscription service information and an AS list according to the present invention;

4 is a schematic diagram showing the structure of a device for subscribing to Forking in the IP multimedia subsystem of the present invention. detailed description

The basic idea of the present invention is to pre-configure a correspondence between a service and an AS capable of processing the service in the IMS, where each service corresponds to at least one AS, that is, one service can correspond to multiple AS's. After receiving the subscription request sent by the user, the IMS determines all ASs that can process the subscription request for the current service. At this time, the IMS sends a subscription request to all the determined ASs, and receives the first of the ASs. After the service subscription process responds, it is sent to the user. After receiving the non-first service subscription response in these ASs, the IMS will not send to the user.

Figure 1 is a flow chart of service subscription in IMS. As shown in Figure 1, the service subscription process in IMS includes the following steps:

Step 101: The user UE sends a subscription request to the IMS; that is, the UE sends a Subscribe subscription message to the S-CSCF; the subscription message includes a fixed event package;

Step 102: When receiving the subscription request message of the user, the S-CSCF triggers according to an initial filter rule (IFC, Initial Filter Criteria), and sends the message to the AS-1 according to the fixed event packet; the S-CSCF does not care about the specific event packet. content; Step 103: After receiving the subscription request message forwarded from the S-CSCF, the AS-1 processes the subscription request message, and responds to the corresponding response message 200OK.

Step 104: The S-CSCF forwards the 200 OK response message to the UE.

Step 105, AS-1 then immediately sends a NOTIFY notification message to the S-CSCF, indicating that the subscription has been successfully processed;

Step 106: The S-CSCF forwards the NOTIFY notification message to the UE.

Step 107, the UE replies with a response to the NOTIFY notification message 200 OK;

Step 108, the S-CSCF forwards the 200 OK response message to the AS-1;

Steps 109 to 124, when the UE sends the same subscription message to the IMS, that is, the S-CSCF, the S-CSCF triggers the process to the other AS according to the IFC. The process is the same as the steps 101 to 108, and details are not described herein again.

Before describing the technical solution of the present invention, the basic configuration for implementing the technical solution of the present invention will be first introduced. In the present invention, the correspondence between the service and the AS capable of processing the service needs to be pre-configured in the S-CSCF in the IMS, where each service corresponds to at least one AS, that is, one service can be more The ASs correspond to each other; moreover, multiple services can also correspond to one AS, that is, one AS can handle multiple subscription services. In the present invention, the subscription request sent by the user to the S-CSCF also carries the service description information of the service to be subscribed, such as the service key of the service to be subscribed, the service identification information such as the service name, the service code, and the like.

2 is a flowchart of a method for subscribing to Forking in an IP multimedia subsystem according to the present invention. As shown in FIG. 2, the method for subscribing to Forking in the IP multimedia subsystem of the present invention specifically includes the following steps: Step 201: A UE sends a subscription request to an IMS; The UE sends a Subscribe subscription message to the S-CSCF; the subscription message includes service description information of the subscription service, such as a service key, a service name, a service code, etc.; those skilled in the art should understand that any information related to the subscription service can be used as Subscribe to the business description information of the business.

Step 202: When receiving the subscription request message of the user, the S-CSCF extracts the service description information in the message. Step 203: The S-CSCF searches for a list of all ASs that can process the subscription request message according to the extracted service description information and the configuration table.

Step 204: The S-CSCF copies the Subscribe subscription message and prepares to send it to all ASs that meet the conditions. Here, the AS that meets the condition that matches the configuration table, that is, the AS that can process the user's subscription request;

Step 205, the S-CSCF sends a Subscribe subscription message to the AS-1;

Step 206: The S-CSCF sends the Subscribe subscription message to the remaining ASs that meet the conditions. In this example, the AS-2 to AS-N-1 are numbered, and the Subscribe subscription message is sent to the AS-2 to the AS-N-1.

Step 207, the S-CSCF sends a Subscribe subscription message to the AS-N;

It should be noted that, in FIG. 2, only for the purpose of clear illustration, the ASs are numbered and the S-CSCF is sequentially sent to the ASs. In actual applications, the S-CSCFs can send Subscribes to the ASs in parallel. Subscribe to the message;

Step 208: All ASs satisfying the condition process the subscription request message, and reply 200 OK to the S-CSCF; the first response 200 OK received by the S-CSCF may be any one of the conditions AS, that is, AS-1 The 200 OK of the reply may also be the 200 OK of the AS-N reply, and may of course be the response of the AS of the other label. The present invention uses the AS-1 as the example of the 200 OK AS that first responds to the S-CSCF.

Step 209: The S-CSCF forwards the received first response 200 OK message to the UE.

Steps 210 to 211: If the 200 OK response returned in the AS-1 to AS_N that satisfies the condition is not the first 200 OK response received by the S-CSCF, the S-CSCF intercepts the 200 OK response of the subsequent reply, and does not Send to the UE;

Step 212: After successfully processing the subscription message, the AS-1 sends a NOTIFY notification message to the S-CSCF, indicating that the processing has been successfully accepted;

Step 213: The S-CSCF forwards the notification message to the UE. Step 214, the UE replies to the response to the NOTIFY notification message 200OK; Step 215, the S-CSCF forwards the 200 OK response message to the AS-1;

Step 216 to step 223, the notification processing flow of other ASs is the same as step 212 to step 215, and details are not described herein again.

In step 216 to step 223, after receiving the NOTIFY notification message of the remaining AS for the subscription request, the message is still forwarded to the UE to facilitate the user to know related information of the subscribed service. The present invention implements subscription Forking by sending the subscription request to more than one AS for a subscription request. The S-CSCF of the present invention can forward to the UE in the order of receiving the NOTIFY notification message of the AS.

FIG. 3 is a flowchart of obtaining a subscription service information and an AS list according to the present invention. As shown in FIG. 3, the process for obtaining subscription service information and an AS list includes the following steps:

Step 301: The UE sends a subscription request to the IMS; that is, the UE sends a Subscribe subscription message to the S-CSCF; the subscription message includes the service description information of the subscription service: the service key 10235, the service name unconditional forwarding, the service abbreviation CFU; the service description information Not limited to the above;

Step 302: When receiving the subscription request message of the user, the S-CSCF extracts the service description information in the message: the service key 10235, the unconditional forwarding of the service name, the service abbreviation CFU, and the like;

Step 303: The S-CSCF extracts the service description information, searches the configuration information table, and finds all AS lists that can process the subscription request message. The ASs that can be processed according to the table are AS-1, AS-3, and AS. — 7;

Step 304: The S-CSCF copies the Subscribe subscription message, and prepares to send to all ASs that meet the conditions: AS-1, AS-3, AS-7;

Step 305, the S-CSCF sends a Subscribe subscription message to the AS-1;

Step 306, the S-CSCF sends a Subscribe subscription message to the AS-3;

Step 307: The S-CSCF sends a Subscribe subscription message to the AS-7.

The order in which the Subscribe subscription message is sent to the AS is only for convenience of explaining the present invention. Technical solutions are not intended to be limiting. Those skilled in the art should understand that the manner in which the S-CSCF sends the subscribe message to the Subscribe may be a manner of sending in parallel.

The processing steps after step 307 are exactly the same as the processing steps of step 208 to step 223 shown in FIG. 2 above, and the implementation details thereof will not be described herein.

In the present invention, as shown in FIG. 3, the service description information may also be related information of other services, such as a service key of 10236, a service name of unconditional forwarding, a service abbreviation of CFNA, a service key of 10237, and a service name of Disturb, business acronym CFNA business.

4 is a schematic structural diagram of a device for subscribing to a forking in the IP multimedia subsystem of the present invention. As shown in FIG. 4, the device for subscribing to the Forking device in the IP multimedia subsystem of the present invention is applied to the IMS, and includes a receiving unit 40 and a determining unit 41. And a transmitting unit 42 , wherein

The receiving unit 40 is configured to receive a subscription request sent by the user.

The determining unit 41 is configured to determine, according to the service description information carried in the subscription request, all ASs that can process the subscription request;

The sending unit 42 is configured to send the subscription request to all the ASs.

Based on the device subscribed to Forking in the IP multimedia subsystem shown in FIG. 4, the device for subscription to Forking in the IP multimedia subsystem of the present invention further includes:

The notifying unit (not shown) is configured to notify the user after the receiving unit receives the first acknowledgment response of the one of the all ASs to the subscription request.

And, after receiving the non-first acknowledgment response of the remaining ASs of the all ASs to the subscription request, the receiving unit 40 does not notify the user.

The configuration unit (not shown in FIG. 4) is configured to pre-configure a correspondence between the service and the AS that can process the subscription request of the service, where each service corresponds to at least one AS.

The foregoing service description information is at least one of the following information: a service key, a service identifier, where The service identifier is a business name or a business code.

It should be understood by those skilled in the art that the device for subscription to Forking in the IP multimedia subsystem shown in FIG. 4 is designed to implement the method for subscribing to Forking in the foregoing IP multimedia subsystem, and the implementation functions of the foregoing processing units can be referred to. The foregoing description of the method of subscribing to Forking in the IP Multimedia Subsystem is understood. The functions of the various processing units in the figures may be implemented by a program running on a processor or by a specific logic circuit.

The present invention also describes an IP Multimedia Subsystem comprising the device for subscription to Forking in the IP Multimedia Subsystem shown in Figure 4 above.

The present invention also describes another IP multimedia subsystem, including an S-CSCF, where the S-CSCF includes a receiving unit, a determining unit, and a sending unit, where

a receiving unit, configured to receive a subscription request sent by a user;

a sending unit, configured to send the subscription request to all ASs.

The S-CSCF further includes:

After receiving the non-first acknowledgment response of the remaining ASs in the all ASs to the subscription request, the receiving unit does not notify the user.

Those skilled in the art will appreciate that the S-CSCF described herein can implement all of the functions of the device that subscribes to Forking in the IP Multimedia Subsystem shown in Figure 4 above.

The above is only the preferred embodiment of the present invention and is not intended to limit the scope of the present invention.

Claims

Claim

A method for subscribing to Forking in an IP multimedia subsystem, characterized in that: the method comprises:

After receiving the subscription request sent by the user, the IMS determines, according to the service information carried in the subscription request, all application servers AS that can process the subscription request, and sends the subscription request to all ASs.

The method according to claim 1, wherein the method further comprises: after receiving, by the IMS, the first acknowledgement response of the one of the all ASs to the subscription request, notifying the User.

The method according to claim 2, wherein the method further comprises: after receiving the acknowledgment response of the remaining ASs in the all ASs to the subscription request, the IMS does not notify the user .

The method according to claim 1, wherein the method further comprises: pre-configuring a correspondence between the service and an AS that can process the subscription request of the service in the IMS, where each service corresponds to At least one AS.

The method according to any one of claims 1 to 4, wherein the service call session control function entity S-CSCF in the IMS receives a subscription request sent by the user, and is carried according to the subscription request. The service description information determines all ASs that can process the subscription request, forwards the subscription request to all determined ASs, and, after receiving an acknowledgment response from the AS to the subscription request, notifying or not User.

The method according to any one of claims 1 to 4, wherein the service description information is at least one of the following: a service key, a service identifier; wherein the service identifier is a service name or a service Code.

A device for subscribing to a forking in an IP multimedia subsystem, which is applied to an IMS, wherein the device includes a receiving unit, a determining unit, and a sending unit, where a receiving unit, configured to receive a subscription request sent by a user;

a sending unit, configured to send the subscription request to all ASs.

The device according to claim 7, wherein the device further comprises: a notification unit, configured to receive, by the receiving unit, the first one of the ASs of the all ASs to the subscription request After confirming the response, notify the user.

The device according to claim 8, wherein the receiving unit does not notify the user after receiving an acknowledgment response from the remaining ASs in the all ASs to the subscription request. .

The device according to claim 7, wherein the device further comprises: a configuration unit, configured to pre-configure a correspondence between a service and an AS capable of processing a subscription request of the service, where each service Corresponds to at least one AS.

The device according to any one of claims 7 to 10, wherein the service description information is at least one of the following: a service key, a service identifier; wherein the service identifier is a service name or a service Code.

12. An IP Multimedia Subsystem, comprising: means for subscribing to Forking in the IP Multimedia Subsystem of any one of claims 7 to 11.

An IP multimedia subsystem, comprising an S-CSCF, wherein the S-CSCF includes a receiving unit, a determining unit, and a sending unit, where

a receiving unit, configured to receive a subscription request sent by a user;

a sending unit, configured to send the subscription request to all ASs.

The system of claim 13, wherein the S-CSCF further comprises: a notification unit, configured to notify the user after the receiving unit receives the first acknowledgment response of the one of the all ASs to the subscription request;