CN103905380A

CN103905380A - Service call method, device and system

Info

Publication number: CN103905380A
Application number: CN201210573169.7A
Authority: CN
Inventors: 乐利锋; 彭晋
Original assignee: China Mobile Communications Group Co Ltd
Current assignee: China Mobile Communications Group Co Ltd
Priority date: 2012-12-25
Filing date: 2012-12-25
Publication date: 2014-07-02
Anticipated expiration: 2032-12-25
Also published as: CN103905380B

Abstract

The invention provides a service call method, device and system. One scheme adopted in the invention is that the media address and port information of a calling user are acquired from a calling request of a calling client through a calling side gateway and sent to a called side gateway, and the media address and port information of a called user are acquired from a calling response of a called client and sent to the calling side gateway through the called side gateway to make the calling and called clients capable of acquiring the media address and port information of an opposite end client from the access gateway so as to realize the media direct transmission between the calling client and the called client. Another scheme adopted in the invention is that a proxy device is arranged in the access network, the proxy device is used to acquire and store the media address and port information of the calling and called clients and send the media address and port information to the opposite end through the access gateway of the calling and called clients so as to realize the media direct transmission between the calling client and the called client.

Description

A kind of service call method, apparatus and system

Technical field

The present invention relates to communication technical field, especially a kind of service call method, apparatus and system.

Background technology

RTCWeb(Real Time Communication web, based on the Real-time Communication Technology of Web browser) system is by RTC-GW(Real Time Communication Gateway, real time communication gateway) and RTCWeb client composition, as shown in Figure 1, RTCWeb client realizes and IMS(IP Multimedia Subsystem by RTC-GW, IP Multimedia System) network service, wherein, between RTCWeb client and RTC-GW, form Client(client)/Server(server) communication of mode, comprise RTCWeb signaling and RTP(Real-time Transport Protocol, real time transport protocol) media are mutual.RTC-GW has realized back-to-back user agent (B2BUA), transform RTCWeb signaling and media encoding and decoding and go adaptive IMS signaling and media encoding and decoding, the SBC(Session Border Controller of final access IMS network, traffic border controller equiment), complete RTCWeb client and IMS intercommunication.

Realizing in process of the present invention, applicant finds to exist in prior art following defect:

Because SBC is receiving after RTCWeb signaling, media information in RTCWeb signaling can be replaced by the media information of self, therefore for RTCWeb client, SBC is visible, the RTCWeb client of Correspondent Node is sightless, thereby between RTCWeb client, cannot realize media and direct transfer.For the call of those media without the internal network of Lawful Interception, the SBC that still needs to detour of the media between RTCWeb client transmits, and has increased the pressure of SBC.

Summary of the invention

The embodiment of the present invention provides a kind of service call method, apparatus and system, cannot realize the problem that media direct transfer in order to solve in prior art between client.

The embodiment of the present invention provides a kind of service call method, comprising:

Access Network gateway receives after the call request of calls customer end transmission, parse calling subscriber's media address and port information, and in the time determining Access Network gateway that called party client end belongs to for this gateway, the calling subscriber's that preservation parses media information and port information, in the time determining Access Network gateway that called party client end belongs to and being not this gateway, the Access Network gateway that sends to called party client end to belong to the calling subscriber's who parses media address and port information, so that the Access Network gateway that called party client end belongs to sends to called party client end by the call request receiving from IMS network by described calling subscriber's media address and port information,

Access Network gateway receives after the call that called party client end returns, parse called subscriber's media address and port information, and in the time determining Access Network gateway that calls customer end belongs to for this gateway, the called subscriber's that preservation parses media information and port information, in the time determining Access Network gateway that called party client end belongs to and being not this gateway, the Access Network gateway that sends to calls customer end to belong to the called subscriber's who parses media address and port information, so that the Access Network gateway that calls customer end belongs to sends to described calls customer end by the call receiving from IMS network by described called subscriber's media address and port information,

Preferably, Access Network gateway receives after the call request of calls customer end transmission, also comprises: revise media address and the port information of the calling subscriber in described call request, amended call request is sent to IP multimedia system IMS network;

The Access Network gateway that called party client end belongs to sends to described called party client end by the call request receiving from IMS network by described media address and port information, specifically comprises:

The Access Network gateway that called party client end belongs to receives call request from IMS network, by the media address of the calling subscriber in call request and port information, be revised as the received calling subscriber's of Access Network gateway that this gateway is preserved or that belong to from calls customer end media address and port information, and amended call request is sent to called party client end;

Access Network gateway receives after the call that called party client end returns, and also comprises: revise media address and the port information of the called subscriber in call, and amended call is sent to IMS network;

The Access Network gateway that calls customer end belongs to sends to described calls customer end by the call receiving from IMS network by described called subscriber's media address and port information, specifically comprises:

The Access Network gateway that calls customer end belongs to receives call from IMS network, by the media address of the called subscriber in call and port information, be revised as the received called subscriber's of Access Network gateway that this gateway is preserved or that belong to from called party client end media address and port information, and amended call is sent to calls customer end.

Preferably, Access Network gateway also comprised amended call request before IMS network sends: amended call request is converted to the call request of Session initiation protocol SIP agreement; Access Network gateway also comprised before amended call request is sent to called party client end: the agreement adopting according to called party client end, is converted to amended call request the call request of respective protocol; Access Network gateway was also comprising amended call before IMS network sends: the call that amended call is converted to Session Initiation Protocol; Access Network gateway sends to amended call before calls customer end and also comprises: the agreement adopting according to calls customer end, is converted to amended call the call of respective protocol;

Preferably, described amended call request is sent to IMS network, specifically comprise: amended call request is sent to boarder controller SBC, and the media address of SBC to the calling subscriber in the call request receiving and port information send to IMS network after modifying; Described Access Network gateway is from the request of IMS network receipt of call, specifically comprise: described Access Network gateway is from the request of SBC receipt of call, described call request is that described SBC is receiving call request from IMS network, revises and is transmitted to described Access Network gateway after calling subscriber's wherein media address and port information; Described amended call is sent to IMS network, specifically comprise: amended call is sent to SBC, and the media address of SBC to the called subscriber in the call receiving and port information send to IMS network after modifying; Described Access Network gateway responds from IMS network receipt of call, specifically comprise: described Access Network gateway responds from SBC receipt of call, described call is that described SBC is receiving call from IMS network, revises and is transmitted to described Access Network gateway after called subscriber's wherein media address and port information;

Preferably, the described Access Network gateway that sends to called party client end to belong to the calling subscriber's who parses media address and port information, specifically comprises: the Access Network gateway that sends to called party client end to belong to by IP protocol message the calling subscriber's who parses media address and port information; The described Access Network gateway that sends to calls customer end to belong to the called subscriber's who parses media address and port information, specifically comprises: the Access Network gateway that sends to calls customer end to belong to by IP protocol message the called subscriber's who parses media address and port information.

The embodiment of the present invention provides a kind of Access Network gateway device, comprising:

Call request processing module, for receiving after the call request of calls customer end transmission, parse calling subscriber's media address and port information, determine the Access Network gateway that called party client end belongs to, in the time determining Access Network gateway that called party client end belongs to for this gateway, the calling subscriber's who parses media information and port information are saved in to user profile preservation module, in the time determining Access Network gateway that called party client end belongs to and being not this gateway, the Access Network gateway that sends to called party client end to belong to by user information exchange module the calling subscriber's who parses media address and port information, so that the Access Network gateway that called party client end belongs to sends to called party client end by the call request receiving from IMS network by described calling subscriber's media address and port information,

Call processing module, for receiving after the call that called party client end returns, parse called subscriber's media address and port information, determine the Access Network gateway that called party client end belongs to, in the time determining Access Network gateway that calls customer end belongs to for this gateway, the called subscriber's who parses media information and port information are saved in to user profile preservation module, in the time determining Access Network gateway that called party client end belongs to and being not this gateway, the Access Network gateway that sends to calls customer end to belong to by user information exchange module the called subscriber's who parses media address and port information, so that the Access Network gateway that calls customer end belongs to sends to calls customer end by the call receiving from IMS network by described called subscriber's media address and port information,

User profile is preserved module, for preserving media address and the port information of calls customer end and called party client end;

User information exchange module, for belong to for calls customer end at this equipment Access Network gateway time, the media address of calls customer end and port information are sent to the Access Network gateway of called party client end ownership, receive media address and the port information of the called party client end that the Access Network gateway of called party client end ownership sends; Belong to for called party client end at this equipment Access Network gateway time, receive media address and the port information of the calls customer end that the Access Network gateway of calls customer end ownership sends, the media address of called party client end and port information are sent to the Access Network gateway of called party client end ownership;

Preferably, described call request processing module also for, revise media address and the port information of the calling subscriber in described call request, amended call request is sent to IP multimedia system IMS network;

Described call request processing module specifically for, receive call request from IMS network, by the media address of the calling subscriber in call request and port information, be revised as the received calling subscriber's of Access Network gateway that this gateway is preserved or that belong to from calls customer end media address and port information, and amended call request is sent to called party client end;

Described call processing module also for, revise media address and the port information of the called subscriber in call, and amended call sent to IMS network;

Described call processing module specifically for, receive call from IMS network, by the media address of the called subscriber in call and port information, be revised as the received called subscriber's of Access Network gateway that this gateway is preserved or that belong to from called party client end media address and port information, and amended call is sent to calls customer end.

Preferably, described call request processing module is also for before sending amended call request to IMS network, amended call request is converted to the call request of Session initiation protocol SIP agreement, before amended call request is sent to called party client end by described call request processing module, the agreement adopting according to called party client end, is converted to amended call request the call request of respective protocol; Described call processing module is also for before sending amended call to IMS network, amended call request is converted to the call of Session Initiation Protocol, before amended call is sent to calls customer end by described call processing module, the agreement adopting according to calls customer end, is converted to amended call the call of respective protocol;

Preferably, the Access Network gateway of described user information exchange module specifically for sending to called party client end to belong to by IP protocol message the media address of calls customer end and port information, the Access Network gateway that sends to calls customer end to belong to by IP protocol message called subscriber's media address and port information.

In the above embodiment of the present invention, Access Network gateway is receiving after the call request of calls customer end transmission, the calling subscriber's who carries in this call request media address and port information are sent to the gateway that called party client end accesses, so that the gateway that called party client end accesses is from IMS network receives the call request of this calls customer end transmission, by this call request, the media address of calls customer end and port information are sent to called party client end, thereby, make called party client end can obtain media address and the port information of calls customer end.The gateway that called party client termination enters is receiving after the call that called party client end returns, the media address of the called party client end carrying in this call and port information are sent to the gateway that calls customer end accesses, so that the gateway that this calls customer termination enters is from IMS network receives the call that this called party client end returns, by this call, the media address of called party client end and port information are sent to calls customer end, thereby make calls customer end can obtain media address and the port information of called party client end, and then calls customer end is set up and is direct transferred and be connected with the media of opposite end with port information according to the media address of opposite end with called party client end.In like manner, in the time that calls customer end and called party client end belong to same Access Network gateway, also can make calling and called both sides obtain media address and the port information of opposite end, direct transfer thereby realize media between calling and called.

The embodiment of the present invention provides a kind of service call method, is provided with agent equipment in Access Network, and the method comprises:

Agent equipment receives call request from Access Network gateway, parse calling subscriber's media address and port information and preserve, revise media address and the port information of the calling subscriber in described call request, amended call request is sent to IP multimedia system IMS network; Wherein, the call request that agent equipment receives from Access Network gateway is that described Access Network gateway is transmitted to described agent equipment the call request that receives the transmission of calls customer end;

Agent equipment receives call request from IMS network, by the media address of the calling subscriber in described call request and port information, be revised as the calling subscriber's that this equipment preserves media address and port information, and the Access Network gateway that sends to called party client end to belong to amended call request, so that this call request is transmitted to called party client end by the Access Network gateway that called party client end belongs to;

Agent equipment is from Access Network gateway receives the call that called party client end returns, parse called subscriber's media address and port information and preserve, revise media address and the port information of the called subscriber in described call, and amended call is sent to IMS network; Wherein, from Access Network gateway, to receive call that called party client end returns be described Access Network gateway to described agent equipment is transmitted to described agent equipment receiving the call that called party client end sends;

Agent equipment receives call from IMS network, by the media address of the called subscriber in described call and port information, be revised as the called subscriber's that this equipment preserves media address and port information, and the Access Network gateway that sends to calls customer end to belong to amended call, so that this call is transmitted to calls customer end by the Access Network gateway that calls customer end belongs to;

Preferably, described amended call request is sent to IMS network, specifically comprise: amended call request is sent to boarder controller SBC, and the media address of SBC to the calling subscriber in the call request receiving and port information send to IMS network after modifying; Described agent equipment, from the request of IMS network receipt of call, specifically comprises: described Access Network gateway is from the request of SBC receipt of call; Wherein, the call request receiving from SBC is that described SBC is receiving call request from IMS network, revises and is transmitted to described agent equipment after calling subscriber's wherein media address and port information; Described amended call is sent to IMS network, specifically comprise: amended call is sent to SBC, and the media address of SBC to the called subscriber in the call receiving and port information send to IMS network after modifying; Described agent equipment, from the response of IMS network receipt of call, specifically comprises: described Access Network gateway responds from SBC receipt of call; Wherein, the call receiving from SBC is that described SBC is receiving call from IMS network, revises and is transmitted to described agent equipment after called subscriber's wherein media address and port information.

The embodiment of the present invention also provides a kind of agent equipment, is applied in Access Network, comprising:

Call request processing module, for receiving call request from Access Network gateway, parse calling subscriber's media address and port information and be kept at user profile and preserve module, media address and the port information of revising the calling subscriber in call request, send amended call request to IP multimedia system IMS network; Receiving call request from IMS network, by the media address of the calling subscriber in call request and port information, be revised as described user profile and preserve the calling subscriber's who preserves in module media address and port information, and the Access Network gateway that sends to called party client end to belong to amended call request, so that this call request is transmitted to called party client end by the Access Network gateway that called party client end belongs to; Wherein, the call request receiving from Access Network gateway is that described Access Network gateway is transmitted to described agent equipment the call request that receives the transmission of calls customer end;

Call processing module, from Access Network gateway receives the call that called party client end returns, parse called subscriber's media address and port information and be kept at user profile and preserve module, revise media address and the port information of the called subscriber in call, and amended call is sent to IMS network; Receiving call from IMS network, by the media address of the called subscriber in call and port information, be revised as described user profile and preserve the called subscriber's who preserves in module media address and port information, and the Access Network gateway that sends to calls customer end to belong to amended call, so that this call is transmitted to calls customer end by the Access Network gateway that calls customer end belongs to; The call that the called party client end receiving from Access Network gateway returns is that described Access Network gateway is transmitted to described agent equipment the call that receives the transmission of calls customer end;

User profile is preserved module, for preserving calling subscriber and called subscriber's media address and port information.

The embodiment of the present invention also provides a kind of access net system, comprises Access Network gateway device, and as above-mentioned agent equipment, wherein:

Access Network gateway device, for call request being transmitted to described agent equipment in the time receiving the call request of calls customer end transmission, receiving after the call request of IMS network transmission, according to the called number carrying in call request, call request is sent to corresponding client, after receiving the call that called party client end returns, call is transmitted to described agent equipment, receiving after the call of IMS network transmission, according to the calling number of carrying in call, call is sent to corresponding client.

In the above embodiment of the present invention, because the gateway that calls customer termination enters is being received after the call request of calls customer end, do not revise media address and the port information of the calling subscriber in this request, but be transmitted to agent equipment, and the gateway that called party client termination enters is being received after the call that called party client end returns, do not revise media address and the port information of the called subscriber in this response, thereby make agent equipment can obtain media address and the port information of calls customer end and called party client end, and send to opposite end client, and then make caller and called party client end set up media according to the media address of opposite end and port information to direct transfer and be connected.

Accompanying drawing explanation

Fig. 1 is the networking structure schematic diagram of RTCWeb system in prior art;

The schematic flow sheet of setting up service call that Fig. 2 provides for the embodiment of the present invention one;

The schematic flow sheet of setting up service call that Fig. 3 provides for the embodiment of the present invention two;

The network structure of the RTCWeb system that is provided with agent equipment that Fig. 4 provides for the embodiment of the present invention three;

The schematic flow sheet of setting up service call that Fig. 5 provides for the embodiment of the present invention three;

The structural representation of a kind of Access Network gateway that Fig. 6 provides for the embodiment of the present invention;

The structural representation of a kind of agent equipment that Fig. 7 provides for the embodiment of the present invention.

Embodiment

Below in conjunction with accompanying drawing, the embodiment of the present invention is described in detail.

The embodiment of the present invention is applied to the network environment of RTCWeb system and the IMS network integration.RTC system comprises RTC client and RTC gateway, between RTC client and RTC gateway, adopts C/S(client/server) framework, RTC gateway is connected with the SBC of its ownership.SBC, in IMS network edge, for IP access, intercommunication and safeguard protection, is present between Access Network and IMS network, is the access point that user accesses IMS network.RTC gateway is for realizing the back-to-back agency to RTC client, the media address of each RTC client and port information are revised as to unified, fixing media address and port information, and the RTC signaling (such as call request and call) of the different agreement form that RTC client is initiated (such as websocket agreement etc.) is converted to SIP(session initialization protocol, session initialization protocol, SIP) signaling of form, RTC client can be realized and the intercommunication of the SBC of IMS network.

Below in conjunction with concrete application scenarios, elaborate the embodiment of the present invention and realize the idiographic flow that media direct transfer.For convenience of description, below in application scenarios all to adopt websocket agreement between RTC client (hereinafter to be referred as client) and RTC gateway (hereinafter to be referred as gateway), between RTC gateway and SBC, adopting Session Initiation Protocol is that example describes.

Embodiment mono-

In the present embodiment, client a IAD A, client b IAD B, gateway A belongs to SBC A, and gateway B belongs to SBC B.When after the client a request of making a call to client b, between client a and client b, set up the idiographic flow of service call as shown in Figure 2:

Step 201 ~ 202, gateway A receives after the websocket call request of client a initiation, parse called access code in this call request and calling subscriber's media address and port information (being media address and the port information of calls customer end a), determining according to called access code the gateway that called party client end b accesses is gateway B, the media address of the calls customer end a parsing and port information is sent to the gateway B that client b accesses.Such as, gateway A can be passed through the information exchange message of IP agreement, and the media address of calls customer end a and port information are sent to gateway B.Gateway B receives after the information exchange message of gateway A transmission, parses media address and the port information of the calls customer end a wherein carrying, and is stored in this locality.

Conventionally, the mapping table of pre-stored access code and gateway address in each gateway, gateway A can be searched according to the called access code parsing the mapping table of access code and gateway address, gets the address of gateway B, and then information exchange message is sent to gateway B.

Step 203, gateway A is by the calling subscriber's who carries in websocket call request media address and port information, be revised as media address and the port information of gateway A, this websocket call request is converted to SIP call request, and the SBCA belonging to by gateway A be sent to IMS network.SBCA is not shown in the diagram.

In this process, gateway A sends to SIP call request the SBCA of gateway A ownership, SBCA receives after the SIP call request of gateway A transmission, by the calling subscriber's who carries in this SIP call request media address and port information, be revised as media address and the port information of SBCA, and amended SIP call request is sent to IMS network.This process is consistent to the process of SIP call request with SBC in prior art.

It is pointed out that gateway A can first generate information exchange information and sending to gateway B, also can first call request be converted to SIP call request and be forwarded to the SBC that gateway A belongs to, the execution sequence of said process can't affect the enforcement of the embodiment of the present invention.

Step 204, IMS network belongs to SIP call request SBCB by gateway B is sent to the SBCB that called access code is corresponding.SBCB is receiving after SIP call request, the calling subscriber's who carries media address and port information is revised as to self media address and port information, and is forwarded to gateway B in this call request.SBCB is not shown in the diagram.This process is consistent with process of the prior art, does not repeat them here.

Step 205, gateway B receives after the SIP call request of SBCB transmission, the media address of the client a sending according to gateway A in step 202 and port information, the media address of calling subscriber in SIP call request and port information are revised as to media address and the port information of client a, amended SIP call request is converted to websocket call request, and according to called access code, websocket call request is sent to client b.

Step 206, client b replys this websocket call request, send websocket call to gateway B, the called subscriber's who wherein carries media address and port information are media address and the port information of client b, and calling subscriber's access code is the access code of client a.

Step 207, gateway B parses media address and the port information of called party client end b from this websocket call, and the access code of calls customer end a, determine according to the access code of calls customer end a the gateway A that calls customer end a belongs to, media address and the port information of the called party client end b parsing are sent to gateway A.Such as, gateway B can be sent to gateway A by media address and the port information of called party client end b by the information exchange message of IP agreement.Gateway A receives after the information exchange message of gateway B transmission, obtains media address and the port information of client b wherein, and is stored in this locality.

Step 208, gateway B is revised as the media address of the called subscriber in websocket call and port information media address and the port information of self, websocket call is converted to SIP call, and the SBCB belonging to by it is sent to IMS network.

In this process, gateway B sends to SIP call the SBCB of gateway B ownership, SBCB receives after the SIP call of gateway B transmission, the called subscriber's who carries in this SIP call media address and port information are revised as to self media address and port information, and amended SIP call is sent to IMS network.This process is consistent with process of the prior art, does not repeat them here.

It is to be noted, gateway B can first generate information exchange information and sending to gateway A, the SBC that also can first websocket call be converted to SIP call and be forwarded to ownership, the change of said process execution sequence can't affect the enforcement of the embodiment of the present invention.

Step 209, SIP call is sent to the SBCA that caller access code is corresponding by IMS network.SBCA is revised as the called subscriber's who carries in this SIP call media address and port information media address and the port information of SBCA, and is forwarded to gateway A.

Step 210, gateway A receives after the SIP call of SBCB transmission, according to the media address of the client b that in step 207, gateway B sends and port information, the media address of called subscriber in SIP call and port information are revised as to media address and the port information of client b, and amended SIP call is converted to websocket call, websocket call is sent to client a.Client a receives after the websocket call of gateway A transmission, obtains media address and the port information of the client b wherein carrying, and is stored in this locality.

Step 211, client a and client b set up media according to the media address of opposite end and port information and direct transfer and be connected.

Can find out by above flow process, gateway is receiving after the call request of calls customer end transmission, when this call request is sent to IMS network by SBC, also the calling subscriber's who carries in this call request media address and port information are sent to the gateway that called party client end accesses, so that the gateway that called party client end accesses is from SBC receives the call request of this calls customer end transmission, calling subscriber's wherein media address and port information are revised as to media address and the port information of this calls customer end, thereby make called party client end can obtain media address and the port information of calls customer end.In like manner, the gateway that called party client termination enters is receiving after the call that called party client end returns, the media address of the called party client end carrying in this call and port information are sent to the gateway that calls customer end accesses, so that the gateway that this calls customer termination enters is from SBC receives the call that this called party client end returns, called subscriber's wherein media address and port information are revised as to media address and the port information of called party client end, thereby make calls customer end can obtain media address and the port information of called party client end, and then calls customer end is set up and is direct transferred and be connected with the media of opposite end with port information according to the media address of opposite end with called party client end.

Embodiment bis-

In the embodiment of the present invention, the equal IAD C of calls customer end a and called party client end b, after client a makes a call to client b, as shown in Figure 3, the step of setting up service call is as follows:

Step 301 ~ 302, gateway C receives after the websocket call request of client a initiation, parse the called access code that carries in this websocket call request and calling subscriber's media address and port information (being media address and the port information of calls customer end a), it is this gateway that gateway C determines according to called access code the gateway that called party client end b accesses, therefore by the calling subscriber's who carries in this websocket call request media address and port information, be revised as media address and the port information of this gateway, amended websocket call request is converted to the call request of Session Initiation Protocol, and send IMS network by SBC.Not shown SBC.

In this process, gateway C sends to SIP call request the SBC of gateway C ownership, this SBC receives after the SIP call request of gateway C transmission, by the calling subscriber's who carries in this SIP call request media address and port information, be revised as media address and the port information of this SBC, and amended SIP call request is sent to IMS network.

Step 303, IMS network completes after the processing of SIP call request, this SIP call request is sent to SBC, SBC is by the calling subscriber's who carries in this SIP call request media address and port information, be revised as media address and the port information of this SBC, amended SIP call request is sent to gateway C.This process is consistent to the processing procedure of SIP call request with SBC in prior art.

Step 304, gateway C receives after the SIP call request of SBC transmission, the media address of the client a parsing according to step 301 ~ 302 and port information, the calling subscriber's who carries in SIP call request media address and port information are revised as to media address and the port information of client a, and amended SIP call request is converted to websocket call request, according to the called access code carrying in websocket call request, websocket call request is sent to client b.Client b receives the websocket call request that gateway C sends, and obtains the calling subscriber's who carries in websocket call request media address and port information (being media address and the port information of client a), and is stored in this locality.

Step 305, client b replys this websocket call request, return to websocket call to gateway C, wherein called subscriber's media address and port information are media address and the port information of client b, and calling subscriber's access code is the access code of client a.

Step 306, gateway C receives the websocket call that client b sends, parse the caller access code that carries in websocket call and called subscriber's media address and port information (being media address and the port information of client b), it is this gateway that gateway C determines according to caller access code the gateway that calls customer end a accesses, therefore by the called subscriber's who carries in this websocket call media address and port information, be revised as media address and the port information of this gateway, amended websocket call is converted to the call of Session Initiation Protocol, and the SBC belonging to by it is sent to IMS network.

In this process, gateway C sends to SIP call the SBC of gateway C ownership.SBC receives after the SIP call of gateway C transmission, by the called subscriber's who carries in this SIP call media address and port information, is revised as media address and the port information of this SBC, and amended SIP call is sent to IMS network.

Step 307, IMS network completes after the processing of SIP call, this SIP call is sent to SBC, SBC is by the called subscriber's who carries in this SIP call media address and port information, be revised as media address and the port information of this SBC, amended SIP call is sent to gateway C.This process is consistent to the processing procedure of SIP call request with SBC in prior art.

Step 308, gateway C receives the SIP call that SBC sends, according to the media address of the client b parsing in step 306 and port information, the media address of called subscriber in SIP call and port information are revised as to media address and the port information of client b, and amended SIP call is converted to websocket call, according to the caller access code carrying in websocket call, websocket call is sent to client a.Client a receives the websocket call that gateway C sends, and obtains the called subscriber's who carries in websocket call media address and port information (being media address and the port information of client b), and is stored in this locality.

Step 309, client a and b set up media according to the media address of Correspondent Node and port information and direct transfer and be connected.

In the embodiment of the present invention, in the situation that calls customer end and called party client termination enter same gateway, gateway is receiving after the call request of calls customer end transmission, when this call request is sent to IMS network by SBC, also preserve the calling subscriber's who carries in this call request media address and port information, thereby receive from SBC at this gateway the call request of this calls customer end transmission, calling subscriber's wherein media address and port information are revised as to media address and the port information of this calls customer end, so that called party client end can obtain media address and the port information of calls customer end.In like manner, this gateway is receiving after the call that called party client end returns, preserve media address and the port information of the called party client end carrying in this call, and receiving from SBC the call that this called party client end returns, called subscriber's wherein media address and port information are revised as to media address and the port information of called party client end, thereby make calls customer end can obtain media address and the port information of called party client end, and then calls customer end is set up and is direct transferred and be connected with the media of opposite end with port information according to the media address of opposite end with called party client end.

Embodiment tri-

In the embodiment of the present invention, agent equipment is set in Access Network, agent equipment is connected with each gateway, and be connected with SBC, agent equipment is mainly used in communicating with SBC, call request or call are sent to IMS core net by SBC, and send to gateway from SBC receives call request or call.According to network design needs, one or more agent equipments can be set in Access Network.Agent equipment can be an equipment, can be also the group device that has realized information sharing.Agent equipment can be realized by gateway device.The present embodiment is take agent equipment as gateway as example is described.

Be illustrated in figure 4 the network structure that is provided with agent equipment that the embodiment of the present invention provides, wherein gateway M is configured to agent equipment.Client a IAD A, client b IAD B, gateway A is all connected (not shown SBC) with gateway B with the SBC of ownership by gateway M.Based on this group-network construction, initiate, after the call request of client b, to set up service call flow process as shown in Figure 5 at client a:

Step 501 ~ 502, gateway A receives after the websocket call request of client a initiation, this websocket call request is converted to the call request of Session Initiation Protocol, and SIP call request is sent to gateway device M.Media address and the port information of client a in this SIP call request, are carried.

In this step, gateway A is in the time carrying out protocol conversion, and the media address and the port information that retain client a are not modified.

Step 503, gateway M receives after SIP call request, obtains media address and the port information of the client a carrying in SIP call request, and is kept at this locality.Gateway M, by the media address of the calling subscriber in this SIP call request and port information (being media address and the port information of client a), is revised as media address and the port information of gateway M, and SIP call request is transmitted to IMS network by SBC.SCB does not illustrate in the drawings.

In this step, gateway M sends to SIP call request the SBC of gateway M ownership, the SBC of gateway M ownership receives after the SIP call request of gateway M transmission, the calling subscriber's who carries in this SIP call request media address and port information are revised as to self media address and port information, and amended SIP call request is sent to IMS network.

Step 504, IMS network is sent to SIP call request the SBC of gateway M ownership, the SBC of gateway M ownership is revised as the calling subscriber's who carries in this SIP call request media address and port information self media address and port information, and this SIP call request is sent to gateway M.Said process is consistent to the processing procedure of SIP call request with SBC in prior art, does not repeat them here.

Step 505, gateway M receives after the SIP call request of SBC transmission of its ownership, according to the media address of the client a obtaining in step 502 and port information, the calling subscriber's who carries in SIP call request media address and port information are revised as to media address and the port information of client a, and according to called access code, amended SIP call request are sent to gateway B.

Step 506, gateway B receives after the SIP call request of gateway M transmission, SIP call request is converted to websocket call request, and according to the called access code carrying in websocket call request, websocket call request is sent to client b.Client b receives the websocket call request that gateway B sends, and obtains media address and the port information of the client a carrying in websocket call request, and is stored in this locality.

Step 507, client b replys this websocket call request, return to websocket call to gateway B, wherein called subscriber's media address and port information are media address and the port information of client b, and calling subscriber's access code is the access code of client a.

Step 508, gateway B receives after the websocket call of client b initiation, converts this call to SIP call, and SIP call is sent to gateway M; Media address and the port information of client b in this SIP call, are carried.

Step 509, gateway M receives after SIP call, obtains media address and the port information of the client b carrying in SIP call and is kept at this locality.This SIP call is sent to IMS network by SBC.

In this step, gateway M sends to SIP call the SBC of gateway M ownership.The SBC of gateway M ownership receives after the SIP call of gateway device M transmission, the calling subscriber's who carries in this SIP call media address and port information are revised as to self media address and port information, and amended SIP call is sent to IMS network.This process is consistent to the processing procedure of SIP call request with SBC in prior art.

Step 510, IMS network is sent to SIP call the SBC of gateway M ownership, the SBC of gateway M ownership is revised as the called subscriber's who carries in this SIP call media address and port information self media address and port information, and this SIP call is sent to gateway M.This process is consistent with process of the prior art, does not repeat them here.

Step 511, gateway M receives after the SIP call of SBC transmission, according to the media address of the client b obtaining in step 508 and port information, the called subscriber's who carries in SIP call media address and port information are revised as to media address and the port information of client b, and SIP call is sent to gateway A.

Step 512, SIP call is converted to websocket call by gateway A, and according to the caller access code carrying in websocket call, websocket call is sent to client a.Client a receives the websocket call that gateway A sends, and obtains media address and the port information of the client b carrying in websocket call, and is stored in this locality.

Step 513, client a and client b set up media according to the media address of Correspondent Node and port information and direct transfer and be connected.

In the embodiment of the present invention, because the gateway that calls customer termination enters is being received after the call request of calls customer end, do not revise media address and the port information of the calling subscriber in this request, but be transmitted to agent equipment, and the gateway that called party client termination enters is being received after the call that called party client end returns, do not revise media address and the port information of the called subscriber in this response, thereby make agent equipment can obtain media address and the port information of calls customer end and called party client end, and send to opposite end client, and then make caller and called party client end set up media according to the media address of opposite end and port information to direct transfer and be connected.

In the network architecture that is provided with agent equipment, all access the situation of same gateway for calls customer end and called party client end, its call flows and above-mentioned flow process are similar, are not described in detail in this.

It is a kind of for realizing the Access Network gateway of said method embodiment mono-and two that the embodiment of the present invention also provides, and as shown in Figure 6, this Access Network gateway comprises:

Call request processing module 601, for receiving after the call request of calls customer end transmission, parse calling subscriber's media address and port information, determine the Access Network gateway that called party client end belongs to, in the time determining Access Network gateway that called party client end belongs to for this gateway, the calling subscriber's who parses media information and port information are saved in to user profile preservation module, in the time determining Access Network gateway that called party client end belongs to and being not this gateway, the Access Network gateway that sends to called party client end to belong to by user information exchange module the calling subscriber's who parses media address and port information, so that the Access Network gateway that called party client end belongs to sends to called party client end by the call request receiving from IMS network by calling subscriber's media address and port information.

Call processing module 602, for receiving after the call that called party client end returns, parse called subscriber's media address and port information, determine the Access Network gateway that called party client end belongs to, in the time determining Access Network gateway that calls customer end belongs to for this gateway, the called subscriber's who parses media information and port information are saved in to user profile preservation module, in the time determining Access Network gateway that called party client end belongs to and being not this gateway, the Access Network gateway that sends to calls customer end to belong to by user information exchange module the called subscriber's who parses media address and port information, so that the Access Network gateway that calls customer end belongs to sends to calls customer end by the call receiving from IMS network by called subscriber's media address and port information.

User profile is preserved module 603, for preserving media address and the port information of calls customer end and called party client end.

User information exchange module 604, for belong to for calls customer end at this equipment Access Network gateway time, the media address of calls customer end and port information are sent to the Access Network gateway of called party client end ownership, receive media address and the port information of the called party client end that the Access Network gateway of called party client end ownership sends; Belong to for called party client end at this equipment Access Network gateway time, receive media address and the port information of the calls customer end that the Access Network gateway of calls customer end ownership sends, the media address of called party client end and port information are sent to the Access Network gateway of called party client end ownership.

Preferably, call request processing module 601 also for, revise media address and the port information of the calling subscriber in call request, amended call request is sent to IP multimedia system IMS network;

Call processing module 602 also for, revise media address and the port information of the called subscriber in call, and amended call sent to IMS network;

Call processing module 602 specifically for, receive call from IMS network, by the media address of the called subscriber in call and port information, be revised as the received called subscriber's of Access Network gateway that this gateway is preserved or that belong to from called party client end media address and port information, and amended call is sent to calls customer end.

Preferably, call request processing module 601 is also for before sending amended call request to IMS network, amended call request is converted to the call request of Session initiation protocol SIP agreement, before amended call request is sent to called party client end by call request processing module 601, the agreement adopting according to called party client end, amended call request is converted to the call request of respective protocol, call processing module 602 is also for before sending amended call to IMS network, amended call request is converted to the call of Session Initiation Protocol, before amended call is sent to calls customer end by call processing module 602, the agreement adopting according to calls customer end, amended call is converted to the call of respective protocol.

Preferably, the Access Network gateway that user information exchange module 604 can send to called party client end to belong to by IP protocol message the media address of calls customer end and port information, the Access Network gateway that sends to calls customer end to belong to by IP protocol message called subscriber's media address and port information.

It is a kind of for realizing the agent equipment of said method embodiment tri-that the embodiment of the present invention also provides, and as shown in Figure 7, this agent equipment comprises:

Call request processing module 701, for receiving call request from Access Network gateway, parse calling subscriber's media address and port information and preserve module 703 by user profile and preserve, revise media address and the port information of the calling subscriber in call request, amended call request is sent to IP multimedia system IMS network, receiving call request from IMS network, by the media address of the calling subscriber in call request and port information, be revised as media address and the port information of calls customer end, and the Access Network gateway that sends to called party client end to belong to amended call request, so that this call request is transmitted to called party client end by the Access Network gateway that called party client end belongs to, wherein, the call request receiving from Access Network gateway is that Access Network gateway is transmitted to this agent equipment the call request that receives the transmission of calls customer end.

Call processing module 702, from Access Network gateway receives the call that called party client end returns, parse called subscriber's media address and port information and preserve module 703 by user profile and preserve, revise media address and the port information of the called subscriber in call, and amended call is sent to IMS network, receiving call from IMS network, by the media address of the called subscriber in call and port information, be revised as media address and the port information of called party client end, and the Access Network gateway that sends to calls customer end to belong to amended call, so that this call is transmitted to calls customer end by the Access Network gateway that calls customer end belongs to, the call that the called party client end receiving from Access Network gateway returns is that Access Network gateway is transmitted to this agent equipment the call that receives the transmission of calls customer end.

User profile is preserved module 703, for preserving media address and the port information of calls customer end and called party client end.

It is a kind of for realizing the access net system of said method embodiment tri-that the embodiment of the present invention also provides, in this access net system, be provided with agent equipment, agent equipment is connected with each gateway, and be connected with SBC, agent equipment is mainly used in communicating with SBC, call request or call are sent to IMS core net by SBC, and send to gateway from SBC receives call request or call.According to network design needs, one or more agent equipments can be set in Access Network.Agent equipment can be an equipment, can be also the group device that has realized information sharing, and this access net system comprises:

Agent equipment, for receiving call request from Access Network gateway, parse calling subscriber's media address and port information and preserve, revise media address and the port information of the calling subscriber in call request, amended call request is sent to IP multimedia system IMS network, receive call request from IMS network, by the media address of the calling subscriber in call request and port information, be revised as media address and the port information of calls customer end, and the Access Network gateway that sends to called party client end to belong to amended call request, so that this call request is transmitted to called party client end by the Access Network gateway that called party client end belongs to, from Access Network gateway receives the call that called party client end returns, parse called subscriber's media address and port information and preserve, revise media address and the port information of the called subscriber in call, and amended call is sent to IMS network, receive call from IMS network, by the media address of the called subscriber in call and port information, be revised as media address and the port information of called party client end, and the Access Network gateway that sends to calls customer end to belong to amended call, so that this call is transmitted to calls customer end by the Access Network gateway that calls customer end belongs to, wherein, the call request receiving from Access Network gateway is that this Access Network gateway is transmitted to this agent equipment the call request that receives the transmission of calls customer end, and the call that the called party client end receiving from Access Network gateway returns is that this Access Network gateway is transmitted to this agent equipment the call that receives the transmission of calls customer end.The structure of this agent equipment can be as shown in Figure 7.

Access Network gateway device, for call request being transmitted to agent equipment after the call request receiving the transmission of calls customer end, receiving after the call request of agent equipment transmission, according to the called number carrying in this call request, call request is sent to corresponding client, call is transmitted to this agent equipment receiving after the call that called party client end returns, receiving after the call of agent equipment transmission, according to the calling number of carrying in call, call is sent to corresponding client.

Through the above description of the embodiments, those skilled in the art can be well understood to the mode that the present invention can add essential general hardware platform by software and realize, and can certainly pass through hardware, but in a lot of situation, the former is better execution mode.Based on such understanding, the part that technical scheme of the present invention contributes to prior art in essence in other words can embody with the form of software product, this computer software product is stored in a storage medium, comprise that some instructions (can be personal computers in order to make a computer equipment, server, or the network equipment etc.) carry out the method described in each embodiment of the present invention.

It will be appreciated by those skilled in the art that accompanying drawing is the schematic diagram of a preferred embodiment, the module in accompanying drawing or flow process might not be that enforcement the present invention is necessary.

It will be appreciated by those skilled in the art that the module in the device in embodiment can be distributed in the device of embodiment according to embodiment description, also can carry out respective change and be arranged in the one or more devices that are different from the present embodiment.The module of above-described embodiment can be merged into a module, also can further split into multiple submodules.

The invention described above embodiment sequence number, just to describing, does not represent the quality of embodiment.

Disclosed is above only several specific embodiment of the present invention, and still, the present invention is not limited thereto, and the changes that any person skilled in the art can think of all should fall into protection scope of the present invention.

Claims

1. a service call method, is characterized in that, described method comprises:

Access Network gateway receives after the call request of calls customer end transmission, parse calling subscriber's media address and port information, and in the time determining Access Network gateway that called party client end belongs to for this gateway, the calling subscriber's that preservation parses media information and port information, in the time determining Access Network gateway that called party client end belongs to and being not this gateway, the Access Network gateway that sends to called party client end to belong to the calling subscriber's who parses media address and port information, so that the Access Network gateway that called party client end belongs to sends to described called party client end by the call request receiving from IMS network by described calling subscriber's media address and port information,

Access Network gateway receives after the call that called party client end returns, parse called subscriber's media address and port information, and in the time determining Access Network gateway that calls customer end belongs to for this gateway, the called subscriber's that preservation parses media information and port information, in the time determining Access Network gateway that called party client end belongs to and being not this gateway, the Access Network gateway that sends to calls customer end to belong to the called subscriber's who parses media address and port information, so that the Access Network gateway that calls customer end belongs to sends to described calls customer end by the call receiving from IMS network by described called subscriber's media address and port information.

2. the method for claim 1, it is characterized in that, Access Network gateway receives after the call request of calls customer end transmission, also comprise: revise media address and the port information of the calling subscriber in described call request, amended call request is sent to IP multimedia system IMS network;

3. method as claimed in claim 2, is characterized in that, Access Network gateway also comprised amended call request before IMS network sends: amended call request is converted to the call request of Session initiation protocol SIP agreement;

Access Network gateway also comprised before amended call request is sent to called party client end: the agreement adopting according to called party client end, is converted to amended call request the call request of respective protocol;

Access Network gateway was also comprising amended call before IMS network sends: the call that amended call is converted to Session Initiation Protocol;

Access Network gateway sends to amended call before calls customer end and also comprises: the agreement adopting according to calls customer end, is converted to amended call the call of respective protocol.

4. method as claimed in claim 2, it is characterized in that, described amended call request is sent to IMS network, specifically comprise: amended call request is sent to boarder controller SBC, the media address of SBC to the calling subscriber in the call request receiving and port information send to IMS network after modifying;

Described Access Network gateway is from the request of IMS network receipt of call, specifically comprise: described Access Network gateway is from the request of SBC receipt of call, described call request is that described SBC is receiving call request from IMS network, revises and is transmitted to described Access Network gateway after calling subscriber's wherein media address and port information;

Described amended call is sent to IMS network, specifically comprise: amended call is sent to SBC, and the media address of SBC to the called subscriber in the call receiving and port information send to IMS network after modifying;

Described Access Network gateway responds from IMS network receipt of call, specifically comprise: described Access Network gateway responds from SBC receipt of call, described call is that described SBC is receiving call from IMS network, revises and is transmitted to described Access Network gateway after called subscriber's wherein media address and port information.

5. the method for claim 1, is characterized in that, the described Access Network gateway that sends to called party client end to belong to the calling subscriber's who parses media address and port information, specifically comprises:

The Access Network gateway that sends to called party client end to belong to by IP protocol message the calling subscriber's who parses media address and port information;

The described Access Network gateway that sends to calls customer end to belong to the called subscriber's who parses media address and port information, specifically comprises:

The Access Network gateway that sends to calls customer end to belong to by IP protocol message the called subscriber's who parses media address and port information.

6. an Access Network gateway device, is characterized in that, comprising:

User information exchange module, for belong to for calls customer end at this equipment Access Network gateway time, the media address of calls customer end and port information are sent to the Access Network gateway of called party client end ownership, receive media address and the port information of the called party client end that the Access Network gateway of called party client end ownership sends; Belong to for called party client end at this equipment Access Network gateway time, receive media address and the port information of the calls customer end that the Access Network gateway of calls customer end ownership sends, the media address of called party client end and port information are sent to the Access Network gateway of called party client end ownership.

7. Access Network gateway device as claimed in claim 6, it is characterized in that, described call request processing module also for: revise the calling subscriber's of described call request media address and port information, amended call request sent to IP multimedia system IMS network;

Described call processing module also for: revise called subscriber's media address and the port information of call, and amended call sent to IMS network;

8. Access Network gateway device as claimed in claim 7, it is characterized in that, described call request processing module also for, before amended call request is sent to IMS network, amended call request is converted to the call request of Session initiation protocol SIP agreement, before amended call request is sent to called party client end by described call request processing module, the agreement adopting according to called party client end, is converted to amended call request the call request of respective protocol;

Described call processing module is also for before sending amended call to IMS network, amended call request is converted to the call of Session Initiation Protocol, before amended call is sent to calls customer end by described call processing module, the agreement adopting according to calls customer end, is converted to amended call the call of respective protocol.

9. Access Network gateway device as claimed in claim 6, it is characterized in that, described user information exchange module specifically for, the Access Network gateway that sends to called party client end to belong to by IP protocol message the media address of calls customer end and port information, the Access Network gateway that sends to calls customer end to belong to by IP protocol message called subscriber's media address and port information.

10. a service call method, is characterized in that, is provided with agent equipment in Access Network, and described method comprises:

Agent equipment receives call from IMS network, by the media address of the called subscriber in described call and port information, be revised as the called subscriber's that this equipment preserves media address and port information, and the Access Network gateway that sends to calls customer end to belong to amended call, so that this call is transmitted to calls customer end by the Access Network gateway that calls customer end belongs to.

11. service call methods as claimed in claim 10, it is characterized in that, described amended call request is sent to IMS network, specifically comprise: amended call request is sent to boarder controller SBC, the media address of SBC to the calling subscriber in the call request receiving and port information send to IMS network after modifying;

Described agent equipment, from the request of IMS network receipt of call, specifically comprises: described agent equipment is from the request of SBC receipt of call; Wherein, the call request receiving from SBC is that described SBC is receiving call request from IMS network, revises and is transmitted to described agent equipment after calling subscriber's wherein media address and port information;

Described agent equipment, from the response of IMS network receipt of call, specifically comprises: described agent equipment responds from SBC receipt of call; Wherein, the call receiving from SBC is that described SBC is receiving call from IMS network, revises and is transmitted to described agent equipment after called subscriber's wherein media address and port information.

12. 1 kinds of agent equipments, is characterized in that, are applied in Access Network, comprising:

13. 1 kinds of access net systems, is characterized in that, comprise Access Network gateway device, and agent equipment as claimed in claim 12, wherein:

Access Network gateway device, for call request being transmitted to described agent equipment in the time receiving the call request of calls customer end transmission, receiving after the call request of agent equipment transmission, according to the called number carrying in call request, call request is sent to corresponding client, after receiving the call that called party client end returns, call is transmitted to described agent equipment, receiving after the call of agent equipment transmission, according to the calling number of carrying in call, call is sent to corresponding client.