CN102232321B - Bearer establishment method, system and gateway equipment - Google Patents

Bearer establishment method, system and gateway equipment Download PDF

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Publication number
CN102232321B
CN102232321B CN201080005222.2A CN201080005222A CN102232321B CN 102232321 B CN102232321 B CN 102232321B CN 201080005222 A CN201080005222 A CN 201080005222A CN 102232321 B CN102232321 B CN 102232321B
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gateway
switching center
mobile switching
center server
service gateway
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CN102232321A (en
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陆峰
于益俊
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Huawei Technologies Co Ltd
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Huawei Technologies Co Ltd
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L65/00—Network arrangements, protocols or services for supporting real-time applications in data packet communication
    • H04L65/10—Architectures or entities
    • H04L65/102—Gateways
    • H04L65/1033—Signalling gateways
    • H04L65/104—Signalling gateways in the network

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Abstract

A bearer establishment method, system and gateway equipment are provided in the present invention. The bearer establishment method includes that: a gateway equipment receives a modification bearer request message sent by a first Service Gateway (SGW); the gateway equipment sends a modification bearer response message to the first SGW, wherein the modification bearer response message carries an IP address and a Tunnel Endpoint Identifier (TEID) of a Mobile Switch Center Server (MSC Server)/Media Gateway (MGW), so that the first SGW establishes a bearer for IP voice with the MSC Server/MGW. The present invention realizes that a bearer for IP voice can still be established between an MSC Server/MGW and a changed SGW after the SGW has changed, thus ensuring service continuity.

Description

Carrying establishing method, system and gateway device
Technical field
The present invention relates to communication technical field, relate in particular to a kind of carrying establishing method, system and gateway device.
Background technology
At present, a lot of business of operator all operate in GPRS (General Packet Radio Service; Hereinafter to be referred as: GPRS)/universal mobile telecommunications system (Universal Mobile Telecommunications System; Hereinafter to be referred as: circuit switching (Circuit Switched UMTS); Hereinafter to be referred as: CS) in territory, single wireless voice calling continuity (Single Radio Voice Call Continuity; Hereinafter to be referred as: SRVCC) technology is as internet protocol multimedia subsystem (Internet Protocol Multimedia Subsystem; Hereinafter to be referred as: IMS) the voice continuity scheme at initial stage disposed in voice, can be subscriber equipment (User Equipment; Hereinafter to be referred as: UE) provide UMTS Terrestrial radio access network (the Evolved UMTS Territorial Radio Access Network from evolution; Hereinafter to be referred as: E-UTRAN) to UMTS Terrestrial radio access network (UMTSTerritorial Radio Access Network; Hereinafter to be referred as: UTRAN)/global system for mobile communications enhanced data rates for gsm evolution wireless access network (Global System for Mobile Communications Enhanced Data Rate for GSM Evolution Radio Access Network; Hereinafter to be referred as: seamless switching GERAN), has obtained the lasting concern of operator.For this reason, third generation partner program (The 3rd Generation Partnership Project; Hereinafter to be referred as: 3GPP) carry out the research of SRVCC performance enhancing project, be intended to improve the performance of handoffs of SRVCC, avoided appearance in handoff procedure to interrupt the excessive scene of time delay as far as possible.
Wherein, using the SRVCC enhanced scheme of local grappling is one of main scheme of recommending in existing SRVCC enhanced scheme.In the SRVCC enhanced scheme of the local grappling of use, the exchange of UE executive circuit falls (CS Fallback after rise; Hereinafter to be referred as: CSFB) combine and adhere to, and by Mobile Switching Center Server (Mobile Switch Center Server; Hereinafter to be referred as: MSC Server)/media gateway (Media Gateway; Hereinafter to be referred as: MGW) be registered to IMS, and in SRVCC handoff procedure and service set and continuous application server (Service Centralization and Continuity Application Server; Hereinafter to be referred as: SCCAS) set up session initiation protocol (Session Initiated Protocol; Hereinafter to be referred as: SIP) session, MSCServer/MGW and gateway (Service Gateway after SRVCC switches; Hereinafter to be referred as: SGW) set up for ip voice (Voice over Internet Protocol; Hereinafter to be referred as: carrying VoIP), transmit the ip voice of up-downgoing, for example: IMS speech data.
Wherein, carrying out SRVCC for UE at E-UTRAN is switched to the scene (being call flow without PS HO Support or SRVCCHandover without PS HO support) of the GERAN/UTRAN that does not support that grouping switches and carries out SRVCC for UE at E-UTRAN and be switched to the scene (being call flow without PS HO Support or SRVCC Handover with PS HO support) of GERAN/UTRAN of supporting that grouping is switched, in the SRVCC enhanced scheme of the local grappling of existing use, once SGW changes, existing scheme cannot be set up carrying between the new SGW at MSCServer/MGW and after changing, the ip voice of the up-downgoing that cannot transmit this UE will be caused like this, cause service disconnection.
Summary of the invention
The embodiment of the present invention provides a kind of carrying establishing method, system and gateway device, to realize after gateway changes, between the new gateway in Mobile Switching Center Server/media gateway and after changing, set up the carrying for ip voice.
The embodiment of the present invention provides a kind of carrying establishing method, comprising:
Gateway device receives the modification bearing request message that first service gateway sends;
Described gateway device sends and revises bearing response message to described first service gateway, in described modification bearing response message, carry IP address and the Tunnel End Point Identifier of Mobile Switching Center Server/media gateway, so that described first service gateway and described Mobile Switching Center Server/media gateway is set up the carrying for ip voice.
The embodiment of the present invention also provides a kind of gateway device, comprising:
Receiver module, the modification bearing request message sending for receiving first service gateway;
Sending module, for sending and revise bearing response message to described first service gateway, carries IP address and the Tunnel End Point Identifier of Mobile Switching Center Server/media gateway in described modification bearing response message; So that described first service gateway and described Mobile Switching Center Server/media gateway is set up the carrying for ip voice.
The embodiment of the present invention also provides a kind of carrying to set up system, comprising: gateway device, first service gateway and Mobile Switching Center Server/media gateway;
Described gateway device, the modification bearing request message sending for receiving described first service gateway, send and revise bearing response message to described first service gateway, in described modification bearing response message, carry IP address and the Tunnel End Point Identifier of Mobile Switching Center Server/media gateway;
Described first service gateway, for setting up the carrying for ip voice with described Mobile Switching Center Server/media gateway.
Pass through the embodiment of the present invention, after gateway device receives the modification bearing request message of first service gateway transmission, the IP address of Mobile Switching Center Server/media gateway and Tunnel End Point Identifier are sent to first service gateway by revising bearing response message; Like this, after receiving modification bearing response message, first service gateway just can be set up the carrying for ip voice with Mobile Switching Center Server/media gateway.Thereby realize after gateway changes, still can between the new gateway in Mobile Switching Center Server/media gateway and after changing, set up the carrying for ip voice, guaranteed the continuity of business.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, to the accompanying drawing of required use in embodiment or description of the Prior Art be briefly described below, apparently, accompanying drawing in the following describes is some embodiments of the present invention, for those of ordinary skills, do not paying under the prerequisite of creative work, can also obtain according to these accompanying drawings other accompanying drawing.
Fig. 1 is the flow chart of an embodiment of carrying establishing method of the present invention;
Fig. 2 is the flow chart of another embodiment of carrying establishing method of the present invention;
Fig. 3 is the flow chart of another embodiment of carrying establishing method of the present invention;
Fig. 4 is the structural representation of an embodiment of gateway device of the present invention;
Fig. 5 is the structural representation of another embodiment of gateway device of the present invention;
Fig. 6 is the structural representation that an embodiment of the system of foundation is carried in the present invention.
Embodiment
For making object, technical scheme and the advantage of the embodiment of the present invention clearer, below in conjunction with the accompanying drawing in the embodiment of the present invention, technical scheme in the embodiment of the present invention is clearly and completely described, obviously, described embodiment is the present invention's part embodiment, rather than whole embodiment.Based on the embodiment in the present invention, the every other embodiment that those of ordinary skills obtain under the prerequisite of not making creative work, belongs to the scope of protection of the invention.
In order to set up the carrying for ip voice between Mobile Switching Center Server/media gateway and gateway, Mobile Switching Center Server/media gateway and gateway need to be known mutually Internet Protocol (the Internet Protocol of opposite end; Hereinafter to be referred as: IP) address and Tunnel End Point Identifier.
In the SRVCC enhanced scheme of the local grappling of existing use, IP address and the Tunnel End Point Identifier for the carrying of ip voice on gateway sent to Mobile Switching Center Server/media gateway by mobile management net element, and Mobile Switching Center Server/media gateway and above-mentioned gateway are set up the carrying for ip voice.In the time that gateway does not change, the carrying for ip voice of above-mentioned foundation is working properly.
But, carrying out SRVCC for UE at E-UTRAN is switched to the scene (being call flow without PS HO Support or SRVCCHandover without PS HO support) of the GERAN/UTRAN that does not support that grouping switches and carries out SRVCC for UE at E-UTRAN and be switched to the scene (being call flow without PS HO Support or SRVCC Handover with PS HO support) of GERAN/UTRAN of supporting that grouping is switched, in the SRVCC enhanced scheme of the local grappling of existing use, once gateway changes, existing scheme cannot be set up carrying between the new gateway in Mobile Switching Center Server/media gateway and after changing, the ip voice of the up-downgoing that cannot transmit this UE will be caused like this, cause service disconnection.
The embodiment of the present invention proposes a kind of carrying establishing method, after gateway gets the IP address and Tunnel End Point Identifier of Mobile Switching Center Server/media gateway, above-mentioned IP address and Tunnel End Point Identifier are offered to gateway device, after gateway changes, the IP address of above-mentioned Mobile Switching Center Server/media gateway and Tunnel End Point Identifier are sent to new gateway by above-mentioned gateway device, so that new gateway and Mobile Switching Center Server/media gateway is set up the carrying for ip voice.
For ease of describing, in the embodiment of the present invention, the new gateway after gateway is changed is called " first service gateway ", and the gateway before gateway is changed is called " second service gateway ".In the embodiment of the present invention, " first " and " second " only for convenience of description, do not represent the priority of embodiment and the quality of performance, lower same.
Fig. 1 is the flow chart of an embodiment of carrying establishing method of the present invention, and as shown in Figure 1, this carrying establishing method can comprise:
Step 101, gateway device receives the modification bearing request message that first service gateway sends.
In the present embodiment, before gateway device receives the modification bearing request message of first service gateway (the new gateway after changing) transmission, this gateway device also will be known IP address and Tunnel End Point Identifier (the Tunnel Endpoint Identifier of Mobile Switching Center Server/media gateway; Hereinafter to be referred as: TEID), for ip voice (Voice over Internet Protocol; Hereinafter to be referred as: IP address and the TEID of carrying VoIP).Particularly, this gateway device can receive the modification bearing request message that second service gateway (gateway before changing) sends, and carries IP address and the TEID of above-mentioned Mobile Switching Center Server/media gateway in the modification bearing request message that this second service gateway sends.
In addition, in the modification bearing request message that above-mentioned second service gateway sends, can also carry and upgrade voice bearer indication, so that carry IP address and the Tunnel End Point Identifier of above-mentioned Mobile Switching Center Server/media gateway in the modification bearing response message that gateway device sends to first service gateway, the present embodiment is not restricted the concrete title of this indication.In the present embodiment, gateway device can be ggsn (Gateway General Packet Radio Service Support Node; Hereinafter to be referred as: GGSN)/grouped data network gateway (Packet Data NetworkGateway; Hereinafter to be referred as: PGW); Mobile Switching Center Server/media gateway can be MSC server (MSC Server)/MGW.
Step 102, gateway device sends and revises bearing response message to first service gateway, in this modification bearing response message, carry IP address and the TEID of Mobile Switching Center Server/media gateway, so that first service gateway and Mobile Switching Center Server/media gateway is set up the carrying for ip voice.
In addition, in the modification bearing response message that above-mentioned gateway device sends to first service gateway, can also carry and upgrade voice bearer indication, so that first service gateway and Mobile Switching Center Server/media gateway is set up the carrying for ip voice, the present embodiment is not restricted the concrete title of this indication.
In the present embodiment, after receiving modification bearing response message, first service gateway can be set up the carrying for ip voice with Mobile Switching Center Server/media gateway.Be specifically as follows:
(1) first service gateway can be according to IP address and the TEID of above-mentioned Mobile Switching Center Server/media gateway, send update request message (for example: upgrade bearing request message) to Mobile Switching Center Server/media gateway, this update request message is carried IP address and the TEID of first service gateway, for transmitting IP address and the TEID of ip voice; Mobile Switching Center Server/media gateway is according to IP address and the TEID of the first service gateway comprising in the update request message receiving, upgrade the context for the carrying of ip voice, send corresponding renewal response message (for example: upgrade bearing response message) to first service gateway; So far successfully set up the carrying for ip voice between first service gateway and Mobile Switching Center Server/media gateway.Or,
(2) first service gateway can be according to IP address and the TEID of above-mentioned Mobile Switching Center Server/media gateway, send update notification message to Mobile Switching Center Server/media gateway, this update notification message is carried IP address and the TEID of first service gateway, for transmitting IP address and the TEID of ip voice; Mobile Switching Center Server/media gateway is according to IP address and the TEID of the first service gateway comprising in the update notification message receiving, after upgrading the context of the carrying that is used for ip voice, send update request message (for example: revise bearing request message) to first service gateway, this update request message is carried IP address and the TEID of Mobile Switching Center Server/media gateway; First service gateway sends corresponding renewal response message (for example: revise bearing response message) to Mobile Switching Center Server/media gateway; So far successfully set up the carrying for ip voice between first service gateway and Mobile Switching Center Server/media gateway.
In above-described embodiment, gateway device is after knowing the IP address and TEID of Mobile Switching Center Server/media gateway, under the scene changing at gateway, to carry the IP address of Mobile Switching Center Server/media gateway and the message of TEID sends to first service gateway, make first service gateway and Mobile Switching Center Server/media gateway set up the carrying for ip voice, guaranteed the continuity of business.
Fig. 2 is the flow chart of another embodiment of carrying establishing method of the present invention, the present embodiment is switched to the scene of the GERAN/UTRAN that does not support grouping switching at E-UTRAN execution SRVCC for UE, in switching, only carries out SRVCC the switching of PS territory to CS territory, and do not carry out PS territory switch situation, in this scene, after UE is switched to GERAN/UTRAN, need by carrying out Routing Area Update (Routing Area Update; Hereinafter to be referred as: RAU) flow process completes PS context transfer.
As shown in Figure 2, this carrying establishing method can comprise:
Step 201, source radio network controller (Radio Network Controller; Hereinafter to be referred as: RNC)/evolution base station (evolved NodeB; Hereinafter to be referred as: while eNodeB) detecting that needs initiate to switch, to source service universal grouping wireless business supporting node (Serving General Packet Radio Service Support Node; Hereinafter to be referred as: SGSN)/mobile management net element (Mobile Management Entity; Hereinafter to be referred as: MME) send handover request (Relocation Request/Handover Request) message.
Step 202, source SGSN/MME sends handover request (SRVCC PS to CS Request)/forwarding re-positioning request (the Forward Relocation Request) message of PS territory to CS territory to MSC server (MSC Server)/MGW.
Step 203, MSC server/MGW and target side base station controller (Base StationController; Hereinafter to be referred as: BSC)/RNC carries out handover resource allocation flow process, comprise that MSC server/MGW sends handover request (Relocation Request/Handover Request) message to target side BSC/RNC, target side BSC/RNC sends Handover Request Acknowledge (Relocation Request Acknowledge/Handover Request Acknowledge) message to MSC server/MGW.
Step 204, MSC server/MGW sends and creates session request (Create Session Request) or create indirect data forwarding tunnel request (Create Indirect Data Forwarding Tunnel Request) message to source SGW.This establishment session request or create the IP address and the TEID that carry MSC server/MGW in indirect data forwarding tunnel request message, for IP address and the TEID of the carrying of ip voice, and the TEID that forwards for indirect data of MSC server/MGW.
Wherein, for example, can be quality of service type mark (Quality of Service Class Identifier for the carrying of ip voice (IMS speech data); Hereinafter to be referred as: the carrying that value QCI) is 1.
Step 205, source SGW sends and revises carrying request (Modify Bearer Request) message to GGSN/PGW, carries IP address and the TEID of MSC server/MGW in this modification bearing request message.
Alternatively, in this modification bearing request message, can also carry and upgrade voice bearer indication, this renewal voice bearer indication can indicate GGSN/PGW that the IP address of MSC server/MGW and TEID are notified to the new SGW after changing, and the present embodiment is not restricted the concrete title of this indication.
Step 206, GGSN/PGW sends and revises carrying response (Modify Bearer Response) message to source SGW.
After receiving the modification bearer messages of step 205, GGSN/PGW records IP address and the TEID of MSC server/MGW; In the time also carrying the indication of renewal voice bearer in above-mentioned modification carrying request, this GGSN/PGW can also record this renewal voice bearer indication.
Step 207, source SGW sends and creates conversational response (Create Session Response) or create indirect data forwarding tunnel response (Create Indirect Data Forwarding Tunnel Response) message to MSC server/MGW.
Step 208, MSC server/MGW sends to source SGSN/MME response (SRVCC PS to CS Response)/forwarding relocation response (Forward Relocation Response) message that switch to CS territory in PS territory.
Step 209, source SGSN/MME sends switching command (Handover Command) message to source RNC/eNodeB.
Step 210, source RNC/eNodeB sends switching command (Handover Command) message to UE.
Step 211, UE is switched to GERAN/UTRAN, initiates RAU flow process, sends Routing Area Update request (Routing Area Update Request to target side SGSN; Hereinafter to be referred as: RAU Request) message.
Step 212, target side SGSN has selected new target side SGW, sends and creates session request (Create Session Request) message, to set up all carryings on interior source SGW that are carried on that comprise for ip voice to this target side SGW.
Step 213, target side SGW sends and revises carrying request (Modify Bearer Request) message to GGSN/PGW.
Step 214, GGSN/PGW sends and revises carrying response (Modify Bearer Response) message to target side SGW.
Particularly, GGSN/PGW can be according to IP address and the TEID of the renewal voice bearer indication of record or MSC server/MGW, and the IP address of the MSC server/MGW of record and TEID are carried in above-mentioned modification bearing response message and send to target side SGW.
Alternatively, GGSN/PGW can also carry and upgrade voice bearer indication in above-mentioned modification bearing response message, the indication of this renewal voice bearer can indicating target side SGW according to IP address and the TEID of MSC server/MGW, set up the carrying for ip voice between MSC server/MGW, or, this renewal voice bearer indication can be set up the carrying for ip voice between target side SGW and MSC server/MGW by indicating target side SGW notice MSC server/MGW, and the present embodiment does not limit the concrete title of this indication.
Step 215, target side SGW sends and creates conversational response (Create Session Response) message to target side SGSN.
Following steps 216 (comprising step 216a and step 216b) or step 217 (comprising step 217a, step 217b and step 217c) have realized respectively renewal or have set up the idiographic flow of the carrying for ip voice between target side SGW and MSC server/MGW, the present embodiment can select step 216 or step 217 to realize, and the present embodiment is not restricted this.Wherein, step 216 or step 217 and step 215 do not have precedence relationship, can executed in parallel.
Step 216, sets up the carrying for ip voice between target side SGW and MSC server/MGW.
Specifically comprise:
Step 216a, target side SGW is according to the IP address and the TEID that revise the MSC server/MGW carrying in bearing response message, send update request message to this MSC server/MGW, in this update request message, carry IP address and the TEID of target side SGW for ip voice.
Wherein, this update request message can be existing more new bearer request (Update Bearer Request) message or revise carrying request (Modify Bearer Request) message, an or new message, for example: upgrade ip voice bearing request message, the present embodiment is not restricted this.
Alternatively, in above-mentioned update request message, can also carry and upgrade voice bearer indication, the indication of this renewal voice bearer can instruct MS C server/MGW according to above-mentioned target side SGW IP address and the TEID for ip voice, set up the carrying for ip voice between above-mentioned target side SGW.
Step 216b, MSC server/MGW upgrades the context for the carrying of ip voice according to target side SGW for IP address and the TEID of ip voice, sends and upgrades response message to target side SGW.
Wherein, this renewal response message can be existing more new bearer response (Update Bearer Response) message or revise carrying response (Modify Bearer Response) message, an or new message, for example upgrade ip voice bearing response message, the present embodiment is not restricted this.
Step 217, sets up the carrying for ip voice between target side SGW and MSC server/MGW.
Specifically comprise:
Step 217a, target side SGW is according to the IP address and the TEID that revise the MSC server/MGW carrying in bearing response message, send update notification message to this MSC server/MGW, in this update notification message, carry IP address and the TEID of target side SGW for ip voice.
In the present embodiment, this update notification message instruct MS C server/MGW upgrades or sets up the carrying for ip voice between target side SGW and MSC server/MGW.
Wherein, this update notification message can be modification carrying order (Modify Bearer Command) message of expansion, or a new message, for example, upgrade ip voice carrying notification message, and the present embodiment is not restricted this.
Alternatively, in above-mentioned update notification message, can also carry and upgrade voice bearer indication, the indication of this renewal voice bearer can instruct MS C server/MGW according to above-mentioned target side SGW IP address and the TEID for ip voice, set up the carrying for ip voice between above-mentioned target side SGW.
Step 217b, MSC server/MGW is IP address and the TEID for ip voice according to the target side SGW obtaining in step 217a, sends more new bearer request (Update Bearer Request) message or modification carrying request (Modify Bearer Request) message to target side SGW.
Wherein, this renewal bearing request message or revise bearing request message and can carry IP address and the TEID of MSC server/MGW, for transmitting IP address and the TEID of carrying of ip voice.
Step 217c, target side SGW sends more new bearer response (Update Bearer Response) message or modification carrying response (Modify Bearer Response) message to MSC server/MGW.
Particularly, after target side SGW receives the renewal bearing request message of step 217b transmission or revises bearing request message, upgrade the context for the carrying of ip voice, send corresponding renewal bearing response message or revise bearing response message to MSC server/MGW.
Step 218, target side SGSN sends Routing Area Update response (Routing Area Update Response to UE; Hereinafter to be referred as: RAU Response) message.
In above-described embodiment, GGSN/PGW is by after knowing the IP address and TEID of MSC server/MGW, under the scene changing at SGW, send to the target side SGW after changing by carrying the IP address of MSC server/MGW and the message of TEID, make this target side SGW to set up the carrying for ip voice with MSC server/MGW, guaranteed the continuity of business.
Fig. 3 is the flow chart of another embodiment of carrying establishing method of the present invention, the present embodiment is switched to the scene of the GERAN/UTRAN that does not support grouping switching at E-UTRAN execution SRVCC for UE, in SRVCC switches, can carry out PS territory switches to CS territory and PS territory to PS territory simultaneously, now can the IP address of MSC server/MGW and TEID be transmitted to target side SGW by target side SGSN in the switching flow of PS territory, for setting up the carrying for ip voice between MSC server/MGW and target side SGW.After UE is switched to target side GERAN/UTRAN, along with the movement of UE, also may there is new PS territory and switch, cause SGW to change, need in the case to re-establish the carrying for ip voice between target side SGW and MSC server/MGW.
As shown in Figure 3, this carrying establishing method can comprise:
Step 301, source RNC/eNodeB detects while needing to initiate to switch, sends handover request (Relocation Request/Handover Request) message to source SGSN/MME.
Step 302, source SGSN/MME sends PS territory to CS territory handover request (SRVCC PS to CS Request)/forwarding re-positioning request (Forward Relocation Request) message to MSC server/MGW.
Step 303, MSC server/MGW and target side BSC/RNC carry out handover resource allocation flow process, comprise that MSC server/MGW sends handover request (Relocation Request/Handover Request) message to target side BSC/RNC, target side BSC/RNC sends Handover Request Acknowledge (Relocation Request Acknowledge/Handover Request Acknowledge) message to MSC server/MGW.
Step 304, MSC server/MGW sends PS territory to the handoff response (SRVCC PS to CS Response) in CS territory or forwards relocation response (Forward Relocation Response) message to source SGSN/MME.This PS territory is to the IP address and the TEID that carry MSC server/MGW in the switching response message in CS territory.
Step 305, source SGSN/MME sends and forwards re-positioning request (Forward Relocation Request) message to target side SGSN 1.In this forwarding RELOCATION REQUEST message, carry IP address and the TEID of MSC server/MGW, and MSC server/MGW is for the TEID of indirect data forwarding.
Step 306, target side SGSN 1 and target side BSC/RNC carry out handover resource allocation flow process, comprise that target side SGSN 1 sends handover request (Relocation Request/Handover Request) message to target side BSC/RNC, target side BSC/RNC sends Handover Request Acknowledge (Relocation Request Acknowledge/Handover Request Acknowledge) message to target side SGSN 1.
Step 307, target side SGSN 1 sends and creates session request (Create Session Request) message/establishment indirect data forwarding tunnel request (Create Indirect Data Forwarding Tunnel Request) message to this target side SGW 1, carries IP address and the TEID of MSC server/MGW in this establishment session request/establishment indirect data forwarding tunnel request message.
Step 308, target side SGW 1 sends and revises carrying request (Modify Bearer Request) message to GGSN/PGW, carries IP address and the TEID of MSC server/MGW in this modification bearing request message.
Alternatively, in this modification bearing request message, can also carry and upgrade voice bearer indication, this renewal voice bearer indication can indicate GGSN/PGW that the IP address of MSC server/MGW and TEID are notified to the new SGW after changing, and the present embodiment is not restricted the concrete title of this indication.
Step 309, GGSN/PGW sends and revises carrying response (Modify Bearer Response) message to target side SGW 1.
After receiving the modification bearing request message of step 308, GGSN/PGW records IP address and the TEID of MSC server/MGW; In the time also carrying the indication of renewal voice bearer in above-mentioned modification carrying request, this GGSN/PGW can also record this renewal voice bearer indication.
Step 310, target side SGW 1 sends and creates conversational response (Create Session Response) message/establishment indirect data forwarding tunnel response (Create Indirect Data Forwarding Tunnel Response) message to target side SGSN 1.
Step 311, target side SGSN 1 sends and forwards relocation response (Forward Relocation Response) message to source SGSN/MME.
Step 312, the SGSN/MME of source sends PS territory to MSC server/MGW and confirms (SRVCC PS to CS Acknowledge) message to the switching in CS territory, and this PS territory is to the IP address and the TEID that carry target side SGW 1 in the switch acknowledgment message in CS territory.MSC server/MGW upgrades this IP address and TEID, the carrying for ip voice between foundation or renewal MSC server/MGW and target side SGW 1.
Step 313, MSC server/MGW sends PS territory to source SGSN/MME and confirms response (SRVCC PS to CS Acknowledge Response) message to the switching in CS territory.
Step 314, source SGSN/MME sends switching command (Handover Command) message to source RNC/eNodeB.
Step 315, source RNC/eNodeB sends switching command (Handover Command) message to UE.
Step 316, UE is switched to GERAN/UTRAN, carries out follow-up switching flow.
After UE is switched to object GERAN/UTRAN, proceed speech business, along with the movement of UE, new PS territory may occur switches, cause changing SGW, new SGW after now changing is target side SGW 2, now carries out following steps and recovers the carrying for ip voice between MSC server/MGW and target side SGW 2.
Step 317, target side BSC/RNC detects while needing to initiate to switch, sends handover request (Relocation Request/Handover Request) message to target side SGSN 1.
Step 318, target side SGSN 1 sends and forwards re-positioning request (Forward Relocation Request) message to target side SGSN 2.
Step 319, target side SGSN 2 has selected new target side SGW 2, sends and creates session request (Create Session Request) message to this target side SGW 2.
Step 320, target side SGW 2 sends and revises carrying request (Modify Bearer Request) message to GGSN/PGW.
Step 321, GGSN/PGW sends and revises carrying response (Modify Bearer Response) message to target side SGW 2.
Wherein, GGSN/PGW can be according to IP address and the TEID of the renewal voice bearer indication of record or MSC server/MGW, and the IP address of the MSC server/MGW of record and TEID are carried in above-mentioned modification bearing response message and send to target side SGW 2.
Alternatively, GGSN/PGW can also carry and upgrade voice bearer indication in above-mentioned modification bearing response message, this renewal voice bearer indication can be set up the carrying for ip voice between MSC server/MGW according to the IP address of MSC server/MGW and TEID by indicating target side SGW 2, or, this renewal voice bearer indication can notify MSC server/MGW to set up the carrying for ip voice between target side SGW 2 and MSC server/MGW by indicating target side SGW 2, and the present embodiment is not restricted the concrete title of this indication.
Step 322, target side SGW 2 sends and creates conversational response (Create Session Response) message to target side SGSN 2.
Following steps 323 (comprising step 323a and step 323b) or step 324 (comprising step 324a, step 324b and step 324c) have realized respectively renewal or have set up the idiographic flow of the carrying for ip voice between target side SGW 2 and MSC server/MGW, the present embodiment can select step 323 or step 324 to realize, and the present embodiment is not restricted this.Wherein, step 323 or step 324 and step 322 do not have precedence relationship, can executed in parallel.
Step 323, sets up the carrying for ip voice between target side SGW 2 and MSC server/MGW.
Specifically comprise:
Step 323a, target side SGW 2 is according to the IP address and the TEID that revise the MSC server/MGW carrying in bearing response message, send update request message to this MSC server/MGW, in this update request message, carry IP address and the TEID of target side SGW 2 for ip voice.
Wherein, this update request message can be existing more new bearer request (Update Bearer Request) message or revise carrying request (Modify Bearer Request) message, an or new message, for example upgrade ip voice bearing request message, the present embodiment is not restricted this.
Alternatively, in above-mentioned update request message, can also carry and upgrade voice bearer indication, the indication of this renewal voice bearer can instruct MS C server/MGW according to above-mentioned target side SGW 2 IP address and the TEID for ip voice, set up the carrying for ip voice between above-mentioned target side SGW 2.
Step 323b, MSC server/MGW upgrades for IP address and the TEID of ip voice the context that is used for the carrying of transmitting ip voice according to target side SGW 2, sends and upgrades response messages to target side SGW 2.
Wherein, this renewal response message can be existing more new bearer response (Update Bearer Response) message or revise carrying response (Modify Bearer Response) message, an or new message, for example: upgrade ip voice bearing response message, the present embodiment is not restricted this.
Step 324, sets up the carrying for ip voice between target side SGW 2 and MSC server/MGW.
Specifically comprise:
Step 324a, target side SGW 2 is according to the IP address and the TEID that revise the MSC server/MGW carrying in bearing response message, send update notification message to this MSC server/MGW, in this update notification message, carry IP address and the TEID of target side SGW 2 for ip voice.
This update notification message instruct MS C server/MGW upgrades or sets up the carrying for ip voice between target side SGW 2 and this MSC server/MGW.
Wherein, this update notification message can be modification carrying order (Modify Bearer Command) message of expansion, or a new message, for example, upgrade ip voice carrying notification message, and the present embodiment is not restricted this.
Alternatively, in above-mentioned update notification message, can also carry and upgrade voice bearer indication, the indication of this renewal voice bearer can instruct MS C server/MGW according to above-mentioned target side SGW 2 IP address and the TEID for ip voice, set up the carrying for ip voice between above-mentioned target side SGW 2.
Step 324b, MSC server/MGW is IP address and the TEID for ip voice according to the target side SGW 2 obtaining in step 324a, sends more new bearer request (Update Bearer Request) message or modification carrying request (Modify Bearer Request) message to target side SGW 2.
This renewal bearing request message or revise IP address and the TEID that can carry MSC server/MGW in bearing request message, for transmitting IP address and the TEID of carrying of ip voice.
Step 324c, target side SGW 2 sends more new bearer response (Update Bearer Response) message or modification carrying response (Modify Bearer Response) message to MSC server/MGW.
Particularly, after target side SGW 2 receives the renewal bearing request message of step 324b transmission or revises bearing request message, upgrade the context of the carrying for transmitting ip voice, send corresponding renewal bearing response message or revise bearing response message to MSC server/MGW.
Step 325, target side SGSN 2 sends and forwards relocation response (Forward Relocation Response) message to target side SGSN 1.
Step 326, target side SGSN 1 sends switching command (Handover Command) message to target side BSC/RNC.
Step 327, target side BSC/RNC sends switching command (Handover Command) message to UE.
Step 328, UE carries out follow-up switching flow.
In above-described embodiment, GGSN/PGW is by after knowing the IP address and TEID of MSC server/MGW, under the scene changing at SGW, send to the target side SGW after changing by carrying the IP address of MSC server/MGW and the message of TEID, make this target side SGW to set up the carrying for ip voice with MSC server/MGW, guaranteed the continuity of business.
Fig. 2 of the present invention and embodiment illustrated in fig. 3 be only the application of the carrying establishing method that proposes of the present invention in two kinds of concrete handoff scenario, do not form limitation of the invention, the carrying establishing method that the present invention proposes can also be applied in other handoff scenario.
One of ordinary skill in the art will appreciate that: all or part of step that realizes said method embodiment can complete by the relevant hardware of program command, aforesaid program can be stored in a computer read/write memory medium, this program, in the time carrying out, is carried out the step that comprises said method embodiment; And aforesaid storage medium comprises: various media that can be program code stored such as ROM, RAM, magnetic disc or CDs.
Fig. 4 is the structural representation of an embodiment of gateway device of the present invention, and the gateway device in the present embodiment can be realized the present invention's flow process embodiment illustrated in fig. 1, and as shown in Figure 4, this gateway device can comprise: receiver module 41 and sending module 42.
Wherein, receiver module 41, the modification bearing request message sending for receiving first service gateway;
Sending module 42, for sending and revise bearing response message to first service gateway, carries IP address and the TEID of Mobile Switching Center Server/media gateway in this modification bearing response message; So that first service gateway and Mobile Switching Center Server/media gateway is set up the carrying for ip voice.
In the present embodiment, gateway device can be GGSN/PGW; Mobile Switching Center Server/media gateway can be MSC server/MGW.
In above-mentioned gateway device, after receiver module 41 receives the modification bearing request message of first service gateway transmission, sending module 42 sends to first service gateway by the IP address of Mobile Switching Center Server/media gateway and TEID by revising bearing response message, like this, after receiving modification bearing response message, first service gateway just can be set up the carrying for ip voice at this first service gateway and Mobile Switching Center Server/media gateway.Thereby realize after gateway changes, still can between the gateway in Mobile Switching Center Server/media gateway and after changing, set up the carrying for ip voice, guaranteed the continuity of business.
Fig. 5 is the structural representation of another embodiment of gateway device of the present invention, and compared with the gateway device shown in Fig. 4, difference is, the gateway device shown in Fig. 5 can also comprise: message sink module 43.
Wherein, message sink module 43, the modification bearing request message sending for receiving second service gateway, carries IP address and the TEID of Mobile Switching Center Server/media gateway in the modification bearing request message that this second service gateway sends;
In the present embodiment, in the second modification bearing request message that message sink module 43 receives, can also carry and upgrade voice bearer indication, so that carry IP address and the Tunnel End Point Identifier of above-mentioned Mobile Switching Center Server/media gateway in the modification bearing response message that gateway device sends to first service gateway, the present embodiment is not restricted the concrete title of this indication.
In addition, in the present embodiment, in the modification bearing response message that sending module 42 sends to first service gateway, can also carry and upgrade voice bearer indication, so that first service gateway and Mobile Switching Center Server/media gateway is set up the carrying for ip voice, the present embodiment is not restricted the concrete title of this indication.
Above-described embodiment has been realized after gateway changes by this gateway device, still can between the gateway in Mobile Switching Center Server/media gateway and after changing, set up the carrying for ip voice, has guaranteed the continuity of business.
Fig. 6 is the structural representation that an embodiment of the system of foundation is carried in the present invention, and as shown in Figure 6, this carrying is set up system and can be comprised: gateway device 61, first service gateway 62 and Mobile Switching Center Server/media gateway 63;
Wherein, gateway device 61, for receiving the modification bearing request message that first service gateway 62 sends, send and revise bearing response message to this first service gateway 62, in this modification bearing response message, carry IP address and the TEID of Mobile Switching Center Server/media gateway 63; Particularly, gateway device 61 can be realized by the gateway device shown in Fig. 4 of the present invention or Fig. 5;
First service gateway 62, for and Mobile Switching Center Server/media gateway 63 between set up for the carrying of ip voice.Particularly, first service gateway 62 can send update request message to Mobile Switching Center Server/media gateway 63, and this update request message is carried IP address and the TEID of first service gateway 62; And receive the renewal response message that Mobile Switching Center Server/media gateway 63 sends; Or first service gateway 62 can send update notification message to Mobile Switching Center Server/media gateway 63, this update notification message is carried IP address and the TEID of first service gateway 62; Receive the update request message that Mobile Switching Center Server/media gateway 63 sends, and send and upgrade response message to Mobile Switching Center Server/media gateway 63.
In the present embodiment, gateway device 61 can be GGSN/PGW; Mobile Switching Center Server/media gateway 63 can be MSC server/MGW.Gateway device 61, first service gateway 62 and Mobile Switching Center Server/media gateway 63 can be carried out according to the flow process shown in Fig. 2 of the present invention or Fig. 3 alternately.
In above-described embodiment, after gateway device 61 receives the modification bearing request message that first service gateway 62 sends, the IP address of Mobile Switching Center Server/media gateway 63 and TEID are sent to first service gateway 62 by revising bearing response message; Like this, receive and revise after bearing response message, first service gateway 62 just can and Mobile Switching Center Server/media gateway 63 between set up the carrying that is used for ip voice.Thereby realize after gateway changes, still can between the gateway in Mobile Switching Center Server/media gateway and after changing, set up the carrying for ip voice, guaranteed the continuity of business.
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.
Finally it should be noted that: above embodiment only, in order to technical scheme of the present invention to be described, is not intended to limit; Although the present invention is had been described in detail with reference to previous embodiment, those of ordinary skill in the art is to be understood that: its technical scheme that still can record aforementioned each embodiment is modified, or part technical characterictic is wherein equal to replacement; And these modifications or replacement do not make the essence of appropriate technical solution depart from the spirit and scope of various embodiments of the present invention technical scheme.

Claims (10)

1. a carrying establishing method, is characterized in that, comprising:
Gateway device receives the modification bearing request message that second service gateway sends; in described modification bearing request message, carry IP address and the Tunnel End Point Identifier of Mobile Switching Center Server/media gateway, described second service gateway is the gateway before gateway changes;
Described gateway device receives the modification bearing request message that first service gateway sends, and described first service gateway is the new gateway after gateway changes;
Described gateway device sends and revises bearing response message to described first service gateway, in described modification bearing response message, carry IP address and the Tunnel End Point Identifier of described Mobile Switching Center Server/media gateway, so that described first service gateway and described Mobile Switching Center Server/media gateway is set up the carrying for ip voice.
2. method according to claim 1, it is characterized in that, in the modification bearing request message that described second service gateway sends, also carry and upgrade voice bearer indication, so that carry IP address and the Tunnel End Point Identifier of described Mobile Switching Center Server/media gateway in the modification bearing response message that described gateway device sends to described first service gateway.
3. method according to claim 1, it is characterized in that, in the modification bearing response message that described gateway device sends to described first service gateway, also carry and upgrade voice bearer indication, described renewal voice bearer indication is used to indicate described first service gateway according to IP address and the Tunnel End Point Identifier of described Mobile Switching Center Server/media gateway, sets up the carrying for ip voice between described Mobile Switching Center Server/media gateway; Or described renewal voice bearer indication is used to indicate described first service gateway and notifies described Mobile Switching Center Server/media gateway to set up the carrying for ip voice between described first service gateway and described Mobile Switching Center Server/media gateway.
4. method according to claim 1, is characterized in that, described first service gateway and described Mobile Switching Center Server/media gateway is set up for the carrying of ip voice and comprised:
Described first service gateway sends update request message to described Mobile Switching Center Server/media gateway, and described update request message is carried IP address and the Tunnel End Point Identifier of described first service gateway;
Described first service gateway receives the renewal response message that described Mobile Switching Center Server/media gateway sends;
Or,
Described first service gateway sends update notification message to described Mobile Switching Center Server/media gateway, and described update notification message is carried IP address and the Tunnel End Point Identifier of described first service gateway;
Described first service gateway receives the update request message that described Mobile Switching Center Server/media gateway sends;
Described first service gateway sends and upgrades response message to described Mobile Switching Center Server/media gateway.
5. method according to claim 4, it is characterized in that, the renewal response message that described Mobile Switching Center Server/media gateway sends is described Mobile Switching Center Server/media gateway after the context upgrading according to the IP address of described first service gateway and Tunnel End Point Identifier for the carrying of ip voice, sends to described first service gateway.
6. method according to claim 4, it is characterized in that, the update request message that described Mobile Switching Center Server/media gateway sends is that described Mobile Switching Center Server/media gateway is according to IP address and the Tunnel End Point Identifier of the first service gateway comprising in the update notification message receiving, after upgrading the context of the carrying that is used for ip voice, send to described first service gateway.
7. method according to claim 4, it is characterized in that, in the update request message that described first service gateway sends to described Mobile Switching Center Server/media gateway, carry and upgrade voice bearer indication, so that described first service gateway and described Mobile Switching Center Server/media gateway is set up the carrying for ip voice; Or,
In the update notification message that described first service gateway sends to described Mobile Switching Center Server/media gateway, carry and upgrade voice bearer indication, so that described first service gateway and described Mobile Switching Center Server/media gateway is set up the carrying for ip voice.
8. a gateway device, is characterized in that, comprising:
Receiver module, the modification bearing request message sending for receiving first service gateway, described first service gateway is the new gateway after gateway changes;
Sending module, for sending and revise bearing response message to described first service gateway, carries IP address and the Tunnel End Point Identifier of Mobile Switching Center Server/media gateway in described modification bearing response message; So that described first service gateway and described Mobile Switching Center Server/media gateway is set up the carrying for ip voice;
Message sink module, the modification bearing request message sending for receiving second service gateway, in the modification bearing request message that described second service gateway sends, carry IP address and the Tunnel End Point Identifier of described Mobile Switching Center Server/media gateway, described second service gateway is the gateway before gateway changes.
9. a system is set up in carrying, it is characterized in that, comprising: gateway device, first service gateway, second service gateway and Mobile Switching Center Server/media gateway;
Described second service gateway, for sending and revise bearing request message to described gateway device, in described modification bearing request message, carry IP address and the Tunnel End Point Identifier of Mobile Switching Center Server/media gateway, described second service gateway is the gateway before gateway changes;
Described gateway device, the modification bearing request message sending for receiving described second service gateway;
Described first service gateway, for sending and revise bearing request message to described gateway device, described first service gateway is the new gateway after gateway changes;
Described gateway device, the modification bearing request message sending for receiving described first service gateway, send and revise bearing response message to described first service gateway, in described modification bearing response message, carry IP address and the Tunnel End Point Identifier of described Mobile Switching Center Server/media gateway;
Described first service gateway, for receiving described modification bearing response message;
Described first service gateway, for setting up the carrying for ip voice with described Mobile Switching Center Server/media gateway.
10. system according to claim 9, is characterized in that,
Described first service gateway, specifically for sending update request message to described Mobile Switching Center Server/media gateway, described update request message is carried IP address and the Tunnel End Point Identifier of described first service gateway; And receive the renewal response message that described Mobile Switching Center Server/media gateway sends; Or,
Described first service gateway, specifically for sending update notification message to described Mobile Switching Center Server/media gateway, described update notification message is carried IP address and the Tunnel End Point Identifier of described first service gateway; Receive the update request message that described Mobile Switching Center Server/media gateway sends, and send and upgrade response message to described Mobile Switching Center Server/media gateway.
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