CN102595375B - The implementation method of packet switching service and system between roamer and ownership place - Google Patents

The implementation method of packet switching service and system between roamer and ownership place Download PDF

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Publication number
CN102595375B
CN102595375B CN201110002765.5A CN201110002765A CN102595375B CN 102595375 B CN102595375 B CN 102595375B CN 201110002765 A CN201110002765 A CN 201110002765A CN 102595375 B CN102595375 B CN 102595375B
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message
pdp context
vsgsn
roamer
hggsn
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CN102595375A (en
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马鑫
殷湛
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ZTE Corp
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ZTE Corp
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Priority to PCT/CN2012/070035 priority patent/WO2012092859A1/en
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/10—Connection setup
    • H04W76/12—Setup of transport tunnels
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
    • H04W88/16—Gateway arrangements

Abstract

The invention discloses the implementation method of packet switching between a kind of roamer and ownership place (PS) business, the method comprises: when needing to carry out PS business, by ggsn (GGSN) agency to the forwarding of signaling and data message, the PS business between the GGSN (HGGSN) realizing roamer and ownership place.What the present invention discloses PS business between a kind of roamer and ownership place realizes system, adopts method and system of the present invention, can improve the fail safe of network, can also centralized maintenance network, thus reduces maintenance cost, and then optimized network.

Description

The implementation method of packet switching service and system between roamer and ownership place
Technical field
The present invention relates to the data transmission technology of the communications field, refer to implementation method and the system of packet switching between a kind of roamer and ownership place (PS, Packet Switch) business especially.
Background technology
3rd Generation Partnership Project (3GPP, 3rd Generation Partnership Project) standard agreement definition GPRS (GPRS, General Packet Radio Service)/Wideband Code Division Multiple Access (WCDMA) (WCDMA, Wideband Code Division Multiple Access) technology can allow user access high-speed packet data service.
In a 3 gpp system, by gn interface Connection Service GPRS Support Node (SGSN, ServingGPRS Support Node), Gateway GPRS Support Node (GGSN, Gateway GPRS SupportNode) and domain name system (DNS, Domain Name System) etc., thus the communication realized between these equipment, therefore, also the network of the gn interface connecting the said equipment can be called Gn network.
GPRS Tunnel Protocol (GTP, GPRS Tunnelling Protocol) is utilized to connect in Gn network.GTP comprises chain of command and two, user face process.Wherein, at chain of command, GTP signaling conventions travelling carriage (MS, Mobile Station) accesses tunnel control and the management agreement requirement of GPRS network, and GTP signaling mainly performs foundation, amendment and deletes the function in tunnel; In user face, GTP utilizes the tunnel set up between GPRS Support Node (GSN, GPRS Support Node) to transmit user data packets.
GPRS/WCDMA system is as the widely used mobile communication technology of one, and this system can also support the services of roaming of user between different areas and the mobile network of country.
In prior art, GGSN can be utilized to act on behalf of and to realize roaming user to access belonging area, and carry out PS business, particularly, belong to a public land mobile communication network network (PLMN, Public LandMobile-communication Network) MS roam into another PLMN after, attachment is activated on the SGSN of another PLMN, send activation request by the SGSN of another PLMN described to act on behalf of to GGSN, then GGSN agency is to the GGSN (HGGSN of MS ownership place, Homed GGSN) forward activation request, afterwards, follow-up PS business is directly carried out by SGSN and HGGSN of another PLMN described.Particularly, Fig. 1 typically utilizes GGSN to act on behalf of to realize roaming user to access belonging area in prior art, and carries out the method flow schematic diagram of PS business, as shown in Figure 1, comprises the following steps:
Step 101: roamer is to SGSN (VSGSN, Visited SGSN) initiation packet data protocol (PDP, the Packet Data Protocol) activation request of roaming place;
Step 102:VSGSN initiates dns resolution flow process, resolves the control plane address of GGSN agency;
Step 103:DNS server returns the control plane address of GGSN agency to VSGSN;
Step 104:VSGSN sends PDP Context to GGSN agency and sets up request message;
Step 105:GGSN agency receives after PDP Context sets up request message, resolves, obtain user totem information to message, and GGSN agency goes out according to this information translation the HGGSN address that user contracts;
Here, described user totem information can be specifically mobile subscriber's international number (MSISDN, MobileStation Integrated Services Digital Network) or international mobile subscriber identity (IMSI, International Mobile Subscriber Identification Number).
The PDP Context that VSGSN sends is set up the Internet Protocol (IP in request message by step 106:GGSN agency, Internet Protocol) the object IP address of wrapping is revised as the address of HGGSN corresponding to MSISDN or IMSI, is transmitted to HGGSN afterwards according to Routing Protocol;
Step 107:HGGSN receives after PDP Context sets up request message, returns PDP Context set up response directly to VSGSN;
Here, if PDP Context is successfully established, then VSGSN is according to the address of the HGGSN in response message, sets up the GTP tunnel with HGGSN; Wherein, the address of described HGGSN comprises control plane address and address, user face.
Step 108:VSGSN sends PDP context activation response message to roamer;
Step 109: roamer sends business datum message by VSGSN to HGGSN.
Roamer can initiate to upgrade or deactivation request in the process of subsequent treatment, carries out the handling process that upgrades or deactivate as shown in Figure 2, comprises the following steps:
Step 201: roamer initiates PDP Context to VSGSN and upgrades or PDP Context deactivation request;
Step 202:VSGSN initiates PDP Context to HGGSN and upgrades or PDP Context deactivation request;
Step 203:HGGSN replys PDP Context to VSGSN and upgrades or PDP Context deactivation response;
Step 204:VSGSN replys PDP Context to roamer and upgrades or PDP Context deactivation response.
Upgrade or deactivation request, also initiatively can be initiated by the network side of roamer's ownership place, as shown in Figure 3, comprise the steps:
Step 301:HGGSN initiates PDP Context to VSGSN and upgrades or PDP Context deactivation request;
Step 302:VSGSN initiates PDP Context to roamer and upgrades or PDP Context deactivation request;
Step 303: roamer replys PDP Context to VSGSN and upgrades or PDP Context deactivation response;
Step 304:VSGSN replys PDP Context to HGGSN and upgrades or PDP Context deactivation response.
As can be seen from description above, although said method utilizes GGSN agency to solve access HGGSN when user roams and carries out the problem of PS business.But control plane address and the address, user face of HGGSN can be exposed to VSGSN, so, make the fail safe of network can not be guaranteed.In addition, set up final connection owing to remaining VSGSN and HGGSN, so, VSGSN and HGGSN needs the relevant configuration of carrying out peer node path, so, causes that network operation disperses, complexity is high, optimize not.
Summary of the invention
In view of this, main purpose of the present invention is the implementation method and the system that provide PS business between a kind of roamer and ownership place, can improve the fail safe of network.
For achieving the above object, technical scheme of the present invention is achieved in that
The invention provides the implementation method of PS business between a kind of roamer and ownership place, the method comprises:
When needing to carry out PS business, act on behalf of the forwarding to signaling and data message by GGSN, realize the PS business between roamer and HGGSN.
In such scheme, by GGSN agency to the forwarding of signaling and data message before, the method comprises further:
Set up the GTP tunnel carried out between roamer and HGGSN needed for PS business.
In such scheme, between the described roamer of foundation and HGGSN, carry out the GTP tunnel needed for PS business, for:
Roamer sends PDP activation request message to VSGSN;
After VSGSN receives PDP activation request message, initiate dns resolution flow process to dns server, resolve the control plane address of GGSN agency;
Dns server returns the control plane address of GGSN agency to VSGSN;
After VSGSN receives the control plane address of GGSN agency, send PDP Context to GGSN agency and set up request message;
GGSN agency, according to forwarding rule, forwards PDP Context to HGGSN and sets up request message;
After HGGSN receives request message, carry out respective handling, and after processing is completed, return PDP Context to GGSN agency and set up response message;
GGSN agency receives after PDP Context sets up response message, forwards PDP Context set up response message to VSGSN; VSGSN receives after PDP Context sets up response message, returns PDP Context set up response message to roamer.
In such scheme, described forwarding rule, for:
Judge the APN (APN of roamer, Access Point Name) whether can mate with the APN self preserved, after determining to mate, from the GGSN address of self preserving, search the control plane address of HGGSN according to MSISDN or IMSI of roamer; Or,
Judge whether the APN of roamer can mate with the APN self preserved, after determining to mate, externally server request issues the control plane address of HGGSN, and external server issues the control plane address of HGGSN to GGSN agency according to MSISDN or IMSI of roamer.
In such scheme, describedly forward PDP Context to HGGSN and set up request message, for: amendment PDP Context sets up corresponding cell (IE, Information Elements) in request message, afterwards amended message is sent to HGGSN;
Describedly forward PDP Context to VSGSN and set up response message, for: amendment PDP Context sets up corresponding IE in response message, afterwards amended message is sent to VSGSN.
In such scheme, described amendment PDP Context sets up the corresponding IE in request message, for: control plane address and the address, user face of the address, user face of the control plane address of the VSGSN in message and VSGSN being revised as GGSN agency; Chain of command Tunnel End Point Identifier (TEIDC) in message and data surface Tunnel End Point Identifier (TEIDU) are revised as the local Tunnel End Point Identifier created of GGSN agency; Chain of command source address in message IP head and source port are revised as GGSN agency the external address of chain of command and chain of command to external port; Chain of command destination address in message IP head and destination interface are revised as specified standard port;
Described amendment PDP Context sets up the corresponding IE in response message, for: control plane address and the address, user face of the address, user face of the control plane address of the HGGSN in message GTP message body and HGGSN being revised as GGSN agency; TEIDC and TEIDU in message GTP message body is revised as the local Tunnel End Point Identifier created of GGSN agency; TEIDC in message GTP head is revised as the TEIDC of VSGSN; By the chain of command source address in message IP head and source port, be revised as GGSN agency the external address of chain of command and chain of command to external port; Chain of command destination address in message IP head and destination interface are revised as VSGSN external address and to external port.
In such scheme, describedly realize the PS business between roamer and HGGSN by the forwarding of GGSN agency to data message, for:
When data message be roamer send to HGGSN data message time, data message is sent to VSGSN by roamer, after VSGSN receives data message, sends to GGSN to act on behalf of by GTP tunnel; After GGSN agency receives data message, by the TEIDU that the TEIDU in data message GTP head is revised as HGGSN, afterwards data message is sent to HGGSN; And/or,
When data message be HGGSN send to roamer data message time, data message sends to GGSN to act on behalf of by GTP tunnel by HGGSN; After GGSN agency receives data message, by the TEIDU that the TEIDU in data message GTP head is revised as VSGSN, afterwards data message is sent to VSGSN; After VSGSN receives data message, send to roamer.
In such scheme, when signaling be the PDP Context update request message initiated of roamer or PDP Context deactivation request message time, describedly realize the PS business between roamer and HGGSN by the forwarding of GGSN agency to signaling, for:
Roamer sends PDP Context update request message or PDP Context deactivation request message to VSGSN; After VSGSN receives request message, send PDP Context update request message or PDP Context deactivation request message to GGSN agency;
After GGSN agency receives request message, amendment PDP Context update request message or PDP Context deactivate the corresponding IE in request message, afterwards amended message are sent to HGGSN;
After HGGSN receives request message, carry out respective handling, and after processing is completed, return PDP Context to GGSN agency and upgrade response message or PDP Context deactivation response message;
GGSN agency receives PDP Context and upgrades after response message or PDP Context deactivation response message, and amendment PDP Context upgrades the corresponding IE in response message or PDP Context deactivation response message, afterwards amended message is sent to VSGSN; After VSGSN receives PDP Context renewal response message or PDP Context deactivation response message, return PDP Context to roamer and upgrade response message or PDP Context deactivation response message.
In such scheme, when signaling be the PDP Context update request initiated of roamer's belonging area network side or PDP Context deactivation request message time, describedly realize the PS business between roamer and HGGSN by the forwarding of GGSN agency to signaling, for:
HGGSN sends PDP Context update request message or PDP Context deactivation request message to GGSN agency;
After GGSN agency receives request message, amendment PDP Context update request message or PDP Context deactivate the corresponding IE in request message, afterwards amended message are sent to VSGSN;
After VSGSN receives request message, send PDP Context update request message or PDP Context deactivation request message to roamer; After roamer receives request message, return PDP Context to VSGSN and upgrade response message or PDP Context deactivation response message; After VSGSN receives response message, return PDP Context to GGSN agency and upgrade response message or PDP Context deactivation response message;
After GGSN agency receives PDP Context renewal response message or PDP Context deactivation response message, amendment PDP Context upgrades the corresponding IE in response message or PDP Context deactivation response message, sends to amended message to HGGSN afterwards.
In such scheme, described amendment PDP Context update request message or PDP Context deactivate the corresponding IE in request message, for: the TEIDC TEIDC in message GTP head being revised as VSGSN; Chain of command source address in message IP head and source port are revised as GGSN agency the external address of chain of command and chain of command to external port; Chain of command destination address in IP head in message and destination interface are revised as VSGSN external address and to external port;
Described amendment PDP Context upgrades the corresponding IE in response message or PDP Context deactivation response message, for: the TEIDC TEIDC in message GTP head being revised as HGGSN; Chain of command source address in message IP head and source port are revised as GGSN agency the external address of chain of command and chain of command to external port; Chain of command destination address in message IP head and destination interface are revised as HGGSN external address and to external port.
In such scheme, when by the forwarding of GGSN agency to signaling and data message, the method comprises further: GGSN agency carries out strategy and charging control.
What present invention also offers PS business between a kind of roamer and ownership place realizes system, and this system comprises: GGSN agency, roamer and HGGSN; Wherein,
GGSN acts on behalf of, when carrying out PS business for needs, to roamer and HGGSN transmitting signaling and data message;
Roamer, when carrying out PS business for needs, acts on behalf of the forwarding to signaling and data message by GGSN, the PS business between realization and HGGSN;
HGGSN, when carrying out PS business for needs, acts on behalf of the forwarding to signaling and data message by GGSN, the PS business between realization and roamer.
In such scheme, this system comprises VSGSN and dns server further;
When setting up the GTP tunnel carried out between roamer and HGGSN needed for PS business, described roamer, for sending PDP activation request message to VSGSN; And receive the PDP Context that VSGSN returns and set up response message;
Described VSGSN, after receiving PDP activation request message that roamer sends, initiates dns resolution flow process to dns server; And after the control plane address receiving the GGSN agency that dns server returns, send PDP Context to GGSN agency and set up request message; And act on behalf of after the PDP Context returned sets up response message receiving GGSN, return PDP Context to roamer and set up response message;
Dns server, for receive VSGSN initiate process of analysis after, resolve GGSN agency control plane address, backward VSGSN return GGSN agency control plane address;
Described GGSN agency, after receiving request message, according to forwarding rule, forwarding PDP Context to HGGSN and setting up request message; And receiving after PDP Context that HGGSN returns sets up response message, forwarding PDP Context to VSGSN and setting up response message;
Described HGGSN, after receiving request message, carries out respective handling, and after processing is completed, returns PDP Context set up response message to GGSN agency.
In such scheme, when carrying out the forwarding of data message, described roamer, specifically for: data message is sent to VSGSN; And/or, receive the data message that VSGSN sends;
Described VSGSN, after receiving data message that roamer is sent to, sends to GGSN to act on behalf of by GTP tunnel data message; And/or, after the data message receiving GGSN agency transmission, data message is sent to roamer;
Described GGSN agency, specifically for: after receiving the data message of VSGSN transmission, by the TEIDU that the TEIDU in data message GTP head is revised as HGGSN, afterwards data message is sent to HGGSN; And/or, after the data message receiving HGGSN transmission, by the TEIDU that the TEIDU in data message GTP head is revised as VSGSN, afterwards data message is sent to VSGSN;
Described HGGSN, specifically for: receive the data message that GGSN agency sends; And/or, send to GGSN to act on behalf of by GTP tunnel data message.
In such scheme, when signaling be the PDP Context update request initiated of roamer or PDP Context deactivation request message time, described roamer, specifically for: send PDP Context update request message or PDP Context deactivation request message to VSGSN; And receive the PDP Context that VSGSN returns and upgrade response message or PDP Context deactivation response message;
Described VSGSN, after receiving request message that roamer is sent to, sends PDP Context update request message or PDP Context deactivation request message to GGSN agency; And act on behalf of after the PDP Context that returns upgrades response message or PDP Context deactivation response message receiving GGSN, PDP Context is upgraded response message or PDP Context deactivation response message returns to roamer;
Described GGSN agency, specifically for: after receiving the request message of VSGSN transmission, the corresponding IE in modify request messages, sends to HGGSN by amended message afterwards; And receiving after PDP Context that HGGSN returns upgrades response message or PDP Context deactivation response message, the corresponding IE in amendment response message, sends to VSGSN by amended message afterwards;
Described HGGSN, specifically for: after receiving the request message of GGSN agency transmission, carry out respective handling, and after processing is completed, return PDP Context to GGSN agency and upgrade response message or PDP Context deactivation response message.
In such scheme, when signaling is PDP Context update request or the PDP Context deactivation request message of the initiation of roamer's belonging area network side, described HGGSN, specifically for: send PDP Context update request message or PDP Context deactivation request message to GGSN agency; And the PDP Context receiving GGSN agency transmission upgrades response message or PDP Context deactivation response message;
Described GGSN agency, specifically for: after receiving the request message of HGGSN transmission, the corresponding IE in modify request messages, sends to VSGSN by amended message afterwards; And receiving after PDP Context that VSGSN returns upgrades response message or PDP Context deactivation response message, the corresponding IE in amendment response message, sends to HGGSN by amended message afterwards;
Described VSGSN, for receiving after GGSN acts on behalf of the request message be sent to, sends PDP Context update request message or PDP Context deactivation request message to roamer; And receiving after PDP Context that roamer returns upgrades response message or PDP Context deactivation response message, returning PDP Context to GGSN agency and upgrading response message or PDP Context deactivation response message;
Described roamer, specifically for: after receiving the request message of VSGSN transmission, return PDP Context to VSGSN and upgrade response message or PDP Context deactivation response message.
In such scheme, described GGSN agency, also for while forwarding signaling and data message, carries out strategy and charging control.
The implementation method of PS business and system between roamer provided by the invention and ownership place, the forwarding to signaling and data message is acted on behalf of by GGSN, realize the PS business between roamer and HGGSN, the address of HGGSN can not be exposed to the on-site VSGSN of roamer, so, the fail safe of network can be improved.
In addition, acted on behalf of the connection of setting up between VSGSN and HGGSN by GGSN, do not need the relevant configuration of carrying out end node path on VSGSN, so, make network energy centralized maintenance, thus reduce maintenance cost, and then optimized network.
Accompanying drawing explanation
Fig. 1 typically utilizes GGSN to act on behalf of to realize roaming user to access belonging area and the method flow schematic diagram carrying out PS business in prior art;
Fig. 2 is that in prior art, user initiates the handling process schematic diagram upgraded or deactivation is asked;
Fig. 3 is that in prior art, user ascription area network side initiates the handling process schematic diagram upgraded or deactivation is asked;
Fig. 4 is the method flow schematic diagram that the present invention realizes PS business between roamer and ownership place;
Fig. 5 is for realizing the method flow schematic diagram of step 401 in flow chart shown in Fig. 4;
Fig. 6 is that embodiment one acts on behalf of the forwarding to signaling by GGSN, realizes the method flow schematic diagram of PS business between roamer and ownership place;
Fig. 7 is that embodiment two acts on behalf of the forwarding to signaling by GGSN, realizes the method flow schematic diagram of PS business between roamer and ownership place;
Fig. 8 is the system configuration schematic diagram that the present invention realizes PS business between roamer and ownership place.
Embodiment
Basic thought of the present invention is: when needing to carry out PS business, acts on behalf of the forwarding to signaling and data message, realize the PS business between roamer and HGGSN by GGSN.
Below in conjunction with drawings and the specific embodiments, the present invention is further described in more detail.
The implementation method of PS business between roamer of the present invention and ownership place, as shown in Figure 4, comprises the following steps:
Step 401: when needing to carry out PS business, sets up the GTP tunnel carried out between roamer and HGGSN needed for PS business;
Particularly, as shown in Figure 5, comprise the following steps:
Step 501: roamer sends PDP activation request message to VSGSN;
Here, described PDP activation request message comprises the APN of roamer.
After step 502:VSGSN receives PDP activation request message, initiate dns resolution flow process to dns server, resolve the control plane address of GGSN agency;
Particularly, DNS carries out DNS query according to described APN, and then resolves the control plane address obtaining GGSN agency, and concrete handling process is identical with the handling process of prior art, repeats no more here.
Step 503:DNS server returns the control plane address of GGSN agency to VSGSN.
After step 504:VSGSN receives the control plane address of GGSN agency, send PDP Context to GGSN agency and set up request message;
Here, described PDP Context is set up request message and is comprised the APN of roamer and MSISDN or IMSI of roamer.
Step 505:GGSN agency, according to forwarding rule, forwards PDP Context to HGGSN and sets up request message;
Here, described forwarding rule, is specially:
Judge whether the APN of roamer can mate with the APN self preserved, after determining to mate, from the GGSN address of self preserving, search the control plane address of HGGSN according to MSISDN or IMSI of roamer; Or,
Judge whether the APN of roamer can mate with the APN self preserved, after determining to mate, externally server request issues the control plane address of HGGSN, and external server issues the control plane address of HGGSN to GGSN agency according to MSISDN or IMSI of roamer;
Wherein, GGSN agency to search the concrete handling process of HGGSN according to MSISDN or IMSI of roamer identical with the handling process of prior art;
If the APN that APN and the GGSN of roamer preserves can not mate, then illustrate that roamer can not access, now, return failure by VSGSN to roamer, roamer then can not initiate activation request again; If GGSN agency does not find the control plane address of HGGSN, then return failure by VSGSN to roamer, roamer then can not initiate activation request by GGSN agency to HGGSN again;
Described to HGGSN forward PDP Context set up request message, be specially:
Corresponding IE in amendment message, sends to HGGSN by amended message afterwards;
Corresponding IE in described amendment message, is specially:
The address, user face of the control plane address of the VSGSN in message and VSGSN is revised as chain of command (GTPC) address and user face (GTPU) address of GGSN agency; TEIDC and TEIDU in message is revised as the local Tunnel End Point Identifier created of GGSN agency; Chain of command source address in message IP head and source port are revised as GGSN agency the external address of chain of command and chain of command to external port; Chain of command destination address in message IP head and destination interface are revised as specified standard port;
Wherein, the chain of command Tunnel End Point Identifier in described message just refers to the TEIDC of VSGSN, and the data surface Tunnel End Point Identifier in described message just refers to the TEIDU of VSGSN;
Described specified standard port refers to 3GPP agreement specified standard port, when setting up GTP tunnel, now, because GGSN agency cannot know the port numbers of HGGSN, therefore, adopts agreement specified standard port numbers;
When forwarding PDP Context to HGGSN and setting up request message, GGSN agency can also carry out strategy further and charging controls;
Wherein, the rule that GGSN agency can issue according to the rule of this locality configuration or external server or ext nal network element, carries out strategy and charging control; Described strategy and charging control: service quality (QoS, Quality of Service) controls, the Real time Billing Online etc. of charging Characteristics Control and external server; Wherein, charging Characteristics Control just refers to the control of charging way; The Real time Billing Online of external server refers to that GGSN agency connects external server, and the Real time Billing Online supporting external server to issue controls;
The configuration information of GGSN agency is identical with the configuration information that GGSN in prior art acts on behalf of, and does not need additional configuration out of Memory.
Step 506:HGGSN receives after PDP Context sets up request message, carries out respective handling, and after processing is completed, returns PDP Context set up response message to GGSN agency;
Here, described in carry out respective handling and refer to: the process carrying out the information relevant to setting up GTP tunnel, concrete handling process is identical with prior art, repeats no more here;
Described PDP Context is set up response message and is comprised and process successfully or failed cause value.
Step 507:GGSN agency receives after PDP Context sets up response message, forwards PDP Context set up response message to VSGSN;
Described to VSGSN forward PDP Context set up response message, be specially:
Corresponding IE in amendment message, sends to VSGSN by amended message afterwards;
Corresponding IE in described amendment message, is specially:
The address, user face of the control plane address of the HGGSN in message GTP message body and HGGSN is revised as GTPC address and the GTPU address of GGSN agency; TEIDC and TEIDU in message GTP message body is revised as the local Tunnel End Point Identifier created of GGSN agency; TEIDC in message GTP head is revised as the TEIDC of VSGSN; By the chain of command source address in message IP head and source port, be revised as GGSN agency the external address of chain of command and chain of command to external port; Chain of command destination address in message IP head and destination interface are revised as VSGSN external address and to external port;
GGSN agency receive VSGSN send PDP Context set up request message after, the address of VSGSN, Endpoint ID and port numbers can be preserved; Wherein, the address of VSGSN comprises control plane address and address, user face; Same, after the PDP Context receiving HGGSN transmission sets up response message, the address of HGGSN, Endpoint ID and port numbers can be preserved, complete the foundation in tunnel so that follow-up, and carry out PS business; Wherein, the address of HGGSN comprises control plane address and address, user face;
When forwarding PDP Context to VSGSN and setting up response message, GGSN agency can also carry out strategy further and charging controls;
Wherein, the rule that GGSN agency can issue according to the rule of this locality configuration or external server or ext nal network element, carries out strategy and charging control; Described strategy and charging control: QoS control, charging Characteristics Control and external server Real time Billing Online etc., strategy is identical with the processing procedure that charging controls with carrying out in step 505, repeats no more here.
Step 508:VSGSN receives after PDP Context sets up response message, returns PDP Context set up response message to roamer;
After this step completes, explanation activation process completes, and when the cause value that the PDP Context that HGGSN returns is set up in response message be successfully time, the GTP tunnel carrying out PS business between roamer and ownership place is set up, and data and the signaling of follow-up PS business are all transmitted by this GTP tunnel;
When the cause value that the PDP Context that roamer receives is set up in response message be unsuccessfully time, roamer can again by GGSN agency to HGGSN initiate activation request, also can not initiate activation request.
Step 402: act on behalf of the forwarding to signaling and data message by GGSN, realize the PS business between roamer and HGGSN;
Particularly, when data message be roamer send to HGGSN data message time, data message is sent to VSGSN by roamer, after VSGSN receives data message, sends to GGSN to act on behalf of by GTP tunnel; After GGSN agency receives data message, by the TEIDU that the TEIDU in data message GTP head is revised as HGGSN, afterwards data message is sent to HGGSN;
When data message be HGGSN send to roamer data message time, data message sends to GGSN to act on behalf of by GTP tunnel by HGGSN; After GGSN agency receives data message, by the TEIDU that the TEIDU in data message GTP head is revised as VSGSN, afterwards data message is sent to VSGSN; After VSGSN receives data message, send to roamer;
Described signaling comprises chain of command signaling and user's plane signaling; Wherein, described chain of command signaling comprises the message etc. in the message of PDP Context more in new technological process, PDP Context deactivation flow process; Described user's plane signaling comprises: Echo message etc.
When signaling is the Echo message in user face, and when Echo message be roamer send to HGGSN Echo message time, Echo message is sent to VSGSN by roamer, after VSGSN receives Echo message, sends to GGSN to act on behalf of by GTP tunnel; After GGSN agency receives Echo message, the source address in Echo message IP head and destination address are revised as respectively the address of GGSN agency and the address of HGGSN, afterwards Echo message are sent to HGGSN;
When Echo message be HGGSN send to roamer Echo message time, Echo message sends to GGSN to act on behalf of by GTP tunnel by HGGSN; After GGSN agency receives Echo message, source address in IP head in Echo message and destination address are revised as respectively the address of GGSN agency and the address of VSGSN, afterwards Echo message is sent to VSGSN, after VSGSN receives Echo message, Echo message is sent to roamer;
While forwarding signaling and data message, GGSN agency can also carry out strategy further and charging controls; Concrete handling process with carry out in step 505 strategy identical with the handling process that charging controls, repeat no more here.
Adopt the implementation method of packet switching service between roamer provided by the invention and ownership place, do not need the relevant configuration of carrying out peer node path on VSGSN, only need on HGGSN and GGSN agency configures, so, network operation is got up more concentrated, and then optimized network.
Respectively the message forwarding in the message in PDP Context more new technological process and PDP Context deactivation flow process and processing procedure are described in detail below in conjunction with embodiment.
Embodiment one
The application scenarios of the present embodiment is: when roamer needs to carry out routing update or QoS renewal etc., roamer initiatively initiates PDP Context update request; Roamer need roll off the production line or abnormal shutdown wait time, roamer initiatively initiate PDP Context deactivate ask.
The present embodiment, by the forwarding of GGSN agency to signaling, realizes the method for PS business between roamer and HGGSN, as shown in Figure 6, comprises the following steps:
Step 601: roamer sends PDP Context update request message to VSGSN.
After step 602:VSGSN receives request message, send PDP Context update request message to GGSN agency.
After step 603:GGSN agency receives request message, the corresponding IE in modify request messages, sends to HGGSN by amended message afterwards;
Here, the corresponding IE in described modify request messages, is specially:
The address, user face of the control plane address of the VSGSN in message GTP message body and VSGSN is revised as GTPC address and the GTPU address of GGSN agency; TEIDC and TEIDU in message GTP message body is revised as the local Tunnel End Point Identifier created of GGSN agency; TEIDC in message GTP head is revised as the TEIDC of HGGSN; Chain of command source address in message IP head and source port are revised as GGSN agency the external address of chain of command and chain of command to external port; Chain of command destination address in message IP head and destination interface are revised as HGGSN external address and to external port;
Wherein, due in existing GGSN equipment, some equipment can not meet the regulation of 3GPP agreement completely, therefore, for ensureing that message accurately can arrive HGGSN, upgrade for routing update or cross-version, the chain of command Tunnel End Point Identifier in message GTP head remains unchanged;
Due in activation process, GGSN agency has known the port numbers of HGGSN, therefore, now the chain of command destination address in message IP head and destination interface are revised as HGGSN external address and to external port;
When amended message being sent to HGGSN, GGSN agency can also carry out strategy further and charging controls, and strategy is identical with the processing procedure that charging controls with carrying out in step 505, repeats no more here.
After step 604:HGGSN receives request message, carry out respective handling, and after processing is completed, return PDP Context to GGSN agency and upgrade response message;
Here, carry out respective handling described in refer to: the process carrying out the information relevant to amendment GTP tunnel, concrete handling process is identical with prior art, repeats no more here.
After step 605:GGSN agency receives PDP Context renewal response message, the corresponding IE in amendment response message, sends to VSGSN by amended message afterwards;
Here, the corresponding IE in described amendment response message, is specially:
The address, user face of the control plane address of the HGGSN in message GTP message body and HGGSN is revised as GTPC address and the GTPU address of GGSN agency; TEIDC and TEIDU in message GTP message body is revised as the local Tunnel End Point Identifier created of GGSN agency; TEIDC in message GTP head is revised as the TEIDC of VSGSN; Chain of command source address in message IP head and source port are revised as GGSN agency the external address of chain of command and chain of command to external port; Chain of command destination address in message IP head and destination interface are changed to VSGSN external address and to external port;
When amended message being sent to VSGSN, GGSN agency can also carry out strategy and charging control further, concrete processing procedure with carry out tactful identical with the processing procedure that charging controls in step 505, repeat no more here.
Step 606:VSGSN returns PDP Context to roamer and upgrades response message after receiving PDP Context renewal response message;
Here, roamer if need the transfer of data of carrying out PS business, is then adopted amended tunnel, realizes the transmission of data by GGSN after the forwarding acted on behalf of after receiving and upgrading response message.
If roamer to VSGSN send be PDP Context deactivation request message, then more new technological process is substantially identical for handling process and PDP Context, and difference is:
In step 603, the corresponding IE in modify request messages, be then specially:
TEIDC in message GTP head is revised as the TEIDC of HGGSN; Chain of command source address in message IP head and source port are revised as GGSN agency the external address of chain of command and chain of command to external port; Chain of command destination address in message IP head and destination interface are revised as HGGSN external address and to external port.
In step 604, carry out respective handling and refer to: the process carrying out the information relevant to deleting GTP tunnel, concrete handling process is identical with prior art, repeats no more here.
In step 605, the corresponding IE in amendment response message, be then specially:
TEIDC in message GTP head is revised as the TEIDC of VSGSN; Chain of command source address in message IP head and source port are revised as GGSN agency the external address of chain of command and chain of command to external port; Chain of command destination address in message IP head and destination interface are revised as VSGSN external address and to external port.
Embodiment two
The application scenarios of the present embodiment is: the network side of roamer's ownership place needs to upgrade, such as strategy and charging rule functions (PCRF, Policy and Charging Rules Function) renewal etc. initiated, now, HGGSN initiatively initiates PDP Context update request; When network side goes wrong, need to deactivate, such as: the deactivation etc. that Online Charging System (OCS, Online Charging System) or PCRF initiate, now, HGGSN initiatively initiates PDP Context deactivation request.
The present embodiment, by the forwarding of GGSN agency to signaling, realizes the method for PS business between roamer and HGGSN, as shown in Figure 7, comprises the following steps:
Step 701:HGGSN sends PDP Context update request message to GGSN agency.
After step 702:GGSN agency receives request message, the corresponding IE in modify request messages, sends to VSGSN by amended message afterwards;
Here, the corresponding IE in described modify request messages, is specially:
TEIDC in message GTP head is revised as the TEIDC of VSGSN; Chain of command source address in message IP head and source port are revised as GGSN agency the external address of chain of command and chain of command to external port; Chain of command destination address in IP head in message and destination interface are revised as VSGSN external address and to external port;
When amended message being sent to VSGSN, GGSN agency can also carry out strategy further and charging controls, and strategy is identical with the processing procedure that charging controls with carrying out in step 505, repeats no more here.
After step 703:VSGSN receives request message, send PDP Context update request message to roamer.
Step 704: after roamer receives request message, returns PDP Context to VSGSN and upgrades response message;
Here, after roamer receives request message, do not carry out any process, return PDP Context directly to VSGSN and upgrade response message.
After step 705:VSGSN receives response message, return PDP Context to GGSN agency and upgrade response message.
After step 706:GGSN agency receives PDP Context renewal response message, the corresponding IE in amendment response message, sends to HGGSN by amended message afterwards;
Here, the corresponding IE in described amendment response message, is specially:
TEIDC in message GTP head is revised as the TEIDC of HGGSN; Chain of command source address in message IP head and source port are revised as GGSN agency the external address of chain of command and chain of command to external port; Chain of command destination address in message IP head and destination interface are revised as HGGSN external address and to external port;
When sending to amended message to HGGSN, GGSN agency can also carry out strategy further and charging controls, identical with the processing procedure of step 505, repeats no more here;
After roamer returns PDP Context renewal response message, if need to initiate PS service request, then need to re-execute step 401 ~ 402, re-establish GTP tunnel, carry out the PS business responded afterwards.
If HGGSN to GGSN agency send be PDP Context deactivation request message, handling process and PDP Context more new technological process are identical, repeat no more here.
It should be noted that: the GGSN agency in the present invention is except having above-mentioned functions, and domestic consumer can also be activated on GGSN agency, the PS business between realization and GGSN act on behalf of.
For realizing said method, what present invention also offers PS business between a kind of roamer and ownership place realizes system, and as shown in Figure 8, this system comprises: GGSN agency 81, roamer 82 and HGGSN83; Wherein,
GGSN agency 81, when carrying out PS business for needs, to roamer 82 and HGGSN 83 transmitting signaling and data message;
Roamer 82, when carrying out PS business for needs, acted on behalf of the forwarding of 81 pairs of signalings and data message by GGSN, the PS business between realization and HGGSN 83;
HGGSN 83, when carrying out PS business for needs, acts on behalf of the forwarding of 81 pairs of signalings and data message by GGSN, the PS business between realization and roamer 82.
Wherein, described GGSN agency 81, while can also being used for forwarding signaling and data message, carries out strategy and charging control.
This system can further include VSGSN and dns server; Wherein,
Particularly, when setting up the GTP tunnel carried out between roamer 82 and HGGSN 83 needed for PS business, described roamer 82, for sending PDP activation request message to VSGSN; And receive the PDP Context that VSGSN returns and set up response message;
VSGSN, after receiving PDP activation request message that roamer 82 sends, initiates dns resolution flow process to dns server; And after the control plane address receiving the GGSN agency 81 that dns server returns, send PDP Context to GGSN agency 81 and set up request message; And receiving after the PDP Contexts that return of GGSN agency 81 set up response message, returning PDP Context to roamer 82 and setting up response message;
Dns server, for receive VSGSN initiate process of analysis after, resolve GGSN agency 81 control plane address, backward VSGSN return GGSN agency 81 control plane address;
Described GGSN agency 81, after receiving request message, according to forwarding rule, forwarding PDP Context to HGGSN 83 and setting up request message; And receiving after PDP Context that HGGSN 83 returns sets up response message, forwarding PDP Context to VSGSN and setting up response message;
Described HGGSN 83, after receiving request message, carries out respective handling, and after processing is completed, returns PDP Context set up response message to GGSN agency 81.
When carrying out the forwarding of data message, described roamer 82, specifically for: data message is sent to VSGSN; And/or, receive the data message that VSGSN sends;
Described VSGSN, after receiving data message that roamer 82 is sent to, sends to GGSN to act on behalf of 81 by GTP tunnel data message; And/or, after the data message receiving GGSN agency 81 transmission, data message is sent to roamer 82;
Described GGSN agency 81, specifically for: after receiving the data message of VSGSN transmission, by the TEIDU that the TEIDU in data message GTP head is revised as HGGSN, afterwards data message is sent to HGGSN 83; And/or, after the data message receiving HGGSN 83 transmission, by the TEIDU that the TEIDU in data message GTP head is revised as VSGSN, afterwards data message is sent to VSGSN;
Described HGGSN 83, specifically for: receive the data message that GGSN agency 81 sends; And/or, send to GGSN to act on behalf of 81 by GTP tunnel data message.
When signaling is the Echo message in user face, described roamer 82, specifically for: Echo message is sent to VSGSN; And/or, receive the Echo message that VSGSN sends;
Described VSGSN, after receiving Echo message that roamer 82 is sent to, sends to GGSN to act on behalf of 81 by GTP tunnel Echo message; And/or, after the Echo message receiving GGSN agency 81 transmission, Echo message is sent to roamer 82;
Described GGSN agency 81, specifically for: after receiving the Echo message of VSGSN transmission, the source address in Echo message IP head and destination address are revised as respectively GGSN and act on behalf of the address of 81 and the address of HGGSN83, afterwards Echo message is sent to HGGSN 83; And/or, after the Echo message receiving HGGSN 83 transmission, the source address in IP head in Echo message and destination address are revised as respectively GGSN and act on behalf of the address of 81 and the address of VSGSN, afterwards Echo message is sent to VSGSN;
Described HGGSN 83, specifically for: receive the Echo message that GGSN agency 81 sends; And/or, send to GGSN to act on behalf of 81 by GTP tunnel Echo message.
When signaling be the PDP Context update request initiated of roamer or PDP Context deactivation request message time, described roamer 82, specifically for: send PDP Context update request message or PDP Context deactivation request message to VSGSN; And receive the PDP Context that VSGSN returns and upgrade response message or PDP Context deactivation response message;
Described VSGSN, after receiving request message that roamer 82 is sent to, sends PDP Context update request message or PDP Context deactivation request message to GGSN agency 81; And receiving after the PDP Contexts that return of GGSN agency 81 upgrade response messages or PDP Context deactivation response message, PDP Context is upgraded response message or PDP Context deactivation response message returns to roamer 82;
Described GGSN agency 81, specifically for: after receiving the request message of VSGSN transmission, the corresponding IE in modify request messages, sends to HGGSN 83 by amended message afterwards; And receiving after PDP Context that HGGSN83 returns upgrades response message or PDP Context deactivation response message, the corresponding IE in amendment response message, sends to VSGSN by amended message afterwards;
Described HGGSN 83, specifically for: after receiving the request message of GGSN agency 81 transmission, carry out respective handling, and after processing is completed, return PDP Context to GGSN agency 81 and upgrade response message or PDP Context deactivation response message.
When signaling is PDP Context update request or the PDP Context deactivation request message of the initiation of roamer's belonging area network side, described HGGSN 83, specifically for: send PDP Context update request message or PDP Context deactivation request message to GGSN agency 81; And the PDP Context receiving GGSN agency 81 transmission upgrades response message or PDP Context deactivation response message;
Described GGSN agency 81, specifically for: after receiving the request message of HGGSN 83 transmission, the corresponding IE in modify request messages, sends to VSGSN by amended message afterwards; And receiving after PDP Context that VSGSN returns upgrades response message or PDP Context deactivation response message, the corresponding IE in amendment response message, sends to HGGSN 83 by amended message afterwards;
Described VSGSN, after receiving the request messages that are sent to of GGSN agency 81, sends PDP Context update request message or PDP Context deactivation request message to roamer 82; And receiving after PDP Context that roamer 82 returns upgrades response message or PDP Context deactivation response message, returning PDP Context to GGSN agency 81 and upgrading response message or PDP Context deactivation response message;
Described roamer 82, specifically for: after receiving the request message of VSGSN transmission, return PDP Context to VSGSN and upgrade response message or PDP Context deactivation response message.
Here, the concrete processing procedure of the GGSN agency in described system of the present invention describes in detail hereinbefore, repeats no more.
The above, be only preferred embodiment of the present invention, be not intended to limit protection scope of the present invention, and all any amendments done within the spirit and principles in the present invention, equivalent replacement and improvement etc., all should be included within protection scope of the present invention.

Claims (14)

1. the implementation method of packet switching PS business between roamer and ownership place, it is characterized in that, the method comprises:
Roamer sends packet data protocol (PDP) activating request message to the SGSN VSGSN of roaming place;
After VSGSN receives PDP activation request message, initiate dns resolution flow process to domain name system DNS server, resolve the control plane address of GGSN agency;
Dns server returns the control plane address of GGSN agency to VSGSN;
After VSGSN receives the control plane address of GGSN agency, send PDP Context to GGSN agency and set up request message;
GGSN agency, according to forwarding rule, forwards PDP Context to HGGSN and sets up request message;
After HGGSN receives request message, carry out respective handling, and after processing is completed, return PDP Context to GGSN agency and set up response message;
GGSN agency receives after PDP Context sets up response message, and amendment PDP Context sets up the corresponding IE in response message, afterwards amended message is sent to VSGSN; VSGSN receives after PDP Context sets up response message, returns PDP Context set up response message to roamer;
When needing to carry out PS business, by ggsn GGSN agency to the forwarding of signaling and data message, the PS business between the GGSN HGGSN realizing roamer and ownership place.
2. method according to claim 1, is characterized in that, described forwarding rule, for:
Judge whether the APN APN of roamer can mate with the APN self preserved, after determining to mate, from the GGSN address of self preserving, search the control plane address of HGGSN according to mobile subscriber's international number MSISDN of roamer or international mobile subscriber identity IMSI; Or,
Judge whether the APN of roamer can mate with the APN self preserved, after determining to mate, externally server request issues the control plane address of HGGSN, and external server issues the control plane address of HGGSN to GGSN agency according to MSISDN or IMSI of roamer.
3. method according to claim 1, is characterized in that,
Described GGSN agency, according to forwarding rule, forwards PDP Context to HGGSN and sets up request message, for: described GGSN agency is according to forwarding rule, and amendment PDP Context sets up the corresponding cell IE in request message, afterwards amended message is sent to HGGSN.
4. method according to claim 1, is characterized in that,
Described amendment PDP Context sets up the corresponding IE in request message, for: control plane address and the address, user face of the address, user face of the control plane address of the VSGSN in message and VSGSN being revised as GGSN agency; Chain of command Tunnel End Point Identifier TEIDC in message and data surface Tunnel End Point Identifier TEIDU is revised as the local Tunnel End Point Identifier created of GGSN agency; Chain of command source address in message Internet Protocol IP head and source port are revised as GGSN agency the external address of chain of command and chain of command to external port; Chain of command destination address in message IP head and destination interface are revised as specified standard port;
Described amendment PDP Context sets up the corresponding IE in response message, for: control plane address and the address, user face of the address, user face of the control plane address of the HGGSN in message GTP message body and HGGSN being revised as GGSN agency; TEIDC and TEIDU in message GTP message body is revised as the local Tunnel End Point Identifier created of GGSN agency; TEIDC in message GTP head is revised as the TEIDC of VSGSN; By the chain of command source address in message IP head and source port, be revised as GGSN agency the external address of chain of command and chain of command to external port; Chain of command destination address in message IP head and destination interface are revised as VSGSN external address and to external port.
5. the method according to any one of Claims 1-4, is characterized in that, describedly realizes the PS business between roamer and HGGSN by the forwarding of GGSN agency to data message, for:
When data message be roamer send to HGGSN data message time, data message is sent to VSGSN by roamer, after VSGSN receives data message, sends to GGSN to act on behalf of by GTP tunnel; After GGSN agency receives data message, by the TEIDU that the TEIDU in data message GTP head is revised as HGGSN, afterwards data message is sent to HGGSN; And/or,
When data message be HGGSN send to roamer data message time, data message sends to GGSN to act on behalf of by GTP tunnel by HGGSN; After GGSN agency receives data message, by the TEIDU that the TEIDU in data message GTP head is revised as VSGSN, afterwards data message is sent to VSGSN; After VSGSN receives data message, send to roamer.
6. the method according to any one of Claims 1-4, it is characterized in that, when signaling be the PDP Context update request message initiated of roamer or PDP Context deactivation request message time, described by the forwarding of GGSN agency to signaling, realize the PS business between roamer and HGGSN, for:
Roamer sends PDP Context update request message or PDP Context deactivation request message to VSGSN; After VSGSN receives request message, send PDP Context update request message or PDP Context deactivation request message to GGSN agency;
After GGSN agency receives request message, amendment PDP Context update request message or PDP Context deactivate the corresponding IE in request message, afterwards amended message are sent to HGGSN;
After HGGSN receives request message, carry out respective handling, and after processing is completed, return PDP Context to GGSN agency and upgrade response message or PDP Context deactivation response message;
GGSN agency receives PDP Context and upgrades after response message or PDP Context deactivation response message, and amendment PDP Context upgrades the corresponding IE in response message or PDP Context deactivation response message, afterwards amended message is sent to VSGSN; After VSGSN receives PDP Context renewal response message or PDP Context deactivation response message, return PDP Context to roamer and upgrade response message or PDP Context deactivation response message.
7. the method according to any one of Claims 1-4, it is characterized in that, when signaling is PDP Context update request or the PDP Context deactivation request message of the initiation of roamer's belonging area network side, described by the forwarding of GGSN agency to signaling, realize the PS business between roamer and HGGSN, for:
HGGSN sends PDP Context update request message or PDP Context deactivation request message to GGSN agency;
After GGSN agency receives request message, amendment PDP Context update request message or PDP Context deactivate the corresponding IE in request message, afterwards amended message are sent to VSGSN;
After VSGSN receives request message, send PDP Context update request message or PDP Context deactivation request message to roamer; After roamer receives request message, return PDP Context to VSGSN and upgrade response message or PDP Context deactivation response message; After VSGSN receives response message, return PDP Context to GGSN agency and upgrade response message or PDP Context deactivation response message;
After GGSN agency receives PDP Context renewal response message or PDP Context deactivation response message, amendment PDP Context upgrades the corresponding IE in response message or PDP Context deactivation response message, sends to amended message to HGGSN afterwards.
8. method according to claim 7, is characterized in that,
Described amendment PDP Context update request message or PDP Context deactivate the corresponding IE in request message, for: the TEIDC TEIDC in message GTP head being revised as VSGSN; Chain of command source address in message IP head and source port are revised as GGSN agency the external address of chain of command and chain of command to external port; Chain of command destination address in IP head in message and destination interface are revised as VSGSN external address and to external port;
Described amendment PDP Context upgrades the corresponding IE in response message or PDP Context deactivation response message, for: the TEIDC TEIDC in message GTP head being revised as HGGSN; Chain of command source address in message IP head and source port are revised as GGSN agency the external address of chain of command and chain of command to external port; Chain of command destination address in message IP head and destination interface are revised as HGGSN external address and to external port.
9. the method according to any one of Claims 1-4, is characterized in that, when by the forwarding of GGSN agency to signaling and data message, the method comprises further:
GGSN agency carries out strategy and charging controls.
10. between roamer and ownership place PS business realize a system, it is characterized in that, this system comprises: GGSN agency, roamer and HGGSN; Wherein,
GGSN acts on behalf of, when carrying out PS business for needs, to roamer and HGGSN transmitting signaling and data message;
Roamer, when carrying out PS business for needs, acts on behalf of the forwarding to signaling and data message by GGSN, the PS business between realization and HGGSN;
HGGSN, when carrying out PS business for needs, acts on behalf of the forwarding to signaling and data message by GGSN, the PS business between realization and roamer;
When setting up the GTP tunnel carried out between roamer and HGGSN needed for PS business, described roamer, for sending PDP activation request message to VSGSN; And receive the PDP Context that VSGSN returns and set up response message;
Described VSGSN, after receiving PDP activation request message that roamer sends, initiates dns resolution flow process to dns server; And after the control plane address receiving the GGSN agency that dns server returns, send PDP Context to GGSN agency and set up request message; And act on behalf of after the PDP Context returned sets up response message receiving GGSN, return PDP Context to roamer and set up response message;
Dns server, for receive VSGSN initiate process of analysis after, resolve GGSN agency control plane address, backward VSGSN return GGSN agency control plane address;
Described GGSN agency, after receiving request message, according to forwarding rule, forwarding PDP Context to HGGSN and setting up request message; And receiving after PDP Context that HGGSN returns sets up response message, amendment PDP Context sets up the corresponding IE in response message, and amended message is sent to VSGSN;
Described HGGSN, after receiving request message, carries out respective handling, and after processing is completed, returns PDP Context set up response message to GGSN agency.
11. systems according to claim 10, is characterized in that, when carrying out the forwarding of data message, and described roamer, specifically for: data message is sent to VSGSN; And/or, receive the data message that VSGSN sends;
Described VSGSN, after receiving data message that roamer is sent to, sends to GGSN to act on behalf of by GTP tunnel data message; And/or, after the data message receiving GGSN agency transmission, data message is sent to roamer;
Described GGSN agency, specifically for: after receiving the data message of VSGSN transmission, by the TEIDU that the TEIDU in data message GTP head is revised as HGGSN, afterwards data message is sent to HGGSN; And/or, after the data message receiving HGGSN transmission, by the TEIDU that the TEIDU in data message GTP head is revised as VSGSN, afterwards data message is sent to VSGSN;
Described HGGSN, specifically for: receive the data message that GGSN agency sends; And/or, send to GGSN to act on behalf of by GTP tunnel data message.
12. systems according to claim 10, it is characterized in that, when signaling be the PDP Context update request initiated of roamer or PDP Context deactivation request message time, described roamer, specifically for: send PDP Context update request message or PDP Context deactivation request message to VSGSN; And receive the PDP Context that VSGSN returns and upgrade response message or PDP Context deactivation response message;
Described VSGSN, after receiving request message that roamer is sent to, sends PDP Context update request message or PDP Context deactivation request message to GGSN agency; And act on behalf of after the PDP Context that returns upgrades response message or PDP Context deactivation response message receiving GGSN, PDP Context is upgraded response message or PDP Context deactivation response message returns to roamer;
Described GGSN agency, specifically for: after receiving the request message of VSGSN transmission, the corresponding IE in modify request messages, sends to HGGSN by amended message afterwards; And receiving after PDP Context that HGGSN returns upgrades response message or PDP Context deactivation response message, the corresponding IE in amendment response message, sends to VSGSN by amended message afterwards;
Described HGGSN, specifically for: after receiving the request message of GGSN agency transmission, carry out respective handling, and after processing is completed, return PDP Context to GGSN agency and upgrade response message or PDP Context deactivation response message.
13. systems according to claim 10, it is characterized in that, when signaling is PDP Context update request or the PDP Context deactivation request message of the initiation of roamer's belonging area network side, described HGGSN, specifically for: send PDP Context update request message or PDP Context deactivation request message to GGSN agency; And the PDP Context receiving GGSN agency transmission upgrades response message or PDP Context deactivation response message;
Described GGSN agency, specifically for: after receiving the request message of HGGSN transmission, the corresponding IE in modify request messages, sends to VSGSN by amended message afterwards; And receiving after PDP Context that VSGSN returns upgrades response message or PDP Context deactivation response message, the corresponding IE in amendment response message, sends to HGGSN by amended message afterwards;
Described VSGSN, for receiving after GGSN acts on behalf of the request message be sent to, sends PDP Context update request message or PDP Context deactivation request message to roamer; And receiving after PDP Context that roamer returns upgrades response message or PDP Context deactivation response message, returning PDP Context to GGSN agency and upgrading response message or PDP Context deactivation response message;
Described roamer, specifically for: after receiving the request message of VSGSN transmission, return PDP Context to VSGSN and upgrade response message or PDP Context deactivation response message.
14., according to claim 10 to the system described in 13 any one, is characterized in that, described GGSN agency, also for while forwarding signaling and data message, carry out strategy and charging control.
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