CN101730074A - Method for establishing chain connection, service gateway and packet data network gateway - Google Patents
Method for establishing chain connection, service gateway and packet data network gateway Download PDFInfo
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Abstract
The invention discloses a method for establishing chain connection, a service gateway and a packet data network gateway. The method for establishing the chain connection comprises the following steps that: an S-GW receives a routing notice transmitted by a P-GW through an established GTP-U tunnel, resolves and acquires a source link local address of the routing notice; and the S-GW carries the source link local address in a proxy binding acknowledgement message and then transmits the proxy binding acknowledgement message to a trusted non-3GPP access gateway or an ePDG so that the trusted non-3GPP access gateway or the ePDG utilizes the source link local address on a local link between the trusted non-3GPP access gateway or the ePDG and UE to perform local link communication with the UE. Through the method, the requirements on interfaces of the P-GW and the S-GW can be reduced; and simultaneously the cost and implementation complexity can also be reduced.
Description
Technical field
The present invention relates to the mobile communication technology field, relate in particular to a kind of method for establishing chain connection, gateway and packet data network gateway.
Background technology
At present, third generation partner program (3rd Generation Partnership Project, abbreviate 3GPP as) the standardization effort group core network system of just endeavouring to study evolution of future generation be packet-based core networks (the Evolved Packet Core of evolution, abbreviate EPC as), its objective is to the user provides higher transmission rate and shorter transmission delay.
The EPC system supports the access of non-3GPP (non-3GPP) wireless access network.Fig. 1 right and wrong 3GPP wireless access network is by visit public land mobile network (Visited PublicLand Mobile Network, abbreviate VPLMN as) access belonging public land mobile network (Home PLMN, abbreviate HPLMN as) schematic diagram, as shown in Figure 1, the network element that wherein comprises comprises: packet data network gateway (Packet Data Network Gateway, abbreviate P-GW as), be responsible for subscriber equipment (User Equipment, abbreviate UE as) insert the gateway function of PDN (Packet Data Network, Packet Data Network); Home subscriber server (Home Subscriber Server abbreviates HSS as) is positioned at user's home network, is used for forever preserving user contracting data and secure data.
In order to support the non-3GPP Access Network to insert EPC, system also comprises authentication and authorization charging server (Authentication, Authorization and Accounting abbreviate AAA Server as) and authentication and authorization charging agency (AAA Proxy).
The non-3GPP Access Network is not the standardized access technology of 3GPP, wherein, the non-3GPP Access Network comprises: WLAN (wireless local area network) (Wireless Local Area Network, abbreviate WLAN as), worldwide interoperability for microwave inserts (Worldwide Interoperability forMicrowave Access, abbreviate WIMAX as), code division multiple access (Code DivisionMultiple Access abbreviates CDMA as), fixed broadband insert.Particularly, the non-3GPP Access Network can be divided into following two types:
There is trusting relationship in the non-3 GPP access network (Trusted non 3GPP Access) of trusting between 3GPP network and this non-3GPP connecting system, and non-3GPP connecting system can directly insert P-GW by S2a.
Mistrustful non-3 GPP access network (Untrusted non 3GPP Access), there is not trusting relationship between 3GPP network and this non-3GPP Access Network, the non-3GPP connecting system must at first insert packet data gateway (the Evolved PacketData Gateway of the evolution of 3GPP network, abbreviate ePDG as), insert P-GW by the interface S2b between ePDG and the P-GW (S2b is the interface between ePDG and the P-GW) again.In this case, set up a secure tunnel between UE and the ePDG, thereby can guarantee the data transmission security between UE and the 3GPP network.
When being meant the UE roaming, chain type (chained) connected mode, is connected to a kind of connected mode of the P-GW of HPLMN again by the gateway (Serving Gateway abbreviates S-GW as) among the VPLMN by non 3GPP Access.Particularly, Fig. 2 as shown in Figure 2, mainly may further comprise the steps for adopting the flow chart of chain type connected mode:
The chain type connected mode is adopted in step 201:AAA Proxy decision when access authentication of user and mandate, after this connected mode is adopted in AAA Proxy decision, S-GW among VPLMN of AAAProxy selection and the P-GW among the HPLMN, and the non 3GPP Access Network or the ePDG that in verification process, trust are issued in the S-GW and the P-GW address of its selection, the non 3GPP Access Network or the ePDG of trust preserve above-mentioned address;
Step 202: the non 3GPP Access Network of trust or ePDG have Mobile Access Gateway (Mobile Access Gateway, abbreviate MAG as) function, send agent binding update messages (Proxy Binding Update, abbreviate PBU as) to S-GW, wherein, the address that comprises P-GW in this reasonable binding update messages;
Step 203,204:S-GW receive GPRS Tunnel Protocol (GPRS Tunnel Protocol the abbreviates GTP as) tunnel of setting up after the above-mentioned message with P-GW and connect, and comprise the tunnel of user's face (GTP-U) and chain of command (GTP-C);
Step 205: when above-mentioned S-GW be connected with GTP tunnel between the P-GW build up after, S-GW sends proxy binding acknowledgment messages (Proxy Binding Acknowledge, abbreviate PBA as) to MAG, finish the foundation in proxy-mobile IP sixth version between MAG and the S-GW (Proxy Mobile IPv6 abbreviates PMIPv6 as) tunnel;
The configuration information notice UE that step 206:MAG needs UE.
In the PMIPv6 agreement, in order to prevent that UE from conflicting with the link local address (linklocal address) of MAG, local mobile anchor (Local Mobility Anchor, abbreviate LMA as) will be UE distribution interface sign (Interface ID), UE uses this interface identifier to generate link local address; It is the link local address of its distribution that MAG uses LMA.Above-mentioned UE interface identifier and MAG link local address all are to send to MAG by LMA in proxy binding acknowledgment messages (PBA), and the UE interface identifier sends to UE by MAG.
Wherein, link local address is meant the local address that communication is used between the node on the road that connects, on the link beyond this locality, can not use, link is the link between UE and P-GW (having only GTP tunnel between UE and P-GW, when not having the PMIPv6 tunnel) or UE and the MAG (PMIPv6) in above-mentioned flow process.And station address is the IPv6 global address, can be that the whole world is unique or website is unique, just can be used for communication in global communication or the website, and wherein, website is meant carrier network.
In the GTP agreement, P-GW conflicts with the link local address of UE in order to prevent, P-GW will be UE distribution interface sign, and send to UE when the UE initial access network process is finished, and UE uses this interface identifier to generate link local address; It is the IPv6 address prefix of its distribution that P-GW uses advertising of route (Router advertisement) notice UE, and the source address of this advertising of route is the link local address of P-GW.Generate because the link local address of P-GW and the interface identifier of UE are all distributed by P-GW, therefore can guarantee that the link local address of P-GW and UE does not conflict.
In the prior art, when adopting chain type to connect, as shown in Figure 2, P-GW issues S-GW with its link local address in GTP-C message in step 204, S-GW issues MAG (can be that the non-3 GPP access network of trusting closes or ePDG) with this link address in PBA, MAG and UE between this locality connect and use above-mentioned link local address on the road.Because this method needs the GTP-C message in the spread step 204, need to have the interface of supporting GTP-C message between S-GW and the P-GW, therefore, need the expansion existing interface, thereby improved requirement, increased cost and realized complexity S-GW and P-GW interface.
Summary of the invention
In view of this, the invention provides a kind of improved chain type and connect the scheme of setting up, in order to solve in the prior art owing to needing the expansion existing interface to cause cost to increase and realizing complicated problems.
According to an aspect of the present invention, provide a kind of method for establishing chain connection.
Method for establishing chain connection according to the present invention is used for UE and passes through the non-3 GPP access network of trust or the packet data gateway ePDG of evolution when roaming, is connected to the P-GW of HPLMN again by the S-GW of visit net public land mobile network.Determine to use under the situation of chain type connection with the service access HPLMN of UE the authentication and authorization charging agency, method for establishing chain connection according to the present invention comprises: S-GW receives P-GW by the advertising of route that the GTP-U tunnel of setting up sends, and resolves and obtain the source link local address of this advertising of route; S-GW is carried at the non-3 GPP access network that sends to trust in the proxy binding acknowledgment messages with this source link local address and closes or ePDG so that the non-3 GPP access network of trusting closes or ePDG with UE between link-local on use this source link local address to carry out link-local to communicate by letter with UE.
According to another aspect of the present invention, also provide a kind of gateway.
Gateway according to the present invention comprises: receiver module, parsing module and sending module.Wherein, receiver module is used to receive the packet from packet data network gateway, and wherein, this packet comprises advertising of route; Parsing module is used for resolving the advertising of route of the packet that receiver module receives, and obtains the source link local address of this advertising of route; Sending module is used for that above-mentioned source link local address is carried at the non-3 GPP access network that proxy binding acknowledgment messages sends to trust as the link local address of non-3 GPP access network trusty or ePDG and closes or ePDG.
According to a further aspect of the invention, provide a kind of packet data network gateway.
Packet data network gateway according to the present invention comprises: receiver module, set up module and sending module.Wherein, receiver module is used to receive the default bearing request of setting up that gateway sends or receives route requests from S-GW; Set up module, be used to set up GTP user's face tunnel and GTP chain of command tunnel from the packet data network gateway to the gateway; Sending module is used for periodically sending advertising of route or sending advertising of route according to the route requests that receives by GTP user's face tunnel, and sets up the default bearing response by the transmission of GTP chain of command tunnel.
By above-mentioned at least one scheme of the present invention, P-GW receive set up the default bearing request after, do not need to send GTC-C message to S-GW, but send advertising of route to S-GW, S-GW can be by resolving the source link local address of this advertising of route, obtain the link local address on the link-local between MAG (non-3 GPP access network or the ePDG that comprise trust) and the UE, do not need to expand the interface between P-GW and the S-GW, thereby reduced requirement, reduced cost and realized complexity the interface of P-GW and S-GW.
Other features and advantages of the present invention will be set forth in the following description, and, partly from specification, become apparent, perhaps understand by implementing the present invention.Purpose of the present invention and other advantages can realize and obtain by specifically noted structure in the specification of being write, claims and accompanying drawing.
Description of drawings
Accompanying drawing is used to provide further understanding of the present invention, and constitutes the part of specification, is used from explanation the present invention with embodiments of the invention one, is not construed as limiting the invention.In the accompanying drawings:
Fig. 1 uses chain type to connect the Organization Chart that receives EPC by non-3 GPP access network when roaming for user in the correlation technique;
Fig. 2 is the flow chart that uses the chain type connected mode in the correlation technique;
Fig. 3 is the flow chart according to the method for establishing chain connection of the embodiment of the invention;
Fig. 4 is the specific implementation flow chart according to the method for establishing chain connection of the embodiment of the invention;
Fig. 5 is the structural representation according to the gateway of the embodiment of the invention;
Fig. 6 is the structural representation of gateway according to the preferred embodiment of the invention;
Fig. 7 is the structural representation according to the packet data network gateway of the embodiment of the invention.
Embodiment
Functional overview
The embodiment of the invention in the prior art when adopting the chain type connected mode, need link local address be sent to S-GW by GTP-C message, thereby cause S-GW and the bigger problem of P-GW interface influence, propose a kind of improved chain type and connected the scheme of setting up, in embodiments of the present invention, after the default bearing request of setting up that receives the S-GW transmission, P-GW sends advertising of route by the GTP-U that sets up, S-GW receives this advertising of route, resolve and obtain the source link local address of this advertising of route, S-GW closes this source link local address sends to trust in proxy binding acknowledgment messages non-3 GPP access network or ePDG then, and the non-3 GPP access network of trust closes or ePDG carries out link-local as himself link local address with UE with this source link local address and communicates by letter.
Under the situation of not conflicting, embodiment and the feature among the embodiment among the application can make up mutually.
Below in conjunction with accompanying drawing the preferred embodiments of the present invention are described, should be appreciated that preferred embodiment described herein only is used for description and interpretation the present invention, and be not used in qualification the present invention.
According to the embodiment of the invention, a kind of method for establishing chain connection at first is provided, this method is used for UE non-3 GPP access network or ePDG by trusting when roaming, is connected to the P-GW of HPLMN again by the S-GW of VPLMN.
Fig. 3 is the flow chart according to the method for establishing chain connection of the embodiment of the invention, as shown in Figure 3, mainly comprises (step S301-step S303) according to the method for establishing chain connection of the embodiment of the invention:
Step S301:S-GW receives the advertising of route of P-GW by the GTP-U transmission advertising of route of foundation, resolves and obtain the source link local address of this advertising of route;
Step S303:S-GW is carried at the non-3 GPP access network that sends to trust in the proxy binding acknowledgment messages with above-mentioned source link local address and closes or ePDG so that the non-3 GPP access network of trusting closes or ePDG with UE between link-local on use this source link local address to carry out link-local to communicate by letter with UE.
Below further describe above-mentioned each details of handling.
(1) step S301
In specific implementation process, when UE inserts the IP operation that HPLMN provides by the non-3 GPP access network of trusting or ePDG, AAA Proxy is when UE access authentication and mandate, whether decision adopts the chain type connected mode, if the chain type connected mode is adopted in AAA Proxy decision, then AAA Proxy selects S-GW among the VPLMN and the P-GW among the HPLMN, and in verification process, the address of the S-GW of its selection and P-GW is sent to the non-3 GPP access network or the ePDG of trust, the non-3 GPP access network or the ePDG that trust preserve above-mentioned address, and, because the non-3 GPP access network or the ePDG that trust have the MAG function, therefore, non-3 GPP access network of trusting or ePDG send agent binding update messages to the S-GW that selects as MAG, carry the address of selectable above-mentioned P-GW in this agent binding update messages, S-GW sends the default bearing request of setting up to this P-GW after receiving above-mentioned agent binding update messages.
P-GW receives this and sets up after the default bearing request, set up the GTP tunnel (comprising GTP-C and GTP-U) of descending (promptly from P-GW to S-GW), after setting up descending GTP tunnel, P-GW sends to S-GW in the GTP-U tunnel of setting up and sends advertising of route, replys S-GW and set up the default bearing response in the GTP-C tunnel.
In specific implementation process, after setting up GTP-C and GTP-U tunnel, send above-mentioned advertising of route to S-GW and include but not limited to following two kinds of methods:
First kind: P-GW periodically sends advertising of route to S-GW after setting up above-mentioned GTP tunnel;
Second kind: P-GW sends above-mentioned advertising of route to S-GW after the route requests (RouterSolicitation) that receives the S-GW transmission.
Below respectively these two kinds of methods are described.
First method
In the method, P-GW receive from S-GW set up the default bearing request after, periodically send route to S-GW by the descending GTP tunnel of setting up and pass through, this periodicity advertising of route and above-mentioned transmission of setting up the default bearing response do not have sequencing in time.
S-GW is after receiving above-mentioned advertising of route, and to set up the sequencing that default bearing response and periodicity advertising of route receive different according to above-mentioned, may have following two kinds of situations:
First kind of situation, the default bearing of setting up that S-GW receives earlier from P-GW responds, and waits for the periodicity advertising of route that P-GW sends afterwards, after receiving this periodicity advertising of route, resolves and obtain the source link local address in this periodicity advertising of route;
Second kind of situation, S-GW receives periodically advertising of route earlier, and S-GW resolves and obtains the source link local address in this periodicity advertising of route, waits for receiving and sets up the default bearing response.
Second method
In the method, P-GW is after setting up descending GTP tunnel, set up the default bearing response by GTP-C to the S-GW transmission, this sets up the interface identifier that carries UE in the default bearing response, S-GW generates the source link address according to this interface identifier, and sends route requests according to this source link address to P-GW, P-GW sends above-mentioned advertising of route by the GTP-U tunnel of setting up to S-GW after receiving this route requests.
In this method, if S-GW does not receive the above-mentioned advertising of route that P-GW sends in the Preset Time section after sending above-mentioned route requests, then S-GW can send above-mentioned route requests to P-GW once more, P-GW is after receiving this route requests, will be once more send above-mentioned route requests to S-GW, thereby can reduce the unnecessary advertising of route that P-GW periodically sends advertising of route and brought by the GTP-U tunnel of setting up.
For fear of advertising of route UE is exerted an influence, and, because MAG is the couple in router of UE, be responsible for communicating by letter of link-local between UE and the network, the IP address of configuration UE and other parameters, S-GW does not need advertising of route message is issued MAG, therefore, corresponding to the sending method of above-mentioned two kinds of advertising of routes, S-GW can have following two kinds of optimization process modes after receiving advertising of route:
First kind of mode, corresponding to above-mentioned first method, the above-mentioned advertising of route that S-GW will receive is held back, and after getting access to the source link local address, abandon this advertising of route packet, do not issue MAG, and, S-GW can continue to detect the advertising of route that P-GW sends by the GTP-U tunnel, and no longer obtain the source link local address of this advertising of route, abandon the packet of this advertising of route simultaneously, perhaps, S-GW gets access to after the link local address of source, no longer detects the advertising of route that P-GW periodically sends.
The second way, corresponding to above-mentioned second method, S-GW holds back the advertising of route that receives, after getting access to the source link local address, abandon the packet of advertising of route, and no longer send route requests, thereby make P-GW also no longer send advertising of route to S-GW to P-GW.
(2) step S303
In specific implementation process, after the source link local address that gets access to the advertising of route that P-GW sends, S-GW is carried at the non-3 GPP access network of issuing trust in the proxy binding acknowledgment messages with above-mentioned source link local address and closes or ePDG (being MAG).
The non-3 GPP access network of trusting close or ePDG (being MAG) after receiving above-mentioned proxy binding acknowledgment messages, with UE between link-local on use above-mentioned source link local address to carry out link-local with UE to communicate by letter as self link local address.
For further understanding the above-mentioned method for establishing chain connection that the embodiment of the invention provides, sending advertising of route with above-mentioned first method below is example, and the specific implementation process of the method for establishing chain connection that the embodiment of the invention is provided is described.
Fig. 4 is the flow chart according to the method for establishing chain connection specific implementation of the embodiment of the invention, as shown in Figure 4, can realize by following steps according to the method for establishing chain connection of the embodiment of the invention:
Step 401, UE inserts non-3 GPP access network or the ePDG that trusts, to UE authentication and mandate the time, AAA Proxy decision uses chain type to connect, S-GW among VPLMN of AAA Proxy selection and the P-GW among the HPLMN, and the non 3GPP Access or the ePDG that in verification process, trust are issued in the S-GW and the P-GW address of its selection, the non 3GPP Access or the ePDG of trust preserve above-mentioned address;
Step 402, non 3GPP Access that trusts or ePDG (as the MAG that stipulates in the PMIPv6 agreement) send agent binding update messages (being PBU) and give S-GW, wherein, the indication that carries the address of P-GW in this agent binding update messages and between S-GW and P-GW, use GTP;
Behind the agent binding update messages that step 403, the Non 3GPP Access that receives above-mentioned trust or ePDG send, S-GW sends the default bearing request of setting up to P-GW;
Step 404, P-GW reply S-GW and set up the default bearing response in the GTP-C tunnel, and P-GW transmission periodicity advertising of route in the descending GTP-U tunnel of setting up, and this advertising of route is periodically to send, and sends once such as per 10 seconds;
To set up the sequencing that default bearing response and advertising of route periodically receive different according to above-mentioned for step 405, S-GW, and two kinds of dispositions are arranged:
First kind of situation, S-GW receives earlier and sets up the default bearing response, waits for the periodicity advertising of route that P-GW sends afterwards, receives and resolve the packet among the GTP-U, after receiving and be resolved to the periodicity advertising of route, obtain the source link local address in this periodicity advertising of route;
Second kind of situation, S-GW receives periodically advertising of route earlier, and S-GW received and resolved the packet among the GTP-U this moment, after receiving and be resolved to the periodicity advertising of route, obtain the source link local address in the periodicity advertising of route, wait for receiving and sets up the default bearing response message;
When above-mentioned set up default bearing response and periodically advertising of route all receive, and get access to after the source link local address in the periodicity advertising of route, S-GW issues trust with above-mentioned source link local address in proxy binding acknowledgment messages non-3 GPP access network closes or ePDG;
Alternatively, S-GW holds back the advertising of route that receives in this step, after getting access to the source link local address, abandons this advertising of route packet, does not issue MAG;
Preferably, after S-GW gets access to above-mentioned source link local address, no longer resolve the advertising of route that P-GW sends, perhaps be resolved to above-mentioned advertising of route and directly abandon this advertising of route packet afterwards.
Step 406, after finishing above-mentioned tunnel and setting up, the non 3GPP Access of trust or ePDG notice UE finish the IP access procedure of UE about the information of Access Network, the configuration information (as IP address or IP address prefix, interface identifier) that UE needs.
In follow-up access procedure, UE will use the interface identifier that gets access to from MAG to generate link local address on link-local, MAG (i.e. the Non 3GPP Access or the ePDG of Xin Rening) will and UE between link-local on use above-mentioned source link local address that S-GW sends link local address as self, the link local address between UE and the MAG will can not clash.
For adopting above-mentioned second method to send advertising of route, its basic procedure is similar to above-mentioned flow process, the main distinction is if adopt second method to send advertising of route, in above-mentioned steps S404, P-GW only replys to S-GW and sets up the default bearing response, and do not send advertising of route to S-GW, S-GW is setting up after the default bearing response of receiving that P-GW sends, send route requests to P-GW, source link address in this route requests is to be generated by the UE interface identifier of setting up in the default bearing response message, P-GW replys advertising of route after receiving above-mentioned route requests, if S-GW does not receive advertising of route in the section at the fixed time, then S-GW can continue to send route requests to P-GW; S-GW receives and no longer sends route requests after the advertising of route, send advertising of route because P-GW is a route requests according to S-GW, so P-GW also no longer sends advertising of route.And S-GW abandons this advertising of route packet obtain the source link local address from the advertising of route of P-GW transmission after, does not issue MAG, and S-GW is not sending route requests to P-GW, thereby P-GW also no longer sends advertising of route.
According to the embodiment of the invention, also provide a kind of gateway.
Fig. 5 is the structural representation according to the gateway of the embodiment of the invention, as shown in Figure 5, mainly comprises according to the gateway of the embodiment of the invention: receiver module 51, parsing module 53 and sending module 55.Wherein, receiver module 51 is used to receive the packet from packet data network gateway, and wherein, this packet comprises advertising of route; Parsing module 53 is connected with receiver module 51, is used for resolving the advertising of route of the packet that receiver module 51 receives, and obtains the source link local address of this advertising of route; Sending module 55 is connected with parsing module 53, is used for the above-mentioned source link local address that will obtain and is carried at the non-3 GPP access network that proxy binding acknowledgment messages sends to trust as the link local address of non-3 GPP access network trusty or ePDG and closes or ePDG.
Further, above-mentioned receiver module 51 also is used to receive and sets up the default bearing response from the data network gateway.
Further, above-mentioned sending module 55 can also be used for sending route requests to above-mentioned P-GW, and P-GW sends above-mentioned advertising of route with request.
Preferably, as shown in Figure 6, this gateway can also comprise: hold back module 57, be used to hold back the above-mentioned advertising of route that receiver module 51 receives, and after parsing module 53 gets access to above-mentioned source link local address, abandon the packet of this advertising of route.
According to the embodiment of the invention, also provide a kind of packet data network gateway.
Fig. 7 is the structural representation according to the packet data network gateway of the embodiment of the invention, as shown in Figure 7, mainly comprises according to the packet data network gateway of the embodiment of the invention: receiver module 71, set up module 73 and sending module 75.Wherein, receiver module 71 is used to receive the default bearing request of setting up that gateway sends or receives route requests from S-GW; Set up module 73 and be connected, be used to set up GTP-U tunnel and GTP-C tunnel from the packet data network gateway to the gateway with receiver module 71; Sending module 75 with set up module 73 and be connected, be used for periodically sending advertising of route by the GTP-U tunnel, perhaps send advertising of route, and send by the GTP-C tunnel and to set up the default bearing response according to the above-mentioned route requests that receives.
As mentioned above, the technical scheme that provides by the embodiment of the invention, P-GW receive set up the default bearing request after, do not need to send GTC-C message to S-GW, but send periodically advertising of route to S-GW, S-GW can be by resolving this periodically source link local address of advertising of route, obtain the link local address on the link-local between MAG (non-3 GPP access network or the ePDG that comprise trust) and the UE, do not need to expand the interface between P-GW and the S-GW, thereby reduced requirement, reduced cost and realized complexity the interface of P-GW and S-GW.And, in embodiments of the present invention, when setting up after the default bearing response that S-GW receives that P-GW sends, S-GW sends route requests to P-GW, source link address in this route requests is to be generated by the UE interface identifier of setting up in the default bearing response message, P-GW replys advertising of route after receiving above-mentioned route requests, if S-GW does not receive advertising of route, can continue to send route requests to P-GW; S-GW no longer sends route requests after receiving advertising of route, and P-GW also no longer needs to have sent advertising of route, has reduced P-GW and has periodically sent the unnecessary advertising of route that advertising of route brings.
The above is the preferred embodiments of the present invention only, is not limited to the present invention, and for a person skilled in the art, the present invention can have various changes and variation.Within the spirit and principles in the present invention all, any modification of being done, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (13)
1. method for establishing chain connection, be used for user equipment (UE) and when roaming, pass through the non-3 GPP access network of trust or the packet data gateway ePDG of evolution, be connected to the packet data network gateway P-GW of Home Public Land Mobile Network network HPLMN again by the gateway S-GW of visit net public land mobile network, it is characterized in that, determine to use under the situation of chain type connection with the service access HPLMN of described UE the authentication and authorization charging agency, described method comprises:
Described S-GW receives described P-GW by the advertising of route that the GPRS Tunnel Protocol user face GTP-U tunnel of setting up sends, and resolves and obtain the source link local address of described advertising of route;
Described S-GW is carried at the non-3 GPP access network that sends to trust in the proxy binding acknowledgment messages with described source link local address and closes or ePDG so that the non-3 GPP access network of trusting closes or ePDG with described UE between link-local on use described source link local address to carry out link-local to communicate by letter with described UE.
2. method according to claim 1 is characterized in that, before described S-GW received described advertising of route, described method also comprised:
Receiving the default bearing request of setting up that described S-GW sends, after the GTP chain of command GTP-C tunnel and described GTP-U tunnel of foundation from described P-GW to S-GW, described P-GW periodically sends described advertising of route to described S-GW by described GTP user's face tunnel.
3. method according to claim 2 is characterized in that, before described S-GW sent described proxy binding acknowledgment messages, described method also comprised:
Described S-GW receives the described default bearing response of setting up.
4. method according to claim 2 is characterized in that, after described S-GW received described advertising of route, described method can also comprise:
The described advertising of route that described S-GW will receive is held back, after getting access to described source link local address, abandon the packet of described advertising of route, and, described S-GW continues to detect the advertising of route that described P-GW sends by the GTP-U tunnel, and abandons the packet of this advertising of route; Perhaps,
Described S-GW gets access to after the link local address of described source, no longer detects the advertising of route that described P-GW periodically sends.
5. method according to claim 1 is characterized in that, before described S-GW received described advertising of route, described method also comprised:
Receiving the default bearing request of setting up that described S-GW sends, after the GTP-C tunnel and described GTP-U tunnel of foundation from described P-GW to S-GW, described P-GW sends to described S-GW by described GTP-C tunnel and sets up the default bearing response, wherein, the described interface identifier that carries described UE in the default bearing response of setting up;
Described S-GW generates the source link address according to described interface identifier, and sends route requests according to described source link address to described P-GW;
Described P-GW receives described route requests, sends described advertising of route by described GTP-U tunnel to described S-GW.
6. method according to claim 5 is characterized in that, after described P-GW sent described advertising of route, if described S-GW does not receive described advertising of route, then described method also comprised:
Described S-GW sends described route requests to described P-GW once more according to described source link address.
7. method according to claim 5 is characterized in that, after described S-GW received described advertising of route, described method also comprised:
The described advertising of route that described S-GW will receive is held back, and after getting access to described source link local address, abandons the packet of described advertising of route, and no longer sends described route requests to described P-GW.
8. according to each described method in the claim 1 to 7, it is characterized in that after described S-GW sent described proxy binding acknowledgment messages, described method also comprised: described non-3 GPP access network close or ePDG and described UE between this locality
Using described source link local address to carry out link-local with described UE on the link communicates by letter.
9. a gateway is characterized in that, comprising:
Receiver module is used to receive the packet from packet data network gateway, and wherein, described packet comprises advertising of route;
Parsing module is used for resolving the described advertising of route of the described packet that described receiver module receives, and obtains the source link local address of described advertising of route;
Sending module is used for that described source link local address is carried at the non-3 GPP access network that proxy binding acknowledgment messages sends to described trust as the link local address of non-3 GPP access network trusty or ePDG and closes or described ePDG.
10. gateway according to claim 9 is characterized in that,
Described receiver module is used to also to receive that described data network gateway sends sets up the default bearing response.
11. gateway according to claim 10 is characterized in that,
Described sending module also is used for sending route requests to described P-GW, sends described advertising of route to ask described P-GW.
12. gateway according to claim 9 is characterized in that, described gateway also comprises:
Hold back module, be used to hold back the described advertising of route that described receiver module receives, and after described parsing module obtains described source link local address, abandon the packet of described advertising of route.
13. a packet data network gateway is characterized in that, comprising:
Receiver module is used to receive the default bearing request of setting up that gateway sends or receives route requests from S-GW;
Set up module, be used to set up GTP user's face tunnel and GTP chain of command tunnel from described packet data network gateway to described gateway;
Sending module is used for periodically sending advertising of route or sending advertising of route according to the described route requests that receives by described GTP user's face tunnel, and sets up the default bearing response by the transmission of described GTP chain of command tunnel.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009101372462A CN101730074B (en) | 2009-04-28 | 2009-04-28 | Method for establishing chain connection, service gateway and packet data network gateway |
| PCT/CN2009/073646 WO2010124486A1 (en) | 2009-04-28 | 2009-08-31 | Method for establishing chained connection, serving gateway and packet data network gateway |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2009101372462A CN101730074B (en) | 2009-04-28 | 2009-04-28 | Method for establishing chain connection, service gateway and packet data network gateway |
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| CN101730074B CN101730074B (en) | 2013-01-16 |
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| CN2009101372462A Expired - Fee Related CN101730074B (en) | 2009-04-28 | 2009-04-28 | Method for establishing chain connection, service gateway and packet data network gateway |
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| WO (1) | WO2010124486A1 (en) |
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| Publication number | Publication date |
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| WO2010124486A1 (en) | 2010-11-04 |
| CN101730074B (en) | 2013-01-16 |
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