CN102036217B - Method and system for building multiple mobile sessions in proxy mobile IP system - Google Patents
Method and system for building multiple mobile sessions in proxy mobile IP system Download PDFInfo
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- CN102036217B CN102036217B CN200910110721.7A CN200910110721A CN102036217B CN 102036217 B CN102036217 B CN 102036217B CN 200910110721 A CN200910110721 A CN 200910110721A CN 102036217 B CN102036217 B CN 102036217B
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Abstract
The invention provides a method, device and equipment for building multiple mobile sessions in a proxy mobile IP system. Mobile session connection information of a mobile node is obtained when the mobile node moves to a second mobile access gateway from a first mobile access gateway, the connection information comprises service information to which the mobile session belongs and a mobile session connection identification; the mobile session with a local mobile anchor point is built according to the mobile session connection information, and a home network prefix to which the mobile session ofthe mobile node belongs is obtained from the local mobile anchor point, the home network prefix is transmitted to the mobile node, so as to solve the problem that as the home network prefix to which the mobile session corresponding to the mobile node belongs can not be obtained, the service of multi-connection session of the MN (mobile node) is interrupted after the mobile node which supports multiple mobile sessions is accessed to different network environments, so as to realize multi-connection service of the mobile node in different access environments and improve the experience degree of users.
Description
Technical field
The present invention relates to the network communications technology of the communications field, specifically refer to set up in a kind of proxy mobile IP system the method and system of a plurality of mobile sessions.
Background technology
Proxy mobile IPv 6 (being PMIPv6) agreement has more widely in the network system that World Interoperability for Microwave Access, WiMax WiMAX network, third generation partner program 3GPP System Architecture Evolution (SAE, System Architecture Evolution) network and 3GPP network and WiMAX network interconnect to be used.Usually, the basic framework of PMIP6 protocol system comprises:
Authentication and authorization charging aaa server: provide access authentication, mandate in startup (bootstrapping) process for the MN access network.Usually, as in 3GPP System Architecture Evolution (SAE) network, if the local subscribed services device HSS of aaa server and store M N CAMEL-Subscription-Information coexistence under the situation of separating, exists between aaa server and the HSS and communicates by letter, and can obtain the CAMEL-Subscription-Information of MN etc.
Dynamic host configuration protocol DHCP server: be used to MN to be assigned state address etc. alternatively.Under different scenes, may coexist with Mobile Access Gateway MAG or local mobile anchor LMA, or individualism.
Mobile node MN, peer node CN are the communication nodes of a pair of end-to-end service application, the network equipments such as counterpart terminal or server.
Mobile Access Gateway MAG and local mobile anchor LMA are the basic network elements of PMIP protocol system.In different network systems, usually they lay respectively on IAD and the core net gateway.For example: at the WiMAX network, MAG is positioned at the ASN-GW(ASN GateWay of ASN (Access Services Network accessing business network) network, accessing business network gate) on; And LMA is located among the CSN (the connective service network of Connectivity Services Network also is core net), with HA (Home Agent, home agent) coexistence or individualism etc.; And for example at the block core (EPC of the evolution of 3GPP SAE (System Architecture Evolution System Architecture Evolution) network, Evolved Packet Core) in, MAG is positioned at SGW(Serving Gateway, gateway) go up or IAD that non-3GPP inserts on (packet data gateway (the EPDG of the evolution that inserts as WLAN, Evolved Packet Data Gateway), and LMA is positioned on the packet data network gateway (PDN-GW, Packet Data Network GateWay).In different scenes, Mobile Access Gateway can coexist with dhcp relay agent, also can coexist with Dynamic Host Configuration Protocol server.
In the prior art, when mobile node MN is passed through article one tunnel, when first connection is set up in request, Mobile Access Gateway MAG sends to local mobile anchor and connects the request of foundation, after local mobile anchor was accepted to connect and was set up this moment, reply connection establishment response message to Mobile Access Gateway, have the home network prefix HNP1 that distributes to MN in the wherein said connection establishment response message, Mobile Access Gateway sends HNP1 to MN at the L2 of correspondence link.Similarly, MN sets up second connection, is assigned with HNP2.
In realizing process of the present invention, the inventor finds that there are the following problems at least in the prior art:
Along with the mobile node MN increased functionality, MN supports the many interfaces of multimode, namely supports a plurality of mobile sessions or multi-link for supporting.A plurality of mobile sessions or multi-link referring to are supported a plurality of IP sessions at an interface, and perhaps a plurality of interfaces are supported one or more IP sessions respectively.Based on above-mentioned basic PMIPv6 agreement, there is the connection of a plurality of HNP address prefix correspondences in the multi-link binding that also namely means MN, perhaps there is different connections in a plurality of bindings.
Support multi-link MN to move second Mobile Access Gateway from first Mobile Access Gateway, because during the application of PMIPv6 in different access network environments, when second Mobile Access Gateway replaces MN to carry out mobile session connection one by one setting up, because second Mobile Access Gateway does not have the mobile session connection sign of mobile node, local mobile anchor LMA can not determine the mobile session connection of MN correspondence, also namely can not distribute the home network prefix HNP of MN correspondence to give corresponding mobile session connection, thereby make the switch-in attribute of each connection of MN change, corresponding connection quality of service also changes, further have influence on business experience, even interrupt.For example the first Mobile Access Gateway MAG1 is 3GPP, second Mobile Access Gateway is WLAN, when MN from MAG1(3GPP) move to MAG2(WLAN) when inserting, owing to also there not be the realization of connection at present in the wlan network, MN can't send home network prefix to MAG2 by signaling; And still can not support context transfer well between the MAG1 between heterogeneous network (3GPP and WLAN) and the MAG2, this will make MAG2 to get access to the home network prefix HNP of MN correspondence to corresponding session connection from MAG1, can't guarantee the continuity of the multi-link session of MN, cause professional the interruption, influence business experience.
Summary of the invention
In view of this, the main purpose of the embodiment of the invention is to provide method, the Apparatus and system of setting up a plurality of mobile sessions in a kind of proxy mobile IP system, after having solved the mobile node of supporting a plurality of mobile sessions in the proxy mobile IP system and inserting different network environments, owing to can't obtain the home network prefix of MN correspondence, cause the business of the multi-link session of MN to be interrupted, influence the problem that the user experiences.
For achieving the above object, the embodiment of the invention provides following technical scheme:
Set up the method for a plurality of mobile sessions in a kind of proxy mobile IP system that the embodiment of the invention provides, described method comprises: when mobile node moves to second Mobile Access Gateway from first Mobile Access Gateway, described second Mobile Access Gateway obtains the mobile session connection information of described mobile node, and described mobile session connection information comprises: the business information under the mobile session and mobile session connection sign; Described second Mobile Access Gateway is according to described mobile session connection information, set up and local mobile anchor between mobile session; Wherein, described first Mobile Access Gateway lays respectively at different inserting technology networks with described second Mobile Access Gateway; Described second Mobile Access Gateway according to described foundation and local mobile anchor between mobile session, obtain the home network prefix under the mobile session of described mobile node from described local mobile anchor; And described home network prefix sent to described mobile node;
Before described mobile node moves to second mobile access network from first Mobile Access Gateway, also comprise:
Described mobile node is attached to described first Mobile Access Gateway, sets up mobile session to the described first Mobile Access Gateway request; Described first Mobile Access Gateway is created the connection data field of described mobile node, and sends mobile conversation request message to described local mobile anchor, comprises the described mobile session connection information of described mobile node in the described mobile conversation request message;
After described local mobile anchor receives described mobile conversation request message, generate authentication and authorization charging AAA request message, carry described mobile session connection information in the described AAA request message; Mandate connects if aaa server is according to described AAA request message, and described aaa server returns to described local mobile anchor and connects license confirmation message, and preserves described mobile session connection information;
After described local mobile anchor is received described connection license confirmation message, for described mobile node distributes described home network prefix, preserve the corresponding relation of described home network prefix and described mobile session connection information, and return mobile session to described first Mobile Access Gateway and set up acknowledge message, described mobile session is set up and is carried described home network prefix in the acknowledge message; Described first Mobile Access Gateway sends to mobile node with described home network prefix after receiving that acknowledge message is set up in described mobile session;
The described mobile session connection information of obtaining described mobile node is specially: the mobile session connection information of obtaining described mobile node from aaa server.
Set up the system of a plurality of mobile sessions in a kind of proxy mobile IP system that the embodiment of the invention provides, described system comprises: first Mobile Access Gateway, second Mobile Access Gateway, local mobile anchor and aaa server, wherein said first Mobile Access Gateway lays respectively at different inserting technology networks with described second Mobile Access Gateway;
Described second Mobile Access Gateway, be used for when mobile node moves to described second Mobile Access Gateway from described first Mobile Access Gateway, obtain the mobile session connection information of described mobile node from described aaa server, described link information comprises: the business information under the mobile session and mobile session connection sign; According to described mobile session connection information, the mobile session between foundation and the described local mobile anchor; And according to described foundation and local mobile anchor between mobile session, obtain the home network prefix under the mobile session of described mobile node from described local mobile anchor; And described home network prefix sent to described mobile node;
Described local mobile anchor is used for the mobile session of setting up according to described second Mobile Access Gateway, sends home network prefix under the mobile session of described mobile node to described second Mobile Access Gateway;
Described first Mobile Access Gateway, be used for before mobile node moves to second Mobile Access Gateway from first Mobile Access Gateway, receive described mobile node and set up the request message of mobile session, create the connection data field of described mobile node, and send mobile conversation request message to described local mobile anchor, comprise the described mobile session connection information of described mobile node in the described mobile conversation request message;
Described local mobile anchor also is used for receiving the described mobile conversation request message that described first Mobile Access Gateway sends, and generates authentication and authorization charging AAA request message, carries described mobile session connection information in the described AAA request message;
Described aaa server is used for judging whether that according to described AAA request message mandate connects; Connect if authorize, then return connection license confirmation message to described local mobile anchor, and preserve described mobile session connection information;
Described local mobile anchor, also be used for after receiving the described connection license confirmation message that described aaa server sends, for described mobile node distributes described home network prefix, preserve the corresponding relation of described home network prefix and described mobile session connection information, and return mobile session to described first Mobile Access Gateway and set up acknowledge message, described mobile session is set up and is carried described home network prefix in the acknowledge message;
Described first Mobile Access Gateway, acknowledge message is set up in the described mobile session that also is used for the described local mobile anchor transmission of reception, and described home network prefix is sent to mobile node.
The specific embodiments that is provided by the embodiment of the invention described above as can be seen, when mobile node moves to second Mobile Access Gateway from first Mobile Access Gateway, obtain the mobile session connection information of described mobile node, described link information comprises: the business information under the mobile session and mobile session connection sign; According to described mobile session connection information, mobile session between foundation and the local mobile anchor, and obtain home network prefix under the mobile session of described mobile node from described local mobile anchor, described home network prefix is sent to described mobile node, after having solved the different network environment of the mobile node access of supporting how mobile session, owing to can't obtain the affiliated home network prefix of the mobile session of mobile node correspondence, the problem that causes the business of the multi-link session of MN take place to be interrupted, realized that mobile node inserts the multi-link business of realization in the environment in difference, has improved user's experience degree.
Description of drawings
Fig. 1 is for the method flow diagram of a plurality of mobile sessions is provided in a kind of proxy mobile IP system that provides in the embodiment of the invention;
Fig. 2 is for the specific implementation flow chart of a plurality of mobile sessions is provided in a kind of proxy mobile IP system that provides in the embodiment of the invention;
Fig. 3 is for the initial establishment stage specific implementation flow chart of a plurality of mobile sessions is provided in the another kind of proxy mobile IP system that provides in the embodiment of the invention;
Fig. 4 is for the stage that the rebulids specific implementation flow chart of a plurality of mobile sessions is provided in the another kind of proxy mobile IP system that provides in the embodiment of the invention;
Fig. 5 is for the specific implementation flow chart of a plurality of mobile sessions is provided in another a kind of proxy mobile IP system that provides in the embodiment of the invention;
Fig. 6 is for the apparatus structure schematic diagram of a plurality of mobile sessions is provided in a kind of proxy mobile IP system that provides in the embodiment of the invention;
Fig. 7 is for the system configuration schematic diagram of a plurality of mobile sessions is provided in a kind of proxy mobile IP system that provides in the embodiment of the invention.
Embodiment
For making the purpose, technical solutions and advantages of the present invention clearer, below in conjunction with accompanying drawing embodiments of the invention are described in further detail.
Should be clear and definite, described embodiment only is the present invention's part embodiment, rather than whole embodiment.Based on the embodiment among the present invention, those of ordinary skills belong to the scope of protection of the invention not making the every other embodiment that obtains under the creative work prerequisite.
As shown in Figure 1, a kind of method flow diagram of realizing multi-link business of Fig. 1 for providing in the embodiment of the invention, described method comprises:
Step S100, when mobile node moves to second Mobile Access Gateway from first Mobile Access Gateway, obtain the mobile session connection information of described mobile node, described link information comprises: the business information under the mobile session and mobile session connection sign; First Mobile Access Gateway lays respectively at different inserting technology networks with second Mobile Access Gateway.
Be specially: this method is applicable to that described MAG1 and MAG2 belong to heterogeneous network, namely belong to networks of different type for example MAG1 and MAG2 be respectively 3GPP network or wlan network, perhaps but MAG1 and MAG2 belong to same type network situation that can't direct communication.
Described mobile node MN is supported the many interfaces of multimode, namely supports multi-linkly, perhaps supports a plurality of mobile sessions.Many mobile sessions refer to support a plurality of IP sessions at an interface that perhaps a plurality of interfaces are supported one or more IP sessions respectively.Based on above-mentioned basic PMIPv6 agreement, a plurality of mobile sessions also namely mean the connection that has a plurality of HNP address prefix correspondences in the binding of MN, perhaps have different connections in a plurality of bindings.
Also comprised before step S100: receive the session connection request message that mobile node sends, described request message comprises: dynamic host allocation protocol DHCP request message or route request information.
Described mobile session connection request message can also comprise: the mobile session connection information of described mobile node.
Step S102, according to described mobile session connection information, set up and local mobile anchor between mobile session.
Step S104, according to described foundation and local mobile anchor between mobile session, obtain the home network prefix under the mobile session of described mobile node from described local mobile anchor; And described home network prefix sent to described mobile node.
The mobile session connection information that described second Mobile Access Gateway obtains described mobile node is specially: obtain the mobile session connection information of described mobile node from the mobile session connection request message that mobile node sends, perhaps obtain the mobile session connection information of described mobile node from aaa server.
The specific embodiments that is provided by the embodiment of the invention described above as can be seen, when mobile node moves to second Mobile Access Gateway from first Mobile Access Gateway, obtain the mobile session connection information of described mobile node, described link information comprises: the business information under the mobile session and mobile session connection sign; According to described mobile session connection information, mobile session between foundation and the local mobile anchor, and obtain home network prefix under the mobile session of described mobile node from described local mobile anchor, described home network prefix is sent to described mobile node, after having solved the different network environment of the mobile node access of supporting how mobile session, owing to can't obtain the affiliated home network prefix of the mobile session of mobile node correspondence, the problem that causes the business of the multi-link session of MN take place to be interrupted, realized that mobile node inserts the multi-link business of realization in the environment in difference, has improved user's experience degree.
See also Fig. 2, a kind of specific implementation flow chart of realizing multi-link business of Fig. 2 for providing in the embodiment of the invention.
Present embodiment is described the method based on the connection management of IP layer expansion, and key is that the mobile node request connects foundation, and the connection identifier that comprises in the link information of each connection is created/distributed by mobile node; After connecting foundation, the last connection table that will set up a plurality of connections of user also namely carries out connection management.When user's access service, according to type of service and professional qos requirement etc., suitable connection will be selected and provide to connection management.This implementation method is irrelevant with concrete access link, thereby may be used in the different access networks.
When step S200, mobile node are linked into the second Mobile Access Gateway MAG2 from the first Mobile Access Gateway MAG1, the access authentication success, mobile node is authorized to visit the business of the second Mobile Access Gateway MAG2.
Wherein, first Mobile Access Gateway lays respectively at different inserting technology networks with second Mobile Access Gateway.
Step S202, mobile node send mobile session connection request message to the second Mobile Access Gateway MAG2, carry described session connection information in the wherein said request; Described mobile session connection information comprises: mobile session connection sign, the business information APN under the mobile session;
Described request message comprises: dynamic host allocation protocol DHCP request message or route request information.
Wherein, described DHCP request is carried described mobile session connection information by scaling option, comprises business information under mobile session connection sign and the mobile session etc., sets up PMIP between Mobile Access Gateway and local mobile anchor and is connected thereby trigger.
The relevant option of the described mobile session connection information that has in the DHCP request comprises: the business information under mobile session connection sign and the mobile session, and wherein mobile session connection sign option comprises: type, length and connection identifier; It is connection identifier that type is indicated this option, and length is the length of connection identifier, and connection identifier is random number, is used for sign and connects; Business information option APN under the session connection comprises: type, length and connection business information; Type indicates this option professional for connecting, and length is for connecting professional length, and connecting business information can represent for domain name or other forms, is used for the type of service that sign connects.
When described request message is route request information, be this request message when being based on neighbours and finding the ND agreement, described route request information is also passed through scaling option, carry described mobile session connection information, be implemented as follows: at first be in the flag bit of route request information, to have indication information, for example: wherein whether C bit indication route request information comprises mobile session connection information, comprises link information when C is 1, is not comprise in 0 o'clock.When above-mentioned C is 1, when also namely indication has mobile session connection information, the described mobile session connection information of expansion in the option parameter of route request information then, wherein said session connection information option comprises: type, length and connection identifier; It is the link information option that type is indicated this option, and length is connection identifier and be connected business information length, and connection identifier is random number, is used for sign and connects, connect business information for or other forms represent, be used for the type of service that sign connects.
Also can increase the option of the home network prefix of distributing to each connection of user in the scaling option of described request message.
Step S204, second Mobile Access Gateway receive described mobile session connection request message, obtain the mobile session connection information of described mobile node, described mobile session connection request message is sent to LMA, comprise in the wherein said request message: described mobile session connection information.
Be specially, after second Mobile Access Gateway receives described mobile session connection request message, triggering sends mobile session connection request message to local mobile anchor LMA, described mobile session connection request message is agent binding update messages PBU, comprises mobile session connection information in the wherein said PBU request message.
Described second Mobile Access Gateway comprises the function of dhcp relay agent or Dynamic Host Configuration Protocol server.After receiving described request message, propose link information, handled by the PMIP module on the Mobile Access Gateway.
Comprise mobile session connection information (comprise under mobile session connection sign, the mobile session business information etc.) in the wherein said request message, can also comprise user's identification information (for example network access Identifier NAI).
After step S206, local mobile anchor receive described request, be defined as described mobile node and set up session connection, and return mobile session and set up acknowledge message, described mobile session is set up and is carried the affiliated home network prefix of the mobile session of distributing to mobile node in the acknowledge message.
Acknowledge message is set up in described mobile session can be proxy binding acknowledgment messages PBA; Carry the affiliated home network prefix of the mobile session of distributing to mobile node in the described PBA message, can also comprise the link information of mobile node.
Be specially: described local mobile anchor is according to the session connection information of carrying in the described acknowledge message, search and described mobile session connection sign of carrying, home network prefix with business information corresponding mobile node under the described mobile session, and the link information that can also comprise the mobile subscriber, and return described acknowledge message and give described second Mobile Access Gateway.
Step S208, second Mobile Access Gateway are according to described mobile session connection information, determine to set up and local mobile anchor between mobile session, and from the mobile session acknowledge message that described local mobile anchor returns, obtain home network prefix under the mobile session of described mobile node.
Described second Mobile Access Gateway obtains the home network prefix of distributing to the user from described acknowledge message after, upgrade and preserve the binding clauses and subclauses BCE of mobile node; The binding clauses and subclauses of wherein said mobile node comprise: mobile session connection information and the home network prefix corresponding with described session connection information, namely second Mobile Access Gateway is created the connection data field of mobile node, can also comprise and mobile session under business information between corresponding relation.
Step S210, described second Mobile Access Gateway are carried at the home network prefix under the mobile session of described mobile node in the connection establishment response message and return to mobile node.
If the session connection request message that described second Mobile Access Gateway receives is dhcp message, then the home network prefix of the described mobile node that will obtain is carried at and returns to mobile node in the dhcp message; If the session connection request message that described second Mobile Access Gateway receives is route request information, then the home network prefix of the described mobile node that will obtain is carried among the route announcement message RA and returns to mobile node.
The specific embodiments that is provided by the embodiment of the invention described above as can be seen, when described mobile node moves success when being attached to second Mobile Access Gateway from first Mobile Access Gateway, from the session connection request message that mobile node sends, obtain the mobile session connection information of described mobile node by second Mobile Access Gateway, according to described mobile session connection information, mobile session between foundation and the local mobile anchor, and obtain home network prefix under the mobile session of described mobile node from described local mobile anchor, described home network prefix is sent to described mobile node, after having solved the different network environment of the mobile node access of supporting how mobile session, owing to can't obtain the affiliated home network prefix of the mobile session of mobile node correspondence, the problem that causes the business of the multi-link session of MN take place to be interrupted, realized that mobile node inserts the multi-link business of realization in the environment in difference, has improved user's experience degree.
See also Fig. 3 and Fig. 4, Fig. 3 is provided for the another kind that provides in the embodiment of the invention by specific implementation flow chart before the switching of multi-link business; Fig. 4 is provided for the another kind that provides in the embodiment of the invention by specific implementation flow chart after the switching of multi-link business.
Present embodiment is described based on the method for aaa server to the connection management of multi-link service authorization expansion, key is the aaa server establishment or has preserved the link information of each connection of user, and each connect is set up authorize, or all are connected unified the mandate.This implementation method is irrelevant with concrete access link, thereby may be used in the different access networks.Specific implementation comprises following two part: Fig. 3 and Fig. 4.
Specifically describe below in conjunction with Fig. 3:
Step S300, mobile node are attached to the first Mobile Access Gateway MAG1, and the access authentication success is authorized to the accesses network business.
Step S301, mobile node send mobile conversation request message, and mobile session is set up in request.
The connection data field that step S302, first Mobile Access Gateway are created mobile node, be also referred to as binding clauses and subclauses BCE etc., and sending mobile conversation request message to local mobile anchor, wherein said mobile session connection request message comprises the mobile session connection information of described mobile node.
Described request message can be agent binding update PBU message.Described mobile session connection information comprises the business information under mobile session connection sign and the mobile session; The identification information (for example network access Identifier NAI) that can also comprise mobile node.
After step S304, local mobile anchor receive described request message, generate the AAA request message, with the request aaa server service authorization is carried out in the connection of MN and handle, will carry described mobile session connection information in the described AAA request message.
Can also comprise the mobile node MN sign in the described request message.
Step S306, aaa server check the service profile (being kept in the policy configurations of MN) of mobile node, determine whether to authorize to connect.If authorize, then the return authorization result is successfully, preserves the mobile session connection information of this connection simultaneously, and returns the service parameter of this connection, for example QoS etc.
Step S308, when aaa server return connect license confirmation message after, local mobile anchor is distributed to the home network prefix under the mobile session of mobile node, and returns to connect to first Mobile Access Gateway and set up acknowledge message.
Step S310, described first Mobile Access Gateway send to mobile node with described home network prefix after receiving and connecting acknowledge message.
Wherein, need expand AAA message, realize new attribute to carry the mobile session connection information of mobile node, comprise business information under mobile session connection sign and the mobile session etc.Wherein, AAA message comprises Diameter or Radius agreement.Its scaling option can with reference among Fig. 2 to the expansion of dhcp message and route request information.
When described mobile node MN moves to the second IAD MAG2 from the first Mobile Access Gateway MAG1, be described again below in conjunction with Fig. 4:
Step S400, when described mobile node moves to the second Mobile Access Gateway MAG2 from the first Mobile Access Gateway MAG1, access authentication success, mobile node is authorized to visit the business of the second Mobile Access Gateway MAG2.
Wherein, described first Mobile Access Gateway lays respectively at different inserting technology networks with described second Mobile Access Gateway.
When the verification process that step S402, mobile node insert the described second Mobile Access Gateway MAG2 is finished, the described second mobile access network MAG2 comprises mobile session connection sign and the affiliated business information of mobile session from the mobile session connection information of described aaa server reception mobile node.
Wherein, after the described second Mobile Access Gateway MAG2 receives described mobile session connection information, described mobile session connection information is preserved.
Step S404, mobile node send mobile conversation request message to the second Mobile Access Gateway MAG2.
Concrete session connection request message also comprise describe among the step S202 in above-described embodiment comprise DHCP request message or route request information, unique difference part is, do not carry described session connection information in this request message, session connection information among this embodiment is obtained this session connection information from aaa server when MN is linked into the MAG2 authentication success.
Step S406, second Mobile Access Gateway receive described mobile conversation request message, and described request message is sent to local mobile anchor LMA, comprise mobile session connection information in the wherein said request message.
Wherein, the described mobile conversation request message that sends to LMA can be agent binding update PBU message.
Described second Mobile Access Gateway comprises the function of dhcp relay agent or Dynamic Host Configuration Protocol server.After receiving request message, propose link information, handled by the PMIP module on the Mobile Access Gateway.
Comprise mobile session connection information (comprise connection identifier, connect affiliated business information etc.) in the wherein said request message, can also comprise user's identification information (for example network access Identifier NAI).
After step S408, local mobile anchor receive described request, be defined as described mobile node and set up session connection, and return mobile session and set up acknowledge message, described mobile session is set up and is carried the affiliated home network prefix of the mobile session of distributing to mobile node in the acknowledge message.
Acknowledge message is set up in described mobile session can be proxy binding acknowledgment messages PBA; Carry the affiliated home network prefix of the mobile session of distributing to mobile node in the described PBA message, can also comprise the link information of mobile node.
Be specially: described local mobile anchor is according to the session connection information of carrying in the described acknowledge message, search and described mobile session connection sign of carrying, home network prefix with business information corresponding mobile node under the described mobile session, and the link information that can also comprise the user, and return described acknowledge message and give described second Mobile Access Gateway.
Step S410, second Mobile Access Gateway are according to described mobile session connection information, mobile session between foundation and the local mobile anchor, and according to described foundation and local mobile anchor between mobile session, from the mobile session acknowledge message that described local mobile anchor returns, obtain the home network prefix under the mobile session of described mobile node.
Step S412, described second Mobile Access Gateway send to described mobile node with described home network prefix.
Described second Mobile Access Gateway obtains the home network prefix of distributing to the user from described acknowledge message after, upgrade and preserve the binding clauses and subclauses BCE of mobile node; The binding clauses and subclauses of wherein said mobile node comprise: mobile session connection information and the home network prefix corresponding with described session connection information, namely second Mobile Access Gateway is created the connection data field of mobile node, can also comprise and mobile session under business information between corresponding relation.
Need to prove, Fig. 3 and Fig. 4 have replacement scheme, its main distinction point is: in the described embodiment of Fig. 3, mobile session connection sign in the described mobile session connection information dynamically writes, and the described mobile session connection sign in the replacement scheme also is to be pre-created by aaa server, and the difference on the idiographic flow is:
MAG1 obtains in the Certificate Authority result of MN from aaa server in the step 300 of Fig. 3, and the aaa server of MN has also returned the mobile session connection information of mobile node to MAG1, comprises the affiliated business information of mobile session connection sign and mobile session.
For the step 304-306 of Fig. 3, LMA still asks aaa server that the connection foundation of MN is authorized alternatively, and difference is that aaa server does not need to preserve the link information of upgrading MN.
When moving, MN switches to the second IAD MAG2, step 402 as shown in Figure 4, and this moment, the link information of the MN that obtains of link information and former MAG1 of the MN that MAG2 obtains from the aaa server of MN was consistent.
The specific embodiments that is provided by the embodiment of the invention described above as can be seen, when described mobile node moves to second Mobile Access Gateway from first Mobile Access Gateway, described second Mobile Access Gateway obtains described mobile session connection information from aaa server, according to described mobile session connection information, mobile session between foundation and the local mobile anchor, and obtain home network prefix under the mobile session of described mobile node from described local mobile anchor, described home network prefix is sent to described mobile node, after having solved the different network environment of the mobile node access of supporting how mobile session, owing to can't obtain the affiliated home network prefix of the mobile session of mobile node correspondence, the problem that causes the business of the multi-link session of MN take place to be interrupted, realized that mobile node inserts the multi-link business of realization in the environment in difference, has improved user's experience degree.
Fig. 5 is provided for another that provides in the embodiment of the invention by the specific implementation flow chart of multi-link business.
When step S500, mobile node are linked into the second Mobile Access Gateway MAG2 from the first Mobile Access Gateway MAG1, the access authentication success, mobile node is authorized to visit the business of the second Mobile Access Gateway MAG2.
Step S502, mobile node send mobile conversation request message to the second Mobile Access Gateway MAG2, and session connection is set up in request.
Step S503, the second Mobile Access Gateway MAG2 carry the request mobile node to local mobile anchor LMA transmission, and all move the indication information of session connection information.
Carry the indication information of all connection attributes of request mobile node in the described request message.For example, have mobile session connection sign option in request, the length field value in the option is 0 o'clock, and indication is moved the session connection attribute to all of local mobile anchor request mobile node.When length field value is the length (4 bytes) of connection identifier field, indicate certain concrete mobile session.
After step S504, local mobile anchor receive request, be defined as mobile node and set up a plurality of mobile sessions, and return described mobile session and set up acknowledge message.
Wherein saidly state mobile session and set up acknowledge message and can confirm PBA message for agent binding update, all that carry mobile node in the wherein said message move session connection information, perhaps certain professional relevant all moves session connection information, and distribute to mobile node each move the home network prefix of session.
Step S506, the second Mobile Access Gateway MAG2 receive described mobile session and set up acknowledge message, according to described acknowledge message, the home network prefix under the mobile session of mobile node are sent to mobile node.
The described second Mobile Access Gateway MAG2 sends to mobile node by dhcp message or advertising of route message with described home network prefix.
For present embodiment, also there is a kind of expansion scheme:
When mobile session request was set up in second Mobile Access Gateway MAG2 request for mobile node, the link information that LMA can be further returns mobile node to the second Mobile Access Gateway MAG2 comprises being redirected indicated, and alternatively new LMA address is returned to MAG;
For MAG2, when comprising in the link information that receives when being redirected indication, the LMA information that will provide according to current LMA, or according to connecting the professional corresponding LMA tabulation of searching, or according to the LMA tabulation that this locality disposes, select new LMA, will register to new LMA.
See also Fig. 6, a kind of apparatus structure schematic diagram of realizing multi-link business of Fig. 6 for providing in the embodiment of the invention.
Set up the device of a plurality of mobile sessions in a kind of proxy mobile IP system, described device comprises:
Acquiring unit 600, be used for when mobile node moves to second Mobile Access Gateway from first Mobile Access Gateway, obtain the mobile session connection information of described mobile node, described link information comprises: the business information under the mobile session and mobile session connection sign; Wherein, first Mobile Access Gateway lays respectively at different inserting technology networks with second Mobile Access Gateway;
Transmitting element 604, be used for according to described foundation and local mobile anchor between mobile session, obtain the home network prefix under the mobile session of described mobile node from described local mobile anchor; And described home network prefix sent to described mobile node.
Described device also comprises: receiving element 606, for the mobile conversation request message that receives mobile node, wherein, described request message comprises: dynamic host allocation protocol DHCP request message or route request information.
Wherein, described acquiring unit specifically obtains the mobile session connection information of described mobile node from the mobile conversation request message that receiving element receives; Perhaps from aaa server, obtain the mobile session connection information of described mobile node.
Described mobile session connection request message also comprises: the mobile session connection information of described mobile node.
Described device is Mobile Access Gateway, and described Mobile Access Gateway comprises: the function of dhcp relay agent or Dynamic Host Configuration Protocol server, can coexist with dhcp relay agent, and also can coexist with Dynamic Host Configuration Protocol server.
A kind ofly realize multi-link device by what the embodiment of the invention described above provided, and mutually mutual between each module in the device, make and to move success when being attached to second Mobile Access Gateway from first Mobile Access Gateway when described mobile node, this device can be by the session connection information of obtaining, and then the affiliated home network prefix of mobile session of mobile node is distributed in acquisition, and send to described mobile subscriber terminal, after having solved the different network environment of the mobile node access of supporting how mobile session, owing to can't obtain the affiliated home network prefix of the mobile session of mobile node correspondence, the problem that causes the business of the multi-link session of MN take place to be interrupted, realized that mobile node inserts the multi-link business of realization in the environment in difference, has improved user's experience degree.
A kind of system configuration schematic diagram of realizing the device of multi-link business of Fig. 7 for providing in the embodiment of the invention.
A kind of system that realizes multi-link business, described system comprises:
Second Mobile Access Gateway 700, be used for when mobile node moves to second Mobile Access Gateway from first Mobile Access Gateway, obtain the mobile session connection information of described mobile node, described link information comprises: the business information under the mobile session and mobile session connection sign; Wherein, first Mobile Access Gateway lays respectively at different inserting technology networks with second Mobile Access Gateway; According to described mobile session connection information, the mobile session between foundation and the local mobile anchor; And according to described foundation and local mobile anchor between mobile session, obtain the home network prefix under the mobile session of described mobile node from described local mobile anchor; And described home network prefix sent to described mobile node.
Local mobile anchor 702 is used for the mobile session of setting up according to described second Mobile Access Gateway, sends home network prefix under the mobile session of described mobile node to described second Mobile Access Gateway.
Described system also comprises: mobile node 704, and for the home network prefix under the mobile session of the described mobile node that receives described second Mobile Access Gateway transmission.
Described mobile node, the mobile conversation request message that also is used for sending is to described second Mobile Access Gateway, and described request message comprises: dynamic host allocation protocol DHCP request message or route request information.
Described mobile conversation request message also comprises: the mobile session connection information of described mobile node.
The described mobile session connection information of obtaining described mobile node is specifically obtained from the mobile session connection request message that mobile node sends, and perhaps obtains from aaa server.
The second Mobile Access Gateway MAG2 or the first Mobile Access Gateway MAG1 and local mobile anchor LMA are the basic network elements of PMIP protocol system.In different network systems, usually they lay respectively on IAD and the core net gateway.Need to prove that in different scenes, Mobile Access Gateway can coexist with dhcp relay agent, also can coexist with Dynamic Host Configuration Protocol server.
A kind ofly realize multi-link system by what the embodiment of the invention described above provided, and the mobile node in the system, mutually mutual between second Mobile Access Gateway and the local mobile node, make and to move success when being attached to second Mobile Access Gateway from first Mobile Access Gateway when described mobile node, described second Mobile Access Gateway can be by the mobile session connection information of obtaining, thereby obtain to distribute to the affiliated home network prefix of mobile session of mobile node, and send to described mobile subscriber terminal, after having solved the different network environment of the mobile node access of supporting how mobile session, owing to can't obtain the affiliated home network prefix of the mobile session of mobile node correspondence, the problem that causes the business of the multi-link session of MN take place to be interrupted, realized that mobile node inserts the multi-link business of realization in the environment in difference, has improved user's experience degree.
The above; only for the preferable embodiment of the present invention, but protection scope of the present invention and mend and be confined to this, anyly be familiar with those skilled in the art in the technical scope that the present invention discloses; the variation that can expect easily or replacement all should be encompassed within protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with the protection range of claim.
Claims (3)
1. set up the method for a plurality of mobile sessions in the proxy mobile IP system, it is characterized in that first Mobile Access Gateway lays respectively at different inserting technology networks with second Mobile Access Gateway, described method comprises:
When mobile node moves to second Mobile Access Gateway from first Mobile Access Gateway, described second Mobile Access Gateway obtains the mobile session connection information of described mobile node, and described mobile session connection information comprises: the business information under the mobile session and mobile session connection sign; Described second Mobile Access Gateway is according to described mobile session connection information, set up and local mobile anchor between mobile session;
Described second Mobile Access Gateway according to described foundation and local mobile anchor between mobile session, obtain the home network prefix under the mobile session of described mobile node from described local mobile anchor, and described home network prefix is sent to described mobile node;
Before described mobile node moves to second Mobile Access Gateway from first Mobile Access Gateway, also comprise:
Described mobile node is attached to described first Mobile Access Gateway, sets up mobile session to the described first Mobile Access Gateway request; Described first Mobile Access Gateway is created the connection data field of described mobile node, and sends mobile conversation request message to described local mobile anchor, comprises the described mobile session connection information of described mobile node in the described mobile conversation request message;
After described local mobile anchor receives described mobile conversation request message, generate authentication and authorization charging AAA request message, carry described mobile session connection information in the described AAA request message; Mandate connects if aaa server is according to described AAA request message, and described aaa server returns to described local mobile anchor and connects license confirmation message, and preserves described mobile session connection information;
After described local mobile anchor is received described connection license confirmation message, for described mobile node distributes described home network prefix, preserve the corresponding relation of described home network prefix and described mobile session connection information, and return mobile session to described first Mobile Access Gateway and set up acknowledge message, described mobile session is set up and is carried described home network prefix in the acknowledge message; Described first Mobile Access Gateway sends to mobile node with described home network prefix after receiving that acknowledge message is set up in described mobile session;
The described mobile session connection information of obtaining described mobile node is specially: the mobile session connection information of obtaining described mobile node from aaa server.
2. set up the system of a plurality of mobile sessions in the proxy mobile IP system, it is characterized in that, described system comprises: first Mobile Access Gateway, second Mobile Access Gateway, local mobile anchor and aaa server, wherein said first Mobile Access Gateway lays respectively at different inserting technology networks with described second Mobile Access Gateway;
Described second Mobile Access Gateway, be used for when mobile node moves to described second Mobile Access Gateway from described first Mobile Access Gateway, obtain the mobile session connection information of described mobile node from described aaa server, described link information comprises: the business information under the mobile session and mobile session connection sign; According to described mobile session connection information, the mobile session between foundation and the described local mobile anchor; And according to described foundation and local mobile anchor between mobile session, obtain the home network prefix under the mobile session of described mobile node from described local mobile anchor; And described home network prefix sent to described mobile node;
Described local mobile anchor is used for the mobile session of setting up according to described second Mobile Access Gateway, sends home network prefix under the mobile session of described mobile node to described second Mobile Access Gateway;
Described first Mobile Access Gateway, be used for before mobile node moves to second Mobile Access Gateway from first Mobile Access Gateway, receive described mobile node and set up the request message of mobile session, create the connection data field of described mobile node, and send mobile conversation request message to described local mobile anchor, comprise the described mobile session connection information of described mobile node in the described mobile conversation request message;
Described local mobile anchor also is used for receiving the described mobile conversation request message that described first Mobile Access Gateway sends, and generates authentication and authorization charging AAA request message, carries described mobile session connection information in the described AAA request message;
Described aaa server is used for judging whether that according to described AAA request message mandate connects; Connect if authorize, then return connection license confirmation message to described local mobile anchor, and preserve described mobile session connection information;
Described local mobile anchor, also be used for after receiving the described connection license confirmation message that described aaa server sends, for described mobile node distributes described home network prefix, preserve the corresponding relation of described home network prefix and described mobile session connection information, and return mobile session to described first Mobile Access Gateway and set up acknowledge message, described mobile session is set up and is carried described home network prefix in the acknowledge message;
Described first Mobile Access Gateway, acknowledge message is set up in the described mobile session that also is used for the described local mobile anchor transmission of reception, and described home network prefix is sent to mobile node.
3. system according to claim 2 is characterized in that, described system also comprises:
Mobile node is for the home network prefix under the mobile session of the described mobile node that receives described second Mobile Access Gateway transmission.
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