CN1897743A - Method for supporting and switching multiple conversation in wireless access network - Google Patents
Method for supporting and switching multiple conversation in wireless access network Download PDFInfo
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- CN1897743A CN1897743A CNA2005100828465A CN200510082846A CN1897743A CN 1897743 A CN1897743 A CN 1897743A CN A2005100828465 A CNA2005100828465 A CN A2005100828465A CN 200510082846 A CN200510082846 A CN 200510082846A CN 1897743 A CN1897743 A CN 1897743A
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Abstract
The method comprises: a) the mobile control unit in the access serving network sends a switch request message to the mobile IP client side agent module; the switch request message carries session information group; b) according to the session information group, the MIP client agent module determines the tunnel to be established; c) initiating a registration for the tunnel to be established; d) deciding if all the tunnels to be established has initiated MIP registration; if yes, entering into step e; otherwise, returning to the step c; e) the mobile IP client side agent module returns the switch result to the mobile IP client side. The invention can solves problem of R3 switch when multi sessions are carried in one tunnel.
Description
Technical field
The present invention relates to the communications field, relate in particular to the changing method of supporting in a kind of Radio Access Network (ASN) under many sessions.
Background technology
Extensive use along with the flourish and wireless network of internet service, general grouped wireless network (GPRS), third generation communication network (3G), microwave access global intercommunication network (WiMAX) and back 3G wireless systems such as (B3G, Beyond 3G) have obtained a large amount of application and concern.The increase of number of users and the increase of user's request provide new demand for wireless access network system: requirement can be supported big capacity, the multiple business that big data quantity and different service quality require.The function of many session managements just.
Wireless access network is mainly finished provides business to provide Packet Service between network and the mobile subscriber to transmit or the function of route.Do not consider other internal units in the Access Network, we will adopt WiMAX network architecture system shown in Figure 1 to carry out related description when technical description subsequently, but technology provided by the present invention includes but not limited to the application in the WiMAX system.
The functional interpretation of each network element among Fig. 1 is as follows:
ASN:ASN is defined as the network function set that the wireless access service is provided for the WiMAX terminal, and ASN has comprised base station (BS) and access service network gateway (ASN-GW) network element.ASN mainly provides following function:
The function of BS:
-provide BS to be connected with the L2 of mobile subscriber station (MSS);
-RRM;
-measure and power control;
The compression and the encryption of-the data of eating dishes without rice or wine;
The function of ASN-GW:
-provide proxy function for MSS authentication function;
-network enabled service provider's (NSP) network is found and is selected;
-the Relay function (as IP address assignment) of L3 information is provided for MSS;
-RRM;
ASN-GW can be divided into ASN-GW decision point (DP) function and ASN-GW execution point (EP) function on logic function, wherein DP mainly is the entity of some chain of command functions of processing, and EP is the entity of deal with data surface function.Whether do not limit them in the present invention geographically separates.
Tunnel management between the-ASN-CSN is equivalent to the external agent (FA) in the mobile IP technology.
Except above-mentioned functions, can also comprise (non-essential function):
Switch in-the ASN;
-MSS paging and location management;
The registration of-vision location;
CSN:CSN is defined as to the WiMAX terminal IP is provided Connection Service.CSN mainly provides following function:
The IP address assignment of-MSS;
-Internet inserts;
-authentication, authentication, charging proxy (AAA proxy) or server;
-based on user's authorization control;
-ASN is equivalent to the home agent (HA) in the mobile IP technology to the tunnel of CSN;
-WiMAX user's charging and the clearing between the operator;
Tunnel under the-roaming condition between the CSN;
Switching between the-ASN;
-various WiMAX services (as location-based business, multi-medium multi-packet broadcasting and broadcasting service, IP Multimedia System business);
MSS:MSS is a mobile subscriber equipment, and the user uses this devices accessing WiMAX network.
From ASN IP data carried by data face, the grouping busihess data of descending MSS newspaper is from the HA of the CSN tunnel (Interface R3) by the foundation between the ASN-GW HA and the ASN, be sent among the ASN, and send on the BS through the ASN internal interface by ASN-GW, utilize the R1 interface between BS and the MSS that the data of MSS are sent on the MSS then.Up datagram also sends among the ASN through the MSS that associates, and sends in the outer net through the tunnel between ASN GW and the HA.
On the session service aspect, the session between any one MSS and the business network (session) all needs to utilize the IP carrying of ASN and the function of transmission.But at different sessions, session that might be all is the tunnel carrying by same ASN-GW and HA, also might be different session by the different tunnels carrying between ASN-GW and the HA, also might different sessions be that the tunnel by the HA foundation among ASN-GW and the different CSN carries.In the notion of mobile IP,, will have a plurality of attachment points (PoA) address to this MSS so if having many tunnels for a MSS.
When switching or because switching that the network side resource management is triggered the time owing to moving of MSS, if the HA that causes taking place this MSS owing to the variation of ASN-GW is to when the ASN tunnel changes, the R3 that Inter ASN-GW promptly takes place moves, and then needs to rebulid the tunnel of each session of carrying.The present invention will propose a kind of improving one's methods of message of switching, to support the switching under many session case.
Under the PMIP pattern, the Client Agent of MIP is in ASN, the processing of requests such as foundation/release of MIP and response message is transparent for MSS, the Client Agent of MIP or by FA or directly and foundation/releases of finishing all MIP between the HA wait the initiation of request and response message and reception to operate, thereby the IP tunnel between foundation/release ASN-GW and the HA.
In mobile IP (MIP) process, the client of MIP on MSS, thereby MSS or by FA or directly and foundation/releases of finishing all MIP between the HA wait the initiation of request and response message and reception to operate IP tunnel between foundation/release ASN-GW and the HA.For this pattern, we are referred to as CMIP.
The technical scheme of prior art 1 is to propose among the motion 050607_NWG_01r8_PMIP-Inter-ASN-mobility-accepted that switches under the PMIP situation of passing through in the NWG of WiMAX Forum working group meeting.Under the PMIP situation, the mobile management unit that R3 switches in intra ASN triggers, and by handoff request (R3_Handover.Request), the sign of this MSS is provided, and the MIP that the client that activates MIP has initiated to set up new FA and the tunnel between the HA goes registration process (reach simultaneously discharge original FA and the tunnel between the HA).Received the response that MIP registers up to the MIP client, the MIP client just returns to Intra ASN mobile management unit with switching result by handoff response (R3_Handover.Reply).Thereby finished the handoff procedure of whole R3 mobile management.Whole process as shown in Figure 2.Its main flow process is as follows as can see from Figure 2:
011-012) before switching, MSS and CSN are by the air interface of MSS and BS, and the ASN internal tunnel between BS and the service ASN-GW is served tunnel transmission/exchange session business datum of setting up by mobile IP protocol between ASN-GW and the HA.
013) because the MSS terminal moves or the needs of ASN network resource management, the mobile management unit of Intra-ASN has triggered the R3 handoff procedure, if the switching that triggers owing to the needs of ASN network resource management, be to trigger the R3 handoff procedure by the mobile management unit of network resource management unit notice Intra-ASN earlier so.
The MIP Client Agent just starts the heavy registration process of MIP after the R3_Handover.Request message that has comprised MSS sign and target ASN-GW that the mobile management unit of receiving Intra-ASN sends over.
014-017) the contextual renewal process of MIP: the MIP Client Agent sends the MIP registration message and transmits heavy register requirement by the FA module in the middle of the target ASN-GW to HA, require HA that the IP address of this MSS in the message is bound together with new ASN-GW: promptly to require release for the tunnel of the corresponding HA in this MSS IP address to source ASN-GW, set up the tunnel of the HA of this MSS IP address correspondence simultaneously, thereby all IP datagram relevant with the IP address of this MSS are just by new tunnel carrying to target ASN-GW.
018) receive after the MIP registration reply message, if success, the MIP Client Agent upgrades the R3 information of this MSS by the mobile management unit of R3_Handover.Reply message informing Intra-ASN; If failure, the MIP Client Agent recovers the original state of MSS again by the mobile management unit of R3_Handover.Reply message informing Intra-ASN so.
019-0111) with 014～018 simultaneously, the R6 tunnel from base station (BS) to target ASN-GW of setting up new ASN inside is so that the session service data of the datagram of MSS by the tunnel transmission upper strata BS and target ASN-GW and target ASN-GW and the HA.By setting up the R4 tunnel between the ASN-GW, simultaneously as switching the ephemeral data passage between the ASN-GW in the transient process.Deletion is at the source ASN-GW of this MSS and the R6 tunnel between the BS.
In prior art 1, if having many tunnels to carry a plurality of sessions, adopt this technology so at this MSS, be to reach the bearing tunnel of setting up all sessions only by a MIP register requirement.Article one, the foundation in tunnel success also can not mean the success of the handoff procedure of whole R3 mobile management.
Prior art 2 is the methods that propose among the motion 050602_NWG_05_Client_MIP_Architecture-accepted at CMIP that passes through in the NWG of WiMAX Forum working group meeting.Under the CMIP pattern, the processing procedure of the client of MIP on MSS.Service ASN-GW unit originally is after having triggered handoff procedure, initiated R3 handoff request (R3_Handover.Request) to target ASN-GW, and provide the sign of this MSS, send the FA advertisement by target ASN-GW FA to this MSS, notice initiates to set up new FA and the MIP registration process in the tunnel between the HA (discharging original service ASN-GW and the tunnel between the HA simultaneously) in the MIP client on the MSS.Responded the response of MIP registration up to HA, and after being transmitted to MSS by target ASN-GW FA, target ASN-GW FA just returns to original service ASN-GW unit with the result by R3 handoff response (R3_Handover.Reply).Thereby finished whole R3 handoff procedure.Whole process as shown in Figure 2.
021-022) before switching, MSS and CSN are by the air interface of MSS and BS, and the ASN internal tunnel between BS and the service ASN-GW is served tunnel transmission/exchange session business datum of setting up by mobile IP protocol between ASN-GW and the HA.
023) ASN-GW of source service triggers R3 and switches, and the R3_Handover.Request message that will comprise the MSS sign sends to target ASN-GW.
024) receive switch message after, the MIP FA module among the target ASN-GW tells MSS that variation has taken place accompanying FA FA advertisement information notice MSS, requires the MIP client among the MSS to initiate the heavy register requirement of MIP, rebulids the R3 tunnel of HA to target FA.
025-026) the MIP client sends the MIP registration message and transmits heavy register requirement by the FA module in the middle of the target ASN-GW to HA, require HA that the IP address of this MSS in the message is bound together with new ASN-GW: promptly to require release for the tunnel of the corresponding HA in this MSS IP address to source ASN-GW, set up the tunnel of the HA of this MSS IP address correspondence simultaneously, thereby all IP datagram relevant with the IP address of this MSS are just by new tunnel carrying to target ASN-GW.
When 027) the FA module in the middle of target ASN-GW was received MIP registration response and is transmitted to MSS, the FA module was upgraded the R3 information of this MSS by the mobile management unit of R3_Handover.Reply message informing Intra-ASN according to the result in the registration reply message (registration failure or successful).
028-0210) with step 027) simultaneously, the R6 tunnel from BS to target ASN-GW of setting up new ASN inside is so that the session service data of the datagram of MSS by the tunnel transmission upper strata BS and target ASN-GW and target ASN-GW and the HA.By setting up the R4 tunnel between the ASN-GW, simultaneously as switching the ephemeral data passage between the ASN-GW in the transient process.Deletion is at the source ASN-GW of this MSS and the R6 tunnel between the BS.
Prior art 2 shortcomings are as follows:
First, shortcoming is with technology one, if have many tunnels to carry a plurality of sessions at this MSS, adopt this technology so, be to reach the bearing tunnel of setting up all sessions by a MIP register requirement only, the foundation success in a tunnel also can not mean the success of the handoff procedure of whole R3 mobile management.
Second, from the handoff request message of original service ASN-GW band, the information that session should be arranged, judge it is the MIP registration process that needs to initiate how many times by target ASN-GW like this, set up many tunnels of HA to new FA, target ASN-GW need know the information of the session that each tunnel carries above simultaneously, be convenient to charge statistics or the like function and session management after this etc., but in scheme, can't obtain relevant information.
Summary of the invention
The invention provides a kind ofly in wireless access network, support the R3 handover scheme under the many session case of MSS.To solve in the prior art, can't handle the problem of the switching under the many session case of MSS.
The inventive method comprises:
Support the changing method under many sessions in a kind of Radio Access Network, it is characterized in that may further comprise the steps:
A, the inner mobile management unit of access service network send handoff request message to the mobile IP customer terminal proxy module, in the described handoff request message, carry the session information group;
B, MIP Client Agent module need to determine the tunnel of foundation according to described session information group;
C, the tunnel initiation MIP that sets up at needs register;
Whether the tunnel that D, judgement are set up at needs has all initiated the MIP registration, if enter step e, returns step C if not;
E, mobile IP customer terminal proxy module return switching result information to mobile IP customer terminal.
In the described steps A, described session information group comprises one of following information or combination:
Target access service network gateway, session id, attachment point address, home agent (HA) address and mobile subscriber station ID.
Among the described step C, described mobile IP registration is with described attachment point address and the binding of destination service access service network gateway by the mobile IP customer terminal agency.
Before the described steps A, also comprise step:
A1: network resource management unit notice access service network content mobile management unit triggers and switches.
Among the described step C,, then keep former tunnel to connect if there is the tunnel that needs to set up to initiate the MIP registration failure.
In the described step e, described object information comprises session switching result information sets, comprises mobile subscriber station ID, session id, this session switching result in the described session switching result information sets.
Support the changing method under many sessions in a kind of Radio Access Network, it is characterized in that may further comprise the steps:
A, source service access service network gateway send handoff request message to the target external proxy module, in the described handoff request message, carry the session information group;
External agent's module of b, destination service access service network gateway need to determine the tunnel of foundation according to described session information group;
Mobile IP registration is initiated in the tunnel that c, destination service access service network gateway are set up at needs;
D, destination service access service network gateway judge that whether the tunnel of setting up at needs has all initiated mobile IP registration, if enter step e, returns step c if not;
External agent's module of e, destination service access service network gateway is returned switching result information to source service access service network gateway.
Among the described step a, described session information group comprises one of following information or combination:
Target access service network gateway, session id, attachment point address, home agent (HA) address and mobile subscriber station ID.
Among the described step b, also comprise step:
B1: external agent's module of destination service access service network gateway is with described initiation mobile IP registration notice mobile subscriber station.
Described step c further may further comprise the steps:
The tunnel that c1, target ASN-GW FA set up at needs, the MIP client of notice on MSS initiated mobile IP registration.
Among the described step c1, the MIP client of described notice on MSS initiated the step of mobile IP registration, finishes by message/signaling on the R6 interface between FA advertisement information or BS and the ASN-GW and the air interface management message between BS and the MSS.
Among the described step c, the MIP registration failure is initiated in the tunnel of setting up if desired, then keeps former tunnel to connect.
Described object information comprises session switching result information sets, comprises mobile subscriber station ID, session id, this session switching result in the described session switching result information sets.
Beneficial effect of the present invention is as follows:
The present invention can solve the problem that the R3 of a plurality of sessions carry on same tunnel switches, and in the carrying problem that a plurality of sessions take place to rebulid when R3 switches, the present invention program is simple, is easy to realize.
Description of drawings
Fig. 1 is a WiMAX schematic network structure in the prior art;
Fig. 2 is the switching schematic diagram under the PMIP pattern in the prior art;
Fig. 3 is the switching schematic diagram under the CMIP pattern in the prior art;
Fig. 4 is the switching schematic diagram of the present invention program under the PMIP pattern;
Fig. 5 is the switching schematic diagram of the present invention program under the CMIP pattern.
Embodiment
Below in conjunction with Figure of description the specific embodiment of the present invention is described.
The present invention proposes a kind of in wireless access network, supports the R3 handoff procedure under the many session case of MSS.Can when switching, set up the bearing tunnel of each dialogue effectively.At PMIP and CMIP pattern, the present invention can have two schemes, is described below respectively:
Switching under the embodiment 1:PMIP pattern.
Under the PMIP pattern, the Client Agent of MIP is in ASN, the processing of request such as foundation/release of MIP and response message is transparent for MSS, the Client Agent of MIP or by FA or directly and foundation/releases of finishing all MIP between the HA wait the initiation of request and response message and reception to operate.Handoff procedure under the PMIP pattern may further comprise the steps:
(11), need the session information of this MSS is sent to the MIP Client Agent by intra ASN MM in the R3_Handover.Request message the inside of initiating to switch.This session information can comprise: Session ID, attachment point address (PoA) among the MIP, corresponding HA address, MSS ID etc., consider it might is to switch a batch session, these session informations can be made into one group of table that contains Session ID, PoA address, HA address.
In the prior art, the session information the inside has only comprised MSS ID, Target ASN-GW, Transaction ID, these are enough usefulness under single session case, because under single session case, only have a PoA address for any one MSS, also only need notice to bind the HA release of this MSS information and the tunnel between the original ASN-GW, set up the tunnel of target ASN-GW and HA, but under the situation of the many sessions of MSS, may different sessions be to be carried on the different tunnel of HA and ASN-GW, and may be different HA and the tunnel between this ASN-GW that so just needs increase session ID, PoA, the tabulation of HA address at each session of this MSS, can all be provided with so tlv triple, there is the session of this MSS of what needs switching just to have what such tlv triple, thereby constituted a triple table.
If store the PoA address of each session correspondence of each MSS at the MIP Client Agent, the PoA address is an option in message so.
(12) at the MIP Client Agent according to session information, (this address can obtain from switch message particularly to switch the pairing PoA of each session address in the message, if store the PoA address of each session correspondence of each MSS at the MIP Client Agent, so just can be) according to searching acquisition in the session of MIP Client Agent storage and the correspondence table of PoA address, need to determine the tunnel number of foundation, if the corresponding identical PoA address of a plurality of sessions is arranged, that means carried a plurality of sessions on same tunnel.Storage update is convenient to later session management at the MIP Client Agent but the ID of session needs the while.
Illustrate: if the triple table in the message that receives is: (1,192.1.1.2,192.38.64.3) (2,192.1.1.5,192.38.64.7) (3,192.1.1.2,192.38.64.3) (4,192.1.1.2,192.38.64.3) (5,192.1.1.7,192.38.64.3), at PoA address 192.1.1.2 three sessions are arranged so, just have three sessions all to be based upon on the tunnel of ASN-GW and this HA of 192.38.64.3, this is a tunnel; At PoA address 192.1.1.5 a session is arranged, this session is to be based upon on the tunnel of ASN-GW and this HA of 192.38.64.7, and this is second tunnel; At PoA address 192.1.1.7 a session is arranged, this session is to be based upon on the tunnel of ASN-GW and this HA of 192.38.64.3, and this is the 3rd tunnel.So in this case, can determine to set up three tunnels.
(13) all initiate the MIP register requirement at each tunnel.All initiate the MIP register requirement by the MIP Client Agent at each tunnel.Stipulate in the MIP agreement according to standard, in MIP RegistrationRequest, life time (Lifetime) is made as 0, while is the PoA address process FA of the MSS of needs binding or directly send to HA, thereby HA can discharge for the original source ASN-GW of this PoA and the tunnel of HA, sets up simultaneously at the target ASN-GW of this PoA address of MSS and the tunnel of HA.
(14) after all tunnels in (13) all disposed, the MIP client was just ended session the mobile management unit of result by R3 handoff response report Intra-ASN.This R3_Handover.Reply message all has corresponding result for each session id in R3_Session_Release.Request message) return Intra ASN mobile management unit, thus finished whole R3 handoff procedure.Need to comprise information such as mobile subscriber station ID, session id, this session switching result in the session switching result information sets.
As shown in Figure 4, be the switching flow schematic diagram under the PMIP pattern, the related news content is done to be provided with as following table 1:
| R3_Handover.Request ? ? | Intra-NAP?MM＝＞PMIP?Client ? ? | MSS?ID，Target?ASN-GW， Transaction?ID，list?of(session ID，PoA@，HA?address)pair |
| R3_Handover.Reply ? ? ? | PMIP?Mob?client＝＞Intra-NAP MM ? ? | MSS?ID，list?of(session?ID， Status(Successful，Failed)， [Error?Code])pair，Transaction ID |
Table 1
As can be seen from Fig. 4, this process mainly may further comprise the steps:
11-12) before switching, MSS and CSN are by the air interface of MSS and BS, and the ASN internal tunnel between BS and the service ASN-GW is served tunnel transmission/exchange session business datum of setting up by mobile IP protocol between ASN-GW and the HA.
13) because the MSS terminal moves or the needs of ASN network resource management, the mobile management unit of Intra-ASN has triggered the R3 handoff procedure
If the switching that triggers owing to the needs of ASN network resource management needs to have earlier the mobile management unit of network resource management unit notice Intra-ASN to trigger the R3 handoff procedure so.
The MIP Client Agent has comprised MSS sign, target ASN-GW and session, PoA address what the mobile management unit of receiving Intra-ASN sended over, just starts the heavy registration process of MIP after the R3_Handover.Request message of the session informations such as triple table of HA address.The ID storage update of session simultaneously is convenient to later session management in MIP Client Agent unit, and present embodiment hypothesis PoA address entries provides in handoff request message.
14-17) the contextual renewal process of MIP: the MIP Client Agent sends the MIP registration message and transmits heavy register requirement by the FA module in the middle of the target ASN-GW to HA, require HA that the IP address of this MSS in the message is bound together with new ASN-GW: promptly to require release for the tunnel of the corresponding HA in this MSS IP address to source ASN-GW, set up the tunnel of the HA of this MSS IP address correspondence simultaneously, thereby all IP datagram relevant with the IP address of this MSS are just by new tunnel carrying to target ASN-GW.
This process repeats repeatedly, and the heavy registration process up to all tunnels all is finished.
18) receive after all MIP registration reply messages, if all successes, the MIP Client Agent upgrades the R3 information of this MSS by the mobile management unit of R3_Handover.Reply message informing Intra-ASN; If all failures, the MIP Client Agent recovers the original state of MSS again by the mobile management unit of R3_Handover.Reply message informing Intra-ASN so.If the situation of part success/failure then realizes the partial session migration.
Other alternative method in fact also can be arranged such as recovering the original state of MSS again, allow all sessions still pass through original ASN-GW and the tunnel between the HA etc.
If 19-111) 18) all successes, the carrying that then can set up the session inside in ASN on the tunnel that relevant success sets up: the R6 tunnel from BS to target ASN-GW of setting up new ASN inside is so that the session service data of the datagram of MSS by the tunnel transmission upper strata BS and target ASN-GW and target ASN-GW and the HA.By setting up the R4 tunnel between the ASN-GW, simultaneously as switching the ephemeral data passage between the ASN-GW in the transient process.Deletion is at the source ASN-GW of this MSS and the R6 tunnel between the BS.For the tunnel of failure, can end the session relevant with this tunnel, perhaps recover the tunnel of original ASN-GW and HA.For the successful tunnel of part, can be according to whole successful method, the carrying of inside among the new ASN is set up in the session on the tunnel of setting up for success, or recovers the tunnel of original ASN-GW and HA.
Embodiment 2: the switching under the CMIP pattern.
In the MIP process, the client of MIP on MSS, thereby MSS or by FA or directly and foundation/releases of finishing all MIP between the HA wait the initiation of request and response message and reception to operate IP tunnel between foundation/release ASN-GW and the HA.For this pattern, we are referred to as CMIP.Handoff procedure under the CMIP pattern may further comprise the steps:
(21) in the R3_Handover.Request message the inside of initiate switching, need the session information of this MSS is sent to ASN-GW FA, send to FA module on the target ASN-GW by source service ASN-GW.Above-mentioned session information can be provided with similarly to Example 1.
(22) at ASN-GW FA according to session information, the tunnel number of determine to need setting up.
(23) all initiate the MIP register requirement at each tunnel.
ASN-GW FA sends the FA advertisement information to MSS (MIP client) at each tunnel, and notice MSS (MIP client) initiates the MIP register requirement by FA to HA.
The tunnel that target ASN-GW FA sets up at needs, by the FA advertisement information or utilize BS and ASN-GW between the R6 interface on message/signaling BS and the MIP client of the air interface management message informing between the MSS on MSS initiate the mobile IP registration process.MIP registration message between MSS and the HA all is to transmit through ASN-GW FA, thereby for the MIP message at each tunnel, ASN-GW FA can both obtain the MIP registering result from the MIP registration reply message.
Stipulate in the MIP agreement according to standard, in the MIP login request message, the PoA address of the MSS of needs binding is sent to HA through FA, thereby HA can discharge for the original source ASN-GW of this PoA and the tunnel of HA, sets up the tunnel of target ASN-GW and the HA of PoA simultaneously.
(24) after all tunnels in (23) all dispose, all can send the FA advertisement information by ASN-GW FA at each tunnel, notice MSS (MIP client) initiates the MIP register requirement.ASN-GW FA ends the result with session and returns original service ASN-GW FA by the R3 handoff response, thereby has finished whole R3 handoff procedure.Need to comprise information such as mobile subscriber station ID, session id, this session switching result in the session switching result information sets.
As shown in Figure 5, be the switching flow schematic diagram under the CMIP pattern, related news are done to be provided with as following table 2:
| R3_Handover.Request ? ? | Serving?ASN-GW＝＞T-ASN-GW ? ? | MSS?ID，Target?ASN-GW， Transaction?ID，list?of(session ID，PoA@，HA?address)pair |
| R3_Handover.Reply ? ? ? | T-ASN-GW＝＞Serving?ASN-GW ? ? ? | MSS?ID，list?of(session?ID， Status(Successful，Failed)， [Error?Code])pair，Transaction ID |
Table 2
As can be seen from Fig. 5, this process mainly may further comprise the steps:
21-22) before switching, MSS and CSN are by the air interface of MSS and BS, and the ASN internal tunnel between BS and the service ASN-GW is served tunnel transmission/exchange session business datum of setting up by mobile IP protocol between ASN-GW and the HA.
23) ASN-GW of source service triggers the R3 switching, and will comprise MSS sign, target ASN-GW and session, PoA address, and the R3_Handover.Request message of the session informations such as triple table of HA address sends to target ASN-GW.Present embodiment hypothesis PoA address entries provides in handoff request message.
24) receive switch message after, the MIP FA module among the target ASN-GW tells MSS that variation has taken place accompanying FA FA advertisement information notice MSS, requires the MIP client's section among the MSS to initiate the heavy register requirement of MIP, rebulids the R3 tunnel of HA to target FA.(this process repeats repeatedly, has all carried out up to the heavy registration process in all tunnels)
25-26) the MIP client sends the MIP login request message and transmits heavy register requirement by the FA module among the target ASN-GW to HA, require HA that the IP address of this MSS in the message is bound together with new ASN-GW: promptly to require release for the tunnel of the corresponding HA in this MSS IP address to source ASN-GW, set up the tunnel of the HA of this MSS IP address correspondence simultaneously, thereby all IP datagram relevant with the IP address of this MSS are just by new tunnel carrying to target ASN-GW.
When 27) the FA module in the middle of target ASN-GW is received MIP registration response and is transmitted to MSS, FA module in the middle of the target ASN-GW obtains the result of this register requirement, and judge whether that all tunnel registration reply messages receive, if all receive then according to the mobile management unit of the result in the registration reply message (registration failure or success) by R3_Handover.Reply message informing Intra-ASN.If all successes, the MIP Client Agent upgrades the R3 information of this MSS by the mobile management unit of R3_Handover.Reply message informing Intra-ASN; If all failures, the MIP Client Agent recovers the original state of MSS again by the mobile management unit of R3_Handover.Reply message informing Intra-ASN so.If the situation of part success/failure, realize that then partial session migration (in fact also can be by other alternative method: end the session of failure, perhaps recover the original state of MSS again, allow all sessions still pass through original ASN-GW and the tunnel between the HA)
If 28-210) 27) all successes, the carrying that then can set up the session inside in ASN on the tunnel that relevant success sets up: the R6 tunnel from BS to target ASN-GW of setting up new ASN inside is so that the session service data of the datagram of MSS by the tunnel transmission upper strata BS and target ASN-GW and target ASN-GW and the HA.By setting up the R4 tunnel between the ASN-GW, simultaneously as switching the ephemeral data passage between the ASN-GW in the transient process.Deletion is at the source ASN-GW of this MSS and the R6 tunnel between the BS.For the tunnel of failure, can end the session relevant with this tunnel, perhaps recover the tunnel of original ASN-GW and HA.For the successful tunnel of part, can be according to whole successful method, the carrying of inside among the new ASN is set up in the session on the tunnel of setting up for success, or recovers the tunnel of original ASN-GW and HA.
Obviously, those skilled in the art can carry out various changes and modification to the present invention and not break away from the spirit and scope of the present invention.Like this, if of the present invention these are revised and modification belongs within the scope of claim of the present invention and equivalent technologies thereof, then the present invention also is intended to comprise these changes and modification interior.
Claims (13)
1, the changing method under the many sessions of support in a kind of Radio Access Network is characterized in that may further comprise the steps:
A, the inner mobile management unit of access service network send handoff request message to the mobile IP customer terminal proxy module, in the described handoff request message, carry the session information group;
B, MIP Client Agent module need to determine the tunnel of foundation according to described session information group;
C, the tunnel initiation MIP that sets up at needs register;
Whether the tunnel that D, judgement are set up at needs has all initiated the MIP registration, if enter step e, returns step C if not;
E, mobile IP customer terminal proxy module return switching result information to mobile IP customer terminal.
2, the method for claim 1, it is characterized in that described steps A before, also comprise step:
A1: network resource management unit notice access service network content mobile management unit triggers and switches.
3, the method for claim 1 is characterized in that in the described steps A, and described session information group also comprises one of following information or combination:
Target access service network gateway, session id, attachment point address, home agent (HA) address and mobile subscriber station ID.
4, method as claimed in claim 3 is characterized in that among the described step C, and described mobile IP registration is with described attachment point address and the binding of destination service access service network gateway by the mobile IP customer terminal agency.
5, the method for claim 1 is characterized in that among the described step C, if there is the tunnel that needs to set up to initiate the MIP registration failure, then keeps former tunnel to connect.
6, the method for claim 1 is characterized in that in the described step e that described switching result information comprises session switching result information sets, comprises mobile subscriber station ID, session id, this session switching result in the described session switching result information sets.
7, the changing method under the many sessions of support in a kind of Radio Access Network is characterized in that may further comprise the steps:
A, source service access service network gateway send handoff request message to the target external proxy module, in the described handoff request message, carry the session information group;
External agent's module of b, destination service access service network gateway need to determine the tunnel of foundation according to described session information group;
Mobile IP registration is initiated in the tunnel that c, destination service access service network gateway are set up at needs;
D, destination service access service network gateway judge that whether the tunnel of setting up at needs has all initiated mobile IP registration, if enter step e, returns step c if not;
External agent's module of e, destination service access service network gateway is returned switching result information to source service access service network gateway.
8, method as claimed in claim 7 is characterized in that among the described step a, and described session information group comprises one of following information or combination:
Target access service network gateway, session id, attachment point address, home agent (HA) address and mobile subscriber station ID.
9, method as claimed in claim 7 is characterized in that also comprising step among the described step b:
B1: external agent's module of destination service access service network gateway is with described initiation mobile IP registration notice mobile subscriber station.
10, method as claimed in claim 7 is characterized in that described step c further may further comprise the steps:
The tunnel that c1, target ASN-GW FA set up at needs, the MIP client of notice on MSS initiated mobile IP registration.
11, method as claimed in claim 10, it is characterized in that among the described step c1, the MIP client of described notice on MSS initiated the step of mobile IP registration, finishes by message/signaling on the R6 interface between FA advertisement information or BS and the ASN-GW and the air interface management message between BS and the MSS.
12, method as claimed in claim 7 is characterized in that among the described step c, and the MIP registration failure is initiated in the tunnel of setting up if desired, then keeps former tunnel to connect.
13, method as claimed in claim 7 is characterized in that described object information comprises session switching result information sets, comprises mobile subscriber station ID, session id, this session switching result in the described session switching result information sets.
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| CN2005100828465A CN1897743B (en) | 2005-07-11 | 2005-07-11 | Method for supporting and switching multiple conversation in wireless access network |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2010075719A1 (en) * | 2008-12-31 | 2010-07-08 | 华为终端有限公司 | Multimedia session transfer method, device and system between access networks |
| CN101127786B (en) * | 2007-09-25 | 2011-12-07 | 中兴通讯股份有限公司 | A method for allocating IP address upon multiple registration of mobile IP |
| CN101360027B (en) * | 2007-07-30 | 2012-06-27 | 华为技术有限公司 | Method, apparatus and system for acquiring registering result and router migration |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| US6721565B1 (en) * | 2000-08-07 | 2004-04-13 | Lucent Technologies Inc. | Handover of wireless calls between systems supporting circuit and packet call models |
| US7315742B2 (en) * | 2003-12-15 | 2008-01-01 | International Business Machines Corporation | Voice-over IP mobile roaming using SIP refer |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101360027B (en) * | 2007-07-30 | 2012-06-27 | 华为技术有限公司 | Method, apparatus and system for acquiring registering result and router migration |
| CN101127786B (en) * | 2007-09-25 | 2011-12-07 | 中兴通讯股份有限公司 | A method for allocating IP address upon multiple registration of mobile IP |
| WO2010075719A1 (en) * | 2008-12-31 | 2010-07-08 | 华为终端有限公司 | Multimedia session transfer method, device and system between access networks |
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| CN1897743B (en) | 2012-01-25 |
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