CN101106491A

CN101106491A - Migration method for R3 interface in microwave access global intercommunication network ant its system

Info

Publication number: CN101106491A
Application number: CNA200610106530XA
Authority: CN
Inventors: 谢勇; 吴建军
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2006-07-11
Filing date: 2006-07-11
Publication date: 2008-01-16
Also published as: WO2008009230A1

Abstract

The invention relates to mobile communication field and discloses a migration method of worldwide interoperability network R3 interface for microwave access and the system thereof, which can reduce total MS handover delay. In the invention, decide whether R3 interface in the MSS anchoring network needs migration in MSS handover phase or not. If R3 interface is decided to be migrated, the object anchoring network will obtain the contextual information needed by R3 interface migration in original anchoring network and the R3 interface migrates to local. The mutual signaling in the handover procedure can be utilized to carry the contextual information needed by R3 interface migration, with no need of information exchange for R3 interface migration separately.

Description

The moving method of Interface R3 and system thereof in the microwave access global intercommunication network

Technical field

The present invention relates to moving communicating field, particularly micro-wave access to global intercommunication (WorldwideInteroperability for Microwave Access is called for short " WiMAX ") technology.

Background technology

The WiMAX access technology is that enterprise can be in order to making up metropolitan area network, or obtains the high-speed radio access service that the internet inserts.These wireless traffics replace traditional time division multiplexing (Time DivisionMultiplexing is called for short " TDM ") line activities.

Wireless access system is had by the service provider who runs in the metropolitan area usually, business comprises enterprise, MTU (Maximum Transmission Unit, abbreviation " MTU "), the internet of private local area network's (Local Area Network is called for short " the LAN ") bridge joint in family and the metropolitan area inserts.

Wireless broadband access system has relative higher data speed, and broadband wireless system can provide the bandwidth above Digital Subscriber Line (Digital Subscriber Line is called for short " DSL ") and cable network technique.

(the Institute of Electrical and Electronics Engineers of Institute of Electrical and Electronics Engineers, be called for short " IEEE ") be the nonprofit technical occupations of of U.S. association, be made up of the working group that is engaged in standard formulation in a lot of fields, these fields comprise Aero-Space electronics, circuit, communication, detecting instrument, electrical equipment standard, nuclear engineering, power electronics, telecommunications and vehicle technology and other a lot of aspects.Wherein, the information technology directorate branch comprises the working group that is engaged in bus architecture interface, local area network (LAN) and metropolitan area network, soft project, storage system and measuring technology and the formulation of other information technology standards.

IEEE 802 standard definition physical network interfaces, for example: the signaling and the cut-in method of network interface card, bridge, router, connector, cable and all and physical network join dependency.

Wherein, IEEE 802.16 is for working out wireless MAN (Wireless metropolitan areanetworks, abbreviation " WMAN ") working group of standard establishment, this working group mainly is responsible for the air-interface standard of fixed wireless access, relate to Multi-Channel Microwave Distribution System (Microwave MultipointDistribution System, abbreviation " MMDS "), LMDS technology such as (Local MultipointDistribution System/Service are called for short " LMDS ").

IEEE 802.16 has defined different physical-layer techniques at different frequency range.The range of application of standard is mainly towards dwelling house, small office/family office (SOHO), teleworker and Short Message Entity (Short Message Entity is called for short " SME ") market.

Micro-wave access to global intercommunication (Worldwide Interoperability for Microwave Access is called for short " WiMAX ") is intended to promote the promotion and application of the serial air protocol of IEEE 802.16 (IEEE 802.16, IEEE 802.16d, IEEE802.16e) in the whole world.The WiMAX of indication all refers to satisfy the network entity of IEEE 802.16 air protocol herein.

Specifically, WiMAX is devoted to help and solve the problem that those obstruction standards are used, such as interoperability between the product of different vendor and product cost problem.WiMAX will formulate the test specification of a cover interoperability, with this cover standard the product of relevant producer is tested and authenticated, and to those products granting WiMAX authentication marks by authentication, thereby the manufacturer that encourages all WiMAXs to insert related industry follows a unified standard, make to have good interoperability between each product, and wish to promote whereby the development that WiMAX inserts industry.

Fig. 1 illustrates the end-to-end reference model of WiMAX.As can be seen, WiMAX mainly comprises travelling carriage (Mobile Subscribe Station, be called for short " MSS ")/subscriber station (Subscribe Station, abbreviation " SS "), access service network (Access Service Network, be called for short " ASN ") and connectivity serving network (Connectivity Service Network is called for short " CSN ").

ASN is defined as the network function set that the wireless access service is provided for the WiMAX terminal, ASN has comprised base station (Base Station, be called for short " BS ") and access service network gateway (Access ServiceNetwork GateWay, be called for short " ASN_GW ") network element, an ASN may be shared by a plurality of CSN.

The major function of ASN comprises the function of BS and the function of ASN_GW.Wherein, the function of BS has: provide the L2 of BS and MSS/SS to be connected, the compression and the encryption of RRM, measurement and the power control and the data of eating dishes without rice or wine.The function of ASN_GW has: for SS/MSS authentication function provides agency (proxy) function; The network of support network services provider (NetWork Service Procider is called for short " NSP ") is found and is selected; The Relay function (as IP address assignment) of L3 information is provided for SS.The reference model of ASN as shown in Figure 2.

As shown in Figure 2, connect by the R8 interface between the BS, the definition of R8 interface is at present also in the middle of discussing.Pass through the R6 interface communication between BS and the ASN_GW gateway, and a BS can be connected with one or more ASN_GW.ASN is connected with CSN by Interface R3, and is connected with other ASN by Interface R4 by the ASN_GW gateway.

Specifically, Interface R3 comprises the protocol stack of chain of command and loading end, satisfies the interconnected requirement between ASN and the CSN.Wherein loading end is made of the internetworking agreement between ASN and the CSN (InternetProtocol is called for short " IP ") tunnel.The thickness of IP tunnel and different service quality (Qualityof Service is called for short " QoS ") classification and different CSN are relevant.Chain of command comprises that IP tunnel is set up and because the mobile control protocols such as tunnel release that produce of terminal.In addition, chain of command also comprises charging protocol (Authentication, Authorization, Account are called for short " AAA "), strategy and QoS execution or the like agreement.Interface R4 mainly define with ASN between relevant chain of command and the loading end agreement of mobility.

CSN is defined as to the WiMAX terminal IP is provided Connection Service.CSN provides mainly that the IP address assignment, Internet of following function: SS/MSS insert, AAA proxy or server, serve (as location-based business, multi-medium multi-packet broadcasting and broadcasting service, IP Multimedia System business) based on user's authorization control, the ASN tunnel between the CSN, switching and the various WiMAX between the ASN under the tunnel of CSN, WiMAX user's charging and the clearing between the operator, the roaming condition.

MSS/SS is (moving) subscriber equipment, and the user uses this devices accessing WiMAX network.

When MSS when an ASN moves to another ASN, may need Interface R3 is moved, to guarantee the correct transmission of user data.Specifically, the difference according to the mobile IP type of MSS can be divided into two kinds of situations.For the MSS that mobile IP type is a proxy-mobile IP, the transition process of Interface R3 as shown in Figure 3, before migration, the ASN of BS and current service and the external agent of service (Foreign Agent, be called for short " FA ") remain with the contextual information of Interface R3, when Interface R3 need move, send the R3 relocation request by ASN to authenticator and mobile IP customer terminal, send the request message of mobile IP registration again to target ASN_GW and target FA by authenticator and mobile IP customer terminal, target ASN_GW and target FA are forwarded to this request message home agent (the Home Agent of MSS again, be called for short " HA "), transfer by target ASN_GW and target FA, after authenticator and mobile IP customer terminal acquisition the mobile IP registration request responding message from HA, return the response message of Interface R3 migration to the ASN that initiates the Interface R3 migration request, set up the new contextual information of this Interface R3 by BS and target ASN_GW and target FA, and the old contextual information of this Interface R3 is with deleted.

For the MSS that mobile IP type is a client mobile IP, the transition process of Interface R3 as shown in Figure 4, its process and Fig. 3 are roughly the same, the migration of distinguishing the Interface R3 of the MSS that only is proxy-mobile IP realizes by the agency, and the migration of the Interface R3 of the MSS of client mobile IP is initiated voluntarily by this MSS.

In actual applications, there is following problem in such scheme: the migration of Interface R3 may have influence on the quality of service of MSS.

Cause the main cause of this situation to be, in the prior art, the migration of Interface R3 is to carry out at MSS to switch the flow process that carry out separately the back.And, after MSS carries out switching, if desired Interface R3 is moved, then need to set up earlier the data channel of information interaction when being used to move, carry out the migration flow process of R3 again, increased the total handover delay of MSS greatly, therefore, have influence on the performance of MSS when switching/migration possibly.

Summary of the invention

In view of this, main purpose of the present invention is to provide the moving method and the system thereof of Interface R3 in a kind of microwave access global intercommunication network, makes the total handover delay of MS be minimized.

For achieving the above object, the invention provides the moving method of Interface R3 in a kind of microwave access global intercommunication network, comprise following steps:

Network side is in the switch step of travelling carriage, whether need migration to make a strategic decision to the Interface R3 between access service network and connectivity serving network in the anchor network of this travelling carriage, if decision is moved this Interface R3, then the target anchor network is obtained from former anchor network and is carried out the required contextual information of described migration, carries out the Interface R3 transition process according to this contextual information.

Wherein, access service network and external agent in the described former anchor network, or access service network and couple in router, whether when receiving the request message of described switching, carrying out described Interface R3 needs the decision-making of moving.

In this external described method, if access service network and external agent in the described former anchor network, or access service network and couple in router, described migration is carried out in decision, then access service network and external agent in described target anchor network, or access service network and couple in router, in the handoff request message that sends, carry described contextual information, access service network and external agent in this target anchor network, or access service network and couple in router, from this handoff request message of receiving, obtain described contextual information.

In this external described method, access service network and external agent in the described target anchor network, or access service network and couple in router, receiving from access service network and external agent in the described former anchor network, or access service network and couple in router, the request message of described switching the time, whether carry out described Interface R3 needs the decision-making of moving.

In this external described method, if access service network and external agent in the described target anchor network, or access service network and couple in router, described migration is carried out in decision, then access service network and external agent in described former anchor network, or access service network and couple in router, in the switching response message of returning, carry the indication information that carries out described Interface R3 migration;

Access service network and external agent in the described former anchor network, or access service network and couple in router, access service network and the external agent in described target anchor network, or access service network and couple in router, in the switch acknowledgment message that sends, carry described contextual information, access service network and external agent in this target anchor network, or access service network and couple in router, from this switch acknowledgment message of receiving, obtain described contextual information.

In this external described method, access service network and external agent in the described target anchor network, or access service network and couple in router, whether when the request message of described switching that receives from the access service network of service, carrying out described Interface R3 needs the decision-making of moving.

In this external described method, if access service network and external agent in the described target anchor network, or access service network and couple in router, described migration is carried out in decision, then in the switching response message that the access service network to described service returns, carry the indication information that carries out described Interface R3 migration;

The access service network of described service is access service network and external agent in described target anchor network, or access service network and couple in router, in the switch acknowledgment message that sends, the contextual information relevant that carries in this access service network to be possessed with described migration, if entrained contextual information is imperfect or do not carry, access service network and the external agent in this target anchor network then, or access service network and couple in router, access service network and external agent in described former anchor network, or access service network and couple in router, ask its required contextual information.

In this external described method, carry indication information in the described switching response message that the target anchor network is returned, be used for indicating the access service network of described service to provide which contextual information to finish the migration of Interface R3 in follow-up flow process.

In this external described method, access service network and external agent after if the R6 data channel between target access service network gateway and target BS is set up successfully in the described target anchor network, or access service network and couple in router, also do not receive described switch acknowledgment message, access service network and the external agent in described former anchor network then, or access service network and couple in router, ask described contextual information.

In this external described method, access service network and external agent in the described former anchor network, or access service network and couple in router, when receiving switch acknowledgment message, carry out described Interface R3 and whether need the decision-making of moving, if described migration is carried out in decision, then access service network and external agent in described target anchor network, or access service network and couple in router, in the switch acknowledgment message that sends, carry described contextual information, access service network and external agent in this target anchor network, or access service network and couple in router, from this switch acknowledgment message of receiving, obtain described contextual information.

In this external described method, described contextual information comprises one of following or its combination in any:

" Anchor DPF Info ", " Anchor SFA Info ", " Anchor DHCP proxy/relayInfo ", " Accounting Info ", " Authentication Info ", " MIP Info " and " Idle Info ".

In this external described method, when the mobile IP type of described travelling carriage is proxy-mobile IP, access service network and external agent in the described target anchor network, or access service network and couple in router, the step of carrying out the Interface R3 transition process comprises following substep:

R6 data channel when between target access service network gateway and target BS is set up successfully, perhaps, access service network and external agent in described target anchor network, or access service network and couple in router, when receiving switch acknowledgment message, access service network and external agent in this target anchor network, or access service network and couple in router are to the migration request of proxy mobile IP customer terminal transmission Interface R3.

In this external described method, when the mobile IP type of described travelling carriage is client mobile IP, access service network and external agent in the described target anchor network, or access service network and couple in router, the step of carrying out the Interface R3 transition process comprises following substep:

R6 data channel when between target access service network gateway and target BS is set up successfully, access service network and external agent in this target anchor network, or access service network and couple in router, send request this mobile station proxy broadcasting or routing broadcast message to described travelling carriage, triggering terminal is initiated the mobile IP registration process.

The present invention also provides the migratory system of Interface R3 in a kind of microwave access global intercommunication network, comprise at least one travelling carriage, at least two access service network, connectivity serving network and at least two anchor network, the decision-making module that in described anchor network, also comprises the Interface R3 migration that is used to make a strategic decision between access service network and connectivity serving network, and the acquisition module that is used to obtain contextual information;

Switch step at described travelling carriage, whether need migration to make a strategic decision by the decision-making module in former anchor network or the target anchor network to the Interface R3 of this travelling carriage, if this decision-making module decision is moved this Interface R3, then the acquisition module in the indicating target anchor network obtains from former anchor network and carries out the required contextual information of described migration, and according to the contextual information that is obtained this Interface R3 is moved.

By relatively finding, the main distinction of technical scheme of the present invention and prior art is, the switch step of MSS to the anchor network of this MSS in Interface R3 between ASN and CSN whether need migration to make a strategic decision, if decision is moved this Interface R3, then the target anchor network is obtained the required contextual information of Interface R3 migration from former anchor network, and this Interface R3 is moved to this locality.Be placed on the switch step of MSS owing to the OPPORTUNITY ON DECISION-MAKING that whether Interface R3 is needed move, therefore can utilize the mutual signaling in the switching flow to carry the required contextual information of Interface R3 migration, and need not to set up for the migration of Interface R3 individually to carry out interacting message, the feasible switching flow of eating dishes without rice or wine and the migration flow process of Interface R3 combine more closely, reduce the mutual of information, thereby reduced handover delay.

Network side can be provided with the OPPORTUNITY ON DECISION-MAKING of whether carrying out the Interface R3 migration flexibly, such as, by ASN in the former anchor network and FA, or ASN and couple in router (Access Router, abbreviation " AR ") when receiving handoff request, carries out the decision-making whether Interface R3 moves, if the decision migration then is carried at required contextual information ASN and the FA that sends in the handoff request message in the target anchor network, or ASN and AR; Perhaps, by ASN in the former anchor network and FA, or ASN and AR, when receiving switch acknowledgment message, carry out the decision-making whether Interface R3 moves, if the decision migration then is carried at required contextual information ASN and the FA that sends in the switch acknowledgment message in the target anchor network, or ASN and AR.In addition, also can be by ASN in the target anchor network and FA, or ASN and AR, when receiving handoff request message, carry out the decision-making whether Interface R3 moves, if decision migration, then in the switching response message of returning, carry the indication information that carries out the Interface R3 migration, by ASN and the FA in service ASN and/or the former anchor network, or ASN and AR, at ASN in the target anchor network and FA, or ASN and AR, required contextual information carried in the switch acknowledgment message of transmission.

For the mobile IP type MSS that is proxy-mobile IP, ASN in the target anchor network and FA, or ASN and AR, when receiving switch acknowledgment message, send the migration request of Interface R3 to proxy mobile IP customer terminal, for the mobile IP type MSS that is client mobile IP, ASN in the target anchor network and FA, or ASN and AR, when receiving switch acknowledgment message, send the message that this MSS of request initiates the Interface R3 migration to this MSS, make the reentry process of the process of Target cell and R3 relocation of this MSS can walk abreast and carry out, reduce handover delay, thereby improved the service quality of business when switching.

Description of drawings

Fig. 1 is the end-to-end reference model schematic diagram of WiMAX in the prior art;

Fig. 2 is the reference model schematic diagram of ASN in the prior art;

Fig. 3 is the Interface R3 migration flow chart of the MSS of proxy-mobile IP in the prior art;

Fig. 4 is the Interface R3 migration flow chart of the MSS of client mobile IP in the prior art;

Fig. 5 is the moving method flow chart according to Interface R3 in the WiMAX system of first embodiment of the invention;

Fig. 6 is the moving method flow chart according to Interface R3 in the WiMAX system of second embodiment of the invention;

Fig. 7 is the moving method flow chart according to Interface R3 in the WiMAX system of third embodiment of the invention;

Fig. 8 is the moving method flow chart according to Interface R3 in the WiMAX system of four embodiment of the invention.

Embodiment

For making the purpose, technical solutions and advantages of the present invention clearer, the present invention is described in further detail below in conjunction with accompanying drawing.

Core of the present invention is, network side is in the switch step of MSS, whether the Interface R3 to this MSS needs migration to make a strategic decision, if then utilize mutual signaling in the handoff procedure to make ASN and FA in the target anchor network or ASN and AR, get access to and carry out the required contextual information of this Interface R3 migration, and carry out the migration of Interface R3 according to this contextual information, thus reduced the total handover delay of MSS, improved user experience.

More than principle of the present invention has been done simple declaration, be described in detail according to the moving method of this principle below Interface R3 in the first execution mode WiMAX system of the present invention.

As shown in Figure 5, in step 501, MSS sends handoff request to service ASN.Specifically, when MSS when switching condition satisfies, send handoff request message trigger handoff procedure to service ASN.

Then, enter step 502, ASN and the FA of service ASN in former anchor network, or ASN and AR send handoff request.Specifically, after the handoff request that the handover (mih) functions of service ASN sends MSS was handled, ASN in former anchor network and FA, or ASN and AR sent handoff request message, carried the target BS situation by service ASN decision-making in this message.

Then, enter step 503, ASN in the former anchor network and FA, or ASN and AR, whether decision-making needs to carry out the migration of Interface R3, and when decision is moved, at ASN in the target anchor network and FA, or ASN and AR, carry in the handoff request message of transmission and carry out the required contextual information of this Interface R3 migration.

Specifically, ASN in the former anchor network and FA, or ASN and AR, during this handoff request of ASN entity handles at place, can further determine to satisfy the target BS situation of qos requirement, simultaneously ASN and the FA in the former anchor network, or ASN and AR, according to present its resource situation, whether professional conditions such as qos requirement judgement needs the MSS that current request is switched is done the migration of Interface R3 between ASN and CSN, just this Interface R3 is moved among the new FA.If judgement is for moving this Interface R3, ASN and FA in the then former anchor network, or ASN and AR, ASN in sending to the target anchor network and FA, or ASN and AR, handoff request message in, carry and carry out the required contextual information of Interface R3 migration, require target ASN when MSS switches to this ASN, do the migration of Interface R3 simultaneously.ASN in the former anchor network and FA, or ASN and AR, ASN in sending to the target anchor network and FA, or ASN and AR, handoff request message in, the entrained required contextual information of Interface R3 migration that carries out comprises: " Anchor DPF Info ", " Anchor SFA Info ", " Anchor DHCP proxy/relay Info ", " Accounting Info ", " Authentication Info ", " MIP Info ", " Idle Info " or the like.By ASN in the former anchor network and FA, or ASN and AR, when receiving handoff request, carry out the decision-making whether Interface R3 moves, if decision migration then utilizes ASN and the FA in the target anchor network of sending in the switching flow, or ASN and AR, handoff request carry the required contextual information of Interface R3 migration, the feasible switching flow of eating dishes without rice or wine and the migration flow process of Interface R3 combine more closely, have reduced the mutual of information, thereby have reduced handover delay.

Then, enter step 504, ASN in the target anchor network and FA, or ASN and AR, ASN in former anchor network and FA, or ASN and AR return switching response message, and carry the answer that whether receives this Interface R3 migration in this response message.Specifically, ASN in the target anchor network and FA, or ASN and AR, handover (mih) functions receive ASN and FA in the former anchor network, or ASN and AR are after the handoff request message of transmission, handle this handoff request, and confirm whether can accept the migration of Interface R3.If accept R3 relocation, then be kept at and entrainedly in this handoff request carry out the required contextual information of Interface R3 migration, and in switching response message, carry the information that receives this Interface R3 migration, the Interface R3 that expression prepares to accept this MSS is moved to this locality.

Then, enter step 505, ASN in the former anchor network and FA, or ASN and AR, receiving from ASN in the target anchor network and FA, or ASN and AR, switching response message after, confirmed that target FA receives the migration of this Interface R3, and sent switching response message to service ASN.

Then, enter step 506, service ASN returns handoff response to the MSS that initiates switching flow, indicates this MSS can begin to switch.Then, in step 507, this MSS switches the back in decision and switches indication to service ASN transmission.

Then, enter step 508, ASN is after the switch indicating information of receiving from MSS in service, is notified to ASN and FA in the former anchor network or ASN and AR with switch acknowledgment message.Again in step 509, by ASN in the former anchor network and FA, or ASN and AR, notify ASN and FA in the target anchor network or ASN and AR with this switch acknowledgment message.

Step 506 to step 509 is finished the existing handoff procedure of eating dishes without rice or wine.

Then, enter step 510 or 510 ', target ASN or target FA carry out the required contextual information of Interface R3 migration according to what get access to, carry out the transition process of Interface R3.

Specifically, the difference according to the mobile IP type of MSS can be divided into two kinds of situations.For the MSS that mobile IP type is a client mobile IP, enter step 510, target ASN or target FA are when receiving switch acknowledgment message, send the notification message " Mobility Advertisement " that this MSS of request initiates Interface R3 migration flow process to this MSS, after this migration flow process is same as the prior art, and Interface R3 is moved among the new FA.Because ASN and FA in the target anchor network, or ASN and AR, the time illustrate that when receiving switch acknowledgment message this MSS has confirmed to switch to local BS, therefore, send message that request this MSS initiate Interface R3 migration to this MSS this moment, can make the reentry process of the process of Target cell and R3 relocation of this MSS can walk abreast and carry out, reduce handover delay, thereby improved the service quality of business when switching.Certainly, ASN in the target anchor network and FA, or ASN and AR, also can after setting up successfully, the R6 data channel between target ASN_GW and target BS send the message that this MSS of request initiates the Interface R3 migration to this MSS again, this be because, if the R6 data channel is set up successfully, illustrate that then this MSS has successfully reentried Target cell.If the foundation of R6 data channel success is before receiving switch acknowledgment message, then need not by the time, switch acknowledgment message just can directly send " Mobility Advertisement " message.

For the MSS that mobile IP type is a proxy-mobile IP, then enter step 510 ', target ASN or target FA are when receiving switch acknowledgment message, when confirming that just this MSS will switch among the local BS, proxy mobile IP customer terminal entity to this MSS sends the Interface R3 migration request message, the migration of Interface R3 is carried out in requirement, and migration flow process after this is same as the prior art, and Interface R3 is moved among the new FA.Similarly, ASN in the target anchor network and FA, or ASN and AR, also can be after the R6 data channel between target ASN_GW and target BS is set up successfully send the Interface R3 migration request message to the proxy mobile IP customer terminal entity of this MSS again, if the foundation of R6 data channel success is before receiving switch acknowledgment message, then need not by the time, switch acknowledgment message just can directly send this Interface R3 migration request message.

Need to prove, present embodiment also is applicable to ASN and the FA in service ASN and the former anchor network fully, or ASN and AR, situation in an entity, ASN and FA in service ASN and the former anchor network have just been reduced, or ASN and AR, information interaction, do not influence the flow process that Interface R3 migration is made a strategic decision and carried out.

In the second execution mode WiMAX system of the present invention the moving method of Interface R3 as shown in Figure 6, step 601 is identical with step 501 and step 502 respectively with step 602.

In step 603, ASN in the former anchor network and FA, or ASN and AR, ASN in the target anchor network and FA, or ASN and AR, send handoff request, in this step, ASN in the former anchor network and FA, or ASN and AR, whether do not need migration to make a strategic decision, not at ASN in the target anchor network and FA to Interface R3 yet, or ASN and AR, carry in the handoff request message of transmission and carry out the required contextual information of Interface R3 migration.

In step 604, ASN in the target anchor network and FA, or ASN and AR, ASN in former anchor network and FA, or ASN and AR return handoff response, and this step is same as the prior art.

Step 605 is identical to step 508 to step 608 and step 505, does not repeat them here.

In step 609, ASN in the former anchor network and FA, or ASN and AR, whether decision-making needs to carry out the migration of Interface R3, and when decision is moved, at ASN in the target anchor network and FA, or ASN and AR, carry in the switch acknowledgment message of transmission and carry out the required contextual information of this Interface R3 migration.

Specifically, ASN in the former anchor network and FA, or ASN and AR are according to present its resource situation, whether professional conditions such as qos requirement judgement needs the MSS that current request is switched is done the migration of Interface R3 between ASN and CSN, just this Interface R3 is moved among the new FA.If judgement is for moving this Interface R3, ASN and FA in the then former anchor network, or ASN and AR, ASN in sending to the target anchor network and FA, or ASN and AR, switch acknowledgment message in, carry and carry out the required contextual information of Interface R3 migration, require target ASN when MSS switches to this ASN, do the migration of Interface R3 simultaneously.ASN in the former anchor network and FA, or ASN and AR, ASN in sending to the target anchor network and FA, or ASN and AR, switch acknowledgment message in, the entrained required contextual information of Interface R3 migration that carries out comprises: " AnchorDPF Info ", " Anchor SFA Info ", " Anchor DHCP proxy/relay Info ", " Accounting Info ", " Authentication Info ", " MIP Info ", " Idle Info " or the like.

Then, enter step 610 or step 610 ', step 610 and step 610 ' respectively and step 510 and step 510 ', do not repeat them here.

Be not difficult to find, the present embodiment and first execution mode are roughly the same, its difference only is, in the first embodiment, and ASN in the former anchor network and FA, or ASN and AR, when receiving handoff request, carry out the decision-making whether Interface R3 moves, if the decision migration then is carried at required contextual information ASN and the FA that sends in the handoff request message in the target anchor network, or ASN and AR; And in the present embodiment, ASN in the former anchor network and FA, or ASN and AR, when receiving switch acknowledgment message, carry out the decision-making whether Interface R3 moves, if decision migration, then required contextual information is carried at ASN and the FA that sends in the switch acknowledgment message in the target anchor network, or ASN and AR.

In the 3rd execution mode WiMAX system of the present invention the moving method of Interface R3 as shown in Figure 7, step 701 is identical with step 501 and step 502 respectively with step 702.In step 703, ASN in the former anchor network and FA, or ASN and AR, ASN in the target anchor network and FA, or ASN and AR, send handoff request message, in this step, ASN in the former anchor network and FA, or ASN and AR, not to Interface R3 whether need the migration make a strategic decision or make a strategic decision but the result of decision for not moving Interface R3, at ASN in the target anchor network and FA, or ASN and AR, do not carry any required contextual information of Interface R3 migration that carries out in the handoff request message of transmission.

Then, enter step 704, ASN in the target anchor network and FA, or ASN and AR, according to it supports former situation at present, whether professional conditions such as qos requirement judgement needs the MSS that current request is switched is done the migration of Interface R3 between ASN and CSN, just this Interface R3 is moved among this FA.If judgement is for moving this Interface R3, ASN and the FA in the target anchor network then, or ASN and AR, ASN in sending to former anchor network and FA, or ASN and AR, switching response message in, carry the indication information that carries out the Interface R3 migration, according to the contextual information of its this MSS that has, carry indication information simultaneously, be used for indicating former grappling ASN to provide which contextual information to finish the migration of Interface R3 in follow-up flow process.

Step 705 is identical to step 508 with step 505 respectively to step step 708, does not repeat them here.

In step 709, because ASN and FA in the former anchor network, or ASN and AR, according to indication information entrained in the switching response message of receiving, know and to carry out the migration of Interface R3, therefore, in this step, ASN in the former anchor network and FA, or ASN and AR are at ASN in the target anchor network and FA, or ASN and AR, in the switch acknowledgment message that sends, carry the information of agreeing to carry out the Interface R3 migration, comprise in this information and carry out the required contextual information of Interface R3 migration.

If ASN in the target anchor network and FA, or ASN and AR, after the R6 data channel between target ASN_GW and target BS is set up successfully, promptly when this MSS successfully reentries Target cell, also do not receive switch acknowledgment message, then enter step 710, ASN and the FA of active in former anchor network, or ASN and AR, send a request message, acquisition request is carried out the required contextual information of Interface R3 migration, and in step 711, ASN in the former anchor network and FA, or ASN and AR, after receiving this request message, this contextual information is returned to ASN and FA in the target anchor network or ASN and AR.Need to prove, if ASN in the target anchor network and FA, or ASN and AR, before setting up successfully, the R6 data channel received switch acknowledgment message, then skips steps 710 and step 711.

Step 712 and step 712 ' respectively and step 510 or 510 ' identical, do not repeat them here.

Be not difficult to find, the present embodiment and first execution mode are roughly the same, its difference only is, in the first embodiment, and ASN in the former anchor network and FA, or ASN and AR, when receiving handoff request, carry out the decision-making whether Interface R3 moves, if the decision migration then is carried at required contextual information ASN and the FA that sends in the handoff request message in the target anchor network, or ASN and AR; And in the present embodiment, by ASN in the target anchor network and FA, or ASN and AR, when receiving handoff request message, carry out the decision-making whether Interface R3 moves, if decision migration, then in the switching response message of returning, carry the indication information that carries out the Interface R3 migration, by ASN in the former anchor network and FA, or ASN and AR, at ASN in the target anchor network and FA, or ASN and AR, required contextual information carried in the switch acknowledgment message of transmission.

The moving method and the 3rd execution mode of Interface R3 are roughly the same in the 4th execution mode WiMAX system of the present invention, its difference only is, ASN and the FA of handoff request message in the former anchor network, or ASN and AR, directly send to ASN and FA in the target anchor network or ASN and AR by service ASN.Therefore, ASN in the target anchor network and FA, or ASN and AR, the indication information that carries out the Interface R3 migration that carries in switching response message directly sends to service ASN.

As shown in Figure 8, in step 801, when MSS when switching condition satisfies, send handoff request message trigger handoff procedure to service ASN.

Then, enter step 802, service ASN is ASN in the target anchor network and FA directly, or ASN and AR, sends handoff request message.Because ASN and the FA of handoff request message in the former anchor network, or ASN and AR, therefore ASN and the FA in the former anchor network, or ASN and AR can't judge whether to carry out the migration of Interface R3.

Then, enter step 803, whether ASN in the target anchor network and FA, or ASN and AR need migration to make a strategic decision to Interface R3, if decision migration, then carry the indication information that carries out the Interface R3 migration in the switching response message of returning to service ASN, indication need be carried out the migration of Interface R3, and the while is according to the contextual information of its this MSS that has, carry indication information, be used for indicating former grappling ASN to provide which contextual information to finish the migration of Interface R3 in follow-up flow process.

Step 804 corresponds respectively to step 706 in step 707 with step 805.

In step 806, ASN is at ASN in the target anchor network and FA in service, or ASN and AR, in the switch acknowledgment message of transmission, carry among this ASN to be possessed with the relevant contextual information of Interface R3 migration.Because switch acknowledgment message directly sends to ASN and FA in the target anchor network by service ASN, or ASN and AR, in, ASN and FA in the former anchor network, or ASN and AR, so possibly can't carry in the switch acknowledgment message and carry out all information that the Interface R3 migration needs, move required contextual information but can carry the Interface R3 that is used for of serving ASN.

If contextual information entrained in this switch acknowledgment message is imperfect, then enter step 807, ASN in the target anchor network and FA, or ASN and AR, ASN and the FA of active in former anchor network, or ASN and AR, send a request message, the Interface R3 that carries out that acquisition request is complete moves required contextual information, and in step 808, ASN in the former anchor network and FA, or ASN and AR, after receiving this request message, this contextual information is returned to ASN and FA in the target anchor network or ASN and AR.Otherwise, if in this switch acknowledgment message, carried complete contextual information, then skips steps 807 and step 808.

Need to prove, if ASN in the target anchor network and FA, or ASN and AR are after the R6 data channel between target ASN GW and target BS is set up successfully, promptly when this MSS successfully reentries Target cell, also do not receive switch acknowledgment message, still need enter step 807 and step 808, by ASN in the target anchor network and FA, or ASN and AR, ASN in former anchor network and FA, or ASN and AR obtain the complete Interface R3 that carries out and move required contextual information.

Then, enter step 809 and step 809 ', step 809 and step 809 ' respectively and step 510 or 510 ' identical do not repeat them here.

The migratory system of Interface R3 comprises at least one MSS, at least two ASN, CSN and at least two anchor network in the 5th execution mode WiMAX network of the present invention.And, in anchor network, also comprise the decision-making module of the Interface R3 migration that is used to make a strategic decision between ASN and CSN and the acquisition module that is used to obtain contextual information.

Specifically, switch step at MSS, by in the former anchor network or the decision-making module in the target anchor network whether need migration to make a strategic decision to the Interface R3 of this MSS, if this decision-making module decision is moved this Interface R3, then the acquisition module in the indicating target anchor network obtains the required contextual information of migration that carries out this Interface R3 from former anchor network, and carries out the migration of this Interface R3 according to the contextual information that is obtained.Because the OPPORTUNITY ON DECISION-MAKING whether Interface R3 is needed to move has been placed on the switch step of MSS, so can utilize the mutual signaling in the switching flow to carry the required contextual information of Interface R3 migration, reduce the mutual of information, thereby reduced handover delay.

Though pass through with reference to some of the preferred embodiment of the invention, the present invention is illustrated and describes, but those of ordinary skill in the art should be understood that and can do various changes to it in the form and details, and without departing from the spirit and scope of the present invention.

Claims

1. the moving method of Interface R3 in the microwave access global intercommunication network is characterized in that, comprises following steps:

2. the moving method of Interface R3 in the microwave access global intercommunication network according to claim 1, it is characterized in that, access service network and external agent in the described former anchor network, or access service network and couple in router, whether when receiving the request message of described switching, carrying out described Interface R3 needs the decision-making of moving.

3. the moving method of Interface R3 in the microwave access global intercommunication network according to claim 2, it is characterized in that, if access service network and external agent in the described former anchor network, or access service network and couple in router, described migration is carried out in decision, then access service network and external agent in described target anchor network, or access service network and couple in router, in the handoff request message that sends, carry described contextual information, access service network and external agent in this target anchor network, or access service network and couple in router obtain described contextual information from this handoff request message of receiving.

4. the moving method of Interface R3 in the microwave access global intercommunication network according to claim 1, it is characterized in that, access service network and external agent in the described target anchor network, or access service network and couple in router, receiving from access service network and external agent in the described former anchor network, or access service network and couple in router, the request message of described switching the time, whether carry out described Interface R3 needs the decision-making of moving.

5. the moving method of Interface R3 in the microwave access global intercommunication network according to claim 4, it is characterized in that, if access service network and external agent in the described target anchor network, or access service network and couple in router, described migration is carried out in decision, then access service network and external agent in described former anchor network, or access service network and couple in router, in the switching response message of returning, carry the indication information that carries out described Interface R3 migration;

6. the moving method of Interface R3 in the microwave access global intercommunication network according to claim 1, it is characterized in that, access service network and external agent in the described target anchor network, or access service network and couple in router, whether when the request message of described switching that receives from the access service network of service, carrying out described Interface R3 needs the decision-making of moving.

7. the moving method of Interface R3 in the microwave access global intercommunication network according to claim 6, it is characterized in that, if access service network and external agent in the described target anchor network, or access service network and couple in router, described migration is carried out in decision, then in the switching response message that the access service network to described service returns, carry the indication information that carries out described Interface R3 migration;

8. according to the moving method of Interface R3 in claim 5 or the 7 described microwave access global intercommunication networks, it is characterized in that, carry indication information in the described switching response message that the target anchor network is returned, be used for indicating the access service network of described service to provide which contextual information to finish the migration of Interface R3 in follow-up flow process.

9. according to the moving method of Interface R3 in claim 5 or the 7 described microwave access global intercommunication networks, it is characterized in that, access service network and external agent after if the R6 data channel between target access service network gateway and target BS is set up successfully in the described target anchor network, or access service network and couple in router, also do not receive described switch acknowledgment message, access service network and the external agent in described former anchor network then, or access service network and couple in router, ask described contextual information.

10. the moving method of Interface R3 in the microwave access global intercommunication network according to claim 1, it is characterized in that, access service network and external agent in the described former anchor network, or access service network and couple in router, when receiving switch acknowledgment message, carry out described Interface R3 and whether need the decision-making of moving, if described migration is carried out in decision, then access service network and external agent in described target anchor network, or access service network and couple in router, in the switch acknowledgment message that sends, carry described contextual information, access service network and external agent in this target anchor network, or access service network and couple in router obtain described contextual information from this switch acknowledgment message of receiving.

11. the moving method according to Interface R3 in each described microwave access global intercommunication network in the claim 1 to 7 is characterized in that, described contextual information comprises one of following or its combination in any:

12. moving method according to Interface R3 in each or the 10 described microwave access global intercommunication networks in the claim 1 to 7, it is characterized in that, when the mobile IP type of described travelling carriage is proxy-mobile IP, access service network and external agent in the described target anchor network, or access service network and couple in router, the step of carrying out the Interface R3 transition process comprises following substep:

13. moving method according to Interface R3 in each or the 10 described microwave access global intercommunication networks in the claim 1 to 7, it is characterized in that, when the mobile IP type of described travelling carriage is client mobile IP, access service network and external agent in the described target anchor network, or access service network and couple in router, the step of carrying out the Interface R3 transition process comprises following substep:

14. the migratory system of Interface R3 in the microwave access global intercommunication network, comprise at least one travelling carriage, at least two access service network, connectivity serving network and at least two anchor network, it is characterized in that, the decision-making module that in described anchor network, also comprises the Interface R3 migration that is used to make a strategic decision between access service network and connectivity serving network, and the acquisition module that is used to obtain contextual information;