CN102300273B - Switching method and device in WIMAX (Worldwide Interoperability for Microware Access) system - Google Patents
Switching method and device in WIMAX (Worldwide Interoperability for Microware Access) system Download PDFInfo
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- CN102300273B CN102300273B CN201010219235.1A CN201010219235A CN102300273B CN 102300273 B CN102300273 B CN 102300273B CN 201010219235 A CN201010219235 A CN 201010219235A CN 102300273 B CN102300273 B CN 102300273B
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Abstract
The invention discloses a switching method and device in a WIMAX (Worldwide Interoperability for Microware Access) system, which are used for realizing seamless switching of a mobile terminal between base stations in the WIMAX system. The switching method comprises the steps that: a target base station receives a switching request message initiated by a service base station of the mobile terminal, wherein the switching request message carries indication information of the mobile terminal supporting the seamless switching; the target base station determines seamless switching information for the mobile terminal when confirming that the target base station supports the seamless switching and establishes a GRE (Generic Routing Encapsulation) tunnel between the target base station and an access gateway according to the received switching request message, and sends a switching response message carrying the seamless switching information to the service base station, and the service base station forwards the switching response message to the mobile terminal; and the target base station sends a downlink data packet received through the established GRE tunnel to the mobile terminal when receiving a switching confirmation message sent by the service base station after the mobile terminal carries out distribution and initialization of local wireless resources, and controls the mobile terminal to be switched from the service base station to the target base station.
Description
Technical field
The present invention relates to moving communicating field, relate in particular to the method and apparatus of the switching in a kind of WIMAX (micro-wave access global inter communication) system.
Background technology
WIMAX (Worldwide Interoperability for Microwave Access, micro-wave access global inter communication) to have introduced a kind of new switching mode be seamless switching to 802.16e agreement, the object of seamless switching is to ensure MS (Mobile Station, mobile terminal) at two BS (Base Station, base station) between handoff procedure in the continuity of data, can not there is the interruption of data.Existing handoff procedure is reentry stage TBS (the Target BS switching, target BS) by RNG_RSP (Ranging_Response, ranging response) message by for MS distribute Basic CID (Basic Cell Identification, basic connection identifier), TEK (Traffic Encryption Key, traffic encryption key) information and the out of use Transport CID of MS (transmission connection identifier) carry to MS.And seamless switching process is to be that MS distributes Basic CID, TEK information at the preparatory stage TBS switching, the out of use Transport CID of TBS instruct MS simultaneously; SBS (Serving BS, serving BS) carries above-mentioned information to MS by MOB_BSHO_RSP (base station handoff response) message, and MOB_BSHO_RSP message is used to indicate the generation that MS switches; MS is according to the out of use Transport CID of the Basic CID carrying in MOB_BSHO_RSP message, TEK information and MS, can be self and distribute Basic CID, Primary CID (Primary Cell Identification, main connection identifier) and Transport CID, sending MOB_HO_IND (terminal is switched confirmation) message at MS prepares after TBS switching, TBS just can send downstream data packet to MS, can effectively reduce the loss of data for the successional TBS of supported data not.
In existing WIMAX technology, only that 802.16e agreement is described seamless switching, and NWG (Network Working Group, network working group) agreement is not described seamless switching, make the preallocated Basic CID of TBS, the out of use Transport CID of TEK information and MS cannot pass through R6 (Reference Point R6, reference point R6), R8 (Reference Point R8, reference point R8) related news carry to SBS, TBS also just cannot send downstream data packet to MS in advance, therefore cannot realize seamless switching.Perfect in the urgent need to NWG agreement is carried out in visible prior art, so that WIMAX system can be supported seamless switching.
Summary of the invention
The embodiment of the present invention provides changing method and the equipment in a kind of WIMAX system, in order to realize the seamless switching of mobile terminal between base station in WIMAX system.
The embodiment of the present invention provides the changing method in a kind of WIMAX system, comprising:
The handover request HO_REQ message that the serving BS of target BS mobile terminal receive is initiated, carries mobile terminal and supports the indication information of seamless switching in described HO_REQ message;
Described target BS is according to the HO_REQ message receiving, confirm self while supporting seamless switching, to be that mobile terminal is determined seamless switching information and set up the generic route encapsulation gre tunneling between IAD, and the seamless switching information of determining is carried in handoff response HO_RSP message and sends to serving BS, by serving BS, described seamless switching information is transmitted to mobile terminal;
Described target BS receives serving BS carries out sending after the distribution of local wireless sources and initialization complete according to the seamless switching information receiving switching at mobile terminal while confirming HO_Confirm message, the downstream data packet receiving from IAD by the gre tunneling of setting up is sent to mobile terminal, and control the switching of mobile terminal from serving BS to target BS.
The embodiment of the present invention provides a kind of base station equipment, comprising:
Receiver module, the handover request HO_REQ message of initiating for the serving BS of mobile terminal receive, carries mobile terminal and supports the indication information of seamless switching in described HO_REQ message;
Determination module, for according to the HO_REQ message receiving, confirms self while supporting seamless switching, to be that mobile terminal is determined seamless switching information and set up the generic route encapsulation gre tunneling between IAD;
Sending module, sends to serving BS for the seamless switching information of determining is carried to HO_RSP message, by serving BS, described seamless switching information is transmitted to mobile terminal;
Switching controls module, while confirming HO_Confirm message for receiving serving BS carries out sending after the distribution of local wireless sources and initialization complete according to the seamless switching information receiving switching at mobile terminal, the downstream data packet receiving from IAD by the gre tunneling of setting up is sent to mobile terminal, and control the switching of mobile terminal from serving BS to target BS.
The embodiment of the present invention provides the changing method in another kind of micro-wave access global inter communication WIMAX system, comprising:
The terminal handover request MOB_MSHO_REQ message that the serving BS mobile terminal receive of mobile terminal sends, while confirming that described mobile terminal is supported seamless switching, initiate handover request HO_REQ message to target BS, in described HO_REQ message, carry the indication information of mobile terminal support seamless switching;
Receive the handoff response HO_RSP message that described target BS sends according to described HO_REQ message, in described HO_RSP message, carry the seamless switching information of the mobile terminal of determining when target BS confirmation self is supported seamless switching;
The seamless switching information of mobile terminal is transmitted to mobile terminal by serving BS, and carry out according to the seamless switching information receiving at mobile terminal sending to switch to target BS after the distribution of local wireless sources and initialization complete confirming HO_Confirm message.
The embodiment of the present invention provides another kind of base station equipment, comprising:
Initiation module, the terminal handover request MOB_MSHO_REQ message sending for mobile terminal receive, while confirming that described mobile terminal is supported seamless switching, initiate handover request HO_REQ message to target BS, in described HO_REQ message, carry the indication information of mobile terminal support seamless switching;
Receiver module, the handoff response HO_RSP message sending according to described HO_REQ message for receiving described target BS, the seamless switching information of carrying the mobile terminal of determining when target BS confirmation self is supported seamless switching in described HO_RSP message;
Sending module, for being transmitted to mobile terminal by the seamless switching information of mobile terminal;
Control module, confirms HO_Confirm message for sending to switch to target BS after carrying out the distribution of local wireless sources and initialization at mobile terminal according to the seamless switching information receiving and completing.
Changing method and equipment in the WIMAX system that the embodiment of the present invention provides, in the handover request message sending to target BS at serving BS, carry and support the indication information of seamless switching to support seamless switching to show mobile terminal, and the switching response message sending to serving BS by target BS is that the seamless switching information that mobile terminal is determined is finally carried to mobile terminal by target BS, having realized in the preparatory stage of switching is mobile terminal preassignment seamless switching information, after mobile terminal is prepared to switch to target BS, target BS just can send downstream data packet to mobile terminal, ensure the consistency of mobile terminal and target BS seamless switching information, thereby realize the seamless switching of mobile terminal between base station.
Other features and advantages of the present invention will be set forth in the following description, and, partly from specification, become apparent, or understand by implementing the present invention.Object of the present invention and other advantages can be realized and be obtained by specifically noted structure in write specification, claims and accompanying drawing.
Brief description of the drawings
Fig. 1 is the changing method implementing procedure schematic diagram in embodiment of the present invention WIMAX system;
Fig. 2 is a kind of possible structural representation of embodiment of the present invention TBS;
Fig. 3 is the changing method implementing procedure schematic diagram in embodiment of the present invention WIMAX system;
Fig. 4 is a kind of possible structural representation of embodiment of the present invention SBS;
Fig. 5 is the seamless switching Establishing process schematic diagram that embodiment of the present invention MS initiates.
Embodiment
In order to realize the seamless switching of MS between base station in WIMAX system, the embodiment of the present invention provides changing method and the equipment in a kind of WIMAX system.
Below in conjunction with Figure of description, the preferred embodiments of the present invention are described, be to be understood that, preferred embodiment described herein is only for description and interpretation the present invention, be not intended to limit the present invention, and in the situation that not conflicting, the feature in embodiment and embodiment in the present invention can combine mutually.
As shown in Figure 1, the changing method in the WIMAX system that the embodiment of the present invention provides, comprises the steps:
S101, TBS receive HO_REQ (handover request) message of the SBS initiation of MS, carry the indication information of MS support seamless switching in this HO_REQ message;
In concrete enforcement, MS is in moving process, when available TBS detected, just can send MOB_MSHO_REQ (terminal handover request) message request to SBS and switch, SBS receives after MOB_MSHO_REQ message, judges whether MS supports seamless switching, if MS supports seamless switching, SBS just initiates HO_REQ message request to TBS and switches, and in HO_REQ message, carries the indication information of MS support seamless switching, and this MS of instruction TBS supports seamless switching;
It should be noted that, described HO_REQ message can be R6_HO_REQ (R6 interface handover request) message, can be also R8_HO_REQ (R8 interface handover request) message; The R6_HO_REQ message that SBS initiates sends to TBS via AGW (IAD); The R8_HO_REQ message that SBS initiates directly sends to TBS.
S102, TBS are according to the HO_REQ message receiving, confirm self while supporting seamless switching, to be that MS determines seamless switching information and sets up GRE (the Generic RoutingEncapsulation between IAD, generic route encapsulation) tunnel, and the seamless switching information of determining is carried in HO_RSP (handoff response) message and sends to SBS, by SBS, this seamless switching information is transmitted to MS;
In concrete enforcement, TBS is receiving after the HO_REQ message of SBS transmission, also support seamless switching just can determine seamless switching information and set up the gre tunneling between IAD for MS according to self-ability, and the seamless switching information of the MS determining is carried in HO_RSP message and sends to SBS, SBS receives after HO_RSP message, seamless switching information is carried to MOB_BSHO_RSP (base station handoff response) message repeating to MS, makes MS carry out distribution and the initialization of local wireless sources according to seamless switching information;
It should be noted that, described HO_RSP message can be R6_HO_RSP (R6 interface handoff response) message, can be also R8_HO_RSP (R8 interface handoff response) message; The R6_HO_RSP message that TBS initiates sends to SBS via AGW (IAD); The R8_HO_RSP message that TBS initiates directly sends to SBS;
Wherein R6 interface refers to the interface between AGW (IAD) and BS, comprise chain of command and medium surface two parts, chain of command is supported mobile management (switching, Idle, paging), safety management, the management of medium surface data path etc., medium surface is supported gre tunneling encapsulation, and R6 interface can forward switching message, the radio resource management messages etc. between BS; R8 interface refers to the interface between BS and BS, by can direct communication between R8 interface BS, and when being applied to MS and moving between BS, for quick seamless handoff, can direct interaction signaling between BS.
When S103, TBS receive HO_Confirm (switch and the confirm) message that SBS carries out according to the seamless switching information receiving at MS sending after the distribution of local wireless sources and initialization complete, the downstream data packet receiving from IAD by the gre tunneling of setting up is sent to MS, and control the switching of MS from SBS to TBS;
In concrete enforcement, MS is after the distribution and initialization that complete local wireless sources, the TBS that will be switched to by sending MOB_HO_IND (terminal is switched confirmation) message informing SBS, SBS is by sending HO_Confirm (switch and confirm) message informing TBS, TBS is receiving after the HO_Confirm message of SBS transmission, learn that MS agrees to carry out seamless switching, the downstream data packet receiving from IAD by the gre tunneling of setting up is sent to MS, and be MS distribution ascending resource, afterwards, RNG_REQ (distance measurement request) message that the request that TBS reception MS sends re-accesses, MS is receiving after RNG_RSP (ranging response) message that TBS returns, send zero bandwidth request message to TBS, notice TBS has re-accessed, TBS is receiving after zero bandwidth request message, the switching of this MS of notice SBS completes, SBS initiates the release flow process of the resource that follow-up MS takies.
In concrete enforcement, when TBS confirms that self supports seamless switching, the seamless switching information definite for MS comprises: be the preallocated Basic CID of MS (basic connection identifier), TEK (traffic encryption key) information and the out of use Transport CID of MS (transmission connection identifier).It should be noted that, the AK context that TBS has only obtained MS could produce SA (Security Association), SA comprises TEK information, and therefore TBS determines TEK information after the AK of MS (Authentication Key, authenticate key) context obtains successfully; In concrete enforcement, TBS sets up the gre tunneling between IAD by the pre-registration flow process of R6 data tunnel.If when TBS does not support seamless switching according to self-ability, send to SBS just can not support the indication information of seamless switching to be carried in HO_RSP message TBS.
In concrete enforcement, MS is receiving after the MOB_BSHO_RSP message of the seamless switching information that carries the MS that TBS determines that SBS sends, learn that TBS agrees to carry out seamless switching, the selected TBS that finally will switch, carry out distribution and the initialization of local seamless switching resource simultaneously, specifically comprise: the initialization of Basic CID (basic connection identifier), the distribution of Primary CID (main connection identifier), the renewal of TEK information, the distribution of Transport CID.
Based on same inventive concept, changing method and a kind of SBS equipment in a kind of TBS equipment, another kind of WIMAX system are also provided in the embodiment of the present invention, because the principle that these equipment are dealt with problems with method is similar to the changing method in above-mentioned WIMAX system, therefore the enforcement of these equipment and method can be referring to the enforcement of the changing method in above-mentioned WIMAX system, repeats part and repeat no more.
As shown in Figure 2, a kind of possible structural representation of TBS equipment, comprising:
Receiver module 201, the HO_REQ message of initiating for receiving the SBS of MS, carries MS and supports the indication information of seamless switching in this HO_REQ message;
Determination module 202, for according to the HO_REQ message receiving, confirms self while supporting seamless switching, to be that MS determines seamless switching information and sets up the gre tunneling between IAD;
Sending module 203, sends to SBS for the seamless switching information of determining is carried to HO_RSP message, by SBS, this seamless switching information is transmitted to MS;
Switching controls module 204, when receiving the HO_Confirm message that SBS carries out according to the seamless switching information receiving at MS sending after the distribution of local wireless sources and initialization complete, the downstream data packet receiving from IAD by the gre tunneling of setting up is sent to MS, and control the switching of MS from SBS to TBS.
For convenience of description, the each several part of above TBS equipment is divided into each module (or unit) according to function and describes respectively.Certainly, in the time that enforcement is of the present invention, the function of each module (or unit) can be realized in same or multiple software or hardware.
As shown in Figure 3, the changing method in the another kind of WIMAX system that the embodiment of the present invention provides, comprises the steps:
The SBS of S301, MS receives MOB_MSHO_REQ (terminal handover request) message that MS sends, while confirming that this MS supports seamless switching, initiate HO_REQ (handover request) message to TBS, in this HO_REQ message, carry the indication information of MS support seamless switching;
S302, SBS receive HO_RSP (handoff response) message that TBS sends according to HO_REQ message, carry the seamless switching information of the MS determining while confirming TBS self support seamless switching in this HO_RSP message;
The seamless switching information of MS is transmitted to MS by S303, SBS;
In concrete enforcement, SBS is carried at MOB_BSHO_RSP (base station handoff response) message repeating to MS by the seamless switching information of MS;
S304, SBS carry out according to the seamless switching information receiving at MS after the distribution of local wireless sources and initialization complete sending HO_Confirm message to TBS.
As shown in Figure 4, a kind of possible structural representation of SBS equipment, comprising:
Initiation module 401, the MOB_MSHO_REQ message sending for receiving MS, while confirming that this MS supports seamless switching, initiates HO_REQ message to TBS, carries the indication information of MS support seamless switching in this HO_REQ message;
Receiver module 402, the HO_RSP message sending according to HO_REQ message for receiving TBS, the seamless switching information of carrying the MS determining when TBS confirmation self is supported seamless switching in this HO_RSP message;
Sending module 403, for being transmitted to the seamless switching information of MS to MS;
Control module 404, sends HO_Confirm message for carrying out according to the seamless switching information receiving at MS after the distribution of local wireless sources and initialization complete to TBS.
For convenience of description, the each several part of above SBS equipment is divided into each module (or unit) according to function and describes respectively.Certainly, in the time that enforcement is of the present invention, the function of each module (or unit) can be realized in same or multiple software or hardware.
Those of ordinary skill in the art are known, and the TBS equipment described in the embodiment of the present invention and SBS equipment are named with respect to the switching of MS, and for example, for two base station BSs 1 and BS2, if MS is switched to BS2 from BS1, BS1 is SBS, and BS2 is TBS; Otherwise if MS is switched to BS1 from BS2, BS2 is SBS, BS1 is TBS.
In order to understand better embodiments of the present invention, illustrate the switching flow in WIMAX system, suppose to carry out interacting message by R6 interface between SBS and TBS.Execution mode in the embodiment of the present invention is applicable to the switching of MS or BS initiation, and for convenience of description, the example that switches to of initiating with MS in the invention process describes, and as shown in Figure 5, the switching flow in WIMAX system, comprises the steps:
S501, MS send MOB_MSHO_REQ message to SBS, and request is switched;
S502～S503, SBS send R6_HO_REQ message by AGW to TBS, wherein carry Seamless HO mode flag TLV (MS supports the indication information of seamless switching), and the MS that instruction is initiated to switch supports seamless switching;
S504～S505, TBS send R6_MS_Context_Req (AK) message, the AK context of acquisition request MS to AGW; The AK context that AGW gets MS returns to R6_MS_Context_Rsp (AK) message afterwards, wherein carries the AK context getting;
The AK context that TBS gets MS produces SA afterwards, and SA comprises TEK information, and TEK information is that TBS is that MS produces;
S506～S508, TBS send R6_DP_PreReg_Req (request) message to AGW, carry out the pre-registration of R6 data tunnel, set up in advance the gre tunneling of TBS and AGW (IAD); AGW returns to R6_DP_PreReg_Rsp (response) message, the pre-registration success of instruction R6 data tunnel; TBS sends R6_DP_PreReg_Ack (confirmation) message to AGW after receiving R6_DP_PreReg_Rsp message;
S509～S510, TBS send R6_HO_RSP message by AGW to SBS, wherein carry the seamless switching information of MS, the AK context that is included as the preallocated Basic CID of MS, the out of use TransportCID of MS and MS obtains the TEK information of successfully determining afterwards;
S511, SBS send MOB_BSHO_RSP (base station handoff response) message to MS, and be that the seamless switching information that MS determines is carried to MS by MOB_BSHO_RSP message by TBS, MS learns that TBS agrees to carry out seamless switching after receiving MOB_BSHO_RSP message, and the selected final TBS switching carries out distribution and the initialization of local seamless switching resource;
S512～S513, SBS send R6_HO_ACK (message is accepted in R6 switching) to TBS;
S514, MS complete according to seamless switching information after the distribution and initialization of seamless switching resource, send MOB_HO_IND (terminal is switched confirmation) message, the TBS that instruction SBS finally will be switched to SBS;
S515～S516, SBS send R6_HO_Confirm (R6 switches confirmation) message by AGW to TBS;
S517～S518, TBS return to R6_HO_ACK (R6 switches acceptance) message by AGW to SBS;
S519, TBS confirm that MS has completed distribution and the initialization of local seamless switching resource, sends to MS by the downstream data packet receiving from AGW by gre tunneling;
S520, TBS are that MS distributes ascending resource;
S521, MS send RNG_REQ (distance measurement request) message to TBS, initiate to re-access flow process;
S522, AGW and TBS carry out the registration of R6 data tunnel;
S523, AGW and TBS carry out CMAC (Cipher-based Message Authentication Code, based on the message authentication code of ciphertext) more new technological process of KEY COUNT, CMAC key count value for re-accessing, the playback protection of position update flow;
S524, TBS return to RNG_RSP (ranging response) message to MS, represent to have re-accessed;
S525～S526, TBS send R6_HO_Complete (R6 has switched) message by AGW to SBS, and notice SBS seamless switching completes;
S527～S528, SBS by AGW to TBS loopback R6_HO_ACK (R6 switches acceptance) message;
S529, SBS carry out the release of the resource that follow-up MS takies.
In concrete enforcement, between SBS and TBS, also can carry out interacting message by R8 interface.While carrying out interacting message by R8 interface between SBS and TBS, between switching flow and SBS and TBS, carry out the switching flow of interacting message by R6 interface basically identical, specific implementation process can be referring to the implementing procedure that carries out interacting message between SBS and TBS by R6 interface, and difference comprises:
S502～S503 is replaced with to following steps: SBS directly sends R8_HO_REQ (R8 handover request) message to TBS, in this R8_HO_REQ message, carry Seamless HO mode flag (MS supports the indication information of seamless switching), the MS that instruction is initiated to switch supports seamless switching;
S509～S510 is replaced with to following steps: TBS directly sends R8_HO_RSP message to SBS, wherein carry the seamless switching information of MS, the AK context that is included as the preallocated Basic CID of MS, the out of use Transport CID of MS and MS obtains the TEK information of successfully determining afterwards;
S515～S516 is replaced with to following steps: SBS directly sends R8_HO_Confirm (R8 switches confirmation) message to TBS;
S517～S518 is replaced with to following steps: TBS returns to R6_HO_ACK (R6 switches acceptance) message by AGW to SBS;
S525～S526 is replaced with to following steps: TBS directly sends R8_HO_Complete (R8 has switched) message to SBS, notice SBS seamless switching completes;
S527～S528 is replaced with to following steps: SBS is directly to TBS loopback R8_HO_ACK (R8 switches acceptance) message.
In embodiments of the present invention, the message of needs amendment is as shown in Table 1 and Table 2:
Table 1 R6_HO_REQ and R8_HO_REQ
| Symbol | Essential/optional | Annotation |
| ?MS?Info | Essential | |
| ?＞Seamless?HO?mode?flag | Optional | While supporting seamless switching, to carry |
| ?…………………………… |
In R6_HO_REQ message and R8_HO_REQ message, except outside original TLV (Type LengthValue, type length numerical value), also need to carry Seamless HO mode flag (MS supports the indication information of seamless switching);
Table 2 R6_HO_RSP and R8_HO_RSP
| Symbol | Essential/optional | Annotation |
| ?MS?Info | Essential | |
| ?＞PreAllocated?Basic?CID | Optional | While supporting seamless switching, to carry |
| ?＞Seamless?HO?mode?flag | Optional | Whether instruction TBS supports seamless switching |
| ?＞Rejected?Transport?CID?bitmap | Optional | While supporting seamless switching, to carry |
| ?＞SF?Info(one?or?more) | Optional | |
| ?＞＞SAID | Optional | While supporting seamless switching, to carry |
| ?＞SA?Descriptor | Optional | While supporting seamless switching, to carry |
| ?＞＞SAID | Optional | |
| ?＞＞SA?Index | Optional | |
| ?＞＞SA?Type | Optional | |
| ?＞＞Newer?TEK?Parameters | Optional | While supporting seamless switching, to carry |
| ?＞＞＞TEK?Lifetime | Optional | While supporting seamless switching, to carry |
| ?……………………………… |
In R6_HO_RSP message and R8_HO_RSP message except original TLV, also need to carry PreAllocated Basic CID (preallocated basic CID), Seamless HO mode flag (TBS supports the indication information of seamless switching), Rejected Transport CID bitmap (the unacceptable transmission CID bitmap of TBS), SAID (Security Association mark), SA Descriptor (Security Association descriptor), NewerTEK Parameters (new TEK parameter) and TEK Lifetime (life time of TEK information).
Changing method and equipment in the WIMAX system that the embodiment of the present invention provides, in the handover request message sending to TBS at SBS, carry and support the indication information of seamless switching to support seamless switching to show MS, and the switching response message sending to SBS by TBS is that the seamless switching information that MS determines is finally carried to MS by TBS, having realized in the preparatory stage of switching is MS preassignment seamless switching information, after MS prepares to switch to TBS, TBS just can send downstream data packet to MS, ensure the consistency of MS and TBS seamless switching information, thereby realize the seamless switching of MS between base station.
Obviously, those skilled in the art can carry out various changes and modification and not depart from the spirit and scope of the present invention the present invention.Like this, if these amendments of the present invention and within modification belongs to the scope of the claims in the present invention and equivalent technologies thereof, the present invention is also intended to comprise these changes and modification interior.
Claims (13)
1. the changing method in micro-wave access global inter communication WIMAX system, is characterized in that, comprising:
The handover request HO_REQ message that the serving BS of target BS mobile terminal receive is initiated, carries mobile terminal and supports the indication information of seamless switching in described HO_REQ message;
Described target BS is according to the HO_REQ message receiving, confirm self while supporting seamless switching, to be that mobile terminal is determined seamless switching information and set up the generic route encapsulation gre tunneling between IAD, and the seamless switching information of determining is carried in handoff response HO_RSP message and sends to serving BS, by serving BS, described seamless switching information is transmitted to mobile terminal;
Described target BS receives serving BS carries out sending after the distribution of local wireless sources and initialization complete according to the seamless switching information receiving switching at mobile terminal while confirming HO_Confirm message, the downstream data packet receiving from IAD by the gre tunneling of setting up is sent to mobile terminal, and control the switching of mobile terminal from serving BS to target BS.
2. the method for claim 1, it is characterized in that, described seamless switching information is included as the preallocated basic connection identifier Basic CID of mobile terminal, traffic encryption key TEK information and the out of use transmission connection identifier of mobile terminal Transport CID.
3. method as claimed in claim 2, is characterized in that, described target BS is determined described TEK information after the AK of mobile terminal context obtains successfully;
Described target BS is set up the gre tunneling between IAD by the pre-registration flow process of R6 data tunnel.
4. the method as described in claim 1,2 or 3, is characterized in that, described target BS receives the HO_REQ message that serving BS is initiated, and specifically comprises:
Described target BS receives the terminal handover request MOB_MSHO_REQ message that serving BS sends according to the mobile terminal receiving, while confirming that described mobile terminal is supported seamless switching, and the HO_REQ message of transmission.
5. the method for claim 1, is characterized in that, serving BS is carried at base station handoff response MOB_BSHO_RSP message repeating to mobile terminal by the seamless switching information of mobile terminal.
6. method as claimed in claim 5, is characterized in that, described target BS receives serving BS and carries out the HO_Confirm message sending after the distribution of local wireless sources and initialization complete at mobile terminal according to the seamless switching information receiving, and specifically comprises:
Described mobile terminal receives after MOB_BSHO_RSP message, and the selected target BS switching also carries out distribution and the initialization of local seamless switching resource, switches confirmation MOB_HO_IND message informing serving BS prepare the target BS being switched to by terminal;
The MOB_HO_IND message that serving BS sends according to described mobile terminal, confirmation mobile terminal agrees to carry out seamless switching, sends HO_Confirm message to described target BS.
7. method as claimed in claim 6, it is characterized in that, the distribution of described local seamless switching resource and initialization, specifically comprise: the initialization of Basic CID, the distribution of main connection identifier Primary CID, the renewal of TEK information, the distribution of Transport CID.
8. the method for claim 1, is characterized in that, the switching of mobile terminal from serving BS to target BS carried out in target BS control, specifically comprises:
Target BS is that mobile terminal distributes ascending resource, and the distance measurement request RNG_REQ message that re-accesses of request that sends of mobile terminal receive;
Target BS returns to ranging response RNG_RSP message after mobile terminal is re-accessed, and mobile terminal receive is according to the zero bandwidth request message of described RNG_RSP message transmission;
Target BS is according to described zero bandwidth request message, and the switching of mobile terminal completes described in notification service base station, and instruction serving BS discharges the resource that described mobile terminal takies.
9. the method for claim 1, is characterized in that, also comprises:
Described target BS, according to the HO_REQ message receiving, while confirming that self does not support seamless switching, is not supported the indication information of seamless switching to be carried in HO_RSP message target BS and is sent to serving BS.
10. the method for claim 1, is characterized in that,
Described HO_REQ message comprises R6 interface handover request R6_HO_REQ message or R8 interface handover request R8_HO_REQ message;
Described HO_RSP message comprises R6 interface handoff response R6_HO_RSP message or R8 interface handoff response R8_HO_RSP message.
11. 1 kinds of base station equipments, is characterized in that, comprising:
Receiver module, the handover request HO_REQ message of initiating for the serving BS of mobile terminal receive, carries mobile terminal and supports the indication information of seamless switching in described HO_REQ message;
Determination module, for according to the HO_REQ message receiving, confirms self while supporting seamless switching, to be that mobile terminal is determined seamless switching information and set up the generic route encapsulation gre tunneling between IAD;
Sending module, sends to serving BS for the seamless switching information of determining is carried to HO_RSP message, by serving BS, described seamless switching information is transmitted to mobile terminal;
Switching controls module, while confirming HO_Confirm message for receiving serving BS carries out sending after the distribution of local wireless sources and initialization complete according to the seamless switching information receiving switching at mobile terminal, the downstream data packet receiving from IAD by the gre tunneling of setting up is sent to mobile terminal, and control the switching of mobile terminal from serving BS to target BS.
Changing method in 12. 1 kinds of micro-wave access global inter communication WIMAX systems, is characterized in that, comprising:
The terminal handover request MOB_MSHO_REQ message that the serving BS mobile terminal receive of mobile terminal sends, while confirming that described mobile terminal is supported seamless switching, initiate handover request HO_REQ message to target BS, in described HO_REQ message, carry the indication information of mobile terminal support seamless switching;
Receive the handoff response HO_RSP message that described target BS sends according to described HO_REQ message, in described HO_RSP message, carry the seamless switching information of the mobile terminal of determining when target BS confirmation self is supported seamless switching;
The seamless switching information of mobile terminal is transmitted to mobile terminal by serving BS, and carry out according to the seamless switching information receiving at mobile terminal sending to switch to target BS after the distribution of local wireless sources and initialization complete confirming HO_Confirm message.
13. 1 kinds of base station equipments, is characterized in that, comprising:
Initiation module, the terminal handover request MOB_MSHO_REQ message sending for mobile terminal receive, while confirming that described mobile terminal is supported seamless switching, initiate handover request HO_REQ message to target BS, in described HO_REQ message, carry the indication information of mobile terminal support seamless switching;
Receiver module, the handoff response HO_RSP message sending according to described HO_REQ message for receiving described target BS, the seamless switching information of carrying the mobile terminal of determining when target BS confirmation self is supported seamless switching in described HO_RSP message;
Sending module, for being transmitted to mobile terminal by the seamless switching information of mobile terminal;
Control module, confirms HO_Confirm message for sending to switch to target BS after carrying out the distribution of local wireless sources and initialization at mobile terminal according to the seamless switching information receiving and completing.
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| CN101272602A (en) * | 2007-03-21 | 2008-09-24 | 华为技术有限公司 | Method, system and device for switching between networks |
| CN101500282A (en) * | 2008-02-01 | 2009-08-05 | 华为技术有限公司 | Method, base station and terminal for indicating validity of system information |
| CN101686492A (en) * | 2008-09-22 | 2010-03-31 | 中兴通讯股份有限公司 | Method and device for processing ROHC service flow based on WiMAX system |
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| CN101272602A (en) * | 2007-03-21 | 2008-09-24 | 华为技术有限公司 | Method, system and device for switching between networks |
| CN101500282A (en) * | 2008-02-01 | 2009-08-05 | 华为技术有限公司 | Method, base station and terminal for indicating validity of system information |
| CN101686492A (en) * | 2008-09-22 | 2010-03-31 | 中兴通讯股份有限公司 | Method and device for processing ROHC service flow based on WiMAX system |
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