CN102595492B - Robust header compression (ROHC) service flow processing method and device based on worldwide interoperability for microwave access (WiMAX) system - Google Patents
Robust header compression (ROHC) service flow processing method and device based on worldwide interoperability for microwave access (WiMAX) system Download PDFInfo
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Abstract
The invention discloses a robust header compression (ROHC) service flow processing method and an ROHC service flow processing device based on a worldwide interoperability for microwave access (WiMAX) system. The method comprises the following steps of: accessing to a service network gateway or anchoring the service network gateway and a base station, and interacting the base station and a mobile terminal; and changing an ROHC service flow which is successfully established and carries a ROHC feedback service flow into the ROHC service flow which doses not carry the ROHC feedback service flow or the service flow which doses not carry a ROHC characteristic. According to the technical scheme provided by the invention, a process for disposing the condition that the establishment of the ROHC feedback service flow is failed is provided during primary establishment or switching, so that the normal operation of a system can be ensured.
Description
The application is the divisional application of " ROHC processing method for service stream and device based on WiMAX system ", the applying date of original application is on September 22nd, 2008, application number is 200810211433.6, and invention and created name is ROHC processing method for service stream based on WiMAX system and device.
Technical field
The present invention relates to communication technical field, particularly relate to based on micro-wave access to global intercommunication (Worldwide Interoperability for Microwave Access, referred to as WiMAX) robust header compression (Robust Header Compression, referred to as the ROHC) processing method for service stream of system and device.
Background technology
ROHC defines IP layer and with the Efficient Compression algorithm of the head on upper strata, has carried out specific definition in the documents such as RFC3095, RFC3759 that the method is issued at IETF; ROHC channel one end is compressor reducer, the other end is decompression machine, after compressor reducer compresses the header of datagram of input by ROHC transmission to decompression machine, decompression machine recovers the head compressed, wherein, the function of compressor reducer and decompression machine all belongs to ROHC function.
Defining the ROHC parameter of each ROHC channel in RFC document, in these parameters, comprise an optional parameters---ROHC feedback channel identifies; If comprise ROHC feedback channel mark in the ROHC parameter of ROHC channel, then the decompressor of this ROHC channel one end can be transferred to the feedback information produced in decompression process the compressor reducer of the ROHC channel other end by ROHC feedback channel, thus improves accuracy and the compression efficiency of compression.Also only when there is ROHC feedback channel, the compact model of ROHC just can from unidirectional mode (Unidirectional Mode, referred to as U-Mode) transfer bidirectional optimistic mode (Bidirectional Optimistic mode to, referred to as O-Mode) or bidirectional reliable mode (Bidirectional Reliable Mode, referred to as R-Mode).U-Mode does not have ROHC feedback channel, but O-Mode and R-Mode needs ROHC feedback channel.
In wimax, for improving access service network bandwidth utilization efficiency, particularly air interface radio resources efficiency, need to support ROHC feature, ROHC business is even more important to VoIP business support, to the speech business of IPv6, IP head is 40 bytes, can boil down to byte by ROHC.
Under WiMAX supports ROHC situation, ROHC channel or ROHC feedback channel and Business Stream one_to_one corresponding, the i.e. corresponding ROHC Business Stream of ROHC channel, ROHC feedback channel correspondence ROHC feedback traffic stream; If certain ROHC channel needs ROHC feedback channel, then need to set up ROHC Business Stream and ROHC feedback traffic stream simultaneously; In actual mechanical process, ROHC feedback traffic stream may set up failure, therefore needs to set up ROHC feedback traffic stream unsuccessfully to process, to ensure that system can normally be run.But also do not set up failed processing procedure for ROHC feedback traffic stream in WiMAX system at present.
Summary of the invention
In view of this, the invention provides the ROHC business flow establishing method based on WiMAX system and device, set up failed processing procedure to provide for ROHC feedback traffic stream in WiMAX system.
According to an aspect of the present invention, provide a kind of ROHC processing method for service stream based on WiMAX system, the method is applied to the scene that ROHC Business Stream is successfully established and the foundation of the ROHC feedback traffic stream of its correspondence is failed.
ROHC processing method for service stream based on WiMAX system according to the present invention comprises: access service network gateway or grappling access service network gateway and base station, and base station and mobile terminal carry out alternately, by setting up successfully with the ROHC Business Stream of ROHC feedback traffic stream, change to without the ROHC Business Stream of ROHC feedback traffic stream or the Business Stream without ROHC characteristic.
According to another aspect of the present invention, a kind of access service network gateway is provided.
Access service network gateway according to the present invention comprises: detection module and change module.Wherein, when detection module is used for needing to set up ROHC Business Stream and the ROHC feedback traffic stream corresponding with ROHC Business Stream at the same time, whether detection ROHC Business Stream and ROHC feedback traffic stream are set up successful; Change module to be used for detecting that ROHC Business Stream is successfully established and ROHC feedback traffic stream is set up unsuccessfully at detection module, by carrying out alternately with base station and mobile terminal, by setting up successfully with the ROHC Business Stream of ROHC feedback traffic stream, change to without the ROHC Business Stream of ROHC feedback traffic stream or the Business Stream without ROHC characteristic.
According to a further aspect of the invention, provide another ROHC business flow establishing method based on WiMAX system, the method is applied to handoff preparation phase when mobile terminal is switched to target BS from serving BS.
ROHC business flow establishing method based on WiMAX system according to the present invention comprises: target BS receives the handover request message from serving BS, the process of pre-established data channel is initiated, to set up ROHC Business Stream and ROHC feedback traffic stream corresponding to ROHC Business Stream to grappling access service network gateway; Whether target BS sends response message to serving BS, wherein, carry and indicate ROHC Business Stream and the foundation of ROHC feedback traffic stream successfully to identify in this response message; Serving BS sends handover request or switching response message to mobile terminal, wherein, carries candidate list of base stations in this handover request or switching response message.
According to a further aspect of the invention, a kind of base station is provided.
Comprise according to the invention provides iron-based station: receiver module, pre-established module and sending module.Wherein, receiver module is for receiving the handover request message from another base station; Pre-established module is used for after receiver module receives handover request message, initiates the process of pre-established data channel, to set up the ROHC feedback traffic stream of ROHC Business Stream and correspondence thereof to grappling access service network gateway; After the pre-established data channel process that sending module is used for initiating in pre-established module completes, send response message to another base station, wherein, whether this response message carries ROHC Business Stream and the foundation of ROHC feedback traffic stream thereof in instruction base station and successfully identifies.
By at least one scheme above-mentioned of the present invention, in first foundation or when switching, ROHC feedback traffic stream can be provided to set up failed processing procedure, thus the normal operation of system can be ensured.
Other features and advantages of the present invention will be set forth in the following description, and, partly become apparent from specification, or understand by implementing the present invention.Object of the present invention and other advantages realize by structure specifically noted in write specification, claims and accompanying drawing and obtain.
Accompanying drawing explanation
Accompanying drawing is used to provide a further understanding of the present invention, and forms a part for specification, together with embodiments of the present invention for explaining the present invention, is not construed as limiting the invention.In the accompanying drawings:
Fig. 1 is the concrete implementing procedure figure of embodiment one;
Fig. 2 is the concrete implementing procedure figure of embodiment two;
Fig. 3 is the concrete implementing procedure figure of embodiment three;
Fig. 4 A is the structured flowchart of the ASN GW according to the embodiment of the present invention;
Fig. 4 B is the structured flowchart of ASN GW according to the preferred embodiment of the invention;
Fig. 5 is the flow chart of a kind of ROHC processing method for service stream based on WiMAX system according to the embodiment of the present invention;
Fig. 6 is the concrete implementing procedure figure of embodiment four;
Fig. 7 is the concrete implementing procedure figure of embodiment five;
Fig. 8 is the structured flowchart of the BS according to the embodiment of the present invention.
Embodiment
Functional overview
As mentioned above, the demand of failed processing procedure is set up for ROHC feedback traffic stream in WiMAX system, the embodiment of the present invention proposes, based on the ROHC business flow establishing method of WiMAX system and device, unsuccessfully to process in order to set up ROHC feedback traffic stream in WiMAX system.
At mobile terminal (Mobile Station, referred to as MS) network after, if need to set up the ROHC channel with ROHC feedback channel mark, then need at MS and base station and base station and access service network gateway (Access Service Network Gate Way, referred to as ASN GW) between set up two Business Streams, article one, be the Business Stream that ROHC channel is corresponding, i.e. ROHC Business Stream; Another is the Business Stream that ROHC feedback channel is corresponding, i.e. ROHC feedback traffic stream.In the process setting up ROHC Business Stream and ROHC feedback traffic stream, if ROHC feedback traffic stream is set up unsuccessfully, then ASN GW and base station and base station and MS carry out alternately, by setting up successfully with the ROHC Business Stream of ROHC feedback traffic stream, change to without the ROHC Business Stream of ROHC feedback traffic stream or the Business Stream without ROHC characteristic.Embodiments provide three kinds of processing methods particularly will to be successfully established but the ROHC feedback traffic stream of its correspondence sets up failed ROHC Business Stream, change to without the ROHC Business Stream of ROHC feedback traffic stream or the Business Stream without ROHC characteristic: method one, the ROHC functive (i.e. MS and ASN GW) at notice ROHC channel two ends is held consultation, and allows being successfully established ROHC channel and not supporting ROHC feedback channel; Method two, discharges the ROHC channel set up, re-establishes the ROHC Business Stream not having ROHC feedback traffic stream; Method three, discharges the ROHC channel set up; Re-establish non-ROHC Business Stream, namely there is no the Business Stream of ROHC characteristic.
When MS switches, handoff procedure can be divided into handoff preparation phase and handover execution stage.Can the pre-established of data channel be carried out in handoff preparation phase, its objective is reserved related resource, and carry out data channel process of establishing in handover execution stage; Can not carry out data channel in handoff preparation phase pre-established, just carry out formal data channel in handover execution stage and set up yet.Because data channel and Business Stream are one to one, thus data channel and ROHC channel and ROHC feedback channel are also one to one, therefore no matter be handoff preparation phase or handover execution stage in handoff procedure, the situation that ROHC feedback channel can not be successfully established all may be there is between the target BS (Target Base Station, referred to as TBS) of target access service net (Target ASN) and grappling access service network gateway (Anchor ASN GW).For this kind of situation, the embodiment of the present invention is except utilizing said method in handover execution stage and processing, data channel can also be carried out in handoff preparation phase pre-established, each target BS be set up the situation notification service base station (Serving BS) of ROHC Business Stream and ROHC feedback traffic stream; Or when serving BS notification terminal candidate list of base stations, the candidate base station notification terminal that ROHC feedback traffic stream is successfully established only can be selected.
Below in conjunction with accompanying drawing, the preferred embodiments of the present invention are described, should be appreciated that preferred embodiment described herein is only for instruction and explanation of the present invention, is not intended to limit the present invention.
According to the embodiment of the present invention, provide firstly a kind of ROHC processing method for service stream based on WiMAX system, the method can be applied to first foundation or handover execution stage, and ROHC Business Stream is successfully established and the ROHC feedback traffic stream of its correspondence sets up failed scene.
In the above-mentioned methods, as ASN GW (for the first time set up) or Anchor ASN GW (handover execution stage) determines that ROHC Business Stream is set up unsuccessfully time, ASN GW or Anchor ASN GW and base station and base station and MS carry out alternately, will set up successful but that its corresponding ROHC feedback traffic stream foundation is failed ROHC Business Stream, change to without the ROHC Business Stream of ROHC feedback traffic stream or the Business Stream without ROHC characteristic.
In specific implementation process, three kinds of execution modes can be utilized will to set up successful but that the foundation of the ROHC feedback traffic stream of its correspondence is failed ROHC Business Stream, change to without the ROHC Business Stream of ROHC feedback traffic stream or the Business Stream without ROHC characteristic, with three specific embodiments (embodiment one, embodiment two and embodiment three), these three kinds of execution modes are described respectively below.Wherein, embodiment one and embodiment two to be successfully established but the ROHC feedback traffic stream of its correspondence sets up failed ROHC Business Stream by above-mentioned, change to the ROHC Business Stream without ROHC feedback traffic stream, and embodiment three to be successfully established but the ROHC feedback traffic stream of its correspondence sets up failed ROHC Business Stream by above-mentioned, change to the Business Stream without ROHC characteristic.
Embodiment one
In the present embodiment, ASN GW (setting up for the first time) or Anchor ASN GW (handover execution stage) is first (is serving BS when setting up for the first time to base station, be target BS when switching) send data channel modify request messages, then base station sends dynamic service flow modify request messages to MS, the ROHC parameter of the above-mentioned ROHC Business Stream be successfully established all is carried in data channel modify request messages and dynamic service flow modify request messages, and the value of ROHC feedback traffic stream in this ROHC parameter is invalid value, corresponding ROHC feedback traffic stream is no longer included in order to indicate the above-mentioned ROHC Business Stream set up.Value by ROHC feedback traffic stream changes to invalid value, such as 0 from the SFID setting up failed ROHC feedback traffic stream, represents that this ROHC Business Stream does not have ROHC feedback traffic stream.
Fig. 1 is the concrete implementing procedure figure of the present embodiment when setting up for the first time, as shown in Figure 1, mainly comprises the following steps:
Step S101:ASN GW sends data channel modify request messages to BS, and in this data channel modify request messages, carry the ROHC parameter of the ROHC Business Stream set up, wherein, the value of the ROHC feedback traffic stream of this ROHC parameter changes to invalid value;
Step S103:BS sends dynamic service flow modify request messages (i.e. DSC REQ message) to MS, wherein also carry the ROHC parameter of above-mentioned ROHC Business Stream in this service flow modification request message, and the value of ROHC feedback traffic stream in this ROHC parameter is invalid value;
Step S105:MS accepts BS and sends DSC REQ message, and sends dynamic service flow amendment response message (i.e. DSC RSP message) to BS;
Step S107:BS sends data channel amendment response message to ASN GW.
If in hand-off execution process, then the ASN GW in above-mentioned steps is AnchorASN GW, BS is the target BS TBS switched, i.e. Target BS.
The technical scheme provided by embodiment one can by set up but the ROHC feedback traffic stream of its correspondence to set up failed ROHC service flow modification be ROHC Business Stream without ROHC feedback traffic stream.
Embodiment two
In the present embodiment, ASN GW (setting up for the first time) or Anchor ASN GW (handover execution stage) (is serving BS when setting up for the first time by base station, be target BS when switching) carry out alternately with MS, first discharge and successfully to set up but its corresponding ROHC feedback traffic stream sets up failed ROHC Business Stream, then re-establish the ROHC Business Stream without ROHC feedback traffic stream between MS.
Fig. 2 is the concrete implementing procedure figure of the present embodiment when setting up for the first time, as shown in Figure 2, mainly comprises the following steps:
Step S201:ASN GW sends data channel and deletes message to base station; Wherein, this data channel deletion message is used to indicate deletion and has set up successful ROHC Business Stream;
Step S203: base station sends dynamic service flow to MS and deletes message after receiving this data channel deletion message, and the instruction of this message is deleted and set up successful ROHC Business Stream.
Step S205:MS sends dynamic service flow to BS and deletes response message;
Step S207: base station sends data channel to ASN GW and deletes response message;
Step S209:ASN GW sends data channel and sets up message to base station, wherein, this data channel is set up message and is used to indicate the ROHC Business Stream set up without ROHC feedback traffic stream;
Step S211: base station receives after this data channel sets up message, and send dynamic service flow to MS and add message, wherein, this dynamic service flow adds message and is used to indicate the ROHC Business Stream set up without ROHC feedback traffic stream;
Step S213:MS sends dynamic service flow and adds response message to base station;
Step S215: base station sends data channel to ASG GW and sets up response message.
Equally, if in hand-off execution process, then the ASN GW in above-mentioned steps is AnchorASN GW, BS is the target BS TBS switched, i.e. Target BS.
By the such scheme that the present embodiment provides, when the ROHC feedback channel of its correspondence is set up unsuccessfully ROHC channel is successfully established, the ROHC channel not with ROHC feedback channel can be re-established.
Embodiment three
In the present embodiment, ASN GW (setting up for the first time) or Anchor ASN GW (handover execution stage) (is serving BS when setting up for the first time by base station, be target BS when switching) carry out alternately with MS, first discharge the ROHC Business Stream with ROHC feedback traffic stream that success is set up, then re-establish the Business Stream without ROHC characteristic between MS.
Fig. 3 is the concrete implementing procedure figure of the present embodiment when setting up for the first time, as shown in Figure 3, mainly comprises the following steps:
Step S301:ASN GW sends data channel and deletes message to base station; Wherein, this data channel deletion message is used to indicate deletion and has set up successful ROHC Business Stream;
Step S303: after base station receives this data channel deletion message, send dynamic service flow to MS and delete message, this message instruct MS is deleted and set up successful ROHC Business Stream.
Step S305:MS sends dynamic service flow to BS and deletes response message;
Step S307: base station sends data channel to ASN GW and deletes response message;
Step S309:ASN GW sends data channel and sets up message to base station, wherein, this data channel is set up message and is used to indicate the Business Stream set up without ROHC characteristic;
Step S311: base station receives after this data channel sets up message, and send dynamic service flow to MS and add message, wherein, this dynamic service flow adds message and is used to indicate the Business Stream set up without ROHC characteristic;
Step S313:MS sends dynamic service flow and adds response message to base station;
Step S315: base station sends data channel to ASG GW and sets up response message.
By the such scheme that the present embodiment provides, when the ROHC feedback traffic stream of its correspondence is set up unsuccessfully ROHC Business Stream is successfully established, the ROHC Business Stream set up can be discharged, re-establishes the Business Stream of non-ROHC.
According to the embodiment of the present invention, additionally provide a kind of use ASNGW to implement the above described method.
Fig. 4 A is the structured flowchart of the ASN GW according to the embodiment of the present invention, Fig. 4 B is the structured flowchart of ASN GW according to the preferred embodiment of the invention, as shown in Figure 4 A, comprise according to the ASN GW of the embodiment of the present invention: detection module 41 and change module 43 further describe above-mentioned each module below in conjunction with accompanying drawing.
Detection module 41, during for needing at the same time to set up ROHC Business Stream and the ROHC feedback traffic stream corresponding with this ROHC Business Stream, whether detection ROHC Business Stream and ROHC feedback traffic stream are set up successful;
Change module 43 to be connected with detection module 41, for detecting that at detection module 41 above-mentioned ROHC Business Stream is successfully established and ROHC feedback traffic stream is set up unsuccessfully, by carrying out alternately with base station and mobile terminal, by setting up successfully with the ROHC Business Stream of ROHC feedback traffic stream, change to without the ROHC Business Stream of ROHC feedback traffic stream or the Business Stream without ROHC characteristic.
Particularly, as shown in Figure 4 B, above-mentioned change module can comprise respectively: first changes submodule 431, second changes submodule 433 and the 3rd change submodule 435.Wherein, first changes submodule 431 may be used for realizing the processing method that above-described embodiment one provides, second changes submodule 433 may be used for realizing the processing method that above-described embodiment two provides, and the 3rd changes submodule 435 may be used for realizing the processing method that above-described embodiment three provides.Particularly, first changes submodule is used for by sending data channel modify request messages to base station, hold consultation with mobile terminal, the value of the ROHC feedback traffic stream set up in the ROHC parameter of successful ROHC business is changed to invalid value, ROHC Business Stream is changed to the ROHC Business Stream without ROHC feedback traffic stream; Second changes submodule 433 for carrying out alternately with base station and mobile terminal, and successful ROHC Business Stream has been set up in release, and foundation and the ROHC Business Stream without ROHC feedback traffic stream between base station and mobile terminal; 3rd changes submodule 435 for carrying out alternately with base station and mobile terminal, and successful ROHC Business Stream has been set up in release, foundation and the Business Stream without ROHC characteristic between base station and mobile terminal.
According to the above-mentioned ASN GW of the embodiment of the present invention, when ROHC Business Stream is successfully established, ROHC feedback traffic stream is set up unsuccessfully, successfully can change to setting up without the ROHC Business Stream of ROHC feedback traffic stream or the Business Stream without ROHC characteristic with the ROHC Business Stream of ROHC feedback traffic stream.
According to the embodiment of the present invention, additionally provide a kind of ROHC business flow establishing method based on WiMAX system, the method is applied to handoff preparation phase when mobile terminal is switched to target BS from serving BS.
Fig. 5 is the flow chart of the ROHC business flow establishing method based on WiMAX system according to the embodiment of the present invention, and as shown in Figure 5, the method mainly comprises following process (step S501-step S505):
Step S501: target BS receives the handover request message from serving BS, initiates the process of pre-established data channel, to set up ROHC channel and ROHC feedback channel to Anchor ASN GW;
Wherein, when above-mentioned handover request message can be serving BS active initiation switching, to the handover request message that target BS sends, also can be serving BS when receiving handover request message (namely switch and initiatively initiated by MS) of MS, to the handover request message that target BS sends; Wherein, MS carries target BS list in the handover request message sent to serving BS.
Target BS is after the handover request message receiving serving BS transmission, the process of pre-established data channel is initiated to AnchorASN GW, pre-established data channel comprises reserves resource to ROHC Business Stream and ROHC feedback traffic stream corresponding to ROHC Business Stream, and target BS can determine the foundation whether success of ROHC Business Stream and ROHC feedback traffic stream.
Whether step S503: target BS sends response message to serving BS, wherein, carry in response message and indicate above-mentioned ROHC Business Stream and the foundation of ROHC feedback traffic stream successfully to identify;
Step S505: serving BS sends handover request or switching response message to mobile terminal, wherein, carries candidate list of base stations in handover request or switching response message; When sending this message, serving BS can remove ROHC feedback traffic stream and set up failed target BS in candidate list of base stations.Or, also can bring in above-mentioned handover request or switching response message and be used to indicate ROHC Business Stream and ROHC feedback traffic stream in target BS and be successfully established or the mark of failure.
In handover execution stage, MS can select a target BS comprised in handoff preparation phase (target BS comprised in the candidate list of base stations that namely serving BS returns) as the target BS switched, or according to the above-mentioned mark that serving BS returns, the target BS selecting a ROHC Business Stream and ROHC feedback traffic stream to be successfully established, as the target BS switched, can improve the success rate be successfully established at handover execution stage ROHC Business Stream and ROHC feedback traffic stream like this.Certainly, MS also can select one not appear at the target BS of the base station in handoff preparation phase as switching as target BS; Then MS is undertaken alternately by target BS and the Anchor ASN GW of the switching selected, foundation and the ROHC Business Stream between Anchor ASN GW and corresponding ROHC feedback traffic stream thereof.When to need the ROHC feedback traffic setting up ROHC Business Stream and correspondence thereof simultaneously, if ROHC Business Stream is successfully established, and ROHC feedback traffic stream is when setting up unsuccessfully, the above-mentioned ROHC of the being applied to Business Stream that the embodiment of the present invention can be adopted to provide is successfully established and ROHC processing method for service stream that ROHC feedback traffic stream sets up failed scene processes.
Initiate to switch with network side (i.e. serving BS) respectively below and initiate to switch to example with MS side, the specific implementation process of the said method that the embodiment of the present invention provides is described.
Embodiment four
The present embodiment initiates to switch to example to be described with MS side, and Fig. 6 is the implementing procedure of the present embodiment, as shown in Figure 6, mainly comprises the following steps:
Step S601:MS sends handover request message MOB MSHOREQ to serving BS, wherein, carries target BS list in this request message, has 2 target BS in target BS list in this embodiment---target BS 1 and target BS 2;
Step S603: serving BS sends handover request message HO REQ to target BS;
Step S605: the process of target BS initiation and the pre-established data channel of Anchor ASN GW;
Whether step S607: target BS sends switching response message HO RSP to serving BS, wherein, carry in this switching response message and indicate ROHC Business Stream and ROHC feedback traffic stream to set up situation, namely successfully identify;
Step S609: serving BS sends switching response message MOB BSHORSP to MS; A candidate list of base stations is carried in this response message; Serving BS according to local policy, can remove ROHC feedback traffic stream and sets up failed target BS, such as, if target BS 1ROHC feedback traffic stream is set up unsuccessfully, then only comprise target BS 2 in this candidate list of base stations from candidate station list; Or serving BS carries the ROHC feedback traffic stream being used to indicate target BS ROHC Business Stream and correspondence thereof and is successfully established or the mark of failure in switching response message, in order to notification terminal.
Embodiment five
The present embodiment initiates to switch to example to be described with network side, and Fig. 7 is the implementing procedure of the present embodiment, as shown in Figure 7, mainly comprises the following steps:
Step S701:SBS sends handover request message HO REQ to TBS;
The process of step S703:TBS initiation and the pre-established data channel of Anchor ASN, only sets up ROHC Business Stream and ROHC feedback traffic stream;
Step S705:TBS sends switching response message HO RSP to SBS, carries the mark indicating above-mentioned ROHC Business Stream and ROHC feedback traffic stream to set up situation in this response message;
Step S707:SBS sends handover request message MOB BSHO REQ to MS, and this message is with candidate list of base stations; SBS, when sending this message, according to local policy, can remove ROHC Reverse Traffic and sets up failed target BS in candidate list of base stations; Or serving BS sets up situation notification terminal the ROHC feedback traffic stream of target BS ROHC Business Stream and correspondence thereof.
According to the said method that the embodiment of the present invention provides, can in handoff preparation phase, by pre-established data channel, to set up the ROHC feedback traffic stream of ROHC Business Stream and correspondence thereof; ROHC feedback traffic stream is not set up failed target BS and is returned to MS by serving BS.Or target BS ROHC Business Stream and corresponding ROHC feedback traffic stream thereof are directly set up situation notification terminal by serving BS.
According to the embodiment of the present invention, additionally provide a kind of BS that may be used for realizing said method.
Fig. 8 is the structured flowchart of the BS according to the embodiment of the present invention, and as shown in Figure 8, the BS according to the embodiment of the present invention comprises: receiver module 81, pre-established module 83 and sending module 85.Wherein, receiver module 81 is for receiving the handover request message from another base station; Pre-established module 83 is connected with receiver module 81, for initiating the process of pre-established data channel to grappling access service network gateway, to set up ROHC Business Stream and corresponding ROHC feedback traffic stream thereof; Sending module 85 is connected with pre-established module 83, after pre-established data channel process for initiating in pre-established module 83 completes, response message is sent to another base station above-mentioned, wherein, whether this response message carries and indicates ROHC Business Stream and the foundation of ROHC feedback traffic stream in this base station successfully to identify.
By the above-mentioned BS that the embodiment of the present invention provides, when receiving handover request message, the process of pre-established data channel can be initiated, the information whether be successfully established with the ROHC feedback channel obtained between this base station and Anchor ASN GW.
As mentioned above, by the technical scheme that the embodiment of the present invention provides, can system in wimax, when ROHC Business Stream needs ROHC feedback traffic stream to support, the scene (when comprising first foundation and switch) that ROHC feedback traffic stream is not successfully established is processed, thus the normal operation of system can be ensured.
The foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, for a person skilled in the art, the present invention can have various modifications and variations.Within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (6)
1., based on a ROHC business flow establishing method for WiMAX system, be applied to handoff preparation phase when mobile terminal is switched to target BS from serving BS, it is characterized in that, described method comprises:
Described target BS receives the handover request message from described serving BS, initiates the process of pre-established data channel to grappling access service network gateway, to set up ROHC Business Stream and ROHC feedback traffic stream corresponding to described ROHC Business Stream;
Whether described target BS sends response message to described serving BS, wherein, carry and indicate described ROHC Business Stream and the foundation of ROHC feedback traffic stream successfully to identify in described response message;
Described serving BS sends handover request or switching response message to described mobile terminal, wherein, carries candidate list of base stations in described handover request or switching response message.
2. method according to claim 1, is characterized in that, does not comprise ROHC feedback traffic stream and set up failed target BS in described candidate list of base stations.
3. method according to claim 1, is characterized in that, carries and indicate the ROHC Business Stream of each target BS and ROHC feedback traffic stream to be successfully established or the mark of failure in described handover request or switching response message.
4. method according to claim 1, is characterized in that, before described target BS receives the handover request message from described serving BS, described method also comprises:
Described serving BS receives the handover request message from described mobile terminal, wherein, carries target BS list in described handover request message;
Described serving BS sends described handover request message to each target BS in described target BS list.
5. method according to claim 1, is characterized in that, at described serving BS to after described mobile terminal sends response message, described method also comprises:
Described mobile terminal selects a target BS as the target BS switched from the candidate list of base stations that described response message carries, or described mobile terminal selects a base station as the target BS switched outside described candidate list of base stations, and undertaken alternately by the target BS of described switching and described grappling access service network gateway, set up and the ROHC Business Stream between described grappling access service network gateway or ROHC Business Stream and corresponding ROHC feedback traffic stream thereof.
6. a base station, is characterized in that, comprising:
Receiver module, for receiving the handover request message from another base station;
Pre-established module, after receiving described handover request message at described receiver module, initiates the process of pre-established data channel to grappling access service network gateway, to set up the ROHC feedback traffic stream of ROHC Business Stream and correspondence thereof;
Sending module, after pre-established described data channel process for initiating in described pre-established module completes, send response message to another base station described, wherein, whether described response message carries ROHC Business Stream and the foundation of ROHC feedback traffic stream thereof in the described base station of instruction and successfully identifies.
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| CN1817007A (en) * | 2002-08-06 | 2006-08-09 | 摩托罗拉公司 | Method and apparatus for effecting a seamless handoff between IP connections |
| CN101163323A (en) * | 2006-10-09 | 2008-04-16 | 中兴通讯股份有限公司 | Method of implementing fast base station switch in broadband wireless system |
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| CN1817007A (en) * | 2002-08-06 | 2006-08-09 | 摩托罗拉公司 | Method and apparatus for effecting a seamless handoff between IP connections |
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