CN1964557A - A data processing method and access equipment during hand-over of mobile station - Google Patents
A data processing method and access equipment during hand-over of mobile station Download PDFInfo
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- CN1964557A CN1964557A CNA2005101159228A CN200510115922A CN1964557A CN 1964557 A CN1964557 A CN 1964557A CN A2005101159228 A CNA2005101159228 A CN A2005101159228A CN 200510115922 A CN200510115922 A CN 200510115922A CN 1964557 A CN1964557 A CN 1964557A
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Abstract
The related data processing method during mobile plant switching in WiMAX system comprises: using one access device entity to store data during switching; after switching, sending all of the buffer data, the stored send-failed data and synchronous data together to target service device. Wherein, the said access device comprises a control module, a data transmitting-receiving module, and two storage modules. This invention can ensure data transmission integrity.
Description
Technical field
The present invention relates to the WiMAX technology, disclose data processing method and access device when travelling carriage switches in a kind of WiMAX system especially.
Background technology
WiMAX (Worldwide Interoperability for Microwave Access, micro-wave access global inter communication) is a kind of emerging wireless communication technology, and it can provide towards the high speed of the Internet and connect.At present, the access level equipment of WiMAX system has two kinds of structural models.
As shown in Figure 1, first kind of framework that the WiMAX system inserts level equipment comprises base station and gateway, pass through the air interface wireless connections between base station and the travelling carriage, between base station and the gateway, be wired connection between gateway and the gateway, gateway is connected to the data, services network, and travelling carriage inserts data network by base station, gateway, and the gateway that directly connects data network is called anchor gateway, the gateway that directly connects the base station is called gateway, and anchor gateway and gateway may overlap.Serving BS and target BS do not have direct data channel, and data and control must be finished by gateway.When travelling carriage switched, current access device was called service equipment, comprised serving BS and gateway, and the equipment of preparing to switch to is called optional equipment, comprises target BS and intended gateway, certainly the scene that also may deposit a base station shifting.
As shown in Figure 2, second kind of framework that the WiMAX system inserts level equipment comprises the base station, is connected by air interface between base station and the travelling carriage, it between the base station wired connection, the base station connects the data service network simultaneously, and data only just can be finished switching in the base station level not by gateway.
Each wireless communication technology all has its specific coverage, and the maximum coverage range of a WiMAX base station is 50 kilometers.In order to expand the application of WiMAX, use a plurality of base stations to arrange webbed structure, with WiMAX system extension to a bigger scope.The user of WiMAX when mobile, when moving to the edge of a base station, use handoff technique to switch to adjacent base station, thereby makes the imperceptible communication interruption of user in system.
In above-mentioned two kinds of frameworks, insert level equipment and comprise physics/media interviews functional module, data channel control function module and switching control function module etc., adopt hard-switching technology in the WiMAX system, be MSS (Mobile Subscriber, travelling carriage) before connecting a new base station, must disconnect and being connected of previous base station, disconnect and reconnect between certainly exist a communication interruption time, at this moment between in send to travelling carriage data might will lose.This interruption for the employed business of user, shows as the decline of communication speed, the losing of voice, and under serious situation, going offline may appear in the user.
Be sent to the data that travelling carriage and travelling carriage be sent to network and be divided into packet one by one, be called as SDU (Service Data Unit, Service Data Unit) at MAC (Media Access Control, media interviews control) layer.Each SDU has a unique sequence number SN (Sequence Number, sequence number), and each SDU is divided into a plurality of again, and each piece all has a piece sequence number, is called BSN (Block SequenceNumber, piece sequence number).
For preventing to cause loss of data because of travelling carriage switches, when prior art switched at travelling carriage, the data that anchor point will be sent to travelling carriage were copied into many parts, adopted the method for two/multicast that two or more target BS are sent simultaneously, and idiographic flow comprises the steps:
1, travelling carriage is at first initiated handoff request to service equipment, in this request, has a tabulation 1, has enumerated the optional equipment that may switch in the table, and it also can be a plurality of that optional equipment can be one.
Target BS is generally detected in the base station around by serving BS and obtains, and the target BS relevant information that mainly comprises in the tabulation 1 has: base station subchannels sequence number, the Carrier interference ratio of representing radio signal quality, received signal intensity, target BS signal and serving BS signal relative delay, round-trip delay and the grade of service etc. in time.
2, service equipment tabulation 1 that travelling carriage is sent is analyzed, determine another one tabulation 2, tabulation 2 must be a subclass of table 1, and tabulation 2 can comprise one or more optional equipments, and service equipment all optional equipments in tabulation 2 is simultaneously initiated handoff request;
According to foundation not explanation in existing standard that 1 pair of base station of tabulation is accepted or rejected, can select to set according to the service object by operator.
3, receive that the optional equipment of request is as agreeing that this travelling carriage switches (switching) and arrives on oneself, to the datapath function module transmission request of log-on data passage in advance of anchor point; If optional equipment is disagreed with travelling carriage and switched to this locality, then return the switching response message of carrying refusal information to serving BS;
4, after anchor point is received register requirement, set up data channel respectively and between the optional equipment of all request registration, and the data that will be sent to travelling carriage duplicate many parts, give target BS by the data channel multicast of setting up simultaneously, and note the sequence number SN1 of first SDU of beginning multicast;
5, anchor point sends data channel to optional equipment respectively and registers response in advance, has SN1 in the message;
6, after optional equipment is received registration response in advance, send switching response message to service equipment, and in message, carry and agree handover information and SN1;
7, service equipment is set up tabulation 3 according to the optional equipment of described answer agreement handover information, comprises the optional equipment information that all agree switching in the tabulation 3, sends switching response message to travelling carriage then, has tabulation 3 in the message;
8, travelling carriage is selected a destination service equipment 3 from tabulating, and by switching indication notice current service equipment, and generally speaking, destination service equipment is selected from the optional equipment of the record 3 of tabulating by travelling carriage;
9, travelling carriage disconnects and the communicating by letter of current service equipment, and beginning is got in touch with the destination service equipment of its selection, the reentering of execution network;
10, set up data channel between current service equipment and the destination service equipment, with not sending SDU and/or sent but do not receive that the SDU of travelling carriage acknowledge message and some SDU receive and dispatch synchronizing information and send to optional equipment before the SN1;
This moment is in destination service equipment, beginning up to up-to-date SDU from SN1 is to obtain from the data channel that links to each other with anchor point, SDU before the SN1 sends from current service equipment, synchronizing information can use destination service equipment to know which SDU has sent to travelling carriage again simultaneously, and which is less than sending;
Perhaps, current service equipment is not with sending SDU and/or sent but do not receive that the SDU of travelling carriage acknowledge message and some SDU receive and dispatch synchronizing information and send to anchor point before the SN1; Send to destination service equipment once more by anchor point.
11, destination service equipment sends to travelling carriage with reduced data;
12, destination service equipment sends the data channel register requirement to anchor point, and anchor point can be according to setting immediately or receiving other order back or after time-delay a period of time after the request of receiving, stops and the data channel between other optional equipments in 3 of tabulating;
13, anchor point responds the data channel register requirement of destination service equipment.
Prior art uses the method for multicast to guarantee all to have the backup of data on each possible optional equipment.In WiMAX, the final right to choose of the optional equipment of switching is travelling carriage.Travelling carriage possesses the ability of autonomous detection optional equipment, therefore under some specific situation, in step 8, the optional equipment of travelling carriage in may not selective listing 3, the multi-case data passage of setting up between the optional equipment of anchor point and the record in 3 of tabulating does not play any effect like this, sets up the SDU of data channel in during this period of time after switch and loses fully from setting up the multi-case data passage before switching.
Summary of the invention
The invention provides data processing method and access device when travelling carriage switches in a kind of WiMAX system, to solve in the existing handoff procedure, when travelling carriage was selected the destination service equipment of final switching from optional equipment, destination service equipment can't obtain the problem of data between transfer period.
Data processing method when travelling carriage switches in a kind of WiMAX system comprises the steps:
A, determine to agree optional equipment that travelling carriage switches and send the data of this travelling carriage, preserve the data in this travelling carriage handoff procedure simultaneously to the optional equipment that described agreement is switched; And
B, the destination service equipment that finally switches to when travelling carriage be non-agreement switch optional equipment the time, the data in this travelling carriage handoff procedure of preserving are sent to described destination service equipment.
Described steps A specifically comprises the steps:
A11, travelling carriage send the handoff request of carrying optional equipment information to current service equipment;
A12, current service equipment send handoff request to all optional equipments or selection part optional equipment;
A13, send register requirement in advance to anchor point when the optional equipment of receiving handoff request agree to switch, otherwise return the refusal handoff response to current service equipment;
A14, anchor point begin to send to the optional equipment of current service equipment and agreement switching simultaneously the data of this travelling carriage, and write down first serial number information of these data that begin to send, then to agreeing that the optional equipment that switches returns the response of registration in advance of carrying this first serial number information;
The optional equipment that A15, agreement are switched returns the agreement handoff response of carrying described first serial number information to current service equipment after receiving the described response of registration in advance;
A16, current service equipment begin to preserve the data that send to travelling carriage according to described first serial number information, according to the agreement handoff response of returning all are agreed that the optional equipment information of switching sends to travelling carriage;
A17, travelling carriage send to current service equipment and carry the switching indication of preparing the destination service facility information that switches to, and send to insert again to described destination service equipment after being connected of disconnection and current service equipment and ask.
Described step B specifically comprises the steps:
B11, destination service equipment send the data channel register requirement of carrying mobile station information according to the request that inserts again of travelling carriage to anchor point;
When B12, anchor point were confirmed this travelling carriage to be in switching state and described destination service equipment be non-optional equipment, beginning sent the data of travelling carriage and writes down this second serial number information of data when beginning to send to destination service equipment;
B13, anchor point are carried at described second serial number information in the data channel cancellation request and send to current service equipment;
B14, current service equipment stop to preserve the data of travelling carriage and all data and data synchronization information that successfully do not send before described second serial number information are sent to destination service equipment, and to anchor point return data passage cancellation response;
B15, anchor point be to the response of destination service equipment return data channel registration, receiving other order back or after time-delay a period of time even exist side by side, and stops to send to current service equipment and optional equipment the data of this travelling carriage;
B16, destination service equipment begin to send data according to described synchronizing information to travelling carriage after receiving data channel registration response.
Also comprise the steps: among the described step B
B01, current service equipment judge that according to the destination service facility information whether this destination service equipment be described optional equipment or one of them, if execution in step B11 ' then; Otherwise current service equipment continues to receive and preserve mobile station data, waits for execution in step B14 simultaneously;
B11 ', current service equipment stop to preserve the data of this travelling carriage and send switch acknowledgment message to destination service equipment, with the data and the data synchronization information of success transmission do not send to destination service equipment before described first serial number information;
B12 ', destination service begin according to described synchronizing information to travelling carriage transmission data and to anchor point sendaisle register requirement;
B13 ', anchor point are being received other order back or after time-delay a period of time, are being stopped to send to current service equipment and other optional equipments the data of this travelling carriage even exist side by side to the response of destination service equipment return data channel registration.
Described steps A specifically comprises the steps:
A21, travelling carriage send the handoff request of carrying optional equipment information to current service equipment;
A22, current service equipment send handoff request to all optional equipments or selection part optional equipment;
A23, send register requirement in advance to anchor point when the optional equipment of receiving handoff request agree to switch, otherwise return the refusal handoff response to service equipment;
A24, anchor point begin simultaneously to the optional equipment transmission of current service equipment and agreement switching and the data of preserving this travelling carriage, and first serial number information of the data of recording start transmission, then to agreeing that the optional equipment that switches returns the response of registration in advance of carrying this first serial number information;
The optional equipment that A25, agreement are switched returns the agreement handoff response of carrying described first serial number information to current service equipment after receiving the described response of registration in advance;
A26, current service equipment agree that with all the optional equipment information of switching sends to travelling carriage according to the agreement handoff response of returning;
A27, travelling carriage send to current service equipment and carry the switching indication of preparing the destination service equipment that switches to, and send to insert again to described destination service equipment after being connected of disconnection and current service equipment and ask.
Described step B specifically comprises the steps:
B21, destination service equipment send the data channel register requirement of carrying mobile station information according to the request that inserts again of travelling carriage to anchor point;
B22, anchor point confirm that this travelling carriage is in switching state and described destination service equipment is non-optional equipment, then stop to preserve the data of this travelling carriage, and begin the data of travelling carriage are sent to destination service equipment simultaneously, and recording start sends to second serial number information of the data of destination service equipment;
B23, anchor point are to current service equipment sending data passage cancellation request;
B24, current service equipment send to anchor point with all data and data synchronization information that successfully do not send before described first serial number information, and to anchor point return data passage cancellation response;
B25, all data and the synchronizing information of anchor point before destination service equipment sends described second serial number information, and to destination service equipment return data channel registration response, then immediately or receiving other order back or after time-delay a period of time, stopping to send the data of this travelling carriage to service equipment and optional equipment;
B26, destination service equipment receive data and the synchronizing information that anchor point sends, and begin to send data according to described synchronizing information to travelling carriage after receiving data channel registration response.
Also comprise the steps: among the described step B
B02, current service equipment judge that according to the destination service facility information whether this destination service equipment be described optional equipment or one of them, if execution in step B21 ' then; Otherwise current service equipment is waited for execution in step B24;
B21 ', current service equipment send switch acknowledgment message and not successful data and the data synchronization information that sends before destination service equipment sends described first serial number information;
B22 ', destination service equipment begin according to described synchronizing information to travelling carriage transmission data and to anchor point sendaisle register requirement;
B23 ', anchor point stop to preserve data and to the response of destination service equipment return data channel registration, are receiving other order back or after time-delay a period of time, stopping to send to current service equipment and other optional equipments the data of this travelling carriage even exist side by side.
Described data are split into Service Data Unit SDU and send, and described serial number information is meant the sequence number of corresponding SDU.
A kind of WiMAX system access device comprises travelling carriage switching controls module and the data transmit-receive module that is connected described switching controls module, and described access device also comprises: first data memory module that connects described data transmit-receive module;
Described switching controls module indicates described data transmit-receive module that the serial number information of the data in the travelling carriage handoff procedure and these data is saved in described first data memory module according to the dependent instruction in the travelling carriage handoff procedure, and perhaps the data of obtaining in the travelling carriage handoff procedure according to described serial number information from described first data memory module also send.
Described access device also comprises:
Connect the signaling receiving and transmission module of described switching controls module, be used to receive and dispatch described dependent instruction;
The data channel that connects described data transmit-receive module is set up module, is used to set up the passage of transceive data;
Second data memory module that connects data transmit-receive module, the data and the data transmit-receive synchronizing information that send of success before being used for storing mobile station and switching, described switching controls module are switched at travelling carriage and are finished the back described data transmit-receive module of indication obtain data and data transmit-receive synchronizing information and the transmission that described success sends from described second data memory module.
Described access device is meant base station and/or IAD.
Beneficial effect of the present invention is as follows:
The SDU of technical solution of the present invention by transmitting in the buffer memory handoff procedure on current service equipment or anchor point, guaranteed that travelling carriage receives the integrality of data, and, when adopting the data of on anchor point, preserving in the handoff procedure, to also there be the SDU that successfully sends to be transmitted to anchor point by current service equipment by the data channel of having set up, send to optional equipment by the anchor point unification, avoid and optional equipment between set up the process of data channel once more, saved system resource to a certain extent.
Description of drawings
Fig. 1 is existing WiMAX system access network model one;
Fig. 2 is existing WiMAX system access network model two;
When Fig. 3 switches for existing travelling carriage, use multicasting method to prevent the flow chart of loss of data;
Fig. 4 is embodiment one flow chart of the method for the invention, and wherein metadata cache is on current service equipment;
Fig. 5 is embodiment two flow charts of the method for the invention, and wherein metadata cache is on anchor point;
Fig. 6 is the structural representation of access device of the present invention.
Embodiment
The method of the invention is applicable to two kinds of frameworks illustrated in figures 1 and 2, and current service equipment, optional equipment or anchor point can be the base stations, also can be the combination of base station and gateway; Data channel can be the passage between the base station, also can be the passage between base station and the gateway, can also be the passage between gateway and the gateway.
The present invention adds the method for buffer memory on the basis of existing technology, promptly can guarantee data sync transmission under normal circumstances, can prevent the integrality of the reception data of travelling carriage when unconventional situation again.
The technical conceive of the method for the invention is: when travelling carriage between transfer period, one of them functional entity is responsible for the data of multicast between transfer period are preserved, after switching is finished, the data of success transmission and synchrodata are sent to the destination service equipment that the travelling carriage preparation switches to before in the multicast that these data in buffer are preserved with current service equipment, be not recorded in the target BS of tabulation in 3 even mobile station in selecting occurred, also can utilize data in buffer to guarantee the integrality of transfer of data.
In the specific implementation, because current service equipment and anchor point can both be determined the actual destination service equipment that switches to of travelling carriage whether in candidate list 3, the foundation of judgement is respectively:
1, current service equipment: travelling carriage can send a switch indicating information to current service equipment before switching, in this message, travelling carriage can indicate its destination service equipment that finally switches to, current service equipment can compare this destination service equipment and own tabulation, thereby determines that the destination service equipment that finally switches to is whether in optional equipment is tabulated;
2, anchor point: after switching, destination service equipment can be initiated the request set up data channel to anchor point, and before switching, anchor point has all been set up multicast channel with the optional equipment in candidate list, therefore anchor point can be compared the destination service equipment that reality is switched with candidate's optional equipment, thereby can determine that the realistic objective service equipment is whether in candidate list.
Therefore, data cached functional entity can be arranged on the current service equipment, also can be arranged in the anchor point, below with specific embodiment and be described with reference to the accompanying drawings.
Embodiment one, metadata cache are carried out by current service equipment
As shown in Figure 4, specifically comprise the steps:
S101, travelling carriage are at first initiated handoff request to current service equipment, in this request, have a tabulation 1, have enumerated candidate's optional equipment that may switch in the table, and it also can be a plurality of that candidate's optional equipment can be one;
The tabulation 1 that S102, current service equipment are sent travelling carriage is analyzed, determine another one tabulation 2, tabulation 2 must be a subclass of table 1, tabulation 2 can comprise one or more optional equipments, and the current service equipment one or more optional equipments in tabulation 2 is simultaneously initiated handoff request;
If S103, the optional equipment of receiving request agree this travelling carriage switch to own on, send the request of log-on data passage in advance to the datapath function module of anchor point;
If optional equipment is disagreed with travelling carriage and switched to this locality, then return the switching response message of carrying refusal information to serving BS;
S104, after anchor point is received register requirement, set up data channel in advance respectively and between all optional equipments of agreeing to switch, the data that are sent to this travelling carriage of current service equipment are duplicated many parts, give the target BS of agreeing switching by the data channel multicast of setting up in advance simultaneously, and note the sequence number SN1 of first SDU of beginning multicast;
S105, anchor point send data channel to the optional equipment of agreeing to switch and shift to an earlier date registration reply message, have the sequence number SN1 of first SDU in this response message;
S106, optional equipment send switching response message to current service equipment and agree the affirmative acknowledgement of switching, and carry SN1 in message;
After S107, current service equipment are received the affirmative acknowledgement of agreeing to switch, obtain SN1 and be that the SDU of SN1 begins to carry out buffer memory from sequence number, because current service equipment is responsible for and the communicating by letter of travelling carriage, therefore SN1 before and SDU that do not send to travelling carriage as yet and/or send after be not moved the true receipts of platform SDU also be kept in the current service equipment;
S108, current service equipment are set up tabulation 3 according to replying the optional equipment of agreeing handover information, comprise the optional equipment information that all agree switching in the tabulation 3, current service equipment sends switching response message to travelling carriage then, carries tabulation 3 in this switching response message;
After S109, mobile device are received the switching response message of carrying tabulation 3, may select a destination service equipment from tabulating 3, also may determine a destination service equipment according to the autonomous result who detects, and send switch indicating information to current service equipment and carry out switching notice, carry the information of the destination service equipment of choosing in this switch indicating information;
S110, then, travelling carriage disconnect and the communicating by letter of current service equipment, and the destination service equipment that beginning is chosen with it is got in touch, the reentering of execution network;
The switching indication that S111, current service equipment send according to travelling carriage is judged the actual destination service equipment that switches whether in candidate list 3, and if not then going to step S116, otherwise current service equipment stops buffer memory and continues step S112;
S112, current service equipment send switch acknowledgment message to the destination service equipment of choosing, then and set up data channel between the destination service equipment of choosing and SDU before the SN1 that preserves and the information that some are synchronous are sent to the destination service equipment of choosing; This moment, the destination service equipment chosen continued to receive SDU behind the SN1 simultaneously by the data channel of directly setting up in advance with anchor point;
In the destination service equipment, beginning up to up-to-date SDU from SN1 is to obtain from the data channel that links to each other with anchor point, be not moved the true SDU that receives of platform after SDU that does not send to travelling carriage as yet before the SN1 and/or the transmission and send from current service equipment, destination service equipment can know how to begin to send SDU according to synchronizing information simultaneously;
S113, destination service equipment will be put back SDU in order and begin to send to travelling carriage according to synchronizing information after travelling carriage is finished access;
S114, destination service equipment send the data channel register requirement to anchor point, anchor point is after receiving the data channel register requirement, data channel between reservation and this destination service equipment and the lasting data that send travelling carriage, immediately or receiving other order back or the multi-case data passage of other optional equipment in 3 of after time-delay a period of time, stopping to tabulate simultaneously according to predefined flow process, other optional equipment abandons the SN1 SDU afterwards that receives after data channel is stopped;
S115, anchor point respond the data channel register requirement of destination service equipment;
After travelling carriage is chosen destination service equipment from tabulating 3, switching flow so far finishes, travelling carriage is by the equipment receiving data bag after switching, said process has guaranteed the integrality of data in the normal handoff procedure, if travelling carriage is not chosen destination service equipment from tabulating 3, but selected autonomous detected destination service equipment, the present invention guarantees the integrality of data as follows:
After S116, destination service equipment are received the handoff request of travelling carriage, send the data channel login request message, carry the identification information of travelling carriage in this request message to anchor point;
When S117, anchor point are received login request message at every turn, can judge according to the identification information of travelling carriage whether current this travelling carriage is in the switching flow, and judge that according to the candidate list 3 of correspondence these destination service equipment are the autonomous detected equipment of travelling carriage, anchor point is set up a new data channel at this destination service equipment, and begin current data also is multicasted on this data channel, first SDU sequence number of recording start is SNm;
S118, then, anchor point has sequence number SNm to current service device initializes data passage cancel request message in this message;
S119, current service equipment stop the SDU that buffer memory is received after receiving the data channel cancel request message;
Set up data channel between S120, current service equipment and the destination service equipment, and the local sequence number of preserving of transmission is SNm all SDU and a relevant synchronizing information before;
The local SDU that preserves comprise the SDU that does not send to travelling carriage as yet before the SN1 and/or send after be not moved the SDU that platform is really received, and the sequence number of buffer memory all SDU of after SN1, (comprising SN1) before SNm;
S121, current service equipment send data channel cancellation response message to anchor point;
S122, anchor point respond to destination service equipment sending data channel registration;
S123, destination service equipment begin to send the SDU that receives to travelling carriage according to synchronizing information;
In the present embodiment, by the SDU that transmits in the buffer memory handoff procedure on current service equipment, guaranteed that travelling carriage receives the integrality of data, and, owing to preserved the data in the handoff procedure on the current service equipment, therefore adopt and set up data channel between current service equipment and the destination service equipment and directly transmit and in time do not send to the data cached of travelling carriage.
Embodiment two, metadata cache are carried out by anchor point
As shown in Figure 5, specifically comprise the steps:
S201, travelling carriage are at first initiated handoff request to current service equipment, in this request, have a tabulation 1, have enumerated candidate's optional equipment that may switch in the table, and it also can be a plurality of that candidate's optional equipment can be one;
The tabulation 1 that S202, current service equipment are sent travelling carriage is analyzed, determine another one tabulation 2, tabulation 2 must be a subclass of table 1, tabulation 2 can comprise one or more optional equipments, and the current service equipment one or more optional equipments in tabulation 2 is simultaneously initiated handoff request;
If S203, the optional equipment of receiving request agree this travelling carriage switch to own on, send the request of log-on data passage in advance to the datapath function module of anchor point;
If optional equipment is disagreed with travelling carriage and switched to this locality, then return the switching response message of carrying refusal information to serving BS;
S204, after anchor point is received register requirement, set up data channel in advance respectively and between all optional equipments of agreeing to switch, the data that are sent to this travelling carriage of current service equipment are duplicated many parts, give the target BS of agreeing switching by the data channel multicast of setting up in advance simultaneously, and note the sequence number SN1 of first SDU of beginning multicast;
S205, anchor point begin the data of multicast are carried out buffer memory, and the sequence number of first SDU of record buffer memory is SN1;
S206, anchor point send data channel to the optional equipment of agreeing to switch and shift to an earlier date registration reply message, have the sequence number SN1 of first SDU in this response message;
After S207, current service equipment are received the affirmative acknowledgement of agreeing to switch, obtain SN1, because current service equipment is responsible for and the communicating by letter of travelling carriage, therefore the SDU that does not send to travelling carriage as yet SN1 before and/or send after be not moved the true receipts of platform SDU be kept in the current service equipment; Current service equipment continues to send SN1 data before, and writes down synchronous state;
S208, current service equipment are set up tabulation 3 according to replying the optional equipment of agreeing handover information, comprise the optional equipment information that all agree switching in the tabulation 3, current service equipment sends switching response message to travelling carriage then, carries tabulation 3 in this switching response message;
After S209, mobile device are received the switching response message of carrying tabulation 3, may select a destination service equipment from tabulating 3, also may determine a destination service equipment according to the autonomous result who detects, and current service equipment sends switch indicating information and carries out switching notice, carries the information of the destination service equipment of choosing in this switch indicating information;
S210, then, travelling carriage disconnect and the communicating by letter of current service equipment, and beginning is got in touch with the destination service equipment of its selection, the reentering of execution network;
The switching indication that S211, current service equipment send according to travelling carriage is judged the actual destination service equipment that switches whether in candidate list 3, and if not then going to step S216, otherwise current service equipment sends switch acknowledgment message to destination service equipment;
Current service equipment is not moved true SDU that receives of platform and the information that some are synchronous with the sequence number of preserving and sends to destination service equipment at the SDU that does not send to travelling carriage before the SN1 as yet and/or after sending, destination service equipment is also receiving the SDU of sequence number after SN1 that anchor point sends simultaneously;
Then in destination service equipment, beginning up to up-to-date SDU from SN1 is to obtain from the data channel that links to each other with anchor point, and the SDU before the SN1 sends from current service equipment, can know how to begin to send SDU according to synchronizing information simultaneously;
S212, the destination service equipment chosen will be put back SDU in order and begin to send to travelling carriage according to synchronizing information after travelling carriage is finished access;
S213, destination service equipment send the data channel register requirement to anchor point, anchor point is after receiving the data channel register requirement, according to predefined flow process immediately or receiving other order back or the multi-case data passage of other optional equipment in 3 of after time-delay a period of time, stopping to tabulate, other optional equipment abandons the SN1 SDU afterwards that receives after data channel is stopped;
S214, anchor point are judged destination service equipment in candidate list 3 according to tabulation 3, and have set up data channel, then stop buffer memory;
S215, anchor point respond the data channel register requirement of destination service equipment;
After travelling carriage is chosen destination service equipment from tabulating 3, switching flow so far finishes, travelling carriage is by the equipment receiving data bag after switching, said process has guaranteed the integrality of data in the normal handoff procedure, if travelling carriage is not chosen destination service equipment from tabulating 3, but selected autonomous detected destination service equipment, the present invention guarantees the integrality of data as follows:
S216, destination service equipment re-access the anchor point information that obtains in the flow process and initiate the data channel register requirement to anchor point according to travelling carriage;
When S217, anchor point are received login request message at every turn, can judge according to the identification information of travelling carriage whether current this travelling carriage is in the switching flow, and judge that according to the candidate list 3 of correspondence these destination service equipment are the autonomous detected equipment of travelling carriage, anchor point is set up a new data channel at this optional equipment, and begin current data also is multicasted on this data channel simultaneously, first SDU sequence number of recording start is SNm;
S218, anchor point stop the buffer memory of this mobile station data;
S219, anchor point are to current service equipment sending data passage cancel request message;
S220, since SN1 before data anchor point do not cushion, if therefore also preserve on the current service equipment and be not moved the SDU that platform is really received to the SDU that does not send to travelling carriage as yet and/or after sending, then these SDU and synchronizing information are sent to anchor point, if there is no do not send or unacknowledged data before the SN1, then do not send data, if and first SDU sequence number that does not send to travelling carriage as yet is greater than SN1, then the current service device just will mark this sequence number and gets final product in synchronizing information;
S221, current service equipment send data channel cancellation response message to anchor point;
S222, anchor point begin to send to destination service equipment after the synchronizing information arrangement of the data received with data in buffer, from current service equipment and current service equipment;
S223, anchor point are to destination service equipment sending data channel registration response message;
S224, destination service equipment begin to send data SDU according to synchronizing information to travelling carriage;
In the present embodiment, by the SDU that transmits in the buffer memory handoff procedure on anchor point, guaranteed that travelling carriage receives the integrality of data, and, owing to preserved the data in the handoff procedure on the anchor point, therefore current service equipment is transmitted to anchor point with remaining SDU, avoid and destination service equipment between set up the process of data channel once more, save certain system resource.
For realizing the method for the invention, the present invention also provides a kind of WiMAX system access device, this access device comprises travelling carriage switching controls module and the data transmit-receive module that is connected described switching controls module, and first data memory module that connects data transmit-receive module;
When the switching controls module judges that according to the dependent instruction in the travelling carriage handoff procedure travelling carriage begins to switch, the designation data transceiver module is input to the serial number information of the data in the travelling carriage handoff procedure and these data in first data memory module and preserves, and when travelling carriage is selected the destination service equipment of final switching from optional equipment, the designation data transceiver module obtains the data in the travelling carriage handoff procedure and sends to destination service equipment according to described serial number information from first data memory module again, or sends to destination service equipment by anchor point;
Access device also comprises:
Connect the signaling receiving and transmission module of switching controls module, be used to receive and dispatch dependent instruction;
The data channel that connects data transmit-receive module is set up module, is used to set up the passage of transceive data;
Second data memory module that connects data transmit-receive module, the data and the data transmit-receive synchronizing information that send of success before being used for storing mobile station and switching, the switching controls module travelling carriage switch finish back designation data transceiver module from described second data memory module, to obtain switching before the success transmission data and data transmit-receive synchronizing information and send to destination service equipment, or send to destination service equipment by anchor point;
According to the method for the invention, access device is base station or IAD, perhaps is that base station and IAD merge the functional entity that is provided with.
Obviously, those skilled in the art can carry out various changes and modification to the present invention and not break away from the spirit and scope of the present invention.Like this, if of the present invention these are revised and modification belongs within the scope of claim of the present invention and equivalent technologies thereof, then the present invention also is intended to comprise these changes and modification interior.
Claims (11)
- Data processing method when 1, travelling carriage switches in a kind of WiMAX system is characterized in that, comprises the steps:A, determine to agree optional equipment that travelling carriage switches and send the data of this travelling carriage, preserve the data in this travelling carriage handoff procedure simultaneously to the optional equipment that described agreement is switched; AndB, the destination service equipment that finally switches to when travelling carriage be non-agreement switch optional equipment the time, the data in this travelling carriage handoff procedure of preserving are sent to described destination service equipment.
- 2, the method for claim 1 is characterized in that, described steps A specifically comprises the steps:A11, travelling carriage send the handoff request of carrying optional equipment information to current service equipment;A12, current service equipment send handoff request to all optional equipments or selection part optional equipment;A13, send register requirement in advance to anchor point when the optional equipment of receiving handoff request agree to switch, otherwise return the refusal handoff response to current service equipment;A14, anchor point begin to send to the optional equipment of current service equipment and agreement switching simultaneously the data of this travelling carriage, and write down first serial number information of these data that begin to send, then to agreeing that the optional equipment that switches returns the response of registration in advance of carrying this first serial number information;The optional equipment that A15, agreement are switched returns the agreement handoff response of carrying described first serial number information to current service equipment after receiving the described response of registration in advance;A16, current service equipment begin to preserve the data that send to travelling carriage according to described first serial number information, according to the agreement handoff response of returning all are agreed that the optional equipment information of switching sends to travelling carriage;A17, travelling carriage send to current service equipment and carry the switching indication of preparing the destination service facility information that switches to, and send to insert again to described destination service equipment after being connected of disconnection and current service equipment and ask.
- 3, method as claimed in claim 2 is characterized in that, described step B specifically comprises the steps:B11, destination service equipment send the data channel register requirement of carrying mobile station information according to the request that inserts again of travelling carriage to anchor point;When B12, anchor point were confirmed this travelling carriage to be in switching state and described destination service equipment be non-optional equipment, beginning sent the data of travelling carriage and writes down this second serial number information of data when beginning to send to destination service equipment;B13, anchor point are carried at described second serial number information in the data channel cancellation request and send to current service equipment;B14, current service equipment stop to preserve the data of travelling carriage and all data and data synchronization information that successfully do not send before described second serial number information are sent to destination service equipment, and to anchor point return data passage cancellation response;B15, anchor point be to the response of destination service equipment return data channel registration, receiving other order back or after time-delay a period of time even exist side by side, and stops to send to current service equipment and optional equipment the data of this travelling carriage;B16, destination service equipment begin to send data according to described synchronizing information to travelling carriage after receiving data channel registration response.
- 4, method as claimed in claim 3 is characterized in that, also comprises the steps: among the described step BB01, current service equipment judge that according to the destination service facility information whether this destination service equipment be described optional equipment or one of them, if execution in step B11 ' then; Otherwise current service equipment continues to receive and preserve mobile station data, waits for execution in step B14 simultaneously;B11 ', current service equipment stop to preserve the data of this travelling carriage and send switch acknowledgment message to destination service equipment, with the data and the data synchronization information of success transmission do not send to destination service equipment before described first serial number information;B12 ', destination service begin according to described synchronizing information to travelling carriage transmission data and to anchor point sendaisle register requirement;B13 ', anchor point are being received other order back or after time-delay a period of time, are being stopped to send to current service equipment and other optional equipments the data of this travelling carriage even exist side by side to the response of destination service equipment return data channel registration.
- 5, the method for claim 1 is characterized in that, described steps A specifically comprises the steps:A21, travelling carriage send the handoff request of carrying optional equipment information to current service equipment;A22, current service equipment send handoff request to all optional equipments or selection part optional equipment;A23, send register requirement in advance to anchor point when the optional equipment of receiving handoff request agree to switch, otherwise return the refusal handoff response to service equipment;A24, anchor point begin simultaneously to the optional equipment transmission of current service equipment and agreement switching and the data of preserving this travelling carriage, and first serial number information of the data of recording start transmission, then to agreeing that the optional equipment that switches returns the response of registration in advance of carrying this first serial number information;The optional equipment that A25, agreement are switched returns the agreement handoff response of carrying described first serial number information to current service equipment after receiving the described response of registration in advance;A26, current service equipment agree that with all the optional equipment information of switching sends to travelling carriage according to the agreement handoff response of returning;A27, travelling carriage send to current service equipment and carry the switching indication of preparing the destination service equipment that switches to, and send to insert again to described destination service equipment after being connected of disconnection and current service equipment and ask.
- 6, method as claimed in claim 5 is characterized in that, described step B specifically comprises the steps:B21, destination service equipment send the data channel register requirement of carrying mobile station information according to the request that inserts again of travelling carriage to anchor point;B22, anchor point confirm that this travelling carriage is in switching state and described destination service equipment is non-optional equipment, then stop to preserve the data of this travelling carriage, and begin the data of travelling carriage are sent to destination service equipment simultaneously, and recording start sends to second serial number information of the data of destination service equipment;B23, anchor point are to current service equipment sending data passage cancellation request;B24, current service equipment send to anchor point with all data and data synchronization information that successfully do not send before described first serial number information, and to anchor point return data passage cancellation response;B25, all data and the synchronizing information of anchor point before destination service equipment sends described second serial number information, and to destination service equipment return data channel registration response, then immediately or receiving other order back or after time-delay a period of time, stopping to send the data of this travelling carriage to service equipment and optional equipment;B26, destination service equipment receive data and the synchronizing information that anchor point sends, and begin to send data according to described synchronizing information to travelling carriage after receiving data channel registration response.
- 7, method as claimed in claim 6 is characterized in that, also comprises the steps: among the described step BB02, current service equipment judge that according to the destination service facility information whether this destination service equipment be described optional equipment or one of them, if execution in step B21 ' then; Otherwise current service equipment is waited for execution in step B24;B21 ', current service equipment send switch acknowledgment message and not successful data and the data synchronization information that sends before destination service equipment sends described first serial number information;B22 ', destination service equipment begin according to described synchronizing information to travelling carriage transmission data and to anchor point sendaisle register requirement;B23 ', anchor point stop to preserve data and to the response of destination service equipment return data channel registration, are receiving other order back or after time-delay a period of time, stopping to send to current service equipment and other optional equipments the data of this travelling carriage even exist side by side.
- As claim 5 or 7 described methods, it is characterized in that 8, described data are split into Service Data Unit SDU and send, described serial number information is meant the sequence number of corresponding SDU.
- 9, a kind of WiMAX system access device comprises travelling carriage switching controls module and the data transmit-receive module that is connected described switching controls module, it is characterized in that described access device also comprises: first data memory module that connects described data transmit-receive module;Described switching controls module indicates described data transmit-receive module that the serial number information of the data in the travelling carriage handoff procedure and these data is saved in described first data memory module according to the dependent instruction in the travelling carriage handoff procedure, and perhaps the data of obtaining in the travelling carriage handoff procedure according to described serial number information from described first data memory module also send.
- 10, access device as claimed in claim 9 is characterized in that, described access device also comprises:Connect the signaling receiving and transmission module of described switching controls module, be used to receive and dispatch described dependent instruction;The data channel that connects described data transmit-receive module is set up module, is used to set up the passage of transceive data;Second data memory module that connects data transmit-receive module, the data and the data transmit-receive synchronizing information that send of success before being used for storing mobile station and switching, described switching controls module are switched at travelling carriage and are finished the back described data transmit-receive module of indication obtain data and data transmit-receive synchronizing information and the transmission that described success sends from described second data memory module.
- 11, as claim 9 or 10 described travelling carriage access devices, it is characterized in that described access device is meant base station and/or IAD.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2005101159228A CN1964557A (en) | 2005-11-11 | 2005-11-11 | A data processing method and access equipment during hand-over of mobile station |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2005101159228A CN1964557A (en) | 2005-11-11 | 2005-11-11 | A data processing method and access equipment during hand-over of mobile station |
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| CN1964557A true CN1964557A (en) | 2007-05-16 |
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| CNA2005101159228A Pending CN1964557A (en) | 2005-11-11 | 2005-11-11 | A data processing method and access equipment during hand-over of mobile station |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2009049553A1 (en) * | 2007-10-16 | 2009-04-23 | Huawei Technologies Co., Ltd. | A method, system and apparatus for handover processing |
| CN101572922B (en) * | 2008-04-28 | 2011-04-13 | 大唐移动通信设备有限公司 | Method and equipment for processing user plane in switching process |
| CN101453765B (en) * | 2007-12-04 | 2012-07-04 | 华为技术有限公司 | Method, system and apparatus for network handoff |
| CN110769471A (en) * | 2018-07-25 | 2020-02-07 | 成都鼎桥通信技术有限公司 | Switching and device of broadband trunking communication network and public network |
| CN114258091A (en) * | 2020-09-23 | 2022-03-29 | 上海诺基亚贝尔股份有限公司 | Data lossless handover |
| CN116419360A (en) * | 2023-06-06 | 2023-07-11 | 成都爱瑞无线科技有限公司 | Mobility management method, device and storage medium of general sense integrated system |
-
2005
- 2005-11-11 CN CNA2005101159228A patent/CN1964557A/en active Pending
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2009049553A1 (en) * | 2007-10-16 | 2009-04-23 | Huawei Technologies Co., Ltd. | A method, system and apparatus for handover processing |
| CN101415211B (en) * | 2007-10-16 | 2012-10-03 | 华为技术有限公司 | Method, system and apparatus for processing switch |
| CN101453765B (en) * | 2007-12-04 | 2012-07-04 | 华为技术有限公司 | Method, system and apparatus for network handoff |
| CN101572922B (en) * | 2008-04-28 | 2011-04-13 | 大唐移动通信设备有限公司 | Method and equipment for processing user plane in switching process |
| CN110769471A (en) * | 2018-07-25 | 2020-02-07 | 成都鼎桥通信技术有限公司 | Switching and device of broadband trunking communication network and public network |
| CN114258091A (en) * | 2020-09-23 | 2022-03-29 | 上海诺基亚贝尔股份有限公司 | Data lossless handover |
| CN116419360A (en) * | 2023-06-06 | 2023-07-11 | 成都爱瑞无线科技有限公司 | Mobility management method, device and storage medium of general sense integrated system |
| CN116419360B (en) * | 2023-06-06 | 2023-09-19 | 成都爱瑞无线科技有限公司 | Mobility management method, device and storage medium of general sense integrated system |
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