CN1933661A

CN1933661A - Method for realizing active state inter-AN switching in network

Info

Publication number: CN1933661A
Application number: CNA2006100568458A
Authority: CN
Inventors: 高全中
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2005-07-18
Filing date: 2006-03-07
Publication date: 2007-03-21
Anticipated expiration: 2026-03-07
Also published as: CN100461960C

Abstract

A method for realizing switch-over between multiple active state AN in network includes confirming that switch-over operation is required to be carried out between multiple active state access network AN and starting up switching-over course, setting up connection of destination packet control function PCF side to packet data service network PDSN then sending data message carried with double cast indicating information simultaneously to both source PCF side and destination PCF side by PDSN and buffer-storing received data separately by both sides.

Description

The method of switching between realization activated state AN in the network

Technical field

The present invention relates to network communications technology field, relate in particular to the method for switching between realization activated state AN in a kind of network.

Background technology

Along with development of Communication Technique, in order to solve the bottleneck problem on the air interface in the cdma system, 3GPP2 (International Standards Organization of 3G (Third Generation) Moblie) has issued the standard of HRPD (HRPD-HighRate Packet Data, HRPD (high rate packet data)) network technology.Its main purpose is to improve the message transmission rate of wave point, and with respect to the 153.6kbit/s of cdma20001x, the HRPD technology can provide forward data rate up to 2.4Mbit/s.

In the HRPD network, HRPD has aloft adopted new modulation technique and has increased methods such as data rate control, optimizing scheduling and time division multiplexing on the interface, makes that the message transmission rate on the air interface is greatly improved.The HRPD technology can go up at a CDMA carrier frequency (1.25MHz) and adopt special-purpose data channel to support high-speed packet data service, and the forward direction peak data rate can reach 2.4576Mbit/s, oppositely supports unique user peak data rate 153.6kbit/s.

When carrying out the HRPD network design, need independently carrier frequency support HRPD.This just makes when user terminal is mobile in the HRPD network, may be moved under another AN by an AN in the HRPD network, at this moment, need carry out by source AN to the hand-off process target AN.

At present, in the 3GPP2 standard, only support the switching of Dormant (dormancy) attitude between the AN (Access Network), corresponding handoff procedure is specially: carry out data service when terminal in HRPD (HRPD (high rate packet data)) network and move to the sub-district when covering the edge zone, need switch to another AN and carry on data service, this moment, system switched to Dormant attitude with Packet data service by activated state at source AN, switched to target AN in the Dormant attitude then; After entering into target AN, system switches to activated state with Packet data service by the Dormant attitude again at target AN.

Switching mode between above-mentioned AN can realize the handover operation to target AN by source AN.But, require than higher data service for real-time, as VoIP (IP-based voice), Video Phone (video telephone), PTT (button is promptly logical), Streaming Media etc., cause service disconnection in the above-mentioned handoff process probably if adopt, have a strong impact on the use of user business.

That is to say that the implementation method of dormant state switching between the AN that present standard provides, between PCF in handoff procedure, needs to discharge the PPP (point-to-point protocol) that is using and connects, PDSN need be the new PPP connection of purpose network allocation.In redistributing the PPP connection procedure, on the one hand, newly assigned PPP connects and may make customer service interrupt because reasons such as problem of resource cause the assigning process failure; On the other hand, need the regular hour, therefore, also will cause bigger time delay influence the current business of user because PDSN rebulids a PPP connection.

For this reason, need provide and to guarantee between AN, can guarantee in the handoff procedure professional unbroken direct-cut operation processing procedure.Yet, only realized at present hand-off process flow process between the AN of above-mentioned dormant state in the standard, and the flow process of activated state direct-cut operation between the also undefined HRPD AN of system, between PCF.

Summary of the invention

In view of above-mentioned existing in prior technology problem, the purpose of this invention is to provide the method for switching between realization activated state AN in a kind of network, with reliability of data transmission in effective raising handoff procedure.

The objective of the invention is to be achieved through the following technical solutions:

The invention provides the method for switching between realization activated state AN in a kind of network, comprising:

A, determine to need to carry out handover operation between the activated state Access Network AN, and start handoff procedure;

B, in handoff procedure, set up being connected between purpose Packet Control Function PCF side and the packet data service network PDSN;

C, described PDSN send to source PCF side and purpose PCF side simultaneously and carry two data messages of broadcasting indication information, and both sides respectively buffer memory receive carry two data of broadcasting indication information.

Among the present invention, when switching between the AN that belongs to different PCF, described step B comprises:

After target AN receives the handoff request message that source AN sends, send the request of connecting to purpose PCF, and set up being connected between target AN and purpose PCF, simultaneously, purpose PCF also needs to packet data service network PDSN registration, sets up being connected between PCF and PDSN.

Described step C also comprises:

The switching response message that C1, source AN send according to target AN is to terminal transmitting channel assignment message.

Among the present invention, carry out described step C1 and also comprise before:

C0, source AN determine to the time of terminal transmitting channel assignment message according to the channel conditions and traffic attribute of terminal, and the time execution in step C1 that is determining.

Described step C0 comprises:

If the time delay sensitive traffic is arranged in the business that terminal is carried out, and do not surpass the time delay that allows, execution in step C1 immediately then, if there is not the delay sensitive business in the business that terminal is carried out, and channel quality meets predetermined condition always, after then source AN sends that not carrying of buffer memory is two and broadcasts the data of indication information, execution in step C1; If the situation of predetermined condition appears not meeting in channel quality, then direct execution in step C1.

Described step C also comprises:

After connecting between terminal and the target AN, the delay sensitive that target AN will be not overtime is professional to send to terminal with all non-delay sensitive business datums.

Described step C also comprises:

Between terminal and target AN, connect, and source AN with the reverse data of buffer memory send finish after, being connected between source of release AN and the PDSN then; Simultaneously, target AN receive channel that terminal sends set up finish message after, the radio link protocol RLP information that resets, and begin immediately to send the business data packet of not overtime delay sensitive and the business data packet of all non-delay sensitive to terminal.

Method of the present invention also comprises:

The reverse data that PDSN reception sources AN and target AN send, and sort according to the situation of self buffer memory and type of service and to handle the back and send, described ordering is handled and is specially: for the delay sensitive business, from the overtime line ordering that advances of the business packet of source AN and target AN, for non-delay sensitive business, the reverse data of in the scope that buffering area allows source AN being sent sends earlier, sends behind the reverse data that target AN sends.

The time point that described PDSN begins to send from the reverse data of target AN is:

The non-delay sensitive business datum of source AN all sends, and is connected some release time between source PCF and the PDSN;

Perhaps,

The data of source AN are delay sensitive business, and there had packet to occur to be overtime, then begins to send the data from target AN, initiate simultaneously with source PCF and PDSN between the release that is connected;

Perhaps,

Delay sensitive business datum from target AN will be overtime, then begin to send the data from target AN, initiate simultaneously with source PCF and PDSN between the release that is connected.

Method of the present invention also comprises:

Target AN does not receive the channel of self terminal to set up response message when timer expiry yet, then thinks terminal switching channels failure, and target AN sends being connected between switch failure information and release and PCF and the PDSN to source AN;

When source AN received the message of handoff failure, then source AN rebulid and being connected of terminal room, and the forward direction valid data of buffer memory are sent to terminal;

Perhaps,

When source AN detected the channel parameter of terminal recovery source AN, then source AN sent to terminal with the valid data of buffer memory.

Method of the present invention also comprises:

When PDSN discharge one with PCF between be connected the time, then PDSN will only send data to not discharging the PCF that connects, and no longer carry two indication informations of broadcasting in the data that send.

Described method also comprises:

D, between source AN and target AN, set up communication interface, and in handoff procedure, carry out data processing between source AN and the target AN based on described communication interface.

Described step D comprises:

D1, determine that the data between source AN and the target AN switch datum mark;

Carry out data processing based on the communication interface of described switching datum mark and foundation between D2, source AN and the target AN.

Described step D1 comprises:

After source AN is sent completely forward data, the last radio link protocol RLP sequence number that resets of its transmission is switched datum mark as forward data send to target AN;

Source AN receives and switches after the beginning message immediately to user terminal transmitting channel assignment TCA message, and and target AN between determine the switching datum mark that reverse data is handled.

Described step D2 comprises:

D21, carry out retransmission process for the forward data of switching before the datum mark by source AN, and after source AN is sent completely corresponding forward data, then notification target AN carries out retransmission process to the forward data of switching after the datum mark;

Perhaps,

D22, scoop up in the back data at the source AN of sending to by PDSN and to identify, indicate it no longer to send forward data to source AN.

Described step D21 also comprises:

When target AN data in buffer reached predetermined value or judges that terminal no longer needs source AN retransmission process, then notification source AN emptied its data in buffer.

Described step D2 comprises:

Send to PDSN for switching datum mark reverse data before by source AN, and after source AN sent to PDSN with all reverse datas, the reverse data that indicating target AN will switch after the datum mark sent to PDSN;

Perhaps,

Send reverse data simultaneously by source AN and target AN, and by PDSN according to the reverse data that receives from source AN preceding, the reverse data that receives from target AN after order sort.

Described step D also comprises:

During the sequence number of the RLP data that the switching datum mark of determining reverse data as target AN receives less than its expectation, then source AN is after the data before this switching datum mark of finishing dealing with, initiatively the reverse data that will receive is transferred to target AN processing, perhaps, by the data of target AN between the sequence number of the RLP data of user terminal requests re-transmission switching datum mark and its expectation reception.

Described step D also comprises:

The reverse data of the real time business in the AN of source, after the data before this switching datum mark of finishing dealing with, the reverse data that will receive is not transferred to target AN processing as if source AN, and then corresponding data will be dropped.

Described step D also comprises:

For a plurality of RLP examples, then carry out the source AN of RLP example and the data processing between the target AN by one or more signaling.

The business of switching between described source AN and the target AN comprises:

Real-time service and/or non-real time service.

As seen from the above technical solution provided by the invention, realization of the present invention makes source PCF and purpose PCF side to broadcast the caching process that indication information carries out data message according to two accordingly, thereby has improved reliability of data transmission in the handoff procedure.

Simultaneously, owing to two broadcast indication information along with message together transmits, can also guarantee that source PCF and purpose PCF can effectively identify need carry out data in buffer, and only carries out caching process at corresponding data; This mode, that not only can avoid sending separately twoly broadcasts Indication message and takies Internet resources, can also avoid broadcasting Indication message and in time not arriving the generation that PCF causes event of data loss owing to two, for example, broadcast Indication message and in time do not arrive purpose PCF because of two, must make on purpose PCF the situation of should data in buffer not carrying out caching process take place.

Description of drawings

Fig. 1 is a normal handoff process schematic diagram of the present invention;

Fig. 2 is for carrying out the process schematic diagram of data processing between source AN among Fig. 1 and the target AN;

Fig. 3 is the processing procedure schematic diagram during handoff failure among the present invention.

Embodiment

Main purpose of the present invention is for reliability of data transmission in the process that guarantees to switch between activated state AN in the HRPD network.To at first be introduced below, so that whole handoff process is had better understanding the several main technical points that relate among the present invention.

Among the present invention, after the success of the A10 establishment of connection between PDSN and the purpose PCF, then PDSN sends data to source PCF and purpose PCF simultaneously, need to prove, two indication informations of broadcasting also in the packet header of the data message that sends, have been increased among the present invention, be used to indicate these data to send simultaneously to source AN and target AN, source PCF/AN no longer continues to send to terminal after receiving this partial data, and just it is carried out caching process, simultaneously, in order to simplify the processing of PDSN, also adopt same processing mode at purpose PCF/AN.

Among the present invention, source AN receives from this partial data of buffer memory after the data of carrying Bi-casting (two broadcast indication) of the data of PCF to determine when send TCA (channel assignment) message according to the channel conditions and traffic attribute of terminal simultaneously, and the channel parameter information of carrying in the TCA message is then sent by target AN.If in the business that this AT (terminal) carries out the time delay sensitive traffic is arranged, then send TCA message to terminal at once.If have only non-delay sensitive business and channel condition better, then sending the data of not carrying Bi-casting information of buffer memory (non-data retransmission) back TCA message.For the reverse data of buffer memory, source AN continues to send to PCF and PDSN.

Among the present invention, the processing procedure of Inter-AN (interconnected AN)/Inter-PCF (interconnected PCF) direct-cut operation, promptly the direct-cut operation processing procedure of activated state AN specifically may further comprise the steps as shown in Figure 1:

Step 11: terminal AT sends routing update Route Update message to source AN, comprises the neighboring BS information that signal strength signal intensity is high in the described routing update message;

Step 12: source AN determines to carry out direct-cut operation according to routing update message, and determines corresponding target AN, then, sends handoff request A13-handoff Request message to target AN, comprises session information relevant with AT and target cell information in this message;

Step 13: target AN receives the checking of carrying out message after the handoff request message; If checking is passed through, Resources allocation then specifically comprises channel resource and handles resource, then, returns to source AN and to reply A13-handoff Request Ack message accordingly;

Step 14: the session configuration of source AN locking AT, promptly no longer carry out the renewal of session configuration information and handle, can't be known by target AN with the session configuration of avoiding upgrading in the handoff procedure;

Step 15: after the Lock Session configuration, source AN sends out switching command A13-handoffCommand message to target AN, comprises the address of PDSN in the described switching command message, parameters such as port numbers;

A13-handoff Commenced message was answered in response after step 16: target AN received switching command, and the channel assignment parameter is returned to source AN;

Step 17: source AN receives that sending out for behind the channel assignment handoff parameter target AN to switch the indication of beginning A13-handoff Start message to switch begins;

Step 18: target AN sets up A8 with purpose PCF and is connected after receiving and switching beginning message;

The message of wherein setting up A8 can increase to indicate to illustrate it is to switch between AN, need be with data distributing;

After step 19:PCF received that A9-Setup-A8 message is set up in the A9-A8 connection, purpose PCF initiated the A10 establishment of connection to PDSN, promptly sends A11-Registration Request to PDSN;

After step 110:A10 connected foundation, PDSN responded A11-Registration Reply message to purpose PCF response A11 registration;

Step 111: purpose PCF sets up the A10 connection and finishes, and finishes A8 foundation and feeds back A9-Connect-A8 (A9-A8 connection) message to target AN, and target AN stops timer TA8-Setup;

Step 112:PDSN judges it is because of after A10 that switching is set up connects (being that second A10 sets up), send data simultaneously to target P CF and source PCF, and increase B-icasting Indication (two broadcast indication) information in GRE (generic route encapsulation) packet header of the packet that sends at the same time, be used to show begun data simultaneously to target P CF and source PCF transmission;

Target P CF is transmitted to target AN after receiving data, and source PCF is transmitted to source AN after receiving data;

Step 113: source AN receives from this partial data of a buffer memory after the data of the indication of carrying Bi-casting of the data of PCF, and when sends TCA message according to the channel conditions and traffic attribute decision of terminal, and relevant parameters is sent by target AN;

Be specially: if the delay sensitive business, then send TCA message to terminal at once, if be that non-delay sensitive business and channel condition are better, then send out TCA message in data (non-data retransmission) back of not carrying the Bi-casting indication that sends buffer memory, if time delay and non-delay sensitive are professional and non-delay sensitive business exists simultaneously, then send TCA message at once;

For the reverse data of buffer memory, source AN continues to send to PCF and PDSN;

Step 114: terminal judges it is the sub-district of target AN after receiving TCA message, then returns the foundation of letter road to target AN and finishes message.Target AN receives that channel finishes the RLP that resets after the message, begin transmission delay then immediately and be no more than the forward data bag of requirement, the business data packet of the business data packet of the delay sensitive that i.e. transmission is not overtime and all non-delay sensitives is to terminal, in a word, in this step, only send the valid data of buffer memory to terminal;

Simultaneously, begin to receive reverse data, send to PCF and PDSN then;

Step 115: target AN sends UATI (management access terminal identification) assignment message to terminal;

Step 116:AT responds UATI assignment response message to target AN, and then, target AN and AT switch UATI simultaneously.

Step 117: target AN sends the session configuration to terminal and separates locking message;

Step 118:AT responds configuration to target AN and separates the locking response message;

Step 119: target AN sends the A13 session to source AN and discharges request, and the expression switching is finished;

Step 120: source AN responds the A13 session to target AN and discharges request-reply message;

Step 121: target AN sends UATI to source AN and discharges request, represents that this UATI is released;

Step 122:AT responds to target AN and sends UATI release request-reply message;

Step 123: after PCF/PDSN sent reverse data in the buffering area, source AN sent A9-Release-A8 (discharging A9-A8 connects) message, and starts timer TArel9, discharges the A8 link;

On PDSN, can receive reverse data information from source AN/PCF and target AN/PCF, PDSN handles the back and sends according to the situation of self buffer memory and the type of service line ordering of going forward side by side, described ordering is handled and is specially: for the delay sensitive business, from the overtime line ordering that advances of the business packet of source AN/PCF and target AN/PCF, for non-delay sensitive business, the reverse data of in the scope that buffering area allows source AN being sent sends earlier, sends behind the reverse data that target AN/PCF sends.

Begin to send from the time point of the reverse data of target AN/PCF respectively can for:

AN/PCF non-delay sensitive business datum in source all sends, and source AN/PCF is connected with A10 between the PDSN and discharges;

The data of source AN/PCF are delay sensitive business, and there had packet to occur to be overtime, then begins to send the data from target AN/PCF, no longer send the time-delayed sensitive data from source AN simultaneously, and it is all abandoned.Initiate the release that source PCF is connected with A10 between the PDSN simultaneously;

Delay sensitive business datum from target AN will be overtime, then begin to send the data from target AN/PCF, no longer send the time-delayed sensitive data from source AN/PCF simultaneously, and it is all abandoned.Initiate the release that source PCF is connected with A10 between the PDSN simultaneously.

Step 124: after source PCF receives the A9-Release-A8 message of former AN, send A11-Registration Request (A11 register requirement) message, discharge A10 and connect to PDSN;

Step 125:PDSN no longer sends data to source AN/PCF after discharging the A10 connection, no longer carries the Bi-casting indication simultaneously in the data that send afterwards in GRE packet header.Simultaneously return A11-Registration Reply message to source PCF, source PCF discharges the AIO connection resource;

Step 126: source PCF discharges A8 and connects, to source AN response A9-Release-A8 Complete message; Source AN stops timer TArel9.

In above-mentioned handoff process, for realizing the data processing between source AN and the target AN, the present invention also provides the direct-cut operation processing method when increasing business interface, between source AN and target AN, set up the corresponding business interface, can realize direct-cut operation between source AN and the target AN by corresponding processing.

For this reason, need be between source AN and target AN among the present invention increase business and signaling interface, below will be at first professionally describe with signaling interface to increasing between source AN and the target AN, wherein:

(1) described signaling interface protocol stack can for:

IOS Application, input-output system is used;

SCTP or TCP, SCTP or transmission control protocol;

IP, the IP agreement;

L2, two layers;

Physical Layer, physical layer;

(2) described business interface protocol stack can for:

User Traffic, user traffic flow;

RTP/UDP or TCP, RTP/User Datagram Protoco (UDP) or transmission control protocol;

IP, Internet protocol;

Link Layer, link layer;

Physical Layer, physical layer.

Based on the interface that increases between above-mentioned source AN and the target AN, source AN sends TCA message to terminal after receiving and switching beginning message at once.

Send TCA to terminal after, source AN and target AN determine that the point of reverse data processing is that benchmark carries out hand-off process with certain reverse data frame promptly.Wherein, send to PDSN after being handled by source AN for the data before the benchmark, the data after the benchmark are handled by target AN.During the sequence number of the RLP data that the datum mark of the reverse data migration of determining as target AN receives less than current AN expectation, after source AN handles datum mark data before, data after the datum mark that has received can be transferred to target AN handles, if source AN does not switch to target AN with the data after the datum mark, then retransmit this part data by target AN requesting terminal; For real-time service, if source AN is not moved to target AN with the data after the datum mark, then this part data will be dropped.

After then sending forward data by source AN for the processing of forward data, the last RLP sequence number that source AN side is sent sends to target AN as the benchmark sequence number, and target AN receives that the benchmark RLP sequence number that the back sends according to source AN continues to send data, and RLP need not reset.The RLP sequence number is retransmitted by source AN less than the bag of this benchmark sequence number in the repeat requests of terminal, is carried out retransmitting by target AN greater than the bag of this benchmark sequence number.Notification source AN empties data in buffer can judge that maybe terminal no longer needs source AN to retransmit the time when target AN data cached acquires a certain degree.

In handoff procedure, if when a plurality of RLP example is arranged, then can move each RLP example simultaneously, perhaps switch each RLP example respectively.

Indicating target AN can send reverse data to PDSN after source AN sends to PDSN with the revert all data; Perhaps source AN and target AN simultaneously send reverse data to PDSN, finish ordering by PDSN, are specially the reverse data that receives from source AN preceding, the reverse data that receives from target AN after.For forward data, the data that do not send as yet before source AN will switch send the forward data from PDSN that the back notification target AN that finishes can handle buffer memory.

Simultaneously, PDSN is sending to source AN, and promptly needing to identify these data in the GRE of last data of S-AN (routed encapsulation) head is last data; Send the signaling indication simultaneously and no longer send forward data to source AN/PCF.

To specifically as shown in Figure 2, comprise being described in conjunction with the accompanying drawings below based on the processing procedure in the corresponding handoff procedure of the interface between source AN and the target AN:

Step 21: target AN, promptly T-AN begins to carry out the merging processing of reverse data;

After merge handling, T-AN detects the SEQ (sequence number) of the reverse RLP data that receive, when SEQ＞=V (R), then definite described data need be handled on T-AN, and by these data of T-AN buffer memory, otherwise, by T-AN the RLP data are sent to S-AN and handle;

T-AN also needs the SEQ of first RLP data of buffer memory is noted, and is labeled as HO_SEQ (switching sequence number), HO_SEQ＞=V (R) then, and V (R) is the datum mark that reverse data switches;

Step 22:T-AN sends RLP migration beginning message to S-AN, and S-AN begins to carry out RLP data migration operation with indication;

Comprise HO_SEQ in the described RLP migration beginning message, only need handle the reverse data of reverse SLP data SEQ＜HO_SEQ when being used to indicate S-AN to handle reverse data;

Step 23: after receiving that sending conversation shift begins message, S-AN continues to handle the forward data that does not send as yet, up to handling the forward data that last does not send as yet;

Simultaneously, the reverse data that S-AN will receive from SEQ＜HO_SEQ of the SLP of T-AN, sorting according to SEQ sends to PDSN then;

After step 24:S-AN finishes the forward data transmission, send the forward data migration to T-AN and finish message, the indication forward data sends and finishes, carry RLP sequence number V (S) next to be sent in this message, RLP start sequence number as T-AN transmission forward data is the datum mark that forward data is switched;

T-AN returns ACK message to S-AN after receiving this message;

Need to prove that when target AN receives the request retransmission data that terminal is sent, and definite corresponding data is cached in source AN, then target AN is to source these data of AN request retransmission; The mode that described definite corresponding data is cached in source AN is: source AN sends when indicating target AN begins to send data after the forward data, tell target AN that it begins to send the RLP sequence number V (S) of data, when target AN sends forward data, if the sequence number of the data that terminal request retransmits is less than V (S), then the data that need retransmit are at source AN, otherwise the data that retransmit are at target AN;

If during the data that source AN need retransmit, source AN sends to target BS with packaged RLP data, thereby data are sent to terminal; Perhaps source AN sends the data to target AN, by re-sending to target BS behind the target AN encapsulation of data;

On target AN, the RLP sequence number of the data that the datum mark that reverse data switches may receive less than the current hope of source AN, in this case, after source AN handles datum mark data before, untreated data after the datum mark can be transferred to target AN and handle, perhaps retransmit this part data by target AN requesting terminal;

For real-time service, directly abandon or transfer to object-side processing during the RLP sequence number of the data that the datum mark that reverse data switches receives less than the current hope of source AN;

In addition, among the present invention, do not have the disposition of re-transmission for real-time service, target is surveyed and is begun to send forward data after source is handled forward data, does not need request source to stress to pass data.

Step 25:T-AN begins to send data to terminal after receiving that message is finished in the forward data migration;

Step 26:S-AN sends the back that finishes with reverse data and finishes message to the migration of T-AN transmission reverse data, and the indication reverse data sends and finishes;

In the conversation shift process, the reverse data before the datum mark that S-AN also needs reverse data is switched sends to PDSN, and after being sent completely, sending the reverse data migration to T-AN and finish message;

That is to say, S-AN is after its forward data or reverse data that need handle of finishing dealing with, then need to send the migration of corresponding forward data or reverse data and finish message to T-AN, the time that two kinds of data processing are finished there is no fixing sequencing, and the sequential relationship shown in Fig. 3 only is an instantiation; For a plurality of RLP examples, can carry out the migration of RLP example by one to many signalings.

Among the present invention, also provide the processing procedure when handoff process is failed between activated state AN, as shown in Figure 3, specifically comprised following operation process:

Step 31:AT sends routing update message to source AN, comprising the high neighboring BS information of signal strength signal intensity;

Step 32: source AN determines to carry out direct-cut operation according to routing update message, then sends handoff request message to target AN, comprises session information relevant with AT and target cell information in this message;

Step 33: target AN receives the checking of carrying out message after the handoff request message; If checking is passed through, then Resources allocation comprises channel resource and handles resource.Respond then and answer message.

Step 34: the session configuration of source AN locking AT.

Step 35: after the Lock Session configuration, source AN sends out switching command to target AN, and this message comprises the address of PDSN, parameters such as port numbers.

Response was answered message and the channel assignment parameter is returned to source AN after step 36: target AN received switching command.

Step 37: source AN receives that sending out for behind the channel assignment handoff parameter target AN to switch the indication of beginning message to switch begins.

Step 38: target AN sets up A8 with purpose PCF and is connected after receiving and switching beginning message.The message of wherein setting up A8 can increase to indicate to illustrate it is to switch between AN, need be with data distributing.

After step 39:PCF received A9-Setup-A8 message, purpose PCF initiated the A10 establishment of connection to PDSN.

After step 310:A10 connected foundation, PDSN was to purpose PCF response A11-RegistrationReply message;

Step 311: purpose PCF sets up the A10 connection and finishes, and finishes A8 foundation and feeds back A9-Connect-A8 message to target AN, and target AN stops timer TA8-Setup;

Step 312:PDSN judges it is that A10 (second A10 foundations) because of switching is set up then sends data simultaneously to target P CF and source PCF, and increase B-icasting Indication information in the GRE packet header of the packet that sends at the same time, show to begin data are sent to target P CF and source PCF simultaneously; Target P CF is transmitted to target AN after receiving data, and source PCF is transmitted to source AN after receiving data;

Step 313: source AN receives from this partial data of a buffer memory after the data of the indication of carrying Bi-casting of the data of PCF, and according to the channel conditions and traffic attribute of terminal when decision sends TCA message, the assignment parameter of carrying in the message is then sent by target AN;

Concrete processing procedure is: if the delay sensitive business, then send TCA message to terminal at once, if be non-delay sensitive business and channel condition better (being that channel quality meets predetermined condition) always, then send out TCA message in data (non-data retransmission) back of not carrying the Bi-casting indication that sends buffer memory, if the situation of predetermined condition appears not meeting in channel quality, then send TCA message immediately; If time delay and non-delay sensitive are professional and non-delay sensitive business exists simultaneously, then send TCA message at once.For data in buffer, source AN continues to send to PCF and PDSN;

Step 314:, then recover the cell channel under the AN of source automatically if terminal is received the sub-district that can't normally switch to target AN after the TCA message;

Step 315: target AN does not receive that channel is set up and finishes message, send switch failure information to source AN behind timer expiry;

Step 316: source AN receives the reverse indication of waiting for terminal after the switch failure information, receives to begin to continue the data that the data of double wave indication arranged and need to retransmit to reverse transmission after the reverse index signal that terminal recovers, and continues to handle reverse data;

Step 317: source AN responds the handoff failure response message to target AN;

Step 318: target AN initiates the release that A8/A10 connects, after PDSN discharges the A10 connection, no longer send data to target AN/PCF, in the data that send to source AN, no longer carry the Bi-casting indication simultaneously in GRE packet header, be the handoff procedure failure, the data transmit-receive processing procedure of terminal AT return back to source PCF/AN side and carries out.

In sum, be not difficult to find out, realization of the present invention can effectively guarantee in the HRPD network to realize between activated state AN reliability of data transmission in the handoff process, and can avoid the transmission of partial invalidity data (as the overtime data of delaying time) to take Internet resources, therefore, the handoff process between activated state AN provided by the invention is simple, reasonable.

The above; only be the preferable embodiment of the present invention; but protection scope of the present invention is not limited thereto; anyly be familiar with those skilled in the art in the technical scope that the present invention discloses; (comprising: message name can be message name arbitrarily for the variation that can expect easily or replacement; corresponding treatment step also can be different), all should be encompassed within protection scope of the present invention.

Therefore, protection scope of the present invention should be as the criterion with the protection range of claim.

Claims

1, the method for switching between realization activated state AN in a kind of network is characterized in that, comprising:

2, the method for switching between realization activated state AN in the network according to claim 1 is characterized in that when switching between the AN that belongs to different PCF, described step B comprises:

3, the method for switching between realization activated state AN in the network according to claim 2 is characterized in that described step C also comprises:

4, the method for switching between realization activated state AN in the network according to claim 3 is characterized in that, carries out described step C1 and also comprises before:

5, the method for switching between realization activated state AN in the network according to claim 4 is characterized in that described step C0 comprises:

6, according to the method that realizes in each described network of claim 1 to 5 switching between activated state AN, it is characterized in that described step C also comprises:

7, according to the method that realizes in each described network of claim 1 to 5 switching between activated state AN, it is characterized in that described step C also comprises:

8, the method for switching between realization activated state AN in the network according to claim 7 is characterized in that this method also comprises:

9, realize the method switched between activated state AN in the network according to claim 8, it is characterized in that the time point that described PDSN begins to send from the reverse data of target AN is:

Perhaps,

10, according to the method that realizes in each described network of claim 1 to 5 switching between activated state AN, it is characterized in that this method also comprises:

Perhaps,

11, according to the method that realizes in each described network of claim 1 to 5 switching between activated state AN, it is characterized in that this method also comprises:

12, according to the method that realizes in each described network of claim 1 to 5 switching between the activated state AN, it is characterized in that described method also comprises:

13, the method for switching between the realization activated state AN in the network according to claim 12 is characterized in that described step D comprises:

14, the method for switching between the realization activated state AN in the network according to claim 13 is characterized in that described step D1 comprises:

15, the method for switching between the realization activated state AN in the network according to claim 13 is characterized in that described step D2 comprises:

Perhaps,

16, the method for switching between the realization activated state AN in the network according to claim 15 is characterized in that described step D21 also comprises:

17, the method for switching between the realization activated state AN in the network according to claim 13 is characterized in that described step D2 comprises:

Perhaps,

18, the method for switching between the realization activated state AN in the network according to claim 17 is characterized in that described step D also comprises:

19, the method for switching between the realization activated state AN in the network according to claim 18 is characterized in that described step D also comprises:

20, the method for switching between the activated state AN in the network according to claim 12 is characterized in that, described step D also comprises:

21, the method for switching between the activated state AN in the network according to claim 12 is characterized in that, the business of switching between described source AN and the target AN comprises:

Real-time service and/or non-real time service.