CN1832420A - Method for implementing active state hard switchover in high speed block data system - Google Patents
Method for implementing active state hard switchover in high speed block data system Download PDFInfo
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Abstract
This invention discloses a method for realizing activated state hard switch in a high speed packet data system including: after target AN receives the switch request information sent by AT, it gets the session layer information from the source AN related to AT to set up A8 and A9 links with PCF based on the session layer information , target AN sends the service channel information assigned to AT to source AN, which releases link A9 and sends said service channel information to the AT setting up service channel connection with target AN, which assigns an exclusive UATI for AT and sends the UATI to AT, target AN activates link A9, AT sets up PPP service link via target AN and activates packet data connection by target AN.
Description
Technical field
The present invention relates to the handoff technique field in HRPD (high rate packet data) (HRPD) system, be meant a kind of method that in the HRPD system, realizes the activated state direct-cut operation especially.
Background technology
HRPD network air-interface standard, is strengthened a lot of system performances after the A version by 0 edition upgrading, for example power system capacity, service quality (QoS) etc., and these improvement make that the HRPD network need be supported more at a high speed, real-time requires higher Packet Service.In this standard, about the flow definition of switching aspect between dormancy switching between Access Network (AN) and AN, Packet Control Function (PCF) and PCF dormancy switch, each is called out starts, discharges various switching flows between flow process and HRPD network and the cdma2000 network.And to not defining in HRPD network internal activated state direct-cut operation flow process.In order to guarantee that these business better carry out, guarantee the user under state of activation, stride AN, when striding PCF, business can have better continuation and real-time requirement, is realizing between AN, between PCF that the activated state direct-cut operation becomes more urgent a kind of demand.
And, dormant state switches between the AN that present HRPD standard provides, between PCF, in handoff procedure, need to discharge the PPP that is using and connect, PDSN need connect for objective network distributes new PPP, on the one hand, newly assigned PPP connects and may distribute failure because reasons such as problem of resource cause, and makes user's service disconnection, on the other hand, connect because PDSN need rebulid a PPP, can cause bigger time delay influence the current business of user.
Summary of the invention
In view of this, the object of the present invention is to provide a kind of method that in high-speed grouped data system, realizes the activated state direct-cut operation, make the user terminal that is in state of activation in the HRPD system between AN, when mobile, can realize direct-cut operation.
In order to achieve the above object, the invention provides a kind of method that in high-speed grouped data system, realizes the activated state direct-cut operation, the user terminal A T that is applied to carry out the activated state data service just from source Access Network AN to the process that target AN moves, and the PCF under target AN and the source AN is identical, and this method is achieved in that
A. after target AN receives the handoff request message of AT transmission, from the AN of source, obtain the session layer information relevant with this AT, and according to setting up A8, A9 link between described session layer information and the PCF;
B. target AN will be sent to source AN for the traffic channel information of this AT assignment, source AN stop and PCF between the A9 link transmission, and described traffic channel information sent to AT, AT sets up Traffic Channel with target AN and is connected;
C. target AN is that AT distributes a unique customer temporary identity sign UATI, and this UATI is sent to AT, the A9 link between target AN activation and the PCF;
D.AT sets up the PPP service link by target AN, and activates the grouped data connection by target AN;
E. target AN sends and handoffs completion message to source AN, A8, A9 link between source AN release and the PCF.
Step a comprises:
After a1, target AN receive the handoff request message that AT sends, send Information Request, return the session related news of current AT with request source AN to source AN;
After a2, source AN received this conversation request message, the session layer information relevant with AT that self is saved in sent to target AN by session information response message;
After a3, target AN receive session information response message, set up A8, A9 connection request to the PCF transmission;
A4, PCF set up A8, A9 link after receiving and setting up A8, A9 connection request, and send A8, A9 response message to target AN.
Described Information Request sends by the A13 interface.
In execution in step a1, further comprise: a11: source AN starts the timer TA13req that sets in advance,
Then in step a3, if target AN does not receive session information response message before timer TA13req is overtime, then return step a1, or jump out this flow process.
Step b comprises:
B1, described Traffic Channel Assignment information are to send to source AN by the session information acknowledge message;
After b2, source AN receive the session information acknowledge message of target AN transmission, send A9ALDisconnected message, and start timer TAld9 to PCF;
B3, PCF stop the A9 link after receiving the A9AL Disconnected message of source AN, and return A9AL Disconnected Ack message;
B4, source AN send Traffic Channel Assignment message to AT according to the Traffic Channel Assignment information of the target AN assignment that comprises in the session information acknowledge message;
B5, AT receive Traffic Channel Assignment message, and set up Traffic Channel between target AN and are connected, and after connecting, the feedback Traffic Channel is finished message to target AN.
The AN of target described in the step b fails correctly to receive the A13 session information response message that source AN sends, and then feeds back A13 session information refuse information to source AN, and this flow process finishes.
Step c comprises:
C11, target AN send the UATI assignment message to AT, for AT distributes a new UATI;
After c12, AT receive, return target AN UATI assignment and finish message;
C13, target AN are by the A9 link between A9AL Connected message activation and PCF, and startup timer TAlc9;
C14, PCF feedback A9AL Connected Ack message is to target AN.
Step e comprises:
E11, target AN send A13 session information acknowledge message to source AN, notification source AN handover success.If the aforesaid operations failure, target AN feeds back handoff failure by A13 session information refuse information;
After e12, source AN receive target AN handover success message, send A9-Release-A8 message, and start timer TArel9, discharge A8, A9 link;
After e13, PCF receive the A9-Release-A8 message of source AN, discharge A8, A9 link.
Another kind provided by the invention is realized the method for activated state direct-cut operation in high-speed grouped data system, the AT that is applied to carry out the activated state data service just from source AN to the process that target AN moves, and the PCF under target AN and the source AN is inequality, and this method is achieved in that
A. after target AN receives the handoff request message of AT transmission, from the AN of source, obtain the session layer information relevant with this AT, and according to setting up A8, A9 link between described session layer information and the target P CF;
B. target AN will be sent to source AN for the traffic channel information of this AT assignment, source AN stop and source PCF between the A9 link transmission, and described traffic channel information sent to AT, AT sets up Traffic Channel with target AN and is connected;
C. target AN is that AT distributes a unique customer temporary identity sign UATI, and this UATI is sent to AT, the A9 link between target AN activation and the target P CF, and the A11 link switchover between handover source PCF and the PDSN is between target P CF and the PDSN;
D.AT sets up the PPP service link by target AN, and activates the grouped data connection by target AN;
E. target AN sends and handoffs completion message to source AN, A8, A9 link between source AN release and the source PCF.
Steps A comprises:
After A1, target AN receive the handoff request message that AT sends, send Information Request, return the session related news of current AT with request source AN to source AN;
After A2, source AN received this conversation request message, the session layer information relevant with AT that self is saved in sent to target AN by session information response message;
After A3, target AN receive session information response message, set up A8, A9 connection request to the PCF transmission;
A4, PCF set up A8, A9 link after receiving and setting up A8, A9 connection request, and send A8, A9 response message to target AN.
Described Information Request sends by the A13 interface.
In execution in step A1, further comprise: A11: source AN starts the timer TA13req that sets in advance,
Then in steps A 3, if target AN does not receive session information response message before timer TA13req is overtime, then return steps A 1, or jump out this flow process.
Step B comprises:
B1, described Traffic Channel Assignment information are to send to source AN by the session information acknowledge message;
After B2, source AN receive the session information acknowledge message of target AN transmission, send A9ALDisconnected message, and start timer TAld9 to PCF;
B3, PCF stop the A9 link after receiving the A9AL Disconnected message of source AN, and return A9AL Disconnected Ack message;
B4, source AN send Traffic Channel Assignment message to AT according to the Traffic Channel Assignment information of the target AN assignment that comprises in the session information acknowledge message;
B5, AT receive Traffic Channel Assignment message, and set up Traffic Channel between target AN and are connected, and after connecting, the feedback Traffic Channel is finished message to target AN.
The AN of target described in the step B fails correctly to receive the A13 session information response message that source AN sends, and then feeds back A13 session information refuse information to source AN, and this flow process finishes.
Step C comprises:
C21, target AN send the UATI assignment message to AT, for AT distributes a new UATI;
After C22, AT receive, return target AN UATI and finish message;
C23, target AN are by the A9 link between A9-AL Connected message activation and PCF, and startup timer TAlc9;
C24, target P CF register a new A11 link by A11-Registration Request message between target P CF and PDSN, the address of PDSN is the PDSN IP address of carrying in the A13 session information response message here, and start timer TregReq;
C25, PDSN receive the A11 connection request, send A11-Registration Reply message to target P CF, and termination timing device TregReq;
C26, PCF feedback A9AL-Connected Ack message is to target AN, and termination timing device TAlc9.
Step e comprises:
E21, target AN send A13 session information acknowledge message to source AN, notification source AN handover success;
After E22, source AN receive target AN handover success message, send A9-Release-A8 message, and start timer TArel9, discharge A8, A9 link;
E23, source PCF transmission A11-Registration Request message is to PDSN, and Lifetime is set to 0, application release A11 connection, and startup timer TregReq;
E24, PDSN send A11-Registration Reply message to source PCF, and discharge A11 and connect, and termination timing device TregReq;
After E25, PCF receive the A9-Release-A8 message of source AN, discharge A8, A9 link, and termination timing device TArel9.
The method that realizes the activated state direct-cut operation in high-speed grouped data system provided by the invention has realized activated state direct-cut operation between the AN of HRPD system, between PCF.If AT switch between AN and also situation that target AN is identical with PCF under the AN of source under, the present invention keeps terminal Session layer parameter to remain unchanged, to the PDSN side in handoff procedure, and need not to this user distributes new ppp link, the IP address before and after terminal is switched is constant.This method can also improve success rate for switching, shortens because the time that the connection that direct-cut operation causes is interrupted, and guarantees few being lost of trying one's best of the mutual packet of user and packet network simultaneously.
Description of drawings
Fig. 1 for the present invention switch between AN and also situation that target AN is identical with PCF under the AN of source under schematic flow sheet;
Fig. 2 is the schematic flow sheet of the present invention under the situation inequality of the PCF under switching and target AN and the source AN between AN;
Figure 3 shows that the embodiment schematic flow sheet of direct-cut operation of the present invention shown in Figure 1;
Figure 4 shows that the embodiment schematic flow sheet of direct-cut operation of the present invention shown in Figure 2.
Embodiment
Method of the present invention be applied to AT from source AN to the process that target AN moves, and AT and source AN, PCF and PDSN are carrying out the activated state data service.Method of the present invention can be divided into two kinds of situations, and a kind of AT of being switches between AN, and the target AN PCF identical situation affiliated with source AN; Another kind is that AT switches between AN, but the PCF situation inequality under target AN and the source AN.
For first kind of situation, after target AN receives the handoff request message that AT sends, from the AN of source, obtain the session layer information relevant with this AT, and according to setting up A8, A9 link between described session layer information and the PCF; Then, target AN sends to this traffic channel information to source AN, source AN stop and PCF between the A9 link transmission, and described traffic channel information sent to AT, AT utilizes this traffic channel information to set up Traffic Channel with target AN to be connected again.And target AN need distribute a unique customer temporary identity sign (UATI) for AT, and this UATI is sent to AT, the A9 link between target AN activation and the PCF; After this, AT sets up the PPP service link by target AN, and activates the grouped data connection by target AN, and target AN sends and handoffs completion message to source AN, A8, A9 link between source AN release and the PCF, and direct-cut operation is finished.
Referring to shown in Figure 1, at first kind of situation, the present invention realizes that the detailed process of direct-cut operation is as follows:
Step 101: target AN obtains the session layer information relevant with this AT after receiving the handoff request message of AT transmission from the AN of source, and according to setting up A8, A9 link between described session layer information and the PCF.
Step 102: target AN will be sent to source AN for the traffic channel information of this AT assignment, source AN stop and PCF between the A9 link transmission, and described traffic channel information sent to AT, AT sets up Traffic Channel with target AN and is connected.
Step 103: target AN is that AT distributes a unique customer temporary identity sign UATI, and this UATI is sent to AT, the A9 link between target AN activation and the PCF.
Step 104:AT sets up the PPP service link by target AN and PDSN, and activates the grouped data connection by target AN.
Step 105: target AN sends and handoffs completion message to source AN, A8, A9 link between source AN release and the PCF.
At second kind of situation, after target AN receives the handoff request message that AT sends, from the AN of source, obtain the session layer information relevant with this AT, and according to setting up A8, A9 link between described session layer information and the target P CF.Then, target AN will be sent to source AN for the traffic channel information of this AT assignment, source AN stop and source PCF between the A9 link transmission, and described traffic channel information sent to AT, AT sets up Traffic Channel with target AN and is connected.Target AN is that AT distributes a unique UATI, and this UATI is sent to AT, the A9 link between target AN activation and the target P CF, and new A11 link of registration between target P CF and the PDSN.AT sets up the PPP service link by target AN, and activates the grouped data connection by target AN.Simultaneously, target AN sends and handoffs completion message to source AN, A8, A9 link between source AN release and the source PCF, and the A11 link between source PCF release and the PDSN, direct-cut operation is finished.
See shown in Figure 2ly, for second kind of situation, the present invention realizes that the detailed process of direct-cut operation is as follows:
Step 201: target AN obtains the session layer information relevant with this AT after receiving the handoff request message of AT transmission from the AN of source, and according to setting up A8, A9 link between described session layer information and the target P CF.
Step 202: target AN will be sent to source AN for the traffic channel information of this AT assignment, source AN stop and source PCF between the A9 link transmission, and described traffic channel information sent to AT, AT sets up Traffic Channel with target AN and is connected.
Step 203: target AN is that AT distributes a unique customer temporary identity sign UATI, and this UATI is sent to AT, the A9 link between target AN activation and the target P CF, and new A11 link of registration between target P CF and the PDSN.
Step 204:AT is by setting up the PPP service link between target AN and the PDSN, and activates grouped data by target AN and connect.
Step 205: target AN sends and handoffs completion message to source AN, A8, A9 link between source AN release and the source PCF, the A11 link between source PCF release and the PDSN.
Below, lift specific embodiment and describe technical scheme of the present invention in detail respectively with above-mentioned two kinds of situations.
Figure 3 shows that AT switch between AN and also situation that target AN is identical with PCF under the AN of source under the schematic flow sheet of direct-cut operation.
Referring to shown in Figure 3, the detailed process that present embodiment carries out direct-cut operation is as follows:
301:AT is carrying out the activated state data service by source AN, source PCF and PDSN.At this moment, A8, A10 bearing link are in connection status, have ppp link between AT and the PDSN.
302:AT sends routing update (Route Update) message to source AN, comprising the high adjacent area list information of signal strength signal intensity.
303:AT sends UATI request (UATI Request) message to target AN, and with notification target AN, self need switch to target AN.
304: after target AN receives the UATI request message that AT sends, send A13 Information Request (A13-Session Information Request) message to source AN by the A13 interface, be used to apply for that source AN returns the current session related information of this AT, and start timer TA13req.
305: after source AN receives the A13 conversation request message that target AN sends, the session layer information relevant with this AT of self preserving is sent to target AN by A13 session information response (A13-SessionInformation Response) message.
Here, if target AN received the AT associated session layer information that source AN sends before timer TA13req is overtime, just need execution in step 306, if and target AN did not receive the AT associated session layer information that source AN sends before timer TA13req is overtime, can write down the number of times that sends this message, re-execute step 304, send the A13 Information Request once more to source AN.Certainly, if the number of times that carries out equals or exceeds predefined frequency threshold value, then handoff failure is jumped out this flow process.
306: target AN sends A8, A9 to PCF and connects foundation request (A9-Setup-A8) message according to the session layer relevant information of this AT of the source AN transmission that receives, and startup timer TA8-Setup.
After 307:PCF receives that A8, A9 connect the request of foundation, set up A8, A9 and connect, and connect (A9-Connect-A8) message to target AN transmission A8, A9.
Here, target AN before timer TA8-Setup is overtime, receive A9-Connect-A8 message after, execution in step 308; If after target AN before timer TA8-Setup is overtime, does not receive A9-Connect-A8 message, can re-execute step 306, re-execute the certain number of times of step 306 after, still do not receive A9-Connect-A8 message, handoff failure is jumped out this flow process.
308: after setting up A8, A9 connection, target AN is this AT assignment Traffic Channel, and the traffic channel information of assignment is confirmed that by the A13 session information (A13-Session InformationConfirm) message sends to source AN.
309: after source AN receives A13 session information acknowledge message from target AN, send and stop A9 interface (A9AL Disconnected) message, and start timer TAld9 to PCF.
Simultaneously, after source AN receives A13 session information acknowledge message, will send the A13 session information response message to target AN.And if target AN fails correctly to receive the A13 session information response message that source AN sends, then feed back A13 session information refuse information to source AN, this flow process finishes.
310:PCF stops the A9 link transmission after receiving the A9AL Disconnected message of source AN, and returns and stop A9 interface response (A9AL Disconnected Ack) message.
Here, if source AN timer TAld9 do not have overtime before, receive A9ALDisconnected Ack message, then execution in step 311, if timer TAld9 do not have overtime before, do not receive A9AL Disconnected Ack message, can re-execute step 309, behind repeated execution of steps 309 certain number of times, still not receive A9AL Disconnected Ack message, then handoff failure is jumped out this flow process.
311: source AN sends Traffic Channel Assignment (Traffic ChannelAssignment) message to AT according to the content of the target AN that comprises in the A13-Session Information Confirm message for the traffic channel information of this AT assignment.
After 312:AT receives Traffic Channel Assignment message, AT utilizes the Traffic Channel Assignment parameter of target AN assignment to be linked into target AN, with set up Traffic Channel between target AN and be connected, and the feedback Traffic Channel is finished (Traffic Channel Complete) message to target AN.
313: after target AN receives Traffic Channel Complete message, be UATI of this AT distribution, and distribute (UATI Assignment) message to send to AT by UATI this UATI information.
After 314:AT receives UATI Assignment message, the UATI parameter of utilizing UATI information updating self to preserve, and to target AN transmission UATI response (UATI Complete) message.
315: after target AN receives this UATI Complete message, send A9 and connect (A9ALConnected) message,, and start timer TAlc9 with the A9 link between activation and PCF to PCF.
After 316:PCF receives A9AL Connected, activate the A9 link, and feedback A9 connection response (A9AL Connected Ack) message is to target AN.
317: after this, AT can be by setting up the PPP service link between target AN and the PDSN, and activate grouped data by target AN and connect.
318: behind handover success, target AN sends the A13 session information and confirms that (A13-SessionInformation Confirm) message is to source AN, notification source AN handover success.If above-mentioned handover operation failure, target AN can give AT by A13 session information refuse information, the feedback handoff failure.
319: after source AN receives the A13-Session Information Confirm message of target AN transmission, send release A8, A9 and connect (A9-Release-A8) message, and start timer TArel9, release A8, A9 link.
After 320:PCF receives the A9-Release-A8 message of source AN, discharge A8, A9 link, and send release A8, A9 connection response (A9-Release-A8compete) message to source AN.If source AN does not receive A9-Release-A8compete message at timer TArel9, execution in step 319 once more then.
Below in conjunction with Fig. 4 activated state direct-cut operation realization flow between AN is described.
Step 401:AT is carrying out the activated state data service by source AN, source PCF and PDSN.At this moment, A8, A10 bearing link are in connection status, have ppp link between AT and the PDSN.
Step 402:AT sends Route Update message to source AN, comprising the high neighboring BS information of signal strength signal intensity.
Step 403:AT sends UATI Request message to target AN, with notification target AN, self needs switching target AN.
After step 404: target AN receives the UATI Reques message that AT sends, send A13-Session Information Request message to source AN by the A13 interface, application source AN returns the session related news of current AT, and starts timer TA13req, to begin switching.
Step 405: after source AN receives the A13-Session Information Request message that target AN sends, the session layer information relevant with this AT that is saved among the AN of source is sent to target AN by A13-SessionInformation Response message, and termination timing device TA13req.
Here, if target AN received the AT associated session layer information that source AN sends before timer TA13req is overtime, just need execution in step 406, if and target AN did not receive the AT associated session layer information that source AN sends before timer TA13req is overtime, can write down the number of times that sends this message, re-execute step 404, send the A13 Information Request once more to source AN.Certainly, if the number of times that carries out equals or exceeds predefined frequency threshold value, then handoff failure is jumped out this flow process.
After step 406: target AN receives the AT associated session layer information that source AN sends,, send A9-Setup-A8 message, and start timer TA8-Setup to target P CF according to AT associated session layer information.After step 407:PCF receives A9-Setup-A8 message, set up A8, A9 and connect, and feedback A9-Connect-A8 message.
Here, target AN before timer TA8-Setup is overtime, receive A9-Connect-A8 message after, execution in step 308; If after target AN before timer TA8-Setup is overtime, does not receive A9-Connect-A8 message, can re-execute step 406, re-execute the certain number of times of step 406 after, still do not receive A9-Connect-A8 message, handoff failure is jumped out this flow process.
Step 408: target AN replys source AN by A13-SessionInformation Confirm after successfully setting up A8, A9 connection, carries the Traffic Channel Assignment message that target AN will send to AT in the message.
Step 409: after source AN receives the A13-Session Information Confirm message of target AN, send A9AL Disconnected message, stop the A9 interface and start timer TAld9 to former PCF.
Simultaneously, after source AN receives A13 session information acknowledge message, will send the A13 session information response message to target AN.And if target AN fails correctly to receive the A13 session information response message that source AN sends, then feed back A13 session information refuse information to source AN, this flow process finishes.Step 410: former PCF stops the A9 link transmission after receiving the A9AL Disconnected message of source AN, and returns A9AL Disconnected Ack message, and termination timing device TAld9.
Here, if source AN timer TAld9 do not have overtime before, receive A9ALDisconnected Ack message, then execution in step 411, if timer TAld9 do not have overtime before, do not receive A9AL Disconnected Ack message, can re-execute step 409, behind repeated execution of steps 409 certain number of times, still not receive A9AL Disconnected Ack message, then handoff failure is jumped out this flow process.
Step 411: source AN sends Traffic Channel Assignment message to AT according to the target AN Traffic Channel Assignment message content that comprises in the A13-Session Information Confirm message.
Step 412:AT switches to target AN after receiving Traffic Channel Assignment message, and sets up Traffic Channel between target AN and is connected, set up finish after, feedback Traffic ChannelComplete message is to target AN.
Step 413: target AN sends the UATI assignment message to AT, for AT distributes a new UATI, this UATI information is sent to AT by UATI Assignment message.
After step 414:AT receives this UATI Complete message, the UATI parameter of utilizing UATI information updating self to preserve, and to target AN transmission UATI Complete message.
After step 415: target AN receives this UATI Complete message,, and start timer TAlc9 by the A9 link between A9-AL Connected message activation and PCF.
Step 416: target P CF registers a new A11 link by A11-Registration Request message between target P CF and PDSN, here the address of PDSN is the PDSN IP address of carrying in the A13 session information response message, and starts timer TRegReq.
Step 417:PDSN receives the A11 connection request, sends A11-Registration Reply message to target P CF, and termination timing device TRegReq.
Step 418:PCF feedback A9AL-Connected Ack message is to target AN, and termination timing device TAlc9.
Step 419:AT sets up the PPP service link by target AN, and activates the grouped data connection by target AN.
Step 420: handover success, target AN send A13 session information acknowledge message to source AN, notification source AN handover success.If the aforesaid operations failure, target AN feeds back handoff failure by A13 session information refuse information.
Step 421: after source AN receives target AN handover success message, send A9-Release-A8 message, and start timer TArel9, discharge A8, A9 link.
Step 422: source PCF transmission A11-Registration Request message is to PDSN, and Lifetime is set to 0, application release A11 connection, and startup timer TRegReq.
Step 423:PDSN sends A11-Registration Reply message to source PCF, and discharge A11 and connect, and termination timing device TRegReq.
Step 424: after source PCF receives the A9-Release-A8 message of source AN, discharge A8, A9 link, and termination timing device TArel9.
State in realization in two direct-cut operation flow processs, use the information between A13 interface transmission source AN and the target AN.Because the A13 interface has defined and has been used to support the message switched in the prior art, supports the direct-cut operation of activated state in order to utilize existing A13 interface message, can have on the A13 interface message basis in the source message content is expanded.
The A13 message that the present invention uses is defined as follows:
(1) A13-Session Information request message.Ginseng is shown in Table 1, this message comprises A13 type of message (A13Message Type), UATI128 (Unicast Access TerminalIndicator 128, wherein 128 are unique indication that accesses terminal) Security Layer Packet and Target Cell Identifier (Sector ID).This message is used for target AN to the relevant parameter of source AN application designated terminal session, and these parameter objectives AN need use in handoff procedure, and this message content can satisfy the requirement of activated state direct-cut operation, so can not revise.
| Information unit | Direction of transfer | Type | |
| A13Message Type | Target side is to former side | M | |
| UATI 128 | Target side is to former side | O | R |
| Security Layer Packet | Target side is to former side | O | R |
| SectorID(target) | Target side is to former side | O | R |
Table 1
(2) A13-Session Information Confirm message.
The session related information of this message designated terminal that to be target AN send correct reception sources AN is replied.In activated state is switched, after switching is finished, target AN need send handover success message to source AN, discharge the terrestrial links information that does not also discharge to trigger source AN, therefore, in this message, need one of expansion to confirm type field, be used to indicate source AN, it still is that handover success is replied that this response message indicating target AN has correctly received the designated terminal session related information that source AN sends.
Simultaneously, can set up Traffic Channel fast in order to make terminal switch to target AN, here the Traffic Channel Assignment message of target AN can be encapsulated in this message, together send to source AN, the channel assignment message that sends target AN by source AN is connected to make things convenient for terminal and target AN to set up the connection layer to terminal.This field is to send at the session information whether feedback correctly introduces the formulation terminal that source AN sends only.The structure of existing standard A13-Session Information Confirm message is as shown in table 2, and this A13-Session Information Confirm message comprises A13 Message Type and UATI128.In the present invention, (TrafficChannelAssignment message, TCA) with Confirm Type, promptly ginseng being shown in Table 3 to advise that standard A 13-Session Information Confirm message is further increased objective network Traffic Channel Assignment message.
| Information unit | Direction of transfer | Type |
| A13Message Type | Target side is to former side | M |
| UATI 128 | Target side is to former side | O | R |
Table 2
| Information unit | Direction of transfer | Type | |
| A13Message Type | Target side is to former side | M | |
| UATI 128 | Target side is to former side | O | R |
| TCA | Target side is to former side | O | R |
| Confirm Type | Target side is to former side | O | R |
Table 3
(3) A13-Session Information Reject message.This message is the session related information that target AN does not have the designated terminal that correct reception sources AN sends.In activated state was switched, if handoff failure, target AN need send switch failure information to source AN, therefore in the Cause territory of this message, needed to increase the handoff failure cause value.
| Information unit | Direction of transfer | Type | |
| A13Message Type | Former side is to target side | M | |
| UATI 128 | Former side is to target side | O | R |
| Cause | Former side is to target side | O | R |
Table 4
In the standard A 13-Session Information Reject message, the Cause cause value is defined as follows:
Cause value=01H (protocol sublayers can not be discerned)
02H (the protocol sublayers attribute can not be discerned)
03H (the protocol sublayers attribute is lost)
04H (not finding the session of application)
05H (session of application is incredible)
Suggestion increases new Cause value, is defined as follows:
Cause value=06H (handoff failure)
This Cause value may be defined as 06H, also can be defined as other and keep numeral, 06H is not had special requirement here.
(4)A13-Session Information Response
Source AN utilizes this message to send the relevant session layer information of terminal to target AN, and target AN utilizes these parameters to switch.Here, for realizing activated state direct-cut operation between AN, between PCF, need to increase the required parameter of switching.
Former A13-Session Information Response message definition is as follows:
| Information unit | Direction of transfer | Type | |
| A13Message Type | Former side is to target side | M | |
| UATI 128 | Former side is to target side | O | R |
| Mobile Identity(MN ID) | Former side is to target side | O | R |
| PDSN IP Address | Former side is to target side | O | R |
| Access Network Identifiers | Former side is to target side | O | R |
| Session Status Information Record | Former side is to target side | O | R |
Table 5
Suggestion increases following parameter:
| Sector ID (target) | Former side is to target side | O | R |
| Target Channel Info | Former side is to target side | O | R |
| Service Option | Former side is to target side | O | R |
| Quality of Service Parameters | Former side is to target side | O | R |
| Security Layer Packet | Former side is to target side | O | R |
| Anchor PDSN Address | Former side is to target side | O | C |
| Anchor P-P Address | Former side is to target side | O | C |
| AI Version | Former side is to target side | O | R |
Table 6
Each meaning of parameters is as follows:
Sector ID: the sector ID of target side.
Target Channel Info: Target cell pilot tone and pilot strength information.
Service Option: the type of service of current data business.
Quality of Service Parameters: the QoS parameter of current data business.
Anchor PDSN Address: the former network PDSN IP address that participates in switching.
Anchor P-P Address: the former BlueDrama state information record that participates in switching.
AI Version: the air interface version of former AN.
Above-mentioned message definition is based on existing A13 interface message, existing A13 interface message is expanded, to support the activated state direct-cut operation, at the above-mentioned message structure of having expanded, also can not change the standard message of existing A13 interface, redefine at the required new information of activated state direct-cut operation.
In a word, the above is preferred embodiment of the present invention only, is not to be used to limit protection scope of the present invention.
Claims (10)
1, a kind of method that in high-speed grouped data system, realizes the activated state direct-cut operation, the user terminal A T that is applied to carry out the activated state data service from source Access Network AN to the process that target AN moves, and the PCF under target AN and the source AN is identical, it is characterized in that this method may further comprise the steps:
A. after target AN receives the handoff request message of AT transmission, from the AN of source, obtain the session layer information relevant with this AT, and according to setting up A8, A9 link between described session layer information and the PCF;
B. target AN will be sent to source AN for the traffic channel information of this AT assignment, source AN stop and PCF between the A9 link transmission, and described traffic channel information sent to AT, AT sets up Traffic Channel with target AN and is connected;
C. target AN is that AT distributes a unique customer temporary identity sign UATI, and this UATI is sent to AT, the A9 link between target AN activation and the PCF;
D.AT sets up the PPP service link by target AN, and activates the grouped data connection by target AN;
E. target AN sends and handoffs completion message to source AN, A8, A9 link between source AN release and the PCF.
2, method according to claim 1 is characterized in that, step a comprises:
After a1, target AN receive the handoff request message that AT sends, send Information Request, return the session related news of current AT with request source AN to source AN;
After a2, source AN received this conversation request message, the session layer information relevant with AT that self is saved in sent to target AN by session information response message;
After a3, target AN receive session information response message, set up A8, A9 connection request to the PCF transmission;
A4, PCF set up A8, A9 link after receiving and setting up A8, A9 connection request, and send A8, A9 response message to target AN.
3, method according to claim 2 is characterized in that, described Information Request sends by the A13 interface.
4, according to claim 2 or 3 described methods, it is characterized in that, in execution in step a1, further comprise: a11: source AN starts the timer TA13req that sets in advance,
Then in step a3, if target AN does not receive session information response message before timer TA13req is overtime, then return step a1, or jump out this flow process.
5, method according to claim 2 is characterized in that, step b comprises:
B1, described Traffic Channel Assignment information are to send to source AN by the session information acknowledge message;
After b2, source AN receive the session information acknowledge message of target AN transmission, send A9ALDisconnected message, and start timer TA1d9 to PCF;
B3, PCF stop the A9 link after receiving the A9AL Disconnected message of source AN, and return A9AL Disconnected Ack message;
B4, source AN send Traffic Channel Assignment message to AT according to the Traffic Channel Assignment information of the target AN assignment that comprises in the session information acknowledge message;
B5, AT receive Traffic Channel Assignment message, and set up Traffic Channel between target AN and are connected, and after connecting, the feedback Traffic Channel is finished message to target AN.
6, method according to claim 5 is characterized in that, the AN of target described in the step b fails correctly to receive the A13 session information response message that source AN sends, and then feeds back A13 session information refuse information to source AN, and this flow process finishes.
7, method according to claim 2 is characterized in that, step c comprises:
C11, target AN send the UATI assignment message to AT, for AT distributes a new UATI;
After c12, AT receive, return target AN UATI assignment and finish message;
C13, target AN are by the A9 link between A9AL Connected message activation and PCF, and startup timer TAlc9;
C14, PCF feedback A9AL Connected Ack message is to target AN.
8, method according to claim 2 is characterized in that, step e comprises:
E11, target AN send A13 session information acknowledge message to source AN, notification source AN handover success.If the aforesaid operations failure, target AN feeds back handoff failure by A13 session information refuse information;
After e12, source AN receive target AN handover success message, send A9-Release-A8 message, and start timer TAre19, discharge A8, A9 link;
After e13, PCF receive the A9-Release-A8 message of source AN, discharge A8, A9 link.
9, a kind of method that in high-speed grouped data system, realizes the activated state direct-cut operation, the AT that is applied to carry out the activated state data service just from source AN to the process that target AN moves, and the PCF under target AN and the source AN is inequality, it is characterized in that this method may further comprise the steps:
A. after target AN receives the handoff request message of AT transmission, from the AN of source, obtain the session layer information relevant with this AT, and according to setting up A8, A9 link between described session layer information and the target P CF;
B. target AN will be sent to source AN for the traffic channel information of this AT assignment, source AN stop and source PCF between the A9 link transmission, and described traffic channel information sent to AT, AT sets up Traffic Channel with target AN and is connected;
C. target AN is that AT distributes a unique customer temporary identity sign UATI, and this UATI is sent to AT, the A9 link between target AN activation and the target P CF, and the A11 link switchover between handover source PCF and the PDSN is between target P CF and the PDSN;
D.AT sets up the PPP service link by target AN, and activates the grouped data connection by target AN;
E. target AN sends and handoffs completion message to source AN, A8, A9 link between source AN release and the source PCF.
10, method according to claim 9 is characterized in that, step C comprises:
C21, target AN send the UATI assignment message to AT, for AT distributes a new UATI;
After C22, AT receive, return target AN UATI and finish message;
C23, target AN are by the A9 link between A9-AL Connected message activation and PCF, and startup timer TAlc9;
C24, target P CF register a new A11 link by A11-Registration Request message between target P CF and PDSN, the address of PDSN is the PDSN IP address of carrying in the A13 session information response message here, and start timer TregReq;
C25, PDSN receive the A11 connection request, send A11-Registration Reply message to target P CF, and termination timing device TregReq;
C26, PCF feedback A9AL-Connected Ack message is to target AN, and termination timing device TAlc9.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2009067946A1 (en) * | 2007-11-26 | 2009-06-04 | Huawei Technologies Co., Ltd. | A method, system and device for switching between wireless communication network systems |
| WO2012103842A2 (en) * | 2012-03-29 | 2012-08-09 | 华为技术有限公司 | Method and base station controller thereof for sending channel assignment message |
| CN101711047B (en) * | 2009-12-15 | 2013-01-02 | 华为终端有限公司 | Hard handover (HHO) method and device for data service |
| CN105900483A (en) * | 2014-01-03 | 2016-08-24 | 高通股份有限公司 | Apparatus and method for avoiding data loss following an inter-pdsn handoff based on a simple ip network |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6834050B1 (en) * | 2000-03-10 | 2004-12-21 | Telefonaktiebolaget Lm Ericsson (Publ) | Packet core function and method of selecting a packet data service node/foreign agent in a packet data network |
| US7843878B2 (en) * | 2000-12-04 | 2010-11-30 | Ericsson Ab | Method and apparatus to control handoff between different wireless systems |
| US7085251B2 (en) * | 2002-11-04 | 2006-08-01 | Qualcom Incorporated | Method and apparatus for handoff of a wireless packet data services connection |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2009067946A1 (en) * | 2007-11-26 | 2009-06-04 | Huawei Technologies Co., Ltd. | A method, system and device for switching between wireless communication network systems |
| CN101711047B (en) * | 2009-12-15 | 2013-01-02 | 华为终端有限公司 | Hard handover (HHO) method and device for data service |
| WO2012103842A2 (en) * | 2012-03-29 | 2012-08-09 | 华为技术有限公司 | Method and base station controller thereof for sending channel assignment message |
| WO2012103842A3 (en) * | 2012-03-29 | 2012-09-27 | 华为技术有限公司 | Method and base station controller thereof for sending channel assignment message |
| CN102742324A (en) * | 2012-03-29 | 2012-10-17 | 华为技术有限公司 | Method and base station controller thereof for sending channel assignment message |
| CN102742324B (en) * | 2012-03-29 | 2015-01-21 | 华为技术有限公司 | Method and base station controller thereof for sending channel assignment message |
| CN105900483A (en) * | 2014-01-03 | 2016-08-24 | 高通股份有限公司 | Apparatus and method for avoiding data loss following an inter-pdsn handoff based on a simple ip network |
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