CN101193440A

CN101193440A - Method, system and device for identifying forward mode of packet data in switch

Info

Publication number: CN101193440A
Application number: CNA2006101609281A
Authority: CN
Inventors: 李志明; 钟鑫; 黄龙贵
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2006-12-01
Filing date: 2006-12-01
Publication date: 2008-06-04

Abstract

The invention discloses a method, a system and a device for ensuring a forwarding mode of grouped data in a switching process, wherein, the method comprises the processes: when an accessing terminal AT is in switching, a source accessing network S-AN of the AT sends a message carrying a piece of switching mode information and a building mode of the AT supporting routing information to a target accessing network T-AN of the AT; the T-AN ensures the mode of grouped data transmission for the AT according to the switching mode information carried by the message and the building mode of the AT supporting routing information, and informs a grouping data network side with the mode. The grouping data network side transmits grouping data for the AT by adopting the mode. The method, the system and the device provided by the invention can reduce the transmission interval of grouping data, ensure QoS quality of the grouping data service in real time when the AT carries out switching.

Description

In handoff procedure, determine the method, system and device of grouped data pass-through mode

Technical field

The present invention relates to the handoff technique in the wireless communication system, particularly a kind of method, system and device of in handoff procedure, determining the grouped data pass-through mode.

Background technology

In wireless communication system, in code division multiple access (CDMA) 2000 systems, comprise CDMA20001x system and HRPD (high rate packet data) (HRPD, High Rate Packet Data) system, CDMA 1x system can provide the data rate up to 153.6kbps, the HRPD system can provide the data rate up to 2.4Mbps, all can carry out video request program, grouping such as network gaming and high-speed data download data service, the mobile management that how to carry out grouped data in CDMA 20001x system or HRPD system is very important, switching promptly how to carry out grouped data is very important, this can guarantee to access terminal (AT, Access Terminal) guarantees the continuity of institute's transmitting grouped data when mobile.

Fig. 1 is the CDMA2000 network packet territory of prior art or the structural representation of HRPD network, solid line is the transmission channel of loaded packet data among the figure, dotted line is the transmission channel of control signaling, AT is at Access Network/Packet Control Function (AN/PCF, Access Network/Packet Control Function) in the coverage, packet data serving node (PDSN, Packet Data Serving Node) by point-to-point protocol with the AT accessing group data network, as Internet protocol (IP) network, the grouped data that will transmit for AT provides next to jump route.PCF among the figure, PDSN, Internet and home agent (HA, Home Agent) all belong to packet data network.In the drawings, AN and PCF can also be independent entity.

When AT moves, just might occur as the switching of AT serving PDSN, be same PDSN if switch front and back for the AT serving PDSN, this switching is called as in the PDSN switches; If switching front and back is different PDSN for the AT serving PDSN, this switching is called as between PDSN switches.For switching in the PDSN, owing to not changing the IP access point, so only need to carry out the continuity that link switchover can be kept the AT transmitting grouped data.For switching between PDSN, because the IP access point changes, just can't keep the continuity of AT transmitting grouped data by simple link switchover this moment, and need otherwise keep the continuity of grouped data.

There is dual mode can realize switching between PDSN.

First kind of mode, as shown in Figure 2, Fig. 2 is the schematic diagram of the method one switched between existing techniques in realizing PDSN, at AT when the zone of source PDSN (S-PDSN) administration moves to target P DSN (T-PDSN), set up the P-P tunnel between S-PDSN and the T-PDSN, S-PDSN will be by source AN (S-AN) transmission the grouped data of AT send to T-PDSN by the P-P tunnel of setting up, by T-PDSN this grouped data and external network are carried out alternately.Like this, the IP access point of AT is maintained on the S-PDSN, can not change, guarantee the continuity of grouped data by the IP address of keeping AT.

But, this mode can cause moving to the AT of T-PDSN during transmitting grouped data, and the packet data transmission passage of S-PDSN and the P-P tunnel between S-PDSN and the T-PDSN exist simultaneously, increased the burden of S-PDSN, consumed S-PDSN the processing resource and and T-PDSN between link circuit resource.

The second way, is transferred to the grouped data of the AT of S-PDSN transmission on the T-PDSN and to be transmitted when the zone of S-PDSN administration moves to T-PDSN at AT, makes the IP access point of AT become T-PDSN.As shown in Figure 3, Fig. 3 is the schematic diagram of the method two that switches between existing techniques in realizing PDSN, whole handoff procedure divides for by three parts and forms, set up the direct P-P of S-PDSN and T-PDSN tunnel, context transfer and proxy-mobile IP, wherein P-P tunneling process and context transfer process can executed in parallel, and the proxy-mobile IP process is carried out after context transfer.After switching was finished fast, T-PDSN became the serving PDSN for AT, directly transmitted the grouped data of AT by T-AN.The P-P tunnel is used in fast handover procedures the grouped data of AT transmission being transmitted between PDSN, carry out after the context transfer process, AT will be in the session state transfer of S-AN to T-AN, T-AN becomes the end points of the packet data transmission of AT, when using PPP as data link layer, PPP end points just.The session status of AT comprises ppp state, mobility status, service quality (QoS) and charging state etc.Proxy-mobile IP is that T-PDSN replaces AT to register binding by mobile IP signaling to HA, is used for upgrading the route of the HA of AT to T-PDSN.

Switching mode between these two kinds of PDSN, its common ground is the P-P tunnel that all needs to set up between S-PDSN and the T-PDSN, S-PDSN transmits data by the P-P tunnel to T-PDSN.

At present, at the CDMA2000 system, basic evolvement network framework schematic diagram has also been proposed, as shown in Figure 4: wherein, control access point (CAP, Controlling Access Point) have AN and radio resource management function, the major function of AN is first hop router as AT, carries out mobile management, QoS support, bears the function of the former PDSN of part.And RRM comprises public resource management, private resource management, wireless session management, the session status of safeguarding AT and Radio Link Management etc.Local network anchor point (LNA, Local Network Anchor) provides layer three mobile management mode between the CAP, does not need the mobile IP signaling of eating dishes without rice or wine.

AT is when accessing group data network, and as IP network, effective in the scope of whole LNA by the address that CAP obtains, CAP registers binding with the address of AT and the address of CAP itself at LNA, so that data can correct route.So when AT switches, do not need to change the address between CAP.

In AT carries out PDSN, switch or PDSN between when switching, two kinds of methods can be arranged, below be example with the CDMA2000HRPD of non-evolution, describe.

First method, connection status direct-cut operation (Hard handoff)

The connection status direct-cut operation is meant that the AT that is in connection status switches to the process of T-AN from S-AN.Fig. 5 carries out the principle schematic of connection status direct-cut operation for prior art, is made of a plurality of sectors in the Active Set of AT, and one of them is a serving sector.AN is in charge of Active Set and keeps the state information of Active Set, the sector in the increase/deletion Active Set for example, maintenance service sector auxiliary information.Sector in the Active Set of AT can only belong to same AN.With Fig. 5 is example, comprises sector 1 and sector 2, and sector 1 and sector 2 all belong to S-AN, and session control point is at S-AN, and in the connection status direct-cut operation, S-AN is by the sector in the Traffic Channel Assignment information updating AT Active Set.For example, delete sector 1 and sector 2 and increase sector 3, sector 3 belongs to T-AN, and AT is connected to T-AN after upgrading Active Set, and simultaneously, the session control point of AT is also transferred to T-AN from S-AN.

In the connected state direct-cut operation between AN session information shift and stride the AN sector and switch and be closely related, that is to say that the sector that switches to other AN will cause session to transfer to other AN, the connected state direct-cut operation carries out with striding to switch between the AN sector to bundle.

Fig. 6 carries out the method flow diagram of connection status direct-cut operation for prior art, because the step that relates to is many, so only introduce committed step here:

The direct-cut operation of AT is initiated in the received signal quality that step 601, S-AN are measured according to AT and the strategy decision of setting to T-AN.

Step 602, S-AN send session handoff request message to T-AN, and this message is carried the session information of this AT.

After step 603, T-AN receive session handoff request message, session information according to the AT that carries is the AT distributing radio resource, create the protocol stack of the interface of eating dishes without rice or wine according to session information, after T-AN finishes these preparations, send the response message that session is shifted to S-AN.

Step 604, with step 603 simultaneously, T-AN sets up the A8 link to the T-PCF request, T-PCF sets up the A10 link to the T-PDSN request.

Step 605, S-AN send Traffic Channel Assignment message to AT after receiving the response message that session that T-AN sends shifts, and indication AT switches to the serving sector of T-AN.

Step 606, S-AN send the session handoff completion message to T-AN, receive the session handoff completion message after, T-AN replaces the session access point that S-AN becomes AT, is used to transmit the grouped data of AT.

Step 607, T-AN catch the signal of AT and carry out the link RLP reset operation of eating dishes without rice or wine.

Second method connects afterwards break (Make before Break) earlier and switches

This method is consistent with the result of connection status direct-cut operation, also is the session of AT is transferred to T-AN from S-AN.But the main distinction of itself and connection status direct-cut operation is the session transfer process and stride the process of switching the AN sector and do not bundle and carry out.Connect the switching of afterwards breaking earlier and only relate to AT session transfer process, and the process that switch the sector (comprising that striding the AN sector switches) is finished by cross bonding.The two is separate process, and can walk abreast and carry out.So S-AN formerly connects can be to AT transmitting channel Assignment Command in the disconnected switching in back.

The schematic diagram that cross bonding is finished was carried out in the sector during Fig. 7 switched for prior art connects formerly that the back is disconnected.Be made of a plurality of sectors in the Active Set of AT, one of them is a serving sector.AN is in charge of Active Set and keeps the state information of Active Set, the sector in the increase/deletion Active Set for example, maintenance service sector auxiliary information.Sector in the Active Set both can be the sector that belongs to S-AN, also can be the sector that belongs to other AN.This is to support cross bonding and do not support one of main distinction of cross bonding function.If belong to the sector of other AN, S-AN by and other AN between interface manage these sectors, as shown in the figure, sector 3 is the sectors that belong to T-AN.AT strides the AN handoff sectors, and for example the sector from figure 1 switches to sector 3, can not cause S-AN to shift session to T-AN.

Fig. 8 afterwards breaks for prior art connects earlier and switches in the schematic diagram that shifts session between AT.The first step enters the cross bonding state, and S-AN has joined sector 3 in the Active Set of AT (sector 3 is the sectors that belong to T-AN); Second step, S-AN initiation session transfer process, S-AN becomes control AN (Master AN), and T-AN becomes Be Controlled AN (Slave AN).Slave AN will be attached on each sector in the Active Set, for session is switched ready.The session control point of AT is still on S-AN at this moment; In the 3rd step, T-AN substitutes S-AN becomes the session control point, and the session transfer process is finished; In the 4th step, S-AN is to the sector attachment removal in the Active Set.

As can be seen from Figure 8, connect the switching of afterwards breaking earlier and only relate to the conversation shift process, switch irrelevant with the sector.Formerly connect in the disconnected handoff procedure that switches in back, the session control point of AT changes, and session control point switches the back on T-AN before and after switching on S-AN.

The method flow diagram that Fig. 9 afterwards breaks for prior art connects earlier and switches, because the step that relates to is many, so only introduce committed step here:

Step 901, S-AN connect the switching of afterwards breaking according to the strategy decision that sets in advance earlier to what T-AN initiated AT.

Step 902, S-AN send session handoff request message to T-AN, and this message is carried the information of each sector in the session information of AT and the Active Set, and S-AN promptly becomes Master AN, and T-AN promptly becomes Slave AN.

Step 903, T-AN are attached on each sector in the Active Set.

Step 904, T-AN set up the A8 link to the T-PCF request, and T-PCF sets up the A10 link to the T-PDSN request.

Step 905, T-AN send the response message that shifts session to S-AN.

Step 906, S-AN send the session handoff completion message to T-AN, receive the session handoff completion message after, T-AN becomes Master AN, and S-AN becomes Slave AN, T-AN replaces the session control point that S-AN becomes AT.

Step 907, S-AN are to each sector attachment removal in the Active Set.

No matter adopt the connection status direct-cut operation still to adopt and connect the switching of afterwards breaking earlier, after switching is finished, all set up AT and arrived the route of PDSN again to T-AN, AT is by this route transmission grouped data.In setting up process, also be divided into two kinds of methods, below respectively these two kinds of methods are introduced.

First method, a method for routing foundation.

On a route, comprise an AT and an AN, on AT and AN, respectively there is a radio link protocol (RLP) entity to be responsible for transmitting and receiving packet data, at transmitting terminal grouped data is divided into a plurality of packet data package, each packet data package is sequentially put on the RLP sequence number, grouped data is reconfigured according to the RLP grouping serial number that receives packet data package at receiving terminal.The continuity of the RLP sequence number of the packet data package that receives by inspection, receiving terminal can be judged and receive the packet data package of losing, and the indication transmitting terminal is retransmitted the packet data package that does not receive.

The session control point of RLP entity and AT is in an AN.When AT takes place to switch between AN, the RLP entity of T-AN will substitute the grouped data transmitting-receiving work of the RLP entity of S-AN.Its theory structure as shown in figure 10, the reseting procedure that the RLP entity of T-AN must startup RLP entity before the RLP entity that substitutes S-AN is started working.Reseting procedure makes transmitting terminal that the RLP sequence number of packet data package is put 0, empties retransmission packet data bag buffer area simultaneously; Reseting procedure makes receiving terminal that the RLP sequence number of receiving block data bag is also put 0, empties receiving block data bag buffer area simultaneously.Reseting procedure makes the transmitting-receiving of the RLP entity of RLP entity on the T-AN and AT be in synchronous regime, and is ready for restarting to transmit data.The RLP reseting procedure may cause losing of packet data package.When AT switches to T-AN, set up AT to the route that T-AN arrives PDSN again, carry out the transmission of packet data package.

This in handoff procedure the process of employed transmission packet data package be applicable to the connection status hard handover approach or connect the mode of afterwards breaking earlier.

If packet data network, support to connect earlier afterwards break switching mode and two routes simultaneously as CDMA2000 HRPD and send the mode of packet data package, and AT supports single route to send the mode of packet data package, then AT is in handoff procedure, the signaling process that adopts is for connecting the switching mode of afterwards breaking earlier, and the processing procedure of packet data streams is the mode that sends packet data package according to a route.

Second method, two method for routing foundation.

Two routes comprise route A and route B.Route A is made of AT and S-AN, and route B is made of AT and T-AN.A RLP-A entity is arranged on the S-AN, a RLP-B entity is arranged on the T-AN.A RLP-A entity and a RLP-B entity are respectively arranged on the AT.It is a pair of corresponding that RLP-A entity on the S-AN and RLP-A entity on the AT have constituted, and it is a pair of corresponding that the RLP-B entity on the T-AN and RLP-B entity on the AT have constituted, and two pairs of RLP entities are finished the forwarding of packet data package independently of each other.

Before shifting, the session control point of AT on S-AN, is in an AN together with the RLP-A entity; Shift the back on T-AN, with the RLP-B AN that exists together.The time point that the session control point of AT shifts might be before route be switched, also might be after route is switched.

The principle schematic of transmitting and receiving packet data method two in the process that Figure 11 switches between AN for AT in the prior art, common this method with connect the switching mode of afterwards breaking earlier and be used in combination.Route B is activated in advance, along with between T-AN and the T-PDSN the A10 link establishment, PDSN begins packet data package is sent to T-AN.T-AN sends to AT with packet data package on route B, AT switches to route B immediately, promptly receives the packet data package that sends by route B, sends packet data package by route B simultaneously.After AT switches to route B,, still can on route A, send to AT or PDSN and receive if S-AN also has remaining packet data package not send.After the packet data package transmission of S-AN buffer memory finished, S-AN can discharge the processing resource of former A10 link and route A.

In sum, in AT carries out handoff procedure between PDSN, not only to consider the switching (adopting signaling to realize) of the session control point of AT, and the grouped data that will consider AT wraps in the transmission in the handoff procedure, particularly for the real time packet data business, the grouped data of considering AT wraps in the transmission in the packet switch process, does not cause grouped data to wrap in losing in the handoff procedure, make the transmission intercal minimum, even more important.

Below the process that AT switch is described between PDSN for two complete examples.

Figure 12 is the signaling process figure that prior art CDMA2000 1x packet domain AT switches between PDSN fast, and in the present embodiment, AT is that mobile device (MS), AN are base station (BS), because it is more to relate to step, just introduces committed step here:

Step 1201, S-BS initiate the switching of AT by the notice T-BS of mobile switching centre (MSC).

Step 1202, T-BS set up the A8 link with T-PCF, and T-PCF sets up the A10 link with T-PDSN.

Step 1203, T-PDSN set up the P-P tunnel with anchor PDSN.

The packet data package that step 1204, anchor PDSN will send to AT, is also transmitted by the P-P tunnel packet data package of copy when S-BS transmits by S-PCF to T-PDSN.T-PDSN sends to T-PCF with the packet data package that receives, and T-PCF abandons the packet data package that receives immediately.

Step 1205, T-BS send handover request ack message to MSC.

Step 1206, MSC send switching command message to S-BS.

Step 1207, S-BS send the order that switches to T-BS by air interface to MS.

Step 1208, S-BS send A9-AL connection message notice MS to T-PCF and insert.

Step 1209, T-PCF stop to abandon the packet data package that receives, and the packet data package that receives is transmitted to T-BS.T-PCF sends the A11 login request message to T-PDSN, and T-PDSN returns the register requirement response message.

Step 1210, T-PDSN send the P-P login request message to anchor PDSN, and anchor PDSN returns the P-P registration reply message to T-PDSN.

Step 1211, anchor PDSN trigger S-PCF release A10 link between the two.

Step 1212, MSC trigger S-BS release A8 link between the two.

Step 1213, anchor PDSN stop to S-PCF forwarding packet data bag, and only to T-PDSN forwarding packet data bag, packet data package is by anchor PDSN, and T-PDSN, T-PCF, T-BS arrive MS.

As can be seen from Figure 12, carry out in the handoff procedure of PDSN, transmit the packet data package of AT simultaneously by S-PDSN and T-PDSN simultaneously, promptly adopt two modes of sending out, like this, can guarantee the transmission intercal minimum of real time packet data business at AT.But, caused the network processes wasting of resources because identical grouped data is transmitted by S-PDSN/S-PCF and T-PDSN/T-PCF simultaneously.Especially for the non real-time Packet data service,, there is no need its grouped data is carried out two sending out because it is insensitive to transmission intercal.

The signaling process figure of Figure 13 for switching fast between the PDSN that triggers because of direct-cut operation in the prior art HRPD system, comprise two kinds of situations in this case, a kind of is to non-real-time service, before initiating direct-cut operation, make S-PDSN suspend the forwarding packet data bag for this situation S-AN by triggering flow-control command, make packet data package by the PDSN buffer memory, after direct-cut operation is finished, continue again to transmit.Another kind does not trigger flow-control command to real time business for this situation before direct-cut operation.Below only the committed step of second kind of situation is introduced.

The direct-cut operation to T-AN is initiated in the received signal quality decision that step 1301, S-AN measure according to AT.

Step 1302, S-AN send A9-AL to S-PCF and disconnect connection message, and S-PCF sends flow-control command to S-PDSN, and notice S-PDSN stops to S-PCF forwarding packet data bag, and this step can be selected to carry out.

Step 1303, S-AN send A16 session handoff request message to T-AN, and this message is carried the session information of AT.

Step 1304, T-AN are the AT distributing radio resource after receiving conversation request message, after session information establishment air interface protocols, send the response message that shifts session to S-AN.

Step 1305, T-AN set up the A8 link to the T-PCF request, and T-PCF sets up the A10 link to the T-PDSN request, and T-PDSN sets up the P-P tunnel to the S-PDSN request., after setting up successfully, the P-P tunnel stops immediately packet data package being forwarded to T-PDSN at S-PDSN to S-PCF forwarding packet data bag.T-PDSN is forwarded to T-PCF with the packet data package that receives, and T-PCF is to T-AN forwarding packet data bag, may this moment AT also be not connected on the T-AN, so T-AN is with the packet data package temporary cache that receives or abandon.

Step 1306, S-AN send Traffic Channel Assignment message to AT after receiving the transfer conversational response message of T-AN transmission, and indication AT switches to the serving sector of T-AN.Meanwhile, the RLP entity of S-AN sends reset message and gives AT, starts the reseting procedure of RLP.

Step 1307, S-AN send the session handoff completion message to T-AN, receive the session handoff completion message after, T-AN replaces the session control point that S-AN becomes AT.

Step 1308, T-AN catch the AT signal.If the RLP entity of T-AN does not receive the response message that resets of AT, the RLP entity of T-AN will be initiated RLP entity resets process.

Step 1309, T-AN send the A9-AL connection message to T-PCF.

Step 1310, T-PCF send the A11 login request message to T-PDSN after receiving the A9-AL connection message.

After step 1311, T-PDSN receive the A11 login request message, send the A11 registration reply message to T-PCF, T-PCF sends the A9-AL connection response message to T-AN after receiving the A11 registration reply message.

As can be seen from Figure 13, for real time business, S-PDSN is when beginning to T-PDSN forwarding packet data bag, and T-PDSN is forwarded to T-AN with packet data package by T-PCF.Because might also not be connected on the T-AN by AT this moment, so T-AN may or abandon the packet data package temporary cache that receives.After a period of time, when AT was connected to T-AN, T-AN sent to AT with the packet data package that receives again.During this period of time, for AT, there is a break time in the forwarding of packet data package.Can cause the QoS of real time business to descend like this, for example cause voice jitter or voice to be interrupted.

Being used in combination of the mode of setting up that connects the switching mode of afterwards breaking and two routes earlier, solved fully switch in the packet loss problem, make that the packet data transmission of AT is also lower at interval.For connecting the switching mode of afterwards the breaking situation that combines with the mode of setting up of two routes earlier, S-PDSN adopts the single-shot mode to get final product in handoff procedure.But can not get rid of the non-situation that combines of afterwards breaking that connects earlier with the mode of setting up of two routes: the one, AT can not support the mode of setting up of two routes.The 2nd, can only carry out connected state direct-cut operation (such as T-AN does not support cross bonding) under some situation between the AN.Under back two kinds of situations,,, reduce the QoS quality of real time packet data if the mode of S-PDSN employing single-shot in the handoff procedure may cause tangible packet data transmission at interval for the real time packet data business of AT.For the non real-time Packet data service, if S-PDSN adopts two modes of sending out will cause the waste of network processes resource in the handoff procedure.

Summary of the invention

The embodiment of the invention provides a kind of method of determining the grouped data pass-through mode in handoff procedure, this method can be when AT switches, reduce packet data transmission at interval, guarantee the QoS quality of real time packet data business, at utmost reduce the processing consumption of unnecessary network simultaneously.

The embodiment of the invention also provides a kind of system that determines the grouped data pass-through mode in handoff procedure, this system can be when AT switches, reduce packet data transmission at interval, guarantee the QoS quality of real time packet data business, at utmost reduce the processing consumption of unnecessary network simultaneously.

The embodiment of the invention also provides a kind of device of determining the grouped data pass-through mode in handoff procedure, this device can be when AT switches, reduce packet data transmission at interval, guarantee the QoS quality of real time packet data business, at utmost reduce the processing consumption of unnecessary network simultaneously.

According to above-mentioned purpose, the technical scheme of the embodiment of the invention is achieved in that

A kind of method of determining the grouped data pass-through mode in handoff procedure is characterized in that this method comprises:

Access terminal AT is when switching, and the source access network S-AN of AT sends to the target access network T-AN of AT and carries switching mode information and AT supports route to set up the message of mode information;

Switching mode information and AT that T-AN carries according to this message support route to set up mode information, are defined as the mode of AT transmitting grouped data, and with this mode notice packet data network side, it is the AT transmitting grouped data that the packet data network side adopts this mode.

A kind of system that in handoff procedure, determines the grouped data pass-through mode, this system comprises: AT, AN and packet data network side, wherein,

The S-AN of AT sends the message of the routing mode information of carrying switching mode information and AT support to T-AN, the information that T-AN carries according to the message that receives is determined the mode of the grouped data of transmission AT, notify this mode to the packet data network side, the packet data network lateral root transmits the grouped data of AT according to the mode of this notice.

A kind of device of determining the grouped data pass-through mode in handoff procedure comprises determining unit, receiving element and transmitting element, wherein,

Receiving element is used to receive the message of the routing mode information that the switching mode information of carrying that AT sends and AT support, the routing mode information that the switching mode information of carrying and AT are supported sends in the determining unit;

Determining unit, the definite mode of transmitting the grouped data of AT of routing mode information according to switching mode information that receives from receiving element and AT support sends to transmitting element with this mode information;

Transmitting element carries this mode notification of information according to this mode information that receives from determining unit to the transmission of packet data network side, and the notice packet data network side adopts this mode to transmit the grouped data of AT.

From such scheme as can be seen, the method that the embodiment of the invention provides, in system and the device, the access network that AT switches to supports the mode of route foundation to determine that the packet data network side is the mode and the notice packet data network side of AT transmitting grouped data according to switching mode and AT, the packet data network lateral root is the AT transmitting grouped data according to the mode of determining, and unlike prior art, provided a kind of mode of AT transmitting grouped data that is that adopts, therefore can be when AT switches, at utmost reduce the professional transmission intercal of real time packet data, guarantee the QoS quality of real time packet data business, at utmost reduce the processing consumption of unnecessary network simultaneously.

Description of drawings

Fig. 1 is the CDMA2000 network packet territory of prior art or the structural representation of HRPD network;

Fig. 2 is the schematic diagram of the method one switched between existing techniques in realizing PDSN;

Fig. 3 is the schematic diagram of the method two that switches between existing techniques in realizing PDSN;

Fig. 4 is the basic evolvement network framework schematic diagram of prior art cdma system;

Fig. 5 carries out the principle schematic of connection status direct-cut operation for prior art;

Fig. 6 carries out the method flow diagram of connection status direct-cut operation for prior art;

The schematic diagram that cross bonding is finished was carried out in the sector during Fig. 7 switched for prior art connects formerly that the back is disconnected;

Fig. 8 is that prior art connects the schematic diagram that shifts session in the switching of afterwards breaking between AT earlier;

The method flow diagram that Fig. 9 afterwards breaks for prior art connects earlier and switches;

Figure 10 is the principle schematic of transmitting and receiving packet data method one in the process that AT switches between AN in the prior art;

Figure 11 is the principle schematic of transmitting and receiving packet data method two in the process that AT switches between AN in the prior art;

Figure 12 is the signaling process figure that switches fast between prior art CDMA20001x packet domain PDSN;

The signaling process figure of Figure 13 for switching fast between the PDSN that triggers because of direct-cut operation in the prior art HRPD system;

Figure 14 is the embodiment of the invention is determined packet data network side pass-through mode in handoff procedure a method flow diagram;

Figure 15 determines the method flow diagram of packet data network side pass-through mode in handoff procedure for preferred embodiment one of the present invention;

Figure 16 carries the structural representation of the A9-Setup-A8 message of Data Forwarding Type for the embodiment of the invention;

Figure 17 is the embodiment of the invention two is determined packet data network side pass-through mode in handoff procedure a method flow diagram;

Figure 18 determines the method flow diagram of packet data network side pass-through mode in handoff procedure for preferred embodiment three of the present invention;

Figure 19 carries the structural representation of the A9-Setup-A8 message of Data Forwarding Type for the embodiment of the invention three;

Figure 20 determines the method flow diagram of packet data network side pass-through mode in handoff procedure for preferred embodiment four of the present invention;

Figure 21 is the Data Forwarding the type field schematic diagram in the embodiment of the invention;

Figure 22 is professional structural representation that connects the send mode that is adopted of the indication in the Data Forwarding the type field of the present invention;

Figure 23 determines the system schematic of packet data network side pass-through mode in handoff procedure for the present invention;

Figure 24 determines the device schematic diagram of packet data network side pass-through mode in handoff procedure for the present invention.

Embodiment

Below lift specific embodiment and with reference to accompanying drawing, further detailed explanation.

From prior art as can be seen, adopt (switching between PDSN) when connecting the switching mode of afterwards breaking earlier for AT, the mode of S-PDSN forwarding packet data depends on that the route that AT supports sets up mode.

Set up the AT of mode for supporting two routes, as shown in figure 10, have two routes in handoff procedure, S-PDSN can stop the packet data package to S-PCF transmission AT immediately after setting up the P-P tunnel with T-PDSN, and by the packet data package of P-P tunnel to T-PDSN transmission AT.Because AT can pass through two route transmitting and receiving packet data bags simultaneously, so can not cause the losing of packet data package of AT, at this moment can adopt the single-shot mode to transmit the packet data package of AT, like this, also can reduce the network processes wasting of resources.

For supporting a route to set up the AT of mode, S-PDSN should adopt two sending out after setting up the P-P tunnel with T-PDSN.On the one hand, S-PDSN sends the packet data package of AT to S-PCF and S-AN, and on the other hand, S-PDSN transmits by the P-P tunnel copy of the packet data package of AT to T-PDSN.T-PDSN then mails to T-PCF with the packet data package of the AT that receives, and T-PCF abandons the packet data package of the AT that receives.AT continues by S-AN transmitting and receiving packet data bag, after T-AN becomes session control point, and T-AN initiates reseting procedure, and T-AN notifies T-PCF.T-PCF receives the packet data package that stops to abandon the AT that receives after the notice, and the packet data package of AT is sent to AT by T-AN.Owing to before the T-AN reseting procedure is finished, the packet data package that S-AN continues to transmit AT is to AT, and after the T-AN reseting procedure was finished, T-AN began to transmit the packet data package of AT, and the packet data package of AT just can not be interrupted or shortening break period like this.If adopt the single-shot mode, set up the P-P tunnel from T-PDSN and S-PDSN so after, transfer to T-AN to the session control point from S-AN before, T-AN can't be transmitted to AT with the packet data package of AT, causes the packet data package interruptions in transmissions of AT.

Switch when adopting the connected state hard handover approach (switch instances between PDSN) for AT, no matter AT supports is single channel by setting up mode or double route is set up mode, the best way of the packet data package of transmission AT is two sending out, because even packet data network side and AT support the double route mode, can in direct-cut operation, not activate two routes being set up simultaneously yet.

As can be seen from the above analysis, under different situations, which kind of mode is the packet data network side adopt transmit the packet data package of AT, and to guarantee the interval minimum of AT packet data transmission in handoff procedure, the network processes resource consumption is minimum, is different.Adopt when connecting the switching mode of afterwards breaking earlier and two routes of AT support when setting up for AT, the mode of employing is that single-shot is best; Adopt when connecting the switching mode of afterwards break earlier and route of AT support when setting up for AT, the mode of employing is pair to send out best; When adopting the connected state direct-cut operation for AT, no matter whether AT supports any route to set up, and the mode of employing be pair to send out best.

Therefore, the core concept of the embodiment of the invention is the access network that AT switches to, be that T-AN supports the mode of route foundation to determine that the packet data network side is the mode and the notice packet data network side of AT transmitting grouped data according to switching mode and AT, the packet data network lateral root is the AT transmitting grouped data according to the mode of determining.

Figure 14 is the embodiment of the invention is determined packet data network side pass-through mode in handoff procedure a method flow diagram, and its concrete steps are:

The S-AN of step 1401, AT sends session handoff request message to T-AN, and this message is carried the routing mode information of switching mode information and AT support.

The information that step 1402, T-AN are carried according to the session handoff request message that receives is determined this switching mode whether for connecting the switching mode of afterwards breaking earlier, if, execution in step 1403; If not, execution in step 1405.

The information that step 1403, T-AN are carried according to the session handoff request message that receives determines that routing mode that AT supports is that to set up mode still be that a route is set up mode to two routes, if the former, execution in step 1404, if the latter, execution in step 1405.

Step 1404, T-AN determine that the packet data network side is that the mode of AT transmitting grouped data is the single-shot mode, and the notice packet data network side is AT transmitting grouped data bag in the AT handoff procedure according to the single-shot mode.

Step 1405, T-AN determine that the packet data network side is that the mode of AT transmitting grouped data is two originating party formulas, and the notice packet data network side is AT transmitting grouped data bag in the AT handoff procedure according to two originating party formulas.

In the HRPD system, AT is connected by a main business with data between the PDSN and zero or a plurality of auxiliary activities connect carry.In embodiments of the present invention, pass-through mode can connect with all auxiliary activities at main business and be connected the grouped data (all grouped datas that are AT adopt a kind of forwarding mechanism) that institute is carried, also can be at each professional grouped data (being a kind of forwarding mechanism of each professional connection employing) of being carried that connects.

Under second kind of situation, the embodiment of the invention can further include following scheme.

Because packet data transmission influence at interval is bigger to the real time packet data business, and it is smaller for the influence of non real-time Packet data service, so before the step 1405 in Figure 14, further determining step: this business link information (this business connects the QoS attribute of included IP stream) according to carrying AT transmitting grouped data judges whether it is to belong to the real time packet data business, if then execution in step 1405; If not, execution in step 1404 then.Like this, for the non real-time Packet data service, just can not adopt two originating party formulas is the AT transmitting grouped data, reduces the resource of the packet data network that consumes.

Certainly, also can be before step 1401, increase step judgement: this business link information (this business connects the QoS attribute of included IP stream) according to carrying AT transmitting grouped data judges whether it is to belong to the non real-time Packet data service, if then adopting the single-shot mode is the AT transmitting grouped data; Otherwise, execution in step 1401.

In embodiments of the present invention, also can unlike Figure 14, judge, and directly read the information that session handoff request message is carried, determine that adopting which kind of mode is AT transmitting grouped data bag in the AT handoff procedure.

Below process that all grouped datas that AT transmitted are transmitted adopt two embodiment to be specifically described, all grouped datas that AT transmitted are transmitted be not meant not connect all grouped datas that AT transmitted are distinguished, transmit with a kind of transmission means but adopt according to business.

Figure 15 determines the method flow diagram of packet data network side pass-through mode for preferred embodiment one of the present invention in handoff procedure, in this embodiment, employing be switching between PDSN, its concrete steps are:

The S-AN of step 1501, AT sends session handoff request message to T-AN, and this message is carried the routing mode information of switching mode information and AT support.

In embodiments of the present invention, session handoff request message can be the A16-SessionTransfer Request message of prior art, wherein also carries the session state information record (SSIR, SessionState Information Record) of AT.

Because for different switching modes, the information difference that prior art A16-Session Request message is carried, the connection status hard handover approach with connect the switching mode maximum of afterwards break earlier and distinguish and be: connect the switching mode of afterwards breaking earlier and in prior art A16-Session Transfer Request message, carry serving sector information and sector terminal point information, so in embodiments of the present invention, whether carry serving sector information and the sector terminal point information just can be determined switching mode according to this message.

In embodiments of the present invention, the route that can determine the AT support by the SSIR that this message is carried is set up mode.SSIR is eat dishes without rice or wine the configuration attribute information of each agreement and the set of state information.In the configuration attribute information of default stream agreement, defined the property value of the pairing application in four tributaries.Wherein the grouping of a tributary correspondence " with Packet Data Network's binding " is used.AT and AN use this grouping application transport grouped data.Just can judge AT according to the property value in this tributary supports a route to set up or support the foundation of two routes.For example this property value is 0x0002, represents default grouping to use, and then AT supports the mode that a route is set up.For example this property value is 0x0005, represents the multithread grouping to use, and then AT supports the mode that a route is set up.For example this property value is 0x0009, and representative strengthens the multithread grouping uses, and then AT supports two routes to set up.

Step 1502, T-AN are defined as the mode of AT transmitting grouped data according to receiving routing mode information that switching mode information that this message carries and AT support, T-AN sends the A9-Setup-A8 message of the mode information of carrying promising AT transmitting grouped data to T-PCF, set up with T-PCF between A8 be connected, simultaneously, T-AN starts regularly phase T _A8-setup

If it is the connection status hard handover approach that T-AN receives the switching mode information that this message carries, the mode that then is defined as the AT transmitting grouped data is two originating party formulas.

If T-AN receives switching mode information that this message carries for connecting the mode of afterwards breaking earlier, judge then whether the routing mode information that this message is carried is the foundation that AT supports two routes, if, the mode that then is defined as the AT transmitting grouped data is the single-shot mode, if not, the mode that then is defined as the AT transmitting grouped data is two originating party formulas.

In the present embodiment, in the reserved field in existing A9-Setup-A8 message, increase a field Data Forwarding Type, its form as shown in figure 16, this field is used to carry the mode information into the AT transmitting grouped data.In this field, be set to 0 expression single-shot mode, be set to 1 and be expressed as two originating party formulas.

In the present embodiment, can also revise A9 indication (A9Indicators) field in the A9-Setup-A8 message, to wherein certain keep the position, as the 2nd bit, as Data ForwardingType, in this field, be set to 0 expression single-shot mode, be set to 1 and be expressed as two originating party formulas.

After step 1503, T-PCF receive A9-Setup-A8 message, send A11-Registration Request message, set up main A10 connection and be connected (if existing auxiliary A10 to connect) with all auxiliary A10 to T-PDSN.T-PCF starts timer Tregreq simultaneously.

In the present embodiment, T-PCF can also save as the mode information of AT transmitting grouped data.

In the present embodiment, if the Data Forwarding Type that A9-Setup-A8 message is carried is set to 0, then the S position is set to 0 (the single-shot mode is adopted in expression) in the Flag field in the A11 login request message; If the Data Forwarding Type that A9-Setup-A8 message is carried is set to 1, then the S position is set to 1 (two originating party formulas are adopted in expression) in the Flag field in the A11 login request message.

After step 1504, T-PDSN receive the A11 login request message, by the P-P login request message is that AT foundation is connected with the P-P of S-PDSN, this message is carried the mode information into the AT transmitting grouped data, after P-P sets up and finishes, S-PDSN just transmits the grouped data of transmitting for AT according to the mode that is the AT transmitting grouped data to T-PDSN, and T-PDSN will be transmitted to T-PCF for the grouped data of AT transmission again.

In the present embodiment, carry the Flag field in the P-P login request message, the S position of this field be provided with the A11 login request message in identical, S-PDSN just can determine to the mode of AT transmitting grouped data according to this field: if the P-P login request message that receives is carried the S position of Flag field is 1, then S-PDSN continues to transmit the grouped data of transmitting for AT by S-PCF, and S-PDSN passes through to set up the grouped data of transmitting for AT is transmitted in copy from good P-P connection to T-PDSN simultaneously; If it is 0 that the P-P login request message that receives is carried the S position of Flag field, then S-PDSN stops to transmit the grouped data of transmitting for AT to S-PCF, and will transmit to T-PDSN by setting up good P-P connection for the grouped data of AT transmission.

Step 1505, T-PDSN send the A11 registration reply message to T-PCF, and T-PCF stops timer T after receiving this response message _Regreq

In this has been implemented, if at timer T _RegreqAfter overtime, T-PCF does not still receive the A11 registration reply message, and then the T-PCF repeated execution of steps 1503, or sends A9-releasing connection A8 message to T-AN, finishes this handoff procedure.Therefore, timer T _RegreqSetting be can normally carry out for the switching that guarantees this AT.

Step 1506, T-PCF send A9 to T-AN and connect A8 message, and T-AN stops timer T after receiving this message _A8-setup

In the present embodiment, if at timer T _A8-setupThen, T-AN does not still receive A9 and connects A8 message, and then the T-AN repeated execution of steps 1502, or sends A16 session switching response message refusal session switching to S-AN, perhaps sends this handoff procedure of the A16 session stop end of message to S-AN.Therefore, timer T _A8-setupSetting be can normally carry out for the switching that guarantees this AT.

Step 1507, T-PCF are according to handle the grouped data of transmitting from T-PDSN for the AT transmission for the mode of AT transmitting grouped data.

In the present embodiment, if be that the mode of AT transmitting grouped data is two originating party formulas, then T-PCF abandons the grouped data of transmitting for AT that receives, up to step 1509; If for the mode of AT transmitting grouped data is the single-shot mode, then the T-PCF grouped data for AT transmission that will receive is transmitted to T-AN.

If what step 1508 S-AN initiated is the connection status hard handover approach, then T-AN sends the A9-AL connection message to T-PCF after catching the AT signal and finishing the RLP reseting procedure, and T-AN starts timer T simultaneously _Alc9If S-AN initiates is to connect the switching mode and AT supported is that a route is set up mode of afterwards breaking earlier, then T-AN starts the RLP reseting procedure behind the A16 session handoff completion message that receives the S-AN transmission, T-AN sends the A9-AL connection message to T-PCF subsequently, and T-AN starts timer T simultaneously _Alc9If S-AN initiates is to connect the switching mode and AT supported is that two routes are set up mode of afterwards break earlier, and then T-AN need not start the RLP reseting procedure behind the A16 session handoff completion message that receives the S-AN transmission, getting final product according to the prior art processing.

In the present embodiment, in the S-AN initiation is to connect the switching mode of afterwards breaking earlier, T-AN can not send the A9-AL connection message to T-PCF in the prior art after the session transfer is finished, this be because, this message is used for indicating direct-cut operation AT to obtain the incident of the Traffic Channel of transmitting grouped data, do not bind and connect the switching mode process of afterwards breaking earlier, therefore can not trigger this message with the sector handover event.But in embodiments of the present invention, what initiate at S-AN is to connect earlier when afterwards break switching mode, uses this message as notifying T-PCF to begin to the trigger condition of T-AN forwarding as the AT transmitting grouped data.

Step 1509, T-PCF send the A9-AL connection response message to T-AN, and T-AN stops timer T after receiving this message _Alc9, T-PCF transmits grouped data for the AT transmission according to the mode that be the AT transmitting grouped data to T-AN: if two originating party formula, and the T-PCF grouped data that stops to abandon the grouped data of transmitting for AT that receives and begin to transmit for AT then to the T-AN forwarding.

In the method that the embodiment of the invention provides, also can be applied in the AT that switches in the PDSN, at this moment, in packet data network, the S-PDSN of AT and T-PDSN are same PDSN, T-PCF is when notice PDSN, as long as notice is the mode of AT transmitting grouped data, PDSN carries out two sending out or single-shot according to this mode.

Be described in detail process that the embodiment of the invention is applied to switch between CAP, similarly at the framework of evolvement network below, T-CAP can set up mode according to the switching mode of AT and the route that AT supports and notify LNA to adopt different to transmit the grouped data of transmitting into AT for the mode of AT transmitting grouped data.

Afterwards break switching mode and support the AT that a route is set up for connecting earlier, the mode that LNA transmits to the grouped data of AT transmission is preferably two originating party formulas; Afterwards break switching mode and support the AT that two routes are set up for connecting earlier, the mode that LNA transmits to the grouped data of AT transmission is preferably the single-shot mode; For the connection status hard handover approach, no matter AT supports a route to set up still two routes foundation, and the mode that LNA transmits to the grouped data of AT transmission is preferably two originating party formulas.

Concrete method flow diagram as shown in figure 17, its concrete steps are:

The S-CAP of step 1701, AT sends session and context transfer message to T-CAP, initiates the connection status direct-cut operation or connects the switching of afterwards breaking earlier, and this message is carried the routing mode information of switching mode information and AT support.

Step 1702, T-CAP send bind-request message for this AT to LNA, LNA is with the address of this AT and the address binding of T-CAP in request, this message carry the routing mode information supported according to switching mode information and AT definite be the mode information of AT transmitting grouped data.

In the present embodiment, if S-CAP initiates is once to connect earlier afterwards break to switch and AT supports is the mode that two routes are set up, the binding field is set to 0 in the time of the T-CAP bind-request message, expression employing single-shot mode, i.e. switching immediately; Otherwise the binding field is set to 1 in the time of the T-CAP bind-request message, and two originating party formulas are adopted in expression.

Step 1703, LNA are according to receiving the mode information grouped data that forwarding is transmitted for AT to T-CAP for the AT transmitting grouped data that this message is carried.

In the present embodiment, if this message time binding field is 1, then LNA continues to transmit grouped data for the AT transmission to S-CAP on the one hand, and on the other hand, LNA transmits the copy of the grouped data of transmitting for AT to T-CAP; If the field of group is 0 in the time of this message, then LNA stops to transmit the grouped data of transmitting for AT to S-CAP, and will transmit to T-CAP for the grouped data of AT transmission.

Step 1704, LNA send the response message of bind request to T-CAP.

Step 1705, T-CAP receive the difference forwarding of the grouped data of the AT transmission that LNA transmits according to what determine for the mode of AT transmitting grouped data.

Be two originating party formulas if be defined as the mode of AT transmitting grouped data, T-CAP abandons the grouped data of the AT transmission of the LNA forwarding that receives, up to step 1706; If being defined as the mode of AT transmitting grouped data is the single-shot mode, T-CAP transmits the packet count of the AT transmission that the LNA that receives transmits to AT.

If what step 1706 S-CAP initiated is the connection status direct-cut operation, T-CAP is at the signal of catching AT and finish the RLP reseting procedure, if S-CAP initiates is to connect earlier afterwards break to switch and AT supported is that a route is set up mode, then T-CAP startup RPL reseting procedure behind session that receives the S-CAP transmission and context handoff completion message; T-CAP is according to be the grouped data of the mode of AT transmitting grouped data to AT transmission: if two originating party formula, and the T-CAP grouped data that stops to abandon the grouped data of transmitting for AT that receives and begin to transmit then to AT.

In embodiments of the present invention, can also connect according to business the grouped data of AT is carried out the forwarding of different modes, below describe in detail.

Professional connection is the packet data transmission logical channel between AT and the PDSN, and professional the connection adopted the SR_D sign.Each comprises a RLP link in professional the connection, and an A8 connects and is connected with an A10.May there be a plurality of IP streams in each in professional the connection, a Reservation on each IP stream correspondence is eated dishes without rice or wine.

In the prior art, AT is according to the granularity application qos requirement of IP stream, concrete mode is by the mode notice packet data network qos requirement of consulting ReservationKKQoSRequestFwd or ReservationKKQoSRev configuration attribute to packet data network (because Reservation is unidirectional, so will divide forward direction and oppositely negotiation respectively).And the qos requirement that packet data network notifies terminal to satisfy by the mode of consulting ReservationKKQoSResponeFwd or ReservationKKQoSRev configuration attribute to AT.Reservation will be tied on the RLP link.For the close Reservation of qos requirement, can be tied to same RLP link.A RLP link, an A8 connect and the common corresponding Packet data service connection with SR_ID of A10 connection.

When S-AN transferred to T-AN with the Packet data service of AT, the SSIR of AT had comprised the request qos requirement of each Reservation and the qos requirement that satisfies.S-AN notifies T-AN with IP stream and the mapping relations of SR_D by the Forward QoSInforamtion field and the Reverse QoS Information field of A16-Session Transfer Request message simultaneously.

When T-AN sends A9-Setup-A8 message to T-PCF, request qos requirement by the included IP stream of all SR_ID of Forward QoS Information field and Reverse QoS Information field notice T-PCF and satisfy qos requirement, thus for shifting, the Packet data service of AT provides the basis.

T-PCF sets up an A10 for each Packet data service connects and connects, and T-PCF notifies the request qos requirement of each IP stream of T-PDSN and satisfies qos requirement in A11-Registration Request message.

Therefore, AN grasps the request qos requirement and the information that satisfies qos requirement that is connected the IP stream of being bound with each Packet data service with T-PCF.

Figure 18 is the method flow diagram of preferred embodiment three of the present invention definite packet data network side pass-through mode in handoff procedure, and its concrete steps are:

Step 1801, S-AN send A16-Session Transfer Request message to T-AN, initiate the connection status direct-cut operation or connect the handoff procedure that afterwards breaks earlier.

A16-Session Transfer Request wherein carries the SSIR of AT, in SSIR, carries Forward QoS Information and Reverse QoS Information, is used to identify the qos requirement information of the Packet data service of AT.

Step 1802, T-AN send A9-Setup-A8 message to T-PCF, and the Packet Service of setting up AT connects corresponding A8 and connects.T-AN starts timer TA8-setup simultaneously.

If what S-AN initiated is the foundation that once connects afterwards break transfer and two routes of AT support earlier, T-AN be provided with A9-Setup-A8 message eat dishes without rice or wine support that route field is " two routes ", otherwise be provided with A9-Setup-A8 message eat dishes without rice or wine support that route field is " single channel by ".

In this step, how T-AN judges switching type and how to judge that route that AT supports is set up mode identical with the described process of the step 1502 of Figure 15.But, inequality by the A9-Setup-A8 information reporting " single channel by " or the process of " two routes ".Its detailed process is as described below.

In the reserved field in existing A9-Setup-A8 message, increase a field Air InterfaceSupported Route, its form as shown in figure 19, this field is designated Air InterfaceSupported Route in the drawings, when being set to 0, represent " two routes ", when being set to 1, represent " 1 route ".In embodiments of the present invention, can also revise A9 indication (A9 Indicators) field in the A9-Setup-A8 message, to wherein certain keep the position, as the 2nd bit, as Air InterfaceSupported Route, when being set to 0, represent " two routes ", when being set to 1, represent " route ".

Step 1803, T-PCF send A11-Registration Request message to T-PDSN after receiving A9-Setup-A8 message, set up main A10 connection and are connected (if existing auxiliary A10 to connect) with all auxiliary A10.T-PCF starts timer Tregreq simultaneously.T-PCF is provided with each professional grouped data pass-through mode that connects pairing A10 connection according to eating dishes without rice or wine to support routing state in the A9-Setup-A8 message in conjunction with each professional qos requirement that satisfies that connects.

Specifically, if this AT eat dishes without rice or wine support that routing state is 0, i.e. the process of setting up of two routes, the data forwarding mode that each business of this AT of T-PCF connects is set to 0, is the single-shot mode; If the eating dishes without rice or wine of this AT supports that routing state is 1, be single channel by, T-PCF will judge that it is that real time business or non-real-time service are provided with the data forwarding mode that this business connects that each Packet data service of this AT connects the Packet data service of being carried: if real time business, the data forwarding mode that T-PCF should business connects is set to 1, promptly two originating party formulas; Otherwise the data forwarding mode that T-PCF should business connects is set to 0, is the single-shot mode.

In A11-Registration Request message, for each business is connected with a plurality of data forwarding types, wherein in Normal Vendor/Organization Specific Extension, have a plurality of application types and application sub-type, increase a kind of application type Data ForwardingType and application sub-type Service Connection Data Forwarding Type in embodiments of the present invention.The record of each ServiceConnection Data Forwarding Type application sub-type is made of SR_ID field and a Data Forwarding the type field, identifies a professional grouped data pass-through mode that connects.If this Data Forwarding the type field is set to 0, then expression adopts the single-shot mode to send the grouped data that this SR_ID corresponding service connects.If this Data Forwarding the type field is set to 1, then expression adopts two originating party formulas to send the grouped data that this SR_ID corresponding service connects.

In the present embodiment, when T-AN sends A9-Setup-A8 message to T-PCF, notify the request qos requirement of the included IP stream of all SR_ID of T-PCF and satisfy qos requirement by ForwardQoS Information field and Reverse QoS Information field.Wherein, Forward QoSInformation is made up of a plurality of Forward QoS Information Entry.The corresponding Packet data service of each Forward QoSInformation Entry connects, the corresponding IP stream of each the Forward Flow Entry among the Forward QoS InformationEntry.Forward Granted qos field in Forward Flow Entry is represented the QoS quality of the actual acquisition of AT, therefore, can judge the QoS attribute of corresponding IP stream by this field.

In Forward Granted qos field, two kinds of set-up modes are arranged.

First kind of set-up mode: the VEBOSE field that is provided with among the Forward Granted QoS is 0.The parameter value that this moment the FlowProfileID value among the Forward Granted QoS should be set and not be provided with among other Forward Granted QoS comprises Traffic_Class, Peack_Rate, Bucket_Size, Token_Rate etc.The FlowProfileID value should be provided with according to the regulation of C.R1001.

At this moment, can judge the QoS attribute of this IP stream according to the value of FlowProfileID.For example, if when the property value of this FlowProfileID is Speech Service or Video Service, can belong to the real time packet data business; Other belong to non real-time Packet data service etc.

In embodiments of the present invention, can also be re-classified as each value of FlowProfileID and belong to real time packet data business or non real-time Packet data service.

Second kind, the VEBOSE field is set is changed to 1.Be not provided with the FlowProfileID value and other parameter value is set comprises Traffic_Class, Peack_Rate, Bucket_Size, Token_Rate etc. this moment.

At this moment the QoS attribute of this IP stream can be judged according to the value of Traffic_Class,, just real time packet data business etc. can be belonged to if when the property value of this Traffic_Class is Conversational.

In embodiments of the present invention, can also be re-classified as each value of Traffic_Class and belong to real time packet data business or non real-time Packet data service.

Can judge the QoS attribute of each IP stream according to the method described above, promptly belong to the professional still non-packet data real time business of real time packet data.On this basis, can judge the QoS attribute that each Packet data service connects.Have at least one to be the real time packet data business if this Packet data service connects the IP stream (comprising forward direction or reverse) that is comprised, what this Packet data service connected carrying so is exactly the real time packet data business, otherwise is non-real time packet data business.In general, the QoS attribute that Packet data service connects the IP stream that is comprised is close, and IP stream that can the QoS attribute is not different is carried on same Packet data service and connects.

Step 1804, T-PDSN are that all A10 connect the P-P tunnel connection of setting up correspondence.

P-P Registration Request message and A11-Registration Request message format are identical.S-PDSN adopts different operations according to the data forwarding type of the Packet data service connection of the P-P Registration Request message that receives.

If the data forwarding type that this Packet data service of this AT connects is two originating party formulas, on the one hand, S-PDSN continues to transmit this business by S-PCF and connects the data that pairing A10 connects.On the other hand, S-PDSN transmits the copy that this Packet data service connects the data of pairing A10 connection by the P-P tunnel of setting up to T-PDSN.If the data forwarding type that this business of this AT connects is the single-shot mode, S-PDSN stops to transmit this Packet data service to S-PCF and connects the data that pairing A10 connects, and transmits to T-PDSN by the P-P tunnel and this Packet data service is connected the data that pairing A10 connects.

Step 1805, T-PDSN send A11-Registation Reply message to T-PCF.T-PCF stops timer Tregreq after receiving response message A11-Registration Reply message.

This process is identical with step 1505 among Fig. 5.

Step 1806, T-PCF send A9-Connect A8 message to T-AN.T-AN stops timer TA8-setup after receiving response message A11-Registration Reply message.

This process is identical with step 1506 among Fig. 5.

Step 1807, T-PCF handle in different ways according to the data forwarding type of the business connection of this AT and receive that T-PDSN transmits this business and connects the data that pairing A10 connects.

If the data forwarding type that this Packet data service connects is two originating party formulas, T-PCF abandons and receives the grouped data that this Packet data service connects pairing A10 connection, till step 1809.Otherwise T-PCF will receive this Packet data service and connect the grouped data that pairing A10 connects and be transmitted to T-AN.

If what step 1808 S-AN initiated is the connection status hard handover approach, then T-AN sends the A9-AL connection message to T-PCF after catching the AT signal and finishing the RLP reseting procedure, and T-AN starts timer T simultaneously _Alc9If S-AN initiates is to connect the switching mode and AT supported is that a route is set up mode of afterwards breaking earlier, then T-AN starts the RLP reseting procedure behind the A16 session handoff completion message that receives the S-AN transmission, T-AN sends the A9-AL connection message to T-PCF subsequently, and T-AN starts timer T simultaneously _Alc9If S-AN initiates is to connect the switching mode and AT supported is that two routes are set up mode of afterwards break earlier, and then T-AN need not start the RLP reseting procedure behind the A16 session handoff completion message that receives the S-AN transmission, getting final product according to the prior art processing.

This process is identical with step 1508 among Fig. 5.

Step 1809, T-PCF send the A9-AL connection response message to T-AN, T-AN stops timer Talc9 after receiving this message, the grouped data pass-through mode that T-PCF connects according to this business is transmitted this business to T-AN and connected the grouped data that pairing A10 connects: if the grouped data pass-through mode that should business connects is two originating party formulas, then T-PCF stops to abandon this business that receives and connects the grouped data that pairing A10 connects and begin to transmit this business to T-AN and connect the grouped data that pairing A10 connects.

Step 2001, S-AN send A16-Session Transfer Request message to T-AN, initiate the connection status direct-cut operation or connect the handoff procedure that afterwards breaks earlier.

Step 2002, T-AN send A9-Setup-A8 message to T-PCF, and the A8 that sets up the Packet data service join dependency connection of AT connects.T-AN starts timer TA8-setup simultaneously.

If what S-AN initiated is the foundation that once connects afterwards break transfer and two routes of AT support earlier, the data forwarding type field that T-AN is provided with the AT Packet data service of A9-Setup-A8 is a single-shot, otherwise, if what this Packet Service connected carrying is the real time packet data business, the data forwarding type that this Packet data service connection then is set is sent out for two, if what this Packet Service connected carrying is non-real time packet data business, the data forwarding type that this Packet data service connection then is set is a single-shot.

In this step, how T-AN judges switching type and how to judge that route that AT supports is set up mode identical with the described process of the step 1502 of Figure 15.But, how to judge that grouped data that AT transmits is that the process of real time packet data business is inequality, its detailed process is as described below.

In the present embodiment, S-AN comprises ReservationKKQoSRequest (Fwd/Rev) and ReservationKKQoSResponse (Fwd/Rev) attribute to the SSIR that T-AN transmits.They have represented AT respectively is that qos requirement and the AN that a Reservation asks is the qos requirement that AT satisfies.In addition, ForwardQoS Inforamtion in the A16-Session Transfer Request message and Reverse QoS Information have carried the mapping relations of each Packet data service connection identifier SR_ID and each IP stream.By these two fields, can learn which Packet data service certain IP stream belongs to and connect, can learn also which IP stream certain Packet data service connection comprises.

ReservationKKQoSRequest (Fwd/Rev) is identical with the form of ReservationKKQoSResponse (Fwd/Rev) attribute.What the embodiment of the invention related generally to is ReservationKKQoSResponse (Fwd/Rev) attribute.Because the QoS quality of the actual acquisition of this expression AT.

The embodiment of the invention is the QoS attribute that example is judged this IP stream with ReservationKKQoSResponseFwd, in ReservationKKQoSResponseFwd, the collocation method of two kinds of property values is arranged also.

First method is that the ProfileType value among the ReservationKKQoSResponseFwd is 0x01, and the corresponding VERBOSE that increases embodiment one is set to 0 situation, promptly represents qos requirement by FlowProfileID.It is the same that the method for judging this IP stream qos requirement this moment and the VERBOSE of Figure 18 are set to 0 o'clock method, no longer detailed description.

Second method is that the ProfileType value among the ReservationKKQoSResponseFwd is 0x02, and the VERBOSE of corresponding Figure 18 is set to 1 situation, promptly represents qos requirement by concrete QoS property value.It is the same that the method for judging this IP stream qos requirement this moment and the VERBOSE of Figure 18 are set to 1 o'clock method, no longer detailed description.

Can judge the QoS attribute of each IP stream according to the method described above, promptly belong to the professional still non real-time Packet data service of real time packet data.On this basis, can judge the QoS attribute that each Packet data service connects.Have at least one to be the real time packet data business if this Packet data service connects the IP stream (comprising forward direction or reverse) that is comprised, what this Packet data service connected carrying so is exactly the real time packet data business, otherwise is non-real time packet data business.In general, the QoS attribute that Packet data service connects the IP stream that is comprised is close, and IP stream that can the QoS attribute is not different is carried on same Packet data service and connects.

The embodiment of the invention increases a field Data Forwarding Type in A9-Setup-A8, this field can comprise that a plurality of indication different business connect the send mode that is adopted, as shown in figure 21: comprise that A9 message identifier, length and a plurality of indication different business connect the field (Data Forwarding Type Entry) of the send mode that is adopted.

For each professional send mode that is adopted that connects, its form is as shown in figure 22: comprise the length of this field, professional SR_ID and the pass-through mode information that connects, in this pass-through mode information, be set to 0 expression single-shot mode, be set to 1 and be expressed as two originating party formulas.

After step 2003, T-PCF receive A9-Setup-A8 message, send A11-Registration Request message, set up main A10 connection and be connected (if existing auxiliary A10 to connect) with all auxiliary A10 to T-PDSN.T-PCF starts timer Tregreq simultaneously.T-PCF is provided with the professional numerical value that connects the data forwarding type in the A11-Registration Request message according to data forwarding mode in the A9-Setup-A8 message.

If the data forwarding type that this Packet data service connects is the single-shot mode, the respective packets data service then is set in the A11-Registration Request message, and to connect the data forwarding type be the single-shot mode, connects the data forwarding type and be two originating party formulas otherwise corresponding service is set in the A11-Registration Request message.Step 1803 narration among the structure of A11-Registration Request message and Figure 18 identical.

Step 2004, T-PDSN are that all A10 connect the P-P connection of setting up correspondence.

Step 2005, T-PDSN send response message A11-Registation Reply message to T-PCF.T-PCF stops timer Tregreq after receiving response message A11-Registration Reply message.

T-PDSN sends A11-Registation Reply message to T-PCF.T-PCF stops timer Tregreq after receiving response message A11-Registration Reply message.

This process is identical with step 1505 among Fig. 5.

Step 2006, T-PCF send A9-Connect A8 message to T-AN.T-AN stops timer TA8-setup after receiving response message A11-Registration Reply message.

This process is identical with step 1506 among Fig. 5.

Step 2007, T-PCF handle in different ways according to the data forwarding type of the business connection of this AT and receive that T-PDSN transmits this business and connects the data that pairing A10 connects.

If what step 2008 S-AN initiated is the connection status hard handover approach, then T-AN sends the A9-AL connection message to T-PCF after catching the AT signal and finishing the RLP reseting procedure, and T-AN starts timer T simultaneously _Alc9If S-AN initiates is to connect the switching mode and AT supported is that a route is set up mode of afterwards breaking earlier, then T-AN starts the RLP reseting procedure behind the A16 session handoff completion message that receives the S-AN transmission, T-AN sends the A9-AL connection message to T-PCF subsequently, and T-AN starts timer T simultaneously _Alc9If S-AN initiates is to connect the switching mode and AT supported is that two routes are set up mode of afterwards break earlier, and then T-AN need not start the RLP reseting procedure behind the A16 session handoff completion message that receives the S-AN transmission, getting final product according to the prior art processing.

This process is identical with step 1508 among Fig. 5.

Step 2009, T-PCF send the A9-AL connection response message to T-AN, T-AN stops timer Talc9 after receiving this message, the grouped data pass-through mode that T-PCF connects according to this business is transmitted this business to T-AN and connected the grouped data that pairing A10 connects: if the grouped data pass-through mode that should business connects is two originating party formulas, then T-PCF stops to abandon this business that receives and connects the grouped data that pairing A10 connects and begin to transmit this business to T-AN and connect the grouped data that pairing A10 connects.

The embodiment of the invention also provides a kind of system of definite grouped data pass-through mode, and as shown in figure 23, this system comprises AT, AN and packet data network side, wherein,

When AT switches, the S-AN of AT sends the session handoff request message of the routing mode information of carrying switching mode information and AT support to T-AN, the information that T-AN carries according to the session handoff request message that receives is determined the mode of the grouped data of transmission AT, notify this mode to the packet data network side, the packet data network lateral root transmits the grouped data of AT according to the mode of this notice.

In the present embodiment, the packet data network side comprises PCF and PDSN, when in AT is PDSN, switching, T-AN is to the mode of the grouped data of T-PCF notification transmission AT, T-PCF is to the mode of the grouped data of PDSN notification transmission AT, PDSN transmits the grouped data of AT according to the mode of this notice, and T-PCF transmits the grouped data of AT according to the mode of this notice.When AT is switching between PDSN, T-AN is to the mode of the grouped data of T-PCF notification transmission AT, T-PCF is to the mode of the grouped data of T-PDSN notification transmission AT, T-PDSN is after the mode of the grouped data of S-PDSN notification transmission AT, S-PDSN transmits the grouped data of AT according to the mode of this notice, T-PDSN transmits the grouped data of AT according to the mode of this notice, and T-PCF transmits the grouped data of AT according to the mode of this notice.

In the present embodiment, AN can be CAP, and the packet data network side comprises LNA, at this moment, T-CAP is to the mode of the grouped data of LNA notification transmission AT, and LNA transmits the grouped data of AT according to the mode of this notice, and T-CAP transmits the grouped data of AT according to the mode of the grouped data of transmission AT.

The embodiment of the invention also provides a kind of device of determining the grouped data pass-through mode in handoff procedure, and as shown in figure 24, this device is arranged among the AN, comprises the packet data mode order unit really that determines transmission AT, receiving element and transmitting element, wherein,

Receiving element is used to receive the session handoff request message of the routing mode information that the switching mode information of carrying that AT sends and AT support, the routing mode information that the switching mode information of carrying and AT are supported sends in the determining unit;

In the present embodiment, this device can also be arranged among the CAP, at this moment, also comprise transmission unit.Determining unit, the mode information that is further used for transmission AT grouped data that will be definite sends to transmission unit, and transmission unit is used for basis from this mode information that determining unit receives, and adopts this mode to transmit the grouped data of AT.

Certainly, this device can also be arranged among the AN, at this moment, also comprises transmission unit.Determining unit, the mode information that is further used for transmission AT grouped data that will be definite sends to transmission unit, and transmission unit is used for basis from this mode information that determining unit receives, and adopts this mode to transmit the grouped data of AT.

From above-mentioned narration as can be seen, the embodiment of the invention can make the mode of the best forwarding AT institute transmitting grouped data of packet data network side employing according to the switching mode of AT and the mode of setting up route of AT support, has utilized the advantage of variety of way to greatest extent.Particularly for the transmission of real time packet data, interruption (or time-delay) minimum that makes real time packet data transmission when switching fast between PDSN; For the non real-time transmission of packet data, make that the network processes resource of waste is minimum.

The above only is preferred embodiment of the present invention, not in order to restriction the present invention, all any modifications of being made within the spirit and principles in the present invention, is equal to and replaces and improvement etc., all should be included within protection scope of the present invention.

Claims

1. method of determining the grouped data pass-through mode in handoff procedure is characterized in that this method comprises:

2. the method for claim 1 is characterized in that, the mode that described T-AN is defined as the AT transmitting grouped data is:

The switching mode information of carrying when this message is connection status hard handover approach and AT when supporting that route is set up mode information for the mode supporting one or two route and set up, and the mode that is defined as the AT transmitting grouped data is two originating party formulas;

When the switching mode information of carrying when this message supported that for connecting the mode of afterwards break and AT earlier route is set up mode information for the mode of two routes foundation of support, the mode that is defined as the AT transmitting grouped data was the single-shot mode;

When the switching mode information of carrying when this message supported that for connecting the mode of afterwards break and AT earlier route is set up mode information for the mode supporting a route and set up, the mode that is defined as the AT transmitting grouped data was pair originating party formulas.

3. method as claimed in claim 1 or 2 is characterized in that, described grouped data by AT transmission is connected by a main business connection and zero or a plurality of auxiliary activities is carried;

The mode of the described AT of being defined as transmitting grouped data is at each professional grouped data of being carried that connects.

4. method as claimed in claim 3 is characterized in that, is defined as at T-AN before the mode of AT transmitting grouped data, and this method also comprises:

T-AN judges that according to the service quality QoS property value that business connects the Internet protocol IP stream that is comprised this business connects the grouped data of being carried and whether belongs to the non real-time Packet data service, if do not belong to, carry out the step of the mode that is defined as the AT transmitting grouped data; If belong to, then directly adopting the single-shot mode is the AT transmitting grouped data.

5. method as claimed in claim 3 is characterized in that, after the mode that is defined as the AT transmitting grouped data was for two originating party formulas, this method also comprised:

T-AN judges that according to the QoS property value that business connects the IP stream that is comprised this business connects the grouped data of being carried and whether belongs to the real time packet data business, if belong to, carries out the subsequent step of the two originating party formulas that are defined as the AT transmitting grouped data; If do not belong to, after redefining the mode that transmits grouped data for AT and being the single-shot mode, carry out subsequent step.

6. the method for claim 1 is characterized in that, described to carry the message that switching mode information and AT support route to set up mode information be that message is switched in the A16 session, wherein,

The A16 session is switched when carrying serving sector and sector terminal point information in the message, described carry for connecting the switching mode information of afterwards breaking earlier; The A16 session is switched when not carrying serving sector and sector terminal point information in the message, described carry be connection status hard handover approach information;

When the property value corresponding with the tributary of the service application binding of packet data network switched in four tributaries of carrying in the message in the A16 session for the information supporting two routes and set up, described carry set up mode for two routes of AT support; Otherwise, described carry set up mode for AT supports a route.

7. method as claimed in claim 6, it is characterized in that, described packet data network side comprises packet data serving node PDSN and Packet Control Function PCF, AT is when switching in the PDSN, described T-AN is this mode notice packet data network side, and it is that the process of AT transmitting grouped data is that the packet data network side adopts this mode:

T-AN sends the A9-Setup-A8 message of carrying this mode information to the targeted packets controlled function T-PCF of AT, set up with T-PCF between A8 be connected;

After T-PCF receives A9-Setup-A8 message, send the A11 login request message of carrying this mode information to PDSN;

PDSN is defined as the mode of AT transmitting grouped data according to receiving this mode information that this A11 login request message is carried, and will be forwarded to T-PCF for the grouped data of AT transmission according to this mode;

T-PCF is defined as the mode of AT transmitting grouped data according to this mode information, handles accordingly according to the grouped data for the AT transmission that this mode will receive.

8. method as claimed in claim 7 is characterized in that, described PDSN according to the process that this mode will be forwarded to T-PCF for the grouped data of AT transmission is:

If being defined as the mode of AT transmitting grouped data according to this mode information is the single-shot mode, then PDSN only transmits the grouped data of transmitting for AT to T-PCF;

Be two originating party formulas if be defined as the mode of AT transmitting grouped data according to this mode information, then PDSN transmits the grouped data of transmitting for AT for simultaneously the S-PCF of T-PCF and AT.

9. method as claimed in claim 6, it is characterized in that described packet data network side comprises PDSN and PCF, AT is when switching between PDSN, described T-AN is this mode notice packet data network side, and it is that the process of AT transmitting grouped data is that the packet data network side adopts this mode:

After T-PCF receives A9-Setup-A8 message, send the A11 login request message of carrying this mode information to T-PDSN;

T-PDSN is connected with the P-P of the source packet data service service node S-PDSN of AT by the P-P login request message of carrying this mode information, this mode information that S-PDSN carries according to this message is defined as the mode of AT transmitting grouped data, transmit the grouped data of transmitting for AT according to this mode to T-PDSN, T-PDSN is transmitted to T-PCF again;

10. method as claimed in claim 9 is characterized in that, described S-PDSN to the process that T-PDSN transmits the grouped data of transmitting for AT is:

If being defined as the mode of AT transmitting grouped data according to this mode information is the single-shot mode, then S-PDSN only transmits the grouped data of transmitting for AT to T-PDSN;

Be two originating party formulas if be defined as the mode of AT transmitting grouped data according to this mode information, then S-PDSN transmits the grouped data of transmitting for AT for simultaneously S-PCF and T-PDSN.

11., it is characterized in that the process that described T-PCF handles accordingly according to the grouped data for the AT transmission that this mode will receive is as claim 7 or 9 described methods:

If when being defined as two originating party formula according to this mode information, then T-PCF abandons the grouped data for the AT transmission that receives, behind the A9-AL connection message that receives the T-AN transmission, stop to abandon, the grouped data for the AT transmission that begins to receive is transmitted to T-AN, and this A9-AL connection message is that T-AN carries out sending to T-PCF behind the Radio Link RLP reseting procedure;

If when being defined as the single-shot mode according to this mode information, then the T-PCF grouped data for AT transmission that will receive is transmitted to T-AN.

12. method as claimed in claim 1 or 2 is characterized in that, described to carry the message that switching mode information and AT support route to set up mode information be session and context transfer message;

Described T-AN comprises target control access point T-CAP;

Described packet network side comprises local network anchor point LNA, and described T-AN is this mode notice packet data network side, and it is that the process of AT transmitting grouped data is that the packet data network side adopts this mode:

T-CAP sends the bind-request message of carrying this mode information to LNA, LNA is defined as the mode of AT transmitting grouped data according to this entrained mode information, transmit the grouped data of transmitting for AT according to this mode to T-CAP, T-CAP handles the grouped data for the AT transmission that receives according to this mode.

13. method as claimed in claim 12 is characterized in that, described LNA according to this mode to the process that T-CAP transmits the grouped data of transmitting for AT is:

If when being defined as the single-shot mode according to this mode information, LNA only transmits the grouped data of transmitting for AT to T-CAP;

If when being defined as two originating party formula according to this mode information, LNA transmits grouped data into the AT transmission for T-CAP and S-CAP simultaneously.

14. method as claimed in claim 12 is characterized in that, described T-CAP handles the process for the grouped data of AT transmission that receives according to this mode and is:

If when being defined as two originating party formula, then T-CAP loses the grouped data for the AT transmission that receives, and after T-CAP carries out Radio Link RLP reseting procedure, stops to abandon, the grouped data of transmitting for AT that begins to receive is transmitted to AT;

If when being defined as the single-shot mode, then the T-CAP grouped data for AT transmission that will receive is transmitted to AT.

15. a system that determines the grouped data pass-through mode in handoff procedure is characterized in that this system comprises: AT, AN and packet data network side, wherein,

16. system as claimed in claim 15 is characterized in that, described packet data network side comprises PCF and PDSN,

AT is when switching in the PDSN, T-AN is to the mode of the grouped data of T-PCF notification transmission AT, T-PCF is to the mode of the grouped data of PDSN notification transmission AT, and PDSN transmits the grouped data of AT according to the mode of this notice, and T-PCF transmits the grouped data of AT according to the mode of this notice.

17. system as claimed in claim 15 is characterized in that, described packet data network side comprises PCF and PDSN,

When AT is switching between PDSN, T-AN is to the mode of the grouped data of T-PCF notification transmission AT, T-PCF is to the mode of the grouped data of T-PDSN notification transmission AT, T-PDSN is to the mode of the grouped data of S-PDSN notification transmission AT, S-PDSN transmits the grouped data of AT according to the mode of this notice, T-PDSN transmits the grouped data of AT according to the mode of this notice, and T-PCF transmits the grouped data of AT according to the mode of this notice.

18. system as claimed in claim 15, described AN comprises CAP, and the packet data network side comprises LNA,

T-CAP is to the mode of the grouped data of LNA notification transmission AT, and LNA transmits the grouped data of AT according to the mode of this notice, and T-CAP transmits the grouped data of AT according to the mode of this notice.

19. a device of determining the grouped data pass-through mode in handoff procedure is characterized in that, comprises determining unit, receiving element and transmitting element, wherein,

20. device as claimed in claim 19 is characterized in that, described device is arranged among the CAP, and this device also comprises transmission unit; Wherein,

Described determining unit, the mode information that is further used for transmission AT grouped data that will be definite sends to transmission unit;

Transmission unit is used for basis from this mode information that determining unit receives, and adopts this mode to transmit the grouped data of AT.

21. device as claimed in claim 19 is characterized in that, described device is arranged among the AN, and this device also comprises transmission unit, wherein, described determining unit, the mode information that is further used for transmission AT grouped data that will be definite sends to transmission unit;