CN101232436A - First path reversing data transmission method, network system, mobile terminal as well as access network - Google Patents

Abstract

The invention provides a method for a first path reverse data transmission during a switch process. The method comprises the follow steps that when a mobile terminal is switched to a second path from the first path, serial numbers of last bytes of the first path groups of all activated link streams transmitted from the first path transmission terminal of the mobile terminal are determined; the first path transmission terminal informs the first path transmission terminal of a source access network of the serial numbers; the source access network determines whether byte data corresponding to the serial numbers of all activated link streams and previous serial numbers is received by a first path receiving terminal after the serial numbers are acquired; and when the result is not determined, the data processing resources of the first path is not released. The invention further provides a network system, a mobile terminal and an access for implementing first path reverse data transmission during a switch process. The method solves latent problem of loss of the first path reverse data during a switch process of the mobile switch, and ensures the reliability of the first path reverse data transmission is ensured.

Description

First via path reversing data transmission method and network system, portable terminal and Access Network

Technical field

The present invention relates to the communications field, more specifically, relate to the first via path reversing data transmission method in the handoff procedure, also relate to network system, portable terminal and the Access Network of the first path reverse data transmission that is used for realizing handoff procedure.

Background technology

HRPD (High Rate Packet Data, HRPD (high rate packet data) technology) is accepted as one of 3G technology standard in calendar year 2001 by ITU, is the evolution version of CDMA20001x, optimizes at Packet data service specially.Make Before Break (MBB connects afterwards earlier and breaks) is used to shift the session information between AN (Access Network, Access Network) as a kind of new handoff technique.Specifically, MBB is used for the session of AT (Access Terminal accesses terminal, and refers to portable terminal here) that HRPD is used from S-AN (Source Access Network, the source Access Network) transfers to the process of T-AN (Target AccessNetwork, target access network).MBB only relates to the process that session is shifted, and does not relate to the process of Active Set management.The Active Set management comprises increases the sector, comprises the sector that increases other AN, and deletion sector and serving sector change.The process of Active Set management is finished by CrossConnectivity (cross bonding).

The precondition that MBB uses is a Cross Connectivity technology.

Fig. 1 shows the schematic diagram according to the cross bonding of prior art.It is process independently that MBB and Active Set are managed the two, can walk abreast and carry out.

Constitute by a plurality of sectors in the Active Set of AT.One of them is a serving sector.S-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 Connectivity and do not support one of main distinction of Cross Connectivity function.For the AN that does not support CrossConnectivity, do not allow the sector of other AN is joined in the Active Set of AT.The sector that adds other AN if desired, the sector that then needs to delete S-AN is transferred to other AN with session from S-AN simultaneously.This process is exactly the process of connected state direct-cut operation.For the AN that supports Cross Connectivity, allow the sector of other AN is joined in the Active Set of AT.The sector that adds other AN needn't cause the process of session transfer to the Active Set of AT.

If belong to the sector of other AN, S-AN by and other AN between interface (A17, A18 A19) manage these sectors.As shown in the figure, sector 3 is the sectors that belong to T-AN.S-AN is by A17, and A18, A19 come management sector 3.

Fig. 2 shows the MBB process that session is shifted between AN according to prior art, may further comprise the steps:

The first step enters Cross Connectivity state.S-AN has joined sector 3 (sector 3 is the sectors that belong to T-AN) in the Active Set.The second step S-AN initiation session transfer process, S-AN becomes Master AN (main AN), and T-AN becomes Slave AN (from AN).Slave AN will be attached on each sector in the Active Set, for session is switched ready.This moment, session control point was still at S-AN.The 3rd step T-AN substitutes S-AN becomes the session control point, and the session transfer process is finished.This moment, S-AN was still on each sector attached to Active Set.The 4th step S-AN is to the sector attachment removal in the Active Set.

As can be seen from the figure, MBB only relates to the process of conversation shift.With Active Set management irrelevant (the Active Set management comprises increases the sector, and deletion sector and serving sector change).The session control point changes in the process of MBB.Session control point switches the back at T-AN at S-AN before switching.

Enhanced Multi-Flow Packet Application (strengthens the multithread grouping and uses, EMFPA) support two data to handle the application of Route (path).AT uses a plurality of Link Flow (link flow) transmission to have the data of different QoS attribute, and each link flow is made of two paths, and two Route comprise Route A (first path) and RouteB (second path).The data processing path of Route A representative is made of AT and S-AN, and the data processing path of Route B representative is made of AT and T-AN.A RLP-A entity (Radio Link Protocol, radio link protocol) 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 constitute, and is responsible for the data transmit-receive work of Route A.It is a pair of corresponding that RLP-B entity on the T-A and RLP-B entity on the AT constitute, and is responsible for the data transmit-receive work between the Route B.Two pairs of RLP entities are finished the data transmit-receive process of this link flow independently of each other.

Fig. 3 has described the EMFPA of each Link Flow and the graph of a relation of upper-layer protocol and other agreement of air interface.Wherein the agreement of dash area is the agreement that is defined among the EMFPA.

Wherein Route Selection Protocol route higher layer protocol data units is to the A example or the B example of path agreement.The A example of path agreement and the RouteA of this Link Flow binding.The B example of path agreement and the Route B of this Link Flow binding.

There is one of four states in Route Selection Protocol (routable protocol), is respectively: A Open B Setting; A Open B Rising; A Setting B Open; A RisingB Open.

Following table shows the comparison according to the one of four states of the Route Selection Protocol of correlation technique:

State	AT receives definition	AT sends definition	Other
				A Open B Setting	If FlowNNSimultaneousDeliveryOnBothRoute sFwd is 01, then all gives Flow Protocol and handle until transition between states to A Open B Rising with the data of the Route A that receives and Route B; If FlowNNSimultaneousDeliveryOnBothRoute sFwd is 00, can receives the data of Route B and give Flow Protocol processing up to the data that begin to receive Route A.The data that abandon Route B afterwards until state transition to A Open B Rising	The PDU of Flow Protocol can only be routed to RouteA, the PDU of Flow Protocol should be routed to Route B
AOpen B Rising	Give Flow Protocol with the data of Route A and handle (will trigger state transition to B Open A Setting) if receive the data of the Route B of any Flow NN	The PDU of Flow Protocol can only be routed to RouteA, the PDU of Flow Protocol should be routed to Route B	From A Open B Setting move to before the A Open B Rising must initialization Route B Route Protocol and RLP
				B Open A Setting	If FlowNNSimultaneousDeliveryOnBothRoute sFwd is 01, then all gives Flow Protocol and handle until transition between states to B Open A Rising with the data of the RouteA that receives and Route B; If FlowNNSimultaneousDeliveryOnBothRoute sFwd is 00, can receives the data of RouteA and give Flow Protocol processing up to the data that begin to receive Route B.The data that abandon Route A afterwards until state transition to B Open A Rising	The PDU of Flow Protocol can only be routed to Route B, the PDU of Flow Protocol should be routed to RouteA
B Open A Rising	Give Flow Protocol with the data of Route B and handle (will trigger state transition to A Open B Setting) if receive the data of the RouteA of any Flow NN	The PDU of Flow Protocol can only be routed to Route B, the PDU of Flow Protocol should be routed to RouteA	From B Open A Setting move to before the B Open A Rising must initialization Route A Route Protocol and RLP

In general EMFPA and MBB are used.For AT, the incident that exists a Route to switch.Before this incident, AT receives the forward data of Route A, and reverse data is sent to Route A.After this incident, AT receives the forward data of Route B, and reverse data is sent to Route B.The incident that Route switches does not have inevitable precedence with the incident that session is shifted, and in other words, the time point that session control point shifts might be before the Route switching, also might be after the Route switching.

Fig. 4 shows the signaling process figure according to the MBB of prior art, and critical step is described below:

A. AN decision in source is shifted session to target AN, and S-AN determines to initiate MBB and switches according to the strategy that sets in advance;

D.S-AN sends session transfer request message to T-AN, and this message is carried the information of each sector in the session information of this AT and the Active Set.S-AN promptly becomes MasterAN, and T-AN promptly becomes Slave AN;

E.T-AN is attached on each sector in the Active Set;

G-j.T-AN sets up the A8 link to T-PCF (Packet Control Function Packet Control Function is the bridge between Access Network and the PDSN, and T-PCF is target P CF) request.T-PCF sets up A10 (A10/A11 is the interface between PCF and the PDSN, and wherein A11 is a signaling interface, and A10 is an interface in the user plane) link to T-PDSN (Packet Data Serving Node, packet data serving node, T-PDSN are target P DSN) request;

1.T-AN send the response message that shifts session to S-AN after finishing above preparation;

M.S-AN sends the session transfer to T-AN and finishes message.After receiving that message is finished in the session transfer, T-AN becomes Master AN, and S-AN becomes Slave AN.T-AN replaces the session control point that S-AN becomes AT;

V.S-AN is to each sector attachment removal in the Active Set.

More than be the signaling process of MBB, the interspersed with it process that also has the data processing path to switch of carrying out.

Step c is before the process of initiating MBB session transfer, and S-AN activates the Route B of AT.The example B of AT initialization RLP-B agreement and Route Protocol.AT enters A Open B rising state.

Step g～step j T-AN sets up corresponding A8 and A10 link.PDSN transmits data after having set up the A10 link immediately to T-AN.

Step n T-AN transmits from Route B the data that receive to AT.AT enters A setting B Open state after receiving the forward data of Route B, and promptly AT switches to Route B.Emphasize that at this though step n is after step m among Fig. 4, in fact step n might occur in before the step m, also might occur in after the step m.This forward data that depends on T-AN fully arrives AT by Route B time before T-AN receives time of A16-Session Transfer Complete message still after.A16 is the signaling interface between AN and the AN, is used between the AN of state of activation terminal that direct-cut operation shifts session information or MBB shifts session information.

S-AN shifts back (promptly sending A16-Session TransferComplete message to T-AN) finishing the MBB session, if also have data etc. to be sent in the buffer memory of S-PCF, S-PCF will continue the remaining data of transmission till buffer memory empties.If the S-PCF data in buffer empties, S-PCF send A9-Disconnect A8 (step u) trigger S-AN from all sector attachment removals of the Active Set of AT (step v) and S-AN discharge A8 and be connected (step w～step z) with A10.So far, S-AN has discharged all resources of Route A.AT can't send reverse data by Route A.

The subject matter that exists in the above-mentioned flow process is the problem that Route A exists reverse data to lose.The reason that causes this problem is that S-AN is whether buffer memory according to S-PCF empties and judge whether that S-AN should discharge the processing resource of Route A (be S-AN discharge A8 and A10 link from all the sector attachment removals and the S-AN of the Active Set of AT), and does not consider whether AT also has the problem of reverse data transmission at Route A.

For following two kinds of situations, even AT switches to Route B, AT still needs to continue to send the RLP grouping to Route A.First kind of situation is to have not send or sent part in the transmission buffer memory of RLP-A, but the high level data bag that does not send fully.Second kind of situation is that RLP-A receives that the NAK indication of S-AN needs to retransmit part and do not send successful byte.

So,, can not avoid the reverse data of Route A to lose fully according to the implementation method of flow process shown in Figure 5.

Summary of the invention

Embodiments of the invention aim to provide the first via path reversing data transmission method in a kind of handoff procedure, and the network system, portable terminal and the Access Network that are used for realizing the first path reverse data transmission of handoff procedure, lose problem to solve the first path reverse data that exists in the handoff procedure.

According to one embodiment of present invention, the first via in a kind of handoff procedure path reversing data transmission method is provided, may further comprise the steps: when portable terminal directly switches to second path from the first via, determine the sequence number of last byte of first path packet of all activated link flow that its first path transmitting terminal is sent; The first path transmitting terminal is notified this sequence number to the first path receiving terminal of source Access Network; The source Access Network confirms according to this sequence number whether the first path receiving terminal receives this sequence number and the pairing byte data of sequence number before thereof of all activated link flow after learning this sequence number; And when not obtaining confirming, then do not discharge the data processing resource in first path.

In above-mentioned first via path reversing data transmission method, the first path transmitting terminal notifies the first path receiving terminal of source Access Network may further comprise the steps this sequence number: the first path transmitting terminal sends the grouping serial number Indication message to the first path receiving terminal, comprises this sequence number in the grouping serial number Indication message.

In above-mentioned first via path reversing data transmission method, the source Access Network is also carried out following steps after learning this sequence number: the source Access Network sends grouping serial number indication response message to the first path transmitting terminal after receiving the grouping serial number Indication message of portable terminal.

In above-mentioned first via path reversing data transmission method, the structure of grouping serial number Indication message comprises following field: the LinkFlowNumber field, be used to identify link flow, and the TX-LAST field, be used to identify this sequence number.

In above-mentioned first via path reversing data transmission method, when portable terminal directly switches to second path from the first via, the sequence number of last byte of definite first path packet that is sent may further comprise the steps: if first path packet that portable terminal will not send continues to send in first path, the sequence number of the content of TX-LAST for last byte of this first path packet is set then.

In above-mentioned first via path reversing data transmission method, when portable terminal directly switches to second path from the first via, the sequence number of determining last byte of first path packet sent may further comprise the steps: send if first path packet that portable terminal will not send is inserted into the transmit queue in second path, then the content of TX-LAST is set to the sequence number of last byte of first path packet of last complete transmission.

In above-mentioned first via path reversing data transmission method, the structure of grouping serial number Indication message also comprises the Route field, and whether be used to identify this message is that first path sends.

In above-mentioned first via path reversing data transmission method, handoff procedure comprises and connects the handoff procedure that afterwards breaks earlier.

In above-mentioned first via path reversing data transmission method, the transmission of grouping receives follows radio link protocol.

According to one embodiment of present invention, a kind of network system is provided, be used for realizing the first path reverse data transmission of handoff procedure, comprise: portable terminal, it is used for when the first via directly switches to second path, determine the sequence number of last byte of first path packet of all activated link flow that its first path transmitting terminal is sent, the first path transmitting terminal is notified this sequence number to the first path receiving terminal of source Access Network; The source Access Network, it is used for after learning this sequence number, confirm that according to this sequence number whether the first path receiving terminal receives this sequence number and the pairing byte data of sequence number before thereof of all activated link flow, when not obtaining confirming, does not then discharge the data processing resource in first path.

According to one embodiment of present invention, a kind of portable terminal is provided, be used for realizing the first path reverse data transmission of handoff procedure, comprise: judge module, be used to make portable terminal when the first via directly switches to second path, determine the sequence number of last byte of first path packet of all activated link flow that the first path transmitting terminal of portable terminal is sent; And notification module, be used for the first path receiving terminal that the first path transmitting terminal is notified this sequence number to the source Access Network.

According to one embodiment of present invention, a kind of Access Network is provided, be used for realizing the first path reverse data transmission of handoff procedure, comprise: confirm module, be used to make Access Network after the sequence number of last byte of first path packet of all activated link flow that the first path transmitting terminal of learning portable terminal is sent, confirm according to this sequence number whether the first path receiving terminal of Access Network receives this sequence number and the pairing byte data of sequence number before thereof of all activated link flow; And release module, be used for when not obtaining confirming, then do not discharge the data processing resource in first path.

By technique scheme, potential Route A reverse data is lost problem when the invention solves the portable terminal switching, has guaranteed the reliability of the reverse data transmission of Route A.

Other features and advantages of the present invention will be set forth in the following description, and, partly from specification, become apparent, perhaps understand by implementing the present invention.Purpose of the present invention and other advantages can realize and obtain by specifically noted structure in the specification of being write, claims and accompanying drawing.

Description of drawings

Accompanying drawing described herein is used to provide further understanding of the present invention, constitutes the application's a part, and illustrative examples of the present invention and explanation thereof are used to explain the present invention, do not constitute improper qualification of the present invention.In the accompanying drawings:

Fig. 1 shows the schematic diagram of the cross bonding of prior art;

Fig. 2 shows the MBB process that session is shifted between AN of prior art;

Fig. 3 shows the EMFPA of each Link Flow of prior art;

Fig. 4 shows the signaling process figure of the MBB of prior art;

Fig. 5 shows the flow chart of the Route A reversing data transmission method of the embodiment of the invention;

The RLP that Fig. 6 shows the embodiment of the invention is cut apart schematic diagram.

Embodiment

Below with reference to the accompanying drawings and in conjunction with the embodiments, describe the present invention in detail.

Fig. 5 shows the Route A reversing data transmission method according to the embodiment of the invention, may further comprise the steps:

When step S10, AT switch to Route B from Route A, determine the sequence number of last byte of the Route A grouping of all activated link flow that its Route A transmitting terminal is sent;

Step S20, Route A transmitting terminal notify this sequence number the Route A receiving terminal of S-AN;

Step S30, S-AN confirm according to this sequence number whether Route A receiving terminal receives this sequence number and the pairing byte data of sequence number before thereof of all activated link flow after learning this sequence number; And

Step S40 when not obtaining confirming, does not then discharge the data processing resource of Route A.

In above-mentioned Route reversing data transmission method, handoff procedure can be the MBB handoff procedure, and the transmission of grouping and reception can be followed RLP.To illustrate the present invention with MBB handoff procedure and RLP grouping below.

Above-mentioned scheme is to allow the RLP-A of RLP-A notice S-AN of AT, the sequence number TX-LAST of last byte of the reverse data that the former sends.When AT switches to Route B from Route A, determine that this RLP-A will send, or certain RLP-A that has sent is grouped into last RLP-A grouping.The sequence number TX-LAST of last byte of the former reverse data of sending of the RLP-A of the RLP-A of AT notice S-AN.S-AN will guarantee just to discharge the data processing resource of Route A after affirmation receives last reverse byte of Route A behind the sequence number TX-LAST of last byte of the reverse data that the RLP-A that learns AT sends.

Specific embodiment is as follows:

Before the process of initiating MBB session transfer, S-AN activates the Route B of AT.The B example of AT initialization RLP-B agreement and Route Protocol.AT enters A OpenB rising state.

AT receives the forward data of Route B, triggers AT and enters A Setting B Open state.

AT determines the value of sequence number TX-LAST of last byte of RLP-A reverse data.

Following mask body is set forth the value of the sequence number TX-LAST of last byte how AT to determine the RLP-A reverse data.

Fig. 6 shows according to the RLP of the embodiment of the invention cuts apart schematic diagram.For in the transmit queue that is buffered in path agreement (Route Protocol) A example and the path protocol packet that never sent, the Z among the figure for example, AT should be inserted into these path protocol packet the transmit queue of path agreement B example, sends at Route B.

For being divided into RLP grouping, but the path protocol packet that does not send fully as yet, the Y among the figure for example has two kinds of schemes to handle:

(a) AT send Y to be sent out until Y at Route A relaying supervention and finishes.Handle in this manner, TX-LAST is the pairing sequence number of last byte of Y.More than figure is an example, TX-LAST=n+k+1+s-1.

(b) AT sends the transmit queue that Y is inserted into path agreement B example at Route B.Handle in this manner, TX-LAST is the pairing sequence number of last byte of X (the path protocol packet before the Y).More than figure is an example, TX-LAST=n-1.

AT is to the TX-LAST numerical value of last byte of the RLP-A entity reverse transfer data of all activated Link Flow of S-AN transmission RLP message ReverseLastS eq uenceIndication notice Route A.

In the form of RLP message ReverseLastSequenceIndication, can comprise following field:

Field	Length(bits)
		MessageID	8
Route	1
		ActiveLinkFlowCount	7

Above-mentioned field can be regarded the locomotive engine among the RLP message ReverseLastSequenceIndication as, also comprises ActiveLinkFlowCount following record can regarding the compartment as in the structure of this message:

LinkFlowNumber	5
		Reserved1	3
TX-LAST	6bits，14bits or 22bits
		Reserved2	0-7(as needed)

Be the detailed explanation of field in the his-and-hers watches below:

MessageID: the sender should this field be set to 0x61;

Route: if this message sends for Route A, the sender should field be set to " 0 ", otherwise the sender should this field be set to " 1 ";

ActiveLinkFlowCount: the sender should this field be set to be in the quantity of the Link Flow of state of activation.For each Link Flow that is in state of activation one group record is arranged all;

LinkFlowNumber: the sender should this field be set to the sign of the associated Link Flow of TX-LAST;

TX-LAST: the sender should this field be set to the sequence number of last byte of the reverse data of this Link Flow;

Reserved1: the sender should this field be set to 000;

Reserved2; The sender should be 8 integral multiple by filling 0 length than special envoy TX-LAST field.

Need to prove that this RLP message format is not the message format in the existing standard.

S-AN sends RLP sequence number indication response message ReverseLastSequenceIndicationAck to AT after receiving the ReverseLastSequenceIndication message of AT.

The form of RLP message ReverseLastSequenceIndicationAck is as follows:

Field	Length(bits)
		MessageID	8
Route	1
		Reserved	7

MessageID: the sender should this field be set to 0x62.

Route: if this message sends for Route A, the sender should field be set to " 0 ", otherwise the sender should this field be set to " 1 ";

Reserved: the sender should this field be set to 0000000.

Need to prove that this RLP message format is not the message format in the existing standard.

The RLP-A of S-AN will guarantee just to discharge the data processing resource of Route A after affirmation receives last reverse byte of Route A behind the sequence number TX-LAST of last byte that the RLP-A that learns AT sends.Be divided into following steps specifically:

(a) S-PCF is after receiving the A11-Registartion Update message that PDSN sends, and S-PCF sends A11-Registation Acknowledge response message to PDSN.If the buffering area of S-PCF is not empty, then S-PCF continues to transmit the data of S-PCF buffering area, till the data of buffering area empty.

(b) S-PCF sends A9-Disconnect-A8 message to S-AN.S-AN checks the associated RLP-A entity of Link Flow of each activation of Route A.If still there is the RLP-A entity of Link Flow not receive last byte of reverse data and byte before thereof as yet, then S-AN continues to receive the reverse data of Route A, has all received up to the RLP-A entity of all Link Flow till last byte and byte before thereof of reverse data.

(c) S-AN attachment removal from each sector of Active Set.S-AN sends A9-Release-A8 message to S-PCF, discharges all A8 and connects.

(d) after S-PCF received A9-Release-A8 message, S-PCF sent A11-Registration Request message to PDSN, and its Lifetime field is set to 0.

(e) PDSN receives that the Lifetime field is after 0 the A 11-Registration Request message, to discharge corresponding A10 link.And transmission response message A11-Registration Reply message.

(f) after S-PCF received all 11-Registration Reply message, S-PCF sent A9-Release-A8-Complete message to S-AN.So far, S-AN finishes the dispose procedure to the data processing resource of RouteA.

According to above-mentioned Route A reversing data transmission method, a kind of network system also is provided in the embodiment of the invention, be used for realizing the Route A reverse data transmission of handoff procedure, comprise: AT, it is used for when Route A switches to Route B, determine the sequence number of last byte of the Route A grouping of all activated link flow that its Route A transmitting terminal is sent, Route A transmitting terminal is notified this sequence number the Route A receiving terminal of S-AN; S-AN, it is used for after learning this sequence number, confirm that according to this sequence number whether Route A receiving terminal receives this sequence number and the pairing byte data of sequence number before thereof of all activated link flow, when not obtaining confirming, does not then discharge the data processing resource of Route A.

In an embodiment of the present invention, a kind of AT is provided, be used for realizing the Route A reverse data transmission of handoff procedure, comprise: judge module, be used to make AT when Route A switches to Route B, determine the sequence number of last byte of the Route A grouping of all activated link flow that the Route A transmitting terminal of AT is sent; And notification module, be used for the Route A receiving terminal that Route A transmitting terminal is notified this sequence number S-AN.

In an embodiment of the present invention, a kind of AN is provided, be used for realizing the Route A reverse data transmission of handoff procedure, comprise: confirm module, be used to make AN after the sequence number of last byte of the Route A of all activated link flow that the Route A transmitting terminal of learning AT is sent grouping, confirm according to this sequence number whether the Route A receiving terminal of AN receives this sequence number and the pairing byte data of sequence number before thereof of all activated link flow; And release module, be used for when not obtaining confirming, then do not discharge the data processing resource of Route A.

As can be seen from the above description, potential Route A reverse data is lost problem when the invention solves the portable terminal switching, has guaranteed the reliability of the reverse data transmission of Route A.

Obviously, those skilled in the art should be understood that, above-mentioned each module of the present invention or each step can realize with the general calculation device, they can concentrate on the single calculation element, perhaps be distributed on the network that a plurality of calculation element forms, alternatively, they can be realized with the executable program code of calculation element, thereby, they can be stored in the storage device and carry out by calculation element, perhaps they are made into each integrated circuit modules respectively, perhaps a plurality of modules in them or step are made into the single integrated circuit module and realize.Like this, the present invention is not restricted to any specific hardware and software combination.Should be understood that the variation in these concrete enforcements is conspicuous for a person skilled in the art, do not break away from spiritual protection range of the present invention.

The above is the preferred embodiments of the present invention only, is not limited to the present invention, and for a person skilled in the art, the present invention can have various changes and variation.Within the spirit and principles in the present invention all, any modification of being done, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.

Claims (12)

1. the first via path reversing data transmission method in the handoff procedure is characterized in that, may further comprise the steps:

When portable terminal directly switches to second path from the first via, determine the sequence number of last byte of first path packet of all activated link flow that its first path transmitting terminal is sent;

The described first path transmitting terminal is notified described sequence number to the first path receiving terminal of source Access Network;

Described source Access Network confirms according to described sequence number whether the described first path receiving terminal receives the described sequence number and the pairing byte data of sequence number before thereof of described all activated link flow after learning described sequence number; And

When not obtaining confirming, then do not discharge the data processing resource in described first path.

2. first via path reversing data transmission method according to claim 1 is characterized in that, the described first path transmitting terminal notifies the first path receiving terminal of source Access Network may further comprise the steps described sequence number:

The described first path transmitting terminal sends the grouping serial number Indication message to the described first path receiving terminal, comprises described sequence number in described grouping serial number Indication message.

3. first via path reversing data transmission method according to claim 2 is characterized in that, described source Access Network is also carried out following steps after learning described sequence number:

Described source Access Network sends grouping serial number indication response message to the described first path transmitting terminal after receiving the grouping serial number Indication message of described portable terminal.

4. first via path reversing data transmission method according to claim 2 is characterized in that, the structure of described grouping serial number Indication message comprises following field:

The LinkFlowNumber field is used to identify link flow, and

The TX-LAST field is used to identify described sequence number.

5. first via path reversing data transmission method according to claim 4 is characterized in that, when portable terminal directly switched to second path from the first via, the sequence number of last byte of definite first path packet that is sent may further comprise the steps:

If first path packet that described portable terminal will not send continues to send, the sequence number of the content of TX-LAST for last byte of this first path packet is set then in described first path.

6. first via path reversing data transmission method according to claim 4 is characterized in that, when portable terminal directly switched to second path from the first via, the sequence number of last byte of definite first path packet that is sent may further comprise the steps:

If first path packet that described portable terminal will not send is inserted into the transmit queue in described second path and sends, then the content of TX-LAST is set to the sequence number of last byte of first path packet of last complete transmission.

7. first via path reversing data transmission method according to claim 4 is characterized in that the structure of described grouping serial number Indication message also comprises the Route field, and whether be used to identify this message is that described first path sends.

8. according to each described first via path reversing data transmission method in the claim 1 to 7, it is characterized in that described handoff procedure comprises and connects the handoff procedure that afterwards breaks earlier.

9. according to each described first via path reversing data transmission method in the claim 1 to 7, it is characterized in that the transmission of described grouping receives follows radio link protocol.

10. a network system is used for realizing the first path reverse data transmission of handoff procedure, it is characterized in that, comprising:

Portable terminal, it is used for when the first via directly switches to second path, determine the sequence number of last byte of first path packet of all activated link flow that its first path transmitting terminal is sent, the described first path transmitting terminal is notified described sequence number to the first path receiving terminal of source Access Network;

Described source Access Network, it is used for after learning described sequence number, confirm according to described sequence number whether the described first path receiving terminal receives the described sequence number and the pairing byte data of sequence number before thereof of described all activated link flow, when not obtaining confirming, then do not discharge the data processing resource in described first path.

11. a portable terminal is used for realizing the first path reverse data transmission of handoff procedure, it is characterized in that, comprising:

Judge module is used to make portable terminal when the first via directly switches to second path, determines the sequence number of last byte of first path packet of all activated link flow that the first path transmitting terminal of described portable terminal is sent; And

Notification module is used for the first path receiving terminal that the described first path transmitting terminal is notified described sequence number to the source Access Network.

12. an Access Network is used for realizing the first path reverse data transmission of handoff procedure, it is characterized in that, comprising:

Confirm module, be used to make described Access Network after the sequence number of last byte of first path packet of all activated link flow that the first path transmitting terminal of learning portable terminal is sent, confirm according to described sequence number whether the first path receiving terminal of described Access Network receives the described sequence number and the pairing byte data of sequence number before thereof of described all activated link flow; And

Release module is used for when not obtaining confirming, does not then discharge the data processing resource in described first path.

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