CN102246555A

CN102246555A - Method, base station and relay node for processing handover

Info

Publication number: CN102246555A
Application number: CN200980149442XA
Authority: CN
Inventors: 常俊仁; 李亚娟; 张亮亮
Original assignee: Huawei Technologies Co Ltd
Current assignee: Liang Aishan; Tang Guoyan
Priority date: 2009-05-07
Filing date: 2009-05-07
Publication date: 2011-11-16
Anticipated expiration: 2029-05-07
Also published as: WO2010127493A1; CN102246555B

Abstract

A method, base station and relay node for processing handover are provided by the embodiments of the present invention, relating to field of communications. In order to save radio resources during the handover procedure, the technical solution provided by the embodiment of the present invention includes: the elimination of the data packets of the user equipment in the cache is stopped, when a determination is made that the user equipment needs a handover, or at an appointed time after the determination; the receiving state information of the user equipment is acquired from the source relay node; the lost data packets are acquired from the source relay node according to the receiving state information, when the existence of the lost data packets is determined according to the receiving state information. The technical solution provided by the embodiment of the present invention can be applied to the communication systems handover.

Description

Method, base station and relay node for processing handover

Switching handling method, base station and via node technical field

The present invention relates to the communications field, more particularly to a kind of switching handling method, base station and via node.Background technology

In existing LTE (Long Term Evolut ion, Long Term Evolution）In system, in handoff procedure, downlink data packet can be handled by least following two modes：For RLC (Radio Link Contro l, wireless spread-spectrum technology）Affirmation mode, is currently accessed UE (User Equipment, user equipment）ENB (Evolved Node B, evolution base station）Sequentially by all eNB for not being transmitted to UE to be accessed by the UE downlink data packets being properly received and its sequence number;For RLC Unacknowledged Modes, the eNB for being currently accessed UE only will not be transmitted to UE to be accessed eNB to the UE downlink data packets sent.In addition, in handoff procedure, for RLC affirmation modes or RLC Unacknowledged Modes, be currently accessed UE eNB can be sent to S-GW (Serving Gateway gateways by all upstream data bags being properly received）.

In order to improve the data throughout of Cell Edge User, and also to expand MPS process area, in LTE-A, (Long Term Evolut ion Advanced, long evolving system is further enhanced）RN (Relay Node, via node are introduced in system）.In ARQ (the Automat ic Repeat Reques t, HARQ introduced employed in RN system）Mechanism is broadly divided into two kinds：End-to-end mechanism, by million mechanism.When being transmitted using end-to-end mechanism, eNB Slow are deposited from S-GW (Serving Gateway, gateway）After the packet of reception, corresponding RN is sent the packet to, when the eNB is received by the confirmation of the RN UE feedbacks forwarded, when confirming that the packet is properly received by UE, the eNB just deposits middle removing packet from Slow.However, because eNB will wait until that the confirmation message that UE is reported just is removed Slow and deposited always, therefore, when eNB services multiple RN, the Slow that eNB takes deposits excessive.

To overcome above mentioned problem, a kind of transmission technology of hop-by-hop mechanism is used.When using the transmission of hop-by-hop mechanism, eNB Slow are deposited after the packet received from S-GW, send the packet to corresponding RN, when the eNB confirms that the packet is properly received by the RN, and the eNB just deposits middle removing data from Slow Bag.Therefore, eNB need not wait UE feedback acknowledgment information and take excessive Slow and deposit.During the present invention is realized, inventor has found that at least there are the following problems in the prior art：When being transmitted using hop-by-hop mechanism, when UE is switched to the eNB or other destination nodes of the RN from a RN, because the eNB packets for being sent to RN may be removed by eNB, RN needs the data packet back for sending eNB to be lost to eNB to prevent Shuo Ju Lost, and this passback process can waste the Radio Resource between RN and eNB.

The content of the invention

Embodiments of the invention provide a kind of switching handling method, base station and via node, and Radio Resource can be saved in handoff procedure.

To reach above-mentioned purpose, embodiments of the invention are adopted the following technical scheme that：

A kind of switching handling method, including：

It is determined that user equipment need switching when, or it is determined that the user equipment need switch after the specified moment, stop remove Slow deposit described in user equipment packet；

The receiving status information of the user equipment is obtained from the source via node；

When determining the packet that Cun Lost lose according to the receiving status information, the packet that Suo Shu Lost lose is obtained from the source via node according to the receiving status information.

A kind of base station, including：

Switch determining unit, for determining whether user equipment needs switching；

Stop clearing cell, for when the switching determining unit determines that the user equipment needs switching, or the specified moment after the switching determining unit determines that the user equipment needs to switch, stop removing Slow deposit described in user equipment packet；

Information acquisition unit, the receiving status information for obtaining the user equipment from the source via node；

Lost loses data determination unit, and the receiving status information Que for being obtained according to described information acquiring unit determines the packet that the no Cun Lost of Shi lose； Bao Shi, the packet for stating Lost mistakes is obtained according to the receiving status information from the source via node.A kind of switching handling method, including：

The receiving status information of user equipment is sent to source evolution base station；

When receiving by source evolution base station transmission Lost bag message, the packet that Gen loses according to Suo Shu Lost bags message to the source evolution base station Fa send Lost.

A kind of via node, including：

Status information transmitting element, the receiving status information for sending user equipment to source evolution base station；Lost bag message reception units, Lost bag message is sent for receiving by the source evolution base station；Lost loses data transmission unit, during for Suo Shu Lost bag message reception units Jie Shou Lost bag message, the packet that Gen loses according to Suo Shu Lost bags message to the source evolution base station Fa send Lost.

Switching handling method provided in an embodiment of the present invention, base station and via node, by source evolution base station when it is determined that user equipment needs switching, or it is determined that the user equipment needs the specified moment after switching, stop removing the packet that Slow deposits the middle user equipment received by source via node, and the receiving status information of the user equipment is obtained from source via node, when determining the packet that Cun Lost lose according to the receiving status information, the packet lost according to the receiving status information from the source via node Huo Qu Lost, reduce the possibility that source evolution Ji Zhan Lost in handoff procedure lose packet, reduction source via node returns to the bag quantity that cleared data of source evolution base station, save Radio Resource.

Brief description of the drawings

Technical scheme in order to illustrate the embodiments of the present invention more clearly, the accompanying drawing used required in being described below to embodiment is briefly described, apparently, drawings in the following description are only some embodiments of the present invention, for those of ordinary skill in the art, on the premise of not paying creative work, other accompanying drawings can also be obtained according to these accompanying drawings.

Fig. 1 is a kind of schematic flow sheet of switching handling method provided in an embodiment of the present invention；

A kind of schematic flow sheet for switching handling method that Fig. 2 provides for the embodiment of the present invention in situation 1；A kind of schematic flow sheet for switching handling method that Fig. 3 provides for the embodiment of the present invention in situation 2；A kind of schematic flow sheet for switching handling method that Fig. 4 provides for the embodiment of the present invention in situation 3； A kind of schematic flow sheet for switching handling method that Fig. 5 provides for the embodiment of the present invention in situation 4；A kind of schematic flow sheet for switching handling method that Fig. 6 provides for the embodiment of the present invention in situation 5；A kind of schematic flow sheet for switching handling method that Fig. 7 provides for the embodiment of the present invention in situation 6；A kind of schematic flow sheet for switching handling method that Fig. 8 provides for the embodiment of the present invention in situation 7；A kind of schematic flow sheet for switching handling method that Fig. 9 provides for the embodiment of the present invention in situation 8；The schematic flow sheet for another switching handling method that Figure 10 provides for the embodiment of the present invention in situation 2；

The schematic flow sheet for another switching handling method that Figure 11 provides for the embodiment of the present invention in situation 3；

The schematic flow sheet for another switching handling method that Figure 12 provides for the embodiment of the present invention in situation 4；

Fig. 13 is the schematic flow sheet of another switching handling method provided in an embodiment of the present invention；Figure 14 is a kind of composition schematic diagram of base station provided in an embodiment of the present invention；

Figure 15 is a kind of composition schematic diagram of via node provided in an embodiment of the present invention；

Figure 16 is a kind of composition schematic diagram of switching processing system provided in an embodiment of the present invention.

Embodiment

Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is clearly and completely described, it is clear that described embodiment is only a part of embodiment of the invention, rather than whole embodiments.Based on the embodiment in the present invention, the every other embodiment that those of ordinary skill in the art are obtained under the premise of creative work is not made belongs to the scope of protection of the invention.

In order to save the Radio Resource between the RN used in handoff procedure and eNB, the embodiments of the invention provide a kind of switching handling method, as shown in figure 1, switching handling method of the embodiment of the present invention, including：

101st, source evolution base station it is determined that user equipment need switching when, or it is determined that the user equipment need switch after the specified moment, stop remove Slow deposit described in user equipment packet.

Described here, being done to the several concepts used in embodiments of the present invention, wherein, source via node（Source re l ay node, S-RN) refer to the via node that user equipment is accessed before switching；Source Evolution base station（Source eNB, S-eNB) refer to the source via node that user equipment is accessed authorize (donor) evolution base station；And the object relay node being previously mentioned in the following description（Target re l ay node, T-RN) refer to the via node that user equipment is accessed after switching；Target evolution base station（Target eNB, T-eNB) refer to authorizing for the object relay node that user equipment is accessed after the evolution base station that user equipment is accessed after switching, or switching（Donor) evolution base station.

In addition, source evolution base station can also stop sending the packet of the user equipment to the source via node.

102nd, source evolution base station obtains the receiving status information of the user equipment from source via node.

Source via node can send receiving state report to source evolution base station, and source evolution base station obtains the receiving status information of the user equipment from the receiving state report of reception.Or, source via node can also carry receiving status information in the handover request sent to source evolution base station, and source evolution base station obtains the receiving status information of the user equipment from the handover request of reception.

103rd, source evolution base station according to the receiving status information when determining the packet that Cun Lost lose, the packet lost according to the receiving status information from the source via node Huo Qu Lost.

Source evolution base station can also send the packet of the user equipment and/or the reception state message of the user equipment according to the receiving status information to the destination node.

Switching handling method provided in an embodiment of the present invention, by source evolution base station when it is determined that user equipment needs switching, or it is determined that the user equipment needs the specified moment after switching, stop removing the packet that Slow deposits the middle user equipment received by source via node, and the receiving status information of the user equipment is obtained from source via node, when determining the packet that Cun Lost lose according to the receiving status information, the packet lost according to the receiving status information from the source via node Huo Qu Lost, reduce the possibility that source evolution Ji Zhan Lost in handoff procedure lose packet, reduction source via node returns to the bag quantity that cleared data of source evolution base station, save Radio Resource.

In the above-described embodiments, UE is switched to destination node from S-RN and can be largely classified into following four situation：UE is switched to S-eNB from S-RN;UE is switched to T-eNB from S-RN;UE is switched to access T-eNB T-RN from S-RN;UE is switched to access S-eNB T-RN from S-RN.Furthermore it is possible to be done by S-RN Go out the decision of UE switchings, determining for UE switchings can also be made by S-eNB.Below in conjunction with above-mentioned different situations, above-described embodiment is described in further detail.

Situation one, determining for UE switchings is made by S-RN, UE is switched to S-eNB from S-RN as shown in Fig. 2 switching handling method of the embodiment of the present invention, including：

201st, UE sends measurement report to source via node, and source via node is made switching according to measurement report and other wireless resource informations and determined, selection source evolution base station is destination node.

202nd, source via node sends handover request, contextual information of the handover request comprising UE etc. to source evolution base station.For example, the handover request can be realized by using the message mode of X2 interface and transmitted, and transmission can also be realized by using RRC information mode.

203rd, source evolution base station is received after the handover request, determine destination node for after the evolution base station of source according to the handover request, perform access control, if being determined to allow the user equipment to access according to the access control result, then source evolution base station stop removing Slow deposit described in user equipment packet, and stop sending the packet of the user equipment to the source via node.

S-eNB can parse the handover request after the handover request sent by S-RN is received, and the information that destination node is S-eNB is obtained from the handover request.In addition, the handover request can also carry destination address, and S-eNB judges the destination address of the handover request for itself after the handover request sent by S-RN is received, the handover request is then parsed, the information that destination node is S-eNB is obtained from the handover request.

In embodiments of the present invention, S-eNB stop removing Slow deposit described in UE packet, i.e. S-eNB is no matter whether its UE for being sent to S-RN packet has been correctly received, and these packets that Slow has been deposited all no longer are purged.Specifically, S-eNB stop remove Slow deposit described in UE packet at the beginning of carve can be S-eNB determine UE need switching at the time of, can also be S-eNB determine UE need switching at the time of to S-eNB stop to S-RN send packet at the time of between any time, can also be S-eNB stop to S-RN send packet at the time of.In addition, if S-eNB only stops removing the packet of the UE during Slow is deposited, do not stop sending packet to S-RN, then S-eNB stop remove Slow deposit described in UE packet at the beginning of carve can be S-eNB determine the UE need switching at the time of to S-eNB determine the UE be allowed to switching at the time of between any time or S-eNB determine the UE quilts At the time of allowing switching.

In situation one, S-eNB can at least stop sending the packet of the UE to S-RN at following several moment：

Stop sending the packet of the UE to S-RN after aftermentioned S-eNB sends Handover Request Acknowledge to S-RN；

Or S-eNB can also stop sending the packet of the UE to S-RN when it is determined that allowing UE to access；

Or S-eNB can also stop sending the packet of the UE to S-RN at the time of than determining to allow UE to access during delayed a period of time T.

Or can also be that S-RN sends switching command（Or it is referred to as the RRC connection reconfiguration messages with mobility control information）, S-RN by first from S-eNB newly receive but the sequence number of packet that is not sent to UE also is sent to S-eNB;When S-eNB receives the sequence number information, that is, stop sending UE packet to S-RN.

Or S-RN directly can send a stopping transfer request message to S-eNB, request S-eNB stops transmitting the data of the UE to S-RN.Stop sending the packet of the UE after S-eNB receives the message to S-RN.

Or can also be that S-eNB sends a stopping transfer request message to S-RN, then S-RN sends a confirmation message to S-eNB, stops sending the packet of the UE after S-eNB receives the confirmation message to S-RN.

Or can also be the packet for stopping sending the UE to S-RN when S-eNB receives the receiving state report for the UE that aftermentioned S-RN is sent.

204th, source evolution base station sends Handover Request Acknowledge to source via node.

205th, source via node is received after the Handover Request Acknowledge sent by source evolution base station, and the receiving state report of the user equipment is sent to source evolution base station.

Specifically, S-RN can just stop sending packet to UE when receiving Handover Request Acknowledge and the receiving state report of the UE is sent to S-eNB, can also stop when sending switching command to UE to UE Send packet and the receiving state report of the UE is sent to S-eNB.In addition, the receiving state report of the UE can also be sent to S-eNB by S-eNB when step 202 sends handover request.

In embodiments of the present invention, the content of the receiving state report is different under RLC affirmation modes and RLC Unacknowledged Modes：

For RLC affirmation modes：

The receiving state report can include S-RN to the sequence number of the UE one or more new packets finally sent and the reception state of the packet, and the sequence number of packet not being properly received by UE confirmations.Or, the receiving state report can also include sequence numbers of the S-RN to the UE one or more new packets not sent at first, and not confirmed by UE the sequence number of packet that is properly received.Or, the receiving state report can not also carry the sequence number for the packet not being properly received by UE confirmations, and carry the sequence number for the packet being properly received by UE confirmations.

In addition, the receiving state report can be a piece of news, can also be other forms, for example, S-RN sends one or more special terminating point packet to S-eNB, the terminating point packet includes sequence numbers of the S-RN to the UE one or more new packets finally transmitted, and the terminating point packet represents that current S-RN has stopped sending data to UE since which packet.Also, before the terminations packet that S-RN is sent comprising S-RN in the state report sent to S-eNB to UE and include the sequence number of packet including the termination packet, not being properly received by UE confirmations.

For RLC Unacknowledged Modes：

The receiving state report can include the sequence number for one or more new packets that S-RN is not sent at first to the sequence number or S-RN of the UE one or more new packets finally sent to UE.

The sequence number for the packet mentioned in the embodiment of the present invention, can be PDCP SDU (Packet Da ta Convergence Protoco l Service Data Uni t, PDCP Service Data Unit）Sequence number, or RLC SDU (Radio Link Control Service Data Uni t, wireless spread-spectrum technology Service Data Unit）Sequence number, or RLC PDU (Radio Link Control Protoco l Data Uni t, wireless link control protocol data cell）The sequence number of the core network data bag such as sequence number or RTP/UDP/ IP/ESP.In addition it is also possible to be a mapping table, should The RLC PDU and other packets not being properly received by UE are indicated in mapping table（Such as PDCP packets or core network data bag）Between sequence number corresponding relation.

206th, source evolution base station is received after the receiving state report, is removed Slow according to the receiving state report and is deposited middle redundant data bag.

In embodiments of the present invention, S-eNB is under RLC affirmation modes and RLC Unacknowledged Modes, and the method that redundant data bag is determined according to receiving state report is different：

For RLC affirmation modes：

S-eNB can confirm the sequence number for the packet being properly received according to S-RN to the sequence number of the UE new packets finally sent and not by UE, and Slow deposits the sequence number of middle UE packet, determine that Slow deposits middle sequence number before the sequence number of the packet finally sent, and be not that the sequence number of packet that is properly received is not confirmed by UE, to be confirmed the packet being properly received by UE, determination is confirmed that the packet being properly received is removed as redundant data bag by UE.Or, S-eNB can also confirm the sequence number for the packet being properly received according to S-RN to the sequence number of the UE new packets not sent at first and not by UE, and Slow deposits the sequence number of middle UE packet, it is determined that confirming the packet that is properly received by UE and being purged.

For RLC Unacknowledged Modes：

S-eNB can be according to S-RN to the sequence number of the UE new packets finally sent or the sequence number for the new packet not sent at first, and Slow deposits the sequence number of middle UE packet, the packet that UE described in warp-wise is sent during Slow is deposited is determined, the packet that UE described in the warp-wise of determination is sent is removed as redundant data bag.

207th, source evolution base station according to the receiving state report when determining that Cun Lost lose packet, according to the receiving state report Que Ding Lost mistake packet, and to the source via node Fa send Lost bag message, Suo Shu Lost bags message carry the Que Ding Lost mistakes packet sequence number.

In embodiments of the present invention, S-eNB is under RLC affirmation modes and RLC Unacknowledged Modes, according to receiving state report Que Ding the packet of Lost mistakes method it is different：

For RLC affirmation modes： S-eNB according to not by UE confirm the sequence number of packet and Slow that are properly received deposit described in UE packet sequence number, determine that Slow is non-existent in depositing and the packet that is properly received is not confirmed by the UE, the determination is not confirmed into the packet that the packet Zuo Wei Lost being properly received lose by the UE.Or, S-eNB can also according to by UE confirm the sequence number of packet and Slow that have been properly received deposit described in the UE sequence number Que of packet Ding the packets of Lost mistakes.

For RLC Unacknowledged Modes：

S-eNB according to sequence number from S-RN to the UE new packets finally sent, and the sequence number of the packet of the UE that Slow is deposited, determine sequence number and the at first packet sequence number of packet that Slow deposit between of the sequence number in the new packet finally sent, the packet that the packet Zuo Wei Lost of the determination are lost.Or, S-eNB can also according to sequence number from S-RN to the UE new packets not sent at first, and the sequence number of the packet of the UE that Slow is deposited, determine the sequence number or the sequence number and the packet of the sequence number between the sequence number for the packet that Slow is deposited at first in the new packet not sent at first for the new packet that Serial No. is not sent at first, the packet that the packet Zuo Wei Lost of the determination are lost.

208th, source via node is received after Suo Shu Lost bag message, the sequence number for the packet that Huo Qu Lost lose Cong Suo Shu Lost bag message, and Gen sends the packet that Suo Shu Lost lose according to the sequence number of the Suo Shu Lost packets lost to the source evolution base station.Source evolution base station is received after the packet that the Suo Shu Lost sent by the source via node lose, and Slow deposits the packet of Suo Shu Lost mistakes.

In addition, the user equipment performs the access to source evolution base station after the switching command sent by source via node is received.

Situation two, determining for UE switchings is made by S-RN, UE is switched to T-eNB from S-RN as shown in figure 3, switching handling method of the embodiment of the present invention, including：

301st, UE sends measurement report to source via node, and source via node is made switching according to measurement report and other wireless resource informations and determined, selection target evolution base station is destination node.

Step 302 is with step 202.

303rd, source evolution base station is received after the handover request, and it is target evolution base station to determine destination node, and the handover request is transmitted into target evolution base station. S-eNB can parse the handover request after the handover request sent by S-RN is received, and the information that destination node is T-eNB is obtained from the handover request, the handover request is transmitted into T-eNB.

304th, target evolution base station is received after the handover request of source evolution base station forwarding, performs access control.If access control result is allows the user equipment to access, target evolution base station sends Handover Request Acknowledge to source evolution base station.

305th, source evolution base station is received after the Handover Request Acknowledge sent by the target evolution base station, according to the Handover Request Acknowledge, it is determined that allowing the user equipment to access.Source evolution base station stop removing Slow deposit described in user equipment packet, and stop sending the packet of the user equipment to the source via node.

In situation two, S-eNB can at least stop sending the packet of the UE to S-RN at following several moment：

Stop sending the packet of the UE to S-RN after S-eNB forwards Handover Request Acknowledge to S-RN.Or S-eNB can also stop sending the packet of the UE to S-RN when receiving the Handover Request Acknowledge comprising permission UE accesses of T-eNB transmissions.

Or S-eNB can also stop sending the packet of the UE to S-RN at the time of than forwarding Handover Request Acknowledge to S-RN during delayed a period of time T.

Or when can also be that S-RN sends switching command, S-RN be that first sequence number from the S-eNB packets not sent to UE also still newly received can be sent into S-eNB;When S-eNB receives the sequence number information, that is, stop sending the packet of the UE to S-RN.

Or S-RN directly can send a stopping transfer request message to S-eNB, request S-eNB stops transmitting the data of the UE to S-RN.Stop transmitting the data of the UE after S-eNB receives the message to S-RN.

Or can also stop when S-eNB receives the receiving state report for the UE that aftermentioned S-RN is sent The packet of the UE is only sent to S-RN.

Step 306 ~ 31 0 are with step 204 ~ 208.

31 1, source evolution base station to target evolution base station send Slow deposit described in user equipment packet；And/or the reception state message of the user equipment is sent to the target evolution base station.

S-eNB can be being received after S-RN sends Lost mistake packets, and the packet and the reception state message of the UE of the UE during Slow is deposited just is sent to T-eNB.Or, S-eNB can also be after UE be successfully accessed T-eNB, the packet and the reception state message of the UE of the UE during Slow is deposited is sent to T-eNB, for example, UE is successfully accessed after T-eNB, T-eNB sends data transfer request to S-eNB, and S-eNB is received after the data transfer request, and the packet and the reception state message of the UE of the UE during Slow is deposited are sent to T-eNB.

Specifically, the receiving state report for the UE that S-eNB can be sent according to S-RN, sequentially descending is not transmitted to T-eNB by all by the sequence number of the UE packets being properly received and these packets.In addition, S-eNB can also will be sent to T-eNB from the new packet of the interfaces of S 1.

S-eNB can be transmitted to T-eNB by from the S-RN UE received receiving state report as reception state message.Or, S-eNB can also send a new reception state message to T-eNB.In embodiments of the present invention, S-eNB is under RLC affirmation modes and RLC Unacknowledged Modes, and the content to the T-eNB reception state message sent is different：

For RLC affirmation modes：

The reception state message includes sequence number and the reception state of the packet of the S-RN to the UE one or more new data packets finally sent, or S-RN to the sequence number of the UE one or more new packets not sent at first.Or, the reception state message can include T-eNB should to new allocation of packets first sequence number.

For RLC Unacknowledged Modes：

The reception state message includes sequence numbers of the S-RN to the UE one or more new data packets finally sent, or S-RN to the sequence number of the UE one or more new packets not sent at first.

In step 303,305, S-eNB needs parsing handover request and Handover Request Acknowledge.In addition, S-eNB can not also parse the handover request, and the handover request is passed through into target evolution base station.As shown in Fig. 10, switching handling method of the embodiment of the present invention, including：

Step 1 001 is with step 301.

1 002, source via node sends handover request, contextual information, destination address of the handover request comprising UE etc. to source evolution base station.For example, the handover request can be realized by using the message mode of X2 interface and transmitted, and transmission can also be realized by using RRC information mode.

1 003, source evolution base station is received after the handover request, and the destination address for determining handover request is not the address of oneself, and the handover request is passed through into target evolution base station according to the destination address.

Step 1 004 is with step 304.

1 005, source evolution base station is received after the Handover Request Acknowledge, and the Handover Request Acknowledge is passed through into source via node.

1 006, source via node is received after the Handover Request Acknowledge, and switch indicating information is sent to source evolution base station.

1 007, source evolution base station is received after the switch indicating information, is determined to allow user equipment to access according to the switch indicating information.Source evolution base station stop removing Slow deposit described in user equipment packet, and stop sending the packet of the user equipment to the source via node.

Step 1 008 ~ 1 012 are with step 307 ~ 31 1.

Situation three, make by S-RN determining for UE switchings, UE is switched to T-eNB T-RN as shown in figure 4, switching handling method of the embodiment of the present invention from S-RN, including：

401st, UE sends measurement report to source via node, and source via node is made switching according to measurement report and other wireless resource informations and determined, the object relay node of selection target evolution base station is destination node.

Step 402 is with step 302.

403rd, source evolution base station is received after the handover request, determines the object relay node that destination node is target evolution base station, the handover request is transmitted into target evolution base station.Target evolution base station is received after the handover request of source evolution base station forwarding, and the handover request is transmitted into object relay node. S-eNB can parse the handover request after the handover request sent by S-RN is received, and it is, by access T-eNB T-RN information, the handover request to be transmitted into T-RN that destination node is obtained from the handover request.

404th, object relay node is received after the handover request of target evolution base station forwarding, performs access control.If access control result is allows the user equipment to access, object relay node sends Handover Request Acknowledge to target evolution base station, and the Handover Request Acknowledge is transmitted to source evolution base station by target evolution base station.

405th, source evolution base station is received after the Handover Request Acknowledge, is determined to allow the user equipment to access according to the Handover Request Acknowledge.Source evolution base station stop removing Slow deposit described in user equipment packet, and stop sending the packet of the user equipment to the source via node.

In situation three, S-eNB can at least stop sending the packet of the UE to S-RN at following several moment：

Or when can also be that S-RN sends switching command, S-RN be that first sequence number from the S-eNB packets not sent to UE also still newly received can be sent into S-eNB;When S-eNB receives the sequence number information, that is, stop sending UE packet to S-RN.

Or can also stop when S-eNB receives the receiving state report for the UE that aftermentioned S-RN is sent Only data are transmitted to S-RN.

Step 406 ~ 41 1 are with step 306 ~ 31 1.

Another sunset is foretold, and T-eNB can also be after Handover Request Acknowledge be sent, to beautiful E (Mob i l i ty Management Ent i ty, mobility management entity to S-eNB）Bi-casting/Measurement Request is sent, then E asks to send the packet of current UE to S-eNB and T-eNB bi-castings/multicast to S-GW admittedly.S-GW agrees to carry out after bi-casting/multicast, and feeding back bi-casting/Measurement Request to beautiful E confirms.Then, beautiful E feeds back bi-casting/Measurement Request to T-eNB and confirmed.Or, S-eNB sends bi-casting/Measurement Request after the Handover Request Acknowledge of T-eNB forwardings is received to MME, and then MME asks to send the packet of current UE to S-eNB and T-eNB bi-castings/multicast to S-GW.S-GW agrees to carry out after bi-casting/multicast, and feeding back bi-casting/Measurement Request to beautiful E confirms.Then, MME feeds back bi-casting/Measurement Request to S-eNB and confirmed.

S-GW agrees to carry out after bi-casting/multicast, and UE packet is sent to S-eNB and T-eNB bi-castings/multicast.In step 41 1, S-eNB determines the packet for the UE that Slow is sent in depositing by S-GW unicasts according to bi-casting/multicast mark, under RLC affirmation modes, the packet sent by S-GW unicasts not being properly received by UE confirmations is forwarded to T-eNB, under RLC Unacknowledged Modes, the packet sent by S-GW unicasts that S-RN is not sent to UE is forwarded to T-eNB.

S-eNB determines that the mode of the packet for the UE that Slow is sent in depositing by S-GW unicasts has blunt a variety of according to bi-casting/multicast mark.For example, S-GW can add bi-casting/multicast mark on the packet that each bi-casting/multicast is sent, therefore, S-eNB can determine not carrying the packet of bi-casting/multicast mark in the packet for the UE that Slow is deposited, be the UE sent by S-GW unicasts packet.Or, S-GW can also add bi-casting/multicast mark on the packet that first bi-casting/multicast is sent, therefore, S-eNB can determine packet of the sequence number before the sequence number of packet of bi-casting/multicast mark is carried in the UE that Slow is deposited packet, be the UE sent by S-GW unicasts packet.

In step 403,405, S-eNB needs parsing handover request and Handover Request Acknowledge.In addition, S-eNB can not also parse the handover request, the handover request is passed through to the object relay node of target evolution base station.As shown in Fig. 11, switching handling method of the embodiment of the present invention, including：

Step 11 01 is with step 401. 11 02, source via node sends handover request, contextual information, destination address of the handover request comprising UE etc. to source evolution base station.For example, the handover request can be realized by using the message mode of X2 interface and transmitted, and transmission can also be realized by using RRC information mode.

11 03, source evolution base station is received after the handover request, and the destination address for determining handover request is not the address of oneself, and the handover request is passed through to the object relay node of target evolution base station according to the destination address.

11 04, object relay node is received after the handover request, performs access control.If access control result is allows the user equipment to access, object relay node sends Handover Request Acknowledge to source evolution base station.

11 05, source evolution base station is received after the Handover Request Acknowledge, and the Handover Request Acknowledge is passed through into source via node.

11 06, source via node is received after the Handover Request Acknowledge, and switch indicating information is sent to source evolution base station.

11 07, source evolution base station is received after the switch indicating information, is determined to allow user equipment to access according to the switch indicating information.Source evolution base station stop removing Slow deposit described in user equipment packet, and stop sending the packet of the user equipment to the source via node.

Step 1108 ~ 1112 are with step 407 ~ 411.

Situation four, make by S-RN determining for UE switchings, UE is switched to S-eNB T-RN as shown in figure 5, switching handling method of the embodiment of the present invention from S-RN, including：

501st, UE sends measurement report to source via node, and source via node is made switching according to measurement report and other wireless resource informations and determined, the object relay node of selection source evolution base station is destination node.

Step 502 is with step 202.

503rd, source evolution base station is received after the handover request, determines the object relay node that destination node is source evolution base station, the handover request is transmitted into object relay node.

504th, object relay node is received after the handover request of source evolution base station forwarding, performs access control.If access control result is allows the user equipment to access, object relay node is sent out to source evolution base station Send Handover Request Acknowledge.

505th, source evolution base station is received after the Handover Request Acknowledge, is determined to allow the user equipment to access according to the Handover Request Acknowledge.Source evolution base station stop removing Slow deposit described in user equipment packet, and stop sending the packet of the user equipment to the source via node.

In situation four, S-eNB can at least stop sending the packet of the UE to S-RN at following several moment：

Stop sending the packet of the UE to S-RN after S-eNB forwards Handover Request Acknowledge to S-RN.Or S-eNB can also stop sending the packet of the UE to S-RN when receiving the Handover Request Acknowledge comprising permission UE accesses of T-RN transmissions.

Or S-eNB can also shift to an earlier date at the time of than forwarding Handover Request Acknowledge to S-RN or stop sending to S-RN during delayed a period of time T the packet of the UE.

Step 506 ~ 51 0 are with step 204 ~ 208.

51 1, source evolution base station to object relay node send Slow deposit described in user equipment packet, and/or send to the object relay node reception state message of the user equipment.

S-eNB sends the specific implementation of UE packet and UE reception state message to T-RN Step 301 is may refer to, no longer Redundant is stated herein.

In step 503,505, S-eNB needs parsing handover request and Handover Request Acknowledge.In addition, S-eNB can not also parse the handover request, the handover request is passed through into object relay point.As shown in Fig. 12, switching handling method of the embodiment of the present invention, including：

Step 1201 is with step 501.

1202nd, source via node sends handover request, contextual information, destination address of the handover request comprising UE etc. to source evolution base station.For example, the handover request can be realized by using the message mode of X2 interface and transmitted, and transmission can also be realized by using RRC information mode.

1203rd, source evolution base station is received after the handover request, and the destination address for determining handover request is not the address of oneself, is passed through the handover request by the object relay node of access source evolution base station according to the destination address.

Step 1204 is with step 504.

1205th, source evolution base station is received after the Handover Request Acknowledge, and the Handover Request Acknowledge is passed through into source via node.

1206th, source via node is received after the Handover Request Acknowledge, and switch indicating information is sent to source evolution base station.

1207th, source evolution base station is received after the switch indicating information, is determined to allow user equipment to access according to the switch indicating information.Source evolution base station stop removing Slow deposit described in user equipment packet, and stop sending the packet of the user equipment to the source via node.

Step 1208 ~ 1212 are with step 507 ~ 51 1.

Situation five, determining for UE switchings is made by S-eNB, UE is switched to S-eNB from S-RN as shown in fig. 6, switching handling method of the embodiment of the present invention, including：

601st, user equipment sends measurement report and gives source via node, and the measurement report that the user equipment is sent is transmitted to source evolution base station by source via node.For example, the measurement report can be forwarded by using the message mode of X2 interfaces, can also be forwarded by using RRC information mode.

602nd, source evolution base station is received after the measurement report, according to the measurement report and other wireless moneys Source information is made switching and determined, it oneself is destination node to select.Perform access control, if being determined to allow the user equipment to access according to the access control result, then source evolution base station stop removing Slow deposit described in user equipment packet, and stop sending the packet of the user equipment to the source via node.

In situation five, S-eNB can at least stop sending the packet of the UE to S-RN at following several moment：

When S-eNB to S-RN send switching command（Or it is referred to as the RRC connections reconfiguration message with mobility control information) i.e. stopping sends the packet of the UE to S-RN afterwards.

When S-eNB shifts to an earlier date at the time of than sending switching command to S-RN or stops sending the packet of the UE during delayed a period of time T to S-RN.

Or S-eNB can also stop sending the packet of the UE to S-RN when determining to allow switching.Or S-eNB can also shift to an earlier date at the time of than determining to allow switching or stop sending to S-RN during delayed a period of time T the packet of the UE.

Or can also be the packet for stopping sending the UE to S-eNB when S-eNB receives the receiving state report for the UE that aftermentioned S-RN is sent.

603rd, source evolution base station sends switching command to source via node.

604th, source via node is received after the switching command sent by source evolution base station, and the receiving state report of the user equipment is sent to source evolution base station. S-RN sends UE reception state to S-eNB>The specific implementation of announcement may be referred to step 205, will not be repeated here.

Step 605 ~ 607 are with step 206 ~ 208.

Situation six, determining for UE switchings is made by S-eNB, UE is switched to T-eNB from S-RN as shown in fig. 7, switching handling method of the embodiment of the present invention, including：

Step 701 is with step 601.

702nd, source evolution base station is received after the measurement report, and making switching according to the measurement report and other wireless resource informations determines, selection target evolution base station is destination node, and sends handover request to target evolution base station.

703rd, target evolution base station is received after the handover request, performs access control.If access control result is allows the user equipment to access, target evolution base station sends Handover Request Acknowledge to source evolution base station.

704th, source evolution base station is received after the Handover Request Acknowledge sent by target evolution base station, according to the Handover Request Acknowledge, it is determined that allowing the user equipment to access.Source evolution base station stop removing Slow deposit described in user equipment packet, and stop sending the packet of the user equipment to the source via node.

In situation six, S-eNB can at least stop sending the packet of the UE to S-RN at following several moment：

Stop sending the packet of the UE to S-RN after S-eNB sends switching command to S-RN.When S-eNB shifts to an earlier date at the time of than sending switching command to S-RN or stops sending the packet of the UE during delayed a period of time T to S-RN.

Or when can also be that S-RN sends switching command, S-RN be that first sequence number from the S-eNB packets not sent to UE also still newly received can be sent into S-eNB;When S-eNB receives the sequence number information, that is, stop sending UE packet to S-RN. Or S-RN directly can send a stopping transfer request message to S-eNB, request S-eNB stops transmitting the data of the UE to S-RN.Stop transmitting the data of the UE after S-eNB receives the message to S-RN.

Step 705 ~ 706 are with step 603 ~ 604.

Step 707 ~ 71 0 are with step 308 ~ 31 1.

Situation seven, make by S-eNB determining for UE switchings, UE is switched to T-eNB T-RN as shown in figure 8, switching handling method of the embodiment of the present invention from S-RN, including：

Step 801 is with step 601.

802nd, source evolution base station is received after the measurement report, switching is made according to the measurement report and other wireless resource informations to determine, the object relay node of selection target evolution base station is destination node, and handover request is sent to target evolution base station, the handover request is transmitted to object relay node by target evolution base station.

803rd, object relay node is received after the handover request of target evolution base station forwarding, performs access control.If access control result is allows the user equipment to access, object relay node sends Handover Request Acknowledge to target evolution base station, and the Handover Request Acknowledge is transmitted to source evolution base station by target evolution base station.

804th, source evolution base station is received after the Handover Request Acknowledge, is determined to allow the user equipment to access according to the Handover Request Acknowledge.Source evolution base station stop removing Slow deposit described in user equipment packet, and stop sending the packet of the user equipment to the source via node.

In situation seven, S-eNB can at least stop sending the packet of the UE to S-RN at following several moment：

Stop sending the packet of the UE to S-RN after S-eNB sends switching command to S-RN. When S-eNB shifts to an earlier date at the time of than sending switching command to S-RN or stops sending the packet of the UE during delayed a period of time T to S-RN.

Step 805 ~ 806 are with step 603 ~ 604.

Step 807 ~ 81 0 are with step 408 ~ 41 1.

In addition, can be with T-eNB after Handover Request Acknowledge is sent to S-eNB, S-GW is asked to S-eNB and T-eNB bi-castings/multicast transmission UE packet by MME, or, can also S-eNB after the Handover Request Acknowledge that is sent by T-eNB is received, ask S-GW to send UE packet to S-eNB and T-eNB bi-castings/multicast by MME.S-eNB is forwarded to T-eNB does not confirm what is be properly received by UE, or the packet sent by S-GW unicasts that S-RN is not sent to UE.Specific implementation has been described in detail in situation three, therefore no longer Redundant is stated.

Situation eight, make by S-eNB determining for UE switchings, UE is switched to S-eNB T-RN as shown in figure 9, switching handling method of the embodiment of the present invention from S-RN, including： Step 901 is with step 601.

902nd, source evolution base station is received after the measurement report, and making switching according to the measurement report and other wireless resource informations determines, the object relay node of selection source evolution base station is destination node, and sends handover request to object relay node.

903rd, object relay node is received after the handover request that source evolution base station is sent, and performs access control.If access control result is allows the user equipment to access, object relay node sends Handover Request Acknowledge to source evolution base station.

904th, source evolution base station is received after the Handover Request Acknowledge, is determined to allow the user equipment to access according to the Handover Request Acknowledge.Source evolution base station stop removing Slow deposit described in user equipment packet, and stop sending the packet of the user equipment to the S-eNB.

In situation eight, S-eNB can at least stop sending the packet of the UE to S-RN at following several moment：

Stop sending the packet of the UE to S-RN after S-eNB sends switching command to S-RN.Or S-eNB can also shift to an earlier date at the time of than sending switching command to S-RN or stop sending to S-RN during delayed a period of time T the packet of the UE.

Or can also be the packet for stopping sending the UE to S-RN when S-eNB receives the receiving state report for the UE that aftermentioned S-RN is sent. Step 905 ~ 906 are with step 603 ~ 604.

Step 907 ~ 910 are with step 508 ~ 511.

In addition, in situation three, situation seven, the packet of S-GW bi-castings/current user equipment of multicast transmission is asked by source evolution base station or target evolution base station, target evolution base station is set directly to receive the packet of current user equipment from S-GW, the packet is transmitted to object relay node, the time delay of data transfer is not only reduced, also makes target evolution base station be easier to be ranked up packet.

With the above method correspondingly, the embodiment of the present invention additionally provides a kind of switching handling method, as shown in Figure 13, switching handling method of the embodiment of the present invention, including：

1301st, source via node sends the receiving status information of user equipment to source evolution base station；

1302nd, source via node is when receiving by source evolution base station transmission Lost bag message, the packet that Gen loses according to Suo Shu Lost bags message to the source evolution base station Fa send Lost.

Switching handling method provided in an embodiment of the present invention, the receiving status information of user equipment is sent to source evolution base station by source via node, make source evolution base station stop remove Slow deposit described in user equipment packet after, the no Cun Lost of Shi can be determined according to the receiving status information Que of user equipment and lose packet, source via node sends Lost bags message to source evolution base station transmission packet according to source evolution base station, reduce the possibility that source evolution Ji Zhan Lost in handoff procedure lose packet, reduction source via node returns to the bag quantity that cleared data of source evolution base station, save Radio Resource.

With the above method accordingly, the invention provides a kind of base station, as shown in figure 14, base station of the embodiment of the present invention, including： Switch determining unit 1401, for determining whether user equipment needs switching；

Stop clearing cell 1402, for when the switching determining unit 1401 determines that the user equipment needs switching, or the specified moment after the switching determining unit 1401 determines that the user equipment needs to switch, stop removing Slow deposit described in user equipment packet；

Information acquisition unit 1403, the receiving status information for obtaining the user equipment from source via node；

Lost loses data determination unit 1404, and the receiving status information Que for being obtained according to described information acquiring unit 1403 determines the packet that the no Cun Lost of Shi lose；

Lost loses data capture unit 1405, and when losing the packet that the determination Cun of data determination unit 1404 Lost lose for Suo Shu Lost, the receiving status information obtained according to described information acquiring unit 1403 obtains the packet that Suo Shu Lost lose from the source via node.

Further, the switching determining unit 1401 is specifically included：

Handover request receiving subelement, for receiving the handover request sent by the source via node；Handover request judgment sub-unit, the handover request for being received according to the handover request receiving subelement determines that the user equipment needs switching；

Or, the switching determining unit 1401 is specifically included：

Measurement report receiving subelement, the measurement report for receiving the user equipment sent by the source via node；

Measurement report judgment sub-unit, the measurement report for being received according to the measurement report receiving subelement determines that the user equipment needs switching.

Further, described information acquiring unit 1403 includes：

Status report reception subelement, for receiving the receiving state report sent by the source via node；State information acquisition subelement, the receiving status information for obtaining the user equipment in the receiving state report that is received from the status report reception subelement.

Further, Suo Shu Lost lose data capture unit 1405 and included：

Lost lose data determination subelement, for according to the receiving status information Que Ding Lost mistake packet； Lost bag message transmission sub-units, for the source via node Fa send Lost bag message, Suo Shu Lost bags message carry Suo Shu Lost lose data determination subelement Que Ding Lost mistakes packet sequence number；

Lost loses data receiver subelement, for receiving the packet that the Suo Shu Lost sent by the source via node lose.

Further, the base station also includes：

Redundant data determining unit, the receiving status information for being obtained according to described information acquiring unit determines whether there is unnecessary packet；

Slow deposits clearing cell, for when the redundant data determining unit determines to have unnecessary packet, the receiving status information obtained according to described information acquiring unit remove Slow deposit described in unnecessary packet.

Further, the base station also includes：

Data transmission unit, the receiving status information for being obtained according to described information acquiring unit sends the packet of the user equipment to destination node；

Status message transmitting element, the receiving status information for being obtained according to described information acquiring unit sends the reception state message of the user equipment to the destination node.

Further, the base station also includes transmission request reception unit, for receiving the data transfer request sent by the destination node.The data transfer request that the data transmission unit and status message transmitting element of the base station can be received according to the transmission request reception unit, sends the packet of the user equipment and the reception state message of the user equipment to destination node respectively.

Further, the data transmission unit is specifically included：

Unicast data determination subelement, for determining that unicast sends packet according to bi-casting/multicast mark；Data sub-element is transmitted, the receiving status information for being obtained according to described information acquiring unit sends the unicast for not confirming to be properly received by the user equipment or not sent to the user equipment to the destination node and sends packet.

Further, the base station also includes：

Request transmitting unit is sent, for sending bi-casting/Measurement Request to gateway by mobility management entity, the bi-casting/Measurement Request is used to ask the gateway to target evolution base station and source evolution base Bi-casting/multicast of standing sends packet；

Send and confirm receiving unit, confirm for receiving the bi-casting forwarded by the mobility management entity/Measurement Request；

New data receiving unit, for receiving the packet sent by the gateway bi-casting/multicast.Base station provided in an embodiment of the present invention, by when it is determined that user equipment needs switching, or it is determined that the user equipment needs the specified moment after switching, stop removing the packet that Slow deposits the middle user equipment received by source via node, and the receiving status information of the user equipment is obtained from source via node, when determining the packet that Cun Lost lose according to the receiving status information, the packet lost according to the receiving status information from the source via node Huo Qu Lost, reduce the possibility that source evolution Ji Zhan Lost in handoff procedure lose packet, reduction source via node returns to the bag quantity that cleared data of source evolution base station, save Radio Resource.

With said apparatus accordingly, the embodiment of the present invention additionally provides a kind of via node, as shown in figure 15, via node of the embodiment of the present invention, including：

Status information transmitting element 1501, the receiving status information for sending user equipment to source evolution base station；

Lost bags message reception units 1502, Lost bag message is sent for receiving by the source evolution base station；Lost loses data transmission unit 1503, during for Suo Shu Lost bags 1502 Jie Shou Lost bag message of message reception units, the packet that Gen loses according to Suo Shu Lost bags message to the source evolution base station Fa send Lost.

Further, the via node also includes：

Handover request transmitting element, for sending handover request to the source evolution base station；

Message sending unit is indicated, for sending switch indicating information to the source evolution base station；Switching confirms receiving unit, for receiving the Handover Request Acknowledge sent by the source evolution base station.Or, the via node also includes：

Measurement report transmitting element, the measurement report for sending the user equipment to the source evolution base station

Switching command receiving unit, for receiving the switching command sent by the source evolution base station. Further, Suo Shu Lost lose data transmission unit 1503 and specifically also included：

Sequence number obtains subelement, the sequence number for the packet that Huo Qu Lost lose Cong Suo Shu Lost bag message sinks subelement reception Lost bag message；

Lost loses data transmission sub-unit, sends the packet of Suo Shu Lost mistakes to the source evolution base station for obtaining the sequence number of subelement acquisition according to the sequence number.

Via node provided in an embodiment of the present invention, the receiving status information of user equipment is sent to source evolution base station, make source evolution base station stop remove Slow deposit described in user equipment packet after, the no Cun Lost of Shi can be determined according to the receiving status information Que of user equipment and lose packet, the via node sends Lost bags message to source evolution base station transmission packet according to source evolution base station, reduce the possibility that source evolution Ji Zhan Lost in handoff procedure lose packet, reduction source via node returns to the bag quantity that cleared data of source evolution base station, save Radio Resource.

With the above method, device accordingly, the embodiment of the present invention additionally provides a kind of switching processing system, as shown in figure 16, switching processing system of the embodiment of the present invention, including evolution base station and via node：The evolution base station is connected with least one via node；The evolution base station includes source evolution base station 1602 and target evolution base station 1603;The via node includes source via node 1601 and object relay node 1604;Wherein, the source evolution base station 1602, for it is determined that user equipment need switching when, or it is determined that the user equipment need switch after the specified moment, stop remove Slow deposit described in user equipment packet；And the receiving status information of the user equipment is obtained from the source via node 1601；When determining the packet that Cun Lost lose according to the receiving status information, the packet that Suo Shu Lost lose is obtained from the source via node 1601 according to receiving status information；

The source via node 1601, the receiving status information for sending user equipment to source evolution base station 1602；And the packet lost according to the Lost bags message of source evolution base station 1602 to the Fa Song Lost of source evolution base station 1602.

Further, the source evolution base station 1602, is additionally operable to send the packet of the user equipment and/or the reception state message of the user equipment to the target evolution base station 1603 or the object relay node 1604 according to the receiving status information； The target evolution base station 1603, for receiving the packet of the user equipment sent by the source evolution base station 1602 and/or the reception state message of the user equipment；

The object relay node 1604, for receiving the packet of the user equipment sent by the source evolution base station 1603 and/or the reception state message of the user equipment.

Switching processing system provided in an embodiment of the present invention, by source evolution base station when it is determined that user equipment needs switching, or it is determined that the user equipment needs the specified moment after switching, stop removing the packet that Slow deposits the middle user equipment received by source via node, and the receiving status information of the user equipment is obtained from source via node, when determining the packet that Cun Lost lose according to the receiving status information, the packet lost according to the receiving status information from the source via node Huo Qu Lost, reduce the possibility that source evolution Ji Zhan Lost in handoff procedure lose packet, reduction source via node returns to the bag quantity that cleared data of source evolution base station, save Radio Resource.

One of ordinary skill in the art will appreciate that realizing all or part of flow in above-described embodiment method, computer program is can be by instruct the hardware of correlation to complete, described program can be stored in a computer read/write memory medium, the program is upon execution, it may include such as the flow of the embodiment of above-mentioned each method.Wherein, described storage medium can be magnetic disc, CD, read-only memory（Read-Only Memory, ROM) or random access memory (Random Acces s Memory, RAM) etc..

It is described above; only embodiment of the invention, but protection scope of the present invention is not limited thereto, any one skilled in the art the invention discloses technical scope in; change or replacement can be readily occurred in, should be all included within the scope of the present invention.Therefore, protection scope of the present invention should be defined by scope of the claims.

Claims

Claims

1st, a kind of switching handling method, it is characterised in that including：

It is determined that user equipment need switching when, or it is determined that the user equipment need switch after the specified moment, stop remove Slow deposit described in user equipment packet；

The receiving status information of the user equipment is obtained from source via node；

When determining the packet that Cun Lost lose according to the receiving status information, the packet that Suo Shu Lost lose is obtained from the source via node according to the receiving status information.

2nd, switching handling method according to claim 1, it is characterised in that determine that the user equipment needs switching to include：

The handover request sent by the source via node is received, and determines that the user equipment needs switching according to the handover request；Or,

The measurement report of the user equipment sent by the source via node is received, and determines that the user equipment needs switching according to the measurement report.

3rd, switching handling method according to claim 1, it is characterised in that the determination user equipment needs the specified moment after switching to be：

Determine that the user equipment needs any instant between at the time of determining that the user equipment is allowed to switching at the time of switching, or, at the time of determining that the user equipment is allowed to switching, or, determine any instant to stopping between at the time of the packet of the source via node transmission user equipment at the time of user equipment needs to switch, or, at the time of stopping the packet to the source via node transmission user equipment；

It is described to be at the time of stop and send the packet of the user equipment to the source via node：At the time of determining that the user equipment is allowed to switching, or, at the time of Handover Request Acknowledge or switching command being sent to the source via node, or, at the time of determination at the time of the user equipment is allowed to switching between at the time of sending Handover Request Acknowledge or switching command to the source via node, or, at the time of receiving the receiving state report；Or, at the time of at the time of sending Handover Request Acknowledge or switching command to the source via node between at the time of the reception receiving state report. 4th, switching handling method according to claim 3, it is characterised in that determine that the user equipment is allowed to switching and included：

Determine that the user equipment is allowed to switching according to the access control result of execution；Or,

The Handover Request Acknowledge sent by destination node is received, and determines that the user equipment is allowed to switching according to the Handover Request Acknowledge；Or,

The switch indicating information sent by the source via node is received, and determines that the user equipment is allowed to switching according to the switch indicating information.

5th, switching handling method according to claim 1, it is characterised in that the receiving status information for obtaining the user equipment from the source via node includes：

Receive the receiving state report sent by the source via node；

The receiving status information of the user equipment is obtained from the receiving state report.

6th, switching handling method according to claim 1, it is characterised in that the packet for obtaining Suo Shu Lost mistakes from the source via node according to the receiving status information includes：

According to the receiving status information Que Ding Lost mistake packet；

To the source via node Fa send Lost bag message, Suo Shu Lost bags message carry the Que Ding Lost mistakes packet sequence number；

Receive the packet that the Suo Shu Lost sent by the source via node lose.

7th, the switching handling method according to claim 1 or 2 or 3 or 6 or 7, it is characterised in that the receiving status information includes：

The sequence number for one or more new packets that the source via node is finally sent, and the sequence number of packet that is properly received is not confirmed by the user equipment；Or,

The sequence number for one or more new packets that the source via node is not sent at first, and the sequence number of packet that is properly received is not confirmed by the user equipment；Or,

The sequence number for one or more new packets that the source via node is finally sent；Or, the sequence number for one or more new packets that the source via node is not sent at first；

It is described according to the receiving status information Que Ding Lost mistake packet include： According to it is described not by the user equipment confirm the sequence number of packet and Slow that are properly received deposit described in user equipment packet sequence number, determine that Slow is non-existent in depositing and the packet that is properly received is not confirmed by the user equipment, the determination is not confirmed into the packet that the packet Zuo Wei Lost being properly received lose by the user equipment；Or,

According to the sequence number of the new packet finally sent, and the sequence number of the packet of the user equipment that Slow is deposited, determine sequence number and the at first packet sequence number of packet that Slow deposit between of the sequence number in the new packet finally sent, the packet that the packet Zuo Wei Lost of the determination are lost；Or,

According to the sequence number of the new packet not sent at first, and the sequence number of the packet of the user equipment that Slow is deposited, determine the sequence number or the sequence number and the packet of the sequence number between the sequence number for the packet that Slow is deposited at first in the new packet not sent at first for the new packet not sent at first described in Serial No., the packet that the packet Zuo Wei Lost of the determination are lost.

8th, switching handling method according to claim 1, it is characterised in that also include：When determining to have unnecessary packet according to the receiving status information, according to the receiving status information remove Slow deposit described in unnecessary packet.

9th, switching handling method according to claim 1, it is characterised in that also include：The packet of the user equipment and/or the reception state message of the user equipment are sent to the destination node according to the receiving status information, the reception state message is the receiving state report for the user equipment that the source via node is sent, or, the reception state message carries the sequence number or the sequence number for the one or more new packets not sent at first for one or more new packets that the source via node is finally sent.

10th, switching handling method according to claim 1, it is characterised in that also include：Bi-casting/Measurement Request is sent to gateway by mobility management entity, the bi-casting/Measurement Request is used to ask the gateway to send packet to target evolution base station and source evolution base station bi-casting/multicast；Bi-casting/the Measurement Request forwarded by the mobility management entity is received to confirm；

Receive the packet sent by the gateway bi-casting/multicast； Determine that unicast sends packet according to bi-casting/multicast mark；

According to the receiving status information, the unicast for not confirming to be properly received by the user equipment or not sent to the user equipment is sent to the destination node and sends packet, and/or the reception state message of the user equipment is sent to the destination node, the reception state message is the receiving state report for the user equipment that the source via node is sent, or, the reception state message carries the sequence number or the sequence number for the one or more new packets not sent at first for one or more new packets that the source via node is finally sent.

11st, the switching handling method according to claim 1, it is characterised in that the packet is point a Service Data Unit or wireless link control protocol data cell processed；

The Serial No. PDCP Service Data Unit sequence number or PDCP protocol data unit sequence number or wireless spread-spectrum technology Service Data Unit sequence number or wireless link control protocol data cell sequence number of the packet.

12nd, a kind of switching handling method, it is characterised in that including：

The receiving status information of user equipment is sent to source evolution base station；

When receiving by source evolution base station transmission Lost bag message, the packet that Gen loses according to Suo Shu Lost bags message to the source evolution base station Fa send Lost.

13rd, switching handling method according to claim 12, it is characterised in that it is described to source evolution base station send user equipment receiving status information the step of before include：

Handover request is sent to the source evolution base station；Or,

Handover request is sent to the source evolution base station, after the Handover Request Acknowledge sent by the source evolution base station is received, switch indicating information is sent to the source evolution base station；Or,

The measurement report of the user equipment is sent to the source evolution base station, and receives the switching command sent by the source evolution base station.

14th, switching handling method according to claim 12, it is characterised in that described to include to source evolution base station transmission receiving status information： Receiving state report is sent to the source evolution base station, the receiving state report carries the receiving status information of the user equipment；Or,

Handover request is sent to the source evolution base station, the handover request message carries the receiving status information of the user equipment.

15th, the switching handling method according to any one of claim 12 to 14, it is characterised in that the receiving status information includes：

The sequence number for one or more new packets that the source via node is finally sent, and the sequence number of packet that is properly received is not confirmed by the user equipment；Or,

The sequence number for one or more new packets that the source via node is not sent at first, and the sequence number of packet that is properly received is not confirmed by the user equipment；Or,

The sequence number for one or more new packets that the source via node is finally sent；Or, the sequence number for one or more new packets that the source via node is not sent at first.

16th, switching handling method according to claim 15, it is characterised in that the Gen includes according to Suo Shu Lost bags message to the source evolution base station Fa send Lost packets lost：

The sequence number for the packet that Huo Qu Lost lose Cong Suo Shu Lost bag message；

Gen sends the packet that Suo Shu Lost lose according to the sequence number of the Suo Shu Lost packets lost to the source evolution base station.

17th, a kind of base station, it is characterised in that including：

Switch determining unit, for determining whether user equipment needs switching；

Stop clearing cell, for when the switching determining unit determines that the user equipment needs switching, or the specified moment after the switching determining unit determines that the user equipment needs to switch, stop removing Slow deposit described in user equipment packet；

Information acquisition unit, the receiving status information for obtaining the user equipment from source via node；Lost loses data determination unit, and the receiving status information Que for being obtained according to described information acquiring unit determines the packet that the no Cun Lost of Shi lose；

Lost loses data capture unit, and data determination unit is lost for Suo Shu Lost When, the receiving status information obtained according to described information acquiring unit obtains the packet that Suo Shu Lost lose from the source via node.

18th, base station according to claim 17, it is characterised in that the switching determining unit includes：Handover request receiving subelement, for receiving the handover request sent by the source via node；Handover request judgment sub-unit, the handover request for being received according to the handover request receiving subelement determines that the user equipment needs switching.

19th, base station according to claim 17, it is characterised in that the switching determining unit includes：Measurement report receiving subelement, the measurement report for receiving the user equipment sent by the source via node；

Measurement report judgment sub-unit, the measurement report for being received according to the measurement report receiving subelement determines that the user equipment needs switching.

20th, base station according to claim 17, it is characterised in that described information acquiring unit includes：Status report reception subelement, for receiving the receiving state report sent by the source via node；State information acquisition subelement, the receiving status information for obtaining the user equipment in the receiving state report that is received from the status report reception subelement.

21st, base station according to claim 17, it is characterised in that Suo Shu Lost, which lose data capture unit, to be included：

Lost lose data determination subelement, for according to the receiving status information Que Ding Lost mistake packet；Lost bag message transmission sub-units, for the source via node Fa send Lost bag message, Suo Shu Lost bags message carry Suo Shu Lost lose data determination subelement Que Ding Lost mistakes packet sequence number；

Lost loses data receiver subelement, for receiving the packet that the Suo Shu Lost sent by the source via node lose.

22nd, base station according to claim 17, it is characterised in that also include：

Redundant data determining unit, the receiving status information for being obtained according to described information acquiring unit determines whether there is unnecessary packet；

Slow deposits clearing cell, for the redundant data determining unit determine there is unnecessary packet when, The receiving status information obtained according to described information acquiring unit remove Slow deposit described in unnecessary packet.

23rd, base station according to claim 17, it is characterised in that also include：

Data transmission unit, the receiving status information for being obtained according to described information acquiring unit sends the packet of the user equipment to destination node；

Status message transmitting element, the receiving status information for being obtained according to described information acquiring unit sends the reception state message of the user equipment to the destination node.

24th, base station according to claim 23, it is characterised in that also include：

Request transmitting unit is sent, for sending bi-casting/Measurement Request to gateway by mobility management entity, the bi-casting/Measurement Request is used to ask the gateway to send packet to target evolution base station and source evolution base station bi-casting/multicast；

Send and confirm receiving unit, confirm for receiving the bi-casting forwarded by the mobility management entity/Measurement Request；

New data receiving unit, for receiving the packet sent by the gateway bi-casting/multicast；The data transmission unit includes：

Unicast data determination subelement, for determining that unicast sends packet according to bi-casting/multicast mark；Data sub-element is transmitted, the receiving status information for being obtained according to described information acquiring unit sends the unicast for not confirming to be properly received by the user equipment or not sent to the user equipment to the destination node and sends packet.

25th, a kind of via node, it is characterised in that including：

Status information transmitting element, the receiving status information for sending user equipment to source evolution base station；Lost bag message reception units, Lost bag message is sent for receiving by the source evolution base station；Lost loses data transmission unit, during for Suo Shu Lost bag message reception units Jie Shou Lost bag message, the packet that Gen loses according to Suo Shu Lost bags message to the source evolution base station Fa send Lost.

26th, via node according to claim 25, it is characterised in that the data transmission unit includes： Sequence number obtains subelement, the sequence number for the packet that Huo Qu Lost lose Cong Suo Shu Lost bags message reception units reception Lost bag message；

Lost loses data transmission sub-unit, sends the packet of Suo Shu Lost mistakes to the source evolution base station for obtaining the sequence number of subelement acquisition according to the sequence number.