CN104509042B

CN104509042B - A kind of data processing method, base station and user equipment

Info

Publication number: CN104509042B
Application number: CN201280001992.9A
Authority: CN
Inventors: 黄曲芳; 常俊仁; 张宏平
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2012-08-03
Filing date: 2012-08-03
Publication date: 2017-11-17
Anticipated expiration: 2032-08-03
Also published as: CN104509042A; WO2014019240A1

Abstract

The present invention provides a kind of data processing method, base station and user equipment, and the data processing method includes：When user equipment (UE) switches from source base station to target BS, the packet that the source base station will not confirmed in descending conventional PDCP window of sequence numbers by the UE, sent with the remaining data bag in downbound expansion PDCP window of sequence numbers to the target BS, the remaining data in the downbound expansion PDCP window of sequence numbers includes the packet in the descending conventional PDCP window of sequence numbers；Wherein, the downbound expansion PDCP window of sequence numbers includes the descending conventional PDCP window of sequence numbers, and the downbound expansion PDCP window of sequence numbers is identical with the original position of the descending conventional PDCP window of sequence numbers.When the data processing method can avoid switching to the target BS using conventional PDCP SN from the source base station of the PDCP SN using extension in UE the problem of existing data-bag lost.

Description

A kind of data processing method, base station and user equipment

Technical field

The invention belongs to communication technical field, more particularly to a kind of data processing method, base station and user equipment.

Background technology

The GSM of a new generation, such as LTE（Long Term Evolution, Long Term Evolution）, data can be lifted Transmission speed, reach more preferable Consumer's Experience.What LTE was typically made up of Access Layer and Non-Access Stratum, in most cases, access Layer provides the function of sequentially submitting.Wherein sequentially submit and refer to that the Access Layer of sender receives bag from upper strata, after transmission, with Identical order passes to these bags the high level of recipient, referring to Fig. 1, the Access Layer and the sequence on upper strata that are provided for prior art The schematic diagram submitted.

Access Layer is subdivided into PDCP（Packet Data Convergence Protocol, packet data convergence association View）、RLC（Radio Link Control, wireless chain control layer agreement）、MAC（Medium Access Control, medium Access-control protocol）, several levels such as physical layer.Under normal circumstances, sequentially submitting function is provided by rlc layer.Sender RLC will each wrap plus numbering, give MAC layer processing, if there occurs unrest in transmitting procedure for MAC layer and physical layer Sequence, then the RLC of recipient the bag first received can be stored, after other bags reach, then be submitted to PDCP layers in order. Referring to Fig. 2, the schematic diagram sequentially submitted of rlc layer when switching for the base station that prior art provides.

Sender have issued 5 bags altogether, and recipient has had successfully received 1,3, No. 5 bag, and 2, No. 4 bags are not yet successfully received Arrive.No. 1 bag is delivered upper strata by the Access Layer of recipient, and 3, No. 5 Bao Ze are stored in the caching of oneself, wait 2, No. 4 bag arrive Come.If first receiving No. 2 bags, the Access Layer of recipient will submit 2, No. 3 bags respectively to upper strata in order, and continue waiting for 4 Number bag, after No. 4 bags arrive, then submits 4, No. 5 bags respectively to upper strata in order；If first receiving No. 4 bags, the Access Layer of debit will No. 4 bags are stored in caching, continue waiting for No. 2 bags, after No. 2 bags arrive, submit 2,3,4, No. 5 respectively to upper strata in order Bag.

Under normal circumstances, RLC is ensured that and sequentially submitted, but when switching in base station, because RLC will be reset, The data that RLC can be caused to store

Bag all empties, so RLC's sequentially submits function just not revival, at this moment just needs to use PDCP sequentially Submit function.The bag that the RLC of recipient first receives oneself is first sent to PDCP, then the caching of oneself is emptied.After switching, connect The PDCP of debit is continued to wrap, then these bags are sequentially submitted to upper strata.

Because wave point is a transmission bottleneck in radio communication, in order to reduce the re-transmission eated dishes without rice or wine before and after switching, lifting Air-interface efficiency, 3GPP have used Data Forwarding（Dataforwarding）Mode, i.e., source base station PDCP layers are stored some Bag is transmitted to target BS by X2 interface, and so, target BS has just restored the state of source base station in advance, and these pass through X2 interface The bag being transmitted through, is avoided the need in air interface transmission.

In existing Data Forwarding method, it is desirable to which source base station and target BS use the PDCP sequence numbers of equal length（PDCP SN）, meanwhile, PDCP window size is also to be determined by PDCP sequence number length.In existing system, most long PDCP sequence number is 12 Position, correspondingly, PDCP window size is 2^(12-1）, that is, can have up to 2048 bags and be stored in PDCP caching, exceed 2048, then necessarily have two bag PDCP SN it is identical, None- identified.

In order to adapt to the demand of different business model, 3GPP has agreed to extend PDCPSN, i.e. base station since the 11st edition The PDCP SN of extension can be supported.If user equipment（UE）Switched to from the base station of the PDCPSN using extension and do not support to extend PDCP SN base station when, the problem of data-bag lost be present in existing Data Forwarding method.

The content of the invention

The embodiment of the present invention provides a kind of data processing method, is carried out with solving user equipment between the base station of different editions During switching the problem of existing data-bag lost.

In a first aspect, the data processing method includes：

When user equipment (UE) switches from source base station to target BS, the source base station converges descending conventional packet data Remainder in the packet not confirmed in agreement PDCP window of sequence numbers by the UE, and downbound expansion PDCP window of sequence numbers According to bag transmission to the target BS, the remaining data in the downbound expansion PDCP window of sequence numbers includes described descending Packet in conventional PDCP window of sequence numbers；

Wherein, the downbound expansion PDCP window of sequence numbers includes the descending conventional PDCP window of sequence numbers, under described Row extension PDCP window of sequence numbers is identical with the original position of the descending conventional PDCP window of sequence numbers.

In the first possible implementation of first aspect, in addition to：

The source base station sends the packet that the source base station in uplink conventional PDCP window of sequence numbers has received to institute State target BS；With

The source base station abandons the remaining data bag in uplink extended PDCP window of sequence numbers, the uplink extended PDCP sequences Remaining data in row number window includes the packet in the uplink conventional PDCP window of sequence numbers；

Wherein, the uplink extended PDCP window of sequence numbers includes the uplink conventional PDCP window of sequence numbers, it is described on Row extension PDCP window of sequence numbers is identical with the original position of the uplink conventional PDCP window of sequence numbers.

With reference to the possible implementation of the first of first aspect or first aspect, second in first aspect may Implementation in, the packet that the source base station will not be confirmed by the UE in the descending conventional PDCP window of sequence numbers is sent out The target BS is delivered to, is specifically included：

The source base station by the descending conventional PDCP window of sequence numbers not by the PDCP of the UE packets confirmed Sequence number is converted into the sequence number for the PDCP sequence number length that the target BS uses；

The source base station sends what is do not confirmed in the descending conventional PDCP window of sequence numbers by UE to the target BS The sequence number for the PDCP sequence number length that PDCP Service Data Units SDU corresponding to packet and the target BS use.

With reference to second of possible implementation of first aspect, in the third possible implementation, in addition to：

The source base station changes the PDCP sequence numbers of the remaining data bag in the descending conventional PDCP window of sequence numbers The sequence number of the PDCP sequence number length used into the target BS, and by the descending conventional PDCP window of sequence numbers The sequence number for the PDCP sequence number length that PDCP SDU corresponding to remaining data bag and the target BS use is sent to described Target BS；

Wherein, the remaining data in the descending conventional PDCP window of sequence numbers includes the descending conventional PDCP sequences The packet not confirmed by the UE in row number window.

With reference to the possible implementation of the first of first aspect or first aspect, in the 4th kind of possible implementation In, the source base station will not be sent to the mesh in the descending conventional PDCP window of sequence numbers by the UE packets confirmed Base station is marked, is specifically included：

The source base station will not remove the source in the conventional PDCP window of sequence numbers by the UE packets confirmed The PDCP sequence numbers of base station distribution, and corresponding to the packet that will not confirmed in the conventional PDCP window of sequence numbers by the UE PDCP SDU are sent to the target BS.

With reference to the 4th kind of possible implementation of first aspect, in the 5th kind of possible implementation of first aspect In, in addition to：

Remaining data bag in the descending conventional PDCP window of sequence numbers is removed the source base station point by the source base station The PDCP sequence numbers matched somebody with somebody, and PDCP SDU corresponding to the remaining data bag in the descending conventional PDCP window of sequence numbers are sent To the target BS；

Second aspect, the data processing method include

After user equipment (UE) switches to target BS by source base station, the UE is after handover by uplink conventional grouped data In the packet not confirmed in convergence protocol PDCP window of sequence numbers by the source base station, and uplink extended PDCP window of sequence numbers Remaining data bag send to the target BS, the remaining data in the uplink extended PDCP window of sequence numbers includes Packet in the uplink conventional PDCP window of sequence numbers；

The uplink extended PDCP window of sequence numbers includes the uplink conventional PDCP window of sequence numbers, the uplink extended PDCP window of sequence numbers is identical with the original position of the uplink conventional PDCP window of sequence numbers.

In the first possible implementation of second aspect, in addition to：

The UE abandons the remaining data bag in downbound expansion PDCP window of sequence numbers, the downbound expansion PDCP sequence numbers Remaining data in window includes the packet in the descending conventional PDCP window of sequence numbers；

With reference to the possible implementation of the first of second aspect or second aspect, second in second aspect may Implementation in, the packet that the UE will not be confirmed by the source base station in the uplink conventional PDCP window of sequence numbers is sent out The target BS is delivered to, is specifically included：

The UE by the uplink conventional PDCP window of sequence numbers not by source base station confirm packet PDCP sequences Number it is converted into the sequence number for the PDCP sequence number length that the target BS uses；

The sequence number for the PDCP sequence number length that the UE uses according to the target BS reconfigures described up PDCP Service Data Unit PDU corresponding to the packet not confirmed in PDCP window of sequence numbers by source base station, and by described in again The PDCP PDU of construction are sent to the target BS.

With reference to second of possible implementation of second aspect, in the third possible implementation of second aspect In, in addition to：

The PDCP sequence numbers of remaining data bag in the uplink conventional PDCP window of sequence numbers are converted into institute by the UE The sequence number for the PDCP sequence number length that target BS uses is stated, the PDCP sequence number length used according to the target BS Sequence number reconfigures PDCP PDU corresponding to remaining data bag in the uplink conventional PDCP window of sequence numbers, and will described in The PDCP PDU reconfigured are sent to the target BS；

Wherein, the remaining data in the uplink conventional PDCP window of sequence numbers includes the conventional PDCP sequence numbers The packet not confirmed by the source base station in window.

With reference to the third possible implementation of second possible implementation or second aspect of second aspect, In the 4th kind of possible implementation of second aspect, in addition to：

The PDCP sequence numbers of remaining data bag in the uplink extended PDCP window of sequence numbers are converted into institute by the UE The sequence number for the PDCP sequence number length that target BS uses is stated, the PDCP sequence number length used according to the target BS The remaining data bag that sequence number is reconfigured in the uplink extended PDCP window of sequence numbers corresponds to PDCP PDU, and will be described heavy The PDCP PDU of neotectonics are sent to the target BS；

Wherein, the remaining data in the uplink extended PDCP window of sequence numbers includes the conventional PDCP sequence numbers Packet in window.

With reference to the possible implementation of the first of second aspect or second aspect, in the 5th kind of possibility of second aspect Implementation in, the packet that the UE will not be confirmed by the source base station in the uplink conventional PDCP window of sequence numbers is sent out The target BS is delivered to, is specifically included：

The UE will not remove institute in the uplink conventional PDCP window of sequence numbers by the packet that the source base station confirms The PDCP sequence numbers of UE distribution are stated, and the PDCP sequence numbers length used according to the target BS is the uplink conventional again The allocation of packets PDCP sequence numbers that are not confirmed in PDCP window of sequence numbers by the source base station, redistributed using described It is corresponding that PDCP sequence numbers reconfigure the packet not confirmed in the uplink conventional PDCP window of sequence numbers by the source base station PDCP PDU, and the PDCP PDU reconfigured are sent to the target BS.

With reference to the 5th kind of possible implementation of second aspect, in the 6th kind of possible implementation of second aspect, Also include：

The UE removes the remaining data bag in the uplink conventional PDCP window of sequence numbers PDCP of the UE distribution Sequence number, and the PDCP sequence numbers length used according to the target BS is the uplink conventional PDCP window of sequence numbers again Interior remaining data bag distribution PDCP sequence numbers, the uplink conventional is reconfigured using the PDCP sequence numbers redistributed PDCP PDU corresponding to remaining data bag in PDCP window of sequence numbers, and the PDCP PDU reconfigured are sent to institute State target BS；

Wherein, the remaining data in the uplink conventional PDCP window of sequence numbers includes the uplink conventional PDCP sequences The packet not confirmed by the source base station in row number window.

With reference to the 6th kind of possible implementation of the 5th kind of possible implementation or second aspect of second aspect, In the 7th kind of possible implementation of second aspect, in addition to：

The UE removes the remaining data bag in the uplink extended PDCP window of sequence numbers PDCP of the UE distribution Sequence number, and the PDCP sequence numbers length used according to the target BS is the uplink extended PDCP window of sequence numbers again Interior remaining data bag distribution PDCP sequence numbers, and the PDCP sequence numbers redistributed described in use reconfigure the up expansion Open up PDCP window of sequence numbers in remaining data bag corresponding to PDCP PDU, and by the PDCP PDU reconfigured send to The target BS；

Wherein, the remaining data in the uplink extended PDCP window of sequence numbers includes the uplink conventional PDCP sequences Packet in row number window.

The third aspect, the base station include：

Transmitting element, for when user equipment (UE) switches from the base station to target BS, by descending conventional packet count According to the packet not confirmed in convergence protocol PDCP window of sequence numbers by the UE, and in downbound expansion PDCP window of sequence numbers Remaining data bag is sent to the target BS, and the remaining data in the downbound expansion PDCP window of sequence numbers includes institute State the packet in descending conventional PDCP window of sequence numbers；

In the first possible implementation of the third aspect, the transmitting element is additionally operable to the uplink conventional The packet that the base station has received in PDCP window of sequence numbers is sent to the target BS；

The base station also includes：

Discarding unit, for abandoning the remaining data bag in the uplink extended PDCP window of sequence numbers, the up expansion The remaining data opened up in PDCP window of sequence numbers includes the packet in the uplink conventional PDCP window of sequence numbers；

It is possible in second of the third aspect with reference to the possible implementation of the first of the third aspect or the third aspect In implementation, the base station also includes：

Converting unit, for by the descending conventional PDCP window of sequence numbers not by the UE packets confirmed PDCP sequence numbers are converted into the sequence number for the PDCP sequence number length that the target BS uses；

The transmitting element, be additionally operable to the target BS send in the descending conventional PDCP window of sequence numbers not by The PDCP sequence numbers length that PDCP Service Data Units SDU corresponding to the packet that UE confirms and the target BS obtained use The sequence number of degree.

With reference to second of possible implementation of the third aspect, in the third aspect in the third possible implementation, The converting unit is additionally operable to the PDCP sequence numbers conversion of the remaining data bag in the descending conventional PDCP window of sequence numbers The sequence number of the PDCP sequence number length used into the target BS；

The transmitting element, it is additionally operable to corresponding to the remaining data bag in the descending conventional PDCP window of sequence numbers The sequence number for the PDCP sequence number length that PDCP SDU and the target BS obtained use is sent to the target BS；

With reference to the possible implementation of the first of first aspect or first aspect, in the 4th kind of realization of the third aspect In mode, the base station also includes：

Stripping unit, it is described for will not removed in the conventional PDCP window of sequence numbers by the UE packets confirmed The PDCP sequence numbers of source base station distribution；

The transmitting element is additionally operable to the packet pair that will not confirmed in the conventional PDCP window of sequence numbers by the UE The PDCP SDU answered are sent to the target BS.

With reference to the 4th kind of possible implementation of the third aspect, in the 5th kind of possible implementation of the third aspect, The stripping unit is additionally operable to the remaining data bag in the descending conventional PDCP window of sequence numbers removing the source base station point The PDCP sequence numbers matched somebody with somebody；

The transmitting element is additionally operable to corresponding to the remaining data bag in the descending conventional PDCP window of sequence numbers PDCP SDU are sent to the target BS；

Fourth aspect, the user equipment include：

Transmitting element, for after the user equipment switches to target BS by source base station, by uplink conventional PDCP sequences Remaining data bag hair in the packet not confirmed in row number window by the source base station, and uplink extended PDCP window of sequence numbers Deliver to the target BS, the remaining data in the uplink extended PDCP window of sequence numbers includes the uplink conventional Packet in PDCP window of sequence numbers；

In the first possible implementation of fourth aspect, the user equipment also includes：

Discarding unit, for abandoning the remaining data bag in downbound expansion PDCP window of sequence numbers, the downbound expansion Remaining data in PDCP window of sequence numbers includes the packet in the descending conventional PDCP window of sequence numbers；

With reference to the possible implementation of the first of fourth aspect or fourth aspect, second in fourth aspect may Implementation in, in addition to：

Converting unit, for the packet that will do not confirmed by source base station in the uplink conventional PDCP window of sequence numbers PDCP sequence numbers are converted into the sequence number for the PDCP sequence number length that the target BS uses；

First structural unit, for the sequence number weight of the PDCP sequence number length used according to the target BS of acquisition PDCP Service Data Units corresponding to the packet not confirmed described in neotectonics in up PDCP window of sequence numbers by source base station PDU；

The transmitting element, it is additionally operable to send the PDCP PDU reconfigured to the target BS.

With reference to second of possible implementation of fourth aspect, in fourth aspect in the third possible implementation, The converting unit is additionally operable to the PDCP sequence numbers conversion of the remaining data bag in the uplink conventional PDCP window of sequence numbers The sequence number of the PDCP sequence number length used into the target BS；

First structural unit, it is additionally operable to the sequence of PDCP sequence number length used according to the target BS of acquisition Row number reconfigures PDCP PDU corresponding to remaining data bag in the uplink conventional PDCP window of sequence numbers；

The transmitting element, it is additionally operable to send the PDCP PDU reconfigured to the target BS；

With reference to the third possible implementation of second possible implementation or fourth aspect of fourth aspect, In the 4th kind of possible implementation of fourth aspect,

The converting unit is additionally operable to the PDCP sequences of the remaining data bag in the uplink extended PDCP window of sequence numbers Row number is converted into the sequence number for the PDCP sequence number length that the target BS uses；

First structural unit, it is additionally operable to the sequence of PDCP sequence number length used according to the target BS of acquisition The remaining data bag that row number is reconfigured in the uplink extended PDCP window of sequence numbers corresponds to PDCP PDU；

With reference to the possible implementation of the first of fourth aspect or fourth aspect, in the 5th kind of possibility of fourth aspect Implementation in, the user equipment also includes：

Weight subdivision, for the packet that will not confirmed in the uplink conventional PDCP window of sequence numbers by the source base station Remove the PDCP sequence numbers of the UE distribution, and the PDCP sequence numbers length used according to the target BS is on described again The allocation of packets PDCP sequence numbers not confirmed in the conventional PDCP window of sequence numbers of row by the source base station；

Second structural unit, the PDCP sequence numbers for being redistributed according to acquisition reconfigure described up normal PDCPPDU corresponding to the packet not confirmed in rule PDCP window of sequence numbers by the source base station；

With reference to the 5th kind of possible implementation of fourth aspect, in the 6th kind of possible implementation of fourth aspect In, the heavy subdivision, it is additionally operable to the remaining data bag in the uplink conventional PDCP window of sequence numbers removing the UE points The PDCP sequence numbers matched somebody with somebody, and the PDCP sequence numbers length used according to the target BS is the uplink conventional PDCP sequences again Remaining data bag distribution PDCP sequence numbers in row number window；

Second structural unit, the PDCP sequence numbers for being additionally operable to redistribute according to acquisition reconfigure described PDCP PDU corresponding to remaining data bag in uplink conventional PDCP window of sequence numbers；

With reference to the 6th kind of possible implementation of the 5th kind of possible implementation or fourth aspect of fourth aspect, In the 7th kind of possible implementation of fourth aspect, the heavy subdivision, it is additionally operable to the uplink extended PDCP sequence numbers Remaining data bag in window removes the PDCP sequence numbers of the UE distribution, and the PDCP sequences used according to the target BS Number length distributes PDCP sequence numbers for the remaining data bag in the uplink extended PDCP window of sequence numbers again；

Second structural unit, the PDCP sequence numbers for being additionally operable to redistribute according to acquisition reconfigure described PDCP PDU corresponding to remaining data bag in uplink extended PDCP window of sequence numbers；

As can be seen that the embodiment of the present invention switches in UE from the source base station of the PDCP SN using extension from such scheme During to target BS using conventional PDCP SN, source base station will not confirmed in descending conventional PDCP window of sequence numbers by UE Remaining data bag in packet and downbound expansion PDCP window of sequence numbers, which is sent to the target BS, to be sent to target BS, The packet that UE will not confirmed in uplink conventional PDCP window of sequence numbers by source base station, and in uplink extended PDCP window of sequence numbers Remaining data bag send to target BS, so as to avoid switching to use from the source base station of the PDCP SN using extension in UE During conventional PDCP SN target BS the problem of existing data-bag lost.

Brief description of the drawings

Technical scheme in order to illustrate the embodiments of the present invention more clearly, below will be to embodiment or description of the prior art In the required accompanying drawing used be briefly described, it should be apparent that, drawings in the following description be only the present invention some Embodiment, for those of ordinary skill in the art, without having to pay creative labor, can also be according to these Accompanying drawing obtains other accompanying drawings.

The schematic diagram that Fig. 1 is the Access Layer of prior art offer and the sequence on upper strata is submitted；

The schematic diagram sequentially submitted of rlc layer when Fig. 2 is the base station switching that prior art provides；

Fig. 3 is the implementation process figure of data processing method provided in an embodiment of the present invention；

Fig. 4 is the implementation process figure for the data processing method that another embodiment of the present invention provides；

Fig. 5 is the implementation process figure for the data processing method that another embodiment of the present invention provides；

Fig. 6 is the interaction implementation process figure of data processing method provided in an embodiment of the present invention；

Fig. 7 is the schematic diagram of the processing method for the downlink data that one embodiment of the invention provides；

Fig. 8 is the schematic diagram of the processing method for the upstream data that another embodiment of the present invention provides；

Fig. 9 is the implementation process figure for the Data Forwarding method that another embodiment of the present invention provides；

Figure 10 is the schematic diagram of the processing method for the downlink data that another embodiment of the present invention provides；

Figure 11 is the implementation process figure for the data processing method that another embodiment of the present invention provides；

Figure 12 is the implementation process figure of another embodiment of the present invention data processing method；

Figure 13 is the processing schematic diagram for the downlink data that another embodiment of the present invention provides；

Figure 14 is the structured flowchart of base station provided in an embodiment of the present invention；

Figure 15 is the structured flowchart of user equipment provided in an embodiment of the present invention；

Figure 16 is the composition structure of base station provided in an embodiment of the present invention；

Figure 17 is the composition structure of user equipment provided in an embodiment of the present invention.

Embodiment

In order to make the purpose , technical scheme and advantage of the present invention be clearer, it is right below in conjunction with drawings and Examples The present invention is further elaborated.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, and It is not used in the restriction present invention.

In order to illustrate technical solutions according to the invention, illustrated below by specific embodiment.Following each realities Apply example and be applied to following scene：UE from source base station switch to target BS when, source base station uses the PDCP SN of extension, and mesh Mark base station and use conventional PDCP SN.For convenience of description, in follow-up explanation, with the PDCP SN of source base station length For 14, exemplified by the PDCP SN of target BS length is 13.

Fig. 3 shows the implementation process of the method for the data processing that one embodiment of the invention provides, the execution master of this method Body is source base station, and details are as follows：

S101, when user equipment (UE) switches from source base station to target BS, source base station is by descending conventional PDCP sequence numbers The packet not confirmed in window by UE, and remaining data bag in downbound expansion PDCP window of sequence numbers are sent to target base Stand.Remaining data wherein in downbound expansion PDCP window of sequence numbers includes the number in descending conventional PDCP window of sequence numbers According to bag.

In the present embodiment, when source base station receives UE measurement report, and according to the measurement report determine UE need into When row base station switches, source base station determines the origin identification of uplink conventional PDCP window of sequence numbers and descending conventional PDCP sequence numbers window The origin identification of mouth.The origin identification of wherein uplink conventional PDCP window of sequence numbers refers to that source base station does not receive in upstream data First packet mark.The origin identification of descending conventional PDCP window of sequence numbers is that source base station passes to UE in downlink data Send and not by the mark of UE first packet confirmed.The wherein PDCP SN for being identified as packet of packet.

Preferably, when UE switches from source base station to target BS, source base station is by uplink conventional PDCP window of sequence numbers Origin identification and the origin identification of descending conventional PDCP window of sequence numbers inform UE.Source base station can in the following manner in Any one is by the origin identification of uplink conventional PDCP window of sequence numbers and the origin identification of descending conventional PDCP window of sequence numbers Inform UE：Source base station has the origin identification of uplink conventional PDCP window of sequence numbers and descending in switching command to UE is sent The origin identification of conventional PDCP window of sequence numbers, or source base station are up by MAC layer signaling or other bottom signaled UE The origin identification of the origin identification of conventional PDCP window of sequence numbers and descending conventional PDCP window of sequence numbers.

Preferably, this method also includes：

Source base station determines descending conventional PDCP window of sequence numbers according to the origin identification of descending conventional PDCP window of sequence numbers Border and downbound expansion PDCP window of sequence numbers border；Source base station is according to the starting mark of uplink conventional PDCP window of sequence numbers Know the border for determining uplink conventional PDCP window of sequence numbers and the border of uplink extended PDCP window of sequence numbers.

Wherein downbound expansion PDCP window of sequence numbers includes descending conventional PDCP window of sequence numbers, downbound expansion PDCP sequences Number window is identical with the original position of descending conventional PDCP window of sequence numbers.Uplink extended PDCP window of sequence numbers includes up normal Advise the original position phase of PDCP window of sequence numbers, uplink extended PDCP window of sequence numbers and uplink conventional PDCP window of sequence numbers Together.

Wherein uplink conventional PDCP window of sequence numbers and descending conventional PDCP window of sequence numbers refers to according to conventional PDCP SN Length determine window.Uplink extended PDCP window of sequence numbers and downbound expansion PDCP window of sequence numbers refer to according to extension The window that PDCP SN length determines.It is illustrated below：

When conventional PDCP SN length is 13, when the PDCP SN of extension length is 14, then uplink conventional PDCP The size of window of sequence numbers and descending conventional PDCP window of sequence numbers is 2^(13-1）=4096, and uplink extended PDCP sequence numbers The size of window and downbound expansion PDCP window of sequence numbers is 2^（14-1)=8192.

Preferably, the packet that source base station will not confirmed in descending conventional PDCP window of sequence numbers by UE, and descending expansion Remaining data bag in exhibition PDCP window of sequence numbers is sent to target BS by X2 interface.

Preferably, source base station will not be sent to target in descending conventional PDCP window of sequence numbers by the UE packets confirmed The detailed process of base station is as follows：

Source base station will not carry PDCPSN by the packet that UE confirms in descending conventional PDCP window of sequence numbers and be connect by X2 Mouth is sent to target BS.The PDCP SN that the packet not confirmed in wherein descending conventional PDCP window of sequence numbers by UE carries To be converted into the PDCPSN of the PDCP SN length of target BS.Its detailed process is as follows：

Source base station will be converted into descending conventional PDCP window of sequence numbers by the PDCP sequence numbers of the UE packets confirmed The sequence number for the PDCP sequence number length that target BS uses；

Source base station is sent to target BS corresponding to the packet not confirmed in descending conventional PDCP window of sequence numbers by UE The sequence number for the PDCP sequence number length that PDCP Service Data Units SDU and target BS use.

In the present embodiment, source base station is using in the upper-layer protocol head outside PDCP SDU（Such as GTP heads）Carry target The PDCP for the PDCP sequence number length that the PDCP SN for the PDCP sequence number length that base station uses mode uses target BS SN is sent to target BS.So so that by source base station send in the descending conventional PDCP window of sequence numbers of target BS not The PDCP SN for the PDCP sequence number length that target BS uses are carried by the UE packets confirmed.It is illustrated below：

Assuming that the PDCP SN of source base station length is 14, the PDCP SN of target BS length is 13, then source base Stand first will not be converted into 13 in descending conventional PDCP window of sequence numbers by the PDCP SN of 14 of the UE packets confirmed PDCP SN.Wherein specific conversion regime is：Directly the PDCP SN of 14 high position is removed.Source base station is by descending routine Not corresponding to the packet of UE confirmations, the PDCP SDU and PDCP SN after conversion are sent out by X2 interface in PDCP window of sequence numbers Deliver to target BS so that do not taken in transmission to the descending conventional PDCP window of sequence numbers of target BS by the UE packets confirmed With the PDCP SN after conversion.

Preferably, source base station will not be sent to target in descending conventional PDCP window of sequence numbers by the UE packets confirmed Base station, specifically include：

Source base station will not removed the PDCP sequences of source base station distribution by the UE packets confirmed in conventional PDCP window of sequence numbers Row number, and by the PDCP SDU corresponding to the packet of UE confirmations are not sent to target BS in conventional PDCP window of sequence numbers.

Preferably, this method also includes：

Source base station removes the remaining data bag in descending conventional PDCP window of sequence numbers the PDCP sequences of source base station distribution Number, and PDCPSDU corresponding to the remaining data bag in descending conventional PDCP window of sequence numbers is sent to target BS.

Wherein, the remaining data in descending conventional PDCP window of sequence numbers includes descending conventional PDCP window of sequence numbers The interior packet not confirmed by UE.

Preferably, source base station by the remaining data bag in downbound expansion PDCP window of sequence numbers by X2 interface send to Target BS, specifically include：

Remaining data bag in downbound expansion PDCP window of sequence numbers is passed through X2 interface by source base station as new packet Send to target BS.Its detailed process is as follows：

Source base station removes the remaining data bag in downbound expansion PDCP window of sequence numbers the PDCP SN of source base station distribution, Source base station sends PDCPSDU corresponding to the remaining data bag in downbound expansion PDCP window of sequence numbers to target base in order Stand.Remove PDCP SN in the art and also referred to as peel off PDCP SN.

Preferably, this method also includes：

The packet received from gateway outside downbound expansion PDCP window of sequence numbers is sent directly to by source base station in order Target BS.

Preferably, this method also includes：

Source base station sends the packet that source base station in uplink conventional PDCP window of sequence numbers has received to target BS.

Wherein source base station sends out the packet that source base station in uplink conventional PDCP window of sequence numbers has received by X2 interface Target BS is delivered to, its detailed process is as follows：

The packet that source base station in uplink conventional PDCP window of sequence numbers has received is carried PDCPSN and passes through X2 by source base station Interface is sent to target BS.The PDCP that the packet that wherein source base station has received in uplink conventional PDCP window of sequence numbers carries SN is the PDCP SN for being converted into the PDCP SN length that target BS uses.Its detailed process is as follows：

The PDCP SN for the packet that source base station has received source base station in uplink conventional PDCP window of sequence numbers are converted into mesh The PDCP SN for the PDCP sequence number length that mark base station uses；

Source base station sends the packet that source base station has received in uplink conventional PDCP window of sequence numbers to target BS and corresponded to PDCP SDU and the PDCP SN of PDCP sequence number length that use of target BS.In the present embodiment, source base station uses In upper-layer protocol head outside PDCP SDU（Such as GTP heads）Carry the PDCP SN for the PDCP sequence number length that target BS uses Mode the PDCP SN for the PDCP sequence number length that target BS uses are sent to target BS.So so that by source base station The packet that transmission has received to source base station in the uplink conventional PDCP window of sequence numbers of target BS, which carries target BS, to be made The PDCP SN of PDCP sequence number length.

Preferably, this method includes：

Source base station abandons the remaining data bag in uplink extended PDCP window of sequence numbers, wherein uplink extended PDCP sequence numbers Remaining data in window includes the packet in uplink conventional PDCP window of sequence numbers.

Fig. 4 show another embodiment of the present invention provide data processing method implementation process, this method be applied to UE sides corresponding to method shown in Fig. 3, details are as follows：

S201, after UE switches to target BS by source base station, UE by uplink conventional PDCP window of sequence numbers not by institute The packet of source base station confirmation is stated, and remaining data bag in uplink extended PDCP window of sequence numbers is sent to target BS.Its Remaining data in middle uplink extended PDCP window of sequence numbers includes the packet in uplink conventional PDCP window of sequence numbers.

In the present embodiment, when UE switches to target BS by source base station, UE is voluntarily inferred to uplink conventional PDCP sequences The origin identification of the origin identification of row number window and descending conventional PDCP window of sequence numbers, or UE are up often from source base station reception Advise the origin identification of PDCP window of sequence numbers and the origin identification of descending conventional PDCP window of sequence numbers.

UE determines the side of descending conventional PDCP window of sequence numbers according to the origin identification of descending conventional PDCP window of sequence numbers Boundary and the border of downbound expansion PDCP window of sequence numbers；UE determines according to the origin identification of uplink conventional PDCP window of sequence numbers The border of the conventional PDCP window of sequence numbers of row and the border of uplink extended PDCP window of sequence numbers.

In an embodiment of the present invention, the number that UE will not confirmed in uplink conventional PDCP window of sequence numbers by the source base station Sent according to the remaining data bag in bag, and uplink extended PDCP window of sequence numbers by wave point to target BS.

Preferably, UE by uplink conventional PDCP window of sequence numbers not by the packet that the source base station confirms send to The detailed process of target BS is as follows：

UE will not be converted into target in uplink conventional PDCP window of sequence numbers by the PDCP SN for the packet that source base station confirms The PDCP SN for the PDCP sequence number length that base station uses；

The PDCP SN for the PDCP sequence number length that UE uses according to target BS reconfigure up PDCP window of sequence numbers PDCP Service Data Unit PDU corresponding to the packet not confirmed by source base station inside, and the PDCP PDU reconfigured are sent To the target BS.Preferably, the remaining data bag in uplink extended PDCP window of sequence numbers is passed through wave point by UE Send to target BS, sent as new packet by wave point to the target BS, its detailed process is as follows：

The PDCP sequence numbers of remaining data bag in uplink extended PDCP window of sequence numbers are converted into target BS by UE to be made The sequence number of PDCP sequence number length；

The sequence number of the PDCP sequence number length used according to target BS reconfigures uplink extended PDCP sequence number windows Intraoral remaining data bag corresponds to PDCP PDU, and the PDCP PDU reconfigured are sent to the target BS.

In an alternative embodiment of the invention, the data that UE will not confirmed in uplink conventional PDCP window of sequence numbers by source base station Bag is sent to target BS, is specifically included：

UE will not removed the PDCP sequences of UE distribution by the packet that source base station confirms in uplink conventional PDCP window of sequence numbers Row number, and the PDCP sequence numbers length used according to target BS is not by source base in uplink conventional PDCP window of sequence numbers again Stand confirm allocation of packets PDCP sequence numbers, uplink conventional PDCP sequences are reconfigured using the PDCP sequence numbers redistributed PDCP PDU corresponding to the packet not confirmed in number window by source base station, and the PDCP PDU reconfigured are sent to described Target BS.

Preferably, in addition to：

UE by the remaining data bag in uplink conventional PDCP window of sequence numbers remove UE distribution PDCP sequence numbers, and according to The PDCP sequence numbers length that target BS uses is again the remaining data bag distribution in uplink conventional PDCP window of sequence numbers PDCP sequence numbers, the remaining data in uplink conventional PDCP window of sequence numbers is reconfigured using the PDCP sequence numbers redistributed PDCP PDU corresponding to bag, and the PDCP PDU reconfigured are sent to target BS；

Wherein, the remaining data in uplink conventional PDCP window of sequence numbers includes uplink conventional PDCP window of sequence numbers The interior packet not confirmed by source base station.

Preferably, in addition to：

UE by the remaining data bag in uplink extended PDCP window of sequence numbers remove UE distribution PDCP sequence numbers, and according to The PDCP sequence numbers length that target BS uses is again the remaining data bag distribution in uplink extended PDCP window of sequence numbers PDCP sequence numbers, and use the PDCP sequence numbers redistributed to reconfigure the remainder in uplink extended PDCP window of sequence numbers Sent according to PDCP PDU corresponding to bag, and by the PDCP PDU reconfigured to target BS；

Wherein, the remaining data in uplink extended PDCP window of sequence numbers includes uplink conventional PDCP window of sequence numbers Interior packet.Preferably, this method also includes：

UE by outside uplink extended PDCP window of sequence numbers from the packet that upper strata receives by wave point send to Target BS, its detailed process are as follows：

The PDCP SN that UE uses according to target BS are being received from upper strata outside uplink extended PDCP window of sequence numbers Allocation of packets PDCP SN, and using the PDCP SN construction PDCP PDU of distribution, the PDCP PDU of construction are sent in order To target BS.

Preferably, after UE switches to target BS by source base station, UE is abandoned in downbound expansion PDCP window of sequence numbers Remaining data bag, after connection is established with target BS, continue from target BS received data packet, UE PDCP layers will receive Packet sequentially submitted to upper strata.Remaining data wherein in downbound expansion PDCP window of sequence numbers includes described descending Packet in conventional PDCP window of sequence numbers.

In the embodiment shown in Fig. 3 and Fig. 4, target BS receives descending conventional PDCP sequences by X2 interface from source base station The packet not confirmed in row number window by UE, and the remaining data bag in downbound expansion PDCP window of sequence numbers, and it is descending After extending the packet received from gateway outside PDCP window of sequence numbers, the packet for carrying PDCP SN, then this is continued to use The PDCP SN that packet carries, construct PDCP Service Data Units（PDU）Sent to UE；Data for not carrying PDCP SN Bag, after distributing PDCP SN for it, construction PDCP PDU are sent to UE.

Target BS receives what source base station in uplink conventional PDCP window of sequence numbers had received by X2 interface from source base station Packet, and established with UE after bottom is connected, continue through wave point and receive uplink conventional PDCP window of sequence numbers from UE Remaining data bag in the packet not confirmed by the source base station inside, and uplink extended PDCP window of sequence numbers, target BS PDCP layers the packet of reception is sequentially submitted to upper strata.

In the embodiment shown in Fig. 3 and Fig. 4, when UE switches to target BS from source base station, source base station will be descending normal Advise not by the packet of UE confirmations in PDCP window of sequence numbers, and the remaining data bag in downbound expansion PDCP window of sequence numbers leads to Cross X2 interface to send to target BS, UE abandons the remaining data bag in downbound expansion PDCP window of sequence numbers, and continues from mesh Base station received data packet is marked, and the packet of reception is sequentially committed to upper strata, mesh is switched to from source base station so as to avoid UE The problem of data-bag lost of downlink data and packet repeat when marking base station；Source base station is by uplink conventional PDCP window of sequence numbers The packet that interior source base station has received is sent to target BS by X2 interface, while UE is by uplink conventional PDCP window of sequence numbers The packet not confirmed by source base station inside, and remaining data bag in uplink extended PDCP window of sequence numbers are sent out by wave point Deliver to target BS, so as to avoid UE from source base station switch to target BS when upstream data data-bag lost and packet The problem of repeating.

Fig. 5 shows the implementation process for the data processing method that another embodiment of the present invention provides, the side of the embodiment Method is the further improvement done on the basis of Fig. 3 or Fig. 4, and details are as follows：

S301, source base station send switching command to UE.The switching command has rising for uplink conventional PDCP window of sequence numbers The origin identification for mark and the descending conventional PDCP window of sequence numbers of beginning.

Preferably, this method also includes：

When UE switches from source base station to target BS, source base station sends handover request to target BS；

Source base station receives the handoff response that target BS is sent.There is the handoff response target BS not support to extend PDCP The information of window of sequence numbers.

In the present embodiment, when source base station receives UE measurement report, and according to the measurement report determine UE need into When row base station switches, source base station selected target base station, and handover request is sent to selected target BS, target BS is receiving After the handover request sent to source base station, if agreeing to receive this UE, handoff response just is returned to source base station, to complete source base The handover negotiation optimization stood between target BS.

S302, the packet that source base station will not confirmed in descending conventional PDCP window of sequence numbers by UE, and downbound expansion Remaining data bag in PDCP window of sequence numbers is sent to target BS.Residue wherein in downbound expansion PDCP window of sequence numbers Packet does not include the packet in descending conventional PDCP window of sequence numbers.Its detailed process is as described above, will not be repeated here.

In the present embodiment, when UE needs to switch to target BS from source base station, source base station is completed to cut with target BS After changing negotiation, after source base station knows the PDCP SN that target BS does not support extension, i.e., switching command is sent to UE, UE is being received To after the switching command of source base station, according to the origin identification of the descending window in the switching command and the origin identification of up window After the processing for carrying out uplink and downlink data, you can target BS is switched to, so as to not only avoid UE between the base station of different editions The problem of existing data-bag lost and packet repeat when switching over, while avoid UE and enter between the base station of different editions Existing handoff delay problem during row switching.

In order that the method shown in Fig. 5 is apparent, it is described in detail below in the form of interaction figure.

Referring to Fig. 6, the interaction implementation process for data processing method provided in an embodiment of the present invention.

1st, UE sends measurement report to source base station.

2nd, source base station is receiving UE measurement report, and determines that UE needs to carry out base station switching according to the measurement report When, source base station selected target base station, and send handover request to selected target BS.

3rd, after target BS receives the handover request of source base station transmission, if agreeing to receive this UE, just to source base station Handoff response is returned to, to complete the handover negotiation optimization between source base station and target BS.

4th, source base station knows that target BS does not support the PDCPSN of extension according to the handoff response that target BS returns.

5th, source base station sends switching command to UE.The switching command has the origin identification of descending window and up window Origin identification.

6th, source base station and UE are handled up-downgoing data.Wherein source base station and UE are handled up-downgoing data Concrete processing procedure as shown in Figure 3, Figure 4, will not be repeated here.

7th, UE switches to target BS, is established with target BS after bottom is connected, continues data transfer so that UE is from source base Station switches to target BS.

For convenience of description, the above method provided in an embodiment of the present invention is illustrated with a specific example below Explanation.

Referring to Fig. 7, it is the handling process of downlink data provided in an embodiment of the present invention, in this example, with source base station The extension PDCP SN used are 14 bits, exemplified by the PDCP SN that target BS uses are 13 bits.

In this example, it is assumed that first is issued in UE downlink data from source base station not by the UE packets confirmed 56 number bags are identified as, i.e., the origin identification for the descending conventional PDCP window of sequence numbers that source base station determines is 56, and is assumed When needing to switch over, send into UE 56 to 4153 number bags 57 to 4152 number Bao Junyi from source base station and obtain UE Confirmation.Then the processing procedure of downlink data during UE progress base station switching is as follows：

When source base station receives UE measurement report, and determines that UE needs to carry out base station switching according to the measurement report, Source base station selected target base station, and handover request is sent to selected target BS, target BS is receiving source base station transmission Handover request after, to source base station return handoff response, to complete the handover negotiation optimization between source base station and target BS.

When source base station knows that target BS does not support the PDCPSN of extension according to the handoff response that target BS returns, source base Stand and the origin identification of the descending conventional PDCP window of sequence numbers of carrying is sent to UE（I.e. 56）Switching command.Source base station foundation simultaneously The origin identification of descending conventional PDCP window of sequence numbers（I.e. 56）Determine the border of descending conventional PDCP window of sequence numbers and descending Extend the border of PDCP window of sequence numbers.Due to the origin identification of descending conventional PDCP window of sequence numbers, downbound expansion PDCP sequences The original position of the origin identification of row number window is identical, and the length of descending conventional PDCP window of sequence numbers is 4096, descending expansion The length for opening up PDCP window of sequence numbers is 8192, may thereby determine that the termination of descending conventional PDCP window of sequence numbers is identified as （55+4096）=4151, the termination of downbound expansion PDCP window of sequence numbers is identified as（55+8192）=8247.

The packet that source base station will not confirmed in descending conventional PDCP window of sequence numbers by UE, and downbound expansion PDCP sequences Remaining data bag in number window is sent to target BS.I.e. descending conventional PDCP window of sequence numbers is initiated with 56, terminates as 4151, and due to obtaining UE confirmation from 57 to the 4152 number Bao Junyi that source base station is sent to UE, therefore, descending routine Not by the UE packets confirmed it is packet that PDCP SN are 56 in PDCP window of sequence numbers.And downbound expansion PDCP sequence numbers Remaining data bag in window is the packet that PDCP SN are 4152,4153, so, source base station is by descending conventional PDCP sequences After the PDCP SN for the packet that PDCP SN in number window are 56 high position is removed, the PDCP SN in carryings after the conversion are sent out Deliver to target BS.Source base station is sent to Target Station after the packet that PDCP SN are 4152,4153 is removed into PDCP SN simultaneously, The packet newly received from gateway is sent directly to target BS simultaneously.

In target BS side, target BS by X2 interface from source base station received data packet, the number for carrying PDCP SN According to bag, then the PDCP SN are continued to use, construction PDCP PDU are sent to UE, the packet for not carrying PDCP SN, target BS After distributing PDCP SN for it, PDCP PDU are constructed, and the PDCP PDU of construction are sent to UE by wave point.

In UE sides, referring to Fig. 7, before the handover, 57 to 4151,4152 number bags are the data for having received and having confirmed Bag, then after the switching command of source base station transmission is received, according to the descending conventional PDCP sequence numbers carried in the switching command The origin identification of window（I.e. 56）Determine the border of descending conventional PDCP window of sequence numbers（That is 56-4151）, abandon descending routine Packet outside PDCP window of sequence numbers（Such as 4152）, and target BS is switched to from source base station, establishing bottom with target BS After layer connection, continue from target BS received data packet, packet is sequentially forwarded to UE upper strata by UE PDCP layers.

Referring to Fig. 8, it is the handling process of upstream data provided in an embodiment of the present invention, in this example, with source base station The extension PDCP SN used are 14 bits, exemplified by the PDCP SN that target BS uses are 13 bits.

In this example, it is assumed that first data that source base station do not receive are sent into the upstream data of source base station from UE Bag is identified as 56 number bags, so the origin identification for the uplink conventional PDCP window of sequence numbers that source base station determines is 56, and Assuming that when needing to switch over, sent from UE to the 57 of source base station, 59 to 4152 number Bao Junyi and obtain source base station really Recognize.Then the handling process of upstream data is as follows in handoff procedure：

Source base station and target BS switch over consult after when knowing that target BS does not support the PDCP SN of extension, source base Stand and the origin identification of carrying uplink conventional PDCP window of sequence numbers is sent to UE（I.e. 56）Switching command.Source base station foundation simultaneously The origin identification of uplink conventional PDCP window of sequence numbers（I.e. 56）Determine the termination mark of uplink conventional PDCP window of sequence numbers（I.e. 4151）.

For upstream data, source base station is by the PDCP for the packet having been had successfully received in uplink conventional PDCP window of sequence numbers After SN is converted into the SN of PDCP sequence number length of target BS, the PDCP SN after PDCP SDU and conversion are passed through into X2 interface Send to target BS（I.e. 57,59 to 4151 number bags）, while abandon the data outside uplink conventional PDCP window of sequence numbers Bag（That is 4152 number bags）.

In UE sides, referring to Fig. 8, before the handover, UE is after the switching command of source base station transmission is received, and UE is according to up The origin identification of conventional PDCP window of sequence numbers（I.e. 56）Determine the border of uplink conventional PDCP window of sequence numbers（That is 56- 4151）.After handover, by the packet of not confirmed in uplink conventional PDCP window of sequence numbers（56、58）PDCP SN conversion Sent after into the PDCP SN of the PDCP SN length of target BS by wave point to target BS, and by uplink extended PDCP Remaining data bag in window of sequence numbers（Such as 4152 number bags）PDCP SN be converted into the PDCP SN length of target BS PDCP SN after sent by wave point to target BS, while by the new data packets received from upper strata outside extended window PDCP SN are distributed, and using transmission after the PDCP SN construction PDCP PDU of distribution to target BS.

Fig. 9 shows the implementation process for the data processing method that another embodiment of the present invention provides, the method for the embodiment It is the further improvement done on the basis of Fig. 3, in this embodiment, source base station receives UE measurement report, and according to this When measurement report determines that UE needs to carry out base station switching, source base station selected target base station, and cut with selected target BS After changing negotiation, to UE send reconfiguration request, receive UE reconfigure response after, source base station to UE send switching command, Details are as follows：

S401, when UE switches from source base station to target BS, source base station sends handover request to target BS.

S402, source base station receive the handoff response that target BS is sent.There is the handoff response target BS not support to expand Open up the information of PDCP window of sequence numbers.

S403, source base station sends reconfiguration request to UE, to be reconfigured to source base station and UE, and receives UE returns Reconfigure response.

In the present embodiment, source base station knows that target BS does not support extension according to the handoff response that target BS returns During PDCP SN, source base station sends reconfiguration request to UE.The reconfiguration request has rising for uplink conventional PDCP window of sequence numbers The origin identification for mark and the descending conventional PDCP window of sequence numbers of beginning, to be reconfigured to source base station and UE, and receives UE and returns That returns reconfigures response.

The detailed process for wherein reconfiguring source base station is as follows：Source base station is according to the descending conventional PDCP sequences in reconfiguration request The origin identification of row number window determines border and the downbound expansion PDCP window of sequence numbers of descending conventional PDCP window of sequence numbers Border, using the remaining data Bao Jun in downbound expansion PDCP window of sequence numbers as new packet；Source base station foundation reconfigures The origin identification of uplink conventional PDCP window of sequence numbers in request determines the border of uplink conventional PDCP window of sequence numbers and upper The border of row extension PDCP window of sequence numbers, abandons the remaining data bag in uplink extended PDCP window of sequence numbers.

The detailed process for wherein reconfiguring UE is as follows：UE is according to the descending conventional PDCP window of sequence numbers in reconfiguration request Origin identification determine the border of descending conventional PDCP window of sequence numbers and the border of downbound expansion PDCP window of sequence numbers, abandon Remaining data bag in downbound expansion PDCP window of sequence numbers；UE is according to the uplink conventional PDCP sequence number windows in reconfiguration request The origin identification of mouth determines the border of uplink conventional PDCP window of sequence numbers and the border of uplink extended PDCP window of sequence numbers, will Remaining packet is as new packet in uplink extended PDCP window of sequence numbers.

Referring to Fig. 10, for the handling process of downlink data provided in an embodiment of the present invention, illustrated therein is before reconfiguring With the buffer status of the downlink data that reconfigures opisthogenesis base station side and UE sides PDCP buffering areas.Before reconfiguring, source base station side Packet 56 to 4151, the downbound expansion PDCP sequence numbers being cached with PDCP buffering areas in descending conventional PDCP window of sequence numbers Remaining packet 4152 and 4153 and the new data packets received from gateway in window, after reconfiguring, source base station side In PDCP buffering areas, using remaining packet in downbound expansion PDCP window of sequence numbers as new packet.Before reconfiguring, The packet 57 to 4151 and uplink extended being cached with the PDCP buffering areas of UE sides in uplink conventional PDCP window of sequence numbers Remaining packet 4152 in PDCP window of sequence numbers, after reconfiguring, uplink conventional is only cached in the PDCP buffering areas of UE sides Packet 57 to 4151 in PDCP window of sequence numbers, remaining packet 4152 is lost in uplink extended PDCP window of sequence numbers Abandon.

S404, source base station send switching command to UE.

S405, the packet that source base station will not confirmed in descending conventional PDCP window of sequence numbers by UE, and downbound expansion Remaining data bag in PDCP window of sequence numbers is sent to target BS.Residue wherein in downbound expansion PDCP window of sequence numbers Packet does not include the packet in descending conventional PDCP window of sequence numbers.Its detailed process is as described above, will not be repeated here.

S406, source base station send the packet that source base station in uplink conventional PDCP window of sequence numbers has received to target base Stand.Its detailed process is as described above, will not be repeated here.In the present embodiment, when UE needs to switch to target base from source base station When standing, source base station first switches over negotiation with target BS, then is interacted with UE, and after being reconfigured to UE, source base station is sent out to UE After sending switching command, source base station and UE to handle up-downgoing data, UE switches to target BS from source base station.

In an alternative embodiment of the invention, source base station receives UE measurement report, and determines UE according to the measurement report When needing to carry out base station switching, behind source base station selected target base station, reconfiguration request first is sent to UE, is receiving matching somebody with somebody again for UE After putting response, then after switching over negotiation with selected target BS, source base station sends switching command to UE.

Figure 11 shows the implementation process for the data processing method that another embodiment of the present invention provides, and this method is applied to source Base station side, details are as follows：

S501, when user equipment (UE) switches from source base station to target BS, source base station is by descending conventional PDCP sequence numbers Remaining data bag in packet in window, and downbound expansion PDCP window of sequence numbers is sent to target BS.

Wherein, the packet in downbound expansion PDCP window of sequence numbers can include in descending conventional PDCP window of sequence numbers The remaining data bag in packet and descending conventional PDCP window of sequence numbers not confirmed by UE.For example, above-mentioned downbound expansion Packet in PDCP window of sequence numbers is all packets in the window.In above-mentioned descending conventional PDCP window of sequence numbers Remaining data includes the packet not confirmed in descending conventional PDCP window of sequence numbers by UE.

Preferably, this method also includes：

When UE switches from source base station to target BS, source base station sends the switching command configured entirely to UE.This is configured entirely Switching command have descending conventional PDCP window of sequence numbers origin identification and uplink conventional PDCP window of sequence numbers starting Mark.

The switching command wherein configured entirely refers to be used to indicate that UE configure entirely and switched to target BS from source base station Instruction.Wherein full configuration-direct requires that parameter, buffer status that UE configures source base station etc. empties.

Preferably, source base station by all packets in descending conventional PDCP window of sequence numbers by X2 interface send to Target BS.

In an embodiment of the present invention, source base station is by the PDCP of all packets in descending conventional PDCP window of sequence numbers Sequence number is converted into the sequence number for the PDCP sequence number length that target BS uses, and by descending conventional PDCP window of sequence numbers All packets corresponding to the sequence number of PDCP sequence number length that uses of PDCP SDU and target BS send to target base Stand.

In an alternative embodiment of the invention, source base station removes all packets in descending conventional PDCP window of sequence numbers The PDCP sequence numbers of source base station distribution, and by PDCP SDU corresponding to all packets in descending conventional PDCP window of sequence numbers Send to target BS.

In the present embodiment, source base station is using the remaining data Bao Jun in downbound expansion PDCP window of sequence numbers as new data Bag is sent to target BS by X2 interface.Its detailed process is as follows：

Source base station removes the remaining data bag in downbound expansion PDCP window of sequence numbers the PDCP sequences of source base station distribution Number, and PDCPSDU corresponding to the remaining data bag in downbound expansion PDCP window of sequence numbers is sent to target BS.

Preferably, this method also includes：

The packet that source base station newly receives the source base station outside downbound expansion PDCP window of sequence numbers from gateway is straight in order Target BS is delivered in sending and receiving.

Figure 12 show another embodiment of the present invention provide data processing method implementation process, this method be applied to UE sides corresponding to method shown in Figure 11, details are as follows：

S601, after user equipment (UE) switches to target BS by source base station, UE is by uplink conventional PDCP window of sequence numbers Remaining data bag in interior packet, and uplink extended PDCP window of sequence numbers is sent to target BS.

Wherein, the remaining data in uplink extended PDCP window of sequence numbers includes uplink conventional PDCP window of sequence numbers Interior packet.Packet in above-mentioned uplink extended DCP window of sequence numbers can be all packets in the window.And And all packets in uplink conventional PDCP window of sequence numbers include conventional PDCP window of sequence numbers in not by source base station Remaining data bag in the packet of confirmation and conventional PDCP window of sequence numbers.

In the present embodiment, when UE switches to target BS by source base station, UE is voluntarily inferred to uplink conventional PDCP sequences The origin identification of the origin identification of row number window and descending conventional PDCP window of sequence numbers, or UE receive full configuration from source base station Switching command, the switching command configured entirely has the origin identification of uplink conventional PDCP window of sequence numbers and descending routine The origin identification of PDCP window of sequence numbers.

Preferably, UE is by all packets in uplink conventional PDCP window of sequence numbers, and uplink extended PDCP sequences Remaining data bag in number window is sent to target BS by wave point.

In an embodiment of the present invention, UE is by the PDCP sequences of all packets in uplink conventional PDCP window of sequence numbers Number it is converted into the sequence number for the PDCP sequence number length that target BS uses, the PDCP sequence number length used according to target BS Sequence number reconfigure in uplink conventional PDCP window of sequence numbers PDCP PDU corresponding to the packet not confirmed by source base station, And the PDCP PDU reconfigured are sent to the target BS.

Preferably, the PDCP sequence numbers of the remaining data bag in uplink extended PDCP window of sequence numbers are converted into mesh by UE The sequence number for the PDCP sequence number length that mark base station uses, the sequence number weight of the PDCP sequence number length used according to target BS PDCP PDU corresponding to remaining data bag in neotectonics uplink extended PDCP window of sequence numbers, and the PDCP that will be reconfigured PDU is sent to the target BS.

In an alternative embodiment of the invention, all packets in uplink conventional PDCP window of sequence numbers are removed UE points by UE The PDCP sequence numbers matched somebody with somebody, and the PDCP sequence numbers length used according to target BS is uplink conventional PDCP window of sequence numbers again The allocation of packets PDCP sequence numbers not confirmed by source base station inside, reconfigured using the PDCP sequence numbers redistributed up normal PDCP PDU corresponding to the packet not confirmed in PDCP window of sequence numbers by source base station are advised, and by the PDCP reconfigured PDU is sent to the target BS.

Preferably, UE removes the remaining data bag in uplink extended PDCP window of sequence numbers the PDCP sequences of UE distribution Number, and the PDCP sequence numbers length used according to target BS is again the remaining data in uplink extended PDCP window of sequence numbers Bag distribution PDCP sequence numbers, reconfigured using the PDCP sequence numbers redistributed surplus in uplink extended PDCP window of sequence numbers PDCPPDU corresponding to remaining packet, and the PDCP PDU reconfigured are sent to the target BS.

In an alternative embodiment of the invention, this method also includes：

In an alternative embodiment of the invention, UE abandons the packet in descending conventional PDCP window of sequence numbers, and descending expansion The remaining data bag in PDCP window of sequence numbers is opened up, after connection is established with target BS, from target BS received data packet, UE PDCP layers the packet of reception is sequentially submitted to upper strata.Remaining data bag wherein in downbound expansion PDCP window of sequence numbers The packet in the descending conventional PDCP window of sequence numbers is not included.

In the embodiment shown in Figure 11 and Figure 12, target BS receives descending conventional PDCP by X2 interface from source base station The packet not confirmed in window of sequence numbers by UE, the remaining data bag in descending conventional PDCP window of sequence numbers, and descending expansion After opening up the remaining data bag in PDCP window of sequence numbers, the packet for carrying PDCP SN, then packet carrying is continued to use PDCP SN, construction PDCP PDU to UE send；Packet for not carrying PDCP SN, after distributing PDCP SN for it, structure PDCPPDU is made to send to UE.

Target BS receives what is do not confirmed in uplink conventional PDCP window of sequence numbers by source base station by wave point from UE Packet, the remaining data bag in uplink conventional PDCP window of sequence numbers, and the residue in uplink extended PDCP window of sequence numbers Packet sends to the target BS, the PDCP layers of target BS and sequentially submits the packet of reception to upper strata.

Figure 13 is referred to, is the handling process of downlink data provided in an embodiment of the present invention, in this example, with source base station The extension PDCP SN used are 14 bits, exemplified by the PDCP SN that target BS uses are 13 bits.

In this example, it is assumed that UE downlink data is issued to from source base station includes the packet that PDCP SN are 31 to 34, The packet that wherein PDCP SN are 32,34 is confirmed that the packet that PDCP SN are 31,33 is not confirmed by UE by UE.Then base station Flow chart of data processing during switching is as follows：

Source base station by descending conventional PDCP window of sequence numbers by UE confirm packet and descending conventional PDCP sequences Remaining data bag in number window（Such as the packet that PDCP SN are 31 to 34）Send to target BS, while by descending expansion Remaining data bag in exhibition PDCP window of sequence numbers is sent to target BS as new packet.

Target BS by X2 interface after source base station receives packet, the packet for carrying PDCP SN, then The PDCP SN of packet carrying are continued to use, construction PDCP PDU are sent to UE；Packet for not carrying PDCP SN, it is it After distributing PDCP SN, construction PDCP PDU are sent to UE.

UE is whole by the packet cached in UE PDCP after the switching command of full configuration of source base station transmission is received Abandon.UE is established after bottom is connected with target BS, from target BS received data packet.

Figure 14 shows the structured flowchart of base station provided in an embodiment of the present invention, for convenience of description, illustrate only and this The related part of inventive embodiments.The base station includes：

Transmitting element 11 is when user equipment (UE) switches from base station to target BS, by descending conventional PDCP window of sequence numbers The packet not confirmed by UE inside, and remaining data bag in downbound expansion PDCP window of sequence numbers are sent to target BS.

Remaining data wherein in downbound expansion PDCP window of sequence numbers includes descending conventional PDCP window of sequence numbers Interior packet.Downbound expansion PDCP window of sequence numbers includes descending conventional PDCP window of sequence numbers, downbound expansion PDCP sequences Number window is identical with the original position of descending conventional PDCP window of sequence numbers.

Preferably, the transmitting element 11 is additionally operable to base station has received in uplink conventional PDCP window of sequence numbers data Bag is sent to target BS.Now, the base station also includes discarding unit 12.The discarding unit 12 abandons uplink extended PDCP sequences Remaining data bag in number window.

Remaining data wherein in uplink extended PDCP window of sequence numbers includes uplink conventional PDCP window of sequence numbers Interior packet.Uplink extended PDCP window of sequence numbers includes uplink conventional PDCP window of sequence numbers, uplink extended PDCP sequences Number window is identical with the original position of uplink conventional PDCP window of sequence numbers.

Preferably, the base station also includes converting unit 13.The converting unit 13 is by descending conventional PDCP window of sequence numbers It is not converted into the sequence number for the PDCP sequence number length that target BS uses by the PDCP sequence numbers of the UE packets confirmed inside.This When, transmitting element 11 is additionally operable to send the packet pair by UE not confirmed in descending conventional PDCP window of sequence numbers to target BS The sequence number for the PDCP sequence number length that the PDCP Service Data Units SDU answered and the target BS obtained use.

Preferably, converting unit 13 is additionally operable to the PDCP of the remaining data bag in descending conventional PDCP window of sequence numbers Sequence number is converted into the sequence number for the PDCP sequence number length that target BS uses.Now, be additionally operable to will be descending for transmitting element 11 The PDCP sequence numbers that PDCPSDU corresponding to remaining data bag in conventional PDCP window of sequence numbers and the target BS obtained use The sequence number of length is sent to target BS.

Wherein, the remaining data in descending conventional PDCP window of sequence numbers includes descending conventional PDCP window of sequence numbers The interior packet not confirmed by the UE.

Preferably, the base station also includes stripping unit 14.The stripping unit 14 by conventional PDCP window of sequence numbers not Removed the PDCP sequence numbers of source base station distribution by the UE packets confirmed.Now, transmitting element 11 is additionally operable to conventional PDCP sequences The PDCPSDU corresponding to the packet of UE confirmations is not sent to target BS in row number window.

Preferably, stripping unit 14 is additionally operable to the remaining data bag in descending conventional PDCP window of sequence numbers removing source The PDCP sequence numbers of base station distribution.Now, transmitting element 11 is additionally operable to the remainder in descending conventional PDCP window of sequence numbers Sent according to PDCP SDU corresponding to bag to target BS.

Preferably, the base station also includes the window determining unit 16 of first window determining unit 15 and second.Wherein：

First window determining unit 15 determines descending routine according to the origin identification of descending conventional PDCP window of sequence numbers The border of PDCP window of sequence numbers and the border of downbound expansion PDCP window of sequence numbers.

It should be noted that herein, " first " in first window determining unit is only the side stated and referred to herein Just, it is not meant to necessarily to have corresponding second window determining unit in the specific implementation of the present invention." the One " does not represent order yet.

Second window determining unit 16 determines uplink conventional according to the origin identification of uplink conventional PDCP window of sequence numbers The border of PDCP window of sequence numbers and the border of uplink extended PDCP window of sequence numbers.

Wherein, the origin identification of uplink conventional PDCP window of sequence numbers be upstream data in source base station do not receive first The mark of individual packet, the origin identification of descending conventional PDCP window of sequence numbers is that source base station transmits to the UE in downlink data And not by the mark of the UE first packet confirmed.

The origin identification of wherein uplink conventional PDCP window of sequence numbers refers to source base station does not receive in upstream data The mark of one packet.The origin identification of descending conventional PDCP window of sequence numbers be downlink data in source base station to UE transmit and Not by the mark of UE first packet confirmed.The wherein PDCP SN for being identified as packet of packet.

Preferably, the transmitting element 11 is additionally operable to send switching command to UE, and the switching command has uplink conventional The origin identification of the origin identification of PDCP window of sequence numbers and descending conventional PDCP window of sequence numbers.

Preferably, the transmitting element is additionally operable to send handover request to target BS.The base station also includes receiving unit 17.The receiving unit 17 receives the handoff response that target BS is sent, and there is the handoff response target BS not support to extend The information of PDCP window of sequence numbers.

Above embodiment illustrates the composition structure of base station provided in an embodiment of the present invention, base provided in an embodiment of the present invention Station can be used for implementing Fig. 3 and Figure 11 corresponds to the step of base station performs in embodiment, for example, transmitting element 11 can perform Fig. 3 In S101.

Figure 15 shows the structured flowchart of user equipment provided in an embodiment of the present invention, for convenience of description, illustrate only The part related to the embodiment of the present invention.The user equipment includes：

Transmitting element 21 is after user equipment switches to target BS by source base station, by uplink conventional PDCP window of sequence numbers The packet not confirmed by source base station inside, and remaining data bag in uplink extended PDCP window of sequence numbers are sent to target base Stand.

Remaining data wherein in uplink extended PDCP window of sequence numbers includes uplink conventional PDCP window of sequence numbers Interior packet.Uplink extended PDCP window of sequence numbers includes uplink conventional PDCP window of sequence numbers, uplink extended PDCP sequences Number window is identical with the original position of the uplink conventional PDCP window of sequence numbers.

Preferably, the user equipment also includes discarding unit 22.The discarding unit 22 abandons downbound expansion PDCP sequences Remaining data bag in number window, the remaining data in downbound expansion PDCP window of sequence numbers include descending conventional PDCP Packet in window of sequence numbers.

Wherein, downbound expansion PDCP window of sequence numbers includes descending conventional PDCP window of sequence numbers, downbound expansion PDCP sequences Row number window is identical with the original position of the descending conventional PDCP window of sequence numbers.

Preferably, the user equipment also includes the structural unit 24 of converting unit 23 and first.The converting unit 23 will be upper It is not converted into what target BS used by the PDCP sequence numbers for the packet that source base station confirms in the conventional PDCP window of sequence numbers of row The sequence number of PDCP sequence number length.The sequence number for the PDCP sequence number length that first structural unit 24 uses according to target BS Reconfigure PDCP Service Data Units PDU corresponding to the packet not confirmed in up PDCP window of sequence numbers by source base station. The PDCP PDU that transmitting element 21 is additionally operable to reconfigure are sent to the target BS.

Preferably, converting unit 23 is additionally operable to the PDCP of the remaining data bag in uplink conventional PDCP window of sequence numbers Sequence number is converted into the sequence number for the PDCP sequence number length that target BS uses.First structural unit 24 is additionally operable to according to target The sequence number for the PDCP sequence number length that base station uses reconfigures the remaining data bag in uplink conventional PDCP window of sequence numbers Corresponding PDCP PDU.The PDCP PDU that transmitting element 21 is additionally operable to reconfigure are sent to target BS.

Wherein, the remaining data in uplink conventional PDCP window of sequence numbers is included in conventional PDCP window of sequence numbers The packet not confirmed by source base station.

Preferably, the converting unit 23 is additionally operable to the remaining data bag in uplink extended PDCP window of sequence numbers PDCP sequence numbers are converted into the sequence number for the PDCP sequence number length that target BS uses.First structural unit 24 is additionally operable to basis The sequence number for the PDCP sequence number length that target BS uses reconfigures the remainder in uplink extended PDCP window of sequence numbers According to the corresponding PDCP PDU of bag.The PDCP PDU that transmitting element 21 is additionally operable to reconfigure are sent to the target BS.

Wherein, the remaining data in uplink extended PDCP window of sequence numbers is included in conventional PDCP window of sequence numbers Packet.

Preferably, user equipment also includes the structural unit 26 of weight subdivision 25 and second.The heavy subdivision 25 will be up Do not removed the PDCP sequence numbers of UE distribution in conventional PDCP window of sequence numbers by the packet that source base station confirms, and according to target base Packet of the PDCP sequence numbers length that station uses again not confirmed in uplink conventional PDCP window of sequence numbers by source base station divides With PDCP sequence numbers.Second structural unit 26 is used to reconfigure uplink conventional PDCP sequences according to the PDCP sequence numbers redistributed PDCP PDU corresponding to the packet not confirmed in row number window by source base station.Transmitting element 21 is additionally operable to reconfigure PDCP PDU are sent to target BS.

Preferably, weight subdivision 25 is additionally operable to the remaining data bag in uplink conventional PDCP window of sequence numbers removing UE The PDCP sequence numbers of distribution, and the PDCP sequence numbers length used according to target BS is uplink conventional PDCP sequence number windows again Intraoral remaining data bag distribution PDCP sequence numbers.Second structural unit 26 is additionally operable to according to the PDCP sequence number weights redistributed PDCP PDU corresponding to remaining data bag in neotectonics uplink conventional PDCP window of sequence numbers.Transmitting element 21 is additionally operable to weight The PDCPPDU of neotectonics is sent to target BS.

Preferably, weight subdivision 25 is additionally operable to the remaining data bag in uplink extended PDCP window of sequence numbers removing UE The PDCP sequence numbers of distribution, and the PDCP sequence numbers length used according to target BS is uplink extended PDCP sequence number windows again Intraoral remaining data bag distribution PDCP sequence numbers.Second structural unit 26 is additionally operable to according to the PDCP sequence number weights redistributed PDCP PDU corresponding to remaining data bag in neotectonics uplink extended PDCP window of sequence numbers, and the PDCP that will be reconfigured PDU is sent to target BS.

Wherein, the remaining data in uplink extended PDCP window of sequence numbers includes uplink conventional PDCP window of sequence numbers Interior packet.

Preferably, user equipment also includes the window determining unit 28 of first window determining unit 27 and second.Wherein：

First window determining unit 27 determines descending routine according to the origin identification of descending conventional PDCP window of sequence numbers The border of PDCP window of sequence numbers and the border of downbound expansion PDCP window of sequence numbers.

Second window determining unit 28 determines uplink conventional according to the origin identification of uplink conventional PDCP window of sequence numbers The border of PDCP window of sequence numbers and the border of uplink extended PDCP window of sequence numbers.

Wherein, the origin identification of uplink conventional PDCP window of sequence numbers be upstream data in source base station do not receive first The mark of individual packet, the origin identification of descending conventional PDCP window of sequence numbers is that source base station transmits to the UE in downlink data And not by the mark of UE first packet confirmed.

Preferably, user equipment also includes receiving unit 29.The receiving unit 29 receives the switching life that source base station is sent Order or reconfiguration request, the switching command or reconfiguration request have the origin identification of descending conventional PDCP window of sequence numbers and upper The origin identification of the conventional PDCP window of sequence numbers of row.

One of ordinary skill in the art will appreciate that it is unit and module included by above-mentioned base station and user equipment Simply divided according to function logic, but be not limited to above-mentioned division, as long as corresponding function can be realized； In addition, the specific name of each functional unit and module is also only to facilitate mutually distinguish, the guarantor being not intended to limit the invention Protect scope.

Above embodiment illustrates the composition structure of user equipment provided in an embodiment of the present invention, the embodiment of the present invention provides User equipment can be used for implementing Fig. 3 and Figure 11 corresponds to the step of user equipment performs in embodiment, for example, transmitting element 21 The S201 in Fig. 4 can be performed.

Figure 16 shows the composition structure of base station provided in an embodiment of the present invention, and base station provided in an embodiment of the present invention can be with The method that embodiment is corresponded to for implementing Fig. 3 and Figure 11, for convenience of description, it illustrate only the portion related to the embodiment of the present invention Point, particular technique details does not disclose, refer to Fig. 3 and Figure 11 corresponds to embodiment.The base station includes：

Transmitter 31 is when user equipment (UE) switches from base station to target BS, by descending conventional PDCP window of sequence numbers The packet not confirmed by UE, and remaining data bag in downbound expansion PDCP window of sequence numbers are sent to target BS.

Preferably, the transmitter 31 is additionally operable to source base station has received in uplink conventional PDCP window of sequence numbers data Bag is sent to target BS.The base station also includes processor 32.The processor 32 is abandoned in uplink extended PDCP window of sequence numbers Remaining data bag.

Preferably, the processor 32 is additionally operable to the packet that will not confirmed in descending conventional PDCP window of sequence numbers by UE PDCP sequence numbers be converted into the sequence number of the PDCP sequence number length that target BS uses.Transmitter 31 is additionally operable to target base PDCP Service Data Units SDU and mesh corresponding to the packet not confirmed in the descending conventional PDCP window of sequence numbers of transmission of standing by UE The sequence number for the PDCP sequence number length that mark base station uses.

Preferably, the processor 32 is additionally operable to the PDCP of the remaining data bag in descending conventional PDCP window of sequence numbers Sequence number is converted into the sequence number for the PDCP sequence number length that target BS uses.Transmitter 31 is additionally operable to descending conventional PDCP The sequence number for the PDCP sequence number length that PDCP SDU and target BS corresponding to remaining data bag in window of sequence numbers use Send to target BS.

Preferably, the processor 32 is additionally operable in conventional PDCP window of sequence numbers by the UE packets confirmed will not removed The PDCP sequence numbers of source base station distribution.Transmitter 31 is additionally operable to the packet that will not confirmed in conventional PDCP window of sequence numbers by UE Corresponding PDCP SDU are sent to target BS.

Preferably, the processor 32 is additionally operable to the remaining data bag in descending conventional PDCP window of sequence numbers removing source The PDCP sequence numbers of base station distribution.Transmitter 31 is additionally operable to the remaining data bag in descending conventional PDCP window of sequence numbers is corresponding PDCP SDU send to target BS.

Preferably, the processor 32 is additionally operable to be determined according to the origin identification of descending conventional PDCP window of sequence numbers descending The border of conventional PDCP window of sequence numbers and the border of downbound expansion PDCP window of sequence numbers, according to uplink conventional PDCP sequence numbers The origin identification of window determines the border of uplink conventional PDCP window of sequence numbers and the border of uplink extended PDCP window of sequence numbers.

Preferably, transmitter 31 is additionally operable to send switching command to UE, and the switching command has uplink conventional PDCP sequences The origin identification of the origin identification of row number window and descending conventional PDCP window of sequence numbers.

Preferably, the base station also includes receiver 33.The switching that the receiver 33 is used to receive target BS transmission rings Should, there is the handoff response target BS not support to extend the information of PDCP window of sequence numbers.

, can be with it will be understood by those skilled in the art that the composition structure shown in Figure 16 does not form the restriction to base station Including than illustrating more or less parts, either combining some parts or different parts arrangement.

Figure 17 shows the composition structure for the user equipment that another embodiment of the present invention provides, provided in an embodiment of the present invention User equipment can be used for implementing the method that Fig. 4 and Figure 12 corresponds to embodiment, for convenience of description, illustrate only real with the present invention The related part of example is applied, particular technique details does not disclose, refer to Fig. 4 and Figure 12 corresponds to embodiment.The user equipment includes：

Transmitter 41 is after user equipment switches to target BS by source base station, by uplink conventional PDCP window of sequence numbers The packet not confirmed by source base station, and remaining data bag in uplink extended PDCP window of sequence numbers are sent to target BS.

Preferably, the user equipment also includes processor 42.The processor 42 abandons downbound expansion PDCP sequence number windows Intraoral remaining data bag, the remaining data in downbound expansion PDCP window of sequence numbers include descending conventional PDCP sequences Packet in number window.

Preferably, the processor 42 is additionally operable to the number that will not confirmed in uplink conventional PDCP window of sequence numbers by source base station The sequence number for the PDCP sequence number length that target BS uses is converted into according to the PDCP sequence numbers of bag.Transmitter 41 is additionally operable to basis The sequence number for the PDCP sequence number length that target BS uses reconfigures not true by source base station in up PDCP window of sequence numbers PDCP Service Data Units PDU corresponding to the packet recognized, and the PDCP PDU reconfigured are sent to the target BS.

Preferably, processor 42 is additionally operable to the PDCP sequences of the remaining data bag in uplink conventional PDCP window of sequence numbers Row number is converted into the sequence number for the PDCP sequence number length that target BS uses.Processor 42 is additionally operable to be used according to target BS The sequence number of PDCP sequence number length reconfigure corresponding to the remaining data bag in uplink conventional PDCP window of sequence numbers PDCP PDU, and the PDCPPDU reconfigured is sent to target BS.

Preferably, the processor 42 is additionally operable to the PDCP of the remaining data bag in uplink extended PDCP window of sequence numbers Sequence number is converted into the sequence number for the PDCP sequence number length that target BS uses.Transmitter 41 is additionally operable to be made according to target BS The remaining data bag that the sequence number of PDCP sequence number length is reconfigured in uplink extended PDCP window of sequence numbers is corresponding PDCP PDU, and the PDCP PDU reconfigured are sent to the target BS.

Preferably, processor 42 is additionally operable to the data that will not confirmed in uplink conventional PDCP window of sequence numbers by source base station Bag removes the PDCP sequence numbers of UE distribution, and the PDCP sequence numbers length used according to target BS is uplink conventional PDCP again The allocation of packets PDCP sequence numbers not confirmed in window of sequence numbers by source base station.Transmitter 41 is additionally operable to use what is redistributed PDCP sequence numbers reconfigure PDCP corresponding to the packet not confirmed in uplink conventional PDCP window of sequence numbers by source base station PDU, and the PDCP PDU reconfigured are sent to target BS.

Preferably, processor 42 is additionally operable to the remaining data bag in uplink conventional PDCP window of sequence numbers removing UE points The PDCP sequence numbers matched somebody with somebody, and the PDCP sequence numbers length used according to target BS is uplink conventional PDCP window of sequence numbers again Interior remaining data bag distribution PDCP sequence numbers.Transmitter 41 is additionally operable to reconfigure using the PDCP sequence numbers redistributed PDCP PDU corresponding to remaining data bag in the conventional PDCP window of sequence numbers of row, and by the PDCP PDU reconfigured send to Target BS.

Preferably, processor 42 is additionally operable to the remaining data bag in uplink extended PDCP window of sequence numbers removing UE points The PDCP sequence numbers matched somebody with somebody, and the PDCP sequence numbers length used according to target BS is uplink extended PDCP window of sequence numbers again Interior remaining data bag distribution PDCP sequence numbers.Transmitter 41 is additionally operable to reconfigure using the PDCP sequence numbers redistributed Row extension PDCP window of sequence numbers in remaining data bag corresponding to PDCP PDU, and by the PDCP PDU reconfigured send to Target BS.

Preferably, processor 42 be additionally operable to according to the origin identification of descending conventional PDCP window of sequence numbers determine it is descending often The border of PDCP window of sequence numbers and the border of downbound expansion PDCP window of sequence numbers are advised, according to uplink conventional PDCP sequence number windows The origin identification of mouth determines the border of uplink conventional PDCP window of sequence numbers and the border of uplink extended PDCP window of sequence numbers.

Preferably, user equipment also includes receiver 43.The receiver 43 receive source base station send switching command or Reconfiguration request, the switching command or reconfiguration request have descending conventional PDCP window of sequence numbers origin identification and it is up often Advise the origin identification of PDCP window of sequence numbers.

It will be understood by those skilled in the art that the composition structure shown in Figure 17 does not form the restriction to user equipment, It can include than illustrating more or less parts, either combine some parts or different parts arrangement.

In embodiments of the present invention, when UE needs to switch to without using extension from the source base station of the PDCP SN using extension PDCP SN target BS when, originating party sends unacknowledged packet in normal window to target BS, and by standard window Packet outside mouthful is sent to target BS, debit as new data packets abandons the packet outside normal window, or Originating party sends all packets in normal window to target BS, and using the packet outside normal window as new data Bag sends to target BS, debit and abandons the packet inside and outside normal window, for upstream data, originating party UE, debit For source base station, for downlink data, originating party is source base station, debit UE, can so be avoided in UE from using extension PDCPSN source base station is switched to without using during extended target base station the problem of existing data-bag lost.Simultaneously in source base station After switching over negotiation with target BS, source base station sends the origin identification for carrying up window and the starting of descending window to UE After the switching command of mark, base station handover operation is carried out again after source base station and UE progress data processings, so as to avoid UE not With existing handoff delay problem when being switched between the base station of version.

Those of ordinary skill in the art are further appreciated that all or part of step realized in above-described embodiment method is can To instruct the hardware of correlation to complete by program, described program can be stored in a computer read/write memory medium In, described storage medium, including ROM/RAM, disk, CD etc..

The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all essences in the present invention All any modification, equivalent and improvement made within refreshing and principle etc., should be included in the scope of the protection.

Claims

1. a kind of data processing method, it is characterised in that methods described includes：

When user equipment (UE) switches from source base station to target BS, the source base station is by descending conventional packet data convergence protocol Remaining data bag in the packet not confirmed in PDCP window of sequence numbers by the UE, and downbound expansion PDCP window of sequence numbers Send to the target BS, the remaining data in the downbound expansion PDCP window of sequence numbers includes the descending routine Packet in PDCP window of sequence numbers；

Wherein, the downbound expansion PDCP window of sequence numbers includes the descending conventional PDCP window of sequence numbers, the descending expansion It is identical with the original position of the descending conventional PDCP window of sequence numbers to open up PDCP window of sequence numbers；

The source base station will not be sent to described in the descending conventional PDCP window of sequence numbers by the UE packets confirmed Target BS, specifically include：

The source base station by the descending conventional PDCP window of sequence numbers not by the PDCP sequences of the UE packets confirmed Number it is converted into the sequence number for the PDCP sequence number length that the target BS uses；

The source base station sends the data not confirmed in the descending conventional PDCP window of sequence numbers by UE to the target BS The sequence number for the PDCP sequence number length that PDCP Service Data Units SDU corresponding to bag and the target BS use.

2. data processing method as claimed in claim 1, it is characterised in that also include：

The source base station sends the packet that the source base station in uplink conventional PDCP window of sequence numbers has received to the mesh Mark base station；With

The source base station abandons the remaining data bag in uplink extended PDCP window of sequence numbers, the uplink extended PDCP sequence numbers Remaining data in window includes the packet in the uplink conventional PDCP window of sequence numbers；

Wherein, the uplink extended PDCP window of sequence numbers includes the uplink conventional PDCP window of sequence numbers, the up expansion It is identical with the original position of the uplink conventional PDCP window of sequence numbers to open up PDCP window of sequence numbers.

3. data processing method as claimed in claim 1 or 2, it is characterised in that also include：

The PDCP sequence numbers of remaining data bag in the descending conventional PDCP window of sequence numbers are converted into institute by the source base station State the sequence number for the PDCP sequence number length that target BS uses, and by the residue in the descending conventional PDCP window of sequence numbers The sequence number for the PDCP sequence number length that PDCP SDU corresponding to packet and the target BS use is sent to the target Base station；

Wherein, the remaining data in the descending conventional PDCP window of sequence numbers includes the descending conventional PDCP sequence numbers The packet not confirmed by the UE in window.

4. data processing method as claimed in claim 1 or 2, it is characterised in that also include：

The bit of Serial No. 13 of the conventional PDCP window of sequence numbers, the Serial No. 14 of the extension PDCP window of sequence numbers Bit.

5. data processing method as claimed in claim 1 or 2, it is characterised in that also include：

The source base station determines the descending conventional PDCP sequences according to the origin identification of the descending conventional PDCP window of sequence numbers The border of row number window and the border of the downbound expansion PDCP window of sequence numbers；With

The source base station determines the uplink conventional PDCP sequence numbers according to the origin identification of uplink conventional PDCP window of sequence numbers The border of window and the border of uplink extended PDCP window of sequence numbers；

Wherein, the origin identification of the uplink conventional PDCP window of sequence numbers is that source base station does not receive described in upstream data The mark of first packet, the origin identification of the descending conventional PDCP window of sequence numbers is source base station described in downlink data Transmitted to the UE and not by the mark of the UE first packet confirmed.

6. data processing method as claimed in claim 5, it is characterised in that also include：

The source base station sends switching command to the UE, and the switching command has the uplink conventional PDCP window of sequence numbers Origin identification and the descending conventional PDCP window of sequence numbers origin identification.

7. data processing method as claimed in claim 6, it is characterised in that also include：

The source base station sends handover request to the target BS；

The source base station receives the handoff response that the target BS is sent, and there is the handoff response target BS not prop up Hold the information of the extension PDCP window of sequence numbers.

8. a kind of data processing method, it is characterised in that methods described includes：

After user equipment (UE) switches to target BS by source base station, the UE is by uplink conventional PDCP PDCP Remaining data bag in the packet not confirmed in window of sequence numbers by the source base station, and uplink extended PDCP window of sequence numbers Send to the target BS, the remaining data in the uplink extended PDCP window of sequence numbers includes the uplink conventional Packet in PDCP window of sequence numbers；

9. data processing method as claimed in claim 8, it is characterised in that also include：

The UE abandons the remaining data bag in downbound expansion PDCP window of sequence numbers, the downbound expansion PDCP window of sequence numbers Interior remaining data includes the packet in descending conventional PDCP window of sequence numbers；

Wherein, the downbound expansion PDCP window of sequence numbers includes the descending conventional PDCP window of sequence numbers, the descending expansion It is identical with the original position of the descending conventional PDCP window of sequence numbers to open up PDCP window of sequence numbers.

10. data processing method as claimed in claim 8, it is characterised in that the UE is by the uplink conventional PDCP sequences Do not sent to the target BS, specifically include by the packet that the source base station confirms in number window：

The UE turns the PDCP sequence numbers for the packet not confirmed in the uplink conventional PDCP window of sequence numbers by source base station Change the sequence number for the PDCP sequence number length that the target BS uses into；

The sequence number for the PDCP sequence number length that the UE uses according to the target BS reconfigures the up PDCP sequences PDCP Service Data Unit PDU corresponding to the packet not confirmed in row number window by source base station, and reconfigured described PDCP PDU are sent to the target BS.

11. data processing method as claimed in claim 10, it is characterised in that also include：

The PDCP sequence numbers of remaining data bag in the uplink conventional PDCP window of sequence numbers are converted into the mesh by the UE The sequence number for the PDCP sequence number length that mark base station uses, the sequence of the PDCP sequence number length used according to the target BS Number reconfigure PDCP PDU corresponding to the remaining data bag in the uplink conventional PDCP window of sequence numbers, and will described in again The PDCP PDU of construction are sent to the target BS；

Wherein, the remaining data in the uplink conventional PDCP window of sequence numbers includes the conventional PDCP window of sequence numbers The interior packet not confirmed by the source base station.

12. data processing method as claimed in claim 8, it is characterised in that also include：

The PDCP sequence numbers of remaining data bag in the uplink extended PDCP window of sequence numbers are converted into the mesh by the UE The sequence number for the PDCP sequence number length that mark base station uses, the sequence of the PDCP sequence number length used according to the target BS Number remaining data bag reconfigured in the uplink extended PDCP window of sequence numbers corresponds to PDCP PDU, and will described in structure again The PDCP PDU made are sent to the target BS；

Wherein, the remaining data in the uplink extended PDCP window of sequence numbers includes the conventional PDCP window of sequence numbers Interior packet.

13. data processing method as claimed in claim 8 or 9, it is characterised in that the UE is by the uplink conventional PDCP sequences Do not sent to the target BS, specifically include by the packet that the source base station confirms in row number window：

The UE will not remove the UE in the uplink conventional PDCP window of sequence numbers by the packet that the source base station confirms The PDCP sequence numbers of distribution, and the PDCP sequence numbers length used according to the target BS is the uplink conventional PDCP again The allocation of packets PDCP sequence numbers not confirmed in window of sequence numbers by the source base station, using the PDCP sequences redistributed Row number reconfigures PDCP corresponding to the packet not confirmed in the uplink conventional PDCP window of sequence numbers by the source base station PDU, and the PDCP PDU reconfigured are sent to the target BS.

14. data processing method as claimed in claim 13, it is characterised in that also include：

The UE removes the remaining data bag in the uplink conventional PDCP window of sequence numbers PDCP sequences of the UE distribution Number, and the PDCP sequence numbers length used according to the target BS is again in the uplink conventional PDCP window of sequence numbers Remaining data bag distributes PDCP sequence numbers, and the uplink conventional PDCP is reconfigured using the PDCP sequence numbers redistributed PDCP PDU corresponding to remaining data bag in window of sequence numbers, and the PDCP PDU reconfigured are sent to the mesh Mark base station；

Wherein, the remaining data in the uplink conventional PDCP window of sequence numbers includes the uplink conventional PDCP sequence numbers The packet not confirmed by the source base station in window.

15. data processing method as claimed in claim 8, it is characterised in that also include：

The UE removes the remaining data bag in the uplink extended PDCP window of sequence numbers PDCP sequences of the UE distribution Number, and the PDCP sequence numbers length used according to the target BS is again in the uplink extended PDCP window of sequence numbers Remaining data bag distributes PDCP sequence numbers, and the PDCP sequence numbers redistributed described in use reconfigure the uplink extended PDCP PDU corresponding to remaining data bag in PDCP window of sequence numbers, and the PDCP PDU reconfigured are sent to institute State target BS；

Wherein, the remaining data in the uplink extended PDCP window of sequence numbers includes the uplink conventional PDCP sequence numbers Packet in window.

16. the data processing method as described in claim 8 or 10, it is characterised in that also include：

The UE determines the descending conventional PDCP window of sequence numbers according to the origin identification of descending conventional PDCP window of sequence numbers Border and downbound expansion PDCP window of sequence numbers border；With

The UE determines the uplink conventional PDCP sequence numbers according to the origin identification of the uplink conventional PDCP window of sequence numbers The border of window and the border of the uplink extended PDCP window of sequence numbers；

17. data processing method as claimed in claim 16, it is characterised in that also include：

The UE receives switching command or the reconfiguration request that the source base station is sent, and the switching command or described reconfigure please Ask the starting of origin identification and the uplink conventional PDCP window of sequence numbers with the descending conventional PDCP window of sequence numbers Mark.

18. a kind of base station, it is characterised in that the base station includes：

Transmitting element, for when user equipment (UE) switches from the base station to target BS, descending conventional packet data to be converged Residue in the packet not confirmed in poly- agreement PDCP window of sequence numbers by the UE, and downbound expansion PDCP window of sequence numbers Packet is sent to the target BS, the remaining data in the downbound expansion PDCP window of sequence numbers include it is described under Packet in the conventional PDCP window of sequence numbers of row；

Converting unit, for by the descending conventional PDCP window of sequence numbers not by the PDCP sequences of the UE packets confirmed Row number is converted into the sequence number for the PDCP sequence number length that the target BS uses；

The transmitting element, it is additionally operable to true not by UE into the target BS transmission descending conventional PDCP window of sequence numbers The PDCP sequence number length that PDCP Service Data Units SDU corresponding to the packet recognized and the target BS obtained use Sequence number；

19. base station as claimed in claim 18, it is characterised in that

The transmitting element be additionally operable to by the packet that the base station has received in uplink conventional PDCP window of sequence numbers send to The target BS；

The base station also includes：

Discarding unit, for abandoning the remaining data bag in uplink extended PDCP window of sequence numbers, the uplink extended PDCP sequences Remaining data in row number window includes the packet in the uplink conventional PDCP window of sequence numbers；

20. the base station as described in claim 18 or 19, it is characterised in that

The converting unit is additionally operable to the PDCP sequence numbers of the remaining data bag in the descending conventional PDCP window of sequence numbers It is converted into the sequence number for the PDCP sequence number length that the target BS uses；

The transmitting element is additionally operable to PDCP corresponding to the remaining data bag in the descending conventional PDCP window of sequence numbers The sequence number for the PDCP sequence number length that SDU and the target BS obtained use is sent to the target BS；

21. the base station as described in claim 18 or 19, it is characterised in that the base station also includes：

First window determining unit, it is described descending for being determined according to the origin identification of the descending conventional PDCP window of sequence numbers The border of conventional PDCP window of sequence numbers and the border of the downbound expansion PDCP window of sequence numbers；With

Second window determining unit, for determining the uplink conventional according to the origin identification of uplink conventional PDCP window of sequence numbers The border of PDCP window of sequence numbers and the border of uplink extended PDCP window of sequence numbers；

Wherein, the origin identification of the uplink conventional PDCP window of sequence numbers be that base station does not receive described in upstream data the The mark of one packet, the origin identification of the descending conventional PDCP window of sequence numbers are base station described in downlink data to institute State UE transmission and not by the mark of the UE first packet confirmed.

22. base station as claimed in claim 21, it is characterised in that the transmitting element, be additionally operable to send switching to the UE Order, the switching command have the origin identification of the uplink conventional PDCP window of sequence numbers and the descending conventional PDCP sequences The origin identification of row number window.

23. base station as claimed in claim 22, it is characterised in that the transmitting element, be additionally operable to send out to the target BS Send handover request；

The base station, in addition to：

Receiving unit, the handoff response sent for receiving the target BS, the handoff response have the target BS The information of the extension PDCP window of sequence numbers is not supported.

A kind of 24. user equipment, it is characterised in that including：

Transmitting element, for after the user equipment switches to target BS by source base station, uplink conventional grouped data to be converged In the packet not confirmed in poly- agreement PDCP window of sequence numbers by the source base station, and uplink extended PDCP window of sequence numbers Remaining data bag is sent to the target BS, and the remaining data in the uplink extended PDCP window of sequence numbers includes institute State the packet in uplink conventional PDCP window of sequence numbers；

25. user equipment as claimed in claim 24, it is characterised in that also include：

Discarding unit, for abandoning the remaining data bag in downbound expansion PDCP window of sequence numbers, the downbound expansion PDCP sequences Remaining data in row number window includes the packet in descending conventional PDCP window of sequence numbers；

26. user equipment as claimed in claim 24, it is characterised in that also include：

Converting unit, for the PDCP sequences for the packet that will not confirmed in the uplink conventional PDCP window of sequence numbers by source base station Row number is converted into the sequence number for the PDCP sequence number length that the target BS uses；

First structural unit, for the sequence number of PDCP sequence number length that is used according to the target BS of acquisition again structure Make PDCP Service Data Units PDU corresponding to the packet not confirmed in the up PDCP window of sequence numbers by source base station；

27. user equipment as claimed in claim 26, it is characterised in that：

The converting unit, it is additionally operable to the PDCP sequence numbers of the remaining data bag in the uplink conventional PDCP window of sequence numbers It is converted into the sequence number for the PDCP sequence number length that the target BS uses；

First structural unit, it is additionally operable to the sequence number of PDCP sequence number length used according to the target BS of acquisition Reconfigure PDCP PDU corresponding to the remaining data bag in the uplink conventional PDCP window of sequence numbers；

28. user equipment as claimed in claim 24, it is characterised in that also include：

Converting unit, for the PDCP sequence numbers of the remaining data bag in the uplink extended PDCP window of sequence numbers to be converted into The sequence number for the PDCP sequence number length that the target BS uses；

First structural unit, described in the sequence number of the PDCP sequence number length for being used according to the target BS reconfigures Remaining data bag in uplink extended PDCP window of sequence numbers corresponds to PDCP PDU；

29. the user equipment as described in claim 24 or 25, it is characterised in that the user equipment also includes：

Weight subdivision, for will not removed in the uplink conventional PDCP window of sequence numbers by the packet that the source base station confirms The PDCP sequence numbers of the user equipment distribution, and the PDCP sequence numbers length used according to the target BS is described again The allocation of packets PDCP sequence numbers not confirmed in uplink conventional PDCP window of sequence numbers by the source base station；

Second structural unit, the PDCP sequence numbers for being redistributed according to acquisition reconfigure the uplink conventional PDCP PDU corresponding to the packet not confirmed in PDCP window of sequence numbers by the source base station；

30. user equipment as claimed in claim 29, it is characterised in that：

The heavy subdivision, it is additionally operable to the remaining data bag in the uplink conventional PDCP window of sequence numbers removing the user The PDCP sequence numbers of equipment distribution, and the PDCP sequence numbers length used according to the target BS is the uplink conventional again Remaining data bag distribution PDCP sequence numbers in PDCP window of sequence numbers；

Second structural unit, the PDCP sequence numbers for being additionally operable to redistribute according to acquisition reconfigure described up PDCP PDU corresponding to remaining data bag in conventional PDCP window of sequence numbers；

31. user equipment as claimed in claim 24, it is characterised in that also include：

Weight subdivision, for the remaining data bag in the uplink extended PDCP window of sequence numbers to be removed into the user equipment point The PDCP sequence numbers matched somebody with somebody, and the PDCP sequence numbers length used according to the target BS is the uplink extended PDCP sequences again Remaining data bag distribution PDCP sequence numbers in row number window；

Second structural unit, the PDCP sequence numbers for being redistributed according to acquisition reconfigure the uplink extended PDCP PDU corresponding to remaining data bag in PDCP window of sequence numbers；

32. the user equipment as described in claim 24 or 26, it is characterised in that also include：

First window determining unit, for determining the descending routine according to the origin identification of descending conventional PDCP window of sequence numbers The border of PDCP window of sequence numbers and the border of downbound expansion PDCP window of sequence numbers；With

Second window determining unit, it is described up for being determined according to the origin identification of the uplink conventional PDCP window of sequence numbers The border of conventional PDCP window of sequence numbers and the border of the uplink extended PDCP window of sequence numbers；

Wherein, the origin identification of the uplink conventional PDCP window of sequence numbers is that source base station does not receive described in upstream data The mark of first packet, the origin identification of the descending conventional PDCP window of sequence numbers is source base station described in downlink data The mark for first packet for transmitting to the user equipment and not confirmed by the user equipment.

33. user equipment as claimed in claim 32, it is characterised in that also include：

Receiving unit, for receiving switching command or the reconfiguration request that the source base station is sent, the switching command or described Reconfiguration request has the origin identification of the descending conventional PDCP window of sequence numbers and the uplink conventional PDCP sequence number windows The origin identification of mouth.