WO2013131319A1

WO2013131319A1 - Handover method and device, and data processing method and device

Info

Publication number: WO2013131319A1
Application number: PCT/CN2012/075373
Authority: WO
Inventors: 刘智鹏
Original assignee: 中兴通讯股份有限公司
Priority date: 2012-03-09
Filing date: 2012-05-11
Publication date: 2013-09-12
Also published as: CN103313325A; CN103313325B

Abstract

Provided are a handover method and device, and a data processing method and device. The handover method comprises: a source base station sending a handover request to a target base station, the handover request carrying an uplink serial number and/or a downlink serial number of a PDCP, and the source base station and the target base station adopting different radio access technologies; after receiving an acknowledge message of the target base station for the request, the source base station sending to the target base station data corresponding to the uplink serial number and/or the downlink serial number of the PDCP; and the source base station handing over UE to the target base station. The present invention solves the problem of data loss caused by different radio access technologies having different standards when handover is conducted between the different radio access technologies, thereby ensuring that there is no data loss during handover and increasing the network communication quality.

Description

TECHNICAL FIELD The present invention relates to the field of communications, and in particular to a handover method and apparatus, a data processing method, and an apparatus. BACKGROUND OF THE INVENTION Currently, an evolved UMTS Territorial Radio Access Network (EUTRAN) in order to provide users with an uninterrupted mobile user experience, a key feature that needs to be implemented is seamless switching. The Long Term Evolution (LTE) system supports this function not only to cover LTE cells of the same frequency, but also to cells using different frequencies, and cells of many other radio access technologies, however, in the evolution When switching between different radio access technologies between the incoming EUTRAN and the 2G/3G network, the standards of different radio access technologies are different, for example, used in different radio access technologies (Radio Access Technology, RAT for short). Packet Data Convergence Protocol (PDCP) has different serial number. When switching, the number of bits of the PDCP sequence number of the source access network and the target access network is different, and the target access network cannot obtain The source access network's PDCP sequence number, therefore, the target access network cannot be correctly Forwarding handover source access network after receiving the data, resulting in data loss occurs switch, reducing the quality of the communication network between different radio access technology. SUMMARY OF THE INVENTION The present invention provides a handover method and apparatus, a data processing method, and an apparatus, to at least solve the data caused by different standards of different radio access technologies when switching between different radio access technologies in the related art. Lost problem. According to an aspect of the present invention, a handover method is provided, including: a source base station sends a handover request to a target base station, where the handover request carries an uplink sequence number and/or a downlink sequence number of the PDCP, and the source base station and the target base station The radio access technology used is different. The source base station sends the data corresponding to the uplink sequence number and/or the downlink sequence number of the PDCP to the target base station after receiving the acknowledgment message from the target base station. The source base station will use the UE (User Equipment). , user equipment) Switch to the target base station. Preferably, the PDCP uplink sequence number is: Submode Dependent Convergence Protocol (abbreviated as Acknowledge Mode, abbreviated as AM) S DCP) The sequence number of the first unsuccessfully transmitted or unacknowledged PDU (Protocol Data Unit); The PDCP downlink sequence number is: In the determined mode, the PDCP/S DCP is sent to the upper sequence service data unit. (Service Data Unit, SDU for short) The next serial number of the serial number carried. According to another aspect of the present invention, a data processing method is provided, including: receiving, by a target base station, a handover request sent by a source base station, where the handover request carries an uplink sequence number and/or a downlink sequence of a packet data convergence protocol PDCP No. The radio access technology used by the source base station and the target base station is different; the target base station receives data corresponding to the uplink sequence number and/or the downlink sequence number of the PDCP sent by the source base station; and the target base station uses the radio access with the target base station. The uplink sequence number and/or the downlink sequence number of the PDCP that the technology matches, and the data is sent to the UE. Preferably, before the data is sent to the UE by the target base station using the uplink sequence number and/or the downlink sequence number of the PDCP that matches the radio access technology of the target base station, the data processing method further includes: the target base station adopts the following manner Converting the uplink sequence number and/or the downlink sequence number of the PDCP into a sequence number that matches the radio access technology of the target base station: The radio access technology of the source base station is Long Term Evolution (LTE), and the radio access technology of the target base station For the Global System for Mobile Communication (GSM) system, determine the lowest 10 locations of the 12-bit serial number of the data bearer in the source base station determining mode as a matching sequence number; if the wireless access technology of the source base station is LTE The radio access technology of the target base station is Time Division Synchronous Code Division Multiple Access (TD-CDMA), and the 12-bit serial number of the data bearer in the determining mode of the source base station is logically ANDed with 0xfi)0, and the obtained 16-bit number is obtained. As the matching sequence number; if the radio access technology of the source base station is GSM, and the radio access technology of the target base station is LTE, determining the source base station determines the mode The 10-bit serial number of the data bearer is logically ANDed with 0x300, and the obtained 12-bit number is used as the matching sequence number. If the radio access technology of the source base station is TD-CDMA, the radio access technology of the target base station is LTE, and the determination is made. The source base station determines the lower 12-bit number of the 16-bit serial number of the data bearer in the mode as the matching sequence number. Preferably, the PDCP uplink sequence number is: a sequence number of a first unsuccessful transmission or unacknowledged Protocol Data Unit (PDU) of the PDCP/subnetwork related convergence protocol S DCP in the acknowledge mode; PDCP The downlink sequence number is: In the determining mode, the PDCP/SNDCP sends the next sequence number of the sequence number carried by the sequence SDU of the upper layer. According to still another aspect of the present invention, a switching apparatus is provided, including: a first sending module, configured to send a handover request to a target base station, where the handover request carries an uplink sequence number of the packet data convergence protocol PDCP and/or Or the downlink sequence number, the radio access technology used by the source base station and the target base station is different; the second sending module is configured to: after receiving the acknowledgement message of the target base station to the request, the uplink sequence number and/or the downlink sequence with the PDCP The data corresponding to the number is sent to the target base station; and the handover module is configured to switch the UE to the target base station. Preferably, the PDCP uplink sequence number is: the sequence number of the first unsuccessful transmission or unacknowledged protocol data unit PDU of the PDCP/Subnet Related Convergence Protocol (S DCP) in the acknowledge mode; the PDCP downlink sequence number is: In the mode, the PDCP/S DCP sends the next sequence number of the sequence number carried by the sequence service data unit SDU of the upper layer. According to still another aspect of the present invention, a data processing apparatus is provided, including: a first receiving module, configured to receive a handover request sent by a source base station, where the handover request carries an uplink sequence number of a packet data convergence protocol PDCP And the downlink sequence number, the radio access technology used by the source base station and the target base station is different; the second receiving module is configured to receive data corresponding to the uplink sequence number and/or the downlink sequence number of the PDCP sent by the source base station; The three sending module is configured to send the data to the UE by using an uplink sequence number and/or a downlink sequence number of the PDCP that matches the radio access technology of the target base station. Preferably, the data processing apparatus further includes: a processing module, configured to convert the uplink sequence number and/or the downlink sequence number of the PDCP into a sequence number matching the radio access technology of the target base station by one of the following methods: The radio access technology is long-term evolution LTE, and the radio access technology of the target base station is Global System for Mobile Communications (GSM), and the lower 10 positions of the 12-bit serial number of the data bearer in the source base station determining mode are determined as matching sequence numbers; The radio access technology of the source base station is LTE, and the radio access technology of the target base station is time division synchronous code division multiple access (TD-CDMA), and the 12-bit serial number of the data bearer in the determining mode of the source base station is determined to be composed of 0xfi)0. The 16-digit number is used as the matching serial number; if the radio access technology of the source base station is GSM, and the radio access technology of the target base station is LTE, the 10-bit serial number of the data bearer in the source base station determining mode and the 12-bit 0x300 are determined. The number is used as the matching sequence number; if the radio access technology of the source base station is TD-CDMA, and the radio access technology of the target base station is LTE, determining the source base station in the determining mode According to the low 16-bit 12-digit serial number of the carrier as the matching serial number. Preferably, the PDCP uplink sequence number is: the sequence number of the first unsuccessful transmission or unacknowledged protocol data unit PDU of the PDCP/Subnet Related Convergence Protocol (S DCP) in the acknowledge mode; the PDCP downlink sequence number is: In the mode, the PDCP/SNDCP is sent to the next sequence number of the sequence number carried by the sequence service data unit SDU of the upper layer. In the present invention, the source base station sends the uplink sequence number and/or the downlink sequence number of the PDCP to the target base station by using the handover request, where the source base station and the target base station use different radio access technologies, and receive the target base station to send After the acknowledgment message is requested, the data corresponding to the uplink sequence number and/or the downlink sequence number of the PDCP is sent to the target base station. Therefore, the target base station can receive the source according to the received uplink sequence number and/or downlink sequence number of the PDCP. The data sent by the base station ensures that the target base station can correctly receive the data sent by the source base station, thereby completing the handover between the target base station and the source base station using the different radio access technologies, and solving the difference When switching between radio access technologies, data loss due to different standards of different radio access technologies ensures that data is not lost during handover, and the communication quality of the network is improved. BRIEF DESCRIPTION OF THE DRAWINGS The accompanying drawings, which are set to illustrate,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,, In the drawings: FIG. 1 is a flow chart of a handover method according to an embodiment of the present invention; FIG. 2 is a schematic diagram showing mobility of an EUTRAN system to a UTRAN system according to an embodiment of the present invention; FIG. 4 is a flowchart of a handover method by the EUTRAN system to the UTRAN system according to an embodiment of the present invention; FIG. 5 is a handover method of the handover from the UTRAN system to the EUTRAN system according to an embodiment of the present invention. Figure 6 is a block diagram showing the structure of a switching device according to an embodiment of the present invention; Figure 7 is a block diagram showing the structure of a data processing device according to an embodiment of the present invention; and Figure 8 is another data processing device according to an embodiment of the present invention. Block diagram of the structure. BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, the present invention will be described in detail with reference to the accompanying drawings. It should be noted that the embodiments in the present application and the features in the embodiments may be combined with each other without conflict. This embodiment provides a handover method. FIG. 1 is a flowchart of a handover method according to an embodiment of the present invention. As shown in FIG. 1, the handover method includes steps S102 to S106. Step S102: The source base station sends a handover request to the target base station, where the handover request carries the uplink sequence number and/or the downlink sequence number of the packet data convergence protocol PDCP, and the radio access technologies used by the source base station and the target base station are different. Step S104: After receiving the confirmation message of the request by the target base station, the source base station sends data corresponding to the uplink sequence number and/or the downlink sequence number of the PDCP to the target base station. Step S106: The source base station switches the UE to the target base station. The source base station sends the uplink sequence number and/or the downlink sequence number of the PDCP to the target base station by using the handover request, where the source base station and the target base station use different radio access technologies, and receive the request sent by the target base station. After the acknowledgment message, the data corresponding to the uplink sequence number and/or the downlink sequence number of the PDCP is sent to the target base station. Therefore, the target base station can receive the source base station according to the received uplink sequence number and/or downlink sequence number of the PDCP. The transmitted data ensures that the target base station can correctly receive the data sent by the source base station, thereby completing the handover between the target base station and the source base station using different radio access technologies, and solving the problem between different radio access technologies. When switching, data loss due to different standards of different wireless access technologies ensures that data is not lost during handover, and the communication quality of the network is improved. The terminal handover in the above embodiment is a mobility handover between different systems, for example, the EUTRAN system switches to the UTRAN system, that is, the terminal switches from the EUTRAN system to the UTRAN system, as shown in FIG. 2, the EUTRAN system and the 2G/ 3G UTRAN system mobility, target 3G RNC and BTS (Base Transceiver Station, referred to as base transceiver station) nodes are represented by a box, which is associated with the target SGSN (Serving GPRS Support Node, referred to as the Serving GPRS Support Node) Connected, standard-oriented Universal Mobile Telecommunications System (UMTS) Iu interface, Serving-Gateway (S-GW) as a local mobility management entity for data plane data bearer, control plane The NAS signaling is moved from the source service mobility management entity (Mobile Management Entity, MME for short) to the target SGSN based on the S3 interface; and for the user plane, the new data channel is established between the S-GW and the target SGSN based on the S4 interface. To ensure the continuity of packet transmission, once the handover is completed, the radio interface based on S1 user data and signaling The old resources and connections (indicated by dashed lines) will be released, user data and control signaling will be transmitted based on the newly established UMTS Iu interface. Of course, the handover from the UTRAN system to the EUTRAN system is also based on the S3 interface to implement control plane signaling. The transfer, and then through the new evolved Node B (evolved Node B) and the SI interface between the MME and the S-GW to complete the handover between different RATs. The above handover procedure is also applicable in the mobility for 2G/GPRS systems, since the SGSN exists in both the 2G and 3G packet core architectures. In order to ensure that the target base station can accurately receive the data sent by the source base station according to the uplink sequence number and/or the downlink sequence number of the PDCP, in the preferred embodiment, the PDCP uplink sequence number may be: In the acknowledge mode, the PDCP/S DCP The serial number of the first unsuccessfully transmitted or unacknowledged PDU; the PDCP downlink sequence number may be: In the determining mode, the PDCP/SNDCP is sent to the next sequence number of the sequence number carried by the upper layer sequential service data unit SDU. In the preferred embodiment, the PDCP uplink sequence number is the first unsuccessful transmission or not. The sequence number of the confirmed PDU is to ensure that the target base station can accurately receive the data sent by the terminal according to the PDCP uplink sequence number, and the PDCP downlink sequence number is the next sequence number of the serial number carried by the PDCP/S DCP to the upper SDU. To ensure that the target base station can accurately forward the data forwarded by the source base station to the target base station according to the PDCP downlink sequence number, and then forward the data to the terminal again, thereby improving the accuracy of data transmission. This embodiment provides a data processing method. As shown in FIG. 3, the data processing method includes steps S302 to S306. Step S302: The target base station receives the handover request sent by the source base station, where the handover request carries the uplink sequence number and/or the downlink sequence number of the packet data convergence protocol PDCP, and the radio access technologies used by the source base station and the target base station are different. Step S304: The target base station receives data corresponding to the uplink sequence number and/or the downlink sequence number of the PDCP sent by the source base station. Step S306: The target base station sends the data to the UE by using the uplink sequence number and/or the downlink sequence number of the PDCP that matches the radio access technology of the target base station. Through the foregoing steps, the target base station receives the uplink sequence number and/or the downlink sequence number of the PDCP sent by the target base station by using the handover request, where the source base station and the target base station adopt different radio access technologies, and receive the request sent by the source base station. After the target base station receives the data corresponding to the uplink sequence number and/or the downlink sequence number of the PDCP sent by the source base station, the target base station may send the source base station according to the uplink sequence number and/or the downlink sequence number of the received PDCP. The data ensures that the target base station can correctly receive the data sent by the source base station, and sends the data to the terminal according to the uplink sequence number and/or the downlink sequence number of the PDCP that matches the radio access technology of the target base station, thereby completing the data. The UE switches between the target base station and the source base station that use different radio access technologies, and solves the problem of data loss caused by different standards of different radio access technologies when switching between different radio access technologies. It ensures that no data is lost during the handover, which improves the communication quality of the network. In order to accurately transmit the data to the terminal, the target base station converts the uplink sequence number and/or the downlink sequence number of the PDCP sent by the source base station to be matched with the radio access technology of the target base station before transmitting the data to the UE. The serial number, in the preferred embodiment, provides a preferred conversion method. For example, when the radio access technology of the source base station is Long Term Evolution (LTE), the radio access technology of the target base station is Global System for Mobile Communications (GSM). Determining, in the source base station determining mode, the lower 10 position of the 12-bit serial number of the data bearer is a sequence number matching the radio access technology of the target base station; if the radio access technology of the source base station is LTE, the radio access of the target base station The technology is Time Division Synchronous Code Division Multiple Access (TD-CDMA), which determines that the 12-bit serial number of the data bearer in the source base station determining mode is logically ANDed with Oxfi)0, and the obtained 16-bit number is used as the wireless connection with the target base station. The serial number of the incoming technology match; if the radio access technology of the source base station is GSM, the radio access technology of the target base station is LTE, Determining that the 10-bit serial number of the data bearer in the source base station determining mode is logically ANDed with 0x300, and the obtained 12-bit number is used as the sequence number matching the radio access technology of the target base station; if the radio access technology of the source base station is TD- In CDMA, the radio access technology of the target base station is LTE, and the lower 12-bit number of the 16-bit serial number of the data bearer in the source base station determining mode is determined as the sequence number matching the radio access technology of the target base station. In the preferred embodiment, the uplink sequence number and/or the downlink sequence number of the PDCP sent by the source base station are converted into a sequence number that matches the radio access technology of the target base station, and the target base station is configured to send data to the terminal UE. Accuracy, at the same time, provides a method for converting the uplink sequence number and/or the downlink sequence number of the PDCP in various scenarios, which can meet the application requirements of different scenarios, thereby enhancing the applicability of the embodiment. In order to ensure that the target base station can accurately transmit data to the terminal according to the uplink sequence number and/or the downlink sequence number of the PDCP, in the preferred embodiment, the PDCP uplink sequence number can be: In the acknowledge mode, the PDCP/subnet related convergence The sequence number of the first unsuccessfully transmitted or unacknowledged PDU of the protocol S DCP; the PDCP downlink sequence number may be: In the determining mode, the PDCP/S DCP is sent to the upper sequence of the sequential service data unit SDU carrying the serial number A serial number. In the preferred embodiment, the PDCP uplink sequence number is the sequence number of the first unsuccessfully transmitted or unacknowledged PDU to ensure that the target base station can accurately receive the data sent by the terminal according to the PDCP uplink sequence number, and the PDCP downlink sequence number. The PDCP/SNDCP is sent to the next sequence number of the sequence number carried by the SDU of the upper layer to ensure that the target base station can accurately forward the data forwarded by the source base station to the target base station to the terminal according to the PDCP downlink sequence number, thereby improving the data. The accuracy of the delivery. The above preferred embodiments are described in detail below with reference to the accompanying drawings and examples. Example 1 In this example, a handover method by the EUTRAN system to the UTRAN system is taken as an example. As shown in FIG. 4, the handover method includes steps S402 to S420. Step S402: The source eNodeB makes a handover decision according to the real-time information, and prepares handover between different RATs. Step S404: The source eNodeB sends a handover request (Handover Required) to the source MME, where the handover request carries the uplink sequence number and/or the downlink sequence number of the PDCP, and indicates that the downlink data stored in the source eNodeB needs to be forwarded. Step S406: The source MME sends the session context and the uplink sequence number and/or the downlink sequence number of the source PDCP to the target SGSN by forwarding a Relocation Request. Step S408: The target SGSN sends a Relocation Request to the target RNC to request allocation of radio network resources, and sends the uplink sequence number and/or downlink sequence number of the source PDCP to the target RNC (Radio Network Controller, Radio Network Control). Device). Step S410: After completing the radio resource allocation, the target RNC returns a Relocation Request Acknowledge message to the target SGSN, and prepares to receive the downlink PDUs sent by the S-GW or the target SGSN. Step S412: The target SGSN sends a Forward Relocation Response (Forward Relocation Response) message to the source MME. In this process, the source eNodeB is still transmitting uplink and downlink user plane data (if there is data to be transmitted). Step S414: The source MME completes the preparation work before the handover, and sends a handover command message to the source eNodeB.

(Handover Command ). Step S416: The source eNodeB sends a handover command message to the UE, where the message includes relevant radio parameters and information that the target RNC has established in the preliminary preparation phase. Step S418: The source eNodeB forwards the downlink data of the uncompleted transmission or the unacknowledged (acknowledgement mode) directly to the target SGSN. Step S420: After receiving the handover command message sent by the eNodeB, the UE completes the handover process of the UE from the EUTRAN system to the UTRAN system. Example 2 In this example, a handover method that is switched from the UTRAN system to the EUTRAN system is taken as an example. As shown in FIG. 5, the handover method includes steps S502 to S520. Step S502: The source RNC makes a handover decision according to the real-time information, and prepares handover between different RATs. Step S504: The source RNC sends a relocation request to the source SGSN, where the relocation request carries the uplink sequence number and/or the downlink sequence number of the PDCP, and indicates that the downlink data stored in the source RNC needs to be forwarded. Step S506: The source SGSN sends the session context and the uplink sequence number and/or the downlink sequence number of the source PDCP to the target MME by forwarding the relocation request. Step S508: The target MME sends a handover request to the target eNodeB to establish a radio bearer, and sends the uplink sequence number and/or the downlink sequence number of the source PDCP to the target eNodeB. Step S510: After completing the establishment of the radio bearer, the target eNodeB sends a handover confirmation message to the target MME, and prepares to receive the downlink PDUs sent by the S-GW or the target MME. Step S512: The target MME sends a Forward Relocation Response message to the source SGSN. In this process, up to this step, the source SGSN is still transmitting uplink and downlink user plane data (if there is data to be transmitted). Step S514: The source SGSN completes the preparation work before the handover, and sends a handover command message to the source RNC. Step S516: The source RNC sends a handover command message to the UE, where the message includes relevant radio parameters and information that the target eNodeB has established in the preliminary preparation phase. Step S518: The source SGSN directly forwards the downlink data of the uncompleted transmission or the unacknowledged (acknowledgement mode) to the target eNodeB. Step S520: After receiving the handover command message sent by the source RNC, the UE completes the handover process of the UE from the UTRAN system to the EUTRAN system. The above switching method and data processing method can implement lossless handover of a terminal between a radio access technology of an Evolved Packet System (EPS) and a second generation (2G) and a third generation (3G) packet system, due to PDCP. /SNDCP sequence number reservation and logical forwarding, and forwarding of uplink and downlink data (retransmission), so that after the terminal switches to the new standard cell, the user data can still be sequentially transmitted based on the sequence number. Of course, the above replacement method The data processing method can be widely applied to data services with high delay tolerance. For this service, if a PDCP SDU is discarded, the data transmission rate may drop sharply, which seriously affects the communication quality of the network. . Embodiment 2 This embodiment provides a switching device. FIG. 6 is a structural block diagram of a switching device according to an embodiment of the present invention. As shown in FIG. 6, the switching device includes: a first sending module 602, configured to be directed to a target base station. Sending a handover request, where the handover request carries an uplink sequence number and/or a downlink sequence number of the packet data convergence protocol PDCP, and the source access station and the target base station adopt different radio access technologies; the second sending module 604 is connected to the A sending module 602 is configured to: after receiving the acknowledgement message of the target base station to the request, send data corresponding to the uplink sequence number and/or the downlink sequence number of the PDCP to the target base station; and the switching module 606 is connected to the second sending module. 604. Set to switch the UE to the target base station. In the foregoing embodiment, the first sending module 602 sends the uplink sequence number and/or the downlink sequence number of the PDCP to the target base station by using the handover request, where the source access station and the target base station adopt different radio access technologies, and receive the same. After the acknowledgment message of the request sent by the target base station, the second sending module 604 will perform the uplink sequence with the PDCP. The data corresponding to the column number and/or the downlink sequence number is sent to the target base station, and therefore, the target base station can be received according to the

The uplink sequence number and/or the downlink sequence number of the PDCP receive the data sent by the source base station, ensuring that the target base station can correctly receive the data sent by the source base station, so that the handover module 606 completes the target base station in which the UE adopts different radio access technologies. Switching between the source and the base station solves the problem of data loss caused by different standards of different radio access technologies when switching between different radio access technologies, thereby ensuring that data is not lost during handover, and the network is improved. Communication quality. The terminal handover in the above embodiment is, for example, the mobility of the EUTRAN system to the UTRAN system, that is, the terminal switches from the EUTRAN system to the UTRAN system, as shown in FIG. 2, the movement between the EUTRAN system and the 2G/3G UTRAN system. The target 3G RNC and Base Transceiver Station (BTS) nodes are represented by a box, which is connected to the target GPRS Service Support Node (SGSN), which is standard-oriented universal mobile. Communication System (Universal Mobile Telecommunications System, UMTS for short) Iu interface, Serving-Gateway (S-GW) is used as the local mobility management entity for data plane data bearer. The NAS signaling of the control plane is based on the S3 interface. The source service MME (Mobile Management Entity) moves to the target SGSN; and for the user plane, the new data channel is established between the S-GW and the target SGSN based on the S4 interface to ensure continuity of packet transmission once After the handover is completed, the old resources and connections on the radio interface based on S1 user data and signaling (indicated by dashed lines) Released, user data and control signaling will be transmitted based on the newly established UMTS Iu interface. Of course, the handover from the UTRAN system to the EUTRAN system is also based on the S3 interface to implement control plane signaling transfer, and then by creating a new eNodeB and MME. S1 interface between S-GWs to complete handover between different RATs. The above handover procedure is also applicable in the mobility for 2G/GPRS systems, since the SGSN exists in both the 2G and 3G packet core architectures. In order to ensure that the target base station can accurately receive the data sent by the source base station according to the uplink sequence number and/or the downlink sequence number of the PDCP, in the preferred embodiment, the PDCP uplink sequence number sent by the first sending module 602 can be: The sequence number of the first unsuccessfully transmitted or unacknowledged PDU of the PDCP/subnet related convergence protocol S DCP; the PDCP downlink sequence number sent by the first sending module 602 may be: In the determining mode, the PDCP/S DCP The next sequence number of the sequence number carried by the sequential service data unit SDU sent to the upper layer. In the preferred embodiment, the PDCP uplink sequence number is the sequence number of the first unsuccessfully transmitted or unacknowledged PDU, to ensure that the target base station can accurately receive the data sent by the terminal according to the PDCP uplink sequence number, and the PDCP downlink sequence number. The PDCP/SNDCP is sent to the next sequence number of the sequence number carried by the SDU of the upper layer to ensure that the target base station can accurately forward the data forwarded by the source base station to the target base station to the terminal according to the PDCP downlink sequence number, thereby improving the data. The accuracy of the delivery. The present embodiment provides a data processing apparatus. FIG. 7 is a structural block diagram of a data processing apparatus according to an embodiment of the present invention. As shown in FIG. 7, the data processing apparatus includes: a first receiving module 702, configured to receive a source base station. The handover request is sent, where the handover request carries the uplink sequence number and/or the downlink sequence number of the packet data convergence protocol PDCP, and the source access station and the target base station adopt different radio access technologies; the second receiving module 704 is connected to The first receiving module 702 is configured to receive data corresponding to the uplink sequence number and/or the downlink sequence number of the PDCP sent by the source base station, and the third sending module 706 is connected to the second receiving module 704, and configured to use the target base station. The uplink sequence number and/or the downlink sequence number of the PDCP matched by the radio access technology are sent to the UE by the data received by the second receiving module 704. In the foregoing embodiment, the first receiving module 702 receives the uplink sequence number and/or the downlink sequence number of the PDCP sent by the target base station by using the handover request, where the source access station and the target base station adopt different radio access technologies, and receive the same. After the request sent by the source base station, the second receiving module 704 receives the data corresponding to the uplink sequence number and/or the downlink sequence number of the PDCP sent by the source base station, and therefore, the target base station can be based on the received uplink sequence number of the PDCP and/or Or the downlink sequence number receives the data sent by the source base station, ensures that the target base station can correctly receive the data sent by the source base station, and the third sending module 706 selects the uplink sequence number of the PDCP according to the radio access technology of the target base station and/or The downlink sequence number sends data to the terminal, thereby completing handover between the target base station and the source base station using different radio access technologies, and solving the problem of different radio access technologies when switching between different radio access technologies The problem of data loss caused by different standards, thus ensuring no data loss during handover, improve The communication quality of the network. In order to accurately transmit the data to the terminal, as shown in FIG. 8, the data processing apparatus further includes: a processing module 708, connected to the second receiving module 704, configured to set the uplink sequence number and/or PDCP of the PDCP in one of the following manners. The downlink sequence number is converted into a sequence number that matches the radio access technology of the target base station: when the radio access technology of the source base station is Long Term Evolution (LTE), when the radio access technology of the target base station is the global mobile communication system GSM, Determining that the lower 10 position of the 12-bit serial number of the data bearer in the source base station determining mode is a sequence number that matches the radio access technology of the target base station; if the radio access technology of the source base station is LTE, the radio access technology of the target base station is Time division synchronous code division multiple access (TD-CDMA), determining that the 12-bit serial number of the data bearer in the source base station determining mode is logically ANDed with 0xfi)0, and the obtained 16-bit number is used as the radio access technology with the target base station. Matching sequence number; if the radio access technology of the source base station is GSM, and the radio access technology of the target base station is LTE, determining the data bearer of the source base station determining mode The 10-bit serial number is logically ANDed with 0x300, and the obtained 12-bit number is used as the serial number matching the radio access technology of the target base station; if the radio access technology of the source base station is TD-CDMA, the radio access technology of the target base station For LTE, the lower 12-bit number of the 16-bit serial number of the data bearer in the source base station determining mode is determined as the sequence number that matches the radio access technology of the target base station. In the preferred embodiment, the uplink sequence number and/or the downlink sequence number of the PDCP sent by the source base station are converted into a sequence number that matches the radio access technology of the target base station, and the target base station is configured to send data to the terminal UE. Accuracy, at the same time, The method for converting the uplink sequence number and/or the downlink sequence number of the PDCP in multiple scenarios is provided, which can meet the application requirements of different scenarios, thereby enhancing the applicability of the embodiment. In order to ensure that the target base station can accurately transmit data to the terminal according to the uplink sequence number and/or the downlink sequence number of the PDCP, in the preferred embodiment, the PDCP uplink sequence number can be: In the acknowledge mode, the PDCP/subnet related convergence The sequence number of the first unsuccessfully transmitted or unacknowledged PDU of the protocol S DCP; the PDCP downlink sequence number may be: In the determining mode, the PDCP/S DCP is sent to the upper sequence of the sequential service data unit SDU carrying the serial number A serial number. In the preferred embodiment, the PDCP uplink sequence number is the sequence number of the first unsuccessfully transmitted or unacknowledged PDU to ensure that the target base station can accurately receive the data sent by the terminal according to the PDCP uplink sequence number, and the PDCP downlink sequence number. The PDCP/SNDCP is sent to the next sequence number of the sequence number carried by the SDU of the upper layer to ensure that the target base station can accurately forward the data forwarded by the source base station to the target base station to the terminal according to the PDCP downlink sequence number, thereby improving the data. The accuracy of the delivery. Obviously, those skilled in the art should understand that the above modules or steps of the present invention can be implemented by a general-purpose computing device, which can be concentrated on a single computing device or distributed over a network composed of multiple computing devices. Alternatively, they may be implemented by program code executable by the computing device, such that they may be stored in the storage device by the computing device and, in some cases, may be different from the order herein. The steps shown or described are performed, or they are separately fabricated into individual integrated circuit modules, or a plurality of modules or steps are fabricated as a single integrated circuit module. Thus, the invention is not limited to any specific combination of hardware and software. The above is only the preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes can be made to the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and scope of the present invention are intended to be included within the scope of the present invention.

Claims

Claim

1. A switching method, comprising:

The source base station sends a handover request to the target base station, where the handover request carries an uplink sequence number and/or a downlink sequence number of the packet data convergence protocol PDCP, and the radio access technology adopted by the source base station and the target base station does not the same;

After receiving the acknowledgement message of the request by the target base station, the source base station sends data corresponding to the uplink sequence number of the PDCP and/or the downlink sequence number to the target base station;

The source base station switches the UE to the target base station.

2. The method according to claim 1, wherein the PDCP uplink sequence number is: the first unsuccessfully transmitted or unacknowledged protocol data unit of the PDCP/subnet related convergence protocol S DCP in the acknowledge mode The serial number of the PDU is: The PDCP downlink sequence number is: in the determining mode, the PDCP/S DCP sends the next sequence number of the sequence number carried by the sequence service data unit SDU of the upper layer.

3. A data processing method, including:

The target base station receives a handover request sent by the source base station, where the handover request carries an uplink sequence number and/or a downlink sequence number of the packet data convergence protocol PDCP, and the source base station and the target base station use the wireless connection Incoming technology is different;

Receiving, by the target base station, data corresponding to the uplink sequence number and/or the downlink sequence number of the PDCP, where the target base station uses the PDCP that matches the radio access technology of the target base station; The uplink sequence number and/or the downlink sequence number, and the data is sent to the UE.

The method according to claim 3, wherein the data is sent to the target base station by using an uplink sequence number and/or a downlink sequence number of the PDCP that matches a radio access technology of the target base station. Before the UE, the method further includes:

The target base station converts the uplink sequence number and/or the downlink sequence number of the PDCP into the sequence number that matches the radio access technology of the target base station by using one of the following methods: The radio access technology of the source base station is Long Term Evolution (LTE), and the radio access technology of the target base station is the global mobile communication system GSM, and the lower 10 positions of the 12-bit serial number of the data bearer in the determining mode of the source base station are determined as The matched serial number;

If the radio access technology of the source base station is the LTE, the radio access technology of the target base station is Time Division Synchronous Code Division Multiple Access (OFDM), and the 12 bits of the data bearer in the determining mode of the source base station are determined. The serial number is logically ANDed with 0xfi)0, and the obtained 16-digit number is used as the matching serial number;

If the radio access technology of the source base station is the GSM, and the radio access technology of the target base station is the LTE, determining that the 10-bit serial number of the data bearer in the source base station determining mode is logically ANDed with 0x300, a 12-digit number as the matching serial number;

If the radio access technology of the source base station is the TD-CDMA, and the radio access technology of the target base station is the LTE, determining that the source base station determines the lower 12 bits of the 16-bit serial number of the data bearer in the mode. The number is used as the serial number of the match.

The method according to claim 3 or 4, wherein the PDCP uplink sequence number is: the first unsuccessful transmission or unacknowledged protocol of the PDCP/subnet related convergence protocol S DCP in the acknowledge mode The serial number of the data unit PDU; the PDCP downlink sequence number is: in the determining mode, the PDCP/S DCP sends the next sequence number of the sequence number carried by the sequence service data unit SDU of the upper layer.

6. A switching device, applied to a base station, comprising:

The first sending module is configured to send a handover request to the target base station, where the handover request carries an uplink sequence number and/or a downlink sequence number of the packet data convergence protocol PDCP, where the source base station and the target base station use Wireless access technologies are different;

The second sending module is configured to: after receiving the confirmation message of the request by the target base station, send data corresponding to the uplink sequence number and/or the downlink sequence number of the PDCP to the target base station;

And a switching module, configured to switch the UE to the target base station.

The device according to claim 6, wherein the PDCP uplink sequence number is: the first unsuccessfully transmitted or unacknowledged protocol data unit of the PDCP/subnet related convergence protocol S DCP in the acknowledge mode The serial number of the PDU is: the PDCP downlink sequence number is: in the determining mode, the PDCP/SNDCP is sent to the next sequence number of the sequence number carried by the upper sequence service data unit SDU.

8. A data processing apparatus, applied to a base station, comprising:

The first receiving module is configured to receive a handover request sent by the source base station, where the handover request carries an uplink sequence number and/or a downlink sequence number of the packet data convergence protocol PDCP, where the source base station and the target base station adopt Wireless access technology is different;

The second receiving module is configured to receive data corresponding to the uplink sequence number and/or the downlink sequence number of the PDCP sent by the source base station;

The third sending module is configured to send the data to the UE by using an uplink sequence number and/or a downlink sequence number of the PDCP that matches the radio access technology of the target base station.

9. The device according to claim 8, further comprising:

The processing module is configured to convert the uplink sequence number and/or the downlink sequence number of the PDCP into the sequence number that matches the radio access technology of the target base station by using one of the following methods:

The radio access technology of the source base station is Long Term Evolution (LTE), and the radio access technology of the target base station is the global mobile communication system GSM, and the lower 10 positions of the 12-bit serial number of the data bearer in the determining mode of the source base station are determined as The matched serial number;

If the radio access technology of the source base station is the LTE, the radio access technology of the target base station is Time Division Synchronous Code Division Multiple Access (OFDM), and the 12 bits of the data bearer in the determining mode of the source base station are determined. a 16-digit number consisting of a sequence number and 0xfi)0 as the matched sequence number;

If the radio access technology of the source base station is the GSM, and the radio access technology of the target base station is the LTE, determining a 10-bit serial number of the data bearer in the source base station determining mode and 12 bits composed of 0x300 a number as the serial number of the match;

The device according to claim 8 or 9, wherein the PDCP uplink sequence number is: the first unsuccessful transmission or unacknowledged protocol of the PDCP/subnet related convergence protocol S DCP in the acknowledge mode The serial number of the data unit PDU; the PDCP downlink sequence number is: in the determining mode, the PDCP/S DCP sends the next sequence number of the sequence number carried by the sequence service data unit SDU of the upper layer.