阅读说明：本技术 小区切换时的数据传输方法及装置 (Data transmission method and device during cell switching ) 是由 尤心 于 2019-08-23 设计创作，主要内容包括：本申请揭示了一种小区切换时的数据传输方法及装置。该方法包括：接收到小区切换命令后,在源小区内传输所述源小区的PDCP PDU；随机接入完成后,在目标小区内传输与未收到所述源小区的源基站确认的PDCP PDU对应的所述目标小区的PDCP PDU。本申请在随机接入完成,停止源小区内的上行传输后,通过将未收到源小区的源基站确认的PDCP PDU在目标小区内进行传输,从而确保小区切换过程中数据不会丢失,解决了当停止源小区内的上行传输时,会使未传输的或者已传输但未收到源基站确认的PDCP PDU无法继续传输,导致终端数据丢失的技术问题。(The application discloses a data transmission method and device during cell switching. The method comprises the following steps: after receiving a cell switching command, transmitting the PDCP PDU of the source cell in the source cell; and after the random access is finished, transmitting the PDCP PDU of the target cell corresponding to the PDCP PDU which is not confirmed by the source base station of the source cell in the target cell. After the random access is completed and the uplink transmission in the source cell is stopped, the PDCP PDU which is not received the confirmation of the source base station of the source cell is transmitted in the target cell, so that the data can not be lost in the cell switching process, and the technical problem that the PDCP PDU which is not transmitted or transmitted but not received the confirmation of the source base station can not be continuously transmitted to cause the data loss of the terminal when the uplink transmission in the source cell is stopped is solved.)

A data transmission method during cell switching is applied to terminal equipment, and is characterized in that the method comprises the following steps:

after receiving a cell switching command, transmitting the PDCP PDU of the source cell in the source cell;

and after the random access is finished, transmitting the PDCP PDU of the target cell corresponding to the PDCP PDU which is not confirmed by the source base station of the source cell in the target cell.

The method of claim 1, further comprising:

after receiving the cell switching command, generating the PDCP SDU of the PDCP PDU of the source cell, and generating the PDCP PDU with the same sequence number according to the PDCP configuration of the target cell.

The method as claimed in claim 2, wherein the step of transmitting the PDCP PDU of the target cell corresponding to the PDCP PDU acknowledged by the source base station of the source cell in the target cell after the random access is completed comprises:

acquiring a second sequence number, wherein the second sequence number is the sequence number of the PDCP PDU which is not confirmed by the source base station;

and transmitting the PDCP PDU with the sequence number same as the second sequence number in the PDCP PDUs generated according to the PDCP configuration of the target cell in the target cell.

The method as claimed in claim 1, wherein the step of transmitting the PDCP PDU of the target cell corresponding to the PDCP PDU acknowledged by the source base station of the source cell in the target cell after the random access is completed comprises:

acquiring PDCP SDUs and sequence numbers corresponding to PDCP PDUs which are not confirmed by a source base station of the source cell;

generating PDCP PDUs of the target cell with the same sequence numbers according to the PDCP configuration of the target cell;

and transmitting the PDCP PDU of the target cell in the target cell.

The method according to any of claims 1 to 4, wherein the non-reception of the PDCP PDUs acknowledged by the source base station of the source cell comprises: PDCP PDUs which are not transmitted in the source cell and/or PDCP PDUs which are transmitted in the source cell but not acknowledged by the source base station of the source cell.

The method of any of claims 1-5, wherein the cell handover command is an eMBB-based cell handover command.

A data transmission apparatus in cell handover, the apparatus comprising:

a configuration module, configured to generate PDCP PDUs of the source cell according to PDCP configuration of the source cell after receiving the cell switching command;

a transmission module, configured to transmit the PDCP PDU of the source cell in the source cell after receiving the cell switching command, and

and the base station is used for transmitting the PDCP PDU of the target cell corresponding to the PDCP PDU which is not confirmed by the source base station of the source cell in the target cell after the random access is finished.

The apparatus of claim 7, wherein the configuration module is further configured to:

after receiving the cell switching command, generating the PDCP SDU of the PDCP PDU of the source cell, and generating the PDCP PDU with the same sequence number according to the PDCP configuration of the target cell.

The apparatus of claim 8, wherein the transmission module is further configured to:

obtaining a second sequence number, wherein the second sequence number is a sequence number of a PDCP PDU that the source base station has not received confirmation, an

And transmitting the PDCP PDU with the sequence number same as the second sequence number in the PDCP PDUs generated according to the PDCP configuration of the target cell in the target cell.

The apparatus of claim 7, wherein the configuration module and the transmission module are further configured to:

the transmission module is used for acquiring PDCP SDU and sequence number corresponding to PDCP PDU which is not confirmed by the source base station of the source cell;

the configuration module is used for generating the PDCP SDU into the PDCP PDU of the target cell with the same sequence number according to the PDCP configuration of the target cell;

the transmission module is further configured to transmit the PDCP PDU of the target cell in the target cell.

A terminal device, the terminal device comprising: processor and memory, wherein the memory stores an uplink control channel transmission program operable on the processor, and the processor implements the data transmission method in cell handover according to any one of claims 1 to 6 when executing the uplink control channel transmission program.

A computer-readable storage medium, characterized in that it stores a computer program for electronic data exchange, wherein the computer program causes a computer to execute a data transmission method at cell handover according to any one of claims 1-6.

A computer program product, characterized in that the computer program product comprises a non-transitory computer-readable storage medium storing a computer program operable to cause a computer to perform the method of data transmission at cell handover according to any one of claims 1-6.

A chip, comprising: a processor for calling and running a computer program from a memory so that a device in which the chip is installed performs the data transmission method at the time of cell handover according to any one of claims 1 to 6.

A computer program, characterized in that the computer program causes a computer to execute the method of data transmission at cell handover according to any of claims 1-6.