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.)