Data transmission method and device

Abstract

The invention relates to a data transmission method and device. The data transmission method and device are used for achieving that a transmitting terminal and a receiving terminal can still maintain consistency of superframe numbers of data packages with the same serial number under the condition that multiple data packages are lost continuously in the RLC UM data transmission process, and then the problem of encryption and decryption exceptions caused by the continuous loss of the multiple data packages in the data transmission process is solved, the follow-up voice encryption and decryption processes can be normally conducted, and the quality of user voice is improved. The data transmission method includes the steps that the transmitting terminal determines data packages to be transmitted, wherein the data packages carry the serial numbers of the data packages and the number of turnover times corresponding to the serial numbers of the data packages, and the number of turnover times is used for representing the number of use times of the serial numbers; the transmitting terminal transmits the data packages to the receiving terminal.

Description

technical field [0001] The present invention relates to the communication field, in particular to a data transmission method and device. Background technique [0002] Unacknowledged Mode (Unacknowledged Mode, UM) is a data transmission mechanism of the air interface radio link control layer (Radio Link Control, RLC), including the protocol header, sequence number (Sequence Number, SN) and length indication (Length Indicator, LI ) and other information, non-confirmation mode UM supports data segmentation, cascading, combining, reordering and other functions, without a feedback mechanism, UM is suitable for services that require high transmission delay but can tolerate some transmission errors, such as based on the Internet protocol ( Internet Protocol, IP) voice transmission (Voice over IP, VoIP), multimedia broadcast multicast service (Multimedia Broadcast Multicast Service, MBMS) and other services, these services can be encrypted or not, and the core network (Core Network,...

AI Technical Summary

Problems solved by technology

[0009] The present invention provides a data transmission method and device, which are used to realize that in the case of continuous loss of multiple data packets in the RLC UM data transmission process, the sending end and the receiving end can still maintain the superframe number of the data packet with the same serial number Consistency, and then solve the problem of abnormal encryption and decryption caused by the continuous loss of multiple data packets during data transmission, so that the subsequent voice encryption and decryption process can be carried out normally, improving the quality of user voice

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