Synchronous communication method and terminal

Abstract

A synchronous communication method, the method includes: a first terminal acquires first configuration information, and the first configuration information includes a first parameter; the first terminal determines the current time in a device-to-device D2D communication system according to a global navigation satellite system (GNSS) clock Corresponding transmission time slot; the first terminal judges whether the current moment is the synchronization information transmission time according to the transmission time slot and the first parameter; if so, the first terminal sends the direct link synchronization information at the synchronization information transmission time, and the direct connection link The synchronization information carries indication information, the direct link synchronization information is used to synchronize the second terminal with the first terminal, and the indication information is used to indicate to the second terminal that the first terminal is a synchronization source using a GNSS clock.

Description

technical field [0001] The invention relates to the communication field, in particular to a synchronous communication method and a terminal. Background technique [0002] With the continuous development of society, the popularity of cars is getting higher and higher. While driving travel brings convenience to people's travel, it also brings a certain negative impact on human society. The rapid increase in the number of vehicles has caused urban traffic congestion, A series of problems such as frequent traffic accidents and poor environmental quality. According to statistics, there were nearly 200,000 traffic accidents in China in 2013, resulting in 58,000 deaths and a direct economic loss of 1.04 billion yuan. A complete set of intelligent transportation system (Intelligent TransportationSystem, ITS). At present, ITS has naturally become a hot spot in the world. [0003] Currently, vehicles can obtain road condition information or receive information services in a timely ...

AI Technical Summary

Problems solved by technology

[0006] In the prior art, when a terminal outside the coverage area is used as a synchronization source to send a synchronization signal, different synchronization sources are likely to be out of synchronization, and the out-of-synchronization of the two synchronization sources will cause the two synchronization sources to overlap The receiving terminals under the network are not synchronized, which will affect the communication between the two receiving terminals, and there may be problems of being unable to communicate with each other or missing hearing, which seriously affects the communication performance.

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