A direction-communication terminal timed synchronization method and apparatus

Abstract

The application discloses a direction-communication terminal timed synchronization method and apparatus. Each monitoring terminal updates a corresponding timing parameter and precision weight value thereof through monitoring surrounding master terminals and using channel sending timing parameters and timing precision weight values of the master terminals monitored. Through the adoption of the method and apparatus of the invention, timed synchronization of a direction-communication terminal can be realized without base station signal coverage in a terminal off-network direction-communication scene. The method and apparatus of the invention are applicable to the off-network direction-communication scene.

Description

technical field [0001] The present invention relates to mobile communication technology, in particular to a timing synchronization method and device for through terminals. Background technique [0002] Digital communication systems have very strict requirements on clock synchronization, especially in OFDM-based systems, if the timing is not accurate, it will cause serious (inter-symbol and sub-carrier) interference, making communication impossible. In the TD-LTE-based terminal off-net direct digital communication network, the requirement for synchronization is no exception. [0003] At present, in the ad hoc network based on the IEEE 802.11 standard, when the communication nodes communicate, they must not only maintain the signal synchronization during communication, but also effectively manage the clock synchronization during sleep and wake-up state transitions, so as to achieve further energy saving effects . To the ad hoc network that adopts TDMA to insert the way, cloc...

AI Technical Summary

Problems solved by technology

The main disadvantages of the mutual synchronization method include: each node generally needs to store and process the time information of a large number of neighboring nodes, and requires high storage and computing capabilities of the nodes

[0009] At present, no corresponding synchronization method has been proposed for the situation of no base station signal coverage in the TD-LTE-based terminal off-network direct connection scenario

However, due to the above-mentioned problems, the clock synchronization method of the existing self-organizing network cannot be directly applied to the terminal off-network direct connection scenario.

Images