Clock self-synchronizing method in wireless communication network

Abstract

The invention discloses a clock self-synchronizing method in a wireless communication network, and provides a distributed clock frequency calibration method for nodes. The method includes the steps that each node sends a synchronizing sequence to a port at the frequency of the node, when a node in the network obtains the synchronizing sequence of the adjacent node through detection and analysis, and frequency difference between the node and the sending node can be estimated according to the correlation of the synchronizing sequence; if the frequency difference is smaller than a preset range, clock frequency adjustment is not conducted, otherwise, delta is adjusted upwards or downwards, and after a period of time, the clock frequencies of the whole network can be stabilized within a certain frequency difference range. According to the method, on the premise that the wireless communication network is not externally connected with a clock source, synchronizing of a network clock can be maintained through self-synchronizing of clocks among the nodes in the wireless communication network, and interconnection and interworking of the network are guaranteed.

Description

technical field [0001] The invention relates to a clock self-synchronization method in a wireless communication network, which is applied to a network system requiring clock synchronization in the field of wireless communication, especially a wireless self-organizing network system. Background technique [0002] Wireless communication networks can be divided into synchronous networks and asynchronous networks according to the way nodes access channels. Compared with asynchronous networks, synchronous networks have the advantages of high spectrum utilization, large system capacity, and high real-time performance, so they have been widely used. [0003] Clock synchronization is an important basis for synchronizing wireless communication networks, and is one of the core technologies for correct reception of wireless signals, time division multiple access, power control, and synchronous frequency hopping. Each node in the wireless communication network has an independent hardwar...

AI Technical Summary

Problems solved by technology

[0010] The purpose of the present invention is to provide a wireless communication network clock synchronization method and related devices to solve the problem caused by the large frequency difference between the node clocks in the wireless communication network that cannot correctly analyze the wireless signal and the frequency difference in the existing time synchronization method The problem of low time synchronization accuracy

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