Clock synchronization method and system in communication system

Abstract

The invention discloses a clock synchronization method and system. The clock synchronization method comprises the steps that a clock count sent by a master device two adjacent times and the clock count of a slave device at the time of second sending of the clock count are acquired; and the clock frequency deviation and the clock count deviation between master and slave devices, and a clock count correction value used to correct the clock count of the slave device are estimated based on the acquired clock counts, so as to carry out clock synchronization between the slave device and the master device. According to the clock synchronization method and system, the clock synchronization accuracy can be improved.

Description

technical field [0001] The present invention generally relates to the technical field of communication, and in particular to a clock synchronization method and system for the entire network at the media access layer or the network layer in the communication system. Background technique [0002] In a communication system, such as an 802.11 Wifi system, it is necessary to maintain clock synchronization at the media access layer or network layer, so that the system can schedule time slices for communication resources. [0003] This system includes a master controller and several slave devices. The master device periodically transmits clock information to the slave device. The slave device updates its own clock information according to the clock information received from the master device to maintain clock synchronization with the master device. With the clock synchronization of the whole network, the master device and the slave device can negotiate time slices for information e...

AI Technical Summary

Problems solved by technology

This method is very simple to implement, but the frequency of the clock is not corrected, so as time goes by, the values ​​of Timer_C and Timer_S will deviate greatly

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