Clock synchronization method, communication device and communication equipment

Abstract

The embodiment of the invention provides a clock synchronization method, a communication device and communication equipment. The method comprises the following steps: enabling terminal equipment to receive first time information from network equipment; receiving a downlink signal from the network device; sending an uplink signal to the network device; receiving second time information from the network equipment, wherein the second time information is used for determining a receiving moment when the network equipment receives the uplink signal; determining a sending moment of the downlink signal according to the reference time point and a time sequence relationship between the uplink signal and the downlink signal; and determining the clock skew of the terminal equipment according to the sending moment and the receiving moment of the downlink signal and the sending moment and the receiving moment of the uplink signal. The sending moment of the synchronization message is calculated through the terminal device, the network device does not need to carry the sending moment of the synchronization message by sending the following message to the terminal device, time-frequency resources ina wireless network are saved, and the complexity of scheduling the time-frequency resources by the network device is reduced.

Description

technical field [0001] The present application relates to the technical field of communication, and in particular to a clock synchronization method, a communication device and a communication device. Background technique [0002] In a wireless network, different terminal devices need to have the same time system, that is, the terminal devices need to keep their clocks synchronized. [0003] In the prior art, an achievable way for terminal devices to maintain clock synchronization is: the network device sends a downlink signal to the terminal device, the network device records the first moment when it sends the downlink signal, and the terminal device records the second moment when it receives the downlink signal ; The terminal device sends an uplink signal to the network device, the terminal device records the third moment when it sends the uplink signal, and the network device records the fourth moment when it receives the uplink signal; The clock deviation of the local cl...

AI Technical Summary

Problems solved by technology

When the network device corresponds to multiple terminal devices, the network device needs to send a downlink signal to each network device, and after sending the downlink signal, send time information corresponding to the first moment to each network device, so that the network device needs to A large number of time-frequency resources are configured, resulting in a large time-frequency resource overhead in the wireless network, which increases the complexity of network equipment scheduling time-frequency resources.

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