Mobile communication system and method capable of performing delay compensation on in-band and out-of-band time synchronization interfaces respectively

Abstract

The invention discloses a mobile communication system and a mobile communication method capable of respectively compensating delays of an in-band time synchronization interface and an out-of-band time synchronization interface. According to the method, a time domain of a main time processing module is adjusted according to an in-band time synchronization adjusting signal and output through the in-band time synchronization interface; a real-time time constant signal time of data (TOD) of the main time processing module is output to the out-of-band time synchronization interface; a 1pulse per second (PPS) signal output interface of the main time processing module is connected to the out-of-band time synchronization interface via a 1588 precision time protocol transceiver; and 1588 precision time protocol transceiver adjusts the delay of a 1PPS signal according to an out-of-band time synchronization adjusting signal and output the 1PPS signal to the out-of-band time synchronization interface. The mobile communication system and the mobile communication method have the advantages that the out-of-band time synchronization interface of packet transport network equipment is isolated from the 1PPS clock signal of the main time synchronization processing module by using the 1588 precision time protocol transceiver, so that the adjustment of delay compensation of the out-of-band time synchronization interface and the in-band time synchronization interface cannot influence each other, thereby improving the precision of synchronization time of base stations.

Description

technical field [0001] The invention relates to time synchronization of a mobile communication network, in particular to a mobile communication system and method capable of performing delay compensation on in-band and out-of-band time synchronization interfaces respectively. Background technique [0002] Time synchronization is an important indicator of the mobile communication network, and it is the key to ensure the performance and quality of the mobile communication network. Therefore, in the existing mobile communication network, the time synchronization of the base station requires the time accuracy to be less than 3μs, and the frequency accuracy to meet + / -50PPb. [0003] The time synchronization transmission of the mobile communication network mainly has two ways: wireless and wired. The wireless method adopts satellite positioning system for time service, such as GPS in the United States, GLONASS in Russia, and Beidou system in China. The advantages of satellite tim...

AI Technical Summary

Problems solved by technology

[0006] The technical problem to be solved by the present invention is to solve the problem that the in-band and out-of-band time synchronization interfaces of the base station in the mobile communication network cannot perform delay compensation respectively

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