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1. (WO2013123784) METHOD AND DEVICE FOR MAINTAINING SYNCHRONIZATION

Pub. No.:    WO/2013/123784    International Application No.:    PCT/CN2012/084764
Publication Date: Fri Aug 30 01:59:59 CEST 2013 International Filing Date: Sat Nov 17 00:59:59 CET 2012
IPC: H04W 56/00
Applicants: DATANG MOBILE COMMUNICATIONS EQUIPMENT CO.,LTD
大唐移动通信设备有限公司
Inventors: ZHONG, Xiancheng
钟显成
NI, Wei
倪伟
Title: METHOD AND DEVICE FOR MAINTAINING SYNCHRONIZATION
Abstract:
Disclosed are a method and device for maintaining synchronization, so as to realize accurate synchronization between devices in a long-distance transmission scenario. The method comprises: between two devices that are to be synchronized and are distant from each other, a sender multiplexing at least two kinds of synchronization control signals, and sending an obtained multiplexed signal to a receiver through an optical fiber; the receiver receiving, through the optical fiber, the multiplexed signal transmitted by the sender, performing de-multiplexing to obtain at least two kinds of synchronization control signals, and maintaining synchronization with the sender according to the two kinds of synchronization control signals. In this way, the multiplexed synchronization control signal is transmitted between the devices through the optical fiber, so as to effectively avoid attenuation of the synchronization control signal, thereby increasing the transmission distance of the synchronization control signal. Therefore, the synchronization control signal can also be accurately transmitted between devices distant from each other, so as to accurately realize synchronization therebetween, thereby ensuring system transmission performance.