The embodiment of the invention provides a time synchronization method, device and DSL broadband access network system, the method includes: second devices to obtain the first device to send the first time the first time to send second device synchronization signal and the second equipment receives the first time synchronization signal first receiving time, and obtain second devices to send second the first time send second time synchronization signal and the first device receives the second time synchronization signal receiving second time; according to the first transmission time and the first time of receipt, and the second transmission time and second receiving time to calculate the clock offset between the second devices with the first device; according to the the clock offset is adjusted by the second device in time. Through the embodiment of the invention, the time synchronization in the digital subscriber line system can be realized, and the synchronization accuracy is high.
【技术实现步骤摘要】
【技术保护点】
1.一种时间同步方法,其特征在于,所述时间同步方法包括:第二设备获取第一设备向第二设备发送第一时间同步信号的第一发送时间Tm1和所述第二设备接收所述第一时间同步信号的第一接收时间Ts1、以及获取第二设备向第一设备发送第二时间同步信号的第二发送时间Ts2和所述第一设备接收所述第二时间同步信号的第二接收时间Tm2;根据所述第一发送时间Tm1和第一接收时间Ts1、以及所述第二发送时间Ts2和第二接收时间Tm2计算所述第二设备与所述第一设备之间的时钟偏移量;根据所述时钟偏移量调整所述第二设备的时间;其中,在传输汇聚子层中所述第一时间同步信号的第一预设比特读取本地时间来获取所述第一发 ...
【技术特征摘要】
【专利技术属性】
技术研发人员:徐贵今,刘建华,冯儒洲,龙国柱,
申请(专利权)人:华为技术有限公司,
类型:发明
国别省市:94[中国|深圳]
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