The embodiment of the invention relates to a communication system and a time synchronization method and device in the system. The communication system comprises first, second digital subscriber line transceiver, second digital subscriber line transceiver device is used and the second digital subscriber line transceiver by means of time deviation of single pair high bit rate digital subscriber line SHDSL link to obtain first, second digital messages between line transceivers, by adjusting the local time and the time deviation to the first digital subscriber line transceiver maintain time synchronization; wherein, the first, second digital subscriber line transceiver using SHDSL frame synchronization clock on transmission layer and / or SHDSL symbol clock in the physical media layer transmission time and the reception time. The method provided by the embodiment of the invention can meet the requirement of synchronous synchronization of the mobile carrying time.
【技术实现步骤摘要】
【技术保护点】
1.一种通信系统,包括通过数字用户线连接的第一数字用户线收发装置和第二数字用户线收发装置,其特征在于,所述第一数字用户线收发装置和第二数字用户线收发装置中每一个数字用户线收发装置用于在传输汇聚层发送和接收SHDSL帧,在物理媒介相关层发送和接收SHDSL符号;所述第一数字用户线收发装置,用于在发送第一SHDSL帧时利用SHDSL帧同步时钟在所述第一SHDSL帧的特定比特或在发送第一SHDSL符号时利用SHDSL符号时钟在所述第一SHDSL符号的特定位置上标记第一发送时间;所述第二数字用户线收发装置用于在接收所述第一SHDSL帧时利用SHDSL帧同步时钟在所述第一SHDSL帧 ...
【技术特征摘要】
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【专利技术属性】
技术研发人员:冯儒洲,李飞,李东,徐贵今,
申请(专利权)人:华为技术有限公司,
类型:发明
国别省市:94[]
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