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发明授权
CN104025701B 时钟切换方法、装置及直放站作为中继的室内分布式系统 有权

时钟切换方法、装置及直放站作为中继的室内分布式系统
摘要：
一种时钟切换方法、装置及采用直放站作为中继的室内分布式系统，包括：在采用直放站作为中继的室内分布式系统中，接收多业务接入单元MAU发来的数据码流；根据接收到的数据码流，判断由所述MAU提供的参考时钟是否处于正常状态；在判断出所述MAU提供的参考时钟未处于正常状态时，指示多业务扩展单元MEU由使用所述MAU提供的参考时钟对MEU和多业务远端单元MRU之间进行时间同步，切换到使用所述MEU自身提供的参考时钟对MEU和MRU之间进行时间同步。使用本申请这里提出的技术方案，能够较好地维护室内分布式系统中各设备之间的时间同步性，提高整个系统的可靠性。
摘要（英）：

Disclosed are a method and a device for switching clocks and a distributed indoor system using a repeater as relay, comprising: in the distributed indoor system using a repeater as relay, receiving a data code stream sent by a multi-service access unit MAU; according to the data code stream received, determining whether the reference clock provided by the MAU is in a normal state; and when it is determined that the reference clock provided by the MAU is not in the normal state, indicating the multi-service expansion unit MEU to perform a time synchronisation between the MEU and a multi-service remote unit MRU by using the reference clock provided by the MAU, and switching to time synchronisation between the MEU and the MRU by using the reference clock provided by the MEU itself. The technical solutions provided herein can better maintain the time synchronisation among the devices of a distributed indoor system, and improve the reliability of the whole system.

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