| 摘要 |
Embodiments of the present invention provide a clock synchronization method and device and a communications system. The method includes: determining, by a first node device in a network, a first master clock according to a first clock data set of the first node device and a first clock data set of another node device in the network, and synchronizing to the first master clock, where the first clock data set includes a first clock domain selection parameter of a node device; and determining, by the first node device, a second master clock according to a second clock data set of the first node device and a second clock data set of another node device that belongs to a same first node clock domain as the first node device does, and synchronizing to the second master clock, where the second clock data set includes a second clock domain selection parameter of a node device, and the node clock domain is a second clock domain. In the embodiments of the present invention, clock synchronization precision of a radio access network can be further improved. |
