Clock synchronization method, device and network element of wireless communication network

Abstract

The invention discloses a clock synchronization method, device and network element of a wireless communication network. The method includes the steps of receiving clock signals containing timing quality marks and sent by an upstream network element; detecting clock quality of the upstream network element according to the clock signals containing the timing quality marks; synchronizing a clock of the network element with a clock of the upstream network element when the clock quality of the upstream network element accords with preset requirements. According to the method, device and network element, the timing quality marks are added to the clock signals of the wireless communication network and are used for judging the quality level of the clock of the upstream network element, so the clock of the upstream network element is adopted for synchronization only when the quality level of the clock of the upstream network element meets the preset requirements. Therefore, the clocks can be accurately synchronized, the situation that a local high-level clock is synchronized by an external low-level clock is avoided, and replacement of reference clock sources can be quickly achieved.

Description

technical field [0001] The present invention relates to the technical field of wireless communication, in particular to a clock synchronization method, device and network element of a wireless communication network. Background technique [0002] Network synchronization and timing are important technologies in wireless communication systems. To ensure network quality, the system clock quality must meet specified standards. Since the wireless communication network usually relies on the transmission network to achieve timing transmission, in the case of traditional TDM transmission networking, the base station can recover the synchronous clock signal from the TDM E1 / T1 link (the timing can also be extracted from the STM-N line clock) , to meet the requirements of the reference clock of the base station, and constitute the service channel and synchronous timing link of the wireless communication network; as the transmission part of the wireless network develops from TDM to a pac...

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