城域时间同步专网建设方案探讨

无线网络中一般采用GPS/北斗双模卫星接收系统获取时间同步信息，为避免基站仅依赖GPS传递时间同步信号，带来的网络安全性隐患，因此1588v2专网的部署对时间信号的传递尤为重要。本文重点介绍时间服务器的北斗一代接收机的改造升级，及城域1588v2地面链路时间同步专网的部署方案。针对PTN over 光纤和PTN over OTN两种场景，分别介绍1588v2时间同步专网的部署方案，以达到高效利用已有资源、减少投资、降低专网部署难度的目的。

Discussion on metro time synchronization private network construction plan

In wireless network, GPS / BeiDou dual-mode satellite receiving system is generally used to obtain time synchronization information. In order to avoid the hidden danger of network security caused by the base station only relying on GPS to transmit time synchronization signal, the deployment of 1588v2 special network is particularly important for the transmission of time signal. This paper focuses on the transformation and upgrading of Beidou first generation receiver of time server, and the deployment scheme of man 1588v2 ground link time synchronization private network. Aiming at PTN over optical fiber and PTN over OTN, the deployment scheme of 1588v2 time synchronization private network is introduced respectively, so as to achieve the purpose of efficient use of existing resources, reduce investment and reduce the difficulty of private network deployment.