PTN承载高精度时间同步协议技术研究

Analysis of Precision Time Synchronication Protocal in PTN

对于时分同步码分多址(TD-SCDMA)和时分长期演进(TD-LTE)无线系统,采用全球定位系统(GPS)提供时间同步具有施工难、成本高和不安全等弊端。利用同步协议通过光纤系统传输高精度时间同步信号将是主流技术。文章对采用分组传送网(PTN)承载IEEE1588v2提供时间同步的精度影响因素进行了分析,通过实验和试点测试初步验证了PTN承载1588v2提供高精度时间同步信号的可行性,并比较了PTN承载1588v2的不同模式。

For Time Division-Synchronous Code Division Multiple Access（TD-SCDMA） and Time Division Long Term Evolution（TD-LTE） wireless systems,using a global positioning system（GPS） to provide time synchronization is problematic.In these wireless systems,GPS is costly,difficult to deploy,and insufficiently secure.Nowadays,transportation of high precision time/phase synchronization signals through Precision Time Protocol（PTP） fiber systems has become mainstream technology.This paper analyzes the main factors affecting the performance of time synchronization through Packet Transport Network（PTN） carrying IEEE 1588v2.In light of laboratory and field trial tests,the possibility of transporting high precision time/phase synchronization signal through PTN carrying 1588v2 is proven.Finally,this paper compares the different models of 1588v2 in PTN.