星载光电混合SDH交换的设计与实现  

Design and implementation of spaceborne optoelectronic hybrid SDH switching

作　　者：崔涛[1] 黎军[1] 呼延烺[1] 张怡[1] CUI Tao;LI Jun;HUYAN lang;ZHANG Yi(National Key Laboratory of Science and Technology on Space Microwave,China Academy of Space Technology（Xi＇an）,Xi＇an 710100,China)

机构地区：[1]中国空间技术研究院西安分院空间微波技术重点实验室,西安710100

出　　处：《光通信技术》2018年第9期22-25,共4页Optical Communication Technology

基　　金：国家某项目资助

摘　　要：针对星载光电混合交换中大颗粒度光业务难以直接进行小颗粒度电业务分发的问题,提出一种星载光电混合SDH交换方法。分析了星载光电混合SDH交换的关键技术,通过采用并行帧同步方法对SDH系统进行同步,提高系统同步的稳定性,并对VC-4和VC-3统一进行时隙划分以适应同一数字交叉连接矩阵交换需求,减少星上硬件资源的消耗。仿真结果表明,该方案适于星上应用。Aiming at the problem that large granularity optical services in the on-board mixed optical/electrical switching are difficult to directly distribute small granularity electrical services, a SDH-based on-board mixed optical/electrical switching method is proposed. The key technologies of SDH switching are analyzed,the parallel frame synchronization method is used to synchronize the SDH system and improve the stability of system synchronization. And the VC-4 and the VC-3 are unified to divide the time slots to meet the requirements of the same digital cross-connect（DXC） matrix switch to reduce the consumption of hardware resources on the satellite. The simulation results show that this solution is suitable for on-board applications.

关 键 词：光电混合 SDH交换 同步 数字交叉连接 

分 类 号：TP393[自动化与计算机技术—计算机应用技术] TN929.11[自动化与计算机技术—计算机科学与技术]