适用于卫星光网络的改进CR-LDP  

Improved CR-LDP for satellite optical network

作　　者：庞成光 郭秉礼 周伟[2] 杨昌胜 傅天文 蒋明毅 王逸翔 刘奕廷 傅铭江 罗青松[3] PANG Chengguang;GUO Bingli;ZHOU Wei;YANG Changsheng;FU Tianwen;JIANG Mingyi;WANG Yixiang;LIU Yiting;FU Mingjiang;LUO Qingsong(School of Electronic Engineering,Beijing University of Posts and Telecommunications,Beijing 100089,China;School of Information andCommunication,Guilin University of Electronic Technology,Guilin Guangxi 541004,China;The 34th Research Institute of CETC,Guilin Guangxi 541004,China)

机构地区：[1]北京邮电大学电子工程学院,北京100089 [2]桂林电子科技大学信息与通信学院,广西桂林541004 [3]中国电子科技集团公司第三十四研究所,广西桂林541004

出　　处：《光通信技术》2022年第4期32-36,共5页Optical Communication Technology

基　　金：国家自然科学基金项目(批准号:61771074)资助。

摘　　要：针对空间激光骨干网中卫星链路采用高级在轨系统(AOS)帧进行数据传输、星上资源有限和数据传输时延较长等特点,为了在卫星光网络中实现标签交换和流量工程,首先对标准的基于路由受限标签分发协议(CR-LDP)进行了改进,包括对协议消息大小设置定长,设计面向无连接的传输层协议,减小协议开销和对双向标签交换路径(LSP)的建立流程进行改进,然后进行了软件仿真和硬件测试。结果表明:改进后的CR-LDP在建链时资源消耗更小,支持双向LSP建立且流程简单有效。In view of the characteristics of satellite link in space laser backbone network using advanced orbiting systems(AOS)frame for data transmission,limited on-board resources and long data transmission delay,in order to realize label switching and traffic engineering in satellite optical networks,the standard route based restricted label distribution protocol(CR-LDP)is impro-ved,including setting a fixed length for the size of protocol messages,designing a connectionless transport layer protocol,reducing protocol overhead and improving the establishment process of bidirectional label switching path(LSP),and then the software simulation and hardware test are carried out.The results show that the improved CR-LDP protocol has less resource consumption,supports bidirectional LSP establishment,and the process is simple and effective.

关 键 词：卫星光网络 星间激光链路 标签分发协议 流量工程 VXWORKS 

分 类 号：TN929.12[电子电信—通信与信息系统]