光突发交换网络中面向低时延高可靠业务的突发编码机制  

Burst Encoding Mechanism for Low Delay and High Reliable Service in Optical Burst Switching Networks

作　　者：黄胜[1] 李佳良[1] 李根[1] 李玲霞[1] 刘焕淋[1] 

机构地区：[1]重庆邮电大学光纤通信重点实验室,重庆400065

出　　处：《北京邮电大学学报》2014年第5期26-30,共5页Journal of Beijing University of Posts and Telecommunications

基　　金：国家自然科学基金项目(61071117;61171158;61275077);重庆市自然科学基金项目(cstc2013jcyjA40052;cstc2012jjA40060);重庆市教委项目(KJ130515)

摘　　要：为了保证光突发交换(OBS)网络中业务高可靠性的同时,降低突发的端到端的时延,提出了一种基于不规则重复积累(IRA)码的突发编码机制.对IRA码校验矩阵结构进行了一定的调整,得到一种能对突发进行在线编解码的在线不规则重复累积(OL-IRA)码.利用OL-IRA码对信息突发进行编码,以便用产生的冗余突发来恢复丢失的信息突发.仿真结果表明,OL-IRA码在保证恢复丢包能力的同时,也能明显缩短丢包恢复的时延.In order to guarantee high reliable service in optical burst switching（OBS） networks and re- duce the end-to-end delay of bursts, an online burst encoding mechanism based on irregular repeat accu- mulate（IRA） codes was proposed. The parity-check matrix of IRA codes was adjusted into a special structure, and then an on line IRA （OL-IRA） code which can encode and decode burst online was con- structed. Information data bursts are encoded by OL-IRA codes to recover lost bursts with redundant bursts. Simulations show that OL-IRA codes will guarantee the performance of burst loss recovery, and can also shorten the delay of burst loss recovery.

关 键 词：光突发交换 OL-IRA码 在线 丢包恢复 

分 类 号：TN929.11[电子电信—通信与信息系统]