北京邮电大学学报

  • EI核心期刊

北京邮电大学学报 ›› 2014, Vol. 37 ›› Issue (5): 26-30.doi: 10.13190/j.jbupt.2014.05.006

• 论文 • 上一篇    下一篇

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

黄胜, 李佳良, 李根, 李玲霞, 刘焕淋   

  1. 重庆邮电大学 光纤通信重点实验室, 重庆 400065
  • 收稿日期:2013-11-24 出版日期:2014-10-28 发布日期:2014-11-07
  • 作者简介:黄 胜(1974- ), 男, 副教授, E-mail: huangs@cqupt.edu.cn.
  • 基金资助:

    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)

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

HUANG Sheng, LI Jia-liang, LI Gen, LI Ling-xia, LIU Huan-lin   

  1. The Key Laboratory of Optical Fiber Communications Technology, Chongqing University of Posts and Telecommunications, Chongqing 400065, China
  • Received:2013-11-24 Online:2014-10-28 Published:2014-11-07

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.

关键词: 光突发交换, OL-IRA码, 在线, 丢包恢复

Abstract:

In order to guarantee high reliable service in optical burst switching(OBS)networks and reduce the end-to-end delay of bursts, an online burst encoding mechanism based on irregular repeat accumulate(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 constructed. 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.

Key words: optical burst switching, on line-irregular repeat accumulate codes, online, burst loss recovery

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