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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 reduce the end-to-end delay of burst while ensuring the high reliability of OBS network, a burst coding scheme based on Irregular Repeat Accumulation (IRA) The matrix structure of the check matrix is adjusted to obtain an OL-IRA code, which can be used to encode the burst online, and the information burst is encoded by the OL-IRA code, Redundant burst to recover lost information burst.The simulation results show that the OL-IRA code can significantly reduce the delay of packet loss while guaranteeing the recovery of packet loss.