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提出了一种光突发交换(OBS)环网控制协议———延迟光突发固定周期(DBFP)协议,它采用动态波长分插复用器(WADM),即采用波长可调发送可调接收(TTTR)机制,通过提前的光突发控制分组(BCP),为光突发数据分组(BDP)预留资源,并利用固定长度的光纤延迟线(FDL)将突发数据包延迟固定的时间,以便等待所有已经预留的突发数据包发送完毕,从而完全避免突发数据包冲突问题。仿真结果表明,延迟光突发固定周期协议能完全避免突发数据包冲突,同时有效地实现了波长统计复用、按需分配和空间重用,波长重用效率高达160%,从而提高链路利用率,特别适合于突发性的业务;并且延迟光突发固定周期协议所引入的时延为1ms左右,对业务的影响不大。
This paper proposes an optical burst switching (OBS) loop control protocol called Delayed Optical Burst Fixed Period (DBFP) protocol. It uses dynamic wavelength add / drop multiplexer (WADM) Receive (TTTR) mechanism to reserve resources for an optical burst data packet (BDP) by means of an advanced optical burst control packet (BCP) and to delay a burst of data packets with a fixed length of fiber delay line (FDL) Time in order to wait for all the burst packets that have been reserved to be sent, thus completely avoiding burst packet collision problems. The simulation results show that the delayed optical burst fixed-cycle protocol can completely avoid burst packet collision, effectively achieve the wavelength statistical multiplexing, on-demand allocation and spatial reuse, and the wavelength reuse efficiency is as high as 160%, thereby improving the link utilization , Especially suitable for sudden business; and the delayed delay introduced by the fixed cycle protocol of optical burst is about 1ms, which has little impact on the business.