一种新颖的光突发交换网络中高效传输实时业务的协议

A Novel Protocol for Effect Transmission of The Real Time Traffic in Optical Burst Switching Networks

提出一种光突发交换网络中高效传输低速实时业务的虚时分复用协议(VTDM_RT).该协议的特点是信道不划分固定时隙,实时业务请求寻找空闲位置周期性占用信道,核心结点无须缓存,按照约定周期性转发实时业务数据.理论近似分析和仿真表明,该协议可以有效降低实时业务呼损率和数据丢弃率;实时业务速率越低,呼损率越低,波长利用率越高.

A protocol called VTDM_RT is proposed for （）BS networks to support low rate real time traffic. No fixed-position time slot is defined for the channel. The real time service request will search for free positions of the channel and occupy the channel periodically,the core switch has no buffer,and will forward the real time traffic periodically. Approximate theoretical analysis and simulation show that the protocol can decrease the blocking probability and data loss rate. The lower the data rate is the lower the blocking probability and the higher the wavelength utilization.