一种新的光突发交换网络信令协议与分析

提出了一种新的光突发交换网络信令协议,即DSH区分服务混合信令.根据实时（电路仿真）业务和非实时（数据）业务对QoS的不同要求分别采用TAW和JET信令控制协议,尤其是对TAW信令做了相应改进,使之更适合于OBS网络承载电路仿真业务.利用电路仿真业务发出的呼叫请求,在端到端的波长通道中建立虚通路,并在整个呼叫持续过程中保持虚通路的连接,这样可以保证电路仿真业务的端到端时延最小并避免信息丢失.通过理论分析和系统仿真,研究了DSH混合信令的性能及其对波长利用率和实时业务呼损率的影响.

Analysis of a Novel Signaling Protocol for Optical Burst Switching Networks

A novel differentiated service hybrid (DSH) signaling protocol is proposed for optical burst switching (OBS) networks. In an OBS network, real-time (circuit emulation) traffic and non real-time (data) traffic are dealt respectively by TAW and JET protocol according to their different QoS requirements. TAW signaling is modified to adapt to the transport of circuit emulation traffic. A call request of circuit emulation traffic will be used to set up a virtual channel from a source to a destination before the traffic arrives at, and the virtual channel will be held until the call end. In this way, small end-to-end delay and low loss probability of data bursts will be achieved for accepted calls. By simulations and theoretic analysis, performances of DSH protocol and its effects on wavelength utilization of OBS network and call loss probability of circuit emulation traffics are investigated.