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研究并实现了几种光突发交换网络的关键技术,包括高速的突发组装技术、突发调度技术及突发光发射及接收技术等,其中突发接收具有较高的灵敏度和小于80 ns的时钟数据恢复时间.在这些技术的基础上,建立了一个灵活且可扩展的光突发交换网络实验平台.在OBS网络平台上进行了TCP性能评估实验和多QoS业务传输实验。实验结果表明光突发网络中丢包率严重影响其上TCP的性能,但若丢包率小于0.1%,则TCP性能可得到一定程度的保证.光突发交换网络实验平台上的TCP传输实验还表明了OBS物理层带来的额外延时对上层TCP带宽有极大的影响.实验结果还验证了OBS网络中的QoS保证机制.
Several key technologies of optical burst switching network are researched and implemented, including high-speed burst assembly technology, burst scheduling technology and burst optical transmission and reception technology. The burst reception has high sensitivity and less than 80 ns Based on these technologies, a flexible and scalable optical burst switching network experimental platform was set up.On OBS network platform, TCP performance evaluation experiments and multi-QoS service transmission experiments were carried out. Experimental results show that the packet loss rate in the optical burst network seriously affects the performance of TCP, but if the packet loss rate is less than 0.1%, the TCP performance can be guaranteed to some extent. The TCP transmission experiment on the optical burst switching network experimental platform It also shows that the additional delay caused by OBS physical layer has a great impact on the upper TCP bandwidth.The experimental results also verify the QoS guarantee mechanism in OBS network.