OBS网络支持优先级的分割及光缓存方法研究  

Research on priority supported burst segmentation and optical buffering in OBS networks

作　　者：戴腾蛟 

机构地区：[1]中南民族大学计算机科学学院,湖北武汉430074

出　　处：《光通信研究》2013年第6期4-7,共4页Study on Optical Communications

基　　金：国家民委自然科学基金资助项目(12ZNZ010);中央高校基本科研业务费专项资金资助项目(CTZ13024)

摘　　要：为了有效降低OBS(光突发交换)网络中突发包的丢失率,在多波长信道情况下,对现有的基于优先级与突发包分割的光缓存方法进行了研究和改进。改进后的方法结合优先级与分割机制,引入了一种交叉型光缓存结构来缓存被分割的冲突包,同时引入对空闲波长信道和光缓存延迟时间的判断来进一步确保低的数据丢失率。实验仿真结果表明,该方法可以有效降低突发数据包的丢失率,同时保证OBS网络中不同优先级业务的服务质量,从而提升整个网络的性能。In order to effectively reduce the burst loss probability of Optical Burst Switching （OBS） networks, the existing opti- cal buffering schemes based on priority and burst segmentation are studied and improved in the ease of multi-wavelength chan- nels. In the improved scheme combined with the priority and burst segmentation mechanism, a cross-type optical buffer struc- ture is introduced to buffer the segmented bursts and also the judgment of the idle channels and optical buffer delay time to en- sure lower packet loss rate. The simulation results show that this scheme can effectively reduce the packet loss rate and guaran- tee the QoS of different priorities in OBS networks, thus improving the performance of the entire network.

关 键 词：光突发交换 优先级 光缓存 分割 丢失率 

分 类 号：TN915[电子电信—通信与信息系统]