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一种综合IP层和WDM层资源的光网络动态路由优化模型及其性能研究 被引量:1
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作者 苏扬 徐展琦 刘增基 《计算机科学》 CSCD 北大核心 2006年第5期70-73,共4页
在分层图模型的基础上,本文提出一种以最小化全网光路总代价为优化目标的 IP over WDM 光网络动态路由优化模型,设计了一种针对该模型的在线综合路由算法—MCTLP(Minimizing the Cost of Total Lightpaths),MCTLP 通过综合考虑 IP 逻辑... 在分层图模型的基础上,本文提出一种以最小化全网光路总代价为优化目标的 IP over WDM 光网络动态路由优化模型,设计了一种针对该模型的在线综合路由算法—MCTLP(Minimizing the Cost of Total Lightpaths),MCTLP 通过综合考虑 IP 逻辑层带宽资源分配和 WDM 光物理层波长链路资源的占用以优化网络资源。与两种有代表性的 IP over WDM 光网络路由算法的性能仿真对比表明:MCTLP 能够在 IP 逻辑层和 WDM 光物理层都使用较少的链路以承载 IP 业务流,接纳更多的 IP 业务连接请求,有效地降低网络阻塞率。 展开更多
关键词 动态路由优化模型 在线综合路由算法 IP OVER WDM 光网络
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Ad Hoc网络先应式路由维护机制的优化模型研究 被引量:2
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作者 杨盘隆 田畅 《电子学报》 EI CAS CSCD 北大核心 2006年第1期114-117,共4页
Ad Hoc网络先应式路由算法(Proactive Routing Algorithm)具有寻由时延小,拓扑维护及时的优点,适合在网络负载较大的环境下高效运行.本文针对路由维护机制,以减少协议开销和寻由错误报文为目标,提出了基于Ad Hoc网络的先应式路由维护机... Ad Hoc网络先应式路由算法(Proactive Routing Algorithm)具有寻由时延小,拓扑维护及时的优点,适合在网络负载较大的环境下高效运行.本文针对路由维护机制,以减少协议开销和寻由错误报文为目标,提出了基于Ad Hoc网络的先应式路由维护机制优化模型.通过对优化模型的相关参数讨论,得出如下结论:1.先应式路由协议的最优更新时间周期具有“逆向稳定性”;2.节点数目n与更新系数h有比例关系n→h3/2.通过模型求解和仿真结果相比较,验证了模型的正确性.优化模型的研究为先应式路由算法更新机制和算法的可扩展性支持提供了理论依据. 展开更多
关键词 无线通信网络 移动AD HOC网络 先应式路由协议 路由算法优化模型 协议性能仿真
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Route optimization model for pedestrian evacuation in metro hubs 被引量:2
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作者 任刚 赵星 李岩 《Journal of Central South University》 SCIE EI CAS 2014年第2期822-831,共10页
The route optimization problem for road networks was applied to pedestrian flow.Evacuation path networks with nodes and arcs considering the traffic capacities of facilities were built in metro hubs,and a path impedan... The route optimization problem for road networks was applied to pedestrian flow.Evacuation path networks with nodes and arcs considering the traffic capacities of facilities were built in metro hubs,and a path impedance function for metro hubs which used the relationships among circulation speed,density and flow rate for pedestrians was defined.Then,a route optimization model which minimizes the movement time of the last evacuee was constructed to optimize evacuation performance.Solutions to the proposed mathematical model were obtained through an iterative optimization process.The route optimization model was applied to Xidan Station of Beijing Metro Line 4 based on the actual situations,and the calculation results of the model were tested using buildingExodus microscopic evacuation simulation software.The simulation result shows that the proposed model shortens the evacuation time by 16.05%,3.15% and 2.78% compared with all or none method,equally split method and Logit model,respectively.Furthermore,when the population gets larger,evacuation efficiency in the proposed model has a greater advantage. 展开更多
关键词 route optimization problem path impedance evacuation pedestrian flow metro hub
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