The performance of a Mobile Ad hoc Network (MANET) is closely related to the capability of the implemented routing protocol to adapt itself to unpredictable changes of topology network and link status. The Optimized L...The performance of a Mobile Ad hoc Network (MANET) is closely related to the capability of the implemented routing protocol to adapt itself to unpredictable changes of topology network and link status. The Optimized Link State Routing (OLSR) protocol is a one key of the proactive routing protocols for MANETs. It is based on the multi-point relays (MPRs) technique to reach all nodes in the network with a limited number of broadcasts. In this paper, we propose new versions of the original OLSR protocol based on a new mobility parameter, in the goal to enhance and adapt it in the presence of the mobility. For this objective we define new three criterions for MPRs selection. The first criteria take for selection, just the mobility of nodes at one-hop. The two others criterions are based on both mobility of nodes at one-hop and two-hops.展开更多
研究了移动Ad hoc网络中的一种典型先应式表驱动路由协议:RFC3626最优链路状态路由协议(Optimized Link State Routing Protocol,OLSR),指出了该协议对MPR(Multipoint Relays)集合选择算法会导致该集合可能存在过多的冗余节点的不足之处...研究了移动Ad hoc网络中的一种典型先应式表驱动路由协议:RFC3626最优链路状态路由协议(Optimized Link State Routing Protocol,OLSR),指出了该协议对MPR(Multipoint Relays)集合选择算法会导致该集合可能存在过多的冗余节点的不足之处,提出了一种改进的OLSR路由协议,通过对原MPR集合中节点的再次排序判断,除去了冗余节点。仿真结果表明:经过改进的OLSR在TC分组的发送数目、节点接受TC分组总数目、平均端到端延迟都得到了很大的改善,从而减少了TC分组的洪泛,提高了网络性能。展开更多
OLSR(Optimized Link State Routing Protocol,最优链路状态路由协议,RFC3626)协议是应用于MANET网络的一种先应式表驱动路由协议,其拓扑发现过程是实现有效通信的关键。本文提出了一种基于C++的OLSR协议拓扑发现的实现方案。该方案采...OLSR(Optimized Link State Routing Protocol,最优链路状态路由协议,RFC3626)协议是应用于MANET网络的一种先应式表驱动路由协议,其拓扑发现过程是实现有效通信的关键。本文提出了一种基于C++的OLSR协议拓扑发现的实现方案。该方案采用模块化面向对象设计方法,结合C++语言的特点使用了一些新的实现方法,主要完成了邻居侦测、链路侦测、MPR选举、HELLO消息处理、TC消息处理和拓扑计算等功能。展开更多
借助接收分组时测得的信号强度,提出OLSR-PSSA(Pre-rerouting and Signal Strength A-ware OLSR)改进协议。为了建立和维护生存时间更长、链路更加健壮的路由,并加入预切换路由机制,来适应节点的移动和网络拓扑结构的频繁变化。OPNET仿...借助接收分组时测得的信号强度,提出OLSR-PSSA(Pre-rerouting and Signal Strength A-ware OLSR)改进协议。为了建立和维护生存时间更长、链路更加健壮的路由,并加入预切换路由机制,来适应节点的移动和网络拓扑结构的频繁变化。OPNET仿真结果显示,与传统OLSR协议相比,OLSR-PSSA改进协议提升了传输成功率,增加了网络吞吐量。展开更多
无人机自组网路由协议OLSR(Optimized Link State Routing)在一些网络拓扑变化频繁的场景下,链路容易中断导致通信失败,数据包丢失,进而致使通信时延较高,影响网络性能。针对此问题,研究通过优化TC消息的数据包格式维护链路稳定性,以及...无人机自组网路由协议OLSR(Optimized Link State Routing)在一些网络拓扑变化频繁的场景下,链路容易中断导致通信失败,数据包丢失,进而致使通信时延较高,影响网络性能。针对此问题,研究通过优化TC消息的数据包格式维护链路稳定性,以及将最短路径的路由算法进行改进,以提高数据传输成功率,进而降低总时延。仿真结果表明,相较于OLSR协议,改进协议提高了发包成功率,降低了端到端时延。展开更多
文摘The performance of a Mobile Ad hoc Network (MANET) is closely related to the capability of the implemented routing protocol to adapt itself to unpredictable changes of topology network and link status. The Optimized Link State Routing (OLSR) protocol is a one key of the proactive routing protocols for MANETs. It is based on the multi-point relays (MPRs) technique to reach all nodes in the network with a limited number of broadcasts. In this paper, we propose new versions of the original OLSR protocol based on a new mobility parameter, in the goal to enhance and adapt it in the presence of the mobility. For this objective we define new three criterions for MPRs selection. The first criteria take for selection, just the mobility of nodes at one-hop. The two others criterions are based on both mobility of nodes at one-hop and two-hops.
文摘研究了移动Ad hoc网络中的一种典型先应式表驱动路由协议:RFC3626最优链路状态路由协议(Optimized Link State Routing Protocol,OLSR),指出了该协议对MPR(Multipoint Relays)集合选择算法会导致该集合可能存在过多的冗余节点的不足之处,提出了一种改进的OLSR路由协议,通过对原MPR集合中节点的再次排序判断,除去了冗余节点。仿真结果表明:经过改进的OLSR在TC分组的发送数目、节点接受TC分组总数目、平均端到端延迟都得到了很大的改善,从而减少了TC分组的洪泛,提高了网络性能。
文摘OLSR(Optimized Link State Routing Protocol,最优链路状态路由协议,RFC3626)协议是应用于MANET网络的一种先应式表驱动路由协议,其拓扑发现过程是实现有效通信的关键。本文提出了一种基于C++的OLSR协议拓扑发现的实现方案。该方案采用模块化面向对象设计方法,结合C++语言的特点使用了一些新的实现方法,主要完成了邻居侦测、链路侦测、MPR选举、HELLO消息处理、TC消息处理和拓扑计算等功能。
文摘借助接收分组时测得的信号强度,提出OLSR-PSSA(Pre-rerouting and Signal Strength A-ware OLSR)改进协议。为了建立和维护生存时间更长、链路更加健壮的路由,并加入预切换路由机制,来适应节点的移动和网络拓扑结构的频繁变化。OPNET仿真结果显示,与传统OLSR协议相比,OLSR-PSSA改进协议提升了传输成功率,增加了网络吞吐量。
文摘无人机自组网路由协议OLSR(Optimized Link State Routing)在一些网络拓扑变化频繁的场景下,链路容易中断导致通信失败,数据包丢失,进而致使通信时延较高,影响网络性能。针对此问题,研究通过优化TC消息的数据包格式维护链路稳定性,以及将最短路径的路由算法进行改进,以提高数据传输成功率,进而降低总时延。仿真结果表明,相较于OLSR协议,改进协议提高了发包成功率,降低了端到端时延。