小规模、分布集中的WSNs(Wireless Sensor Networks,无线传感器网络)适宜采用平面路由协议,但在平面路由协议中,传统的洪泛路由算法以广播的方式在整个网络中传输查询请求和查询结果数据帧,消耗了较多的传感器节点能量,导致节点过早失...小规模、分布集中的WSNs(Wireless Sensor Networks,无线传感器网络)适宜采用平面路由协议,但在平面路由协议中,传统的洪泛路由算法以广播的方式在整个网络中传输查询请求和查询结果数据帧,消耗了较多的传感器节点能量,导致节点过早失效。论文对传统的洪泛路由算法进行改进,提出并实现了一种节能路由算法BRE-Flooding(Based on theRemaining Energy Flooding,基于剩余能量的洪泛算法)。在算法中,节点依据剩余能量决定是否接收和转发数据帧;节点维护由剩余能量、距离网络中聚合节点(Aggregation Node)的跳数等信息组成的邻居路由信息表,并依据数据帧中表示该查询请求关键程度的属性,结合邻居路由信息表动态确定向哪几个(或全部)邻居节点转发数据帧。经实验仿真,表明所提算法在节省节点能量消耗及网络负载均衡方面具有较好的表现。展开更多
We explored how to deploy P2P overlays in ultimately large-scale Mobile Ad-Hoc Networks (MANETs). We therefore studied the performance of P2P overlays such as Chord, creating a number of flat and hierarchical MANET ne...We explored how to deploy P2P overlays in ultimately large-scale Mobile Ad-Hoc Networks (MANETs). We therefore studied the performance of P2P overlays such as Chord, creating a number of flat and hierarchical MANET networks. The hierarchical network consists of clusters, interconnected by a backbone. The subnetworks (cluster or the whole network) ran OLSR as network-layer routing protocol. Each cluster had a gateway, interconnected through a backbone that deployed flooding. As we increased the number of clusters, we kept the number of nodes in the Chord overlay constant. Using simulations in OMNeT++, we evaluated the P2P performance. Our results show that an unmodified P2P network does not perform well even for relatively small network sizes. The performance can be improved through the use of a cross-layered P2P solution, such as OneHopOverlay4MANET. However, such cross-layered approaches require complete information about overlay nodes from the routing layer and are therefore not suitable in hierarchical MANETs. For hierarchical underlays, the performance of the P2P overlay deteriorated as we increased the number of clusters. One of the main reasons is that the backbone quickly became a performance bottleneck.展开更多
文摘小规模、分布集中的WSNs(Wireless Sensor Networks,无线传感器网络)适宜采用平面路由协议,但在平面路由协议中,传统的洪泛路由算法以广播的方式在整个网络中传输查询请求和查询结果数据帧,消耗了较多的传感器节点能量,导致节点过早失效。论文对传统的洪泛路由算法进行改进,提出并实现了一种节能路由算法BRE-Flooding(Based on theRemaining Energy Flooding,基于剩余能量的洪泛算法)。在算法中,节点依据剩余能量决定是否接收和转发数据帧;节点维护由剩余能量、距离网络中聚合节点(Aggregation Node)的跳数等信息组成的邻居路由信息表,并依据数据帧中表示该查询请求关键程度的属性,结合邻居路由信息表动态确定向哪几个(或全部)邻居节点转发数据帧。经实验仿真,表明所提算法在节省节点能量消耗及网络负载均衡方面具有较好的表现。
文摘We explored how to deploy P2P overlays in ultimately large-scale Mobile Ad-Hoc Networks (MANETs). We therefore studied the performance of P2P overlays such as Chord, creating a number of flat and hierarchical MANET networks. The hierarchical network consists of clusters, interconnected by a backbone. The subnetworks (cluster or the whole network) ran OLSR as network-layer routing protocol. Each cluster had a gateway, interconnected through a backbone that deployed flooding. As we increased the number of clusters, we kept the number of nodes in the Chord overlay constant. Using simulations in OMNeT++, we evaluated the P2P performance. Our results show that an unmodified P2P network does not perform well even for relatively small network sizes. The performance can be improved through the use of a cross-layered P2P solution, such as OneHopOverlay4MANET. However, such cross-layered approaches require complete information about overlay nodes from the routing layer and are therefore not suitable in hierarchical MANETs. For hierarchical underlays, the performance of the P2P overlay deteriorated as we increased the number of clusters. One of the main reasons is that the backbone quickly became a performance bottleneck.
