Cooperative Routing Protocol Research Articles

A Novel Cooperative Routing Protocols in Ad hoc Networks and Performance Analysis

该文提出了一种新的Ad hoc网络协作路由方案，通过邻居节点的协同发射，多点接收及路径总功率的比较，形成一条多点协作的能量最小路径。在节点可以获知邻居节点相对位置的假设下，通过在路由请求报文中携带路径总功率和协作簇信息，分布式地实现了路由方案。仿真结果表明协作路由比传统非协作的路由能量效率有30~50%的改善，同时通过协作节点的选择，选择最有效的节点进行协同发射，在能量效率略有下降的同时，降低了协作控制的开销和计算的复杂度。

Robust cooperative routing protocol in mobile wireless sensor networks

In wireless sensor networks, path breakage occurs frequently due to node mobility, node failure, and channel impairments. It is challenging to combat path breakage with minimal control overhead, while adapting to rapid topological changes. Due to the Wireless Broadcast Advantage (WBA), all nodes inside the transmission range of a single transmitting node may receive the packet, hence naturally they can serve as cooperative caching and backup nodes if the intended receiver fails to receive the packet. In this paper, we present a distributed robust routing protocol in which nodes work cooperatively to enhance the robustness of routing against path breakage. We compare the energy efficiency of cooperative routing with noncooperative routing and show that our robust routing protocol can significantly improve robustness while achieving considerable energy efficiency.

Weighted cooperative routing for wireless mobile Ad-hoc network

A novel weighted cooperative routing algorithm (WCRA) is proposed in this article, which was on the basis of a weighted metric with maximal remaining energy (MRE) of the relays and the maximal received SNR (MRS) of the nodes. Moreover, a cooperative routing protocol was implemented on the basis of WCRA. Then simulation is done on network simulation (NS-2) platform to compare the performances of MRS, MRE and WCRA with that of noncooperative destination-sequenced destination-sequenced distance-vector (DSDV) protocol. The simulative results show that WCRA obtains a performance tradeoff between MRE and MRS in terms of delivery ratio and network lifetime, which can effectively improve the network lifetime at an acceptable loss of delivery ratio.