移动自组网基于方向机制LCR路由改进协议

Improved LCR Routing Protocol Based on Direction Mechanism in Mobile Ad hoc Networks

移动自组织网络中,由于节点的有限电量、高流动性和拓扑的频繁变化,路由是一个具有挑战性的问题,也使得网络管理、路由发现和不同的网络相关任务更加复杂。随着网络规模增加,通信负载会消耗更大比例的限制带宽,造成资源的浪费。其中,网络聚类是最具研究性的方法,选择能支持额外任务的合适节点,这样路由和组通信协议能在这种虚拟主干网之上高效地实现。提出了一种改进的LCR路由协议,一种为密集和大规模网络设计的分层路由协议。所提方法利用了方向机制,它限制了由路由的建立和保持所关联的区域,降低了路由任务中的控制阶段的数量。仿真结果表明,在不同场景中,所提改进协议大大地降低了能耗,并具有减少路由任务浪费带宽资源的能力。

In the mobile ad hoe network, due to limited power of nodes, high mobility and frequent changes of the topology, routing is a challenging problem, which makes the network management, routing discovery and various networking related tasks more sophisticated. As the network size increases, the traffic load tends to consume a larger proportion of the limited bandwidth, which leads to the waste of resource utilization. Network clustering is one of the most investigated approaches, which selects the appropriate nodes able to support additional tasks, so that routing and group communication protocols can be implemented efficiently on the top of this virtual backbone. An enhanced version of LCR is proposed in this paper, which is a hierarchical routing protocol designed for dense and large scale networks. The proposed approach uses the direction mechanism which limits the area concerned by the establishment and maintenance of routes, and consequently reduces the number of dominating nodes involved in routing tasks. Simulation results show that, in different scenarios, the proposed approach decreases the energy consumption, and has the ability to decrease wasted bandwidth resources used for routing tasks.