移动自组织网络中基于节点平均队列长度的拥塞检测路由改进协议

THE IMPROVED PROTOCOL OF CONGESTION DETECTION BASED ON NODES'AVERAGE QUEUE LENGTH IN AD HOC NETWORK

移动自组织网络中,由于节点的有限电量、动态性和拓扑的频繁变化等挑战,可能在任何中间节点发生拥塞,进而导致高丢包率、长延迟和资源的浪费。提出一种动态拥塞检测方法,其基于节点上平均队列长度。节点检测当前的拥塞程度,并对其邻居发送一条警告消息。然后邻居尝试寻找一条到达目的的无拥塞替代路径,确保MANET内可靠的通信。仿真结果表明,所提方法表现出更好的性能。

In mobile ad hoc network,due to limited power,dynamicity and topology＇s frequent changes of nodes,congestion may occur in any intermediate node,and then leads to high packet loss,long delay and resource waste. In this paper we propose a dynamic congestion detection method,which is based on the average queue length at node. A node detects the present congestion level and sends a warning message to its neighbours. The neighbours then try to locate a congestion-free alternative path to the destination,and ensure the reliable communication within the MANET. Simulation results show that the proposed method demonstrates better performance.