The Optimized Link State Routing(OLSR)is a widely used routing technique in Mobile Ad Hoc Networks(MANET),where HELLO messages are exchanged regularly to obtain node neighbor status and perceive link conditions with neighbors.A novel optimized link state routing(SA-OLSR)based on node silence activation mechanism is proposed to address the issue of OLSR being applied in battlefield information networks that are prone to interference,causing nodes to continuously send a large amount of redundant HELLO in-formation with limited transmission resources,resulting in increased routing overhead.This protocol is divided into two modules:HELLO information receiving and sending.By analyzing the time of the last HELLO packet received by the node,it perceives the current network environment conditions of the node,determines whether the node needs to enter a silent state,and changes the sending time interval of HELLO packets to optimize the sending frequency of HELLO information.We use OPNET to establish a simulation platform to simulate interference in the network environment,and compare and analyze SA-OLSR,OLSR,and AODV commonly used in MANET at present.The simulation results show that compared to traditional OLSR,SA-OLSR can reduce nearly 10%of HELLO packet control overhead in interference networks and reduce the probability of long-term congestion in the network;compared with AODV,SA-OLSR has a lower average latency and relatively stable latency fluctuations.At the same time,it can greatly increase the throughput of the network.
关键词
OLSR/邻居监听算法/战场信息网络/MANET/HELLO消息
Key words
OLSR/neighbor monitoring algorithm/battlefield information network/MANET/HELLO message
维普
万方数据