Research Of Power Control And QoS Routing Protocol In Ad Hoc Network

In recent years,Ad Hoc networks have been rapidly developed in the field of wireless communications because they do not require the use of fixed infrastructure and independent networking features,and are widely used in emergency communications such as military and rescue.Due to the frequently changing topological structure of Ad hoc networks,the routing problem is crucial.At the same time,since the mobile terminals in Ad Hoc networks are usually powered by batteries and the traffic volume is increasing,designing a power control and routing protocol with QoS guarantee has important application value.In the AODV routing protocol,the nodes often use the maximum transmission power in the data forwarding process,and do not adjust the transmission power according to the actual conditions of the neighbor nodes and the network,resulting in waste of node power and increased energy consumption.In addition,the AODV routing protocol only selects neighbor nodes with the minimum hop count criteria,and may choose to forward frequent center nodes so that the energy of the center node runs out prematurely.Therefore,according to this situation,the neighbors with higher residual energy are selected.Nodes,avoiding the energy-depleted central node for data forwarding,can reduce the problem of disconnection caused by the depletion of node energy.Secondly,since bandwidth is an important guarantee for achieving QoS,and the path length has a certain constraint on the end-to-end delay,the objective function is to choose the bandwidth and path length in QoS guarantee,and further select the nodes to improve the network performance to forward data.Finally,the improved AODV routing protocol is simulated by NS2 simulation software,and compared with the traditional AODV routing protocol.The simulation results show that the improved AODV routing protocol has exhausted nodes,packet delivery rate and average.End-to-end delays,normalized routing costs,etc.have all improved.