To improve transmission rates in wireless sensor network and solve problems of interference,data anomalies,collision and congestion during clustered routing,a data transmission algorithm was proposed to optimize link quality.Applying cross layer design,introducing physical layer channel information,and reducing interference between clusters during data collection through random frequency hopping of each cluster.The priority of unusual data was defined to optimize slot allocation within clusters.With the access control in MAC layer,factors affecting inter-cluster transmission was considered and a competitive scheme was developed to avoid conflicts when multiple nodes access cluster heads.It compared data queues of accessing cluster heads and pre-reserved queues of receiving cluster heads to detect congestion.And the original routing was changed to solve congestion.Experimental results show that compared to LEACH,UCDTS and FPCRA algorithms,it effectively improves the data transmission quantity,the network life cycle and other indicators.
关键词
通信与信息系统/无线传感器网络/跨层设计/随机频率跳变/冲突避免/预留队列
Key words
communication and information system/wireless sensor network/cross-layer design/random frequency hopping/conflict avoidance/pre-reserved queue
维普
万方数据