关键词: IEEE 802.15.4, 无线传感器网, NS2仿真, 信标使能, 非信标使能

Abstract:

For the problem of how to improve the network transmission performance in wireless sensor networks, the paper proposes a scheme of using different transmission modes for different network topology structures. Based on the analysis of two different network structures: the “tree” structure and the “network” structure by the NS2 network simulation software, the delivery rate(packet loss rate), the average endtoend delay and the routing overhead are analysed for the two different network structures, and for the beaconless and beaconenabled operations. The experimental results show that the different network topology structures targeted by different transmission ways really can increase the transmission performance.

Key words: IEEE 802.15.4；wireless sensor networks；NS2 simulation；beaconless;beaconenabled