摘要: 无线传感器网络媒体接触控制层存在2种冲突。提出基于概率的时隙选择算法,使不同节点在相同时隙发送概率不同,从而降低域内冲突。实验结果显示,该算法的有效能量和损失能量相比Sift协议节省了17.6%和43.9%,能量有效率提高了14.3%。提出染色预防算法,通过提前确定节点活动时序解决域间冲突问题。实验结果显示,该算法的节点平均睡眠时间在87%以上,空闲侦听导致的能量消耗仅占总能量的7%。
关键词:
媒体访问控制协议,
基于概率的时隙选择,
染色预防,
冲突避免,
无线传感器网络
Abstract: There are two kinds of collision in Medium Access Control(MAC) layer for dense Wireless Sensor Network(WSN). This paper proposes Probability-Based Slot Choice(PBSC) algorithm to solve intra-area collision, which chooses a transmitting slot based on probability. Experimental result shows that the algorithm attains a superior performance in effective energy and total energy by 17.6% and 43.9% compared with the Sift protocol. Coloring Precaution(CP) algorithm is proposes to solve inter-area collision, and the efficiency is improved by 14.3%. Because of low collision rate, average sleeping time is over 87% and energy for idle listening is below 7%.
Key words:
Medium Access Control(MAC) protocol,
Probability-Based Slot Choice(PBSC),
Coloring Precaution(CP),
collision avoidance,
Wireless Sensor Network(WSN)
中图分类号:
史文博;王继春;李 响. 密集型WSN冲突避免的MAC协议[J]. 计算机工程, 2010, 36(3): 99-102,.
SHI Wen-bo; WANG Ji-chun; LI Xiang. MAC Protocol with Collision Avoidance for Dense WSN[J]. Computer Engineering, 2010, 36(3): 99-102,.