计算机工程 ›› 2010, Vol. 36 ›› Issue (3): 99-102,.doi: 10.3969/j.issn.1000-3428.2010.03.033

• 网络与通信 • 上一篇    下一篇

密集型WSN冲突避免的MAC协议

史文博,王继春,李 响   

  1. (中国科学技术大学计算机科学与技术系,合肥 230027)
  • 收稿日期:1900-01-01 修回日期:1900-01-01 出版日期:2010-02-05 发布日期:2010-02-05

MAC Protocol with Collision Avoidance for Dense WSN

SHI Wen-bo, WANG Ji-chun, LI Xiang   

  1. (Department of Computer Science and Technology, University of Science and Technology of China, Hefei 230027)
  • Received:1900-01-01 Revised:1900-01-01 Online:2010-02-05 Published:2010-02-05

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)

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