一种无线传感器网络信道接入自适应占空比算法

无线传感器网络中MAC协议最重要的设计目标是减少能量消耗.*基于已有的低占空比工作方式,融入了"七折线"法和加权统计的思想,提出一种新的自适应占空比算法.分析与仿真结果表明,该算法在网络流量较小时,可有效降低空闲节点的占空比、减少能量消耗;并能预测节点下一周期的数据流量,调整其占空比,减少碰撞和阻塞发生的概率;尤其在任务突发模式下,能有效提高节点的数据吞吐量.

An Adaptive Duty-Cycle Algorithm for Channel Access in Wireless Sensor Networks

Energy conservation is the primary goal for MAC protocol design in Wireless sensor networks. Based on the analysis of the existing low-duty-cycle algorithms, an adaptive duty-cycle algorithm is proposed, which concerns with stability allowance and 7 segments algorithm. Analysis and simulation results show that, the new algorithm can reduce energy consumption and idle nodes duty-cycle, predict data throughput of next period, then adjust duty-cycle to reduce congestion. Especially, when the packets burst out, the new algorithm can improve throughput effectively.