| 引用本文: | 唐宏伟,徐明,孙彩霞.THO-MAC:一种两跳优化的低延迟低功耗无线传感器网络介质访问控制协议.[J].国防科技大学学报,2014,36(1):161-166.[点击复制] |
| TANG Hongwei,XU Ming,SUN Caixia.THO-MAC: a low-latency and energy-efficient MAC protocol with two-hop optimization in WSNs[J].Journal of National University of Defense Technology,2014,36(1):161-166[点击复制] |
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| THO-MAC:一种两跳优化的低延迟低功耗无线传感器网络介质访问控制协议 |
| 唐宏伟, 徐明, 孙彩霞 |
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(国防科技大学 计算机学院，湖南 长沙 410073)
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| 摘要: |
| 功耗与延迟是无线传感器网络介质访问控制协议设计首要考虑的两个问题。提出了一种新的传感器网络低延迟、低功耗、接收节点初始化异步介质访问控制协议——THO-MAC协议。通过准确预测接收节点的唤醒时间，THO-MAC协议调度发送节点侦听信道，从而减少发送节点空闲侦听能量浪费。THO-MAC协议在发送节点两跳转发节点集中选择使报文两跳转发延迟最小的转发节点，从而降低报文传输延迟。使用NS2模拟器对THO-MAC协议进行了详细模拟。模拟结果显示，与RI-MAC和Any-MAC协议相比，THO-MAC协议可以减少35.5%和18%的报文传输延迟，同时节省23.5%和15.5%的节点功耗。 |
| 关键词: 无线传感器网络 介质访问控制协议 低功耗 低延迟 伪随机数发生器 |
| DOI：10.11887/j.cn.201401028 |
| 投稿日期：2013-05-03 |
| 基金项目:“天河”新一代高性能计算机系统研制资助项目(2012AA01A301);国家863计划资助项目 |
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| THO-MAC: a low-latency and energy-efficient MAC protocol with two-hop optimization in WSNs |
| TANG Hongwei, XU Ming, SUN Caixia |
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(College of Computer, National University of Defense Technology, Changsha 410073, China)
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| Abstract: |
| Energy consumption and latency are two major problems that are primarily considered in the design of medium access control (MAC) protocols in wireless sensor networks (WSNs). A new low-latency, energy-efficient and receiver-initiated asynchronous MAC protocol in WSNs is proposed. By precisely predicting the receiver’s wakeup time, THO-MAC protocol can schedule the sender to listen to the channel, such that it can reduce the sender’s energy waste of idle listening. On the other hand, in order to reduce packet delivery latency, THO-MAC protocol chooses the forwarders in the sender’s two-hop forwarders set to minimize the two-hop forwarding latency. The performance of THO-MAC protocol in terms of detailed NS2 simulation is evaluated. The simulation results show that the THO-MAC protocol reduces 35.5% and 18% packet delivery latency, while saving 23.5% and 15.5% sensor energy consumption, compared with RI-MAC and Any-MAC, the two state-of-the-art MAC protocols. |
| Keywords: wireless sensor networks medium access control protocol energy-efficient low latency pseudo-random number generator |
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