摘要
空闲侦听是影响多跳无线传感器网络部署能效和寿命的关键因素。虽然当前的睡眠/唤醒调度协议能避免简单流量模式时的空闲侦听,但无法有效消除随机路由协议的复杂流量模式所导致的空闲侦听问题。提出一种基于伪随机的MAC协议(MAC-PR),减少了在节点上部署大量睡眠/唤醒调度信息所产生的额外开销。MAC-PR利用伪随机发生器的种子对调度信息进行编码,然后将该种子添加到传输中的数据报文,允许各个接收器/窃听器根据种子计算出它的睡眠/唤醒调度信息。MAC-PR通过额外计算有效避免了昂贵的控制报文传输成本。通过模拟及在TelosB节点上的实际部署,验证了MAC-PR可以有效消除空闲侦听问题,使得基于随机路由协议的数据报文传输具有自稳定、低延时、低成本等特征。
Idle-listening is the key factor for energy-efficiency and longevity of multi-hop wireless sensor network（WSN）de-ployments.While existing coordinated sleep/wakeup scheduling protocols eliminate idle-listening for simple traffic patterns, they are unsuitable to handle idle-listening by producing the complex traffic patterns of the random routing protocols.This pa-per presented a MAC protocol based on pseudo-random （MAC-PR）,which avoided the overhead of distributing complex,large sleep/wakeup scheduling information to the nodes.MAC-PR piggybacks onto the relayed data packets the seed of the pseudo-random generator that encoded the scheduling information,and enabled any recipient/snooper to calculate its sleep/wakeup schedule from this seed.In addition,MAC-PR trades off doing extra computation in order to avoid expensive control packet transmission cost.It shows through simulations and real implementation on TelosB motes that MAC-PR eliminates the idle-lis-tening problem,and makes the transmissions of data packets based on random routing protocal having those characteristics of self-stabilizing,low-latency,and low-cost relaying.
出处
《计算机应用研究》
CSCD
北大核心
2014年第11期3442-3446,3459,共6页
Application Research of Computers
基金
江西省自然科学基金资助项目(20142BAB207030)
江西省教育厅科技项目(GJJ14802)
关键词
无线传感器网络
空闲侦听
随机路由
睡眠/唤醒调度
报文传输
延时
wireless sensor network （ WSN ）
idle-listening
random routing
sleep/wakeup scheduling
packet transmis-sions
latency
