Velocity Based Latency Design for Wireless Sensor and Actuator Networks
One of the mechanisms to save energy in wireless sensor networks is the use of the listen-sleep modes at MAC layer, by which nodes are put to sleep as often as possible. However, long sleep time may cause additional latency and lower message delivery ratio, while sensor nodes communicate with mobile actuators in wireless sensor and actuator networks. For a specific period of listen-sleep cycle, this paper presents an approach which determines the proportion of the sleep time to the listen time. The focus is to offer the designers full flexibility in trading latency, message delivery ratio, mobile velocity and bandwidth versus each other. In addition, we propose a communication algorithm of sensor nodes and actuators for distributed wireless sensor and actuator networks, which could track the migrating actuators and forward messages to them. To reduce the energy consumption, sensor nodes turn off and turn on their radio periodically according to the time intervals determined by the evaluated latency. The simulation results show that between 10％ to 90％ energy savings can be achieved by our technique under different settings of several key system parameters, compared with the no-sleep mode operation.
Zhongwen Guo Ke Liu Xiaojuan Zhu Zhiguang Zhang
College of Information Science and Engineering Ocean University of China Qingdao, 266100, China
国际会议
南宁
英文
2007-07-20（万方平台首次上网日期，不代表论文的发表时间）