摘要
能耗和采集延时都是无线传感器网络批量数据采集应用的重要指标。在LEMR-multichannel的基础上提出一种基于跨层设计的双路径采集协议EEDP(Energy-Efficient Dual-Path)。通过在MAC层进行适当的时槽和信道分配,EEDP把整个网络划分成两棵独立的采集树,结合动态路径选择,EEDP使具有冗余路径的节点可以利用双路径进行数据传输,有效降低采集延时。另外,EEDP结合二次竞争和RTS/CTS的方法解决了LEMR-multichannel在解决隐藏终端问题上的不足。仿真结果表明,与LEMR-multichannel相比,EEDP有效减少了批量数据的采集延时,并获得了更低的能耗。
Energy Consumption and collection latency are both essential for bulk-data collection in wireless sensor networks. In this paper,we propose a cross-layer designed collection protocol EEDP（Energy-Efficient Dual-path）. By properly assigning the time slot and channel, EEDP divides the whole network into two collection trees. With the dynamic path selection mechanism in EEDP,a node which has redundant paths can use two paths to collect data so that reduce collection latency. We also propose a new scheme that combines twice-contention and RTS/CTS method to solve the problem of the LEMR-multichannel on handling hidden terminal. The simulation results show that, EEDP can achieve lower collection latency than LEMR-muhichannel while consuming less energy.
出处
《传感技术学报》
CAS
CSCD
北大核心
2013年第9期1270-1275,共6页
Chinese Journal of Sensors and Actuators
基金
江苏省基础研究计划重点研究专项项目(BK2011018)
