关键词:无线传感器网络; 媒体访问控制协议; 空间相关性; 节点重要性
Node importance and spatial correlation-based MAC in WSN
LIU Fang-cai, ZHOU Si-wang, LI Lan
(College of Software, Hunan University, Changsha 410082, China)
Abstract:This paper proposed a new node importance and spatial correlation-based MAC protocol(NISC-MAC), which defined the smaller nodes interrelated, i.e., the nodes with great data difference, as the important nodes, and attributed it high priority. Those high priority nodes could send data with highly probability and backoff time shortly so that it was given highly priority in the competition to channel. And they could choose out the important nodes as the representative nodes, made sure those vital data send successfully to the sink node. This would ensure the overall effectiveness of data,made the data received reflect the real physical phenomenon. NISC-MAC is not onlyremoval of spatial correlation of data, but also to ensure the overall effectiveness of data; the simulation experiment indicates the protocol ensure the overall effectiveness of data under low energy consumption and transmission delay. ......