摘要
以多通道的随机多址无线传感器网络为研究对象,通过划分信息分组发送时间为1+a,1时间内以概率p检测,可侦听与控制信道节点数和休眠站点数,从而降低系统耗能,有效延长节点生命周期;a内用非坚持的控制方式,可减少信息分组发送的时延;通过负载均衡,保证系统的吞吐量;通过减少空闲检测时间和忙时发送的碰撞以节省能耗。由此,给出了一种新的随机多址无线传感器网络MAC协议。用平均周期法对系统进行建模,分析得到系统的吞吐量、多业务优先级的吞吐量以及信息分组发送时延等参数。计算机仿真实验结果与理论计算有较好一致性。
This paper presents a new CSMA protocol,known a probability detection and non-persistent joint control for multi-channel random multi-access（PDNMRM）.Throughput of system,throughput of different priority and packet delay are presented by theoretical calculations.The protocol controls the number of sleeping node by choosing the value of p,and makes system sleep in idle period.Simulation and analysis on PDNMRM,energy efficiency indicate that PDNMRM has a longer life cycle,and the theoretical analysis is correct and quite consistent with experimented result.
出处
《通信技术》
2011年第4期114-117,123,共5页
Communications Technology
关键词
概率检测
非坚持
联合控制
随机多址接入
无线传感器网络
multi-channel
random multi-access
probability detection
non-persistent
wireless sensor network
