一种分布式的基于预留的多信道MAC协议  

A Distributed Reservation-based Multi-channel MAC Protocol in Wireless Sensor Networks

作　　者：甄雪 张闪闪 ZHEN Xue;ZHANG Shan-shan(School of Information Science and Engineering,Qufu Normal University,Rizhao 276826,China)

机构地区：[1]曲阜师范大学信息科学与工程学院

出　　处：《计算机技术与发展》2020年第1期54-59,共6页Computer Technology and Development

基　　金：国家自然科学基金(61672321)

摘　　要：无线传感器网络(wireless sensor networks,WSNs)已经广泛应用于各个领域。许多领域利用了周期性数据汇聚,传感器节点周期性地产生数据包,通过一系列中继节点传输到汇聚节点。提出了一种分布式的基于预留的多信道MAC协议,称为R-MMAC协议,其中利用了预留机制和多信道通信机制,在多信道条件下,每个节点传输数据包时都将预留下一个数据包的传输,根据接收信号强度指示(received signal strength indication,RSSI)值选择自己的最佳信道进行预留。另外,还提出了针对预留时发生冲突的解决算法,利用信干噪比(signal to interference and noise ratio,SINR)和数据包接收率(packet reception rate,PRR)得到了预留的传输时间,从而降低了传感器节点到汇聚节点的传输时延和未来数据包的冲突概率。利用OMNET++5.3仿真工具对R-MMAC协议、X-MAC和EM-MAC协议进行了比较,结果表明R-MMAC协议实现了更低的端到端时延。Wireless Sensor Networks(WSN)has been widely used in various fields.Periodic data aggregation is used in many fields.Sensor nodes generate data packets periodically and transmit them to sink nodes through a series of relay nodes.We propose a distributed reservation-based multi-channel MAC protocol called R-MMAC protocol.The reservation mechanism and the multi-channel communication mechanism are utilized.Under the multi-channel condition,each node will reserve the transmission of the next data packet when transmitting the data packet,and select its own optimal channel according to the received signal strength indication(RSSI).In addition,we propose a resolution algorithm for collision during reservation.The number of retransmissions is obtained by using the signal to interference and noise ratio(SINR)and the packet reception rate(PRR),thereby,the transmission delay of the sensor node to the sink node and the collision probability of the future data packet are reduced.We use the OMNET++5.3 simulation tool to compare the R-MMAC protocol,X-MAC and EM-MAC protocol,and the results show that the R-MMAC protocol achieves lower end-to-end delay.

关 键 词：无线传感器网络 多信道 MAC协议 时延 

分 类 号：TP31[自动化与计算机技术—计算机软件与理论]