基于动态变化竞争窗口的水下无线传感器网络MAC协议  

Underwater Wireless Sensor Network MAC Protocol Based on Dynamical Change Contention Window

作　　者：石岳 李成 郝琨 SHI Yue;LI Cheng;HAO Kun(School of Computer and Information Engineering,Tianjin Chengjian University,Tianjin 300384,China)

机构地区：[1]天津城建大学计算机与信息工程学院,天津300384

出　　处：《水下无人系统学报》2020年第2期174-181,共8页Journal of Unmanned Undersea Systems

基　　金：国家自然科学基金(61902273);天津市自然科学基金面上项目(18JCYBJC85600);青海省物联网重点实验室开放课题(2017-ZJ-Y21).

摘　　要：为了满足自主水下航行器(AUV)与静态水底节点的高效通信,文中设计了一种动态变化竞争窗口介质访问控制(DCCW-MAC)协议。该协议根据传感器节点与AUV的距离优化竞争窗口值,传输成功率高的节点调整退避时间优先发送数据包,可高效利用信道资源。仿真结果表明,所提出的DCCW-MAC协议能够满足AUV和节点之间的通信。与传统的CW-MAC协议相比,在节点数和泊松到达率相同的条件下,其最大吞吐量提高了5%,端到端时延降低了15%。A dynamical change contention window-media access control(DCCW-MAC) protocol is designed to improve the efficiency of communication between autonomous undersea vehicle(AUV) and sensor nodes. The protocol optimizes the contention window value according to the distance between sensor nodes and AUV, and the sending node with high transmission success rate adjusts the back-off time to transmit data package first, which can efficiently utilize channel resources. Simulation results show that DCCW-MAC protocol is applicable to the communication between AUV and nodes, and compared with the traditional CW-MAC protocol under the same number of nodes and Poisson arrival rate, its maximum throughput increases by 5% and the end-to-end delay is reduced by 15%.

关 键 词：自主水下航行器 水下无线传感器网络 介质访问控制协议 竞争窗口 网络吞吐量 

分 类 号：TJ630.34[兵器科学与技术—武器系统与运用工程] TP393[自动化与计算机技术—计算机应用技术]