一种用于格型拓扑的水声传感器网络TDMA协议  

A TDMA Protocol for Underwater Acoustic Sensor Networks with Grid Topology

作　　者：钟永信[1] 黄建国[1] 韩晶[1] 

机构地区：[1]西北工业大学航海学院,西安710072

出　　处：《电子与信息学报》2010年第7期1774-1778,共5页Journal of Electronics & Information Technology

基　　金：国家自然科学基金(60572098);教育部博士点基金(20070699020)资助课题

摘　　要：由于海洋信道恶劣的传输条件,使设计可靠且有效的水声传感器网络MAC协议面临极大的挑战。该文针对六角格型网络的结构特点提出了G-TDMA协议,该协议通过对时隙的空间复用,提高了信道资源的利用率;并且在数据帧的发送过程中完成网络节点间的同步,从而降低同步开销;同时根据水声信道的高传输延时和起伏特性,加入了保护时间以避免数据冲突。仿真结果表明,在水声信道条件下该协议可有效地改善网络性能。Challenges of designing reliable and efficient Medium Access Control（MAC） protocols are posed for underwater acoustic sensor networks,because of hostile seawater channel condition.For hexagonal grid topology networks,this paper presents G-TDMA protocol,which improves channel utility with spatial reuse of time slots and reduces synchronic overhead by synchronizing nodes in the process of packet transmissions.In addition,G-TDMA employs guard time to avoid packet collisions due to long propagation delay and channel fluctuations.Simulation tests show that the protocol improves network performances in underwater environment.

关 键 词：水声传感器网络 格型拓扑 MAC协议 时分复用 

分 类 号：TP393[自动化与计算机技术—计算机应用技术]