一种单信道无线传感器网络的隐藏终端和暴露终端问题解决方案  

A solution of hidden-terminal and exposed-terminal problem for single channel WSN network

作　　者：王晖[1] 

机构地区：[1]沈阳大学信息工程学院,辽宁沈阳110044

出　　处：《电子技术应用》2008年第9期87-90,95,共5页Application of Electronic Technique

基　　金：辽宁省自然科学基金(20042001);沈阳市科技计划(1071205-1-00)基金的资助

摘　　要：结合 GPS 技术提供的定位特点,采用跨层设计思想,提出了一种单信道多跳 WSN 网络的媒体访问控制协议。在协议的控制帧中携带路由信息和状态信息,根据这些信息,判断存在的暴露终端和隐藏终端,同时利用上游节点的 ACK 应答作为与下游节点的 RTS 握手,建立 CTS/DATA/ACK的三次交互机制。仿真表明,与已有的 IEEE802.11和 MACA-BI 等同类协议相比,该协议可有效解决隐藏终端和暴露终端问题,提高网络的吞吐量和端到端的延时,并降低网络的握手开销和控制帧的冲突概率。Combined with the good positioning of GPS, a new and reliable MAC protocol for the single-channel multi-hop WSN network is proposed based on cross layer design. The control frame tagged with the routing and state information ean be sensed by the neighboring nodes. The ACK message sent by the upstream node is the RTS handshake with the downstream node, and the CTS/DATA/ACK exchange is set up. Simulation results show that proposed protocol outperforms IEEE802.11 and MACABI and can solve the hidden-terminal and exposed-terminal problem, improve the network of throughput and delay, reduce the overhead of handshake and the probability of the control message collision.

关 键 词：无线传感器网络 隐藏终端 暴露终端 全球定位系统 

分 类 号：TN92[电子电信—通信与信息系统] TP212[电子电信—信息与通信工程]