UWB Ad Hoc网络无线接入特性与定位辅助路由分析  

Analysis of Wireless Medium Access and Location Aided Routing for Ultra Wideband Ad hoc Network

作　　者：刘珩[1] 安建平[1] 

机构地区：[1]北京理工大学信息科学技术学院电子工程系,北京100081

出　　处：《南京邮电大学学报（自然科学版）》2006年第2期63-66,96,共5页Journal of Nanjing University of Posts and Telecommunications：Natural Science Edition

基　　金：北京市自然科学基金(4052024)资助项目

摘　　要：考察基于UWB技术的Ad Hoc网络组网的关键问题。根据UWB信号特征分析了信道容量,说明在大带宽、有限功率的通信模型下UWB Ad Hoc网络的节点吞吐量。从网内冲突和网间干扰方面讨论无线接入面临的问题和解决途径,包括解决网内冲突的主从轮询机制、CSMA竞争机制和应对于网间干扰的扩频技术。举例分析了UWB Ad Hoc网络MAC协议的特性,说明将Ad hoc MAC与动态信道编码结合,并采用跳时的方式解决网间干扰的是一种有效的方法。在分析UWB和GPS定位信息不同点的基础上进一步研究了基于TOA的定位算法和定位辅助路由LAR协议的原理,提出两者结合的UWB Ad Hoc网络定位辅助路由。UWB Ad Hoe network was concerned in this research. Channel capacity was analyzed according to UWB signal characters. Node throughput was explained under the wideband and finite power model in UWB Ad Hoc network. Problems of wireless access were classified into intra network interference and inter network interference. polling scheme and CSMA were used to solve the intra network interference, and SS （spread spectrum） was proposed to solve the inter network interference. Some MAC protocols used in UWB Ad Hoc network were compared. An idea of combining dynamic channel coding with MAC protocol and using time-hopping was analyzed. At last a routing policy combining the locating algorithms based on TOA and LAR protocol was introduced.

关 键 词：超宽带 移动自组网 MAC 定位辅助路由 

分 类 号：TN915[电子电信—通信与信息系统]