多跳移动AdHoc无线网络中UPMA协议的仿真.doc

多跳移动AdHoc无线网络中UPMA协议的仿真.doc第23卷第I期 计算机仿真 2006年1月
文章编 小 1006 -9348（ 2006）01 -0137 - 07
多跳移动Ad Hoc无线网络屮UPMA协议的仿真
李汉涛，刘凯，张军
＜北京轨空航人人学新航行系统民航車戍实验室，北京100083）
摘耍：基于•有效竞争预约接入、无冲突轮询传输的思想•该文改进了支持节点移动性和多跳网络结构的依据用户妥善安排的 多址接入（UPMA）协议，然后利用网络仿真匸具OPNET构建T UPMA协议的仿真框架，并仿宾了由自组织分群算法所获得 酢的恋内无线传输惜况。该仿貞框架为UPMA协议i卞细配蜀了物理上和数据链路Q模型，町以设直不同的信道特性以及应 ，该文分析了 UPMA协议的信道吞吐量、平均消息时延和平均消息丢弃率，并将英号带冲突避免的我波 侦听多址接入协议（CSMA/CA）,•结果表明,LPMA协议町以提供较高的乔吐磧、较低的平 均消息时延和较小的平均消息丢弃率。
关键诃：多跳移动无线网络：多址接入协议:轮询
中图分类号:TP393 文献标识码：B
Simulation of UPMA Protocol for Wireless Multihop
Mobile Ad Hoc Networks
LI Han - tao, LIU Kai, ZHANG Jun
(CNS/ATM Labs of CAAC, Beihang University* Beijing 100083>China)
ABSTRACT: Based on the concept of contention resen at ion and polling transmission« an improved User - dependent perfect - scheduling multiple access ( UPMA) protocol for supporting node mobility and niultihop architecture in wire ・ less niultihop mobile ad hoc network is described. By using OPNET> the simulation framework of UPMA protocol is developed to simulate wireless transmission in a cluster of wireless niultihop mobile ad hoc networks> which is tained by self - organizing algorithms・ With the detailed model setup for physical layer and data link layers this framework can simulate the perlbnnance of UPMA protocol > such as channel throughput * average message delay» average message dropping nite by configuring various chan