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Simulation System for Performance Evaluation of Autonomous Distributed Wireless Ad Hoc Information Networks

自主分布式无线自组织信息网络性能评估仿真系统

基本信息

批准号：
12555110
负责人：
YOSHIDA Susumu
金额：
$ 8万
依托单位：
KYOTO UNIVERSITY
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (B)
财政年份：
2000
资助国家：
日本
起止时间：
2000 至 2002
项目状态：
已结题

项目摘要

With a recent trend to embed huge number of wireless transceiver chips to every device and equipment in daily life, study of an autonomous distributed wireless ad hoc networking is getting more and more important. A flexible simulation system for the performance evaluation of such autonomous wireless networks has been implemented to study fundamental problems indispensable for its design, such as spectrally efficient relaying scheme, routing issue and location management. Major research results obtained through the project are summarized below.1. Spectral efficiency and terminal power consumption of ad hoc networks were studied and compared with those of cellular system. We found that an optimum hop distance exists assuring the maximum number of simultaneous routes, and power consumption is comparable to the cellular system.Routing scheme is modified so that it is applicable to the non-uniform terminal distribution case.2. A hierarchical routing protocol for ad hoc networks has been proposed and its performance has been evaluated by computer simulations. It is based on CBRP (Cluster Based Routing Protocol) and finds more robust routes by utilizing location and velocity information.3. A destination discovery scheme has been proposed assuming a city-wide wireless multi-hop network and its performance has been evaluated by computer simulations. A mobile station tries to find its destination using the location information, which is collected and kept by sparsely scattered simple fixed stations.4. An experimental multi-hop network consisting of notebook PC's is implemented using IEEE802. 11b wireless LAN cards and its throughput is evaluated. By reducing the transmitter power and introducing multi-hop connection, total throughput is found to increase owing to the spatial frequency reuse.

随着近来将大量无线收发器芯片嵌入到日常生活中的每个装置和设备中的趋势，对自主分布式无线自组织网络的研究变得越来越重要。已经实现了用于评估此类自主无线网络性能的灵活仿真系统，以研究其设计中必不可少的基本问题，例如频谱效率中继方案、路由问题和位置管理。本课题取得的主要研究成果如下： 1．研究了自组织网络的频谱效率和终端功耗，并与蜂窝系统进行了比较。我们发现存在一个最佳跳距，保证最大数量的同时路由，并且功耗与蜂窝系统相当。修改路由方案，使其适用于终端分布不均匀的情况。 2．提出了一种用于自组织网络的分层路由协议，并通过计算机模拟评估了其性能。它基于CBRP（基于集群的路由协议），利用位置和速度信息找到更稳健的路由。 3．假设全市无线多跳网络提出了目的地发现方案，并通过计算机模拟评估了其性能。移动站试图利用位置信息来寻找其目的地，该信息是由稀疏分散的简单固定站收集和保存的。4．使用 IEEE802 实现了由笔记本电脑组成的实验性多跳网络。 11b 无线 LAN 卡及其吞吐量进行了评估。通过降低发射机功率并引入多跳连接，由于空间频率复用，总吞吐量有所增加。