【作者】 陈建虎；

【导师】 李红艳；

【作者基本信息】 西安电子科技大学 ， 控制理论与控制工程， 2006， 硕士

【摘要】 无线移动自组织(Ad Hoc)网络是以分组无线网技术为基础互联的无线电台、计算机硬件和软件的集合,由于可以快速灵活的配置稳定有效的动态网络而广泛应用于军事战争、警察与医疗部门的抢险救灾、传感器网络、课堂教育等众多领域,其战略意义非常重要。本文深入研究Ad Hoc网络容量的受限因素和提高策略。首先介绍Kumar公式和容量域两个概念,并研究节点移动性、多跳路由技术、变速率数据发送、功率控制、方向天线、多信道等技术对网络容量的影响,阐明多信道技术是提高网络容量最具发展潜力的工具。接着深入分析多信道的物理技术、多信道附带问题、多址接入机制、信道分配以及多信道多网卡系统的网卡分配策略。最后提出一种基于跨层设计的多信道自组织网络多址接入协议(MMAP)。仿真结果显示,MMAP协议能够显著提高网络容量。更多还原

【Abstract】 Wireless Ad Hoc network bases on technology of packet wireless network and is the aggregate of radios, hardware and software for computer. Configed quickly and flexibly to a stable and effective dynamic network, Ad Hoc network is widely used in war, police and hospital for emergency, sensor network, and classroom education.It’s very important for developping Ad Hoc network.This paper researches on the restricted factors and the improving policy of Ad Hoc network capacity.At first, the paper introduces the two concept that Kumar formula and capacity region, and analyze that node shift, multi-hop route technology, transmitting in vary rates, power control, directed antenna, and multi-channel how to affect network capacity.It is proved that multi-channel technology is the most powerful tool to improve network capacity. Then the physic technology of multi-channel, some problems aroused by multi-channel, multi-access mechanism, multi-channel assignment, and transceivers assignment policy of multi-channel multi-transceiver system are further analysed.In the end, a multi-channel Ad Hoc network medium access protocol based on cross-layer design (MMAP) is proposed. It is learned from the simulation that MMAP protocol can do well in improving network capacity.更多还原