无线/移动因特网的QoS保证技术的研究

In mobile access wireless network with lack resources, unreliable channel and.users’ terminals frequent mobility, we do a great research in data link layer,.network layer and transmission layer in our project to guarantee end to end.transmission with QoS. We set up the QoS routing simulation platform in cellular.mobile network and ad-hoc network, in which a new wireless/mobile network topology.generation algorithm is presented. Some QoS routing schemes of imprecise information.are illustrated according to the characteristics of network imprecise state. A.certain QoS routing algorithms are proposed separately for solving the problems of.delay-constrained and minimum cost routing, bandwidth- constrained and minimum cost.routing as well as delay-bandwidth- constrained and minimum cost routing. We also.study the routing optimization method that is fast and effective in the QoS-sensitive.cellular network. In order to solve the problem of QoS unicast path and multicast.routing tree, we utilize the advanced optimization methods and global.imprecise-state-based routing technology. We analyze the performance of current.wireless/mobile routing algorithms, present some QoS routing algorithms with the.combination of using local precise state routing technology and global imprecise.state routing technology as well as heuristic searching methods to support.国家自然科学基金资助项目结题报告.3.wireless/mobile network, then get the experimental analysis. We also analyze and.draw a conclusion which factors influence the TCP performance in wireless network..TCP-FSR and TCP-RC technology have been presented to improve TCP performance in.Ad-hoc network. Moreover, we study a new schedule policy and admission control.algorithm to realize seamless connection in mobile Internet.

针对无线网移动接入中资源缺乏、信道不可靠及用户终端频繁移动的特点，为保证端到端QOS传输，首先建立移动蜂窝网和自组网的QOS路由算法和协议模型，结合区分服务和集成服务的特点乾地扩充；提出新的调度策略和准入控制算法；根据新的缓冲区管理机制，建立无线网QOS接入实验床。它是实现移动IP无缝连接、进行多媒体通信的关键技术。