WIRELESS TECHNOLOGY: Supporting Quality of Service in Mobile Ad Hoc Networks

下一代移动的adhoc网络的一个关键挑战是使移动的用户能够以适当的服务质量（QOS）访问、处理和分发语音、视频、数据和图像。移动的adhoc网络本质上是多跳的，带宽有限，目前只支持尽力而为的语音和数据通信。 构成无线网络基础设施的节点可以自由地随机移动，并以任意方式组织自己。 因此，网络的无线拓扑可能在一段时间内相对静止，或者更有可能以不可预测的方式快速变化。 这样的网络可以以独立的方式运行，或者可以通过网关路由器与内联网或全球互联网互连。 为移动的ad hoc网络提供服务质量支持是本提案的主题，迫切需要提出、调查和评估移动的ad hoc网络中的服务质量支持，并研究它们与全球互联网的互连。 该方法将是调查服务质量的移动的ad hoc网络假设是通过宽带蜂窝网络互连到全球互联网。 本提案的主要目标之一是确定在这样的环境中可以给予移动的主机和路由器的服务质量保证的水平。 服务质量支持需要高度适应和响应的可用资源的变化沿着两个通信移动的hosts.The研究人员之间的路径和网络拓扑结构的变化，由于主机和路由器的移动性提出了一个研究议程，包括以下项目阶段。 首先，研究和定义一个全面的QOS体系结构和相关的算法，以保持自适应实时服务的移动的ad hoc网络，可以互连到全球互联网通过宽带蜂窝接入点。 其次，研究、定义、模拟和部署基于带内信令和移动的软状态管理概念的无线流量管理，能够在移动的ah hoc网络中建立、维护和终止自适应实时流量。 第三，研究，定义和分析新的准入控制算法，分配带宽的自适应实时流的基础上的效用公平分配的概念，支持最小带宽保证。 接下来，调查，设计和分析合适的无线数据包调度机制，可以支持数据包级的服务质量，同时响应于位置相关的信道条件，在ad hoc无线网络中经历的。 最后，扩展我们现有的宽带蜂窝测试平台的ad hoc域和演示的概念验证的无线流量管理，准入控制和无线数据包调度的实验设置。 在整个项目过程中，我们将使用分析，模拟和实验技术相结合来验证这些算法。

A key challenge to the development of next-generation mobile ad hoc networks is to enable mobile usersto access, manipulate and distribute voice, video, data and images with suitable quality of service (QOS).Mobile ad hoc networks are multi-hop in nature, bandwidth limited and are currently designed to supportonly best effort voice and data communications. Nodes that constitute the wireless network infrastructureare free to move randomly and organize themselves in arbitrary fashions. Thus, the network's wirelesstopology may be relatively static over periods of time or, more likely, change rapidly in unpredictableways. Such a network may operate in a standalone fashion, or may be interconnected to intranets or theglobal Internet via gateway routers. Providing quality of service support to mobile ad hoc networks is thesubject of this proposal.There is a critical need to propose, investigate and evaluate quality of service support in mobile ad hoc networks and to study their interconnection to the global Internet. The approach will be to investigate quality of service in mobile ad hoc networks assumed to be interconnected to the global Internet through broadband cellular networks. One of the primary objectives of this proposal is to determine the level of quality of service assurances that can be given to mobile hosts and routers in such an environment. Quality of service support needs to be highly adaptive and responsive to changes in the available resources along the path between two communicating mobile hosts and to network topology changes due to host and router mobility.The researcher propose a research agenda that comprises the following project phases. First, study and define a comprehensive QOS architecture and associated algorithms for maintaining adaptive real-time services in mobile ad hoc networks that can be interconnected to the global Internet through broadband cellular access points. Second, investigate, define, simulate and deploy wireless flow management based on in-band signaling and the notion of mobile soft-state management capable of establishing, maintaining and terminating adaptive real-time flows in mobile ah hoc networks. Third, study, define and analyze new admission control algorithms that allocate bandwidth to adaptive real-time flows based on the notion of utility-fair allocation that supports minimum bandwidth assurances. Next, investigate, design and analyze suitable wireless packet scheduling mechanisms that can support the packet level quality of service while responding to location dependent channel conditions experienced in ad hoc wireless networks. Finally, extend our existing broadband cellular testbed to the ad hoc domain and demonstrate proof-of-concept of wireless flow management, admission control and wireless packet scheduling in an experimental setting. Throughout the course of the project we will validate these algorithms using a combination of analytical, simulation and experimental techniques.