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

下一代移动自组织网络发展的一个关键挑战是使移动用户能够以适当的服务质量（QOS）访问、操作和分发语音、视频、数据和图像。移动自组织网络本质上是多跳的，带宽有限，目前的设计只支持尽最大努力的语音和数据通信。构成无线网络基础设施的节点可以随意移动，并以任意的方式组织自己。因此，网络的无线系统在一段时间内可能是相对静止的，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，也可以通过网关路由器与内部网或全球互联网互联。为移动自组织网络提供高质量的服务支持是本提案的主题。迫切需要提出、调查和评估移动自组织网络的服务支持质量，并研究它们与全球互联网的互连。该方法将调查假定通过宽带蜂窝网络与全球互联网互联的移动自组织网络的服务质量。该提案的主要目标之一是确定在这种环境中可以给予移动主机和路由器的服务质量保证水平。服务质量支持需要对两个通信移动主机之间路径上可用资源的变化以及由于主机和路由器移动而导致的网络拓扑变化具有高度的适应性和响应性。研究人员提出了一个研究议程，包括以下项目阶段。首先，研究并定义一个全面的QOS架构和相关算法，用于在可通过宽带蜂窝接入点与全球互联网互连的移动自组织网络中维护自适应实时服务。其次，研究、定义、模拟和部署基于带内信令和能够在移动自组织网络中建立、维护和终止自适应实时流的移动软状态管理概念的无线流管理。第三，研究、定义和分析新的准入控制算法，该算法基于支持最小带宽保证的公用事业公平分配的概念，将带宽分配给自适应实时流。接下来，调查、设计和分析合适的无线分组调度机制，该机制可以支持分组级服务质量，同时响应自组织无线网络中经历的位置相关信道条件。最后，将我们现有的宽带蜂窝测试平台扩展到自组织域，并在实验环境中演示无线流管理，接纳控制和无线分组调度的概念验证。在整个项目过程中，我们将使用分析，模拟和实验技术的组合来验证这些算法。

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.