QoS routing and medium access control in ultra-wideband wireless communications networks

超宽带无线通信网络中的 QoS 路由和媒体访问控制

• 批准号: 203560-2006
• 负责人: Shen, XueminSherman
• 金额: $ 3.95万
• 依托单位: University of Waterloo
• 依托单位国家: 加拿大
• 项目类别: Discovery Grants Program - Individual
• 财政年份: 2006
• 资助国家: 加拿大
• 起止时间: 2006-01-01 至 2007-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=338901
• 关键词: QoS; routing; medium; access; control

Ultra-wideband (UWB) is an emerging wireless communication technology with unique potential merits such as high rate, low transmission power, immunity to multipath propagation, and capability in precise positioning. It has been considered as one of the most promising candidates for short range indoor and indoor-to-outdoor wireless communications. It is expected that UWB wireless networks should be capable in supporting multimedia traffic which presents coexistence of diverse services. However, the diversity of services results in the need for provisioning heterogeneous quality of service (QoS) in the networks. This is a very challenging task because of the limited transmission power, user mobility, hostile channel conditions, short range and high rate transmission, interference from other co-existent systems, and stringent constraints on computational complexity and system overhead. As a relatively new technology for commercial applications, significant R&D efforts have been devoted to UWB wireless technologies, most of which focus on UWB transmission issues at the physical layer. More recently, there is increasing attention to the design of protocols and algorithms at the UWB network higher layers since efficient and effective routing and medium access control (MAC) mechanisms are essential to QoS satisfaction and high network resource utilization. One of the promising approaches is the cross-layer design which considers the UWB transmission characteristics. The proposed research will focus on 1) development of an efficient MAC protocol in the avenue of multiple access, overhead reduction, packet scheduling, and QoS provisioning; 2) development of a routing scheme for UWB mobile ad hoc networks, which should ensure QoS satisfaction and adapt to user mobility and traffic load variations, taking advantage of the positioning capability of UWB; 3) investigation of the vertical coupling between the protocol stacks, so that the resource allocation algorithms at the link and network layers can adapt to dynamics of the wireless channels and characteristics of UWB transmission and user applications to achieve a better tradeoff between QoS support and high resource utilization.

超宽带（UWB）是一种新兴的无线通信技术，具有独特的潜在优点，例如高率，低传输功率，对多径传播的免疫力以及精确定位的能力。它被认为是室内和室内室外无线通信的最有前途的候选人之一。预计UWB无线网络应该能够支持提供多种服务共存的多媒体流量。但是，服务的多样性导致需要在网络中提供异质服务质量（QoS）。这是一项非常具有挑战性的任务，因为传输功率有限，用户移动性，敌对通道条件，短距离和高速传输，其他共存系统的干扰以及对计算复杂性和系统开销的严格约束。作为用于商业应用的相对较新的技术，大量的研发工作已专门用于UWB无线技术，其中大多数专注于物理层的UWB传输问题。最近，由于高效有效的路由和中等访问控制（MAC）机制对于QoS满意度和高网络资源利用至关重要，因此，UWB网络上较高层的协议和算法的设计越来越关注。有前途的方法之一是跨层设计，它考虑了UWB传输特性。拟议的研究将集中于1）在多次访问，额外降低，数据包计划和QoS供应大道中开发有效的MAC协议； 2）开发UWB移动临时网络的路由方案，该方案应确保QoS满意度并适应用户移动性和交通负载变化，并利用UWB的定位能力； 3）调查协议堆栈之间的垂直耦合，以便链接和网络层的资源分配算法可以适应UWB传输和用户应用程序的无线渠道的动态以及在QoS支持和高度支持之间的更好的折衷资源利用。