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, Xuemin(Sherman)
• 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: 2007
• 资助国家: 加拿大
• 起止时间: 2007-01-01 至 2008-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=366350
• 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，具有高速率、低传输功率、抗多径传播、精确定位等独特的潜在优点。它被认为是短距离室内和室内到室外无线通信最有前途的候选者之一。预计 UWB 无线网络应能够支持多媒体流量，从而实现多种服务的共存。然而，服务的多样性导致需要在网络中提供异构服务质量（QoS）。这是一项非常具有挑战性的任务，因为有限的传输功率、用户移动性、恶劣的信道条件、短距离和高速率传输、来自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限制。作为一项相对较新的商业应用技术，UWB无线技术的研发工作投入了大量的精力，其中大部分集中在物理层的UWB传输问题。最近，人们越来越关注 UWB 网络高层的协议和算法设计，因为高效且有效的路由和介质访问控制 (MAC) 机制对于 QoS 满足和高网络资源利用率至关重要。其中一种有前途的方法是考虑 UWB 传输特性的跨层设计。拟议的研究将集中于 1) 在多址接入、减少开销、数据包调度和 QoS 供应方面开发高效的 MAC 协议； 2）开发UWB移动自组织网络的路由方案，该方案应确保QoS满足并适应用户移动性和业务负载变化，利用UWB的定位能力； 3）研究协议栈之间的垂直耦合，使得链路层和网络层的资源分配算法能够适应无线信道的动态以及UWB传输和用户应用的特性，从而在QoS支持和高带宽之间实现更好的权衡。资源利用。