Adaptive Power Control & Link Quality Maintenance in Wireless Communication Networks

无线网络正迅速成为现代通信市场的主要组成部分，并且在对个人通信系统服务的需求的驱动下，在业务量方面与有线网络的竞争日益激烈。 无线网络为用户提供的无处不在的无限制接入，加上有线网络的高带宽，为现代全球通信需求提供了全面的解决方案。 与受保护的有线环境相反，无线信道可能非常不稳定，本质上是随机的;干扰是一个必须科普的无所不在的事实。 从历史上看，网络科学是基于有线网络范式发展起来的，其中路由、准入控制、分组电路交换、拥塞管理等概念首次出现。 然而，无线网络的出现为网络问题引入了一个全新的维度，本项目正在探索这一问题。 现代应用（多媒体）正在迅速推动无线通信，使以前仅限于有线世界的高级网络功能（主动拥塞控制、保证服务质量等）需要随时可用;然而，它们必须由高度不稳定的无线电信道和节点移动性下支持，使得零星的连接和不可预测的传播事件（遮蔽、衰落等）规则，而不是例外。 这种二分法引入了一些有趣的研究问题，本项目探讨。它们主要集中在控制网络节点的发射功率，以在存在干扰、节点移动性和严重信道损害的情况下维持网络链路的服务质量。这种控制导致电池供电的（移动的）节点的寿命延长、更高的网络容量以及更稳定和有效的系统操作，所有这些都具有很高的实际重要性。 - 有关该项目的详细信息将出现在网站上：http://www.netlab.stanford.edu/wirelss_nsf.html

Wireless networking is rapidly becoming a major component of the modern communications market and increasingly competes with wired networking, in terms of business volume, driven by the demand for personal communication systems & services. The ubiquitous untethered access that wireless networks provide to users, coupled with the high bandwidth of wired networks, offers a comprehensive solution to modern global communication requirements. Contrary to the protected environment of the wire, the wireless channel can be highly erratic and essentially stochastic; interference is an omni-present fact one has to cope with. Historically, networking science has evolved based on the wired network paradigm, where concepts like routing, admission control, packet & circuit switching, congestion management etc. first emerged. However, the advent of wireless networks introduces a whole new dimension to the networking problem, which this project is exploring. Modern applications (multimedia) are rapidly driving wireless communication to the point where advanced networking capabilities, previously limited to the wired world (active congestion control, guaranteed quality of service etc.) need to be readily available; yet, they have to be supported by the highly erratic radio channel and under node mobility, making sporadic connectivity and unpredictable propagation events (shadowing, fading etc.) the rule rather than the exception. This dichotomy introduces a number of interesting research issues which this project explores. They are mainly centered around the control of transmitter power of network nodes for the quality of qervice maintenance of network links in the presence of interference, node mobility and severe channel impairements. Such control results in prolonged lifetime of battery powered (mobile) nodes, higher network capacities, and more stable and efficient system operations, all of which are of high practical importance. -------------------- Details abo ut the project will be appearing on the web site: http://www.netlab.stanford.edu/wirelss_nsf.html