CAREER: Achievable QoS and Scheduling Policies for Integrated Services Wireless Networks

在综合业务无线网络中，地理上分布的异构应用必须共享一个公共的无线信道。 为了协调传输资源的共享，采用了多址接入技术。 需要诸如时分多址（TDMA）或码分多址（CDMA）的协议。在综合业务网中，为了控制QoS，通常需要呼叫接纳和资源管理 在呼叫准入时，必须首先确定是否存在时隙分配（如在TDMA的情况下）或功率管理（如在CDMA的情况下）策略，其可以向网络中的每个应用传递目标QoS。 为了回答这个问题，需要确定可实现的QoS（在任何可接受的策略下可以提供的性能向量集）的区域。 可实现QoS的区域将取决于底层信道条件和多址技术。 每种接入技术在对抗无线信道的影响方面以及在提供不同QoS要求的同时其适应可变速率服务的容易性方面具有其固有的优点和缺点。 可实现的QoS的区域的确定导致呼叫准入和调度functions.The PI的发展一直在进行研究，在该地区的综合服务在无线网络在过去的五年里，现在建议翻译成可行的technologyandeducational tools通过开发一个综合服务无线网络（ISWN）的测试平台，他和其他人以前的研究。 ISWN项目是多方面的，因为它包含教育、发展和研究组成部分。 该计划将分三个阶段进行：系统设计及规格说明、发展支援多媒体通讯的新方法，以及在运作系统中安装软件。

In integrated services wireless networks, geographically distributed heterogeneous applications must share a common wireless channel. To coordinate the sharing of the transmission resources, a multiple access protocol such as time-division multiple access (TDMA) or code-division multiple access (CDMA) is required. To control QoS in an integrated services network, usually both call admission and resource management (scheduling at the packet level) among the admitted calls are needed.At call admission, it must first be determined if there exists a slot allocation (as in the case of TDMA) or power management (as in case of CDMA) policy that can deliver a target QoS to each application in thenetwork. To answer this question, the region of achievable QoS (set of performance vectors that can be delivered under any admissible policy) needs to be identified. The region of achievable QoS will depend on the underlying channel conditions and the multiple access technology. Each access technology has its inherent advantages and disadvantages in combating the effects of the wireless channel and in its ease of accommodating variable rate service while delivering diverse QoS requirements. The determination of the region of achievable QoS leads to the development of call admission and scheduling functions.The PI has been conducting research in the area of integrated services over wireless networks for the past five years and now proposes to translate some of his and others prior research into viable technologyand educational tools through the development of an integrated services wireless network (ISWN) test-bed. The ISWN project is multifaceted in the sense that it contains educational, development, and research components. The project will be implemented in three phases: system design and specification, development of novel approaches to support multi-media traffic and software implementation in an operational system.