CAREER: Efficient Resource Allocation and Control in Mobile Wireless Networks with Multimedia Services

因特网的爆炸式增长和所有无线服务的持续急剧增长正在推动对增加的容量、数据速率、所支持的多媒体服务以及对不同服务类别的不同服务质量（QoS）要求的支持的需求。宽带CDMA（WCDMA）已经被提议作为第三代（3G）无线系统的关键空中接口技术，并且将继续被采用作为将向多媒体业务提供区分服务的4G系统的强有力的候选。由于WCDMA系统具有动态改变用户信道速率的能力，因此可以在带宽分配方面提供更大的灵活性。虽然即将到来的新无线电技术将在空中接口处带来更多带宽，但如果管理不当，带宽资源将不能满足未来用户的需求，为了解决提供高效和有效的无线多媒体服务，满足用户的QoS的整体问题（服务质量）针对移动的无线网络中的各种需求，我们计划从两个不同的层面研究所涉及的各种问题，从而提供一个集成的解决方案以及与所考虑的网络相关联的两个主要元素对齐的角度：无线特性和移动性。具体地，给定严格的多媒体用户需求，为了满足设计有效的无线资源分配方法的该提议的主要目标，我们首先去除无限数量的用户和固定分组长度的传统假设，并且在具有有限数量的语音和数据用户的更一般和现实的情况下分析无线系统性能，有限的缓冲区和可变的数据包长度。考虑到环境的无线性质和信道容量的变化，一个有效的数据速率调度方案，适应不断变化的信道条件进行了研究，以最大限度地提高加权系统吞吐量。为了保证竞争用户之间的资源公平分配，尽管信道容量的变化，自适应补偿技术也被采用。此外，为了解决移动的无线网络中的移动性和拥塞问题及其对用户QoS的影响，我们通过引入和研究以下附加维度来研究接纳控制和切换过程的增强：灵活的高级带宽预留和重新配置，以优化带宽利用率，特别是在支持灵活QoS的服务时;提出了一个基于移动的代理系统的设计方案，该系统提供了一个灵活而全面的框架来实现这些管理过程和方案。引进新课程;研究生咨询和指导;本科生项目监督;参与外联方案;在当地技术高中讲课;最后，加强现有的实验室基础设施和设施。教育计划的目标之一是创造一个有吸引力的研究和教育环境，使研究生和本科生都可以合作，共同学习和发现。此外，NJIT有大量的少数民族学生和女学生（分别约占40%和18%），预计其中一些学生将有机会为该项目做出贡献。最后，我希望拟议的计划将使我能够继续扩大我的职业发展已经建立的国际层面。

The explosive growth of the Internet and the continued dramatic increase for all wireless services are fueling the demand for increased capacity, data rates, supported multimedia services, and support for different Quality of Service (QoS) requirements for different classes of services. Wideband CDMA (WCDMA) has been proposed as a key air interface technique for third generation (3G) wireless systems, and will continue to be adopted as a strong candidate for 4G systems that will provide differentiated services to multimedia traffic. With the capability of dynamically varying user channel rates, WCDMA systems can provide more flexibility in bandwidth allocation. Although the out-coming new radio technology will bring more bandwidth at air interface, if not managed properly, the bandwidth resources will not meet the requirements of future users.In order to address the overall problem of offering efficient and effective wireless multimedia services that meet the users' QoS (Quality of Service) requirements in mobile wireless networks we plan to provide an integrated solution by investigating the various involved problems from two different levels and angles which are aligned with the two main elements associated with the networks under consideration: wireless nature and mobility. Specifically, given the strict multimedia user requirements, in order to satisfy the main objective of this proposal of designing efficient wireless resource allocation methods we first remove the traditional assumptions of infinite number of users and fixed packet lengths, and analyze the wireless system performance under a more general and realistic case with finite population of voice and data users, finite buffers and variable packet length for data users. Given the wireless nature of the environment under consideration and the variations in the channel capacity, an efficient data rate scheduling scheme that adapts to the changing channel condition is investigated in order to maximize the weighted system throughput. An adaptive compensation technique is also employed in order to guarantee the fair allocation of resources among the competing users despite of the variation of channel capacity. Furthermore in order to deal with the issue of mobility and congestion in mobile wireless networks and their impact on the users' QoS, we study the enhancement of admission control and handoff process by introducing and investigating the following additional dimensions: flexible advanced bandwidth reservation and reconfiguration to optimize the bandwidth utilization especially when services with flexible QoS are supported; integration of pricing and admission control to maximize the users' total utility and alleviate or minimize the network congestion; design of a mobile agent based system to provide a flexible and comprehensive framework to implement these management processes and schemes.The proposed educational plan includes: undergraduate and graduate teaching; introduction of new courses; graduate student advising and mentoring; undergraduate project supervision; participation in an outreach program; lectures at local technical high schools; and finally, enhancement of existing laboratory infrastructure and facilities. Among the objectives of the education plan is to create an attractive research and educational environment in which both graduate and undergraduate students alike can collaborate and work together in order to learn and discover. Furthermore NJIT has a significant presence of minority and women students (~40% and ~18% respectively) and it is expected that some of these students will have the opportunity to contribute to this project. Finally I expect that the proposed plan will allow me to continue to expand on the already established international dimension of my career-development.