基于协作机制的无线多媒体网络效用提升方法研究

项目名称： 基于协作机制的无线多媒体网络效用提升方法研究

项目编号： No.61202470

项目类型： 青年科学基金项目

立项/批准年度： 2013

项目学科： 计算机科学学科

项目作者： 陈怡

作者单位： 华中师范大学

项目金额： 25万元

中文摘要： 面对海量泛在的无线通信需求和多媒体传输效率瓶颈，实现高速高质量的多媒体业务服务面临严峻挑战。在不增加现有网络硬件，为获得更高的网络容量和更好的上层多媒体传输性能，本研究提出基于协作分集的多媒体传输网络效用提升方法。1）引入表征用户感知特性的离散效用函数，结合无线协作带来的网络增益，建立基于用户感知差异化和协作分集的多播无线资源优化模型，提升多播用户感知质量和无线网络的高效性；2）从多媒体数据流之间存在依赖关系的特性出发，建立面向任务和协作分集的网络效用资源优化模型，提升新型复杂多媒体任务的质量。研究成果预期可在相同实验条件下使网络效用提高10%，提升无线多媒体传输用户服务质量，优化资源分配，提高资源效率利用；本研究可补充和扩展多媒体无线通信研究领域，提供优化理论和研究方法具有重要的意义。

中文关键词： 协作；无线网络；多媒体；效率；服务质量

英文摘要： Facing the mass wireless communication needs and multimedia transmission efficiency bottleneck, the traditional network transmission technology has not guaranteed wireless multimedia applications service quality already. In order to improve the quality of multimedia transmission without change of network hardware, this study aims to improve the multimedia transmission and enhance network utility based on the cooperative diversity. 1) Introducing the discrete utility function to characterize user's perception, a wireless multicast resource optimization model is proposed base on user perception differentiation and cooperative diversity to enhance QoE(Quality of Experience) and efficiency of network. 2) Considering the dependence of multi-flows, a wireless resource optimization model is presented based on mission-oriented and cooperative diversity to enhance QoE and resource allocation. The network utility will be increased by 10% in the same experimental conditions.Research results will upgrade the QoS (Quality of Service) of wireless multimedia, optimize resource allocation and improve the efficiency of resource utility. This study is of great significance in that it extends and complements the research field of wireless multimedia, provides optimization theory and research method.

英文关键词： cooperation；wireless network；multimedia；utility；QoS