CAREER: New Paradigm for Wireless Multimedia Communication Systems with Resource and Information Exchanges

职业：具有资源和信息交换的无线多媒体通信系统的新范式

• 批准号: 0448489
• 负责人: Mihaela van der Schaar
• 金额: --
• 依托单位: University of California-Davis
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2005
• 资助国家: 美国
• 起止时间: 2005-07-01 至 2005-09-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0448489&HistoricalAwards=false
• 关键词: CAREER; New; Paradigm; Wireless; Multimedia

Existing wireless networks provide dynamically varying resources with limited quality of service support for multimedia applications, which often results in unsatisfactory user experience. This research addresses these challenges by introducing a new communication paradigm that allows competing wireless stations to dynamically exchange communication and computation resources. This paradigm was inspired by a successful economics concept known as "coopetition", which suggests that a judicious mixture of competition and cooperation is advantageous in competitive environments. When applied to wireless multimedia systems, this research fundamentally changes the passive way stations currently adapt their transmission strategies to match available wireless and power resources, by enabling them to proactively influence the wireless systems dynamics through resource and information exchange. To achieve this, the investigator models wireless stations as rational players competing for available wireless resources in a dynamic repeated game. Optimal resource exchange policies are determined for different application requirements, wireless conditions, multimedia content, and different levels of collaboration and advantages of forming coalitions among applications/stations are explored. In the new proactive paradigm, the resource exchanges are made possible by adapting the transmission strategies of the participating stations. Currently, these strategies are optimized at the lower OSI layers without considering the multimedia traffic characteristics. This research develops a new cross-layer optimization framework that adapts to varying channel conditions and available resources, while explicitly considering the specific characteristics and requirements of wireless multimedia applications. Moreover, to enable different resource exchanges, user-centric scalable multimedia coding and streaming algorithms are investigated that consider the user experience and stations resources. This research considers both existing wireless networks and next-generation Spectrum Agile Radio networks in which stations can utilize multiple channels, thereby dynamically gathering additional resources to satisfy multimedia requirements.

现有的无线网络为多媒体应用程序提供动态变化的资源，服务质量有限，这通常会导致用户体验不令人满意。这项研究通过引入新的通信范式来解决这些挑战，该范式允许竞争无线站动态交流通信和计算资源。该范式的灵感来自一个成功的经济学概念，即“合作”，这表明竞争与合作的明智混合在竞争环境中是有利的。当应用于无线多媒体系统时，这项研究从根本上改变了当前的被动方式站点，以使其传输策略适应可用的无线和电源资源，从而使它们能够通过资源和信息交换主动影响无线系统动态。为了实现这一目标，研究人员将无线电台建模为理性玩家在动态重复的游戏中争夺可用的无线资源。探索了针对不同应用要求，无线条件，多媒体内容以及不同级别的协作以及在应用程序/站点组建联盟的优势的最佳资源交换策略。在新的主动范式中，通过调整参与站的传输策略来实现资源交流。当前，这些策略在下层OSI层进行了优化，而无需考虑多媒体交通特征。这项研究开发了一个新的跨层优化框架，该框架适应了不同的渠道条件和可用资源，同时明确考虑了无线多媒体应用的特定特征和要求。此外，为了启用不同的资源交换，研究了以用户为中心的可扩展多媒体编码和流算算法，这些算法考虑了用户体验和电台资源。这项研究考虑了现有的无线网络和下一代光谱敏捷无线电网络，其中电台可以利用多个渠道，从而动态收集其他资源来满足多媒体要求。