Collaborative Research: Delay-Sensitive Hybrid Broadcast/Unicast Traffic over Heterogeneous Cellular Networks

合作研究：异构蜂窝网络上的延迟敏感混合广播/单播流量

• 批准号: 1509047
• 负责人: Hongxiang Li
• 金额: $ 20万
• 依托单位: University of Louisville Research Foundation Inc
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2015
• 资助国家: 美国
• 起止时间: 2015-06-01 至 2019-05-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1509047&HistoricalAwards=false
• 关键词: Collaborative; Research; Delay; Sensitive; Hybrid

In cellular networks, wireless traffic can be categorized into broadcast traffic and unicast traffic where broadcast is defined as the unidirectional delivery of common information such as mobile TV from the base station (BS) to many users; unicast refers to the delivery of private information such as voice telephony and wireless data access, which requires a bi-directional network. Because a significant portion of the mobile data traffic is delay-sensitive, future cellular networks will face the dual challenge of supporting large traffic volumes and providing reliable service for delay-sensitive applications. On the other hand, wireless community across the globe is facing severe spectrum shortage. The goal of this project is to maximize the spectrum utilization efficiency and guarantee quality of service for delay-sensitive hybrid broadcast/unicast traffic by studying new collaborative spectrum sharing and resource allocation technologies for heterogeneous cellular networks.Intellectual Merits: This project defines new performance metrics that can accurately measure the spectrum utilization efficiency as well as the quality of service requirements of delay-sensitive wireless traffic. In particular, the concept of hybrid rate region is defined to simultaneously characterize the broadcast outage capacity and unicast effective capacity. To maximize the hybrid rate region, a two-pronged approach is proposed to achieve a synthesis of pragmatism and fundamentally new principles to systems engineering. The proposed research activities are streamlined into two mutually supportive thrusts: (1) maximize the hybrid rate region for the single-cell cellular network using both orthogonal and non-orthogonal spectrum sharing technologies; (2) maximize the hybrid rate region for a multi-cell heterogeneous cellular network where macro base stations and low power relay nodes are overlaid in the coverage area. The project outcomes include enabling spectrum sharing and resource allocation technologies that are heavily dependent on the delay-sensitivity of the underlying traffic, and characterization of optimal network topology for heterogeneous cellular networks with hybrid broadcast/unicast traffic.Broader Impacts: The project addresses the worldwide spectrum shortage for broadband cellular network. It has potential impact on emerging wireless industrial standards and practices, such that the research outputs will likely influence and transform, rather than follow, scientific and technological trends. Meanwhile, the PIs will recruit students of underrepresented groups in Kentucky and Kansas, including Native American, female, low incoming and first generation students to participate in the project. By collaborating with the McNair program, the PIs will broaden the participation of underrepresented groups in electrical engineering.

在蜂窝网络中，无线业务可以分为广播业务和单播业务，其中广播被定义为从基站(BS)向许多用户单向传送诸如移动电视之类的公共信息；单播是指诸如语音电话和无线数据接入之类的私有信息的传送，这需要双向网络。由于很大一部分移动数据流量是延迟敏感的，未来的蜂窝网络将面临支持大流量和为延迟敏感应用提供可靠服务的双重挑战。另一方面，全球无线社区正面临严重的频谱短缺。该项目的目标是通过研究新的针对异质蜂窝网络的协作频谱共享和资源分配技术来最大化延迟敏感的混合广播/单播业务的频谱利用效率和服务质量。特别是，定义了混合速率域的概念，以同时表征广播中断容量和单播有效容量。为了最大化混合率区域，提出了一种双管齐下的方法，以实现实用主义和系统工程的根本新原则的综合。所提出的研究活动被简化为两个相互支持的推力：(1)使用正交和非正交频谱共享技术最大化单小区蜂窝网络的混合速率区域；(2)最大化覆盖区域内覆盖宏基站和低功率中继节点的多小区异质蜂窝网络的混合速率区域。该项目的成果包括启用严重依赖底层业务延迟敏感性的频谱共享和资源分配技术，以及针对具有混合广播/单播业务的异类蜂窝网络的最佳网络拓扑的特征。广泛影响：该项目解决了全球宽带蜂窝网络的频谱短缺问题。它对新兴的无线工业标准和实践有潜在的影响，因此研究成果可能会影响和改变科学和技术趋势，而不是跟随。与此同时，PIS将在肯塔基州和堪萨斯州招募代表不足的群体的学生，包括美国原住民、女性、低收入学生和第一代学生参与该项目。通过与麦克奈尔计划的合作，私人投资机构将扩大电气工程领域代表不足的群体的参与。