定位辅助毫米波通信的波束宽度优化和资源划分方案
Beamwidth Optimization and Resource Partitioning Scheme for Localization Assisted mm-wave Communications
摘要：
我们研究了一个毫米波无线网络部署在城市道路沿线，同时支持定位和通信服务的户外移动用户。在这个网络中，我们提出了一个毫米波初始波束选择方案的基础上定位边界，这大大减少了初始接入延迟相比，传统的初始接入方案的独立毫米波基站（BS）。然后，我们介绍了一个下行链路传输协议，其中的无线帧分为三个阶段，即初始接入，数据和定位，分别。我们建立了毫米波系统的本地化和通信性能之间的权衡，并显示如何增强本地化实际上可以提高数据通信性能。我们的研究结果表明，密集的BS部署，使分配更多的资源的数据阶段，同时仍然保持可观的本地化性能。此外，对于稀疏部署和大波束字典大小的情况（即，使用更细的波束），必须将更多的资源分配给定位阶段以优化速率覆盖。基于我们的研究结果，我们提供了几个系统设计的见解和尺寸规则的网络运营商，将部署第一代毫米波基站。
英文摘要：
We study a mm-wave wireless network deployed along the roads of an urban area, to support localization and communication services simultaneously for outdoor mobile users. In this network, we propose a mm-wave initial beam-selection scheme based on localization-bounds, which greatly reduces the initial access delay as compared to traditional initial access schemes for standalone mm-wave base station (BS). Then, we introduce a downlink transmission protocol, in which the radio frames are partitioned into three phases, namely, initial access, data, and localization, respectively. We establish a trade-off between the localization and communication performance of mm-wave systems, and show how enhanced localization can actually improve the data-communication performance. Our results suggest that dense BS deployments enable to allocate more resources to the data phase while still maintaining appreciable localization performance. Furthermore, for the case of sparse deployments and large beam dictionary size (i.e., with thinner beams), more resources must be allotted to the localization phase for optimizing the rate coverage. Based on our results, we provide several system design insights and dimensioning rules for the network operators that will deploy the first generation of mm-wave BSs.
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