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.

中文翻译：

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定位辅助毫米波通信的波束宽度优化和资源划分方案

我们研究了沿市区道路部署的毫米波无线网络，以同时支持室外移动用户的定位和通信服务。在该网络中，我们提出了一种基于定位边界的毫米波初始波束选择方案，与传统的独立毫米波基站 (BS) 初始接入方案相比，该方案大大降低了初始接入延迟。然后，我们介绍了一种下行传输协议，其中无线帧分为三个阶段，分别是初始接入、数据和定位。我们在毫米波系统的定位和通信性能之间建立了权衡，并展示了增强的定位如何实际提高数据通信性能。我们的结果表明，密集的 BS 部署能够为数据阶段分配更多资源，同时仍保持可观的定位性能。此外，对于稀疏部署和大波束字典大小（即，具有更细波束）的情况，必须向定位阶段分配更多资源以优化速率覆盖。根据我们的结果，我们为将部署第一代毫米波基站的网络运营商提供了一些系统设计见解和尺寸规则。