Uplink performance analysis of a drone cell in a random field of ground interferers
Uplink performance analysis of a drone cell in a random field of ground interferers
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地面干扰随机场中无人机小区的上行链路性能分析
DOI：
10.1109/wcnc.2018.8377426
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发表时间：
2017
期刊：
影响因子：
--
通讯作者：
S. Pollin
中科院分区：
文献类型：
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作者：
M. M. Azari;Fernando Rosas;A. Chiumento;Amir Ligata;S. Pollin
空中基站是一项很有前途的技术，可以提高现有通信网络的能力。然而，现有的分析框架并没有充分描述地面干扰源对空中基站的影响。为了解决这个问题，我们模拟了来自共存地面网络的干扰对空中链路的影响，这可能是无人机基站服务的空中小区的上行链路。通过考虑地面干扰源的泊松场，我们描述了无人机所经历的总干扰的特征。该结果包括无人机天线方向图、高度相关阴影和各种环境类型的影响。我们的研究表明，无人机在高海拔地区从更好的视距 (LoS) 中获得的好处会被地面干扰的高度脆弱性所抵消。然而，通过推导链路覆盖概率和传输速率，我们表明，如果根据给定的干扰源密度和传输功率正确确定整个系统的尺寸，无人机基站仍然是一项有前途的技术。特别是，我们的结果说明了如何通过定义最佳无人机高度和信号干扰比 (SIR) 要求来最大化此类网络的优势。
Aerial base stations are a promising technology to increase the capabilities of existing communication networks. However, existing analytical frameworks do not sufficiently characterize the impact of ground interferers on aerial base stations. In order to address this issue, we model the effect of interference coming from coexisting ground networks on the aerial link, which could be the uplink of an aerial cell served by a drone base station. By considering a Poisson field of ground interferers, we characterize aggregate interference experienced by the drone. This result includes the effect of drone antenna pattern, the height-dependent shadowing, and various types of environment. We show that benefits a drone obtains from a better line-of-sight (LoS) at high altitudes is counteracted by a high vulnerability to the interference coming from ground. However, by deriving link coverage probability and transmission rate we show that a drone base station is still a promising technology if the overall system is properly dimensioned according to given density and transmission power of interferers. Particularly, our results illustrate how benefits of such network is maximized by defining the optimal drone altitude and signal-to-interference (SIR) requirement.