Analysis of device‐to‐device communications with exclusion regions underlaying 5G networks
Analysis of device‐to‐device communications with exclusion regions underlaying 5G networks
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DOI：
10.1002/ett.2854
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发表时间：
2015-01
影响因子：
3.6
通讯作者：
Xiaohui Xu;Haibo Wang;Hao Feng;C. Xing
中科院分区：
文献类型：
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作者：
Xiaohui Xu;Haibo Wang;Hao Feng;C. Xing
蜂窝网络下的设备到设备（D2 D）通信是提高频谱效率和减轻基站业务负载的有效方式，因此它被认为是第五代移动的通信（也称为IMT-2020）中的关键技术之一。然而，它也引入了D2 D终端和蜂窝用户之间的干扰。在这项工作中，我们采用排除区域（ER）和开环分数功率控制（OFPC）来减轻多小区上行链路频谱共享场景中的D2 D到蜂窝干扰。我们使用随机几何推导出中断概率（OP）和区域频谱效率（ASE）的闭合形式表达式，并揭示了D2 D用户设备（DUE）密度与蜂窝用户设备（CUE）密度（换句话说，每个小区有多少DUE可以重用CUE的资源）、D2 D通信距离、不同ER大小以及OFPC中的补偿因子的影响。仿真结果表明，采用ER既能降低蜂窝用户的OP，又能提高网络ASE，网络运营商可以根据其目标OP、D2 D用户密度和D2 D用户通信距离来选择合适的ER半径。版权所有© 2014约翰威利父子有限公司.
Device‐to‐device (D2D) communication underlaying cellular networks is an effective way to improve spectral efficiency and alleviate the traffic load of base stations, therefore it is considered as one of the key technologies in the fifth generation mobile communications, also referred to as IMT‐2020. However, it also introduces interference between D2D terminals and cellular users. In this work, we adopt both exclusion regions (ERs) and open‐loop fraction power control (OFPC) to mitigate the D2D‐to‐Cellular interference in a multicell uplink spectrum‐sharing scenario. We derive the closed‐form expressions of outage probability (OP) and area spectral efficiency (ASE) using stochastic geometry, and reveal the impact of the D2D user equipment (DUE) density versus cellular user equipment (CUE) density (in other words, how many DUEs can reuse the resource of a CUE per cell), D2D communication distance, different ER sizes, and of the compensation factor in OFPC. Numerical results show that adopting ERs could both decrease the OP of cellular users and increase the network ASE, and a proper ER radius can be selected by network operators according to their target OP, D2D users' density, and the communication distance of D2D users. Copyright © 2014 John Wiley & Sons, Ltd.