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Energy-efficient communication for user-relay aided cellular networks with OFDMA

机译：具有OFDMA的用户中继辅助蜂窝网络的节能通信

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摘要

The dramatic increase of mobile devices and mobile subscriptions for delay-sensitive high-rate multimedia services has caused rapidly rising energy consumption, which is a big problem for the next generation wireless networks. It is urgent to find solutions that can satisfy the high data rate quality of service (QoS) requirements from users and obtain high energy-efficiency (EE) for the network at the same time. In this paper, energy-efficient communication is investigated for the orthogonal frequency-division multiple-access (OFDMA) based user-relay aided cellular networks that is envisioned as a promising technology to unlock the full potential of 5G networks. The EE maximization problem is formulated for dual-hop user-relay aided downlink cellular networks. Decode-and-forward (DF) relaying strategy is used by considering the QoS constraints. Since the formulated problem is a mixed-integer non-linear programming problem (MINLP) that is difficult to solve for multi-carrier, multi-user, multi-relay networks, a two-stage radio resource management solution is proposed to tackle the problem. The advantages of the proposed scheme, which not only considers the EE but also meets the data rate requirements of the users, are revealed by performing extensive simulations. (C) 2019 Elsevier B.V. All rights reserved.
机译：移动设备和移动订阅的急剧增加导致能耗迅速上升，这对于下一代无线网络是一个大问题。迫切需要找到可以满足用户的高数据速率质量（QoS）要求的解决方案，并同时获得网络的高能效率（EE）。在本文中，研究了基于正交频分多访问（OFDMA）的用户中继辅助蜂窝网络的节能通信，该网络被设想为有希望的技术来解锁5G网络的全部电位。 EE最大化问题被配制用于双跳用户 - 中继辅助下行链路蜂窝网络。通过考虑QoS限制来使用解码和前进（DF）中继策略。由于配制的问题是混合整数非线性编程问题（MINLP），难以解决多载波，多用户，多中继网络，提出了一个两级无线电资源管理解决方案来解决问题。通过进行广泛的模拟，揭示了所提出的方案的优点，不仅考虑EE，而且符合用户的数据率要求。 （c）2019 Elsevier B.v.保留所有权利。

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