NDLI: Online and robust resource allocation for D2D communications assisted by Green relays

Content Provider	IET Digital Library
Author	Han, Qiaoni Yang, Bo Wang, Xiaocheng
Abstract	Device-to-device (D2D) communications in cellular networks allow proximity users to communicate directly without going through the base station. Concentrating on scenarios where the direct communication between potential D2D users may not be reliable due to poor proximity and link condition, and paying attention to energy harvesting wireless communications, this study focuses on the green relay-assisted D2D communications, where long-term evolution-advanced layer-3 relays powered by renewable energy are employed. To achieve the trade-off between system capacity maximisation and user fairness, the authors formulate an offline resource block (RB) and power allocation problem under imperfect channel information with the objective of maximising the weighted sum-rate of all users. Then, based on battery dynamics, the original problem is reformulated as an online one with energy outage avoidance. To obtain distributed solutions, the online problem is further transformed into a convex one, and the rate outage-probability requirement is also converted for tractability. Finally, applying Lagrangian duality, the distributed RB and power allocation is derived, which is globally optimal to the reformulated online problem. Comparing with a baseline scheme where all users communicate directly without assistance of relays, numerical results show the superiority of the proposed approach in terms of the average achievable data rate.
Starting Page	3547
Ending Page	3557
Page Count	11
ISSN	17518628
Volume Number	13
e-ISSN	17518636
Issue Number	Issue 20, Dec (2019)
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/iet-com/13/20
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/10.1049/iet-com.2019.0363
Journal	IET Communications
Publisher Date	2019-10-04
Access Restriction	Open
Rights Holder	© The Institution of Engineering and Technology
Subject Keyword	Average Achievable Data Rate Base Station Cellular Network Cellular Radio Device-to-device Communication Direct Communication Distributed RB Energy Harvesting Energy Outage Avoidance Green Relay Green Relay-assisted D2D Imperfect Channel Information Link Condition Long Term Evolution Long-term Evolution-advanced Layer-3 Relay Mobile Radio System Offline Resource Block Optimisation Optimisation Technique Poor Proximity Power Allocation Probability Proximity User Radio Link And Equipment Rate Outage-probability Requirement Reformulated Online Problem Relay Network Renewable Energy Resource Allocation Robust Resource Allocation Statistics Telecommunication Trade-off between System Capacity Maximisation User Fairness Weighted Sum-rate
Content Type	Text
Resource Type	Article
Subject	Electrical and Electronic Engineering Computer Science Applications

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