NDLI: Buffer-aided relaying: a survey on relay selection policies

Content Provider	IET Digital Library
Author	Rajab, Mirna El Rjeily, Chadi Abou Kfouri, Ronald
Abstract	Ever since the idea of buffers was incorporated in wireless communications, buffer-aided relaying has become an emerging breakthrough in the world of transmitting and receiving signals. Equipping the relays with buffers adds a new degree of freedom capable of enhancing numerous quality-of-service (QoS) metrics including throughput, outage probability, power efficiency and physical-layer security. The QoS enhancement is achieved by compromising the end-to-end delay that is inflicted by storing the packets in the relays' buffers until a suitable source–relay or relay–destination link is selected. In this context, the selection of a relay for transmission/reception is important since it governs the QoS-delay trade-off that can be contemplated. In this survey, the authors review and analyse various link selection protocols in buffer-aided relaying systems. These relaying strategies are categorised and contrasted according to their performance levels, limitations, applications, system model assumptions and complexity. Finally, they discuss current challenges, and highlight future research directions.
Starting Page	3715
Ending Page	3734
Page Count	20
ISSN	17518628
Volume Number	14
e-ISSN	17518636
Issue Number	Issue 21, Dec (2020)
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/iet-com/14/21
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/10.1049/iet-com.2020.0532
Journal	IET Communications
Publisher Date	2021-01-08
Access Restriction	Open
Rights Holder	© The Institution of Engineering and Technology
Subject Keyword	Buffer-aided Relaying System End-to-end Delay Link Selection Protocol Outage Probability Physical Layer Security Power Efficiency Probability Protocol QoS Enhancement QoS-delay Trade-off Quality of Service Quality of Service Metrics Radio Link And Equipment Receiving Signal Relay Network Relay Selection Policy Relay-destination Link Reliability Source-relay Link Statistics Telecommunication Telecommunication Network Reliability Telecommunication Security Transmitting Signal Wireless Communication
Content Type	Text
Resource Type	Article
Subject	Electrical and Electronic Engineering Computer Science Applications

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