Buffer-Aided Max-Link Relay Selection in Amplify-and-Forward Cooperative Networks

Author

Zhao Tian ; Gaojie Chen ; Yu Gong ; Zhi Chen ; Chambers, Jonathon A.

Author_Institution

Adv. Signal Process. Group, Loughborough Univ., Loughborough, UK

Volume

64

Issue

2

fYear

2015

fDate

Feb. 2015

Firstpage

553

Lastpage

565

Abstract

This paper investigates the outage performance of an amplify-and-forward (AF) relay system that exploits buffer-aided max-link relay selection. Both asymmetric and symmetric source-to-relay and relay-to-destination channel configurations are considered. We derive the closed-form expressions for the outage probability and analyze the average packet delays. We prove that the diversity order is between N and 2N (where N is the relay number), corresponding to a relay buffer size between 1 and ∞, respectively. We also analytically show the coding gain. Numerical results are given to verify the theoretical analyses.

Keywords

amplify and forward communication; cooperative communication; encoding; probability; relay networks (telecommunication); telecommunication network reliability; AF relay system; amplify-and-forward cooperative network; average packet delay; buffer-aided max-link relay selection; closed-form expression; coding gain; outage performance; outage probability; relay buffer size; relay-to-destination channel configuration; source-to-relay channel configuration; Buffer storage; Delays; Encoding; Fading; Quantization (signal); Relays; Signal to noise ratio; Amplify-and-forward (AF); buffer-aided; cooperative networks; relay selection;

fLanguage

English

Journal_Title

Vehicular Technology, IEEE Transactions on

Publisher

ieee

ISSN

0018-9545

Type

jour

DOI

10.1109/TVT.2014.2324761

Filename

6817619