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Mobile Information Systems
Volume 2017, Article ID 7461803, 8 pages
https://doi.org/10.1155/2017/7461803
Research Article

Performance Analysis of Secrecy Outage Probability for AF-Based Partial Relay Selection with Outdated Channel Estimates

Department of Electronic Engineering, Kyungil University, Gyeongbuk, Republic of Korea

Correspondence should be addressed to Kyu-Sung Hwang; rk.ca.uik@gnawhsk

Received 26 April 2017; Accepted 22 June 2017; Published 27 August 2017

Academic Editor: Michele Garetto

Copyright © 2017 Kyu-Sung Hwang. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

We study the secrecy outage probability of the amplify-and-forward (AF) relaying protocol, which consists of one source, one destination, multiple relays, and multiple eavesdroppers. In this system, the aim is to transmit the confidential messages from a source to a destination via the selected relay in presence of eavesdroppers. Moreover, partial relay selection scheme is utilized for relay selection based on outdated channel state information where only neighboring channel information (source-relays) is available and passive eavesdroppers are considered where a transmitter does not have any knowledge of eavesdroppers’ channels. Specifically, we offer the exact secrecy outage probability of the proposed system in a one-integral form as well as providing the asymptotic secrecy outage probability in a closed-form. Numerical examples are given to verify our provided analytical results for different system conditions.