A Comparative Analysis of Secrecy Rates of Wireless Two-Way Relay Systems

Chih-Hua Chang*, Ronald Y. Chang, Yu-Chih Huang

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

3 Scopus citations

Abstract

This paper studies the information-theoretic secrecy rates of wireless two-way relay systems where two users wish to exchange information through a single relay with an eavesdropper observing all communications. We formulate and compare the achievable secrecy rates of the system that employs one of the three common relay protocols: conventional decode-and-forward (DF), DF with network coding (NC), and compute-and-forward (CF) based on physical-layer network coding (PNC). We show that CF based on PNC achieves the highest secrecy rate at high signal-to-noise ratio (SNR), while, interestingly, the other two protocols have mixed performance depending on the power allocation scheme and network topology. Our study offers insights into designing wireless two-way relay protocols from a secrecy perspective.

Original languageEnglish
Title of host publication2015 IEEE GLOBAL COMMUNICATIONS CONFERENCE (GLOBECOM)
PublisherIEEE
Number of pages6
DOIs
StatePublished - 2015
EventIEEE Global Telecommunications Conference (GLOBECOM) - San Diego, Canada
Duration: 6 Dec 201510 Dec 2015

Publication series

NameIEEE Global Communications Conference
PublisherIEEE
ISSN (Print)2334-0983

Conference

ConferenceIEEE Global Telecommunications Conference (GLOBECOM)
CountryCanada
CitySan Diego
Period6/12/1510/12/15

Keywords

  • Two-way relaying
  • information-theoretic security
  • physical-layer security
  • network coding
  • physical-layer network coding
  • CONFIDENTIAL MESSAGES
  • BROADCAST CHANNELS
  • TAP CHANNEL
  • NETWORK

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