Relay vs. user cooperation in multiaccess networks

Lalitha Sankar, Gerhard Kramer, Narayan B. Mandayam

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

The performance of user-cooperation in a multiaccess network is compared to that of using a wireless relay. Using the total transmit and processing power consumed at all nodes as a cost metric, the outage probabilities achieved by dynamic decode-and-forward (DDF) and amplify-and-forward (AF) are compared for the two networks. A high SNE outage analysis in conjunction with area-averaged numerical simulations is used to show that user and relay cooperation can achieve a maximum diversity of Κ and 2 respectively for a Κ-user multiaccess network under both DDF and AF. However, by accounting for the energy costs of cooperation it is shown that relay cooperation is more energy efficient than user cooperation, i.e., it achieves coding (SNE) gains that override the diversity advantage of the latter.

Original languageEnglish (US)
Title of host publication45th Annual Allerton Conference on Communication, Control, and Computing 2007
PublisherUniversity of Illinois at Urbana-Champaign, Coordinated Science Laboratory and Department of Computer and Electrical Engineering
Pages381-388
Number of pages8
Volume1
ISBN (Print)9781605600864
StatePublished - 2007
Externally publishedYes
Event45th Annual Allerton Conference on Communication, Control, and Computing 2007 - Monticello, United States
Duration: Sep 26 2007Sep 28 2007

Other

Other45th Annual Allerton Conference on Communication, Control, and Computing 2007
CountryUnited States
CityMonticello
Period9/26/079/28/07

ASJC Scopus subject areas

  • Computer Science Applications
  • Computer Networks and Communications

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