Resource allocation for minimal downlink delay in two-way OFDM relaying with network coding

Ke Xiong, Pingyi Fan, Khaled Ben Letaief, Su Yi, Ming Lei

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

7 Citations (Scopus)

Abstract

This paper investigates the resource allocation problem to minimize the downlink transmission delay under power constraints for two-way relay transmission using network coding over OFDM channels, where two sources with unbalanced traffic exchange their information via a relay node with network coding deployed. Since the explicit solution to this optimization problem is hard to obtain and with extremely high computation complexity even for numerical solution, we propose low-complexity suboptimal algorithms for the problem, where subcarrier assignment is carried out by assuming an equal power distribution at first and then optimal power allocation is executed to minimize the transmission delay. By simulations, the proposed resource allocation scheme is shown to achieve less than 1.01 times the optimal delay and outperform the strategies without network coding in overwhelming majority cases.

Original languageEnglish
Title of host publication2012 IEEE International Conference on Communications, ICC 2012
Pages5343-5347
Number of pages5
DOIs
Publication statusPublished - 1 Dec 2012
Event2012 IEEE International Conference on Communications, ICC 2012 - Ottawa, ON, Canada
Duration: 10 Jun 201215 Jun 2012

Publication series

NameIEEE International Conference on Communications
ISSN (Print)1550-3607

Other

Other2012 IEEE International Conference on Communications, ICC 2012
CountryCanada
CityOttawa, ON
Period10/6/1215/6/12

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ASJC Scopus subject areas

  • Computer Networks and Communications
  • Electrical and Electronic Engineering

Cite this

Xiong, K., Fan, P., Ben Letaief, K., Yi, S., & Lei, M. (2012). Resource allocation for minimal downlink delay in two-way OFDM relaying with network coding. In 2012 IEEE International Conference on Communications, ICC 2012 (pp. 5343-5347). [6363787] (IEEE International Conference on Communications). https://doi.org/10.1109/ICC.2012.6363787