Transmitting important bits and sailing high radio waves: A decentralized cross-layer approach to cooperative video transmission

Nicholas Mastronarde, Francesco Verde, Donatella Darsena, Anna Scaglione, Mihaela Van Der Schaar

Research output: Contribution to journalArticle

17 Scopus citations

Abstract

We investigate the impact of cooperative relaying on uplink multi-user (MU) wireless video transmissions. We analyze and simplify a MU Markov decision process (MDP), whose objective is to maximize the long-term sum of utilities across the video terminals in a decentralized fashion, by jointly optimizing the packet scheduling and physical layer, under the assumption that some nodes are willing to act as cooperative relays. The resulting MU-MDP is a pricing-based distributed resource allocation algorithm, where the price reflects the expected future congestion in the network. Compared to a non-cooperative setting, we observe that the resource price increases in networks supporting low transmission rates and decreases for high transmission rates. Additionally, cooperation allows users with feeble direct signals to significantly improve their video quality, with a moderate increase in total network energy consumption that is far less than the energy these nodes would require to achieve the same video quality without cooperation.

Original languageEnglish (US)
Article number6311216
Pages (from-to)1597-1604
Number of pages8
JournalIEEE Journal on Selected Areas in Communications
Volume30
Issue number9
DOIs
StatePublished - Oct 5 2012
Externally publishedYes

Keywords

  • Cooperative communications
  • Markov decision process
  • cross-layer optimization
  • wireless video transmission

ASJC Scopus subject areas

  • Computer Networks and Communications
  • Electrical and Electronic Engineering

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