TY - JOUR
T1 - Transmitting important bits and sailing high radio waves
T2 - A decentralized cross-layer approach to cooperative video transmission
AU - Mastronarde, Nicholas
AU - Verde, Francesco
AU - Darsena, Donatella
AU - Scaglione, Anna
AU - Schaar, Mihaela Van Der
N1 - Funding Information:
Manuscript received 1 February 2011; revised 20 July 2011. The work of M. van der Schaar and N. Mastronarde was supported in part by NSF grant no. 0831549 and of A. Scaglione by NSF grant no. 905267. N. Mastronarde is with the Department of Electrical Engineering, State University of New York at Buffalo, NY, USA (e-mail: nmastron@buffalo.edu). F. Verde is with the Department of Biomedical, Electronic and Telecommunication Engineering, University Federico II, Naples, Italy (e-mail: f.verde@unina.it). D. Darsena is with the Department for Technologies, Parthenope University, Naples, Italy (e-mail: darsena@unina.it). A. Scaglione is with the Department of Electrical and Computer Engineering, University of California Davis, CA, USA (e-mail: ascaglione@ucdavis.edu). M. van der Schaar is with the Department of Electrical Engineering, University of California at Los Angeles (UCLA), CA, USA (e-mail: mi-haela@ee.ucla.edu). Digital Object Identifier 10.1109/JSAC.2012.121002.
PY - 2012
Y1 - 2012
N2 - 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.
AB - 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.
KW - Cooperative communications
KW - Markov decision process
KW - cross-layer optimization
KW - wireless video transmission
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U2 - 10.1109/JSAC.2012.121002
DO - 10.1109/JSAC.2012.121002
M3 - Article
AN - SCOPUS:84866908905
SN - 0733-8716
VL - 30
SP - 1597
EP - 1604
JO - IEEE Journal on Selected Areas in Communications
JF - IEEE Journal on Selected Areas in Communications
IS - 9
M1 - 6311216
ER -