Title :
Joint network coding and OFDMA based MAC-layer in PLC networks
Author :
Ezzine, Sana ; Abdelkefi, Fatma ; Cances, Jean Pierre ; Meghdadi, Vahid ; Bouallegue, Ammar
Author_Institution :
XLIM, Univ. of Limoges, Limoges, France
fDate :
March 30 2014-April 2 2014
Abstract :
Due to the existing frequency-selectivity in PLC channels, data transmission over long distance can exhibit serious difficulties in PLC systems. In order to reduce the attenuation effect for long transmission distances between two nodes (a transmitter and a receiver), we use a relay in PLC systems. Many considerations are taken into account in this system such as the variation of the distances between the transmitter and the relay and between the relay and the receiver. We highlight in this paper how the use of network coding makes it possible to increase the transmitted data rate in an OFDMA based MAC layer. In order to maximize the total data rate, we propose low-complexity subcarrier assignment algorithms for the uplink and downlink of OFDMA based PLC networks. Simulation results are given to support our claims and highlight the performance gain that can be obtained for PLC systems in terms in enhancement of the transmission rate.
Keywords :
OFDM modulation; access protocols; carrier transmission on power lines; channel allocation; data communication; frequency division multiple access; network coding; radio receivers; radio transmitters; relay networks (telecommunication); OFDMA based MAC layer; OFDMA based PLC network; PLC channel; data transmission; frequency selectivity; joint network coding; low complexity subcarrier assignment algorithm; receiver; relay; transmitted data rate; transmitter; Attenuation; Bit error rate; Downlink; Network coding; OFDM; Relays; Resource management;
Conference_Titel :
Power Line Communications and its Applications (ISPLC), 2014 18th IEEE International Symposium on
Conference_Location :
Glasgow
DOI :
10.1109/ISPLC.2014.6812363
