Title :
Practical Network Coding for Two Way Relay Channels in LTE Networks
Author :
Hamdoun, Hassan ; Loskot, Pavel ; O´Farrell, Timothy ; He, Jianhua
Author_Institution :
Sch. of Eng., Swansea Univ., Swansea, UK
Abstract :
In this paper, the implementation aspects and constraints of the simplest network coding (NC) schemes for a two-way relay channel (TWRC) composed of a user equipment (mobile terminal), an LTE relay station (RS) and an LTE base station (eNB) are considered in order to assess the usefulness of the NC in more realistic scenarios. The information exchange rate gain (IERG), the energy reduction gain (ERG) and the resource utilization gain (RUG) of the NC schemes with and without subcarrier division duplexing (SDD) are obtained by computer simulations. The usefulness of the NC schemes are evaluated for varying traffic load levels, the geographical distances between the nodes, the RS transmit powers, and the maximum numbers of retransmissions. Simulation results show that the NC schemes with and without SDD, have the throughput gains $0.5%$ and $25%$, the ERGs $7-12%$ and $16-25%$, and the RUGs $0.5-3.2%$, respectively. It is found that the NC can provide performance gains also for the users at the cell edge. Furthermore, the ERGs of the NC increase with the transmit power of the relay while the ERGs of the NC remain the same even when the maximum number of retransmissions is reduced.
Keywords :
Long Term Evolution; network coding; subcarrier multiplexing; telecommunication traffic; wireless channels; LTE base station; LTE network; LTE relay station; RS transmit power; computer simulation; energy reduction gain; geographical distance; information exchange rate gain; network coding; resource utilization gain; subcarrier division duplexing; traffic load level; two way relay channel; Data models; Downlink; Network coding; Protocols; Relays; Resource management; Signal to noise ratio;
Conference_Titel :
Vehicular Technology Conference (VTC Spring), 2011 IEEE 73rd
Conference_Location :
Yokohama
Print_ISBN :
978-1-4244-8332-7
DOI :
10.1109/VETECS.2011.5956329