Practical network coding for two way relay channels in LTE networks

Hassan Hamdoun, Pavel Loskot, Timothy O’Farrell, Jianhue He

Research output: Chapter in Book/Report/Conference proceedingPublished conference contribution

10 Citations (Scopus)


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.
Original languageEnglish
Title of host publicationVehicular Technology Conference (VTC Spring), 2011 IEEE 73rd
PublisherInstitute of Electrical and Electronics Engineers (IEEE)
Number of pages5
ISBN (Print)978-1-4244-8332-7
Publication statusPublished - 2011
EventIEEE VTC11-Spring, 2nd GreeNet workshop - Budapest, Hungary
Duration: 15 May 201118 May 2011


ConferenceIEEE VTC11-Spring, 2nd GreeNet workshop


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