An efficient network coding scheme for two-way communication with ARQ feedback

Zhu, Hongyi; Smida, Besma; Love, David J.

doi:10.1109/icc.2016.7511501

Cited by 4 publications

(1 citation statement)

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“…During retransmissions in downlink and uplink, each user can overhear other users' packets as side-information. To utilize the side-information and improve the throughput performance, we propose a network coding scheme with reverse-link assistance (NC-RLA) that allows users to send network-coded packets (NCPs) on the uplink to help the downlink, which has been partially discussed in our preliminary work work [32]. Compared to the scheme proposed in [24], our strategy utilizes the side-information overheard during both downlink and uplink to improve the downlink throughput performance without hurting the uplink transmissions.…”

Section: B Contributionsmentioning

confidence: 99%

An Efficient Network-Coded ARQ Scheme for Two-Way Wireless Communication With Full-Duplex Relaying

2019

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There has been renewed interest in using relaying systems as a low-cost solution in next generation wireless broadband networks. In this paper, we take a fresh look at relaying and propose a new retransmission protocol for a two-way wireless network with one base-station, one full-duplex relay and multiple users exchanging messages over fading channels. In this scenario, the relay and each user may hear the message from the base-station and other users. To improve the throughput, we apply networkcoded ARQ with reverse-link assistance (NC-RLA) at the relay to exploit the overheard side-information acquired from both the downlink and uplink. We analyze the throughput performance enhancements of NC-RLA and validate our mathematical derivations with Monte Carlo simulation. The simulation results show that significant throughput improvements are obtained with the NC-RLA scheme for low/moderate SNRs. We also prove that full-duplex relay increases the throughput if it is located at the optimal position. Otherwise, it is not beneficial to add a relay, especially with a large number of users using network coding.INDEX TERMS Automatic repeat request (ARQ), full-duplex relay, network coding, outage probability, two-way communication, throughput analysis.

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Section: B Contributionsmentioning

confidence: 99%