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Please use this identifier to cite or link to this item: http://hdl.handle.net/10119/15064

Title: Lossy Forwarding HARQ for Parallel Relay Networks
Authors: Irawan, Ade
Anwar, Khoirul
Matsumoto, Tad
Keywords: hybrid ARQ
lossy forwarding
iterative decoding
relay networks
Issue Date: 2016-11-14
Publisher: Springer
Magazine name: Wireless Personal Communications
Volume: 95
Number: 2
Start page: 915
End page: 930
DOI: 10.1007/s11277-016-3805-8
Abstract: This paper proposes Lossy-Forwarding Hybrid Automatic Repeat reQuest (LF-HARQ) schemes to improve bit-error-rate (BER), packet-error-rate (PER) and throughput performances of dual-hop wireless parallel relaying systems. In contrast to the conventional lossless decode-and-forward schemes, where erroneous packets are always discarded at the relay, we introduce Lossy-Forwarding concept to HARQ technique that allows the relay nodes to forward them to the next hop, referred to as Fully LF-HARQ (FLF-HARQ) scheme. We then propose Partially LF-HARQ (PLF-HARQ) scheme, where the relaying nodes select either forwarding the erroneous packets or requesting retransmission. The mode selection is based on the confidence indicator (CI) expressing the reliability of the received packets. Since the channels are assumed to suffer from block Rayleigh fading, the CI is calculated via online measurement of mutual information, block-by-block. Results of computer simulations to verify the superiority of the proposed techniques are presented.
Rights: This is the author-created version of Springer, Ade Irawan, Khoirul Anwar, Tad Matsumoto, Wireless Personal Communications, 95(2), 2016, 915-930. The original publication is available at www.springerlink.com, http://dx.doi.org/10.1007/s11277-016-3805-8
URI: http://hdl.handle.net/10119/15064
Material Type: author
Appears in Collections:b10-1. 雑誌掲載論文 (Journal Articles)

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