Improved HARQ based on network coding and its application in LTE

In this paper, a novel HARQ transmission scheme based on network coding is proposed for wireless unicast scenarios. Instead of retransmitting erroneous packets individually, a network coded packet constructed by the XOR of two erroneous packets is transmitted similar to network coding. In order to f...

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Bibliographic Details
Main Authors: Yidong Lang, Wubben, D., Dekorsy, A., Braun, V., Doetsch, U.
Format: Conference Proceeding
Language:English
Subjects:
Chase Combining
Convolutional codes
Decoding
HARQ
Incremental Redundancy
Network coding
Redundancy
Signal to noise ratio
Systematics
Throughput
XOR
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Description
Summary:In this paper, a novel HARQ transmission scheme based on network coding is proposed for wireless unicast scenarios. Instead of retransmitting erroneous packets individually, a network coded packet constructed by the XOR of two erroneous packets is transmitted similar to network coding. In order to fully exploit the network coded packet in combination with the previously received erroneous packets, soft combining methods with respect to Chase Combing (CC) and Incremental Redundancy (IR) are developed. The expected throughput gain of 33% for one retransmission for the proposed solution compared to common HARQ transmission is confirmed by LTE link-level simulations.
ISSN:1525-3511
1558-2612
DOI:10.1109/WCNC.2012.6214109