Title :
Improved HARQ based on network coding and its application in LTE
Author :
Lang, Yidong ; Wübben, Dirk ; Dekorsy, Armin ; Braun, Volker ; Doetsch, Uwe
Author_Institution :
Univ. of Bremen, Bremen, Germany
Abstract :
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.
Keywords :
Long Term Evolution; automatic repeat request; network coding; CC; HARQ transmission scheme; IR; LTE link-level simulations; XOR; chase combing; erroneous packets; hybrid automatic repeat request techniques; incremental redundancy; network coded packet; network coding; soft combining methods; wireless unicast scenarios; Convolutional codes; Decoding; Network coding; Redundancy; Signal to noise ratio; Systematics; Throughput; Chase Combining; HARQ; Incremental Redundancy; Network coding; XOR;
Conference_Titel :
Wireless Communications and Networking Conference (WCNC), 2012 IEEE
Conference_Location :
Shanghai
Print_ISBN :
978-1-4673-0436-8
DOI :
10.1109/WCNC.2012.6214109
