Dynamic method of network coding based retransmission for wireless multicast

• Published in: 2014 IEEE/CIC International Conference on Communications in China (ICCC) pp. 658 - 663
• Main Authors: Houyi Li, Ying Li
• Format: Conference Proceeding
• Language: English
• Published: IEEE 01.10.2014
• Subjects: Automatic repeat request; Decoding; Delays; Network coding; Probability density function; Vectors; Wireless communication
• DOI: 10.1109/ICCChina.2014.7008358
• ISSN: 2377-8644

In wireless single-hop multicast with network coding based Automatic Repeat reQuest (NC-ARQ) scheme, the sender needs to combine one or several lost packets as one retransmission packet to reduce the number of multicast transmissions. This paper proposes a new scheme, called Dynamic Network Coding based ARQ (DNC-ARQ), to improve the efficiency of the multicast transmissions. The main idea is to allow the BS to select the combination for the lost packets in dynamic range: the BS would not retransmit for a lost packet until an optimum combination is found or the lost packet achieve the maximum delay. We also derive the upper and low bound of DNC-ARQ scheme and give a practical algorithm. Both theoretical analysis and simulation results confirm the proposed scheme hold more efficient and less decoding delay than the traditional NC-ARQ.