Systems Engineering and Electronics ›› 2021, Vol. 43 ›› Issue (12): 3703-3708.doi: 10.12305/j.issn.1001-506X.2021.12.34

• Communications and Networks • Previous Articles     Next Articles

Multicast retransmission scheme based on instantly decodable network coding under imperfect feedback

Lian WANG*, Chaohui ZHU, Hailian WU, Hao YIN   

  1. School of Computer Science and Technology, Chongqing University of Posts and Telecommunications, Chongqing 400065, China
  • Received:2020-11-20 Online:2021-11-24 Published:2021-11-30
  • Contact: Lian WANG

Abstract:

In order to further reduce the transmission delay in wireless multicast networks with imperfect feedback, a delay minimization retransmission scheme based on instantly decodable network coding under imperfect feedback is proposed. The receiving state of each receiver and packet loss rate of transmission link are considered comprehensively. The priority sending set is constructed. And the belief state of each receiver in the priority sending set is calculated according to the partially observable Markov decision process. At the same time, the coding packet generation algorithm is optimized to simplify the network coding graph model to generate retransmission coding packet quickly. Simulation results show that the proposed scheme can effectively reduce the decoding delay and the completion delay compared with the traditional schemes, especially in the case of large numbers of receivers and packets.

Key words: imperfect feedback, instantly decodable network coding, retransmission, delay

CLC Number: 

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