Differentiated Data Transmission Based on Instantly Decodable Network Coding

Abstract

In order to solve the problem of the differentiated data transmission caused by different terminal processing capabilities, we propose a method to transmit differentiated data based on the improved IDNC (instantly decodable network coding). The scheme divides data into layers according to the quality and gives a high priority to the basic layer at retransmission to ensure low delay for low-processing capability terminals. Then a heuristic largest clique algorithm maximum weight clique (MWC) is proposed to adapt to this retransmission process. Simulation results show that the method can indeed realize the differentiated transmission of data. Furthermore, the proposed MWC algorithm can significantly reduce retransmission times compared to the traditional retransmission method without IDNC.