Computer Science ›› 2016, Vol. 43 ›› Issue (8): 50-54.doi: 10.11896/j.issn.1002-137X.2016.08.010

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Cross-layer Optimization Algorithm Based on Raptor Code for Video Multicast

QIAN Xiao-jie and WANG Chao   

  • Online:2018-12-01 Published:2018-12-01

Abstract: In the fourth generation mobile communication,people pay much more attention to quality of service(QoS) of mobile broadband network transmission in video multicast based on multiple-input-multiple-output(MIMO) system.Video multicast cross-layer optimization algorithm based on Raptor code was proposed.By analyzing packet error rate between Raptor code and other erasure code,and selecting the appropriate Raptor rate and modulation and coding scheme (MCS) model in order to optimize the combination,the throughput of the system can be increased and the channel resource (time slot) utilization can also be improved.Simulation shows the algorithm has better throughput at least 28%,and saves the channel resources at least 18%.In addition,when SNR is 11.5,PSNR performance gain of BUS sequence can reach more than 4dB.

Key words: MIMO,Video multicast,QoS,Raptor codes,Cross-layer optimization algorithm

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