Contact-Based Adaptive Granularity for Scalable Video Transmission in Opportunistic Networks

International audienceVideo transmission is a very challenging task inopportunistic networks, due to their coarse characteristics of frequentdisruptions and uncertain data delivery. In a previous work[1], we presented promising results of scalable video transmissionin opportunistic networks. Users’ viewing experience was takeninto account, by the means of playout delay and perceived quality.However, there was still a space for the results to be bettered, andwe suggested to change the transmission unit from SVC layersto their composing NAL parts. In this paper, after reviewing thelast work and results, we implement the new idea, outline itspros and cons and propose a new integrated solution. The newproposal is a network density aware packetization technique,which dynamically reforms the transmission units into largerchunks with a higher probability of successful delivery. Bothproposals are experimentally evaluated using the opportunisticnetworks environment simulato