Contact-Based Adaptive Granularity for Scalable Video Transmission in Opportunistic Networks
Résumé
Video transmission is a very challenging task in
opportunistic networks, due to their coarse characteristics of frequent
disruptions and uncertain data delivery. In a previous work
[1], we presented promising results of scalable video transmission
in opportunistic networks. Users’ viewing experience was taken
into account, by the means of playout delay and perceived quality.
However, there was still a space for the results to be bettered, and
we suggested to change the transmission unit from SVC layers
to their composing NAL parts. In this paper, after reviewing the
last work and results, we implement the new idea, outline its
pros and cons and propose a new integrated solution. The new
proposal is a network density aware packetization technique,
which dynamically reforms the transmission units into larger
chunks with a higher probability of successful delivery. Both
proposals are experimentally evaluated using the opportunistic
networks environment simulator