GloMoSim: a library for parallel simulation of large-scale wireless networks
PADS '98 Proceedings of the twelfth workshop on Parallel and distributed simulation
Practical network coding for scalable video in error prone networks
PCS'09 Proceedings of the 27th conference on Picture Coding Symposium
Network coding for multi-resolution multicast
INFOCOM'10 Proceedings of the 29th conference on Information communications
Efficient Online WiFi Delivery of Layered-Coding Media Using Inter-layer Network Coding
ICDCS '11 Proceedings of the 2011 31st International Conference on Distributed Computing Systems
Universal multiresolution source codes
IEEE Transactions on Information Theory
Multicasting MDC videos to receivers with different screen resolution
ACM SIGMETRICS Performance Evaluation Review
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A primary challenge in multicasting video in a wireless LAN is to deal with the client diversity -- clients may have different channel characteristics and hence receive different numbers of transmissions from the AP. A promising approach to overcome this problem is to combine scalable video coding techniques such as MRC or MDC, which divide a video stream into multiple substreams, with inter-layer network coding. The fundamental challenge in such an approach is to determine the strategy of coding the packets across different layers that maximizes the number of decoded layers at all clients. In [7], the authors showed that inter-layer NC indeed helps the delivery of MRC coded media over the WiFi, and proposed how to efficiently search for the optimal coding strategies online. In this paper, we study (1) how NC can help with WiFi delivery of MDC media, and (2) in particular, due to the different decoding requirements of MDC from MRC, whether WiFi delivery of MDC media can benefit more from NC compared to that of MRC media. Our simulation results are somewhat surprising. Even though MDC is generally shown to outperform MRC in lossy channels, most of the benefit of MDC over MRC is lost after applying NC to both schemes.