Abstract
Uncoded linear video transmission has recently gained much attention. However, the received quality may not be good enough due to the channel fluctuation. In this paper, we propose a framework, named MCast, to exploit the time and frequency diversities by transmitting the data multiple times for better reconstruction. The key problem in MCast is how to assign channels and allocate power for the data blocks. We derive a close-form optimal power allocation solution for any given channel assignment. Then we propose a suboptimal channel assignment scheme, where we sort the channels with their powers and assign the channels one-by-one to the blocks that can reduce the most reconstruction error. Finally, simulations show that MCast can achieve better performance compared with existing methods.
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