Optimal Design of Unequal-Protected Rateless Codes for Layered Streaming
With With the explosive growth of multimedia broadcasting applications in recent years, the demand for layered streaming has increased significantly. In order to meet the quality of service requirements, unequal error protection technique has been considered. In this paper, we propose an opportunistic fountain scheme for layered streaming using rateless codes. The proposed scheme provides unequal error protection property by scheduling strategy, decoupled from rateless code structure. To find the optimal scheduling strategy two optimization models are developed, which maximizes the user satisfaction degree subject to overhead and minimizes the overhead subject to some fixed user satisfaction degree respectively. Simulation results show that with the optimal design of the opportunistic fountain scheme, user satisfaction degree is improved by 10% similar to 15% compared to EEP scheme.
rateless codes multimedia broadcasting unequal error protection opportunistic fountain