Abstract
In this paper, the subcarrier and power allocation for video multicast services in wireless OFDMA systems is considered. To overcome the multicast capacity loss caused by the conventional multicast scheme where the rate of a subcarrier is determined by the worst channel user, the fine granularity scalability (FGS) video coding is exploited in the multicast system. The FGS decomposes the video contents into a base layer and an enhancement layer, and the enhancement layer streaming only has to be transmitted to part of the multicast users based on their channel conditions. The corresponding subcarrier and power allocation problem is formulated as a mixed binary integer programming problem. The goal is to maximize the system total throughput while satisfying the total power constraint and the minimum base layer transmission rate requirement constraints. Then we develop an asymptotically optimal resource allocation scheme based on the dual decomposition method to solve the resource allocation problem. Simulation results show that the algorithm we proposed can significantly improve the network's multicast capacity compare with the available suboptimal schemes.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
