Layered Video Multicast Considering Source-coding Characteristic in Broadband Wireless Networks

A layered video multicast scheme for broadband wireless networks is proposed. The multicast scheme works by combining layered video coding with Adaptive Modulation and Coding (AMC). The system utility is formulated into a function of user distribution, system resources, and corresponding Modulation and Coding Schemes (MCS). By allocating different resources inter-and intra-multicast groups through nonlinear integer programming and a fast greedy algorithm respectively, the system utility is maximized. The layered video coding structure is then modified according to resource allocation, so that the layered structure is compatible with available system resources and the channel conditions of different users. Simulation results show that this scheme optimizes the layered structure of video coding, takes full advantage of radio resources, and improves the system performance.