Effective video multicast using svc with heterogeneous user demands over tdma based wireless mesh networks

1. Effective Video Multicast using SVC with Heterogeneous User Demands over
TDMA Based Wireless Mesh Networks
We provide an effective video multicast framework over TDMA based wireless mesh networks.
Heterogeneous user demand is considered where each multicast receiver has its own video
quality demand. In video multicasting, different relay nodes in the same multicast tree may have
different transmission rates by utilizing scalable video coding. Considering this distinguishing
characteristic of video multicasting, the proposed multicast framework provides effective
multicast routing, scheduling, and rate allocation algorithms. The purpose of the multicast
routing and scheduling is to obtain a minimum length schedule which satisfies given quality
demands of receivers. If the schedule is not feasible even with its minimum length due to the
limited number of time slots in the network, rate allocation algorithm adjusts the transmission
rates of relay nodes to generate a feasible schedule. The algorithm is designed to maximize the
minimum utility of multicast receivers. Simulation results show that the proposed multicast
routing and scheduling algorithms outperform existing schemes in terms of schedule length. The
minimum utility is improved up to 30% by the proposed rate allocation algorithm compared to
the existing method.
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