Cooperative Layered Video Multicast Using Randomized Distributed Space Time Codes
With the increased popularity of mobile multimedia services, efficient and robust video multicast strategies are of critical importance. Cooperative communications has been shown to improve the robustness and the data rates for point-to-point transmission. In this paper, a two-hop cooperative transmission scheme for multicast in infrastructure-based networks is used, where multiple relays forward the data simultaneously using Randomized Distributed Space Time Codes (RDSTC). This randomized cooperative transmission is further integrated with layered video coding and packet level Forward Error Correction (FEC) to enable efficient and robust video multicast.