Layered Wireless Video Multicast Using Relays

Wireless video multicast enables delivery of popular events to many mobile users in a bandwidth efficient manner. However, providing good and stable video quality to a large number of users with varying channel conditions remains elusive. In this paper, an integration of layered video coding, packet level forward error correction, and two-hop relaying is proposed to enable efficient and robust video multicast in infrastructure-based wireless networks. First, transmission with conventional omnidirectional antennas is considered where relays have to transmit in non-overlapping time slots in order to avoid collision. In order to improve system efficiency, we next investigate a system in which relays transmit simultaneously using directional antennas. In both systems, we consider a non-layered configuration, where the relays forward all received video packets and all users receive the same video quality, as well as a layered setup, where the relays forward only the base-layer video. For ea...

• Type: Journal
• Year: 2010
• Where: TCSV
• Authors: Özgü Alay, Thanasis Korakis, Yao Wang, Elza Erkip, Shivendra S. Panwar
• Keywords: Computational Biology, Relay, TCSV 2010, Video, Video Quality