System Architecture and Cross-Layer Optimization of Video Broadcast over WiMAX
IEEE Journal on Selected Areas in Communications
Unicast versus multicast for live TV delivery in networks with tree topology
WWIC'10 Proceedings of the 8th international conference on Wired/Wireless Internet Communications
Review: Power-saving mechanisms for energy efficient IEEE 802.16e/m
Journal of Network and Computer Applications
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WiMAX technology is a good candidate to provide broadcast TV services for mobile users because it supports QoS based multicasting functionality. To provide multicast-based TV services over the mobile WiMAX network, a multicast session setup involves both MAC-layer and IP-layer multicast management. However, in mobile environment, IP-layer multicast management entails service interruption due to unreliable wireless transmission, and disrupts mobile terminal's power-saving mode. In this paper, we propose a cross-layer multicast service management scheme that can not only avoid the service interruption and power-saving mode disruption but also reduce the bandwidth consumption for IP-layer multicast signaling. Simulation results demonstrate that the scheme can eliminate the unnecessary power consumption caused by IP-layer multicast signaling, and improve the wireless uplink throughput as well. We also study, by simulation, the influence of the multicast management signaling procedures on channel switching time that is a major performance indication for mobile TV services.