Statistical QoS Provisionings for Wireless Unicast/Multicast of Layered Video Streams

Q. Du, X. Zhang
2009 IEEE INFOCOM 2009 - The 28th Conference on Computer Communications  
Due to the highly-varying wireless channels, deterministic quality of service (QoS) is usually difficult to guarantee for real-time multi-layer video transmissions in wireless networks. Consequently, statistical QoS guarantees have become an important alternative in supporting real-time video transmissions. In this paper, we propose an efficient framework to model the statistical delay QoS guarantees, in terms of QoS exponent, effective bandwidth/capacity, and delay-bound violation probability,
more » ... for multi-layer video transmission over wireless fading channels. In particular, a separate queue is maintained for each video layer, and the same delay bound and corresponding violation probability threshold are set up for all layers. Applying the effective bandwidth/capacity analyses on the incoming video stream, we obtain a set of QoS exponents for all video layers to effectively characterize this delay QoS requirement. We then develop a set of optimal adaptive transmission schemes to minimize the resource consumption while fulfilling the diverse QoS requirements under various scenarios, including video unicast/multicast with and/or without loss tolerance. Simulation results are also presented to demonstrate the impact of statistical QoS provisionings on resource allocations of our proposed adaptive transmission schemes. Index Terms-Mobile multicast, wireless networks, rate control, layered video coding, statistical QoS guarantees. Time-slot allocation and rate adaptation across video layers Incoming layered video stream A1[k] A2[k] AL[k] Video layer 1: Queue 1 Arrival processes Queue 2 Queue L
doi:10.1109/infcom.2009.5061953 dblp:conf/infocom/DuZ09 fatcat:vtqwfrh6vzb6jcbg74iiiuo7wi