Bandwidth estimation for wireless video transmission

This work deals with layered video transmission over wireless networks. We focus on deriving the required bandwidth provisioning for each layered video given their respective QoS target. We model the layered video traffic by a discrete time batch Markovian arrival process (DBMAP) with marked transitions. We assume the link level behavior of the wireless channel can be modeled by a hidden Markov model (HMM), and the network supports automatic repeat request (ARQ) operation. We show that the video data transmission buffer can be modeled as a G/D/c queue with time dependent feedback, and propose to approximate the ARQ feedback traffic by an HMM modulated DBMAP process. Based on the effective bandwidth approach, we derive the required channel capacity for both the input video traffic and the ARQ feedback traffic in order to meet the given QoS targets.