MAI-JSQ: A Cross-Layer Design for Real-Time Video Streaming in Wireless Networks

Abstract

We propose a cross--layer design for the real--time streaming of prerecorded video with prefetching to clients in wireless CDMA networks. Our design exploits the recently discovered temporal correlation structure of the multiple access interference (MAI) which enables accurate prediction of the MAI levels. Based on the MAI prediction, we optimize the transmissions of the video traffic so as to make judicious use of the radio resources and therefore to achieve small video playback starvation probabilities. A key component of our transmission control is the Join--the--Shortest--Queue (JSQ) scheduling, which selects the client with the smallest prefetched reserve for transmission (provided that the client's predicted MAI is low). Our simulation results indicate that in typical scenarios, the starvation probabilities using our cross--layer design with the MAI prediction, are at least one order of magnitude smaller than of the conventional JSQ protocol with link probing at the link/MAC layer