Title:
Cross-Layer Modeling of Adaptive Wireless Links  
for QoS Support in Multimedia Networks

Abstract
Future wireless multimedia networks require diverse
quality-of-service (QoS) support. To this end, 
it is essential to quantify QoS metrics of wireless links
for system design and analysis.
We developed a cross-layer model of adaptive wireless 
links with QoS support, where adaptive modulation and 
coding (AMC) scheme is adopted at the physical layer 
and queuing dynamics of finite-length buffer are 
considered at the data link layer. 
This QoS-oriented wireless link model accounts for typical
wireless link parameters across the hardware-radio layer,
the physical layer and the data link layer. 
Its applications to design and analysis of power control, 
TCP and UDP in wireless networks are illustrated by examples.