Wireless networks are increasingly used to carry applications with QoS constraints. Two problems arise when dealing with traf\ufb01c with QoS constraints. One is admission control, which consists of determining whether it is possible to ful\ufb01ll the demands of a set of clients. The other is \ufb01nding an optimal scheduling policy to meet the demands of all clients. In this paper, we propose a framework for jointly addressing three QoS criteria: delay, delivery ratio, and channel reliability.