Performance evaluation of a generalized hybrid TDMA/CDMA protocol for wireless multimedia with QoS adaptations

Our proposed analytical model allows us to understand how the end-to-end QoS guarantee can be obtained by analyzing the QoS requirements at every stage of the message delivery, from arrival to contention and transmission. In our studies, we have investigated several priority queuing disciplines: First In First Out, priority, and weighted fair queueing schemes, and we have investigated how customer impatience and system timeouts can affect the QoS provided by these priority scheduling schemes. Finally, we have applied the stretch-optimal algorithm in our protocol to improve further the high quality of QoS the mobile users may obtain.