  Analysis of an M2/M2/1/R, N queuing model for the multimedia transmission
over HSDPA/3.5G downlink is presented. The queue models the downlink buffer
with source multimedia traffic streams comprising two classes of flows:
realtime and non real-time. Time priority is accorded to the real-time flows
while the non real-time flows are given buffer space priority. An analytic
evaluation of the impact of varying the buffer partition threshold on the QoS
performance of both classes of customers is undertaken. The results are
validated with a discrete event simulation model developed in C language.
Finally, a cost function for the joint optimization of the traffic QoS
parameters is derived.
