Quality of service analysis of access scheme of multimedia traffic in HSDPA channel using stochastic reward Nets

Abstract

High Speed Downlink Packet Access (HSDPA) is being increasingly deployed to enhance UMTS Radio Access Networks. Scheduling of Node B (base station) buffered user data for transmission over a shared radio channel is a key HSDPA functionality which enables queue management techniques to be utilized to improve Quality of Service (QoS) for mixed 'multimedia' services. Thus, we have previously studied a control access scheme of multimedia stream in HSDPA channel using stochastic analytic (SA) approach. In this paper, we use stochastic reward Nets (SRN) approach to derive QoS metrics of access control scheme in HSDPA channel. By comparing with stochastic analytic approach, we show that both approaches are scalable, tractable and give the same results. Obtained results show the impact of workload aspects (e.g., arrival rate and service rate) and system capacity on two performance measures: mean response delay and job blocking probability.