Scheduling performance of multimedia services over HSDPA

Abstract

This paper investigates the performance of multimedia services over HSDPA. A network level simulator has been used to analyse the end-to-end Quality of Service results for VoIP and Best Effort traffic. Three different scheduler algorithms have been considered, with a focus on a time-to-live scheduler that is expected to satisfy the delay constraints imposed by VoIP. On the other hand, the periodic character in the generation of VoIP packets in first hand fits best to the Round-Robin way of selecting the queues to be scheduled. This paper investigates this tradeoff, together with a scheduler that selects the user with the best channel condition. Moreover, several modifications in the use of discard timers are explored. All users are moving at vehicular speeds.