QoS provisioning performance of Differentiated Queueing Service with mobile wireless multimedia

Quality of Service (QoS) provisioning especially delay guarantee is particularly important to the increasing popularity of mobile wireless multimedia applications. Traditional QoS schemes include the per-flow Integrated Service (IntServ) and per-class Differentiated Service (DiffServ) as well as their variants. To overcome the scalability problem of IntServ and the coarse QoS granularity of DiffServ, the per-packet Differentiated Queueing Service (DQS) was proposed. This paper focuses on analytically modeling of the QoS provisioning performance of DQS for mobile wireless multimedia applications. In the analysis, arriving packets of a session are classified into different streams according to their delay requirements. Each stream is described by a modified Fractional Brownian Motion (FBM)based traffic model, where both the traffic self-similarity of multimedia streams and heavy-tailed distribution of packet sizes are considered. We develop a stochastic service capability model for mobile wireless links. Then a delay guarantee model for DQS is further developed by deriving the delay bound violation probability and packet loss rate. Computer simulations are conducted to validate the proposed analytical models.