Rate control for ABR service in wireless ATM networks

This paper proposes a rate control scheme with a binary feedback mechanism for available bit rate (ABR) services in an interconnected wireless/wired asynchronous transfer mode (ATM) network. The rate control system model consists of a single bottleneck node, multiple mobile/fixed traffic sources and a binary feedback scheme. The rate of the mobile ABR source is determined based on the binary feedback that is received from the bottleneck node, as well as on the quality of the wireless link between the mobile source and the base station. A mathematical model for the rate control scheme which takes into consideration the user mobility, wireless channel quality and propagation delays is developed. Markov modulated fluid modeling is used to characterize the stochastic nature of the mobile/fixed sources. We have shown that the system consisting of the multiple mobile/fixed traffic sources, binary feedback scheme, and the bottleneck node server can be modeled using a Markov process. We have derived a set of first-order linear differential equations and appropriate boundary conditions for the stationary distribution of the state process which describes the overall rate control system.