QoS guarantees and performance analysis in mobile wireless ATM networks

Current research in wireless ATM networks focuses on its design, its protocol stack, data link layers, and issues related to mobility management functions but QoS guarantees during handoff has received limited attention. We present a new framework in this paper to allocate resources to both new calls and handoff calls based on the resource availability at the intermediate nodes also. The criterion for determining a route for a call is based on a combination of the resource availability at the links and the QoS requirements. We propose an algorithm that assigns the resources to the links proportional to the resource availability so as to reduce congestion on the heavily used links, and thereby reducing the chance of call failure and handoff failure. Another contribution in this paper is the performance analysis of wireless ATM network. The effects of different mobility parameters, blocking probability and handoff failure are examined for homogeneous traffic condition. We also present results about delay under heterogeneous traffic conditions.