QoS framework for wireless IP networks

This paper proposes a novel programmable framework for QoS support in wireless IP networks. The framework is based on classification of IP traffic into two main classes, A and B, where class-A is further divided into three subclasses. It consists of three main modules: packet classifier, scheduler and admission control module. Packets are classified at network nodes by using differentiated services. Different classes are serviced using priorities. The scheduling is adaptive. For a real time flow, such as CBR and VBR, it adapts to location-dependent bit-errors in the wireless channel by increasing bandwidth share of the affected flow until it reaches its effective throughput. Admission control module is made programmable, providing possibility to reserve part of the bandwidth for lower priority classes to avoid monopolization of the wireless link by higher priority classes.