Heuristics for QoS maintenance: adaptive policies in differentiated services wireless networks

The fluctuation in resource availability demands for adaptive behavior in wireless environments. The problem is exacerbated by the differentiated services with different quality demands. We present the MATS+ scheme, an adaptive bandwidth allocation and admission control algorithm for mobile integrated services networks. This extends the recently proposed MATS scheme [11] to include non-real time classes and a per-class utilization control. We define an analytical model and performance metrics to evaluate the proposed scheme. The efficiency and flexibility of the analytical model allows conducting several experiments in a real word scenario by changing different system parameters. From the obtained results we define an interesting heuristics to initialize the scheme guaranteeing QoS requirements and to maintain the QoS while adapting to environment changing conditions.