A general performance evaluation framework for network selection strategies in 3 g wlan interworking networks

1. A General Performance Evaluation Framework for Network Selection
Strategies in 3G-WLAN Interworking Networks
We investigate a general performance evaluation framework for network selection strategies
(NSSs) that are used in 3G-WLAN interworking networks. Instead of simulation, this framework
is based on models of NSSs and is constructed using a stochastic process algebra, named
Performance Evaluation Process Algebra (PEPA). It captures the traffic and mobility
characteristics of mobile nodes in 3G-WLAN interworking networks and has a good expression
of the behaviour of the mobile nodes using different NSSs. Commonly used NSSs are evaluated
from the perspectives of average throughput, handover rate, and network blocking probability.
Results of the evaluation explore the effect of these NSSs on both mobile nodes and networks, as
well as their characteristics in different mobility and traffic scenarios.
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