Modeling and optimization of heterogeneous wireless LAN

A sophisticated approach to automated prediction for the optimal layout and quantity of WLAN access points to achieve the desired network parameters is introduced. The algorithms were implemented in Web-based software for RF planning of a complete wireless local area system with multiple radio frequency technologies (IEEE 802.11a, 802.11b/g, and Bluetooth) based on a mesh topology. The implemented optimization method based on evolution strategies offers easy specification of various network aspects and QoS requirements (hotspots of various technologies, proffered areas near Ethernet ports and power outlets, throughput, number of concurrent users, etc.). The first few months of operation and usage in many real-world scenarios have shown good performance and appropriate accuracy. The application is also able to model site-specific coverage and the capacity of the wireless network using semi-empirical propagation models.