This book quantifies the key factors of WLAN performance and describes methods for improvement. It provides theoretical background and empirical results for the optimum planning and deployment of indoor WLAN systems, explaining the fundamentals while supplying guidelines for design, modeling, and performance evaluation. It discusses environmental effects on WLAN systems, protocol redesign for routing and MAC, and traffic distribution, examines emerging and future network technologies, and includes radio propagation and site measurements, simulations for various network design scenarios, numerous illustrations, practical examples, and learning aids.