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The article discusses simulation of wireless network systems. Simulation is a general term that is used in many disciplines including performance evaluation of computer and telecommunications systems. A model is a description of a system by symbolic language or theory to be seen as a system with which the world of objects can be expressed. The article also reviews the main characteristics of the commonly used stochastic distributions used for the simulation of wireless networks. The article concludes with cases studies on the simulation of some wireless network systems.

The article presents information on wireless communications. The field of mobile wireless communications is currently one of the fastest growing segments of the telecommunications industry. Wireless devices have nowadays found extensive use and have become an indispensable tool on the everyday life of many people. both the professionally and personally. To gain insight into the momentum of the growth of the wireless industry, it is sufficient to state the tremendous growth in the number of worldwide subscribers of wireless systems. This figure has risen from only one mobile subscriber per 100 inhabitants worldwide in 1990 to 26 subscribers per 100 inhabitants in 1999 and the growth continues. This increasing number of subscribers is obviously reflected in monetary terms as well.

The article focuses on fixed wireless access systems. The goal of this chapter is to review the main techniques used for Wireless Local Loop (WLL) including the Multichannel Multipoint Distribution Service, and the Local Multipoint Distribution Service. It is expected that the global WLL market will exceed 202 million subscribers by the year 2005. Much of this growth will be in the developing countries where over half the world's population lacks Plain Old Telephone Service. WLL systems have a number of advantages over wired systems to subscriber local loop support.