Abstract: A method and a system for planning a cellular radio network. The method includes creation of a model representing the cellular radio network and its radio environment on a digital map. The method further includes adding system properties affecting the traffic control process of the cellular radio network to the model representing the cellular radio network and its radio environment for route specific operational simulation of the cellular radio network. The simulation preferably utilizes subscriber mobility models and immobile and/or mobile individual subscribers generated on the digital map. The simulation events are stored separately for each street, location, network element and/or cause. The optimization of the parameters of the cellular network is performed on the basis of the stored information. Simulation of an operating cellular network on the basis of statistical data obtained from the network allows an adaptive control of the system parameters.