A method for providing a network service to a plurality of mobile terminals inside a service area. The mobile terminals are arranged to communicate with a cellular communication network and the service area is a part of a geographical area that is covered by the cellular communication network. The method includes defining a grid with grid lines, where the grid covers the service area with one or more tiles framed by the grid lines. A determination is made whether there is at least one split tile that results from splitting the one or more tiles along closer grid lines and that does not overlap with the service area. The one or more tiles are split along the closer grid lines based on the determining, and the network service is provided in the split tiles that cover the service area.