Metohod and arrangement in a communication system

摘要

A method and arrangement in a radio communication system for determining the presence of a mobile station in a determined area. A first radio channel is allocated for communication of control information and user data information between the mobile station and a first base station. The mobile station transmits identity information repeatedly on the first radio channel. A detecting unit receives at least one occurrence of the transmitted identity information. The mobile station is registered as present in the vicinity of the detecting unit upon receipt of said at least one occurrence of the identity information.