METHOD FOR DETECTION OF ACCESSABILITY OF A GROUP OF TERMINALS LOCATED WITHIN A DEFINED AREA

摘要

The invention concerns detection of accessibility of a group terminals in a mobile station system. The invention is especially related to detection of accessibility of a group of terminals located within a defined area of the mobile station system. According to the invention, the accessibility of a group of terminals is detected in such a way that a query message containing an identifier is first generated for a desired group of terminals. Then a target area is defined in the mobile station system and the query message is sent to the defined target area in such a way that it can be received by several terminals located within the said target area. In the receiving terminal the message is processed in order to conclude whether a reply message is to be sent from the terminal to the mobile station system. Thus, a check is made in practice to find out whether the terminal belongs to that group of terminals, whose accessibility is to be detected. The identifier included in the said query message is utilised in the conclusion. Finally, the accessibility of the desired terminals is detected based on the reply messages arrived in the system.