Patent ID: 6873688

Claim:
A method for making a questionnaire-based survey in a cellular radio system comprising the steps of: (a) providing a central device and a number of independent wireless terminal devices operable in the cellular radio system, where data transmission connections for transmitting data transmission packets are made between the wireless terminal devices and the central device, wherein the method comprises the steps of: (b) allowing the central device to receive an inquiry message and/or an inquiry table from the wireless terminal device of the researcher, said message defining the target survey group of the inquiry message, (c) causing the central device to investigate which predetermined wireless terminal device group and/or inquiry table stored in the central device is the target of the received inquiry message, (d) transmitting a notice of a new received inquiry message or at least part of the received inquiry messages and/or the questionnaire from the central device to the wireless terminal devices that belong to the target group of the received inquiry message, (e) allowing the central device to receive a questionnaire request from at least part of such wireless terminal devices that received the message but did not receive the questionnaire, and to transmit the questionnaire information to those wireless terminal devices that requested it, (e) allowing the central device to receive an answer message corresponding to the questionnaire from at least part of the wireless terminal devices that received the questionnaire, and to transmit at least part of the contents of the received answer messages to the wireless terminal device of the researcher.