| 摘要 |
<p>A method is described which provides functionality allowing mobile stations (8) of users having certain access rights to display messages broadcast on a common channel of a cell in a cellular telecommunications network in intelligible form. The messages, before broadcast, are encrypted using a predefined encryption key, and the mobile stations (8) having a corresponding access right are provisioned with the corresponding decryption key. Mobile stations lacking the appropriate access right are able to display a message, when received and picked up, only in encrypted, i.e. unintelligible, form. Some types of message broadcast within the cell on the same common channel are deemed general access messages, which are broadcast in unencrypted form and may be displayed in intelligible form by any mobile station (8) camped on to the cell in which the message is broadcast.</p> |
