| 摘要 |
<p>A broadcast system for communicating single or multiple encrypted broadcast messages in a telecommunications system (1) is provided, where the telecommunications system has at least one fixed terminal (2) for communication with one or more portable terminals (6). The broadcast system includes means for transmitting first messages from the or each fixed terminal (2) for reception by portable terminals (6) in the reception area of that fixed terminal, the first message including information that specifies a channel, selected for that fixed terminal, which will be used to convey an associated broadcast message. A control means is provided for causing the or each portable terminal to receive on the specified broadcast message channels. The transmitter means then transmits from the fixed terminal (2) the encrypted broadcast messages on the said specified broadcast channels for reception, decryption and reproduction of a broadcast message, such as an audio broadcast message, by the or each portable terminal (6).</p> |
