| 摘要 |
<p>A paging network having a master transmitter (MT) and several local radio transmitters (1 - 3) is shown. The network is designed to allow the transmission of local and global messages. Global messages must be sent by all radio transmitters (1 - 3) synchronously. Local messages are only sent by a single radio transmitter. The master transmitter (MT) generates a signal that contains the global messages and sends it to the radio transmitters (1 - 3). If a radio transmitter has no local messages to be sent, it emits the unchanged signal received from the master transmitter. If a radio transmitter has one or more local messages to be added to the signal, it will determine if there are suitable gaps in the signal received from the master transmitter where the local messages can be included. If such gaps are found, the local messages are added to the signal to generate a modified signal which is then emitted by the radio transmitter. In order to allow a forward recognition of gaps in the signal sent by the master transmitter, special gap markers or allocation messages can be added. The proposed method allows to make an optimum use of the capacity of the available radio channel. <IMAGE></p> |
