| 摘要 |
<p>The system comprises a number of stations (101-109) interconnected (111-119) for the communication of control messages which are multiplexed with digital audio signals. The control channel is divided into eight parallel channels (ChO-Ch7), and each station is allocated one channel to transmit on, while it receives from other stations on the other seven channels. Messages on each channel are segmented into finite message units. When a longer message is to be transmitted, the receiving station implement a locking mechanism such that message units will not be accepted on other channels until all message units of the message have been received. To allow the number of stations to exceed the number of data channels, some of the stations are designated "slave only", and share a single channel for the transmission of control messages. To avoid conflicts, these stations are permitted to transmit only in response to request messages from a station having its own exclusive transmit channel. <IMAGE></p> |
