| 摘要 |
A communication system, network, interface, and port architecture are provided for transporting of data across a ring network. A network node operating as timing master generates frames having a preamble, a data field and a time count field, which represents time information. This time information may comprise counted time units like seconds or transmitted network frames. As the individual bits of a network frame are generated and sent on the network, they pass other network nodes and are forwarded through the ring bus to the timing master which is receiving parts of the frame it is still generating. This ensures a close control of the frame. In the frame, the received time count field is compared with the transmitted time count field. If both fields are identical, there is no other timing master on the bus. If there is another timing master on the bus, it would overwrite the contents of the time count field and therefore the received time count field would not be equal to the transmitted time count field. |
