Adding a go-ahead massage to indicate the complete transmission. If the polling station has no data transmit, it immediately sends a go-ahead massage back. Roll call Polling Operation by each station. After transmission, the token state is switched back to free. Token ring operation by each station.
All stations compete for a transmission channel in a random way.
When a station has data to send, it listens to the channel to see if anyone else is transmitting. If the channel is busy, the station waits until the channel becomes idle and then transmits. If the channel is idle, the station transmits its frame immediately. Propagation delay has a very important role to play. If there are two stations that wish to transmit, and the first station's signal has not yet propagated to the second station, there will be a collision.