Like a time-out timer (TOT) on radios?

> When activated, the Time-out Timer starts counting the moment a user begins transmitting. If the transmission continues beyond a pre-set duration, the timer automatically cuts off the transmission. This mechanism compels users to be concise in their communication and relinquish the channel, allowing others the opportunity to transmit.

— https://talkpod.com/blogs/two-way-radio-wiki/what-is-time-ou...

Edit: No, it's more like a scheduled lockout. You can only talk when it's your turn. And the assumption is that the clocks on each node are synced:

> Every node has a notion of the global time and uses this notion along with the static schedule to establish when it should send messages.