They can synchronize to create a green wave of uninterrupted motion. Isochronets accomplish similar uninterrupted motion by periodically configuring network switches to create end-end routes in the network. Frames flow along these enabled routes requiring no header processing at intermediate network switches. If no other traffic contends for the tree, it will move uninterrupted, as depicted by the straight time-line. The green band in maintained by switching nodes through timers synchronized to reflect latency along tree links.
Synchronization is per band size, which is large compared to frame transmission time.
It can thus be accomplished trough relatively simple mechanisms. Furthermore, synchronization errors can be easily accommodated. Routing along a green band is accomplished by configuring the switches to route frames on incoming tree links to the appropriate output tree links for the duration of the band. A source sends frames by scheduling transmission to the green bands of its destination. In similarity to circuit switch or burst switch networks, green bands allocate reserved network resources.