Editing Carrier-sense multiple access (section)

===O-persistent===
Each node is assigned a transmission order by a supervisory node. When the transmission medium goes idle, nodes wait for their time slot in accordance with their assigned transmission order. The node assigned to transmit first transmits immediately. The node assigned to transmit second waits one time slot (but by that time the first node has already started transmitting). Nodes monitor the medium for transmissions from other nodes and update their assigned order with each detected transmission (i.e. they move one position closer to the front of the queue).<ref>{{Cite patent|country=US|number=5761431|pubdate=1998-06-02|title=Order persistent timer for controlling events at multiple processing stations|assign1=Peak Audio Inc.|inventor1-last=Gross|inventor1-first=Kevin Paul|inventor2-last=Anderson|inventor2-first=Charles William|inventor3-last=Lieb|inventor3-first=Derek Wearin}}</ref> O-persistent CSMA is used by [[CobraNet]], [[LonWorks]] and the [[controller area network]].