1. A method comprising: determining a first stream medium utilization associated with a first packet stream generated by a first communication device; determining a second stream medium utilization associated with a second packet stream generated by a second communication device, wherein the first packet stream and the second packet stream share a first communication medium; determining that the first packet stream and the second packet stream are in a first priority class; determining a ranking for each of the first communication device and the second communication device based, at least in part, on the first stream medium utilization and the second stream medium utilization; determining a first total medium utilization for a first interface of the first communication device, wherein the first interface is coupled with the first communication medium; determining that the first total medium utilization exceeds a medium utilization threshold; and determining a back-off time interval for the first communication device based, at least in part, on the ranking.