Before revision:  These queues have independent Poisson arrivals, but are coupled through their service rateswhich is the signal to interference ratio of wireless network theory. More precisely, the service discipline is translation invariant and of the processor sharing type,with the service rate in each queue slowed down, when the neighboring queues have a larger workload.
After revision:  These queues have independent Poisson arrivals, but dependent service rates. The service discipline is translation invariant and of the processor sharing type,with the service rate in each queue slowed down, when the neighboring queues have a larger workload.