Rate based call gapping with priorities and fairness between traffic classes

—This paper presents a new rate based call gapping method. The main advantage is that it provides maximal through-put, priority handling and fairness for traffic classes without queues, unlike Token Bucket which provides only the first two or Weighted Fair Queuing that uses queues. The Token Bucket is used for call gapping because it has good throughput characteristics. For this reason we present a mixture of the two methods keeping the good properties of both. A mathematical model has been developed to support our proposal. It defines the three requirements and proves theorems about if they are satisfied with the different call gapping mechanisms. Simulation, numerical results and statistical discussion are also presented to underpin the findings.