Comparison of congestion control mechanisms for IN signalling systems

The evolution of increasingly complex telecommunication services, has fuelled in the last years the development of new network architectures. There is a growing interest on the evolution of the intelligent network and of the B-ISDN. The integration of the signalling systems of these two architectures will allow, in a medium term scenario, the support sophisticated services. The provision of these services will entail, on the other hand, an increase of the signalling load on the network and in particular on the service control point, the network element which contains the intelligence to control the service provision. It is therefore necessary to introduce some congestion control mechanism in order to protect such node from overload situations. A performance study relevant to two congestion control mechanisms is presented. The study has been carried out by means of simulation; moreover, theoretical upper bounds for the throughput performance of the two mechanisms have been calculated