Control Loop for Traffic Management of Network under Focussed Overloads

Network Management is an indispensable part of any successful telecommunications network. It consists of real time surveillance and control of the network. This paper describes an effective dynamic control loop to ensure a stable and good Grade of Service in network under focussed overload. Aspects which have qualitative and quantitative influences on the declination of the network goodness will be first studied. It will be shown that network performance deterioration phenomena may be classified into some distinct congestion types, each of them may be dealed by appropriate control measures. The most important control is the call rate throttling mechanism. Two well known principles, the Gall Gapping and the Leaky Bucket principle, will be analysed and compared. The way how parameters of the used controls have to be dynamically calculated will be also one of the subject of the paper. Simulation results on a hierarchical 3-1evels network containing exchange with distributed control architecture should verify the effects of the dynamical control loop. 315