A study of methods for protecting an SCP from overload

This paper deals with overload control algorithms that should see to that throughput in an service control points (SCP) is kept high, also under severe overload conditions. A couple of basic overload control schemes like random admittance, call gapping and window flow control are examined. We stress that the algorithms should both be efficient and show fairness among a number of SSPs logically connected to the SCP over Signalling System Number 7. Without a proper exchange of load information between the SSPs and the SCP only efficiency can be achieved. To have fairness among the SSPs this exchange of information is necessary