Telefonaktiebolaget Lm Ericsson (Publ)

Daniel Krupp

Áron Szentesi

Ian Broadhurst

Istvan M Szabo

István Szabó

A Call Server in a network is able to monitor an offered rate of incoming calls per Access Gateway (AGW). A calculated GlobalLeakRate can be distributed between the AGWs in proportion to the traffic rate they offer. A leak rate calculation method is used to calculate the GlobalLeakRate control parameter of the ETSI NR restrictor at an overloaded Control Server The leak rate calculation is based on the POTS call rejection rate. In one particular embodiment of the present invention, the calculation is based on bringing the call reject rate close to a configurable low target reject level. An MGC is able to identify the end of an overload event with a greater degree of confidence and an AGW is able respond appropriately if the AGW is prematurely instructed to stop the control.

System and method for overload control in a next generation network

A Call Server in a network is able to monitor an offered rate of incoming calls per Access Gateway (AGW). A calculated GlobalLeakRate can be distributed between the AGWs in proportion to the traffic rate they offer. A leak rate calculation method is used to calculate the GlobalLeakRate control parameter of the ETSI_NR restrictor at an overloaded Control Server The leak rate calculation is based on the POTS call rejection rate. In one particular embodiment of the present invention, the calculation is based on bringing the call reject rate close to a configurable low target reject level. An MGC is able to identify the end of an overload event with a greater degree of confidence and an AGW is able respond appropriately if the AGW is prematurely instructed to stop the control.

A gateway apparatus for interfacing an access networkto a service network, the apparatus comprising an input for receiving access requests from the access network at a first flow rate, an output for forwarding access requests to a gateway controller at a second flow rate, and a flow controller for controlling the flow of access requests from said input to said output. The flow controller comprises a receiver for receiving a restrict ion value from the gateway controller, first processing means for determining whether the received restriction value is more restrictive than any currently in use restriction value and, if so, for determining a leak rate on the basis of the received restriction value and the current second flow rate, and second processing means for allowing access requests to pass to said output at a rate up to the determined leak rate at least until a further restriction value is received.

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Budapest, Hungary

Daniel Krupp