Patent ID: 7660242

Claim:
A call admission control method in a node of an Internet Protocol (IP) Differentiated Services (DiffServ) network for controlling admission of a traffic mix relating to a number of different traffic classes of which at least one is a real-time traffic class, comprising the steps of: determining whether a descriptor of a traffic class has changed; invoking an initialization phase if said descriptor of a traffic class has changed, said initialization phase comprising computing coefficients of approximating hyperplanes of delay constraints of at least one traffic class; storing the coefficients of said approximating hyperplanes; and, performing a real-time phase comprising the steps of: determining whether a stability constraint is fulfilled; determining whether a delay constraint is fulfilled; admitting a traffic mix if, for each real-time traffic class, both the stability and the delay constraints are fulfilled; and, rejecting a traffic mix if, for each real-time traffic class, either the stability or the delay constraints are not fulfilled.