SYSTEM AND METHOD OF PROVIDING A REQUIRED QUALITY OF SERVICE (QOS) LEVEL FOR A MOBILE-ORIGINATED CALL ROUTED THROUGH A PACKET-SWITCHED NETWORK

摘要

A system and method of providing a required quality of sercice (QOS) level fora call that is originated in a mobile radio telecommunications network and isrouted through a Voice-Over-Internet-Protocol (VOIP) network(3). Signalingconnections are established between a mobile switching center (MSC) (4) in themobile network and at least one VOIP gateway (6). The MSC sends an InitialAddress Message (IAM) (11) to the VOIP gateway and includes a new QOS Requiredparameter (12). The gateway confers with a gate keeper (8) in the VOIP networkto determine whether the required QOS can be provided. If the required QOS canbe provided, an indication that the required QOS can be provided is sent fromthe packet-switched network to the mobile network. If the required QOS cannotbe provided, an indication (16) that the required QOS cannot be provided issent from the packet-switched network to the mobile network.