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Defined by the 3GPP, the IP multimedia subsystem (IMS) is an architectural framework that enables the delivery of multimedia services in mobile networks. Based on the session initiation protocol, the IMS offers unified billing, QoS negotiation mechanisms, and the possibility of combining services deployed in different environments like CAMEL and Parlay OSA. With the aim of determining the real limitations...
The IMS (IP multimedia subsystem) control infrastructure aims at integrating QoS management functionality into IP services networks. The present contribution explores the approach enforced by 3GPP standards in this respect and describes implementation results in realistic scenarios based on the DiffServ model.
The IP Multimedia Subsystem (IMS) is a converged service enabler that facilitates the rapid deployment of multimedia services in IP networks. The IMS defines a Policy Based Management model to ensure QoS-enabled connectivity by providing mediation and interaction between applications and transport layer resources. This paper reviews the current state of the art regarding the necessary mediation between...
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