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This course presents the overall architecture of UMTS Charging Management before specifically examining certain aspects in some detail, namely the operation and provisioning of charging rules over the Gx interface. The definition of the Gx reference point has changed between Release 6 and Release 7 of the 3GPP specifications and this area of evolution is included. The Rx interface, used to exchange Flow Based Charging control information between the Charging Rules Function (CRF) and the Application Function (AF), is overviewed, as is the Diameter protocol.
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