About the PCRF Test Application
The Policy and Charging Rules Function (PCRF) is used mainly for bearer level resource control mechanisms. It also supports passing of information for flow based charging policy. The bearer control is referred to as Service Based Bearer Control (SBBC).
The Tx interface connects the PCRF to an Application Function (such as P-CSCF) that is responsible for application level service decisions. The Ty interface connects the PCRF to the access gateway (such as PDSN) that is responsible for policy enforcement. The PCRF acts as a Policy Decision Point (PDP) from the perspective of policy control.
The Ty interface can be based on either RADIUS or Diameter. The Tx interface is Diameter based.
Protocols
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Diameter
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RADIUS
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SIP
Emulators
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Mobile Node (MN)
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Application Function (AF)
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Access Gateway (AGW)
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Bearer Binding and Event Reporting Function (BBERF)