Evolved Packet Core - Policy and Charging Rules Function (PCRF)

 NextEPC is a C-language Open Source implementation of the 3GPP Evolved
 Packet Core, i.e. the core network of an LTE network.
 .
 This package contains the PCRF (Policy and Charging Rules Function),
 which controls the service quality (QoS) of individual connections and
 how to account/charge related traffic. It implements the Gx interface
 towards the PGW using the DIAMETER protocol.