PCEF – Policy and Charging Enforcement Function
The PCEF is a DPI (Deep Packet Inspection) device responsible for the enforcement of rules which have been configured statically or supplied to the PCEF dynamically from the PCRF (Policy and Charging Rules Function). The PCEF sits on the user plane, ensure that subscriber traffic flows are treated in accordance with network policy e.g. implementing QoS, throttling traffic, blocking traffic, etc. Crucially, the PCEF will ensure that services are billed accordingly.
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