name: PCEF
full_form: Policy and Charging Enforcement Function
context: Firewalls are a specific embodiment of a Policy and Charging Enforcement Function (PCEF) but other embodiments exist, such as HTTP proxies or DPI-aware PCEF distinct from firewalls. While the general case of bypassing the firewall and policy enforcement may be thought of benefit to an IMS service provider, it may be at the expense of the firewall operator (whether residential, enterprise, terrestrial or broadband access provider including mobile Internet or IP network access, and/or transport provider) who may wish to install firewalls, proxies, or other PCEF to enforce its policies. The following may be needs in addition to firewall traversal: Consideration for IMS traffic to pass through PCEF other that firewalls; Consideration for IMS traffic to pass through HTTP proxies; Consideration of the policy enforcement and policy discrimination needs of the firewall operator; Consideration for premises based policy enforcement and discrimination as well as network-based policy enforcement
description: The Policy and Charging Enforcement Function (PCEF) is a network component responsible for enforcing policies and charging rules within the network. It can take various forms, including firewalls, HTTP proxies, or Deep Packet Inspection (DPI)-aware PCEFs, to control and manage traffic flow based on predefined policies.
explanation: The context explicitly describes PCEF as a function that enforces policies and charging rules, which aligns with the definition of a Network Function. The mention of different embodiments, such as firewalls and HTTP proxies, further supports this classification.
section_title: 4.7	Premises/network policy enforcement
biotag_Context: O,O,O,O,O,O,O,B-Network Function,I-Network Function,I-Network Function,I-Network Function,I-Network Function,O,O,O,O,O,O,O,B-Protocol,O,O,O,B-Network Function,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,B-Network,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,B-Protocol,O,O,O,O,O,O,O,O,O,O,O,O,O,O,B-Network Function,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,B-Network,O,O,O,O,B-Network Function,O,O,O,O,O,B-Network,O,O,O,O,B-Protocol,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O
biotag_Description: O,B-Network Function,I-Network Function,I-Network Function,I-Network Function,I-Network Function,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,B-Protocol,O,O,B-Technology,I-Technology,I-Technology,O,O,O,O,O,O,O,O,O,O,O,O