5G • Core Network
Npcf Interface
PCF Service-Based Interface
RESTful service interface exposed by PCF delivering policy, QoS, charging, and slice rules to NFs.
Technical Explanation
Exposed over HTTP/2, Npcf includes Npcf_SMPolicyControl (session management policies for SMF), Npcf_AMPolicyControl (access and mobility rules for AMF), Npcf_PolicyAuthorization (authorizing QoS requests from AFs), and Npcf_BDTPolicyControl (background data transfer negotiation).
Key Functions
- Delivers unified QoS, charging, and traffic steering policies to SMF and AMF
- Authorizes dynamic application QoS reservations from external AFs
- Negotiates off-peak Background Data Transfer (BDT) time windows
Specifications
3GPP TS 29.507, TS 29.512, TS 29.514
Interfaces
NpcfSBI
Related 5G Concepts
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