5G • Core Network
PDR
Packet Detection Rule
PFCP rule in UPF specifying match criteria (source interface, IP filters, QFI) to classify incoming packets.
Technical Explanation
A Packet Detection Rule (PDR) is the entry point for user plane packet processing in the UPF. It contains Packet Detection Information (PDI) specifying: Source Interface (Access, Core, SGi-LAN), Tunnel Endpoint ID (TEID), Network Instance, and 5-tuple IP packet filters. When a packet matches a PDR, associated FAR, QER, and URR rules are executed.
Key Functions
- Defines match criteria classifying packets arriving at the UPF
- Evaluates source interface, GTP-U TEID, and 5-tuple IP filters
- Binds matching packets to Forwarding (FAR) and QoS (QER) action rules
Specifications
3GPP TS 29.244
Interfaces
N4
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