5G • RAN
Paging Occasion (PO)
Paging Occasion Monitoring Slot
Specific subframe or slot within a Paging Frame where a UE in idle/inactive monitors PDCCH for P-RNTI.
Technical Explanation
To conserve battery, a UE wakes up only on its designated Paging Occasion (PO) within its Paging Frame (PF). The PO timing is calculated via a standardized formula from the UE's 5G-S-TMSI mod N. The UE decodes DCI scrambled with P-RNTI; if its identity is included in the PDSCH paging record, it initiates connection setup.
Key Functions
- Calculated deterministically from UE identity 5G-S-TMSI
- Limits PDCCH monitoring strictly to scheduled milliseconds per DRX cycle
- Enables incoming voice calls and push notifications with minimal standby battery use
Specifications
3GPP TS 38.304
Interfaces
Uu
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