5G • RAN
Cross-Carrier Scheduling
Cross-Carrier Scheduling via CIF
PDCCH on one component carrier schedules PDSCH or PUSCH transmissions on a different component carrier.
Technical Explanation
To protect control channels from severe interference on secondary carriers, Cross-Carrier Scheduling transmits PDCCH exclusively on a robust primary carrier (PCell). A 3-bit Carrier Indicator Field (CIF) inside the DCI designates which SCell is scheduled for data reception or transmission.
Key Functions
- Concentrates control channel transmission on high-reliability primary carrier
- Identifies target component carrier using 3-bit Carrier Indicator Field (CIF)
- Protects control channels from severe interference in heterogeneous networks
Specifications
3GPP TS 38.213
Interfaces
Uu
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