5G • 5G-Advanced (Rel-18)
SBFD UE Capability Signaling
User Equipment SBFD Feature Set and Bandwidth Part Compatibility
RRC signaling parameters defining whether a terminal supports simultaneous multi-BWP operations, fast retuning, and CLI measurement reporting.
Technical Explanation
Not all user devices can transmit and receive simultaneously. In Release 18, UEs indicate their SBFD capability via RRC parameters: Category A devices operate strictly in half-duplex but adapt dynamically to SBFD sub-bands via Bandwidth Parts (BWPs); Category B devices possess full duplex hardware capable of simultaneous dual-link operation.
Key Functions
- Signals terminal hardware capabilities regarding SBFD frequency support via RRC
- Enables legacy half-duplex Release 15-17 terminals to operate smoothly on SBFD carriers
- Configures sub-band-specific Bandwidth Parts (BWPs) matching terminal RF filters
- Manages terminal power consumption during high-speed frequency hopping across sub-bands
Specifications
3GPP TS 38.306, TS 38.331 (Rel-18)
Interfaces
Uu (RRC)
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