5G • 5G-Advanced (Rel-18)
SRS-RSRP for CLI
Sounding Reference Signal RSRP for Cross-Link Interference
Measurement framework where victim UEs or gNodeBs measure the isolated reference signal power transmitted by specific aggressor UEs in SBFD.
Technical Explanation
Unlike CLI-RSSI which measures blind aggregate noise, SRS-RSRP allows a victim node to detect the exact Sounding Reference Signal (SRS) sequence transmitted by a specific aggressor device. This enables the base station to identify precisely which transmitting terminal is causing interference, executing directed spatial beam nulling or power back-off.
Key Functions
- Identifies specific aggressor terminals causing cross-link interference
- Measures channel path loss between interfering user devices directly
- Enables gNodeB schedulers to apply targeted spatial nulling or resource segregation
- Improves interference resolution accuracy over generic wideband RSSI measurements
Specifications
3GPP TS 38.215, TS 38.214 (Rel-18)
Interfaces
Uu (SRS)
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