Question: In a 5G E-UTRAN network, which physical layer measurement is NOT specifically defined for sidelink communications in relation to signal strength or power?
Option 1: Sidelink Reference Signal Received Power (S-RSRP)
Option 2: Downlink Reference Signal Received Power (DL-RSRP)
Option 3: Sidelink Discovery Reference Signal Received Power (SD-RSRP)
Option 4: PSSCH Reference Signal Received Power (PSSCH-RSRP)
Explanation: Options 1, 3, and 4 (S-RSRP, SD-RSRP, and PSSCH-RSRP) are supported measurements for sidelink in E-UTRAN. In contrast, Downlink Reference Signal Received Power (DL-RSRP) is relevant to downlink communications from base station to UE, not specifically defined for sidelink (device-to-device or UE-to-UE) communications.