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Summary of Agreements by Topic

Coverage Enhancement for NR NTN

1. PUCCH Repetition for Msg4 HARQ-ACK:
• Supported repetition factors: 1, 2, 4, 8.
• If a single value from {2, 4, 8} is configured via SIB, the configured repetition factor is applied.
• If multiple values are configured, one value is indicated in the DAI field of DCI format 1_0 with CRC scrambled by TC-RNTI.
• Frequency hopping mechanism defined in Rel-15/16/17 is applied for PUCCH transmission in every slot.
• A RSRP threshold can be configured via SIB to determine whether the UE reports capability for PUCCH repetition.
2. NTN-Specific PUSCH DMRS Bundling:
• UE maintains phase continuity considering effects of transmission delay variation between UE and uplink time synchronization reference point.
• No consensus on TA pre-compensation update within an actual TDW or antenna switching-related enhancements.
3. Dynamic Indication:
• No consensus on whether to introduce dynamic indication when a single repetition factor is configured.
4. UE Behavior:
• No further discussion needed for UE behavior when no repetition factor is configured or when the measured RSRP is below the configured threshold.

Network Verified UE Location for NR NTN

1. UE Rx-Tx Time Difference:
• Defined as the difference between the UE's received timing of a downlink subframe and the transmit timing of the closest uplink subframe.
• Time durations of OFDM symbols at the receiver are assumed to be the same as defined in TS 38.211.
2. DL Timing Drift:
• Reported as the variation rate of the downlink delay in ppm due to Doppler over the service link.
3. Assistance Information:
• Ephemeris information, including accurate satellite position and velocity, should be available at the LMF.
• Common TA parameters (ta-Common, ta-CommonDrift, ta-CommonDriftVariant, Epoch time) can be reported from gNB to LMF.
4. Multi-RTT Method:
• UE-specific TA offset for pre-compensation of two-way transmission delay is not reported to the LMF.

RACH-less Handover

1. Power Control:
• Pathloss measurement for dynamic scheduled initial PUSCH is calculated using a resource from the SS/PBCH block with the same index as the one used for PDCCH monitoring.
2. CORESET:
• Further discussion required on which CORESET to use for RACH-less handover.
3. Text Proposal:
• Endorsed text proposal for TS 38.213 clause 22 to clarify procedures for RACH-less handover.

FR2-NTN Aspects

1. PRACH Configuration:
• Table 6.3.3.2-4 of TS 38.211 is used as the baseline for PRACH configuration.
• Decision on whether to reuse the table without modification or with modifications deferred to RAN1#116bis.
2. Timing Advance:
• No consideration for negative timing advance indication through TAC in MAC RAR for FR2-NTN unless requested by RAN4.
3. Extended Cyclic Prefix:
• Scope not expanded to cover SCS other than 60 kHz in Rel-18.

Disabling HARQ Feedback for IoT NTN

1. DCI-Based Indication:
• HARQ feedback enabled/disabled is indicated using the HARQ-ACK related field in DCI format 6-1B for eMTC and N1 for NB-IoT.
2. Multiple TBs:
• HARQ feedback is reported for all TBs when enabled and not reported when disabled.
3. Timers:
• For Option 1 + Option 3 DCI-based overridden mechanism, NB-IoT UE waits for RTT+3ms before monitoring NPDCCH when HARQ feedback is enabled.

Improved GNSS Operations for IoT NTN

1. GNSS Measurement Gap:
• Start time of the gap is determined based on HARQ feedback for the MAC CE:
• Disabled: n+12ms for NB-IoT, n+56ms for eMTC.
• Enabled: p+2ms for NB-IoT, p+2ms for eMTC.
2. UL Transmission Extension:
• UL transmission after original GNSS validity duration expires is enabled/disabled by the network.
• Duration X is configured via a 3-bit field with values {sf500, sf750, sf1280, sf1920, sf2560, sf5120, sf10240}.
3. Timers:
• ULTransmissionExtensionTimer is reset with length equal to Y every time a MAC CE is received.

Satellite Switch with Resync

1. Feasibility:
• RAN1 concludes it is feasible for satellite switch with resync under specified conditions.

Other Agreements

1. Higher Layer Parameters:
• Endorsed higher layer parameters for NR NTN and IoT NTN, including ULTransmissionExtension and ULTransmissionExtensionValue.
2. Text Proposals:
• Endorsed text proposals for TS 38.300 and TS 36.213 to capture agreements on coverage enhancements, GNSS operations, and HARQ feedback disabling.

This summary captures the key agreements across various topics discussed in the document.