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> Provide an extensive summary of the agreements by topic. No need to mention CRs.

Summary of Agreements by Topic

Timing Relationship Enhancements

1. K_offset Usage:
• Introduced K_offset to enhance timing relationships for various operations, including DCI scheduled PUSCH, HARQ-ACK on PUCCH, and aperiodic SRS.
• UE-specific K_offset valid at the slot of the associated DCI being received is applied.
• Beam-specific K_offset is not supported for initial access in Rel-17 NTN.
2. Epoch Time:
• Epoch time for serving cell explicitly indicated by SFN and subframe number is considered the current or next upcoming SFN after the message is received.
• Epoch time for neighbor cell is considered the frame nearest to the message reception.
3. Common TA Parameters:
• Common TA parameters (TACommon, TACommonDrift, TACommonDriftVariation) are defined with specific ranges and granularity.
• Negative values of CommonDelayDriftVariation for GEO are not indicated.
4. Validity Duration:
• Validity duration applies only to ephemeris and common TA parameters, not other parameters like K_offset.

UL Time and Frequency Synchronization

1. Ephemeris Formats:
• Support for position and velocity state vector ephemeris format and orbital parameter ephemeris format for LEO/MEO/GEO.
• ECI and ECEF frames coincide at Epoch time.
2. TA Calculation:
• UE calculates TA using its position and serving satellite ephemeris.
• Common TA parameters are used to determine one-way propagation time for synchronization.
3. Validity Duration:
• Single validity duration for serving satellite ephemeris and common TA parameters is broadcast in the same SIB message.

HARQ Enhancements

1. Type-1 HARQ-ACK Codebook:
• UE consistently reports NACK-only for feedback-disabled HARQ processes regardless of decoding results.
• HARQ feedback for SPS activation may be enabled by the network.
2. Type-2 HARQ-ACK Codebook:
• HARQ-ACK information for feedback-disabled HARQ processes is excluded from PUCCH power control calculations.
• Multiplexing HARQ-ACK information in PUSCH is disabled if UL DAI excludes feedback-disabled HARQ processes.
3. HARQ Feedback for SPS PDSCH:
• UE follows per-process configuration of HARQ feedback enabled/disabled for associated HARQ processes.

Other Enhancements

1. Polarization Signaling:
• NTN-NR Rel-17 does not support per-beam polarization signaling.
• No consensus on UE reporting polarization capability or behavior for selecting polarization mode.
2. Assistance Information Validity:
• UE may consider assistance information valid as soon as it is received.
• No specification impact expected.
3. RRC Parameter Name Alignment:
• Names of parameters like CellSpecific_Koffset, Koffset, and HARQ-feedbackEnablingforSPSactive aligned across specifications.

General Maintenance

1. Corrections:
• Editorial corrections for alignment across specifications (e.g., TS38.213, TS38.212).
• Clarifications on timing advance and synchronization behaviors.
2. Dropped Proposals:
• Certain CRs and proposals were not pursued in Rel-17 due to lack of consensus or relevance.

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