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Summary of Agreements by Topic for Rel-19 Network Energy Savings (NES)

On-Demand SSB SCell Operation

1. Time Location Between Always-On SSB and On-Demand SSB:
• No restriction on overlapping time locations between always-on SSB and on-demand SSB.
• Supported cases:
• Union of AO-SSB and OD-SSB transmission has a periodic or non-periodic time domain pattern.
• Time instance A for OD-SSB transmission is determined based on the active UL BWP SCS where UE transmits ACK for MAC-CE.
2. Frequency Location:
• If AO-SSB is CD-SSB on sync raster, OD-SSB frequency location is different and not on sync raster.
• AO-SSB and OD-SSB are located in the same BWP.
3. Deactivation of OD-SSB:
• Supported via MAC-CE or based on the configured number of bursts (od-ssb-nrofBurst).
• Time instance B for deactivation is determined based on the slot where MAC-CE is received.
4. Higher Layer Parameters for OD-SSB Configuration:
• Parameters include frequency, SSB positions, periodicity, sub-carrier spacing, physical cell ID, time location, transmit power, and number of bursts.
• Separate configuration for AO-SSB and OD-SSB supported.
5. Measurement and Reporting:
• CSI report configuration can be associated with AO-SSB, OD-SSB, or both.
• UE behavior for measurement is up to implementation, provided RAN4 requirements are met.

On-Demand SIB1 for Idle/Inactive Mode UEs

1. UL-WUS Configuration:
• Parameters include PhysCellId, ARFCN-ValueNR, K_SSB, searchSpaceZero, controlResourceSetZero, ra-PreambleStartIndex, od-sib1-duration, and od-sib1-windowStartOffset.
• CarrierBandwidth and locationAndBandwidth included for MPR calculation.
2. PDCCH Monitoring for OD-SIB1:
• UE monitors PDCCH occasions corresponding to SSB associated with transmitted PRACH for UL-WUS.
• Indication of K_SSB value in UL-WUS configuration is 5 bits for FR1 and 4 bits for FR2.
3. Time Window for OD-SIB1:
• Reference time point is the starting slot of the RAR window for UL-WUS.
• Time offset between reference point and window start is indicated in UL-WUS configuration.
4. Support for Multiple NES-CellId(s):
• How to support multiple NES-CellId(s) is up to RAN2 discussion.
5. Joint PRACH Request:
• No consensus to support joint PRACH request for triggering both OD-SIB1 and OD-OSI.

Adaptation of Common Signal/Channel Transmissions

1. PRACH Adaptation:
• Additional PRACH resources configured within the same RACH-ConfigCommon in SIB1.
• DCI format 1_0 with P-RNTI used for adaptation indication.
• PRACH mask applicable at the unit of PRACH association period.
2. SSB Adaptation:
• UE can be configured with up to 2 additional SSB burst periodicities for an SCell.
• DCI format 2_9 used for SSB burst periodicity adaptation, scrambled with a new RNTI.
3. Validity Duration for PRACH Resources:
• Configured via higher layer signaling, with options for multiples of SI modification periods.
4. PRACH Mask Details:
• Semi-static signaling of PRACH mask index and association pattern periods supported.

General Agreements

1. No New SSB Burst Periodicity Values:
• Legacy values (5 ms, 10 ms, 20 ms, 40 ms, 80 ms, 160 ms) retained.
2. No Support for SSB Adaptation in Time Domain for CD-SSB:
• Adaptation of transmitted number of SSBs within a burst or time domain positions not supported.
3. DCI-Based Adaptation:
• DCI format 1_0 with P-RNTI used for PRACH adaptation.
• Validity duration and reference point for availability information defined.
4. UE Behavior for OD-SIB1:
• UE does not monitor Type 0 PDCCH occasions for OD-SIB1 before successfully receiving RAR in response to UL-WUS.

This summary consolidates the agreements across various topics discussed in Rel-19 NES enhancements.