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Summary of Agreements by Topic
SBFD TX/RX/Measurement Procedures
- Configuration of SBFD Symbols:
- Parameters supported for SBFD symbol configuration
include starting/ending slot and symbol indices within a TDD-UL-DL
pattern period.
- Frequency locations of SBFD UL/DL subbands are indicated
using RIV-based configuration.
- PUSCH and PRB Handling:
- For PUSCH repetition type B, actual repetitions are
segmented around SBFD and non-SBFD symbol boundaries.
- PRBs for PUSCH transmissions in SBFD symbols are
determined using legacy methods, with starting PRB calculated based on
specific equations.
- SRS Resource Configuration:
- Separate SRS-ResourceSets configurations for SBFD and
non-SBFD symbols are supported for usage set to 'beamManagement.'
- Frequency hopping counter for SRS resources is calculated
as legacy.
- CSI Reporting:
- Valid symbol type for CSI derivation is configured in
CSI-ReportConfig.
- CSI reporting subband size in SBFD symbols is determined
based on DL BWP size as legacy.
- Power Control:
- Separate UL power control parameters for SBFD and
non-SBFD symbols are supported, including configurations for PUSCH,
PUCCH, and SRS transmissions.
- Multi-Carrier Scenario:
- SBFD operation is supported on one TDD carrier in
multi-carrier scenarios, with UE-dedicated signaling for Scell
configuration.
SBFD Random Access Operation
- RACH Configuration Options:
- Separate indexing for PRACH occasions in Additional-ROs
and Legacy-ROs is supported.
- Msg3 PUSCH transmission power is determined based on
preambleReceivedTargetPower configured for respective RO types.
- Power Ramping:
- When switching between Additional-ROs and Legacy-ROs,
power ramping counter is increased.
- Msg3 PUSCH and PUCCH:
- Separate configurations for msg3-Alpha and p0-nominal for
SBFD symbols are supported.
- CBRA Behavior:
- SBFD-aware UEs transmitting Msg1 in legacy-RO follow
legacy behavior during the random access procedure.
- Type-2 Random Access Procedure:
- There is no consensus to support Type-2 random access
procedure (2-step RACH) in SBFD symbols.
CLI Handling
- UL Resource Muting:
- UL muting symbols are semi-statically configured, with
comb offsets {0, 1} for CP-OFDM and DFT-S-OFDM.
- UL muting is not applied in PUSCH symbols containing
PT-RS when transform precoding is enabled.
- CLI Measurement Resources:
- CLI-RSSI measurement resources are configured in one UL
subband, one DL subband, or across two DL subbands.
- Frequency resources for CLI-RSSI measurement across two
DL subbands exclude those outside DL usable PRBs.
- Reporting:
- Periodic L1 CLI-RSSI reporting is supported;
semi-persistent reporting is not.
- CLI reporting criteria considering least interfered
measurements are not supported.
- Power Boosting:
- 3 dB power boosting is applied for PUSCH and PT-RS REs in
symbols containing PT-RS with UL resource muting.
- Measurement Resource Index:
- Mapping order for CSI fields in CLI reporting is defined,
including SRS-RSRP-MRI and CLI-RSSI-MRI.
General Agreements
- Specification Impact:
- No additional specification impact is expected for
certain configurations, such as CLI-RSSI measurement resource subcarrier
spacing.
- Consensus Gaps:
- No consensus on supporting semi-static link direction
indication for SBFD-aware UEs.
- No consensus on supporting separate
featureCombinationPreamblesList configurations for Additional-ROs and
Legacy-ROs.
- LS to RAN4:
- LS sent to RAN4 regarding power boosting impact on
transmit signal quality/MPR and clarification on CLI measurement
configurations.
This summary captures the key agreements across SBFD
TX/RX/measurement procedures, random access operations, and CLI handling
topics.