16 November to 20 November 2026Calgary3GPP TSG RAN WG1Last updated 2026-11-09
At a glance
CSI acquisition work covers configurable CPI-based reporting and JSCC or JSCM feedback proposals.
Sensing integration pairs a nominal CPI working assumption with proposals on reporting and path ambiguity.
Synchronization proposals address SSB timing and guard resources, while PRACH proposals address formats and GNSS resilience.
Sensing evaluations also need a basis for performance objectives and micro-Doppler modelling.
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CSI proposals cover configurable or downloadable bases for CPI reporting and JSCC or JSCM frameworks for feedback. The first includes transmit-side and receive-side spatial covariance, while the second targets feedback efficiency.
Reporting granularity remains a study item in the configurable-bases proposal, including frequency averaging and single-subcarrier reporting. Its initial evaluations focus on DFT and port-selection basis options.
Futurewei
Proposal
Support configurable/downloadable bases/codebooks for PMI reporting based on CPI in 6G. The configurable/downloadable bases for PMI reporting are the bases for CPI reporting CPI reporting ...
Nominal CPI is a working assumption for discussion of coherent sensing RS processing. Its processing domain, shared knowledge and continuity recovery remain FFS.
One proposal puts physical-layer report content in RAN1 and configuration selection with higher layers or the SF. Another assigns ambiguous path-pair identification to the aNB or CN for path and object metrics.
Nokia
Proposal
RAN1 shall define the measurement-report configuration framework and supported physical-layer report contents; ...
One proposal sets a 160 ms default SSB period, with up to four repetitions and combining within that period. Another proposes studying guard or reserved resources for UE UL-DL transitions, SBFD separation and monostatic sensing.
The SSB proposal concerns default synchronization timing. The guard-resource proposal addresses resource separation across communication and sensing uses.
Futurewei
Proposal
Adopt Option 1 for 6GR default SSB periodicity of 160 ms and maximum number of 4 SSB repetitions and combining within one default SSB period.
Sensing evaluation proposals address common performance objectives and target-specific micro-Doppler modelling. The proposed objectives cover UAV, human, automotive and AGV use cases.
The micro-Doppler proposal uses representative human and UAV motion functions within the existing TR 38.901 ISAC channel-model framework. These proposals concern what evaluations measure and how target motion is represented.
Nokia
Proposal
RAN1 uses the proposed performance objectives in Table 3 as the common performance requirements for 6G sensing study for UAV, Human, Automotive, and AGV use ...
When micro-Doppler is evaluated for 6GR ISAC, use representative target-specific micro-motion functions, at least for human and UAV targets, within the existing TR 38.901 ISAC ...
One PRACH proposal puts specified long- and short-sequence NR formats under study for 6GR. Another proposes Rel-20 GNSS resilience enhancements as a starting point for GNSS-degraded and GNSS-less UEs.
The format proposal names long formats 0 and 1 and five short formats. The resilience proposal addresses which existing enhancements to consider for UEs without reliable GNSS.
Nokia
Proposal
Proposal 6: 6GR PRACH considers for study at least the NR PRACH formats 0 and 1 (long sequence) and A2, A3, B4, C0 and C2 ...
RAN1 adopts the following definition on nominal Coherent Processing Interval (CPI) for discussion purpose “nominal CPI”: The time interval for sensing measurements during which the ...
Source:R1-2607289 (Chair notes). 3GPP TSG RAN WG1 #126-bis.
3What to watch
Watch whether CSI work narrows the reporting granularity and initial basis options proposed for evaluation.
Downlink transmission scheme(s) for downlink shared channels
65
9.6
Rel-20 UE features
62
10.5.1.1
Synchronization acquisition and beam measurement
61
10.8.2
Aspects of integration with communication
61
10.5.2.3
Uplink transmission scheme(s) for uplink channels
57
10.5.4.1
Downlink control channel, scheduling for downlink and uplink transmission
52
10.7.1
NTN specific requirements and design
51
10.5.1.3
Bandwidth operation
49
10.5.2.1
Downlink transmission scheme(s) for downlink control channels
49
9.4.1
NR-NTN GNSS resilience
47
10.5.1.2
PRACH and RACH procedure
46
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