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6G General Aspects and Frameworks
Futurewei presents 7 proposals and 9 observations on 6G Radio frameworks, covering maximum bandwidth interpretations, UE 400MHz DL support options, intra-cell and inter-cell carrier aggregation, smallest maximum UE bandwidth for low-tier devices, and initial access design…
Futurewei proposes studying intra-cell carrier aggregation (Method 1 'Gothia cell') using multiple contiguous/non-contiguous physical carriers up to 400 MHz logical bandwidth, and inter-cell carrier aggregation including FR1+FR2…
6G Synchronization Acquisition and Beam Measurement
This document presents 7 proposals and 15 observations covering synchronization/system information and paging transmission/monitoring for 6G Radio. It advocates for longer default SSB/SIB1 periodicity combined with light sync signals and on-demand mechanisms for network energy…
Futurewei proposes supporting basic 6GR SSB design with bandwidth larger than 3MHz at 15KHz SCS, rejecting the ≤3MHz option as degrading PBCH detection performance and coverage compared to 5G NR's 3.6MHz SSB bandwidth. They propose…
6G Bandwidth Operation
This Futurewei contribution on 6G Bandwidth Operation contains 10 proposals and 2 observations. It advocates for a simplified 6GR bandwidth operation framework that addresses lessons learned from 5G NR BWP, focusing on energy efficiency, reduced complexity, and improved spectrum…
Futurewei proposes that 6GR bandwidth operation study focus on BW determination and adaptation optimizing energy efficiency and spectrum utilization for diverse device types. They identify specific 5G NR BWP design disadvantages—excessive…
Discussion on 6G Design of WUS with OFDM based Sequence
This Futurewei contribution discusses the design of 6G downlink Wake-Up Signal (WUS) using OFDM-based sequences, building on Rel-19 LP-WUS. It presents 6 observations and 5 proposals, arguing for extending coverage to the PDCCH target and proposing design simplifications by…
Futurewei proposes reusing Rel-19 LP-WUS design aspects, specifically Zadoff-Chu OFDM sequences defined before DFT processing, as a starting point for 6G DL WUS but requires removing the underlying OOK signal and Manchester encoding. They…
Discussion on 6G WUS Operation in RRC States
This Futurewei contribution discusses the design of 6G Downlink Wake-Up Signal (WUS) based on OFDM sequences, analyzing coverage, RRC IDLE/INACTIVE, and RRC CONNECTED operations based on Rel-19 LP-WUS. The document presents 15 observations and 4 proposals aimed at unifying…
Futurewei proposes a unified 6G DL WUS design based on OFDM sequences to replace both Rel-17 PEI and Rel-19 LP-WUS for idle/inactive paging, and both Rel-16 DCP and Rel-19 LP-WUS for connected state energy saving — avoiding multiple…
Discussion on 6G Uplink WUS and Operation
Futurewei's contribution discusses UL WUS as an enabler for on-demand SS/PBCH/SIB1 operation in 6G, analyzing six deployment scenarios (DS#1a-c, DS#2a-c) and making 5 proposals and 11 observations regarding feasibility, configuration acquisition, and design aspects.
Futurewei frames UL WUS primarily as an operational enabler for on-demand SS/PBCH/SIB1 rather than a standalone waveform design topic. They propose prioritizing the study of on-demand SIB1 using UL WUS in DS#1b and DS#2, and studying SIB1…
Discussion on 6G NTN
This Futurewei contribution addresses 6G NTN open issues from RAN1#124, containing 2 formal proposals and 3 observations. It focuses on the satellite beam footprint coverage ratio during initial access and the impact of beam hopping patterns on UE performance.
Futurewei proposes that RAN1 agree on a 100% satellite beam footprint coverage ratio before proceeding with studies on beam footprint versus active beam mismatch, and suggests that simultaneous active beams may be as low as 1.5% of total…
Uplink transmission scheme(s) for uplink channels
Futurewei's Tdoc R1-2601789 presents eight proposals and one observation for 6G uplink transmission schemes, covering AI/ML-based DMRS optimization, frequency-selective precoding, QCL/TCI enhancements, and unified frameworks for power control, timing advance, and carrier…
Futurewei proposes including AI/ML-based DMRS configuration optimization for UL DMRS enhancement, citing experimental NMSE improvements using lower-density DMRS configurations with LS-based preliminary estimation as input to AI/ML models…
Discussion on beam management for downlink and uplink for 6GR air interface
Futurewei presents 3 Observations and 7 Proposals on 6G beam management, covering one-shot beam acquisition, QCL/TCI enhancements using UL signals, UE-initiated beam management latency reduction, AI/ML cross-frequency beam prediction, and simulation assumptions.
Futurewei proposes a mixed antenna architecture combining a low-resolution all-digital receiver array for one-shot beam acquisition with an analog/hybrid array for data transmission to eliminate beam sweeping procedures. They require…
Discussion on aspects of downlink-based CSI acquisition for 6GR air interface
Futurewei presents 12 proposals and 5 observations on 6G downlink-based CSI acquisition, covering CSI-RS overhead reduction via structured port-to-RE mapping and AI/ML-based prediction, AI/ML-based CSI compression and feedback with JSCC and downloadable codebooks, CSI…
Futurewei proposes studying structured mapping between CSI-RS ports and REs in spatial, frequency, and time domains to facilitate CSI-RS overhead reduction, demonstrating that a beam-domain-first transformation approach achieves…
Aspects of uplink-based CSI acquisition
This Futurewei contribution proposes 10 specific proposals and 2 observations focused on uplink-based CSI acquisition for 6G, covering hybrid antenna architectures for upper midband, enhanced SRS-based cooperative MIMO with downlink interference probing, and QCL/TCI…
Futurewei proposes that hybrid antenna architectures with large antenna element counts and moderate TXRU counts be a key focus for UMB base stations, specifically defining hybrid beamforming as a combination of adjustable analog…
Other Aspects for CSI acquisition
This document from Futurewei contains 2 main proposals addressing enhancements for CSI acquisition in 6G. It focuses on introducing multi-port TRS to improve QCL parameter derivation for massive MIMO and supporting early/on-demand tracking acquisition for fast SCell activation…
Futurewei proposes studying multi-port TRS as a QCL source to address precoding mismatch between single-port TRS and dynamically precoded DMRS/CSI-RS in massive MIMO systems, suggesting the UE applies a precoding vector to the multi-port…
Discussion on channel coding for 6GR
Spreadtrum/UNISOC presents 3 proposals and 2 observations on 6G channel coding, covering data channel LDPC extension and control channel Polar code design for payloads beyond NR range. The document argues for preserving NR LDPC parameters (maximum code block size of 8448 and 22…
Spreadtrum/UNISOC proposes that the LDPC extension beyond NR range retain the maximum code block size of 8448 and 22 information columns in the base graph, arguing that the 22×384 configuration fully preserves the NR LDPC structure and…
Discussion on modulation for 6GR
In R1-2601804, Spreadtrum presents discussion and proposals on 6GR modulation across four areas: higher-order modulation evaluation, constellation shaping (probabilistic and geometric), PAPR evaluation, and control channel modulation. The document contains 11 observations and 8…
Spreadtrum proposes parallel and independent evaluations between RAN1 and RAN4 for DL 4096QAM and UL 1024QAM, with RAN1 focusing only on ideal baseband performance without RF impairment modeling, and requires alignment with RAN4's existing…
Discussion on energy efficiency
Spreadtrum presents 9 proposals and 2 observations on UE and NW power consumption modeling for 6G energy efficiency evaluations, addressing remaining issues from previous meetings including low power modes, paging rates, processing state values, and scaling rules.
Spreadtrum proposes studying whether the BS LP/EE mode is an isolated state versus a mode performed during a sleep state with additional relative power value. They require reusing UE/Group paging rates from TR 38.869 and require companies…
Discussion on 6GR general aspects and frameworks
This Spreadtrum/UNISOC contribution to the 3GPP RAN1 #124bis meeting presents 21 proposals and 2 observations covering 6G Radio (6GR) general aspects, including maximum bandwidth, scalability, spectrum aggregation via 'Gothia cell', duplexing, and MRSS. The document aims to…
Spreadtrum/UNISOC requires a 20MHz smallest maximum UE bandwidth (Alt 1) for lower-tier 6GR devices, arguing that 20MHz offers an optimal balance between complexity reduction (35-70%) and system performance compared to 5MHz. They propose…
Discussion on synchronization acquisition and beam measurement
Spreadtrum (UNISOC) presents 43 proposals and 8 observations on 6GR synchronization acquisition and beam measurement, advocating a conservative evolutionary approach that largely inherits NR's initial access procedures, SSB structure, and signaling while selectively enhancing…
Spreadtrum proposes that 6GR initial access design should inherit NR's fundamental procedures, SSB structure (20 PRBs, 4 OFDM symbols), and PSS/SSS/PBCH architecture as the baseline, with a default SSB periodicity of 40ms for initial…
Discussion on 6GR PRACH and RACH procedure
Spreadtrum presents 2 observations and 17 proposals on 6G PRACH and RACH procedure design, arguing that NR features introduced after Rel-16 have seen limited deployment and advocating for a unified random access framework with all necessary features integrated from 6G Day-1.
Spreadtrum proposes that all necessary PRACH features be integrated into a unified random access framework from 6GR Day-1, citing limited commercial deployment of post-Rel-16 NR features as justification. They propose studying PRACH…
Discussion on bandwidth operation
This Spreadtrum contribution provides 8 proposals and 2 observations on 6GR bandwidth part (BWP) operation across initial access, idle mode, and connected mode, focusing on reusing NR mechanisms while addressing spectrum fragmentation and BWP switching complexity.
Spreadtrum proposes reusing NR's mechanism for determining CORESET-0 via MIB and the concept of initial DL/UL BWP as a starting point for 6GR. They require that SIB1, Msg2, Msg4, and scheduling PDCCH bandwidths be confined within…
Discussion on downlink transmission scheme(s) for downlink control channels
This Spreadtrum contribution to the 3GPP 6G study item provides a comprehensive framework for the 6G-R (6GR) downlink control channel (PDCCH) design, largely reusing NR as a baseline. It contains 45 total proposals and 4 observations covering general PDCCH structure,…
Spreadtrum proposes largely inheriting the NR PDCCH structure (CORESET, CCE, REG, REG bundles, hash functions) as the baseline for 6GR, requiring REG to consist of one RB in one OFDM symbol to avoid resource fragmentation. They require…
Discussion on downlink transmission scheme(s) for downlink shared channels for 6GR
Spreadtrum presents a comprehensive analysis of downlink transmission schemes for 6G, containing 21 proposals and 5 observations covering PDSCH design, DMRS, PTRS, and MRSS aspects. The document argues for simplifying 6G designs relative to 5G NR by unifying schemes, minimizing…
Spreadtrum proposes maintaining 5G NR layer limits (max 8 layers, 2 codewords) and a baseline layer mapping rule where the first half layers map to CW0 and remaining to CW1, with a single MCS per codeword. They require a single PDSCH…
Discussion on uplink transmission scheme(s) for uplink channels for 6GR
Spreadtrum's contribution to 3GPP RAN1#124b provides 23 proposals and 5 observations on 6G uplink transmission schemes, covering PUSCH antenna ports, DMRS design with AI/ML overhead reduction, resource allocation, PUCCH formats, and new technologies like L1 UE aggregation and…
Spreadtrum proposes limiting 6G Day 1 PUSCH antenna ports to {1,2,4}, with 8-port studied only for CPE/FWA, arguing 8-port UEs have not been commercially used despite NR spec support. They propose a simplified unified uplink codebook…
Discussion on beam management for downlink and uplink for 6GR
Spreadtrum presents 2 observations and 11 proposals on 6G beam management, arguing NR beam management effectively improves performance but suffers from excessive spec complexity across releases. They propose a unified 6G framework integrating NW-initiated and UE-initiated beam…
Spreadtrum proposes adopting hybrid beamforming as the fundamental 6G architecture and using NR beam measurement procedures (P1/P2/P3, U1/U2/U3) and the NR unified TCI framework as the baseline for 6G design. They propose studying a…
Discussion on aspects of downlink-based CSI acquisition for 6GR
Spreadtrum's R1-2601814 presents 21 proposals and 12 observations on 6G downlink CSI acquisition, covering a unified CSI framework, basic CSI-RS design supporting up to 128 ports, and AI/ML-based CSI compression and low-overhead CSI-RS. The document recommends postponing…
Spreadtrum proposes a unified CSI acquisition framework spanning sTRP, mTRP, mTRP calibration, and early CSI scenarios, preferring to study inclusion of candidate cell early CSI rather than creating separate frameworks. They oppose…
Discussion on aspects of uplink-based CSI acquisition for 6GR
This Spreadtrum contribution presents 14 proposals and 4 observations on 6G SRS design, addressing antenna port configurations, transmission schemes, AI-based overhead reduction, and integration with sensing. The document covers baseline SRS features inherited from NR alongside…
Spreadtrum recommends focusing 6GR Day1 SRS design on {1,2,3,4} antenna ports rather than >8 ports, citing lack of commercial 8-port device deployment despite NR Rel-18 support. They propose reusing NR baselines including Zadoff-Chu…
Discussion on other aspects of CSI acquisition and report for 6GR
This document from Spreadtrum/UNISOC discusses design aspects for PT-RS and TRS in 6GR, making 4 proposals. The company advocates for a dedicated PT-RS design based on the mature 5G NR framework and proposes reusing CSI-RS with dedicated configuration for TRS, while recommending…
Spreadtrum proposes introducing a dedicated PT-RS design specifically tailored for phase noise estimation, arguing that existing 6GR reference signals (CSI-RS, DMRS, SRS) are insufficient due to their distinct design principles. They…
Discussion on downlink control channel, scheduling for DL and UL transmission
{
"summary": "This Spreadtrum contribution discusses downlink control channel and scheduling design for 6GR, presenting 120 proposals and 21 observations across DCI formats, DCI structures, DCI size/budget, L1 signaling for DL/UL scheduling, PDCCH energy efficiency, and…
Discussion on HARQ related aspects
This Spreadtrum contribution discusses 6G HARQ-related aspects, presenting 22 observations and 15 proposals across feedback timing, codebook design, processing timelines, ARQ integration, and HARQ process management. The document advocates for simplifying NR's complex HARQ…
Spreadtrum proposes simplifying 6G HARQ timing by introducing a single reference time and one point for HARQ-ACK on PUCCH and UCI mapping on PUSCH, arguing against NR's complex symbol-level overlap checking with variable PUCCH resource…
Discussion on other physical layer signals, channels and procedure
This Spreadtrum contribution discusses other physical layer signals, channels, and procedures for 6GR, focusing on scheduling request mechanisms, interference management (UE-to-UE, BS-to-BS, remote), and NR-6GR coexistence. The document contains 11 numbered…
Spreadtrum requires that 6GR physical uplink control signaling carry scheduling requests combinable with other UCI, and requires support for the SR+BSR mechanism while proposing further study of contention-based UL transmission. For…
Discussion on design of WUS with OFDM based sequence
Spreadtrum's contribution to RAN1#124bis provides 9 proposals on 6G DL WUS design, emphasizing a unified OFDM-based sequence approach for all device types and RRC states. The document covers evaluation assumptions, waveform selection, synchronization, and information content…
Spreadtrum proposes a unified DL WUS design for all device types to avoid market fragmentation. They prefer CP-OFDM waveform over DFT-S-OFDM based on Rel-18 power consumption evaluations showing marginal UE-side difference and cite loss of…