R1-2508909
discussion
Discussion on evaluation assumptions for 6GR air interface
From LG Electronics
Summary
LG Electronics presents 10 proposals across General, MIMO, NTN, and ISAC topics for 6G Radio evaluation assumptions, advocating 5G reuse as a baseline while introducing extensions for multi-carrier operation, composite requirements, advanced MIMO with up to 48 MU layers, detailed NTN satellite parameters across L/S/Ku/Ka bands, and vehicular deployment scenarios.
Position
LG Electronics proposes reusing 5G evaluation assumptions as the baseline for 6GR, extending them with evaluation frameworks that reflect multi-carrier and multi-band resource management and link adaptation strategies. They propose studying joint/composite requirements where throughput, latency, reliability, and capacity must be jointly satisfied, requiring refinement of component TPRs such as distinguishing average versus 5-percentile data rates and over-the-air versus end-to-end latency. For MIMO, they propose adopting TR 38.901 channel modeling with up to 8 Tx/8 Rx UE antenna ports, rank-8 transmission, and 48 MU-MIMO layers, citing sub-array modeling as a starting point for hybrid beamforming. For NTN, they propose detailed satellite parameters across L/S/Ku/Ka bands and GEO/LEO orbits, specifying EIRP values with OBO of [5] dB for CP-OFDM and [3] dB for DFT-s-OFDM, and emphasize VLEO from 300km altitude as a good starting point due to 4ms RTT at nadir with transparent payload. For ISAC, they propose studying urban grid and highway deployment scenarios based on TR 37.885 attributes for automotive applications.
Key proposals
- Proposal 1 (General): For 6GR evaluation, consider evaluation assumptions used in 5G as a baseline.
- Proposal 2 (General): Consider evaluation frameworks that reflect advanced resource management and link adaptation strategies across multiple carriers and bands in 6G.
- Proposal 3 (General): Study the definition and evaluation of joint/composite requirements, including refinements of component TPRs and identification of relevant metrics.
- Proposal 4 (MIMO): For 6GR MIMO evaluation, adopt channel modelling in TR 38.901, and consider UE antenna configuration up to 8 Tx/8 Rx antenna ports, max transmission rank 8 for both DL and UL, and max number of MU layers 48.
- Proposal 5 (NTN): Clarify the carrier frequency for Ku-band as 14GHz for UL and 12GHz for DL.
- Proposal 6 (NTN): Consider aggregated system bandwidth up to [60] MHz (DL+UL) for L-band and S-band, up to [200] MHz for Ku-band, and up to [800] MHz for Ka-band as starting points.
- Proposal 7 (NTN): Consider single-layer hexagonal grid layout with IBD 1732m and 5000m, [10] users per TRxP, specified outdoor/indoor/vehicle distributions per band, and orbit types from VLEO (300-600km) to GSO (~35,786km) as starting points.
- Proposal 8 (NTN): Consider transparent payload with specified equivalent satellite antenna apertures, TX max gains, and aggregated satellite EIRP values for L/S-band, Ku-band, and Ka-band across GEO, LEO-1200, and LEO-600 orbits as starting points.
- Proposal 9 (ISAC): Study urban grid and highway scenario for vehicular application in 6GR deployment scenarios.
- Proposal 10 (ISAC): The attributes for Urban grid and Highway scenario in Table 1 and Table 2 are as a starting point for urban grid and highway scenario.