Nokia · 10.7.1

Nokia requires that all 6GR NTN capable devices support accurate pre-compensation (GNSS-based or via detailed prior geo-location), and that the 6GR system supports NTN from day one with maximum similarity to TN design. They propose that network-verified UE location features be considered only with mandatory UE support and adequate accuracy. Nokia opposes simultaneous multi-satellite UE connections for CA or multi-orbit operation due to timeline and frequency offset complexity. They propose integrating the k_offset_UE component into the UL scheduling grant (TDRA table) to replace MAC-CE based adjustment, citing latency, reliability, and signaling overhead drawbacks of the current approach. Nokia recommends studying extended PDSCH/PUSCH transmission duration to address HARQ stalling without increasing soft buffer memory, and proposes concurrent scheduling of SIB1 and NTN access essential SIB information to reduce initial access latency. They argue that NTN studies for 6GR should focus exclusively on FDD duplex mode, presenting technical analysis showing 14-31% resource loss for TDD operation at LEO orbits of 600-1200 km.

Nokia requires that all 6GR devices support GNSS for NTN operation and that 6GR systems support NTN from day one with maximum similarity to the terrestrial network (TN) design. They insist NTN-specific features must only be introduced when strictly necessary, such as UE autonomous pre-compensation of time/Doppler offsets, while enhancements originating from NTN (e.g., timing uncertainty, Doppler offsets, reduced link budget, large round trip time) shall be incorporated into the general 6GR design. Nokia opposes the Rel-18 network verified UE location feature unless it is accurate, trustworthy, and has mandatory UE support. They propose studying extended PDSCH/PUSCH transmission duration to combat HARQ stalling, and studying concurrent SIB1 and NTN access essential SIB scheduling to improve initial access latency and reliability. They calculate TDD efficiency losses of 14-31% for LEO orbits and therefore require that 6GR NTN studies focus on FDD duplex mode.