US 12,414,064 B2
Device-to-device assisted timing synchronization
Ling Yu, Kauniainen (FI); Klaus Hugl, Vienna (AT); Dawid Koziol, Wroclaw (PL); Devaki Chandramouli, Plano, TX (US); and Thomas Haaning Jacobsen, Nørresundby (DK)
Assigned to Nokia Technologies Oy, Espoo (FI)
Appl. No. 18/018,517
Filed by NOKIA TECHNOLOGIES OY, Espoo (FI)
PCT Filed Jul. 28, 2020, PCT No. PCT/US2020/043867
§ 371(c)(1), (2) Date Jan. 27, 2023,
PCT Pub. No. WO2022/025868, PCT Pub. Date Feb. 3, 2022.
Prior Publication US 2023/0284163 A1, Sep. 7, 2023
Int. Cl. H04W 56/00 (2009.01); H04W 72/25 (2023.01)
CPC H04W 56/004 (2013.01) [H04W 72/25 (2023.01)] 18 Claims
OG exemplary drawing
 
1. An apparatus, comprising:
at least one processor; and
at least one memory comprising computer program code,
the at least one memory and computer program code configured, with the at least one processor, to cause the apparatus at least to:
initiate a procedure to determine whether to enable or disable propagation delay (PD) compensation for determining 5G system (5GS) timing within a sidelink (SL) group of user equipment, wherein the apparatus is configured with SL groupcast configuration;
transmit PD information of the apparatus as a SL groupcast message over a SL control channel to at least one of the group of user equipment;
receive at least one of acknowledgement or non-acknowledgement from one or more of the group of user equipment;
determine whether to enable or disable the PD compensation based on the received acknowledgement or non-acknowledgement from the group of user equipment; and
transmit another SL groupcast message over the SL control channel to inform the at least one of the group of user equipment of the determination of whether to enable or disable the PD compensation.