US 12,407,468 B2
Coupled downlink and uplink reference signals for efficient multi-RTT positioning
Ping-Heng Kuo, London (GB); and Diomidis Michalopoulos, Munich (DE)
Assigned to NOKIA TECHNOLOGIES OY, Espoo (FI)
Appl. No. 17/998,385
Filed by Nokia Technologies Oy, Espoo (FI)
PCT Filed May 14, 2020, PCT No. PCT/EP2020/063455
§ 371(c)(1), (2) Date Nov. 10, 2022,
PCT Pub. No. WO2021/228394, PCT Pub. Date Nov. 18, 2021.
Prior Publication US 2023/0188290 A1, Jun. 15, 2023
Int. Cl. H04L 5/00 (2006.01); H04W 64/00 (2009.01)
CPC H04L 5/0051 (2013.01) [H04W 64/00 (2013.01)] 17 Claims
OG exemplary drawing
 
1. A terminal device comprising:
at least one processor; and
at least one memory including computer program code;
the at least one memory and the computer program code configured, with the at least one processor, to cause the terminal device at least to perform:
maintaining, in the memory, a configuration of a downlink reference signal and a configuration of an uplink reference signal;
receiving a configuration of a coupling relationship between the downlink reference signal and the uplink reference signal from an access node;
storing the configuration of the coupling relationship to the memory;
measuring, in response to receiving the downlink reference signal from the access node according to the configuration of the downlink reference signal, the downlink reference signal;
determining, based on results of the measuring, whether a radio channel between the terminal device and the access node meets one or more pre-defined criteria;
in response to determining that the radio channel fails to meet the one or more pre-defined criteria, determining an adjusted transmission mode for the uplink reference signal coupled to the downlink reference signal based on the configuration of the coupling relationship, wherein the adjusted transmission mode determines one or more transmission parameters to be used for transmitting the uplink reference signal or results in a cancellation of a transmission of the uplink reference signal; and
in response to the adjusted transmission mode determining the one or more transmission parameters, transmitting the uplink reference signal to the access node using the adjusted transmission mode.