US 12,328,670 B2
Method and wireless communication device exploiting additional reference symbols in idle mode for power saving
Sina Maleki, Malmö (SE); Ali Nader, Malmö (SE); Andres Reial, Malmö (SE); and Gang Zou, Lund (SE)
Assigned to Telefonaktiebolaget LM Ericsson (Publ), Stockholm (SE)
Appl. No. 17/799,088
Filed by Telefonaktiebolaget LM Ericsson (publ), Stockholm (SE)
PCT Filed Feb. 9, 2021, PCT No. PCT/EP2021/053064
§ 371(c)(1), (2) Date Aug. 11, 2022,
PCT Pub. No. WO2021/160604, PCT Pub. Date Aug. 19, 2021.
Claims priority of provisional application 62/976,441, filed on Feb. 14, 2020.
Prior Publication US 2023/0073100 A1, Mar. 9, 2023
Int. Cl. H04W 52/02 (2009.01); H04L 5/00 (2006.01)
CPC H04W 52/0212 (2013.01) [H04L 5/0053 (2013.01); H04W 52/0229 (2013.01)] 16 Claims
OG exemplary drawing
 
1. A method performed in a wireless communication device for power savings in a wireless communication system, transmissions of a first set of reference symbols, RSs, and a second set of RSs are provided in the wireless communication system, the method comprising:
obtaining information on the transmission of the second set of RSs, obtaining information on the transmission of the second set of RSs comprising receiving the information from a network node;
determining which RS to use for idle mode tasks based on the obtained information on the transmission of the second set of RSs, determining which RS to use for idle mode tasks comprising determining RS utilization sequences for idle mode tasks by comparing the total energy consumption of the utilization sequences of the first and second sets of RSs;
taking operating parameters into consideration when determining RS utilization sequences, the operating parameters comprising any one of: validity of available idle mode measurement, automatic gain control, AGC, estimate, from previous wake-up, validity of current idle mode measurement, automatic frequency control, AFC, timing estimate, signal quality of the available RS; and
the first set of RSs being provided periodically, and the second set of RSs being provided in any of periodic, semi-persistent or aperiodic transmission patterns.