US 11,889,448 B2
Preconfigured uplink resources—configuration for TA validity in entire cell
Andreas Höglund, Solna (SE); Gerardo Agni Medina Acosta, Märsta (SE); Sandeep Narayanan Kadan Veedu, Täby (SE); and Emre Yavuz, Stockholm (SE)
Assigned to Telefonaktiebolaget LM Ericsson (publ), Stockholm (SE)
Appl. No. 17/599,285
Filed by Telefonaktiebolaget LM Ericsson (publ), Stockholm (SE)
PCT Filed Mar. 27, 2020, PCT No. PCT/IB2020/052970
§ 371(c)(1), (2) Date Sep. 28, 2021,
PCT Pub. No. WO2020/201971, PCT Pub. Date Oct. 8, 2020.
Claims priority of provisional application 62/826,580, filed on Mar. 29, 2019.
Prior Publication US 2022/0159604 A1, May 19, 2022
Int. Cl. H04W 56/00 (2009.01)
CPC H04W 56/0045 (2013.01) 19 Claims
OG exemplary drawing
 
1. A method performed by a wireless device of a cellular communications system to determine timing advance, TA, validity, the method comprising:
obtaining a TA for a cell of the cellular communications system;
determining that none of a predefined set of TA validation mechanisms are configured, wherein:
each TA validation mechanism comprises a TA validation functionality of the wireless device that corresponds to one or more configuration parameters within an information element (IE) transmitted to the wireless device and operates according to the one or more configuration parameters; and
determining that none of the predefined set of TA validation mechanisms are configured comprises determining, for each TA validation mechanism of the predefined set of TA validation mechanism, that the one or more configuration parameters are absent from the IE or indicate that the TA validation mechanism is not to be performed by the wireless device; and
responsive to determining that none of the predefined set of TA validation mechanisms are configured, determining that the TA is valid for an entirety of the cell.