US 12,192,989 B2
Methods and apparatus for scheduling in uplink
Henrik Sahlin, Mölnlycke (SE); Jingya Li, Gothenburg (SE); Helka-Liina Määttanen, Helsinki (FI); Ying Sun, Sundbyberg (SE); and Gustav Wikström, Täby (SE)
Assigned to TELEFONAKTIEBOLAGET LM ERICSSON (PUBL), Stockholm (SE)
Filed by Telefonaktiebolaget LM Ericsson (publ), Stockholm (SE)
Filed on Jul. 17, 2020, as Appl. No. 16/931,528.
Application 16/931,528 is a continuation of application No. 15/559,457, granted, now 10,757,724, previously published as PCT/SE2016/051065, filed on Oct. 31, 2016.
Claims priority of provisional application 62/250,183, filed on Nov. 3, 2015.
Prior Publication US 2020/0351920 A1, Nov. 5, 2020
This patent is subject to a terminal disclaimer.
Int. Cl. H04W 72/1268 (2023.01); H04L 5/00 (2006.01); H04W 72/21 (2023.01); H04W 72/23 (2023.01)
CPC H04W 72/1268 (2013.01) [H04L 5/0048 (2013.01); H04W 72/21 (2023.01); H04W 72/23 (2023.01)] 8 Claims
OG exemplary drawing
 
1. A method performed by a User Equipment (UE) configured for operation in a wireless communication network that is based on an uplink signal structure that defines transmission subframes divided into Orthogonal Frequency Division Multiplexing (OFDM) symbols, the method comprising:
receiving an uplink grant from a Base Station (BS) of the wireless communication network, the uplink grant scheduling an uplink transmission by the UE that is based on a short Transmission Time Interval (TTI) having a duration in number of OFDM symbols that is less than one transmission subframe, the duration being dynamically configured by the BS for the uplink grant;
determining, from uplink scheduling information contained in the uplink grant, the dynamically configured duration of the short TTI and a position of one or more OFDM symbols within uplink resources allocated for the short TTI by the uplink grant for transmission of Demodulation Reference Symbols (DMRS); and
performing the scheduled uplink transmission on the allocated uplink resources, according to the determined duration of the short TTI and the determined position of the one or more OFDM symbols for the transmission of DMRS.