US 12,137,484 B2
Methods, apparatus and machine-readable media relating to wireless transmission in a communication network
Sebastian Max, Cologne (DE); Miguel Lopez, Solna (SE); Dennis Sundman, Sollentuna (SE); and Leif Wilhelmsson, Lund (SE)
Assigned to TELEFONAKTIEBOLAGET LM ERICSSON (PUBL), Stockholm (SE)
Appl. No. 17/626,022
Filed by Telefonaktiebolaget LM Ericsson (publ), Stockholm (SE)
PCT Filed Apr. 24, 2020, PCT No. PCT/EP2020/061551
§ 371(c)(1), (2) Date Jan. 10, 2022,
PCT Pub. No. WO2021/008746, PCT Pub. Date Jan. 21, 2021.
Claims priority of provisional application 62/873,344, filed on Jul. 12, 2019.
Prior Publication US 2022/0256596 A1, Aug. 11, 2022
Int. Cl. H04W 74/08 (2024.01); H04L 1/00 (2006.01); H04L 5/00 (2006.01); H04W 72/0446 (2023.01); H04W 74/0808 (2024.01); H04W 74/0833 (2024.01)
CPC H04W 74/085 (2013.01) [H04L 1/0003 (2013.01); H04L 5/0053 (2013.01); H04W 72/0446 (2013.01); H04W 74/0808 (2013.01); H04W 74/0866 (2013.01)] 24 Claims
OG exemplary drawing
 
1. A method performed by a wireless transmitting device for a communication network, the communication network implementing a standard in which transmitting devices contend for access to a wireless transmission medium, a transmitting device being permitted to transmit using the wireless transmission medium for a window of time upon winning contention, the method comprising:
initiating a first, initial transmission to one or more wireless receiving devices in the window of time, the first transmission comprising a first preamble and user data, wherein the first preamble comprises one or more signalling fields indicating one or more of: a modulation and coding scheme of the first transmission; and a duration of the first transmission;
receiving at least one acknowledgement message from the one or more wireless receiving devices, wherein the at least one acknowledgement message identifies user data that was not correctly received; and
subsequent to the first transmission, initiating a second transmission to the one or more wireless receiving devices in the window of time, the second transmission comprising a second preamble which is shorter than the first preamble, or comprising no preamble, and wherein the second transmission further comprises a re-transmission of user data that was not correctly received.