US 11,716,634 B2
Network node, method and computer program for unlicensed spectrum operation
Peter Alriksson, Hörby (SE); Tai Do, Lund (SE); Reem Karaki, Aachen (DE); and Thomas Nilsson, Malmö (SE)
Assigned to Telefonaktiebolaget LM Ericsson (Publ), Stockholm (SE)
Filed by Telefonaktiebolaget LM Ericsson (publ), Stockholm (SE)
Filed on Jul. 7, 2022, as Appl. No. 17/859,737.
Application 17/859,737 is a continuation of application No. 16/767,705, granted, now 11,418,964, previously published as PCT/EP2018/085970, filed on Dec. 19, 2018.
Claims priority of provisional application 62/609,072, filed on Dec. 21, 2017.
Prior Publication US 2022/0345897 A1, Oct. 27, 2022
This patent is subject to a terminal disclaimer.
Int. Cl. H04W 16/14 (2009.01); H04W 74/08 (2009.01); H04B 7/0413 (2017.01); H04L 1/18 (2023.01); H04L 1/1812 (2023.01); H04L 1/1867 (2023.01)
CPC H04W 16/14 (2013.01) [H04B 7/0413 (2013.01); H04L 1/1812 (2013.01); H04L 1/1887 (2013.01); H04W 74/0808 (2013.01)] 19 Claims
OG exemplary drawing
 
1. A network node arranged to provide communication at least in an unlicensed band where clear channel assessment (CCA) is required before transmissions, wherein the unlicensed band comprises a plurality of carriers, or sets of carriers, defining channels, the network node comprising:
a processor configured to:
prepare code block groups comprising code blocks from transport blocks, which transport blocks each comprises a payload intended for a respective receiver, wherein each code block comprises a checksum enabling a hybrid automatic repeat request (HARQ) procedure on a per code block group basis;
map the code block groups to a wideband signal comprising a consecutive set of channels on the carriers of the unlicensed band;
assess whether the channels, respectively, are clear, and transmit the code block groups mapped on the channels which are clear and omit transmissions of code block groups mapped on channels that are not clear, wherein the assessment and the transmissions are performed within a first time interval; and
transmit code blocks groups omitted to be transmitted using the HARQ procedure for retransmission prior receiving a non-acknowledgement (NAK) from a respective receiver of the code block group.