US 12,170,574 B2
Method and apparatus for HARQ-ACK retransmission
Haipeng Lei, Beijing (CN); and Alexander Golitschek Edler Von Elbwart, Darmstadt (DE)
Assigned to Lenovo (Beijing) Limited, Beijing (CN)
Appl. No. 17/608,094
Filed by LENOVO (BEIJING) LIMITED, Beijing (CN)
PCT Filed May 10, 2019, PCT No. PCT/CN2019/086458
§ 371(c)(1), (2) Date Nov. 1, 2021,
PCT Pub. No. WO2020/227863, PCT Pub. Date Nov. 19, 2020.
Prior Publication US 2022/0294573 A1, Sep. 15, 2022
Int. Cl. H04L 1/1829 (2023.01); H04L 1/1607 (2023.01); H04L 1/1812 (2023.01)
CPC H04L 1/1854 (2013.01) [H04L 1/1621 (2013.01); H04L 1/1671 (2013.01); H04L 1/1812 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A method for wireless communications by a user equipment, the method comprising:
receiving a first group of downlink transmissions;
transmitting a first hybrid automatic repeat request acknowledgement codebook for the first group of downlink transmissions in response to channel access procedure for transmitting the first hybrid automatic repeat request acknowledgement codebook being successful;
receiving a second group of downlink transmissions;
determining whether to retransmit hybrid automatic repeat request acknowledgement feedback for the first group of downlink transmissions;
transmitting a combined hybrid automatic repeat request acknowledgement codebook in response to determining to retransmit the hybrid automatic repeat request acknowledgement feedback for the first group of downlink transmissions and channel access procedure for transmitting the combined hybrid automatic repeat request acknowledgement codebook being successful, wherein the combined hybrid automatic repeat request acknowledgement codebook includes a first sub-codebook corresponding to the first group of downlink transmissions and a second sub-codebook corresponding to the second group of downlink transmissions; and
transmitting a second hybrid automatic repeat request acknowledgement codebook for the second group of downlink transmissions in response to determining not to retransmit the hybrid automatic repeat request acknowledgement feedback for the first group of downlink transmissions and channel access procedure for transmitting the second hybrid automatic repeat request acknowledgement codebook being successful.