US 11,863,326 B2
Base stations and methods
Toshizo Nogami, Sakai (JP); Daiichiro Nakashima, Sakai (JP); Shoichi Suzuki, Sakai (JP); Wataru Ouchi, Sakai (JP); Tomoki Yoshimura, Sakai (JP); Taewoo Lee, Sakai (JP); and Huifa Lin, Sakai (JP)
Assigned to SHARP KABUSHIKI KAISHA, Sakai (JP)
Appl. No. 17/261,729
Filed by SHARP KABUSHIKI KAISHA, Sakai (JP)
PCT Filed Jul. 24, 2019, PCT No. PCT/JP2019/030105
§ 371(c)(1), (2) Date Jan. 20, 2021,
PCT Pub. No. WO2020/022523, PCT Pub. Date Jan. 30, 2020.
Claims priority of application No. 2018-140285 (JP), filed on Jul. 26, 2018.
Prior Publication US 2021/0344448 A1, Nov. 4, 2021
Int. Cl. H04L 1/1812 (2023.01); H04L 5/00 (2006.01); H04W 72/1273 (2023.01)
CPC H04L 1/1812 (2013.01) [H04L 5/0055 (2013.01); H04W 72/1273 (2013.01)] 6 Claims
OG exemplary drawing
 
1. A base station which communicates with a user equipment (UE), the base station comprising:
higher layer processing circuitry configured to send first radio resource control (RRC) configuration information and second RRC configuration information, the first RRC configuration information indicating that Physical Downlink Shared Channel Hybrid Automatic Repeat Request-Acknowledgment (PDSCH HARQ-ACK) codebook is semi static, and the second RRC configuration information indicating that a maximum number of codewords scheduled by Downlink Control Information (DCI) is two;
transmitting circuitry configured to, after a channel access procedure, transmit, to the UE, a PDSCH which contains only a first transport block; and
receiving circuitry configured to receive, from the UE, a HARQ-ACK feedback including at least a first HARQ-ACK information bit and a second HARQ-ACK information bit, the first HARQ-ACK information bit corresponding to the first transport block of the PDSCH;
wherein
the second HARQ-ACK information bit is set to Negative ACK (NACK), and
a contention window for a channel access procedure is adjusted using the HARQ-ACK feedback, wherein the second HARQ-ACK information bit is ignored.