公开(公告)号：US20230300886A1

公开(公告)日：2023-09-21

申请号：US18180696

申请日：2023-03-08

Applicant: MEDIATEK INC.

Inventor： Jing-Wei CHEN ,  Tao CHEN ,  Lung-Sheng TSAI ,  Jun-Qiang CHENG ,  Yih-Shen CHEN

IPC: H04W74/08 ,  H04W72/02

CPC classification number: H04W74/0816 ,  H04W72/02

Abstract: A method can include determining candidate sidelink resources by a user equipment (UE) for sidelink transmission on an unlicensed band from a sidelink resource selection window based on results of a sensing operation on the unlicensed band during a sidelink sensing window, selecting a sidelink resource from the candidate sidelink resources, performing a listen-before-talk (LBT) process on the unlicensed band to obtain a channel occupancy time (COT), and performing a sidelink transmission within the COT using the first sidelink resource. The selection of the sidelink resource can be based on an LBT time that is a predicted duration of a random backoff process of the first LBT process. Also, the first sidelink resource can be selected from the candidate sidelink resources without randomization.

公开(公告)号：US20230309145A1

公开(公告)日：2023-09-28

申请号：US18181207

申请日：2023-03-09

Applicant: MEDIATEK INC.

Inventor： Jing-Wei CHEN ,  Tao CHEN ,  Lung-Sheng TSAI ,  Jun-Qiang CHENG ,  Yih-Shen CHEN

IPC: H04W74/08

CPC classification number: H04W74/0816 ,  H04W16/14

Abstract: A method for performing sidelink transmission over an unlicensed band is provided. The method includes performing a first-type listen-before-talk (LBT) process on the unlicensed band to obtain a channel occupancy time (COT) for the sidelink transmission. The first-type LBT process includes a random backoff process. Duration of the random backoff process is determined by a randomly generated LBT counter. The method further includes determining, based on a result from a sensing operation performed on the unlicensed band within a sensing window, a plurality of candidate sidelink resources on the unlicensed band within a sidelink resource selection window. The method also includes selecting, based on a completion time point of the first-type LBT process, a sidelink resource from the plurality of candidate sidelink resources. The method also includes performing the sidelink transmission within the obtained COT on the selected sidelink resource.

公开(公告)号：US20230354420A1

公开(公告)日：2023-11-02

申请号：US18307168

申请日：2023-04-26

Applicant: MEDIATEK INC.

Inventor： Jing-Wei CHEN ,  Tao CHEN ,  Lung-Sheng TSAI

IPC: H04W74/08 ,  H04W72/25 ,  H04W72/1263 ,  H04W72/51 ,  H04W72/542

CPC classification number: H04W74/0808 ,  H04W72/25 ,  H04W72/1263 ,  H04W72/51 ,  H04W72/542

Abstract: A method is provided, which includes conducting, at a first user equipment (UE), a listen-before-talk (LBT) process on an unlicensed band to obtain a channel occupancy time (COT) for a sidelink transmission; determining, at the first UE, based on channel sensing executed on the unlicensed band, a group of candidate sidelink resources on the unlicensed band, where each candidate side link resource is within a sidelink resource selection window, and does not have reservation that is associated with a Reference Signal Received Power (RSRP) higher than a predetermined resource exclusion RSRP threshold; selecting, at the first UE, a sidelink resource from the group of candidate sidelink resources; and performing, on the selected sidelink resource, the sidelink transmission from the first UE to a second UE, within the obtained COT. Multiple Sidelink Control Information (SCI) messages are decoded at the first UE on a single Physical Sidelink Control Channel (PSCCH) resource.

公开(公告)号：US20230300885A1

公开(公告)日：2023-09-21

申请号：US18180527

申请日：2023-03-08

Applicant: MEDIATEK INC.

Inventor： Jing-Wei CHEN ,  Tao CHEN ,  Lung-Sheng TSAI ,  Jun-Qiang CHENG ,  Yih-Shen CHEN

IPC: H04W74/08 ,  H04W72/02

CPC classification number: H04W74/0816 ,  H04W72/02

Abstract: A method can include determining candidate sidelink resources by a user equipment (UE) for sidelink transmission on an unlicensed band from a sidelink resource selection window based on results of a sensing operation on the unlicensed band during a sidelink sensing window, selecting a sidelink resource from the candidate sidelink resources, performing a listen-before-talk (LBT) process on the unlicensed band to obtain a channel occupancy time (COT), and performing a sidelink transmission within the COT using the first sidelink resource. The selection of the sidelink resource can be based on an LBT time that is a predicted duration of a random backoff process of the first LBT process. Also, the first sidelink resource can be selected from the candidate sidelink resources without randomization.