公开(公告)号：US11864229B2

公开(公告)日：2024-01-02

申请号：US17257716

申请日：2019-08-07

Applicant: Apple Inc.

Inventor： Salvatore Talarico ,  Jeongho Jeon ,  Gang Xiong ,  Yingyang Li ,  Carlos Aldana

IPC: H04W74/08 ,  H04W16/14 ,  H04W72/04 ,  H04L1/18 ,  H04L1/1812 ,  H04W72/23

CPC classification number: H04W74/0808 ,  H04L1/1812 ,  H04W16/14 ,  H04W72/23

Abstract: Systems and methods of adjusting contention window size (CWS) in a LBT procedure for both UL and DL unlicensed spectrum transmissions are described. The UE makes a HARQ-ACK determination for at least one code block group (CBG) of a transport block (TB) in a reference burst from a base station, determines whether the HARQ-ACK determination for the CBG meets a predetermined number of NACKs, transmits to the base station a single bit HARQ-ACK feedback for the TB that is dependent on whether the predetermined number of NACKs has been met, and receives or determines the adjusted CWS and uses the adjusted CWS for communication with the base station.

公开(公告)号：US11696224B2

公开(公告)日：2023-07-04

申请号：US17583929

申请日：2022-01-25

Applicant: Apple Inc.

Inventor： Salvatore Talarico ,  Carlos Aldana ,  Bishwarup Mondal ,  Jeongho Jeon ,  Dae Won Lee

IPC: H04W48/16 ,  H04L5/00 ,  H04W56/00 ,  H04W72/30

CPC classification number: H04W48/16 ,  H04L5/0048 ,  H04W56/001 ,  H04W72/30

Abstract: Systems and methods of providing timing information for initial access in an unlicensed band are described. A UE monitors a new radio discovery signal (NRDS-U) window in an unlicensed band for a DRS transmission that is constrained to be transmitted within the NRDS-U window. The UE determines initial access information, including an offset that indicates when the DRS transmission occurs within the NRDS-U window, and engages in initial access dependent on the offset. The offset is from a radio frame or half radio frame boundary or the start of the NRDS-U window. The offset is indicated in three least/most significant bits an SSB index or from an sl-offset field in a MIB of the SSB. When the base station uses a DFS channel, the base station transmits a periodic signal to emulate a radar signal.

公开(公告)号：US20220150802A1

公开(公告)日：2022-05-12

申请号：US17583929

申请日：2022-01-25

Applicant: Apple Inc.

Inventor： Salvatore Talarico ,  Carlos Aldana ,  Bishwarup Mondal ,  Jeongho Jeon ,  Dae Won Lee

IPC: H04W48/10 ,  H04W56/00 ,  H04L5/00

Abstract: Systems and methods of providing timing information for initial access in an unlicensed band are described. A UE monitors a new radio discovery signal (NRDS-U) window in an unlicensed band for a DRS transmission that is constrained to be transmitted within the NRDS-U window. The UE determines initial access information, including an offset that indicates when the DRS transmission occurs within the NRDS-U window, and engages in initial access dependent on the offset. The offset is from a radio frame or half radio frame boundary or the start of the NRDS-U window. The offset is indicated in three least/most significant bits an SSB index or from an sl-offset field in a MIB of the SSB. When the base station uses a DFS channel, the base station transmits a periodic signal to emulate a radar signal.

公开(公告)号：US11259238B2

公开(公告)日：2022-02-22

申请号：US16515704

申请日：2019-07-18

Applicant: Apple Inc.

Inventor： Salvatore Talarico ,  Carlos Aldana ,  Bishwarup Mondal ,  Jeongho Jeon ,  Dae Won Lee

IPC: H04W48/16 ,  H04L5/00 ,  H04W56/00 ,  H04W72/00

Abstract: Systems and methods of providing timing information for initial access in an unlicensed band are described. A UE monitors a new radio discovery signal (NRDS-U) window in an unlicensed band for a DRS transmission that is constrained to be transmitted within the NRDS-U window. The UE determines initial access information, including an offset that indicates when the DRS transmission occurs within the NRDS-U window, and engages in initial access dependent on the offset. The offset is from a radio frame or half radio frame boundary or the start of the NRDS-U window. The offset is indicated in three least/most significant bits an SSB index or from an sl-offset field in a MIB of the SSB. When the base station uses a DFS channel, the base station transmits a periodic signal to emulate a radar signal.