公开(公告)号：US11546940B2

公开(公告)日：2023-01-03

申请号：US16960911

申请日：2019-01-10

Applicant: IDAC HOLDINGS, INC.

Inventor： Ahmad Reza Hedayat ,  Oghenekome Oteri ,  Hanqing Lou ,  Mahmoud Taherzadeh Boroujeni ,  Xiaofei Wang ,  Rui Yang ,  Shahrokh Nayeb Nazar

IPC: H04W74/08 ,  H04L5/00 ,  H04W72/04 ,  H04W72/12 ,  H04W52/34 ,  H04W16/14

Abstract: Methods, systems, and devices for channel access and listen-before-talk approaches for new radio operation in unlicensed bands and/or licensed bands. A gNB and a wireless transmit/receive unit (WTRU) may operate in unlicensed spectrum. The gNB may perform listen-before-talk operation, and when successful, may send a downlink control channel with a slot format indication (SFI) to the WTRU. There may also be a handshaking procedure with an exchange of a request to transmit (RTT) and a request to receive (RTR). Prior to receiving the downlink channel, the WTRU may monitor search spaces at a first level, and once the downlink channel is received the WTRU may monitor search spaces at a second level. At the end of transmission, the WTRU may revert back to monitoring search spaces at the first level. In one example, the first level may be a mini-slot level and the second level may be a slot level.

公开(公告)号：US20190357222A1

公开(公告)日：2019-11-21

申请号：US16475818

申请日：2018-01-05

Applicant: IDAC HOLDINGS, INC.

Inventor： Hanqing Lou ,  Xiaofei Wang ,  Rui Yang ,  Mihaela C. Beluri ,  Janet A. Stern-Berkowitz

IPC: H04W72/08 ,  H04L5/00 ,  H04W74/08 ,  H04W4/70

Abstract: A wireless transmit/receive unit (WTRU) may receive a grant-less (GL) transmission configuration that may include a first indication of a first set of resource blocks (RBs) for a first resource pool and a second indication of a second set of RBs for a second resource pool. The WTRU may select a subset of RBs in the first set, determine a subset of RBs in the second set based on the selected subset of RBs in the first set, and transmit UL data to the base station via the determined subset of RBs in the second set. The WTRU may receive a negative acknowledgement (NAK) with a third indication for at least one of a first transmission failure reason and a second transmission reason. The WTRU may adjust a backoff and determine a retransmission scheme based on the received third indication, and retransmit the UL data.

公开(公告)号：US20210368541A1

公开(公告)日：2021-11-25

申请号：US16960911

申请日：2019-01-10

Applicant: IDAC HOLDINGS, INC.

Inventor： Ahmad Reza Hedayat ,  Oghenekome Oteri ,  Hanqing Lou ,  Mahmoud Taherzadeh Boroujeni ,  Xiaofei Wang ,  Rui Yang ,  Shahrokh Nayeb Nazar

IPC: H04W74/08 ,  H04L5/00 ,  H04W72/04

Abstract: Methods, systems, and devices for channel access and listen-before-talk approaches for new radio operation in unlicensed bands and/or licensed bands. A gNB and a wireless transmit/receive unit (WTRU) may operate in unlicensed spectrum. The gNB may perform listen-before-talk operation, and when successful, may send a downlink control channel with a slot format indication (SFI) to the WTRU. There may also be a handshaking procedure with an exchange of a request to transmit (RTT) and a request to receive (RTR). Prior to receiving the downlink channel, the WTRU may monitor search spaces at a first level, and once the downlink channel is received the WTRU may monitor search spaces at a second level. At the end of transmission, the WTRU may revert back to monitoring search spaces at the first level. In one example, the first level may be a mini-slot level and the second level may be a slot level

公开(公告)号：US20210168819A1

公开(公告)日：2021-06-03

申请号：US17108642

申请日：2020-12-01

Applicant: IDAC HOLDINGS, INC.

Inventor： Hanqing Lou ,  Xiaofei Wang ,  Rui Yang ,  Mihaela C. Beluri ,  Janet A. Stern-Berkowitz

IPC: H04W72/08 ,  H04W4/70 ,  H04L5/00 ,  H04W74/08

Abstract: A wireless transmit/receive unit (WTRU) may receive configuration information for a first set of resources and a second set of resources for a grantless physical uplink shared channel (PUSCH) transmission. The WTRU may determine data for transmission using the grantless PUSCH transmission. Based on the data, the WTRU may select resources from the first set or the second set for the grantless PUSCH transmission. Further, the WTRU may send the grantless PUSCH transmission including the data using the selected resources. In an example, the sending of the grantless PUSCH transmission may be part of a random access procedure. The random access procedure may be a two-step random access procedure. The random access procedure may be a random access channel (RACH) procedure. The random access procedure may depend upon a double contention pool setting, and the setting may address at least one of a data pool or a control pool.