公开(公告)号：US20230239924A1

公开(公告)日：2023-07-27

申请号：US17441267

申请日：2020-10-16

Applicant: Apple Inc.

Inventor： Oghenekome YAO ,  Yushu ZHANG ,  Huaning NIU ,  Weidong YANG ,  Sigen YE ,  Haitong SUN ,  Chuxuan YE ,  Chunhai YAO ,  Hong HE ,  Wei ZENG ,  Dawei ZHANG

IPC: H04W74/08 ,  H04W74/04 ,  H04L5/00 ,  H04W76/19

CPC classification number: H04W74/0816 ,  H04W74/04 ,  H04L5/0051 ,  H04W76/19

Abstract: Beam determination refers to a set of procedures for an access node (AN) and a user equipment (UE) to select from among downlink communication beams and/or uplink communication beams for downlink and/or uplink communications, respectively. Often times, the downlink communication beams can include one or more downlink control channels, for example, a Physical Downlink Control Channel (PDCCH) and/or a Physical Downlink Shared Channel (PDSCH), to provide downlink reference signals, such as channel-state information reference signals (CSI-RSs), to the UE. The AN can execute various exemplary downlink beam scheduling procedures to control the transmission of the downlink reference signals, such as the CSI-RSs to provide an example, over the downlink communication beams. In some embodiments, the UE can utilize the CSI-RSs to perform beamforming failure detection (BFD) and beamforming failure recovery (BFR) in the wireless networks.

公开(公告)号：US20230239928A1

公开(公告)日：2023-07-27

申请号：US17442535

申请日：2020-10-16

Applicant: Apple Inc.

Inventor： Oghenekome OTERI ,  Huaning NIU ,  Weidong YANG ,  Sigen YE ,  Haitong SUN ,  Chuxuan YE ,  Chunhai YAO ,  Hong HE ,  Wei ZENG ,  Dawei ZHANG

IPC: H04W74/08

CPC classification number: H04W74/0825

Abstract: Current 5G provisions for wireless communications do not allow for the differentiation of channel access by User Equipments (UEs) with different priorities. Approaches are described by which priority access for UEs in a controlled environment using frame based equipment (FBE), and in particular for different UEs or the same UE that has different configured grants. The approaches are particularly helpful for ultra-reliable low-latency communication (URLLC) UEs. In one approach, the UE performs a clear channel assessment (CCA) in an idle period before the fixed frame period (FFP), followed by a channel access priority test. In an alternative approach, the UE performs a channel access priority test before the UE performs a clear channel assessment (CCA) in an idle period before the fixed frame period (FFP). Other approaches include setting the fixed frame period length to different sizes for each UE, using a random number of skipped fixed frame periods, and the gNB configuring UEs with multiple semi-static channel access mode parameters.