公开(公告)号：US20210100039A1

公开(公告)日：2021-04-01

申请号：US17023317

申请日：2020-09-16

Applicant: Apple Inc.

Inventor： Yushu Zhang ,  Wei Zeng ,  Yuqin Chen ,  Dawei Zhang ,  Fangli Xu ,  Haijing Hu ,  Haitong Sun ,  Hong He ,  Yakun Sun ,  Yuchul Kim

IPC: H04W74/08

Abstract: A device may wirelessly transmit a physical RACH, and a first message on a physical uplink shared channel (PUSCH), in a first step of a 2-step random access channel (RACH) procedure. The device may receive a second message on a physical downlink shared channel in response to successful detection of the first message, in a second step of the 2-step RACH procedure. When detection of the first message is unsuccessful, the device may be instructed to fall back to a 4-step RACH procedure. The device may be configured with one or more first message transmit opportunities (PO), one of which may include one or more PUSCH resource units (PRUs). Some of the communication parameters of the device may be configured to be common for each PO, while other communication parameters may be configured per PRU. Respective new Radio Network Temporary ID values may be defined for the first message and second message.

公开(公告)号：US20210099223A1

公开(公告)日：2021-04-01

申请号：US17002734

申请日：2020-08-25

Applicant: Apple Inc.

Inventor： Yushu Zhang ,  Dawei Zhang ,  Haitong Sun ,  Wei Zeng ,  Hong He ,  Yuchul Kim ,  Chunhai Yao ,  Haijing Hu

IPC: H04B7/08 ,  H04W72/12 ,  H04L5/00

Abstract: Apparatuses, systems, and methods for performing downlink signal reception with antenna panel switching in a wireless communication system. A cellular base station may receive an indication of an antenna panel activation delay from a wireless device. The cellular base station may select a scheduling offset for a transmission to the wireless device based at least in part on the antenna panel activation delay. The scheduling offset may be selected to be at least the length of the antenna panel activation delay if it is expected that the wireless device may perform antenna panel activation to receive the transmission. The cellular base station may schedule the transmission to the wireless device using the selected scheduling offset, and may perform the transmission to the wireless device at the selected scheduling offset after scheduling the transmission to the wireless device.

公开(公告)号：US10966189B2

公开(公告)日：2021-03-30

申请号：US16706911

申请日：2019-12-09

Applicant: Apple Inc.

Inventor： Wei Zeng ,  Yuchul Kim ,  Dawei Zhang

IPC: H04W4/00 ,  H04W72/04 ,  H04L5/00 ,  H04W76/28 ,  H04W56/00 ,  H04W48/16

Abstract: This disclosure relates to techniques for a base station (BS) to configure default and supplementary sync signals (SS) at sub-band bandwidths in a wireless communication system. The supplementary SS may be configured in response to a determination that the BS is in wireless communications with a UE using a single narrow band radio-frequency chain. The BS may configure the supplementary SS to be proximate in frequency to a PDCCH search space currently in use by the UE. The default SS may be configured to support initial access and may have a shorter periodicity, while the supplementary SS may be configured to not support initial access and may have a longer periodicity. The BS may additionally or alternatively configure a tracking reference signal (RS), wherein the tracking RS is configured on-demand based on a current network load of the BS. The tracking RS may be configured at a sub-band bandwidth, wherein the sub-band bandwidth is selected based on a bandwidth allocated to an active UE in wireless communication with the BS.

公开(公告)号：US20210076400A1

公开(公告)日：2021-03-11

申请号：US16950608

申请日：2020-11-17

Applicant: Apple Inc.

Inventor： Dawei Zhang ,  Fangli Xu ,  Haijing Hu ,  Haitong Sun ,  Wei Zeng ,  Yuchul Kim ,  Yuqin Chen

IPC: H04W72/12 ,  H04L5/14 ,  H04W72/04 ,  H04L1/18 ,  H04L5/00 ,  H04W80/08 ,  H04L25/02 ,  H04W74/08 ,  H04W76/27 ,  H04L27/26

Abstract: Apparatuses, systems, and methods for time division multiplexing of uplink communications using a first wireless link with a first radio access technology (RAT) and a second wireless link with a second RAT.

公开(公告)号：US20210050946A1

公开(公告)日：2021-02-18

申请号：US16902656

申请日：2020-06-16

Applicant: Apple Inc.

Inventor： Sriram Subramanian ,  Tarakkumar G. Dhanani ,  Shiva Krishna Narra ,  Sharad Garg ,  Vijay Gadde ,  Madhukar K. Shanbhag ,  Sandeep K. Sunkesala ,  Sree Ram Kodali ,  Haitong Sun ,  Sanjeevi Balasubramanian ,  Vishwanth Kamala Govindaraju ,  Wei Zhang ,  Wei Zeng ,  Dawei Zhang ,  Yuchul Kim ,  Hong He ,  Alosious Pradeep Prabhakar

IPC: H04L1/18 ,  H04W76/15

Abstract: This disclosure relates to methods and devices for transmitting acknowledgment messages on a preferred cell in a carrier aggregation scenario. A user equipment device (UE) establishes a connection with a primary cell and one or more secondary cells, and determines a preferred cell from among the primary cell and the one or more secondary cells based at least in part on one or more quality metrics. The UE may determine the preferred cell at least in part in response to determining that transmission power of the UE has been limited due to a specific absorption rate (SAR) backoff feature of the UE. The UE transmits a notification to a network indicating that the UE intends to transmit an acknowledgement message to the preferred cell, and transmits the acknowledgment message to the preferred cell.

公开(公告)号：US20200281002A1

公开(公告)日：2020-09-03

申请号：US16855851

申请日：2020-04-22

Applicant: Apple Inc.

Inventor： Yang Li ,  Wei Zeng ,  Zhu Ji ,  Beibei Wang ,  Jia Tang ,  Yuchul Kim ,  Haijing Hu ,  Dawei Zhang ,  Xiangying Yang ,  Sami M. Almalfouh ,  Johnson O. Sebeni ,  Wei Zhang ,  Tianyan Pu

IPC: H04W72/12 ,  H04W76/16

Abstract: Apparatuses, systems, and methods for a wireless device to perform simultaneous uplink activity for multiple RATs in the same carrier using frequency division multiplexing. The wireless device may establish a first wireless link with a first base station according to a first radio access technology (RAT) and a second wireless link with a second base station according to a second RAT. The first base station may provide a first cell operating in a first system bandwidth and the second base station may provide a second cell operating in a second system bandwidth. The wireless device may determine whether the wireless device has uplink activity scheduled according to both the first RAT and the second RAT. If so, the wireless device may perform uplink activity for both the first RAT and the second RAT in the first system bandwidth using frequency division multiplexing.

公开(公告)号：US20200260498A1

公开(公告)日：2020-08-13

申请号：US16781337

申请日：2020-02-04

Applicant: Apple Inc.

Inventor： Fangli Xu ,  Dawei Zhang ,  Haijing Hu ,  Yuqin Chen ,  Wei Zeng ,  Haitong Sun ,  Yuchul Kim

IPC: H04W74/08 ,  H04W72/04 ,  H04W52/36

Abstract: Apparatuses, systems, and methods for a wireless device to perform 2-step random access procedures. The disclosure identifies features of 2-step random access procedures including configuration (e.g., under what circumstances to use 2-step vs. 4-step random access), message design, fallback procedures, power ramping, backoff, and retransmission procedures.

公开(公告)号：US10659151B2

公开(公告)日：2020-05-19

申请号：US15898692

申请日：2018-02-19

Applicant: Apple Inc.

Inventor： Yuchul Kim ,  Wei Zeng ,  Xiangying Yang ,  Dawei Zhang ,  Haitong Sun

IPC: H04B7/26 ,  H04W72/04 ,  H04L5/00 ,  H04L5/14 ,  H04W72/12

Abstract: Embodiments are presented herein of apparatuses, systems, and methods for utilizing a flexible slot indicator in wireless communication. A base station (BS) may establish communication with a first user equipment device (UE). The BS may determine a transmission direction for each of a plurality of symbols included in one or more slots. The BS may transmit a slot format indicator (SFI) to the UE. The SFI may indicate the transmission direction for each of the plurality of symbols included in one or more slots. The BS and the UE may perform communication during the one or more slots according to the determined transmission direction.

公开(公告)号：US10601562B2

公开(公告)日：2020-03-24

申请号：US16008880

申请日：2018-06-14

Applicant: Apple Inc.

Inventor： Joonsuk Kim ,  Yuchul Kim

IPC: H04L5/00 ,  H04W56/00 ,  H04L1/12 ,  H04L27/26 ,  H04L1/18 ,  H04L25/02 ,  H04W84/12

Abstract: This disclosure relates to orthogonal frequency division multiple access (OFDMA) communication in wireless local area networks (WLANs). According to some embodiments, a downlink OFDMA frame may be transmitted. An uplink OFDMA frame including acknowledgements associated with the downlink OFDMA frame may be received. The uplink OFDMA frame may be processed, in some instances including determining which devices receiving the downlink OFDMA frame transmitted an acknowledgement associated with the downlink OFDMA frame in the uplink OFDMA frame.

公开(公告)号：US10582503B2

公开(公告)日：2020-03-03

申请号：US16145411

申请日：2018-09-28

Applicant: Apple Inc.

Inventor： Yang Li ,  Haitong Sun ,  Zhu Ji ,  Yuchul Kim ,  Beibei Wang ,  Wei Zhang ,  Wei Zeng ,  Jia Tang ,  Tianyan Pu ,  Sami M. Almalfouh ,  Johnson O. Sebeni ,  Dawei Zhang

IPC: H04B7/02 ,  H04W72/04 ,  H04B7/06 ,  H04B7/08 ,  H04W24/10

Abstract: Apparatuses, systems, and methods for a wireless device to perform user equipment (UE) initiated beam management procedures with a base station or gNB. A wireless device in communication with a 5G base station may detect degradation in the pair of transmit and receive beams between the gNB and the device. The device may select a preferred beam management procedure and indicate the preference to the gNB.