公开(公告)号：US11177904B2

公开(公告)日：2021-11-16

申请号：US16478813

申请日：2018-03-22

Applicant: Apple Inc.

Inventor： Yushu Zhang ,  Gang Xiong ,  Alexei Davydov ,  Guotong Wang

IPC: H04L1/00 ,  H04L5/00 ,  H04W72/04

Abstract: Described is an apparatus of an Evolved Node-B (eNB) operable to communicate with a User Equipment (UE) on a wireless network. The apparatus may comprise a first circuitry and a second circuitry. The first circuitry may be operable to determine a presence of a Phase Tracking Reference Signal (PT-RS) and a density of the PT-RS. The second circuitry may be operable to process the PT-RS. The second circuitry may also be operable to process a transmission in a Multi-User Superposition Transmission (MUST) operation in accordance with the PT-RS.

公开(公告)号：US11063652B2

公开(公告)日：2021-07-13

申请号：US16487155

申请日：2018-03-05

Applicant: Apple Inc.

Inventor： Gang Xiong ,  Yushu Zhang ,  Alexei Davydov ,  Wook Bong Lee ,  Dae Won Lee ,  Guotong Wang

IPC: H04B7/06 ,  H04B1/7143 ,  H04B7/0413 ,  H04B7/08 ,  H04J13/00 ,  H04L5/00 ,  H04W48/16 ,  H04W72/04 ,  H04W72/08 ,  H04B1/715

Abstract: Techniques discussed herein can facilitate maintenance and/or recovery of BPL(s) (Beam Pair Link(s)). Various embodiments can employ aspects discussed herein can one or more of enable interference randomization for beam/link recovery signal(s) or reduce the overhead of UL (Uplink) beam management RS (Reference Signal(s)). Various embodiments can comprise UE(s) (User Equipment(s)) that can receive configuration signaling configuring the UE(s) to one or more of apply interference randomization to a beam/link recovery signal and/or generate a SR (Scheduling Request) channel for beam maintenance having reduced overhead and can transmit the beam/link recovery signal and/or SR channel. Additional embodiments can comprise gNB(s) (next Generation NodeB(s)) that can configure UE(s) for beam maintenance and/or recovery techniques discussed herein.

公开(公告)号：US20210212082A1

公开(公告)日：2021-07-08

申请号：US17269307

申请日：2019-09-24

Applicant: Apple Inc.

Inventor： Guotong Wang ,  Yushu Zhang ,  Gang Xiong ,  Alexei Davydov

IPC: H04W72/12 ,  H04B7/06 ,  H04W76/18 ,  H04W76/15

Abstract: Techniques discussed herein can facilitate determination of spatial (and/or beam) assumption(s) for PDSCH (Physical Downlink Shared Channel) transmitted after a BFR (Beam Failure Recovery) request but before TCI (Transmission Configuration Information) reconfiguration. One example embodiment can be an apparatus configured to: generate a BFR request that indicates a new candidate beam; process a CORESET (Control Resource Set)-BFR of a set of configured CORESETs, wherein the CORESET-BFR comprises a response to the BFR request; determine a spatial assumption for a first PDSCH based on the BFR request, wherein the first PDSCH is scheduled by a first CORESET of the set of configured CORESETs, wherein the first CORESET is different than the CORESET-BFR, wherein the first PDSCH is scheduled before a TCI state is one of reconfigured, reactivated, or re-indicated; and process the first PDSCH based on the determined spatial assumption for the first PDSCH.

公开(公告)号：US20210168011A1

公开(公告)日：2021-06-03

申请号：US16645360

申请日：2018-09-06

Applicant: Apple Inc.

Inventor： Alexei Vladimirovich Davydov ,  Guotong Wang ,  Gang Xiong ,  Yushu Zhang

IPC: H04L27/26 ,  H04L1/18 ,  H04L5/00 ,  H04L1/00 ,  H04W72/04

Abstract: A user equipment (UE) can include processing circuitry configured to decode downlink control information (DCI) from a base station, the DCI including a modulation coding scheme (MCS) index and physical uplink shared channel (PUSCH) allocation. A demodulation reference signal (DM-RS) is encoded for transmission to the base station within a plurality of DM-RS symbols based on the PUSCH allocation. A phase tracking reference signal (PT-RS) time domain density is determined based on the MCS index and a number count of the DM-RS symbols for the DM-RS transmission. The PT-RS is encoded for transmission using a plurality of PT-RS symbols based on the determined time domain density. The plurality of symbols includes one or both of front-loaded DM-RS symbols and additional DM-RS symbols.

公开(公告)号：US10924175B2

公开(公告)日：2021-02-16

申请号：US16489913

申请日：2018-04-02

Applicant: Apple Inc.

Inventor： Guotong Wang ,  Yushu Zhang ,  Alexei Davydov ,  Gang Xiong

IPC: H04B7/06 ,  H04B17/318 ,  H04B7/08 ,  H04W52/36 ,  H04W72/04 ,  H04W72/08

Abstract: Network devices and systems in 5G and new radio (NR) infrastructures can utilize beam management operations to ensure communications for beam management procedure triggering including beam reporting, even during fall-back mode when the current receive (Rx) beam for downlink (DL) and transmit (Tx) beam for uplink (UL) fail. Additionally, reduction in overhead can be achieved with a reference beam pair link based beam reporting in a fall-back mode or not. This beam reporting can be a group based beam reporting and based on Reference Signal Received Powers (RSRPs) of beams and a differential RSRP corresponding thereto.

公开(公告)号：US10863494B2

公开(公告)日：2020-12-08

申请号：US16252294

申请日：2019-01-18

Applicant: Apple Inc.

Inventor： Yushu Zhang ,  Alexei Davydov ,  Guotong Wang ,  Gang Xiong ,  Hong He

IPC: H04W72/04 ,  H04L5/00

Abstract: Systems, apparatuses, methods, and computer-readable media are provided for time domain resource allocations in wireless communications systems. Disclosed embodiments include time-domain symbol determination and/or indication using a combination of higher layer and downlink control information signaling for physical downlink shared channel and physical uplink shared channel; time domain resource allocations for mini-slot operations; rules for postponing and dropping for multiple mini-slot transmission; and collision handling of sounding reference signals with semi-statically or semi-persistently configured uplink transmissions. Other embodiments may be described and/or claimed.

公开(公告)号：US12170563B2

公开(公告)日：2024-12-17

申请号：US17437804

申请日：2020-05-08

Applicant: Apple Inc.

Inventor： Guotong Wang ,  Yushu Zhang ,  Alexei Davydov ,  Gang Xiong

IPC: H04W76/19 ,  H04B7/06 ,  H04B7/08 ,  H04L5/00 ,  H04W56/00

Abstract: Apparatuses, systems, and methods for providing beam information for secondary cell beam failure recovery in a wireless communication system. A wireless device and a cellular base station may establish a wireless link, according to which the wireless device may be configured to communicate using a primary cell and a secondary cell. The wireless device may detect beam failure on the secondary cell. The wireless device may send an indication of the beam failure recovery to the cellular base station. The wireless device may receive information configuring candidate transmit beam reference signals for performing beam recovery on the secondary cell. The wireless device may perform beam identification and report on any new transmit beam(s) identified by the wireless device.

公开(公告)号：US12155444B2

公开(公告)日：2024-11-26

申请号：US17428491

申请日：2020-02-13

Applicant: Apple Inc.

Inventor： Yushu Zhang ,  Alexei Davydov ,  Gang Xiong ,  Guotong Wang

IPC: H04W72/04 ,  H04B7/06 ,  H04L5/00 ,  H04W52/36 ,  H04W56/00 ,  H04W76/19

Abstract: Disclosed herein are system, method, and computer program product embodiments for performing beam selection. An embodiment operates by receiving, from a base station, a request for a report for at least one uplink beam. In response, the embodiment generates the report for the at least one uplink beam. The report for the at least one uplink beam can include an indication that a resource corresponding to the at least one uplink beam is available for uplink beam indication. The resource can be a Synchronization Signal Block (SSB) resource or a Channel State Information Reference Signal (CSI-RS) resource. The embodiment transmits the report for the at least one uplink beam to the base station. The embodiment then receives, from the base station, an indication that the at least one uplink beam is selectable for uplink transmission based on the report for the uplink beam.

公开(公告)号：US12095690B2

公开(公告)日：2024-09-17

申请号：US17420449

申请日：2020-01-06

Applicant: Apple Inc.

Inventor： Gang Xiong ,  Jie Zhu ,  Yushu Zhang ,  Daewon Lee ,  Guotong Wang

IPC: H04L5/00 ,  H04W72/0446 ,  H04W72/0453

CPC classification number: H04L5/0048 ,  H04L5/001 ,  H04W72/0446 ,  H04W72/0453

Abstract: One or more computer-readable media (CRM) are disclosed. The CRM include instructions to, upon execution of the instructions by one or more processors of a base station, cause the base station to: generate a phase tracking reference signal (PT-RS) for phase shift compensation; and transmit the PT-RS across a physical downlink shared channel (PDSCH) using a single-carrier based waveform comprising a carrier frequency. The single-carrier based waveform may be SC-FDE or DFT-s-OFDM.

公开(公告)号：US11889501B2

公开(公告)日：2024-01-30

申请号：US17416743

申请日：2020-01-03

Applicant: Apple Inc.

Inventor： Alexei Davydov ,  Gang Xiong ,  Jie Zhu ,  Yushu Zhang ,  Guotong Wang ,  Daewon Lee ,  Gregory Morozov ,  Sameer Pawar

IPC: H04W72/1273 ,  H04W72/0446 ,  H04W72/0453 ,  H04W72/23

CPC classification number: H04W72/1273 ,  H04W72/0446 ,  H04W72/0453 ,  H04W72/23

Abstract: Methods and apparatus are described for methods and apparatus for carrying out wireless communication using Long Term Evolution (LTE) in a frequency band with low peak-to-average-power. The approach includes precoding, in the frequency domain, a plurality of physical channel signals, followed by multiplexing, where the procoding is performed according to predetermined codes with a code length selected based on a length of an entire signal of the multiplexed precoded plurality of physical channel signals. In addition, the approach includes being configured to map the multiplexed precoded plurality of physical channel signals to subcarriers in the frequency band, as well to generate a time domain waveform based on the mapped signals.