公开(公告)号：US11509412B2

公开(公告)日：2022-11-22

申请号：US17261706

申请日：2019-08-19

Applicant: Apple Inc.

Inventor： Zhibin Yu ,  Dae Won Lee

IPC: H04J11/00 ,  H04L1/00 ,  H04L5/00

Abstract: Systems and methods of initial acquisition in a NR system are described. A UE receives time and frequency superposed SSBs from a gNB. If the PSS and SSS of each SSB is independent of a block index of the SSB, the UE receives an additional reference signal scrambled by a beam index of the SSB and uses the reference signal to discriminate between the SSBs. The reference signal is FDMed within a null-subcarrier region of the SSB or outside of the SSB. If the PSS and SSS of each SSB is scrambled using the block index, the UE separates the PBCH measurements, iteratively identifies a block index associated with a DMRS of the PBCH with the highest L1-RSRP level measurement, decodes and reconstructs the PBCH, and subtracts the reconstructed PBCH from the SSB before transmitting an indication of the PBCH with the highest L1-RSRP level measurement to the gNB.

公开(公告)号：US20220345346A1

公开(公告)日：2022-10-27

申请号：US17711127

申请日：2022-04-01

Applicant: Apple Inc.

Inventor： Gregory Morozov ,  Dae Won Lee ,  Alexei Davydov ,  Seung Hee Han ,  Yongjun Kwak

IPC: H04L27/26 ,  H04W76/11 ,  H04J13/00 ,  H04L1/00 ,  H04L5/00 ,  H04L5/10 ,  H04W56/00

Abstract: A reference signal sequence to modulate the demodulation reference signal for the Physical Broadcast Channel in New Radio standard is disclosed. Formulas are proposed for calculating the initialization value for the RS sequence generator so as to accord with the characteristics of New Radio.

公开(公告)号：US11457510B2

公开(公告)日：2022-09-27

申请号：US16638333

申请日：2018-08-09

Applicant: Apple Inc.

Inventor： Debdeep Chatterjee ,  Gang Xiong ,  Hong He ,  Yongjun Kwak ,  Alexei Davydov ,  Hwan-Joon Kwon ,  Dae Won Lee

IPC: H04W88/06 ,  H04L5/00 ,  H04W24/08 ,  H04W72/04 ,  H04W80/08

Abstract: A user equipment (UE) may receive information, via radio resource control (RRC) signaling, regarding a search space of a physical downlink control channel (PDCCH) for obtaining downlink control information (DCI) from a radio access network (RAN) node. Based on a slot format (SF) index in the DCI, the UE may determine a slot format for communicating with the RAN node, and communicate with the RAN node in accordance with the slot format. Additionally, a UE may communicate UE capability information, which may include a maximum number of blind decode attempts (BDAs), to the RAN node. The UE may determine shortened channel control elements (sCCEs) to be used, by the RAN node, to transmit shortened downlink control information (sDCI) via a shortened physical downlink control channel (sPDCCH), obtain sDCI by monitoring the sPDCCH in accordance with the determined sCCEs, and communicate with the RAN node in accordance with the sDCI.

公开(公告)号：US11316721B2

公开(公告)日：2022-04-26

申请号：US16976624

申请日：2018-07-26

Applicant: Apple Inc.

Inventor： Gregory Morozov ,  Dae Won Lee ,  Alexei Davydov ,  Seung Hee Han ,  Yongjun Kwak

IPC: H04W56/00 ,  H04L27/26 ,  H04W76/11 ,  H04J13/00 ,  H04L1/00 ,  H04L5/00 ,  H04L5/10

Abstract: A reference signal sequence to modulate the demodulation reference signal for the Physical Broadcast Channel in New Radio standard is disclosed. Formulas are proposed for calculating the initialization value for the RS sequence generator so as to accord with the characteristics of New Radio.

公开(公告)号：US11277191B2

公开(公告)日：2022-03-15

申请号：US16487665

申请日：2018-03-21

Applicant: APPLE INC.

Inventor： Kyeongin Jeong ,  Candy Yiu ,  Dae Won Lee ,  Yongjun Kwak ,  Ansab Ali ,  Youn Hyoung Heo

IPC: H04B7/06 ,  H04B17/309 ,  H04W76/19 ,  H04W24/10 ,  H04W28/04 ,  H04W72/04

Abstract: Apparatuses of wireless communication devices are disclosed. An apparatus of a user equipment includes one or more processors configured to start a first timer responsive to detection of a Radio Link (RL) failure, start a second timer and trigger a beam recovery procedure one or more times responsive to expiry of the first timer if RL recovery is not detected, and start a third timer and attempt to find a suitable cell for Radio Resource Control (RRC) connection reestablishment responsive to one or more expiries of the second timer if RL recovery fails. The one or more processors are also configured to go to an RRC idle or inactive state responsive to expiry of the third timer if a suitable cell for RRC connection reestablishment is not found.

公开(公告)号：US11265091B2

公开(公告)日：2022-03-01

申请号：US16734564

申请日：2020-01-06

Applicant: Apple Inc.

Inventor： Alexei Davydov ,  Seunghee Han ,  Debdeep Chatterjee ,  Gregory Morozov ,  Dae Won Lee ,  Yongjun Kwak

IPC: H04W72/04 ,  H04B7/08 ,  H04B17/382 ,  H04B7/06 ,  H04B17/318 ,  H04W24/08 ,  H04L5/00 ,  H04L25/02 ,  H04B17/24 ,  H04W24/10

Abstract: Embodiments of the present disclosure describe apparatuses, methods and machine-readable storage medium for Reference Signal Received Power (RSRP) measurement and allocation of Downlink (DL) transmission resources. A user equipment (UE) may detect a first Synchronization Signal/Physical Broadcast Channel (SS/PBCH) block, and determine a subcarrier spacing (SCS) thereof. Mapping the first SS/PBCH block to OFDM symbols may be dependent on the SCS and a first SS/PBCH block index of the first SS/PBCH block. The UE may determine, based on the first SS/PBCH block and the SCS, a number of symbols of the slot or the slot pair for a CORESET for reception of a DL control channel associated with Remaining Minimum System Information (RMSI). The UE may decode the DL control channel in the CORESET. The DL control channel may be configured to indicate a DL data channel carrying the RMSI associated with the first SS/PBCH block.

公开(公告)号：US20210344431A1

公开(公告)日：2021-11-04

申请号：US17234665

申请日：2021-04-19

Applicant: Apple Inc.

Inventor： Yushu Zhang ,  Wook Bong Lee ,  Dae Won Lee ,  Seunghee Han ,  Alexei Davydov ,  Guotong Wang ,  Gregory Morozov

IPC: H04B17/327 ,  H04B7/0413 ,  H04B7/06 ,  H04B7/08

Abstract: Provided herein are method and apparatus for perform radio link monitoring (RLM) based on a Reference signal (RS). An embodiment provides a user Equipment (UE) comprising circuitry configured to: decode a Reference Signal (RS) received from an access node; and determine beam quality for one or more beam pair links (BPLs) of the RS between the UE and the access node based on the decoded RS, wherein each of the BPLs comprises a transmit (Tx) beam of the access node and a receive (Rx) beam of the UE. Also provided is a procedure of RLM. At least some embodiments allow for beam recovery request for UE beam refinement, and allow for determining whether radio link failure (RLF) occurs.

公开(公告)号：US11147104B2

公开(公告)日：2021-10-12

申请号：US16409530

申请日：2019-05-10

Applicant: Apple Inc.

Inventor： Yujian Zhang ,  Seunghee Han ,  Gregory Morozov ,  Ansab Ali ,  Dae Won Lee ,  Yongjun Kwak

IPC: H04W74/08 ,  H04W72/04 ,  H04J11/00 ,  H04B7/08 ,  H04B7/0413 ,  H04B17/327 ,  H04L5/00

Abstract: Systems and methods of selecting a PRACH resource opportunity are described. One of multiple Synchronization Signal Blocks (SSBs) is received. Each SSB has PSSs, SSSs and a PBCH that contain system information. A RACH occasion (RO) is selected from among multiple ROs associated with the SSB. A PRACH is transmitted on resources of the RO. The ROs are configured in a TDM and/or FDM manner. The RO is selected randomly or, if TDM is used, an earliest of the ROs from a UE-initiated RACH transmission in a previous period. A preamble of the RO is selected randomly with equal probability.

公开(公告)号：US11051202B2

公开(公告)日：2021-06-29

申请号：US16408313

申请日：2019-05-09

Applicant: APPLE INC.

Inventor： Alexei Davydov ,  Seung Hee Han ,  Debdeep Chatterjee ,  Hong He ,  Gregory V. Morozov ,  Ajit Nimbalker ,  Fatemeh Hamidi-Sepehr ,  Dae Won Lee ,  Yongjun Kwak

IPC: H04W28/02

Abstract: Technology for a user equipment (UE) operable to determine a transport block size (TBS) is disclosed. The UE can determine a number of assigned resource elements (REs) in one or more symbols for a transport block. The UE can determine a reference number of REs per physical resource block (PRB) in the transport block based on a reference number of REs for the transport block corresponding to each PRB and an assigned number of PRBs for the transport block. The UE can determine a TBS for the transport block based at least on the reference number of REs per PRB in the transport block. The UE can encode information in a selected transport block for transmission via a physical uplink shared channel (PUSCH) to a Next Generation NodeB (gNB) in accordance with the TBS determined at the UE.

公开(公告)号：US10966236B2

公开(公告)日：2021-03-30

申请号：US16465530

申请日：2018-03-22

Applicant: Apple Inc.

Inventor： Gang Xiong ,  Hong He ,  Ajit Nimbalker ,  Joonyoung Cho ,  Dae Won Lee

IPC: H04W72/12 ,  H04L1/18 ,  H04L5/00 ,  H04W72/04

Abstract: An apparatus of a base station, system and method. The apparatus includes a memory and processing circuitry configured to: determine a physical downlink control channel (PDCCH) on a first component carrier; encode a first signal to be transmitted on the PDCCH, the first signal including downlink control information (DCI) on resources for a second signal to be transmitted on a second component carrier, wherein the DCI is based on a predetermined numerology, and wherein respective numerologies of the first component carrier and the second component carrier are different from one another. The processing circuitry is further to cause transmission of the first signal on the PDCCH, wherein a receiver of the second signal is to process the second signal based on the control information in the first signal.