公开(公告)号：US20250126558A1

公开(公告)日：2025-04-17

申请号：US18938758

申请日：2024-11-06

Applicant: Huawei Technologies Co., Ltd.

Inventor： Jianglei Ma ,  Yongxia Lyu ,  Liqing Zhang

IPC: H04W52/02 ,  H04L1/1867

Abstract: The power requirements of user equipments (UEs) are expected to increase as their capabilities increase. Some power saving methods have previously been proposed, but are limited by the radio resource control (RRC) protocol and do not address the power consumption associated with having to transition between different RRC states. In some embodiments described herein, there are not different RRC states, but instead a single RRC state. Within that single RRC state, there are different modes of operation, e.g. a default low power operation mode and an enhanced power operation mode. In some embodiments, the UE switches from the default operation mode to the enhanced operation mode on an on-demand basis (e.g. based on the communication capability required by the UE), and then returns back to the default operation mode.

公开(公告)号：US12004214B2

公开(公告)日：2024-06-04

申请号：US18185556

申请日：2023-03-17

Applicant: Huawei Technologies Co., Ltd.

Inventor： Jiayin Zhang ,  Mohamed Adel Salem ,  Liqing Zhang

IPC: H04W74/0808 ,  H04W16/14 ,  H04W72/0446 ,  H04W72/0453 ,  H04W72/23 ,  H04W74/0833 ,  H04W76/27

CPC classification number: H04W74/0808 ,  H04W16/14 ,  H04W72/0446 ,  H04W72/0453 ,  H04W72/23 ,  H04W74/0833 ,  H04W76/27

Abstract: Method and devices are provided for a channel access mechanism for accessing a network on a random access channel (RACH). Methods involve defining a listen-before-talk (LBT) category to be used as part of a contention based procedure and how a contention window that is part of the LBT can be dynamically adjusted.

公开(公告)号：US11621809B2

公开(公告)日：2023-04-04

申请号：US16932505

申请日：2020-07-17

Applicant: Huawei Technologies Co., Ltd.

Inventor： Kelvin Kar Kin Au ,  Jianglei Ma ,  Liqing Zhang

IPC: H04L5/00 ,  H04L27/26 ,  H04L5/06

Abstract: Different filtered-orthogonal frequency division multiplexing (f-OFDM) frame formats may be used to achieve the spectrum flexibility. F-OFDM waveforms are generated by applying a pulse shaping digital filter to an orthogonal frequency division multiplexed (OFDM) signal. Different frame formats may be used to carry different traffic types as well as to adapt to characteristics of the channel, transmitter, receiver, or serving cell. The different frame formats may utilize different sub-carrier (SC) spacings and/or cyclic prefix (CP) lengths. In some embodiments, the different frame formats also utilize different symbol durations and/or transmission time interval (TTI) lengths.

公开(公告)号：US11611990B2

公开(公告)日：2023-03-21

申请号：US16999976

申请日：2020-08-21

Applicant: Huawei Technologies Co., Ltd.

Inventor： Jiayin Zhang ,  Mohamed Adel Salem ,  Liqing Zhang

IPC: H04W74/08 ,  H04W16/14 ,  H04W72/04 ,  H04W72/14 ,  H04W76/27 ,  H04W72/0446 ,  H04W72/0453

Abstract: Method and devices are provided for a channel access mechanism for accessing a network on a random access channel (RACH). Methods involve defining a listen-before-talk (LBT) category to be used as part of a contention based procedure and how a contention window that is part of the LBT can be dynamically adjusted.

公开(公告)号：US11570804B2

公开(公告)日：2023-01-31

申请号：US17000131

申请日：2020-08-21

Applicant: Huawei Technologies Co., Ltd.

Inventor： Mohamed Adel Salem ,  Jiayin Zhang ,  Liqing Zhang

IPC: H04W72/14 ,  H04L41/0806 ,  H04W72/04 ,  H04W74/08 ,  H04L5/00

Abstract: Methods and devices are provided that enable configuration of a selected set of electronic devices (EDs) that are allocated the same time-domain resources and either orthogonal or the same frequency interlaces on a same unlicensed channel. Configuring the selected set of EDs in order to align transmission starting points in the unlicensed channel and utilizing blocking symbols for at least some of the transmission starting points, may mitigate mutual blocking during LBT procedures.

公开(公告)号：US20220174606A1

公开(公告)日：2022-06-02

申请号：US17651655

申请日：2022-02-18

Applicant: Huawei Technologies Co., Ltd.

Inventor： Kelvin Kar Kin Au ,  Liqing Zhang ,  Jianglei Ma

IPC: H04W52/02

Abstract: A method for operating a user equipment (UE) includes determining a first operating state in accordance with a first message traffic generated by a non-session based application executing in the UE, setting a state machine in the UE to the first operating state, and transmitting a first message in accordance with the state machine.

公开(公告)号：US11265849B2

公开(公告)日：2022-03-01

申请号：US16901807

申请日：2020-06-15

Applicant: Huawei Technologies Co., Ltd.

Inventor： Jiayin Zhang ,  Liqing Zhang

IPC: H04W72/04 ,  H04W72/12 ,  H04W72/14 ,  H04W74/08

Abstract: Methods and devices for grant-based uplink transmission in an unlicensed band are provided. Uplink grant messages are transmitted to electronic devices (EDs) in order to indicate time-frequency resources that are allocated to the EDs for uplink transmission in an unlicensed spectrum band. For a given ED, in the event that a first listen-before-talk (LBT) operation for the time-frequency resource allocated to the ED fails, the ED performs a second LBT operation within the allocated time-frequency resource at a start time based on a start point configuration within the allocated time-frequency resource. If the second LBT operation succeeds, the ED transmits an uplink transmission within a remaining portion of the allocated time-frequency resource that includes an activation signal to indicate a start of the uplink transmission, and uplink payload data.

公开(公告)号：US11259246B2

公开(公告)日：2022-02-22

申请号：US16152717

申请日：2018-10-05

Applicant: Huawei Technologies Co., Ltd.

Inventor： Kelvin Kar Kin Au ,  Liqing Zhang ,  Jianglei Ma

IPC: G08C17/00 ,  H04W52/02 ,  H04W88/02

Abstract: A method for operating a user equipment (UE) includes determining a first operating state in accordance with a first message traffic generated by a non-session based application executing in the UE, setting a state machine in the UE to the first operating state, and transmitting a first message in accordance with the state machine.

公开(公告)号：US11070339B2

公开(公告)日：2021-07-20

申请号：US16165780

申请日：2018-10-19

Applicant: Huawei Technologies Co., Ltd.

Inventor： Kelvin Kar Kin Au ,  Liqing Zhang ,  Mohammadhadi Baligh ,  Jianglei Ma ,  Wen Tong

IPC: H04L5/00 ,  H04W74/00

Abstract: A method and system for operating a user equipment (UE) wherein a first set of radio access procedures are supported when the UE is in a first operating state, and a second set of radio access procedures are supported when the UE is in a second operating state.

公开(公告)号：US11019645B2

公开(公告)日：2021-05-25

申请号：US15964894

申请日：2018-04-27

Applicant: Huawei Technologies Co., Ltd.

Inventor： Kelvin Kar Kin Au ,  Hosein Nikopour ,  Petar Djukic ,  Zhihang Yi ,  Alireza Bayesteh ,  Jianglei Ma ,  Mohammadhadi Baligh ,  Liqing Zhang

IPC: H04W72/12 ,  H04W72/02 ,  H04L5/00 ,  H04L1/00 ,  H04L27/26 ,  H04L1/18 ,  H04W74/08

Abstract: A method embodiment includes implementing, by a base station (BS), a grant-free uplink transmission scheme. The grant-free uplink transmission scheme defines a first contention transmission unit (CTU) access region in a time-frequency domain, defines a plurality of CTUs, defines a default CTU mapping scheme by mapping at least some of the plurality of CTUs to the first CTU access region, and defines a default user equipment (UE) mapping scheme by defining rules for mapping a plurality of UEs to the plurality of CTUs.