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    Accurate Over the Air Synchronization
    1.
    发明申请
    Accurate Over the Air Synchronization 审中-公开

    公开(公告)号：US20170142674A1

    公开(公告)日：2017-05-18

    申请号：US15037016

    申请日：2016-03-30

    Applicant: Telefonaktiebolaget LM Ericsson (publ)

    Inventor： Angelo Centonza ,  Magnus Sandgren ,  Chunhui Zhang

    IPC: H04W56/00 ,  H04W64/00 ,  H04W24/02 ,  H04L5/00

    CPC classification number: H04W56/004 ,  H04L5/0048 ,  H04W24/02 ,  H04W56/0025 ,  H04W56/006 ,  H04W64/003 ,  H04W84/18

    Abstract: In one aspect, a first device determines transmitter location information indicating a location for each of one or more transmitters that provide synchronization signals. The first device inserts the transmitter location information in a time synchronization IE and transmits the time synchronization IE to a second device. The second device receives the transmitter location information from the first device and determines one or more propagation delays of a synchronization signal received from a transmitter based on the transmitter location information received for the transmitter in the IE. The second device uses the determined one or more propagation delays to compensate for a timing difference between the first device and a transmitter of the synchronization signal.

    Performing Measurements According to Relaxed Criteria
    2.
    发明申请
    Performing Measurements According to Relaxed Criteria 有权

    公开(公告)号：US20250039708A1

    公开(公告)日：2025-01-30

    申请号：US18713014

    申请日：2022-11-24

    Applicant: Telefonaktiebolaget LM Ericsson (PUBL)

    Inventor： Santhan Thangarasa ,  Muhammad Ali Kazmi ,  Zhixun TANG ,  Chunhui Zhang

    IPC: H04W24/08 ,  H04W74/0808

    Abstract: Methods and apparatuses for control of measurements are disclosed. According to an embodiment, a terminal device obtains (202) information about at least one relaxed measurement criterion, RMC. The terminal device determines (204) whether first criteria associated with a first mode of operation, MO, or second criteria associated with a second MO are satisfied, based at least on the obtained information. Measurements under the first MO are less stringent than measurements under the second MO. At least one criterion in at least one of the first criteria and the second criteria is associated with a result of clear channel assessment, CCA, procedure in at least one cell. The terminal device uses (206) a result of the determination for performing one or more operational tasks.

    SYSTEMS AND METHODS FOR SELECTING SUBCARRIERS FOR SUB-PRB TRANSMISSIONS
    3.
    发明申请
    SYSTEMS AND METHODS FOR SELECTING SUBCARRIERS FOR SUB-PRB TRANSMISSIONS 有权

    公开(公告)号：US20210377085A1

    公开(公告)日：2021-12-02

    申请号：US16341441

    申请日：2018-10-30

    Applicant: TELEFONAKTIEBOLAGET LM ERICSSON (PUBL)

    Inventor： Yi-Pin Eric Wang ,  Anders Eriksson ,  Johan Bergman ,  Chunhui Zhang ,  Gerardo Agni Medina Acosta

    IPC: H04L27/20 ,  H04L5/00 ,  H04L27/26

    Abstract: Systems and methods for selecting subcarriers to be used for sub-Physical Resource Block (PRB) transmission and, in some embodiments, for mapping Demodulation Reference Signals (DMRS) to resources on the selected subcarriers are disclosed. In some embodiments, a method of operation of a radio node for providing sub-PRB transmission comprises selecting two adjacent subcarriers from a set of three allocated subcarriers that are allocated for a sub-PRB transmission that uses Single Carrier Frequency Division Multiple Access (SC-FDMA) Pi/2 Binary Phase Shift Keying (BPSK) modulation using only two adjacent subcarriers out of the set of three allocated subcarriers with Discrete Fourier Transform (DFT) spread length of 2. In some embodiments, the selection is such that the selected adjacent subcarriers varies, e.g., from one cell to another. In doing so, interference is distributed.

    FREQUENCY HOPPING FOR JOINT CHANNEL ESTIMATION
    4.
    发明申请
    FREQUENCY HOPPING FOR JOINT CHANNEL ESTIMATION 有权

    公开(公告)号：US20240388390A1

    公开(公告)日：2024-11-21

    申请号：US18690649

    申请日：2022-09-30

    Applicant: Telefonaktiebolaget LM Ericsson (publ)

    Inventor： Robert Mark Harrison ,  Johan Axnäs ,  Zhipeng Lin ,  Anqi He ,  Ling Su ,  Chunhui Zhang

    IPC: H04L5/00 ,  H04L5/14 ,  H04W72/0446 ,  H04W72/0453

    Abstract: Systems and methods are disclosed for frequency hopping schemes that are compatible with joint channel estimation. In one embodiment, a method implemented in a User Equipment (UE) comprises determining a value of a hopping index for a first set of N consecutive slots, wherein the N is an integer greater than 1, and after the N consecutive slots, incrementing the value of the hopping index for a second set of N consecutive slots. The method further comprises, for an uplink slot within the second set of N consecutive slots, determining a set of physical resource blocks (PRBs) in which to transmit a physical channel from a set of frequency offsets according to the value of the hopping index for the second set of slots and transmitting the physical uplink channel in the selected set of PRBs in the uplink slot.

    SYSTEMS AND METHODS FOR SELECTING SUBCARRIERS FOR SUB-PRB TRANSMISSIONS
    9.
    发明申请
    SYSTEMS AND METHODS FOR SELECTING SUBCARRIERS FOR SUB-PRB TRANSMISSIONS 有权

    公开(公告)号：US20220353118A1

    公开(公告)日：2022-11-03

    申请号：US17863465

    申请日：2022-07-13

    Applicant: Telefonaktiebolaget LM Ericsson (publ)

    Inventor： Yi-Pin Eric Wang ,  Anders K. Eriksson ,  Johan Bergman ,  Chunhui Zhang ,  Gerardo Agni Medina Acosta

    IPC: H04L27/20 ,  H04L27/26 ,  H04L5/00

    Abstract: Systems and methods for selecting subcarriers to be used for sub-Physical Resource Block (PRB) transmission and, in some embodiments, for mapping Demodulation Reference Signals (DMRS) to resources on the selected subcarriers are disclosed. In some embodiments, a method of operation of a radio node for providing sub-PRB transmission comprises selecting two adjacent subcarriers from a set of three allocated subcarriers that are allocated for a sub-PRB transmission that uses Single Carrier Frequency Division Multiple Access (SC-FDMA) Pi/2 Binary Phase Shift Keying (BPSK) modulation using only two adjacent subcarriers out of the set of three allocated subcarriers with Discrete Fourier Transform (DFT) spread length of 2. In some embodiments, the selection is such that the selected adjacent subcarriers varies, e.g., from one cell to another. In doing so, interference is distributed.

    Systems and methods for selecting subcarriers for sub-PRB transmissions
    10.
    发明授权
    Systems and methods for selecting subcarriers for sub-PRB transmissions 有权

    公开(公告)号：US11418374B2

    公开(公告)日：2022-08-16

    申请号：US16341441

    申请日：2018-10-30

    Applicant: TELEFONAKTIEBOLAGET LM ERICSSON (PUBL)

    Inventor： Yi-Pin Eric Wang ,  Anders Eriksson ,  Johan Bergman ,  Chunhui Zhang ,  Gerardo Agni Medina Acosta

    IPC: H04L27/20 ,  H04L27/26 ,  H04L5/00

    Abstract: Systems and methods for selecting subcarriers to be used for sub-Physical Resource Block (PRB) transmission and, in some embodiments, for mapping Demodulation Reference Signals (DMRS) to resources on the selected subcarriers are disclosed. In some embodiments, a method of operation of a radio node for providing sub-PRB transmission comprises selecting two adjacent subcarriers from a set of three allocated subcarriers that are allocated for a sub-PRB transmission that uses Single Carrier Frequency Division Multiple Access (SC-FDMA) Pi/2 Binary Phase Shift Keying (BPSK) modulation using only two adjacent subcarriers out of the set of three allocated subcarriers with Discrete Fourier Transform (DFT) spread length of 2. In some embodiments, the selection is such that the selected adjacent subcarriers varies, e.g., from one cell to another. In doing so, interference is distributed.

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