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    Timing improvements for wireless communications systems
    112.
    发明授权
    Timing improvements for wireless communications systems 有权

    公开(公告)号：US11937193B2

    公开(公告)日：2024-03-19

    申请号：US17214538

    申请日：2021-03-26

    Applicant: QUALCOMM Incorporated

    Inventor： Alberto Rico Alvarino ,  Xiao Feng Wang ,  Liangping Ma ,  Ayan Sengupta ,  Jun Ma ,  Huilin Xu ,  Peter Gaal ,  Bharat Shrestha

    IPC: H04W56/00 ,  H04W4/029

    CPC classification number: H04W56/0005 ,  H04W4/029 ,  H04W74/0833

    Abstract: Non-terrestrial networks (NTNs) may establish uplink (UL) and downlink (DL) radio frame timing structures to efficiently account for propagation delay and propagation delay variation associated with communications in the NTN. NTNs may manage (synchronize) radio frame timing structures of base stations (e.g., satellites) and user equipment (UEs) in the NTN. Further, UEs may determine timing advance (TA) values to be applied to UL transmissions based on their respective scheduling offset (e.g., offset in UL and DL radio frame timing structures), as well as based on propagation delay or round trip time (RTT). As such, served UEs may determine UL timing such that UL transmissions from the UEs to a satellite arrives at the satellite in a time synchronized manner. In other cases, a satellite may determine UL timing, based on reception timing, such that various UEs in the NTN may implement uniform UL and DL radio frame timing structures.

    FDM UES with different guard intervals
    115.
    发明授权
    FDM UES with different guard intervals 有权

    公开(公告)号：US11916712B2

    公开(公告)日：2024-02-27

    申请号：US17451559

    申请日：2021-10-20

    Applicant: QUALCOMM Incorporated

    Inventor： Iyab Issam Sakhnini ,  Tao Luo ,  Xiaoxia Zhang ,  Jing Sun ,  Jun Ma

    IPC: H04L27/26 ,  H04W56/00

    CPC classification number: H04L27/2607 ,  H04L27/2636 ,  H04W56/004

    Abstract: Method and apparatus to use different GI sequences for different FDM UEs. The apparatus calculates a GI of each UE from a set of UEs based at least on a delay spread associated with each UE from the set of UEs. The apparatus multiplexes data and the GI of each respective UE from the set of UEs to generate a waveform. The apparatus transmits the waveform to the set of UEs. The apparatus may receive, from each UE from the set of UEs, the delay spread associated with each UE from the set of UEs. The apparatus may multiplex the GI of each respective UE from the set of UEs prior to performing a DFT operation on the GI and the data. The apparatus may multiplex the GI of each respective UE from the set of UEs after performing an IDFT operation to generate the waveform.

    Dynamic slot format configuration
    117.
    发明授权
    Dynamic slot format configuration 有权

    公开(公告)号：US11871440B2

    公开(公告)日：2024-01-09

    申请号：US17357950

    申请日：2021-06-24

    Applicant: QUALCOMM Incorporated

    Inventor： Iyab Issam Sakhnini ,  Tao Luo ,  Jing Sun ,  Jun Ma ,  Xiaoxia Zhang ,  Hemant Saggar ,  Morteza Soltani ,  Junyi Li

    IPC: H04W72/0446 ,  H04W72/23 ,  H04W72/541 ,  H04W72/51

    CPC classification number: H04W72/541 ,  H04W72/0446 ,  H04W72/23 ,  H04W72/51

    Abstract: Methods, systems, and devices for wireless communication are described. In some wireless communications systems, a base station may transmit, to a user equipment (UE), an indication of a dynamic switch between slot formats. The base station and the UE may communicate first data in one or more first slots according to a first slot format. The first slot format may be a first cyclic prefix-based or guard interval-based slot format. The base station may transmit control signaling to the UE to indicate a second slot format different from the first slot format. The second slot format may be a second cyclic prefix-based or guard interval-based slot format. The UE and the base station may switch to communicating second data in one or more second slots in accordance with the second slot format based on the control signaling.

    Cyclic prefix duration extension by resource element skipping
    119.
    发明授权
    Cyclic prefix duration extension by resource element skipping 有权

    公开(公告)号：US11855826B2

    公开(公告)日：2023-12-26

    申请号：US17470735

    申请日：2021-09-09

    Applicant: QUALCOMM Incorporated

    Inventor： Huilin Xu ,  Jun Ma ,  Weimin Duan ,  Mehmet Izzet Gurelli ,  Qiang Wu

    IPC: H04B7/08 ,  H04B7/0404 ,  H04B7/06 ,  H04W72/04 ,  H04L27/26 ,  H04L5/00 ,  H04W72/23

    CPC classification number: H04L27/2636 ,  H04L5/0048 ,  H04W72/23

    Abstract: Example implementations include a method, apparatus and computer-readable medium of wireless communication for applying resource element (RE) skipping to a symbol where a beam change is to occur. A transmitter and a receiver determine that a beam change is to occur during the symbol. The transmitter allocates bits to a subset of REs for the symbol in a frequency domain allocation. Each RE of the subset is spaced apart by a number of empty REs. The transmitter performs an inverse fast Fourier transform (IFFT) on the REs to generate a time domain signal including a number of repetitions of a transmitted waveform. The receiver receives the time domain signal during at least a portion of the symbol. The receiver performs a fast Fourier transform (FFT) on the time domain signal and determines transmitted bits or a channel from the subset of REs output from the FFT.

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