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    TIMING IMPROVEMENTS FOR WIRELESS COMMUNICATIONS SYSTEMS
    51.
    发明申请
    TIMING IMPROVEMENTS FOR WIRELESS COMMUNICATIONS SYSTEMS 有权

    公开(公告)号：US20210314889A1

    公开(公告)日：2021-10-07

    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 ,  H04W74/08

    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.

    TWO-ROOT PREAMBLE DESIGN FOR DELAY AND FREQUENCY SHIFT
    52.
    发明申请
    TWO-ROOT PREAMBLE DESIGN FOR DELAY AND FREQUENCY SHIFT 有权

    公开(公告)号：US20210051730A1

    公开(公告)日：2021-02-18

    申请号：US16992678

    申请日：2020-08-13

    Applicant: QUALCOMM Incorporated

    Inventor： Dan Zhang ,  Xiao Feng Wang ,  Peter Gaal ,  Jun Ma ,  Qiang Wu ,  Iyab Issam Sakhnini ,  Huilin Xu

    IPC: H04W74/08 ,  H04L5/00 ,  H04L27/00

    Abstract: Methods, systems, and devices for wireless communications are described. A user equipment (UE) may communicate with a base station by initiating a random access procedure with a two-root preamble. The UE may receive, from the base station, control signaling that indicates a set of root preamble sequences. The UE may transmit, to the base station, a preamble signal that is generated based on a first root preamble sequence and a second root preamble sequence of the set of root preamble sequences. The UE may then monitor for a preamble response based on the preamble signal. In some cases, the base station may be a base station in a terrestrial network. In other cases, the base station may be a satellite in a non-terrestrial network (NTN).

    CLOSED LOOP FREQUENCY CORRECTION FOR NON-TERRESTRIAL NETWORK SYSTEMS
    53.
    发明申请
    CLOSED LOOP FREQUENCY CORRECTION FOR NON-TERRESTRIAL NETWORK SYSTEMS 审中-公开

    公开(公告)号：US20200313754A1

    公开(公告)日：2020-10-01

    申请号：US16831699

    申请日：2020-03-26

    Applicant: QUALCOMM Incorporated

    Inventor： Xiao Feng Wang ,  Jun Ma ,  Iyab Issam Sakhnini ,  Dan Zhang

    IPC: H04B7/185 ,  H04L27/26 ,  H04W74/08 ,  H04W72/12

    Abstract: Methods, systems, and devices for wireless communications are described. Generally, the described techniques provide for efficiently determining appropriate uplink frequencies for uplink transmissions to a satellite. As described herein, a wireless communications system may support a closed loop frequency correction scheme where a satellite may provide an uplink frequency correction to a user equipment (UE) such that the UE may be able to identify an appropriate uplink frequency for an uplink transmission. In some implementations, the UE may first transmit an uplink signal to the satellite on an initial uplink frequency, and the satellite may determine a corrected uplink frequency for the UE based on the initial uplink frequency. The satellite may then transmit an indication of the corrected uplink frequency to the UE, and the UE may transmit a second uplink signal based on the corrected uplink frequency.

    UPSTREAM TIMING CONTROL MECHANISMS FOR NON-TERRESTRIAL NETWORKS
    54.
    发明申请
    UPSTREAM TIMING CONTROL MECHANISMS FOR NON-TERRESTRIAL NETWORKS 审中-公开

    公开(公告)号：US20190394770A1

    公开(公告)日：2019-12-26

    申请号：US16444954

    申请日：2019-06-18

    Applicant: QUALCOMM Incorporated

    Inventor： Xiao Feng Wang ,  Iyab Issam Sakhnini ,  Alberto Rico Alvarino ,  Peter Gaal ,  Jun Ma

    IPC: H04W72/04 ,  H04W76/28

    Abstract: Methods, systems, and devices for wireless communications that support upstream timing control mechanisms for non-terrestrial networks are described. Generally, the described techniques provide for wireless communications from a user equipment (UE) in wireless communication with a satellite. A gateway in the non-terrestrial networks may receive an upstream transmission from the UE in wireless communication with the satellite and determine a timing adjustment for a second upstream transmission from the UE based on the upstream transmission from the UE. The gateway may then transmit to the UE in a group control information message or a dedicated physical channel message, a timing command indicating the timing adjustment for the second upstream transmission. The UE may receive the second timing adjustment and transmit data over the second upstream transmission using the second timing adjustment.

    Feedback resource allocation for multiple carriers
    55.
    发明授权
    Feedback resource allocation for multiple carriers 有权

    公开(公告)号：US10477520B2

    公开(公告)日：2019-11-12

    申请号：US15164765

    申请日：2016-05-25

    Applicant: QUALCOMM Incorporated

    Inventor： Ruoheng Liu ,  Jun Ma ,  Qiang Wu

    IPC: H04W72/04 ,  H04L1/18 ,  H04W72/14 ,  H04W74/08 ,  H04L5/00 ,  H04B7/185 ,  H04W84/06 ,  H04W88/16

    Abstract: Various aspects of the disclosure relate to allocating control signaling resources for multiple carrier scenarios. In an example implementation, N-to-1 mapping is used between forward link control signaling resource allocation indices (e.g., control channel elements) and return link control signaling resources (e.g., for ACK/NACK signaling) indices in each return link component carrier. A collision between forward link control signaling assignments for different user terminals (UTs) may occur when UT-specific search spaces overlap each other. Such a collision may be avoided, for example, by scheduling different UTs on different return link component carriers, scheduling return link grants instead of forward link grants, or scheduling a different forward link control signaling candidate that is associated with a different forward link control signaling resource allocation index.

    Reference signal based information using index modulation
    57.
    发明授权
    Reference signal based information using index modulation 有权

    公开(公告)号：US12267264B2

    公开(公告)日：2025-04-01

    申请号：US17450771

    申请日：2021-10-13

    Applicant: QUALCOMM Incorporated

    Inventor： Iyab Issam Sakhnini ,  Tao Luo ,  Junyi Li ,  Mahmoud Taherzadeh Boroujeni ,  Wanshi Chen ,  Qiang Wu ,  Jun Ma ,  Linhai He ,  Peter Gaal

    IPC: H04L5/00

    Abstract: An apparatus, e.g., a UE, for transmission of information modulated onto RSs using index modulation is disclosed. The UE may receive, from a base station, a configuration of one or more RS resources of an RS resource set. The one or more RS resources may be associated with an index modulation technique including a plurality of UL or DL information bits. The UE may transmit, to the base station, or receive, from the base station, the plurality of UL or DL information bits. The plurality of UL or DL information bits may include at least one of one or more first bits or one or more second bits. At least one of the one or more RS resources may be selected based on at least one of the one or more first bits or the one or more second bits.

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