公开(公告)号：US20230308145A1

公开(公告)日：2023-09-28

申请号：US18320839

申请日：2023-05-19

Applicant: Apple Inc.

Inventor： Yu Zhang ,  Dawei Zhang ,  Haitong Sun ,  Wei Zeng ,  Yuchul Kim

IPC: H04B7/0456 ,  H04B7/06

CPC classification number: H04B7/0456 ,  H04B7/046 ,  H04B7/0626

Abstract: A base station may transmit to a device an indication of codebook subset restriction (CBSR), which includes at least a restriction on a frequency basis. The device may receive the indication of CBSR, and may transmit to the base station channel state information (CSI) according to the received indication of CBSR. The indication of CBSR may also include a restriction on a spatial basis and restrict the device from reporting the CSI based on a subset of the frequency basis in addition to the spatial basis per configuration of the base station. The indication of CBSR may include a separately configured maximum allowed amplitude of a weighting coefficient for the spatial basis and the frequency basis, where the weighting coefficient is associated with a column vector of a precoding matrix used by the base station and the device. The number of frequency bases and the frequency compression units may be determined based on a number of different criteria, for example the number of antennas, the number of subbands, etc.

公开(公告)号：US11489567B2

公开(公告)日：2022-11-01

申请号：US17224915

申请日：2021-04-07

Applicant: Apple Inc.

Inventor： Yu Zhang ,  Dawei Zhang ,  Haitong Sun ,  Wei Zeng ,  Yuchul Kim

IPC: H04B7/0456 ,  H04B7/06

Abstract: A base station may transmit to a device an indication of codebook subset restriction (CBSR), which includes at least a restriction on a frequency basis. The device may receive the indication of CBSR, and may transmit to the base station channel state information (CSI) according to the received indication of CBSR. The indication of CBSR may also include a restriction on a spatial basis and restrict the device from reporting the CSI based on a subset of the frequency basis in addition to the spatial basis per configuration of the base station. The indication of CBSR may include a separately configured maximum allowed amplitude of a weighting coefficient for the spatial basis and the frequency basis, where the weighting coefficient is associated with a column vector of a precoding matrix used by the base station and the device. The number of frequency bases and the frequency compression units may be determined based on a number of different criteria, for example the number of antennas, the number of subbands, etc.

公开(公告)号：US20200252949A1

公开(公告)日：2020-08-06

申请号：US16739916

申请日：2020-01-10

Applicant: Apple Inc.

Inventor： Yuchul Kim ,  Jia Tang ,  Yang Li ,  Wei Zeng ,  Haitong Sun ,  Yu Zhang ,  Zhu Ji ,  Dawei Zhang

IPC: H04W72/12 ,  H04W72/04 ,  H04L5/00 ,  H04W76/28 ,  H04W76/27

Abstract: This disclosure relates to techniques for a wireless device to dynamically adapt its bandwidth use using network scheduling information in a cellular communication system. A radio resource control connection between a cellular base station and a wireless device may be established. The wireless device may receive network scheduling information from the cellular base station. The wireless device may dynamically select a receive bandwidth for receiving transmissions from the cellular base station based at least in part on the network scheduling information.

公开(公告)号：US20190281504A1

公开(公告)日：2019-09-12

申请号：US16287305

申请日：2019-02-27

Applicant: Apple Inc.

Inventor： Yi Su ,  Yuchul Kim ,  Pengkai Zhao ,  Wei Zhang ,  Sami M. Almalfouh ,  Wei Zeng ,  Haitong Sun ,  Dawei Zhang ,  Yu Zhang ,  Tianyan Pu ,  Zhu Ji ,  Johnson O. Sebeni ,  Yang Li

IPC: H04W28/26 ,  H04W28/20 ,  H04W8/24 ,  H04W28/24 ,  H04W76/28 ,  H04W52/28

Abstract: This disclosure relates to techniques for a wireless device to indicate a preferred bandwidth part and duty cycle in a cellular communication system. A wireless device and a cellular base station may establish a radio resource control connection. The wireless device may transmit an indication of a preferred bandwidth part, or a preferred communication duty cycle, or both, to the cellular base station. The cellular base station may select a bandwidth part, or communication duty cycle, or both, based at least in part on the indication provided by the wireless device, and may transmit an indication of the selected bandwidth part, communication duty cycle, or both, to the wireless device. The cellular base station and the wireless device may perform cellular communication using the selected bandwidth part, communication duty cycle, or both.

公开(公告)号：US12040859B2

公开(公告)日：2024-07-16

申请号：US18320839

申请日：2023-05-19

Applicant: Apple Inc.

Inventor： Yu Zhang ,  Dawei Zhang ,  Haitong Sun ,  Wei Zeng ,  Yuchul Kim

IPC: H04B7/0456 ,  H04B7/06

CPC classification number: H04B7/0456 ,  H04B7/046 ,  H04B7/0626

Abstract: A base station may transmit to a device an indication of codebook subset restriction (CBSR), which includes at least a restriction on a frequency basis. The device may receive the indication of CBSR, and may transmit to the base station channel state information (CSI) according to the received indication of CBSR. The indication of CBSR may also include a restriction on a spatial basis and restrict the device from reporting the CSI based on a subset of the frequency basis in addition to the spatial basis per configuration of the base station. The indication of CBSR may include a separately configured maximum allowed amplitude of a weighting coefficient for the spatial basis and the frequency basis, where the weighting coefficient is associated with a column vector of a precoding matrix used by the base station and the device. The number of frequency bases and the frequency compression units may be determined based on a number of different criteria, for example the number of antennas, the number of subbands, etc.

公开(公告)号：US20230042158A1

公开(公告)日：2023-02-09

申请号：US17965147

申请日：2022-10-13

Applicant: Apple Inc.

Inventor： Yu Zhang ,  Dawei Zhang ,  Haitong Sun ,  Wei Zeng ,  Yuchul Kim

IPC: H04B7/0456 ,  H04B7/06

Abstract: A base station may transmit to a device an indication of codebook subset restriction (CBSR), which includes at least a restriction on a frequency basis. The device may receive the indication of CBSR, and may transmit to the base station channel state information (CSI) according to the received indication of CBSR. The indication of CBSR may also include a restriction on a spatial basis and restrict the device from reporting the CSI based on a subset of the frequency basis in addition to the spatial basis per configuration of the base station. The indication of CBSR may include a separately configured maximum allowed amplitude of a weighting coefficient for the spatial basis and the frequency basis, where the weighting coefficient is associated with a column vector of a precoding matrix used by the base station and the device. The number of frequency bases and the frequency compression units may be determined based on a number of different criteria, for example the number of antennas, the number of subbands, etc.

公开(公告)号：US20210303486A1

公开(公告)日：2021-09-30

申请号：US17242051

申请日：2021-04-27

Applicant: Apple Inc.

Inventor： Harshavardhan Kaushikkar ,  Christopher D. Shuler ,  Srinivasa Rangan Sridharan ,  Yu Zhang ,  Kaushik Kannan ,  Deniz Balkan

IPC: G06F13/16 ,  G06F13/40

Abstract: In one embodiment, a cache coherent system includes one or more agents (e.g., coherent agents) that may cache data used by the system. The system may include a point of coherency in a memory controller in the system, and thus the agents may transmit read requests to the memory controller to coherently read data. The point of coherency may determine if the data is cached in another agent, and may transmit a copy back request to the other agent if the other agent has modified the data. The system may include an interconnect between the agents and the memory controller. At a point on the interconnect at which traffic from the agents converges, a copy back response may be converted to a fill for the requesting agent.

公开(公告)号：US20210226678A1

公开(公告)日：2021-07-22

申请号：US17224915

申请日：2021-04-07

Applicant: Apple Inc.

Inventor： Yu Zhang ,  Dawei Zhang ,  Haitong Sun ,  Wei Zeng ,  Yuchul Kim

IPC: H04B7/0456 ,  H04B7/06

Abstract: A base station may transmit to a device an indication of codebook subset restriction (CBSR), which includes at least a restriction on a frequency basis. The device may receive the indication of CBSR, and may transmit to the base station channel state information (CSI) according to the received indication of CBSR. The indication of CBSR may also include a restriction on a spatial basis and restrict the device from reporting the CSI based on a subset of the frequency basis in addition to the spatial basis per configuration of the base station. The indication of CBSR may include a separately configured maximum allowed amplitude of a weighting coefficient for the spatial basis and the frequency basis, where the weighting coefficient is associated with a column vector of a precoding matrix used by the base station and the device. The number of frequency bases and the frequency compression units may be determined based on a number of different criteria, for example the number of antennas, the number of subbands, etc.

公开(公告)号：US10979109B2

公开(公告)日：2021-04-13

申请号：US16735750

申请日：2020-01-07

Applicant: Apple Inc.

Inventor： Yu Zhang ,  Dawei Zhang ,  Haitong Sun ,  Wei Zeng ,  Yuchul Kim

IPC: H04B7/0456 ,  H04B7/06

Abstract: A base station may transmit to a device an indication of codebook subset restriction (CBSR), which includes at least a restriction on a frequency basis. The device may receive the indication of CBSR, and may transmit to the base station channel state information (CSI) according to the received indication of CBSR. The indication of CBSR may also include a restriction on a spatial basis and restrict the device from reporting the CSI based on a subset of the frequency basis in addition to the spatial basis per configuration of the base station. The indication of CBSR may include a separately configured maximum allowed amplitude of a weighting coefficient for the spatial basis and the frequency basis, where the weighting coefficient is associated with a column vector of a precoding matrix used by the base station and the device. The number of frequency bases and the frequency compression units may be determined based on a number of different criteria, for example the number of antennas, the number of subbands, etc.

公开(公告)号：US10863389B2

公开(公告)日：2020-12-08

申请号：US16287305

申请日：2019-02-27

Applicant: Apple Inc.

Inventor： Yi Su ,  Yuchul Kim ,  Pengkai Zhao ,  Wei Zhang ,  Sami M. Almalfouh ,  Wei Zeng ,  Haitong Sun ,  Dawei Zhang ,  Yu Zhang ,  Tianyan Pu ,  Zhu Ji ,  Johnson O. Sebeni ,  Yang Li

IPC: H04W28/26 ,  H04W28/20 ,  H04W52/28 ,  H04W28/24 ,  H04W76/28 ,  H04W8/24

Abstract: This disclosure relates to techniques for a wireless device to indicate a preferred bandwidth part and duty cycle in a cellular communication system. A wireless device and a cellular base station may establish a radio resource control connection. The wireless device may transmit an indication of a preferred bandwidth part, or a preferred communication duty cycle, or both, to the cellular base station. The cellular base station may select a bandwidth part, or communication duty cycle, or both, based at least in part on the indication provided by the wireless device, and may transmit an indication of the selected bandwidth part, communication duty cycle, or both, to the wireless device. The cellular base station and the wireless device may perform cellular communication using the selected bandwidth part, communication duty cycle, or both.