中科微点-全球专利检索

  1. Login
  2. Sign Up

Search Results

211 records (took 0.053 seconds)

    Quality of Service Control in Multiple Hop Wireless Communication Environments
    51.
    发明申请
    Quality of Service Control in Multiple Hop Wireless Communication Environments 有权
    多跳无线通信环境中的服务质量控制

    公开(公告)号：US20130033986A1

    公开(公告)日：2013-02-07

    申请号：US13632366

    申请日：2012-10-01

    Applicant: Apple Inc.

    Inventor： Hang Zhang ,  Pelying Zhu ,  Wen Tong ,  Gamini Senarath ,  Derek Yu ,  David G. Steer

    IPC: H04W24/00

    CPC classification number: H04W40/12 ,  H04B7/2606 ,  H04L12/4633 ,  H04L47/24 ,  H04L47/28 ,  H04L69/22 ,  H04W16/26 ,  H04W28/18 ,  H04W28/24 ,  H04W40/22 ,  H04W72/0413 ,  H04W72/042 ,  H04W76/12 ,  H04W84/047 ,  H04W84/12

    Abstract: One or more relay stations may be employed along a wireless communication access path between an ingress station and an egress station. A logical communication tunnel is established between the ingress and egress stations through any number of intermediate relay stations to handle session flows of PDUs. As PDUs arrive, the ingress station may determine and add scheduling information to the PDUs before they are delivered to the downstream intermediate relay stations or egress stations. The scheduling information is used by the downstream stations to schedule the PDUs for further delivery. The scheduling information may also be used by the egress station to schedule the PDUs for delivery. The scheduling information added to the PDU by the ingress station bears on a QoS class associated with the PDU, a deadline for the egress station to deliver the PDU, or a combination thereof.

    Abstract translation: 可以沿入站和出站之间的无线通信接入路径采用一个或多个中继站。 通过任意数量的中间中继站在进入和出站之间建立逻辑通信隧道，以处理PDU的会话流。 当PDU到达时，进入站可以在PDU递送到下游中间中继站或出站之前确定并将调度信息添加到PDU。 下游站使用调度信息来调度PDU以进一步传送。 调度信息也可以由出站使用，以调度用于传送的PDU。 由入站站添加到PDU的调度信息承载在与PDU相关联的QoS类别，出站台递送PDU的最后期限或其组合。

    Methods and systems for resource allocation
    52.
    发明授权
    Methods and systems for resource allocation 有权

    公开(公告)号：US11509431B2

    公开(公告)日：2022-11-22

    申请号：US16940286

    申请日：2020-07-27

    Applicant: Apple Inc.

    Inventor： Robert Novak ,  Mo-Han Fong ,  Hang Zhang ,  Sophie Vrzic

    IPC: H04L5/00 ,  H04L1/18 ,  H04W52/48 ,  H04W72/12 ,  H04W52/34 ,  H04W72/04

    Abstract: Various methods and systems are provided for allocating time-frequency resources for downlink (DL) and uplink (UL) communications between base stations and mobile stations. Different forms of resource allocation messages including combinations of bitmaps and bitfields provide additional information about the resources and/or how they are assigned. In some implementations the resource allocation messages enable reduced overhead, which may ultimately improve transmission rates and/or the quality of transmissions.

    Methods and systems for resource allocation
    53.
    发明授权
    Methods and systems for resource allocation 有权

    公开(公告)号：US10727989B2

    公开(公告)日：2020-07-28

    申请号：US16157413

    申请日：2018-10-11

    Applicant: Apple Inc.

    Inventor： Robert Novak ,  Mo-Han Fong ,  Hang Zhang ,  Sophie Vrzic

    IPC: H04L5/00 ,  H04L1/18 ,  H04W52/34 ,  H04W52/48 ,  H04W72/04 ,  H04W72/12

    Abstract: Various methods and systems are provided for allocating time-frequency resources for downlink (DL) and uplink (UL) communications between base stations and mobile stations. Different forms of resource allocation messages including combinations of bitmaps and bitfields provide additional information about the resources and/or how they are assigned. In some implementations the resource allocation messages enable reduced overhead, which may ultimately improve transmission rates and/or the quality of transmissions.

    Method and System for Combining DFT-Transformed OFDM and Non-Transformed OFDM
    54.
    发明申请
    Method and System for Combining DFT-Transformed OFDM and Non-Transformed OFDM 审中-公开

    公开(公告)号：US20200177422A1

    公开(公告)日：2020-06-04

    申请号：US16780620

    申请日：2020-02-03

    Applicant: Apple Inc.

    Inventor： Jianglei Ma ,  Wen Tong ,  Ming Jia ,  Hua Xu ,  Peiying Zhu ,  Hang Zhang

    IPC: H04L27/26 ,  H04L5/00 ,  H04L1/00

    Abstract: Methods and systems are provided that enable an OFDM transmitter to be used for transmitting conventional OFDM or a form of transformed OFDM. A technique is provided for transforming a coded and modulated sequence of samples prior to an IFFT that enables the transformed sequence of samples to be transmitted using conventional OFDM or transformed OFDM. The selection of a transform function for transforming the coded and modulated sequence of samples may be based on optimizing the transform function for particular operating conditions between the transmitter and receiver. In some embodiments of the invention OFDM and time transformed OFDM are multiplexed in time and/or frequency in a transmission frame. In some embodiments of the invention a pilot pattern is provided in which the pilot are sent using OFDM and data is sent using OFDM and/or transformed OFDM.

    Methods and systems for OFDM using code division multiplexing
    56.
    发明授权
    Methods and systems for OFDM using code division multiplexing 有权

    公开(公告)号：US10541773B2

    公开(公告)日：2020-01-21

    申请号：US16374147

    申请日：2019-04-03

    Applicant: Apple Inc.

    Inventor： Jianglei Ma ,  Ming Jia ,  Wen Tong ,  Peiying Zhu ,  Hua Xu ,  Hang Zhang ,  Mo-Han Fong

    IPC: H04J13/00 ,  H04B7/06 ,  H04L5/00 ,  H04L25/02 ,  H04L27/26 ,  H04B1/707 ,  H04B7/0404 ,  H04W72/04 ,  H04J13/16 ,  H04L25/03

    Abstract: In some embodiments of the invention, OFDM symbols are transmitted as a plurality of clusters. A cluster includes a plurality of OFDM sub-carriers in frequency, over a plurality of OFDM symbol durations in time. Each cluster includes data as well as pilot information as a reference signal for channel estimation. In some embodiments, a plurality of clusters collectively occupy the available sub-carrier set in the frequency domain that is used for transmission. In some embodiments of the invention data and/or pilots are spread within each cluster using code division multiplexing (CDM). In some embodiments pilots and data are separated by distributing data on a particular number of the plurality of OFDM symbol durations and pilots on a remainder of the OFDM symbol durations. CDM spreading can be performed in time and/or frequency directions.

    Pilot symbol patterns for transmission through a plurality of antennas
    58.
    发明授权
    Pilot symbol patterns for transmission through a plurality of antennas 有权

    公开(公告)号：US10476719B2

    公开(公告)日：2019-11-12

    申请号：US16433273

    申请日：2019-06-06

    Applicant: Apple Inc.

    Inventor： Jianglei Ma ,  Ming Jia ,  Wen Tong ,  Peiying Zhu ,  Hang Zhang ,  Hua Xu ,  Dongsheng Yu

    IPC: H04L27/26 ,  H04L25/02 ,  H04L5/00 ,  H04B7/06 ,  H04B7/08 ,  H04W52/32 ,  H04L1/00 ,  H04L1/06

    Abstract: A method and apparatus for improving channel estimation within an OFDM communication system. Channel estimation in OFDM is usually performed with the aid of pilot symbols. The pilot symbols are typically spaced in time and frequency. The set of frequencies and times at which pilot symbols are inserted is referred to as a pilot pattern. In some cases, the pilot pattern is a diagonal-shaped lattice, either regular or irregular. The method first interpolates in the direction of larger coherence (time or frequency). Using these measurements, the density of pilot symbols in the direction of faster change will be increased thereby improving channel estimation without increasing overhead. As such, the results of the first interpolating step can then be used to assist the interpolation in the dimension of smaller coherence (time or frequency).

    Communication of control information using alert flag and version number
    59.
    发明授权
    Communication of control information using alert flag and version number 有权

    公开(公告)号：US10321440B2

    公开(公告)日：2019-06-11

    申请号：US15595404

    申请日：2017-05-15

    Applicant: Apple Inc.

    Inventor： Mo-Han Fong ,  Hang Zhang ,  Sophie Vrzic ,  Robert Novak ,  Jun Yuan ,  Dong-Sheng Yu

    IPC: H04W72/04 ,  H04L5/00 ,  H04L1/18 ,  H04W24/10 ,  H04W72/08 ,  H04W48/12 ,  H04W88/06 ,  H04W48/10 ,  H04W48/14

    Abstract: To effectively and efficiently provide control information, a broadcast pointer channel (BPCH) may be used to identify the type and perhaps relative location of control information that is being provided in a given frame structure, such as a sub-frame, frame, or superframe. A sub-frame (or like framing entity, such a frame or superframe) may have a BPCH and a corresponding system control information segment in which control information may reside. The system control information segment may have any number of control information blocks, wherein each control information block that is present may correspond to a particular type of control information. The BPCH is used to identify the type of control information that is present in a corresponding system control information segment, and if needed or desired, the relative locations of the various control information.

Patent Agency Ranking