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    Uplink control in a wireless communication network
    41.
    发明授权
    Uplink control in a wireless communication network 有权

    公开(公告)号：US11425713B2

    公开(公告)日：2022-08-23

    申请号：US16900954

    申请日：2020-06-14

    Applicant: Apple Inc.

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

    IPC: H04W4/00 ,  H04W72/04 ,  H04W74/00 ,  H04W74/08 ,  H04L5/00 ,  H04L27/26 ,  H04J11/00 ,  H04W84/12 ,  H04W88/08 ,  H04W88/12

    Abstract: A method and system are provided having an uplink control structure and a pilot signal having minimal signal overhead for providing channel estimation and data demodulation in a wireless communication network. The uplink control structures enable mobile terminals to communicate with corresponding base stations to perform various functions including obtaining initial system access, submitting a bandwidth request, triggering a continuation of negotiated service, or providing a proposed allocation re-configuration header. A dedicated random access channel is provided to communicatively couple the base station and the mobile terminal so that the mobile terminal can select a random access signaling identification. A resource request is received at the base station to uplink resource information from the mobile terminal and an initial access information request is received from the mobile terminal to configure the base station connection. Pilot signals with varying density configurations are provided to include low density symbol patterns for multiple contiguous resource blocks and high density symbol patterns for single resource blocks.

    Communication of Control Information Using Alert Flag and Version Number
    42.
    发明申请
    Communication of Control Information Using Alert Flag and Version Number 有权

    公开(公告)号：US20220248389A1

    公开(公告)日：2022-08-04

    申请号：US17725795

    申请日：2022-04-21

    Applicant: Apple Inc.

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

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

    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.

    Methods and systems for HARQ protocols
    44.
    发明授权
    Methods and systems for HARQ protocols 有权

    公开(公告)号：US10686561B2

    公开(公告)日：2020-06-16

    申请号：US16004740

    申请日：2018-06-11

    Applicant: Apple Inc.

    Inventor： Mo-han Fong ,  Sophie Vrzic ,  Robert Novak ,  Jun Yuan ,  Dong-Sheng Yu

    IPC: H04W72/04 ,  H04L1/18 ,  H04W72/12 ,  H04W72/00 ,  H04L5/14 ,  H04L5/00 ,  H04L1/00 ,  H04L27/26 ,  H04W88/04 ,  H04W88/06 ,  H04W28/04

    Abstract: Methods described herein are for wireless communication systems. One aspect of the invention is directed to a method for a HARQ process, in which the HARQ process includes a first transmission of an encoder packet and at least one retransmission. The method involves allocating a transmission resource for each respective transmission. The method involves transmitting control information from a base station to a mobile station for each respective transmission. The control information includes information to uniquely identify the HARQ process and an identification of one of a time resource, a frequency resource and a time and frequency resource that is allocated for the transmission. In some embodiments of the invention, specific control information is signalled from a base station to a mobile station to enable RAS-HARQ operation. In some embodiments of the invention, retransmission signaling in included as part of regular unicast signaling used for both first transmission and retransmissions. In some embodiments of the invention, a 3-state acknowledgement channel and associated error recovery operation enables the base station and mobile station to recover from control signaling error and reduce packet loss.

    PILOT SYMBOL PATTERNS FOR TRANSMIT ANTENNAS
    50.
    发明申请
    PILOT SYMBOL PATTERNS FOR TRANSMIT ANTENNAS 审中-公开
    发射天线的引导符号模式

    公开(公告)号：US20160164706A1

    公开(公告)日：2016-06-09

    申请号：US15046934

    申请日：2016-02-18

    Applicant: Apple Inc.

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

    IPC: H04L27/26 ,  H04B7/08 ,  H04L5/00 ,  H04B7/06

    CPC classification number: H04L27/2611 ,  H04B7/06 ,  H04B7/08 ,  H04L5/0007 ,  H04L5/0023 ,  H04L25/0226 ,  H04L25/0232 ,  H04L27/2626 ,  H04L27/2647

    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).

    Abstract translation: 一种用于改善OFDM通信系统内的信道估计的方法和装置。 OFDM中的信道估计通常借助于导频符号来执行。 导频符号通常在时间和频率上间隔开。 将导频符号插入的频率和时间的集合称为导频模式。 在一些情况下，导频图案是对角线形格子，规则的或不规则的。 该方法首先在较大相干性（时间或频率）的方向内插。 使用这些测量，导频符号在更快变化方向上的密度将增加，从而改善信道估计而不增加开销。 因此，第一内插步骤的结果然后可以用于辅助尺寸较小的相干性（时间或频率）的内插。

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