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    Precoding in High-Order MIMO
    171.
    发明申请
    Precoding in High-Order MIMO 审中-公开
    高阶MIMO中的预编码

    公开(公告)号：US20160226567A1

    公开(公告)日：2016-08-04

    申请号：US15093924

    申请日：2016-04-08

    Applicant: Apple Inc.

    Inventor： Ming Jia ,  Jianglei Ma ,  Peiying Zhu ,  Wen Tong

    IPC: H04B7/04 ,  H04L25/03

    CPC classification number: H04B7/0456 ,  H04B7/0417 ,  H04B7/0465 ,  H04B7/063 ,  H04L25/03343

    Abstract: A high-order Multiple-Input-Multiple-Output (MIMO) transmitter implementing a covariance-based precoding scheme that exploits transmit channel correlation and a method of operation thereof are provided. In one embodiment, covariance-based precoding is performed at the high-order MIMO transmitter based on feedback from a remote high-order MIMO receiver regarding a covariance-based precoding matrix. The covariance-based precoding matrix is, or is derived from, a transmit channel correlation matrix determined by the high-order MIMO receiver for the high-order MIMO transmitter. The covariance-based precoding provides a beam-forming effect when there is a relatively high degree of transmit channel correlation, thereby improving performance of the high-order MIMO transmitter. Further, because changes in the transmit channel correlation occur relatively slowly over time, feedback overhead requirements are substantially reduced as compared to that required for traditional MIMO precoding schemes.

    Abstract translation: 提供了实现利用发射信道相关的协方差预编码方案的高阶多输入多输出（MIMO）发射机及其操作方法。 在一个实施例中，基于基于协方差的预编码矩阵的来自远程高阶MIMO接收机的反馈在高阶MIMO发射机处执行基于协方差的预编码。 基于协方差的预编码矩阵是由或由高阶MIMO发射机的高阶MIMO接收机确定的发射信道相关矩阵导出的。 当存在相对较高程度的发射信道相关性时，基于协方差的预编码提供波束形成效应，从而提高高阶MIMO发射机的性能。 此外，由于与传统MIMO预编码方案相比，发射信道相关性的变化随时间发生相对较慢，所以反馈开销要求显着降低。

    Distributed ARQ for wireless communication system
    174.
    发明授权
    Distributed ARQ for wireless communication system 有权
    分布式ARQ用于无线通信系统

    公开(公告)号：US09344225B2

    公开(公告)日：2016-05-17

    申请号：US14182075

    申请日：2014-02-17

    Applicant: Apple Inc.

    Inventor： Hang Zhang ,  Peiying Zhu ,  Wen Tong

    IPC: H04B7/14 ,  H04L1/18 ,  H04W8/30 ,  H04W40/22 ,  H04B7/15

    CPC classification number: H04L1/18 ,  H04B7/15 ,  H04W8/30 ,  H04W40/22

    Abstract: Systems and methods for providing distributed Automatic Repeat Request (ARQ) in a wireless communication system are described herein. In one embodiment, a relay station interconnects a base station of the wireless communication system and one or more mobile stations. A first ARQ process is performed for a first connection between the base station and the relay station. A separate second ARQ process is performed for a second connection between the relay station and a mobile station. In this manner, rather than having end-to-end ARQ between the base station and the mobile station, a distributed ARQ process is provided.

    Abstract translation: 在这里描述了用于在无线通信系统中提供分布式自动重传请求（ARQ）的系统和方法。 在一个实施例中，中继站将无线通信系统的基站和一个或多个移动站互连。 对于基站和中继站之间的第一连接执行第一ARQ处理。 针对中继站和移动站之间的第二连接执行单独的第二ARQ处理。 以这种方式，不是在基站和移动台之间具有端对端ARQ，而是提供分布式ARQ过程。

    Efficient location updates, paging and short bursts
    176.
    发明授权
    Efficient location updates, paging and short bursts 有权
    高效的位置更新，寻呼和短脉冲串

    公开(公告)号：US09282535B2

    公开(公告)日：2016-03-08

    申请号：US13666479

    申请日：2012-11-01

    Applicant: Apple Inc.

    Inventor： Hang Zhang ,  Mo-Han Fong ,  Peiying Zhu ,  Wen Tong

    IPC: H04W72/00 ,  H04W68/02

    CPC classification number: H04W68/02 ,  H04L5/0091 ,  H04L5/0092 ,  H04W28/06 ,  H04W72/042

    Abstract: A mobile terminal in a wireless communication network may be one of several modes of operation. When in an idle mode, the mobile terminal may avoid a lengthy random access procedure normally associated with responding to a page from a base station, if the base station includes in the page an indication of a resource that the mobile terminal may utilize when responding to the page. Additionally, the mobile terminal may transmit an efficient location update MAC header to a base station, whether prompted to by a page from the base station or not. Furthermore, without leaving the idle mode or a sleep mode, the mobile terminal may exchange short data burst messages with a base station.

    Abstract translation: 无线通信网络中的移动终端可以是若干操作模式之一。 当处于空闲模式时，如果基站在页面中包括移动终端在响应时可以利用的资源的指示，则移动终端可以避免通常与响应于来自基站的页面相关联的冗长的随机接入过程 这一页。 另外，移动终端可以向基站发送有效的位置更新MAC报头，无论是否由来自基站的页面提示。 此外，在不离开空闲模式或睡眠模式的情况下，移动终端可以与基站交换短数据突发消息。

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