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    Method and System for Soft Handoff in Mobile Broadband Systems
    141.
    发明申请
    Method and System for Soft Handoff in Mobile Broadband Systems 有权
    移动宽带系统中软切换的方法与系统

    公开(公告)号：US20130329695A1

    公开(公告)日：2013-12-12

    申请号：US13893157

    申请日：2013-05-13

    Applicant: Apple Inc.

    Inventor： Nimal Senarath ,  Bill Gage ,  Shalini Periyalwar ,  Wen Tong

    IPC: H04W36/18

    CPC classification number: H04W36/18 ,  H04L5/0048 ,  H04W36/0072 ,  H04W36/20 ,  H04W36/24 ,  H04W72/0446 ,  H04W80/02

    Abstract: The present invention provides a method and system for facilitating efficient handoff and data throughput in mobile broadband communication systems. Methods implemented by a system constructed in accordance with the principles of the present invention include selectively enabled soft handoff, performing Layer 2 bearer functions at the base station and using the mobile device to coordinate soft handoff and interference avoidance without the need for a centralized coordination function.

    Abstract translation: 本发明提供了一种用于促进移动宽带通信系统中的有效切换和数据吞吐量的方法和系统。 由根据本发明的原理构造的系统实现的方法包括有选择地启用的软切换，在基站处执行第2层承载功能，并使用移动设备来协调软切换和干扰避免，而不需要集中协调功能 。

    MIMO Based Network Coding Network
    142.
    发明申请
    MIMO Based Network Coding Network 审中-公开
    基于MIMO的网络编码网络

    公开(公告)号：US20130301534A1

    公开(公告)日：2013-11-14

    申请号：US13944282

    申请日：2013-07-17

    Applicant: Apple Inc.

    Inventor： Jun Yuan ,  Wen Tong ,  Mo-Han Fong ,  Jianming Wu

    IPC: H04B7/04

    CPC classification number: H04B7/0452 ,  H04B7/026 ,  H04B7/0697 ,  H04B7/15521

    Abstract: A wireless communication system includes an intermediate node, a first node and a second node. A apparatus for implementing MIMO based network coding, comprises the first node transmitting first data to the intermediate node, and the second node transmitting second data to the intermediate node. Both the first node and the second node may use spatial multiplexing or time division multiplexing or frequency division multiplexing on a common/different resource. The intermediate node receives the transmissions from the first node and second node, and performs network coding on the first data and second data using a predefined network coding scheme to produce network coded information. The intermediate node transmits the network coded information to the first node and second node using multi-user MIMO and each first or second node receives the MIMO transmissions from the intermediate node and applies network decoding procedures to recover the first data and second data.

    Abstract translation: 无线通信系统包括中间节点，第一节点和第二节点。 一种用于实现基于MIMO的网络编码的装置，包括：第一节点向中间节点发送第一数据，第二节点向第二节点发送第二数据。 第一节点和第二节点都可以在公共/不同资源上使用空间复用或时分复用或频分复用。 中间节点接收来自第一节点和第二节点的传输，并且使用预定义的网络编码方案对第一数据和第二数据执行网络编码以产生网络编码信息。 中间节点使用多用户MIMO将网络编码信息发送到第一节点和第二节点，并且每个第一或第二节点从中间节点接收MIMO传输，并应用网络解码过程来恢复第一数据和第二数据。

    METHOD AND SYSTEM FOR A WIRELESS MULTI-HOP RELAY NETWORK
    144.
    发明申请
    METHOD AND SYSTEM FOR A WIRELESS MULTI-HOP RELAY NETWORK 有权
    无线多路继电器网络的方法和系统

    公开(公告)号：US20130142109A1

    公开(公告)日：2013-06-06

    申请号：US13757416

    申请日：2013-02-01

    Applicant: Apple, Inc.

    Inventor： Guo Qiang Wang ,  Wen Tong ,  Shiquan Wu

    IPC: H04W40/22

    CPC classification number: H04B7/15592 ,  H04B7/155 ,  H04B7/2606 ,  H04L45/54 ,  H04L45/586 ,  H04L45/745 ,  H04L47/32 ,  H04W40/12 ,  H04W40/22 ,  H04W40/24 ,  H04W76/12

    Abstract: In a wireless multi-hop relay network arranged in a tree topology, the base station and one or more relay stations are associated as a virtual base station (VBS). The base station and each relay station have a unique virtual base station identifier (VBS-ID) associated with the path defined by the base station and the one or more relay stations. a relay station in the branch uses its VBS-ID for communicating with an attached subscriber station (e.g. a mobile station) such that communications between the base station and subscriber station occur via the VBS. Subscriber station data communications are relayed between the base station and the one or more relay stations over the VBS via a tunnel connection. The VBS is autoconfigurable. Mobility for subscriber stations and relay stations is provided through reconfiguration of VBS's.

    Abstract translation: 在以树形拓扑布置的无线多跳中继网络中，基站和一个或多个中继站作为虚拟基站（VBS）相关联。 基站和每个中继站具有与由基站和一个或多个中继站定义的路径相关联的唯一的虚拟基站标识符（VBS-ID）。 分支中的中继站使用其VBS-ID与附加的用户站（例如，移动站）进行通信，使得基站和用户站之间的通信经由VBS发生。 订户站数据通信通过隧道连接在VBS之间在基站和一个或多个中继站之间中继。 VBS是可自动配置的。 通过VBS的重新配置提供用户站和中继站的移动性。

    Preambles in OFDMA System
    146.
    发明申请
    Preambles in OFDMA System 有权
    OFDMA系统中的前言

    公开(公告)号：US20130077469A1

    公开(公告)日：2013-03-28

    申请号：US13680209

    申请日：2012-11-19

    Applicant: APPLE INC.

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

    IPC: H04W24/02

    CPC classification number: H04L27/2692 ,  H04B7/02 ,  H04B7/0452 ,  H04L5/0007 ,  H04L5/0023 ,  H04L5/0048 ,  H04L7/043 ,  H04L27/2613 ,  H04L27/265 ,  H04L27/2655 ,  H04L27/2686 ,  H04W24/02

    Abstract: The present invention provides a preamble that is inserted into an OFDMA frame and has a common sequence for all the base stations participating in a transmission. The subscriber station performs fine synchronization using the common sequence on the common preamble, and the resulting peaks will provide the locations of candidate base stations. The base station specific search is then performed in the vicinities of those peaks by using base station specific pseudo-noise sequences. With this two stage cell search, the searching window is drastically reduced. The preamble is matched to known values by a respective receiver to decode the signals and permit multiple signals to be transferred from the transmitter to the receiver. The preamble may comprise two parts, Preamble-I and Preamble-2, which may be used in different systems, including multioutput, multi-input (MIMO) systems.

    Abstract translation: 本发明提供插入到OFDMA帧中并具有参与传输的所有基站的公共序列的前同步码。 用户站使用公共前导码上的公共序列执行精细同步，并且所得到的峰值将提供候选基站的位置。 然后通过使用基站专用伪噪声序列，在那些峰附近执行基站专用搜索。 通过这两个阶段的单元格搜索，搜索窗口大大减少。 前导码由相应的接收机与已知值匹配以对信号进行解码，并允许多个信号从发射机传送到接收机。 前导码可以包括两个部分，即前导码1和前导码2，其可以在不同的系统中使用，包括多输入多输入（MIMO）系统。

    Quality of Service Control in Multiple Hop Wireless Communication Environments
    147.
    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。

    Method and System for Combining DFT-Transformed OFDM and Non-Transformed OFDM
    148.
    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
    149.
    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
    150.
    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).

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