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公开(公告)号：US09510190B2
公开(公告)日：2016-11-29
申请号：US13766519
申请日：2013-02-13
Applicant: APPLE INC.
Inventor： Hang Zhang , Peiying Zhu , Mo-Han Fong , Wen Tong , Gamini Senarath , Derek Yu , David Steer
CPC classification number: H04W12/02 , H04B7/155 , H04L63/0428 , H04L63/0464 , H04L63/0478 , H04W28/16 , H04W84/18 , H04W88/04 , H04W88/08
Abstract: Security in wireless communication networks that employ relay stations to facilitate communications between base stations and mobile stations is enhanced. In one embodiment, resource information provided to one or more relay stations from a base station or another relay station is encrypted prior to being delivered to the one or more relay stations. Only authorized relay stations are allocated an appropriate key necessary to decrypt the resource information. As such, only appropriate relay stations are able to access and use the resource information to effect communications directly or indirectly between the base stations and the mobile stations. In certain embodiments, the resource information is delivered between the various base and relay stations using either unicast or multicast delivery techniques.
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公开(公告)号：US20160294458A1
公开(公告)日：2016-10-06
申请号：US15175246
申请日：2016-06-07
Applicant: Apple Inc.
Inventor： Wen Tong , Hosein Nikopour , Amir Khandani , Hua Xu , Ming Jia , Peiying Zhu , Dong-sheng Yu
IPC: H04B7/04
CPC classification number: H04B7/0478 , H04B7/0417 , H04B7/0456 , H04B7/0634 , H04B7/0639 , H04L69/04 , H04L69/14
Abstract: A codebook C is provided in a MIMO transmitter as well as a MIMO receiver. The codebook C will include M codewords ci, where i is a unique codeword index for each codeword ci. Each codeword defines weighting factors to apply to the MIMO signals, and may correspond to channel matrices or vectors to apply to the MIMO signals prior to transmission from the respective antennas of the MIMO transmitter. The present invention creates codeword subsets Si for each codeword ci of the codebook C. Each codeword subset Si defines L codewords cj, which are selected from all the codewords ci in the codebook C. The codewords cj in a codeword subset Si are the L codewords in the entire codebook that best correlate with the corresponding codeword ci.
Abstract translation: 码本C被提供在MIMO发射机以及MIMO接收机中。 码本C将包括M个码字ci，其中i是每个码字ci的唯一码字索引。 每个码字定义了应用于MIMO信号的加权因子，并且可以对应于在从MIMO发射机的各个天线发送之前应用于MIMO信号的信道矩阵或向量。 本发明为码本C的每个码字ci创建码字子集Si。每个码字子集Si定义了从码本C中的所有码字ci中选择的L个码字cj。码字子集Si中的码字cj是L个码字 在整个码本中与相应的码字ci最相关。
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公开(公告)号：US09450801B2
公开(公告)日：2016-09-20
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
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。
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公开(公告)号：US09432232B2
公开(公告)日：2016-08-30
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
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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公开(公告)号：US09407487B2
公开(公告)日：2016-08-02
申请号：US14251629
申请日：2014-04-13
Applicant: Apple Inc.
Inventor： Jianglei Ma , Wen Tong , Ming Jia , Hua Xu , Peiying Zhu , Hang Zhang
CPC classification number: H04L27/263 , H04L1/0003 , H04L1/0009 , H04L5/0007 , H04L5/0023 , H04L5/0044 , H04L5/0096 , H04L27/2613 , H04L27/2628 , H04L27/2634 , H04L27/2646
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.
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Patent Agency Ranking
公开(公告)号：US20160183146A1
公开(公告)日：2016-06-23
申请号：US15058381
申请日：2016-03-02
Applicant: Apple Inc.
Inventor： Nimal Senarath , Bill Gage , Shalini Periyalwar , Wen Tong
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.
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237.发明授权公开(公告)号：US09351200B2
公开(公告)日：2016-05-24
申请号：US14623336
申请日：2015-02-16
Applicant: Apple Inc.
Inventor： Hang Zhang , Peiying Zhu , Wen Tong , Nimal Gamini Senarath , Derek Yu , David G. Steer
IPC: H04W4/00 , H04L12/28 , G01R31/08 , H04W28/24 , H04B7/26 , H04L12/46 , H04W76/02 , H04W16/26 , H04W28/18 , H04W84/04
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: A wireless communication access path exists between an ingress station and an egress station. A logical communication tunnel is established between the ingress and egress stations directly or through any number of intermediate relay stations to handle session flows of PDUs. As PDUs arrive, the ingress station may determine and add information bearing on an identified QoS associated with the PDU to the PDUs before they are delivered to the downstream egress station(s) or intermediate relay station(s). The information may be used by the downstream stations to schedule the PDUs for further delivery. The information may also be used by the egress station to schedule the PDUs for delivery.
Abstract translation: 在入站和出站之间存在无线通信接入路径。 直接或通过任意数量的中间中继站在入站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，进入站可以在将PDU发送到下游出口站或中间中继站之前，将与PDU相关联的识别的QoS有关的信息确定并添加到PDU。 该信息可以由下游站使用以调度PDU以进一步传送。 这些信息也可以被出口站用来安排PDU进行传送。
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公开(公告)号：US20160134339A1
公开(公告)日：2016-05-12
申请号：US15000542
申请日：2016-01-19
Applicant: APPLE INC.
Inventor： Wen Tong , Ming Jia , Jianglei Ma , Peiying Zhu , Hua Xu , Dong-Sheng Yu , Hang Zhang , Mo-Han Fong
CPC classification number: H04B7/0478 , H04B7/0413 , H04B7/0617 , H04B7/0619 , H04B7/0671 , H04B7/0673 , H04B7/0691 , H04L5/0007 , H04L5/0023 , H04L5/0028 , H04L5/005 , H04L5/006 , H04L5/023 , H04L27/2601 , H04W48/08 , H04W72/042 , H04W72/044 , H04W72/08 , H04W74/06
Abstract: Systems and methods for closed loop MIMO (multiple input and multiple output) wireless communication are provided. Various transmit formats including spatial multiplexing and STTD are defined in which vector or matrix weighting is employed using information fed back from receivers. The feedback information may include channel matrix or SVD-based feedback.
Abstract translation: 提供了闭环MIMO（多输入和多输出）无线通信的系统和方法。 定义了包括空间复用和STTD在内的各种发送格式，其中使用从接收机反馈的信息的向量或矩阵加权。 反馈信息可以包括信道矩阵或基于SVD的反馈。
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239.发明授权公开(公告)号：US09331880B2
公开(公告)日：2016-05-03
申请号：US14458131
申请日：2014-08-12
Applicant: Apple Inc.
Inventor： Jianglei Ma , Ming Jia , Wen Tong , Peiying Zhu , Hang Zhang , Mo-Han Fong
CPC classification number: H04L5/0051 , H04L1/0003 , H04L1/0009 , H04L1/0618 , H04L5/0007 , H04L5/0023 , H04L5/0048 , H04L5/005 , H04L25/02 , H04L27/2602 , H04L27/2613 , H04L27/2647 , H04W52/325
Abstract: Aspects of the invention include methods and devices for inserting data and pilot symbols into Orthogonal Frequency Division Multiplexing (OFDM) frames having a time domain and a frequency domain. A method involves inserting in at least one zone of a first type a two dimensional array of data and pilot symbols in time and frequency and inserting in at least one zone of a second type a two dimensional array of data and pilot symbols in time and frequency. In some implementations the zone of the first type comprises common pilot symbols that can be detected by all receivers receiving the OFDM frame. In some implementations the zone of the second type comprises dedicated pilot symbols that are only detectable by a receiver that is aware of pre-processing used to encode the dedicated pilot symbols.
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公开(公告)号：US20160099768A1
公开(公告)日：2016-04-07
申请号：US14968070
申请日：2015-12-14
Applicant: Apple Inc.
Inventor： Guo Qiang Wang , Wen Tong , Shiquan Wu
IPC: H04B7/155 , H04L12/823 , H04W76/02 , H04L12/741
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 auto configurable. Mobility for subscriber stations and 10 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可自动配置。 通过VBS的重新配置提供用户站和10个中继站的移动性。
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