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公开(公告)号：US20130064154A1
公开(公告)日：2013-03-14
申请号：US13666426
申请日：2012-11-01
Applicant: Apple Inc.
Inventor： Hang Zhang , Mo-Han Fong , Peiying Zhu , Wen Tong
CPC classification number: H04W72/0413 , H04W68/00 , H04W74/0866
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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公开(公告)号：US11032119B2
公开(公告)日：2021-06-08
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
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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公开(公告)号：US10959227B2
公开(公告)日：2021-03-23
申请号：US15823120
申请日：2017-11-27
Applicant: APPLE INC.
Inventor： Hang Zhang , Mo-Han Fong , Peiying Zhu , Wen Tong , Jianglei Ma
Abstract: A channel descriptor management message is transmitted on a broadcast connection to a mobile terminal. The channel descriptor management message provides a format for a frame. The frame includes a resource space. The channel descriptor management message defines a plurality of channels within the resource space and allocates at least one of the channels to a plurality of users. Subsequent resource allocation messages may refer to a location within a channel rather than a location within the entire resource space.
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公开(公告)号：US20200329472A1
公开(公告)日：2020-10-15
申请号：US16914718
申请日：2020-06-29
Applicant: Apple Inc.
Inventor： Hang Zhang , Mo-Han FONG , Peiying ZHU , Wen Tong
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.
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公开(公告)号：US20200119827A1
公开(公告)日：2020-04-16
申请号：US16716845
申请日：2019-12-17
Applicant: Apple Inc.
Inventor： Jianglei Ma , Ming Jia , Wen Tong , Peiying Zhu , Hua Xu , Hang Zhang , Mo-Han Fong
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.
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Patent Agency Ranking
公开(公告)号：US10595249B2
公开(公告)日：2020-03-17
申请号：US15982089
申请日：2018-05-17
Applicant: Apple Inc.
Inventor： Jianglei Ma , Ming Jia , Peiying Zhu , Wen Tong
IPC: H04W36/08 , H04B7/06 , H04L5/00 , H04L27/26 , H04J11/00 , H04B7/022 , H04L7/00 , H04B7/0413 , H04B7/04
Abstract: A method and apparatus are provided for performing acquisition, synchronization and cell selection within an MIMO-OFDM communication system. A coarse synchronization is performed to determine a searching window. A fine synchronization is then performed by measuring correlations between subsets of signal samples, whose first signal sample lies within the searching window, and known values. The correlations are performed in the frequency domain of the received signal. In a multiple-output OFDM system, each antenna of the OFDM transmitter has a unique known value. The known value is transmitted as pairs of consecutive pilot symbols, each pair of pilot symbols being transmitted at the same subset of sub-carrier frequencies within the OFDM frame.
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公开(公告)号：US10560159B2
公开(公告)日：2020-02-11
申请号：US16151636
申请日：2018-10-04
Applicant: Apple Inc.
Inventor： Jianglei Ma , Ming Jia , Hua Xu , Wen Tong , Peiying Zhu , Moussa Abdi
IPC: H04W4/00 , H04B7/0452 , H04L5/00 , H04L27/26 , H04W72/04 , H04B7/0413 , H04W88/08 , H04J13/18 , H04L1/06 , H04L25/02 , H04J13/16
Abstract: The present invention employs a pilot scheme for frequency division multiple access (FDM) communication systems, such as single carrier FDM communication systems. A given transmit time interval will include numerous traffic symbols and two or more short pilot symbols, which are spaced apart from one another by at least one traffic symbol and will have a Fourier transform length that is less than the Fourier transform length of any given traffic symbol. Multiple transmitters will generate pilot information and modulate the pilot information onto sub-carriers of the short pilot symbols in an orthogonal manner. Each transmitter may use different sub-carriers within the time and frequency domain, which is encompassed by the short pilot symbols within the transmit time interval. Alternatively, each transmitter may uniquely encode the pilot information using a unique code division multiplexed code and modulate the encoded pilot information onto common sub-carriers of the short pilot symbols.
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公开(公告)号：US10470164B2
公开(公告)日：2019-11-05
申请号：US13784158
申请日：2013-03-04
Applicant: Apple Inc.
Inventor： Hang Zhang , Jianglei Ma , Ming Jia , Mo-Han Fong , Peiying Zhu , Wen Tong
IPC: H04W72/04 , H04W72/00 , H04W74/00 , H04L12/18 , H04W4/08 , H04W48/10 , H04B7/0413 , H04L1/18 , H04L27/26 , H04L29/12 , H04L5/02
Abstract: A method and system for allocating shareable wireless transmission resources. A resource pool is established. The resource pool is divided into a plurality of physical layer allocation units usable for wirelessly transmitting control information and traffic data. The allocation units are assigned at the media access control layer for the wireless transmission of the control information and traffic data. The system and method of the present invention also allows mobile stations to be dynamically grouped into multicast groupings to reduce system overhead resource requirements.
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公开(公告)号：US10439784B2
公开(公告)日：2019-10-08
申请号：US15494804
申请日：2017-04-24
Applicant: APPLE INC.
Inventor： Hang Zhang , Mo-Han Fong , Peiying Zhu , Wen Tong
IPC: H04L5/00 , H04L1/16 , H04L1/18 , H04L27/26 , H04L9/08 , H04L9/30 , H04W12/02 , H04W12/00 , H04L1/00 , H04L1/06 , H04W12/04
Abstract: Systems and methods are provided for enabling H-ARQ communication between a base station and one or more wireless terminals. Methods for enabling incremental redundancy (IR) based H-ARQ, Chase based H-ARQ and Space-Time Code combining (STC) based H-ARQ between devices for down-link and up-link direction transmissions are provided in the form of an information element (IE) for use with a Normal MAP convention as currently accepted in the draft version standard of IEEE 802.16. In addition, embodiments of the invention provide a resource management scheme to protect a network from abuse of resources from a wireless terminal not registered with the network. Components of the down-link and up-link mapping components of a data frame transmitted from the base station to one or more wireless terminals included messages that are readable by all wireless terminals as well as some messages that are encrypted and only readable by wireless terminals that are authenticated as being registered with the network.
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公开(公告)号：US20190288893A1
公开(公告)日：2019-09-19
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
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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