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公开(公告)号：US20180152331A1
公开(公告)日：2018-05-31
申请号：US15823072
申请日：2017-11-27
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.
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公开(公告)号：US20170331659A1
公开(公告)日：2017-11-16
申请号：US15642956
申请日：2017-07-06
Applicant: Apple Inc.
Inventor： Jianglei Ma , Ming Jia , Wen Tong , Peiying Zhu , Hang Zhang , Hua Xu , DongSheng 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).
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公开(公告)号：US09723636B2
公开(公告)日：2017-08-01
申请号：US15382930
申请日：2016-12-19
Applicant: Apple Inc.
Inventor： Jianglei Ma , Hua Xu , Ming Jia , Sarah Boumendil , Evelyne Le Strat , Hang Zhang , Peiying Zhu , Wen Tong
CPC classification number: H04W74/0891 , H04L1/06 , H04L1/0618 , H04L5/023 , H04L27/2627 , H04L27/2657 , H04L27/2662 , H04W74/006 , H04W74/0866
Abstract: Physical layer structures and access schemes for use in such networks are described and in particular initial access channel (IACH) structures are proposed. A spectrum efficient downlink (DL) IACH design supports different types of User Equipment (UE) capabilities and different system bandwidths. An IACH includes the synchronization channel (SCH) and broadcast-control channel (BCH). A non-uniform SCH for all system bandwidths is provided, as well as scalable bandwidth BCH depending on system bandwidth. An initial access procedure is provided, as well as an access procedure.
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公开(公告)号：US20170207888A1
公开(公告)日：2017-07-20
申请号：US15473768
申请日：2017-03-30
Applicant: Apple Inc.
Inventor： Robert Novak , Mo-Han Fong , Hang Zhang , Sophie Vrzic
CPC classification number: H04L5/0005 , H04L1/1812 , H04L1/1893 , H04L5/0044 , H04W52/34 , H04W52/48 , H04W72/04 , H04W72/042 , H04W72/0446 , H04W72/0453 , H04W72/12
Abstract: Various methods and systems are provided for allocating time-frequency resources for downlink (DL) and uplink (UL) communications between base stations and mobile stations. Different forms of resource allocation messages including combinations of bitmaps and bitfields provide additional information about the resources and/or how they are assigned. In some implementations the resource allocation messages enable reduced overhead, which may ultimately improve transmission rates and/or the quality of transmissions.
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155.发明申请公开(公告)号：US20170195097A1
公开(公告)日：2017-07-06
申请号：US15463202
申请日：2017-03-20
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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Patent Agency Ranking
公开(公告)号：US09686681B2
公开(公告)日：2017-06-20
申请号：US15291586
申请日：2016-10-12
Applicant: Apple Inc.
Inventor： Hang Zhang , Peiying Zhu , Wen Tong , Nimal Gamini Senarath , Derek Yu
IPC: H04W12/04 , H04W76/04 , H04W76/02 , H04L29/06 , H04W12/06 , H04W84/04 , H04W88/04 , H04W16/26 , H04B7/155 , H04W12/02 , H04W72/00
CPC classification number: H04W12/04 , H04B7/155 , H04L63/06 , H04L63/083 , H04W12/02 , H04W12/06 , H04W16/26 , H04W72/00 , H04W76/10 , H04W76/11 , H04W76/20 , H04W84/047 , H04W88/04
Abstract: Methods and systems for providing efficient communications between two mobile stations served by the same base station or relay station are provided. A base station maintains information identifying which mobile stations it is serving. When a connection is set up between two mobile stations, if they are both being served by the same base station, the base station forwards traffic directly between the two mobile stations without forwarding it on to higher level network entities.
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公开(公告)号：US09686061B2
公开(公告)日：2017-06-20
申请号：US13944365
申请日：2013-07-17
Applicant: Apple Inc.
Inventor： Jianglei Ma , Hang Zhang , Ming Jia , Wen Tong , Hua Xu , Peiying Zhu
IPC: H04W52/14 , H04L5/00 , H04B7/155 , H04L5/14 , H04L25/20 , H04W72/04 , A61K45/06 , A61K9/20 , A61K9/24 , A61K31/455 , A61K31/54 , H04W84/04 , A61K9/28 , A61K9/50
CPC classification number: H04L5/0039 , A61K9/2081 , A61K9/209 , A61K9/2886 , A61K9/5026 , A61K9/5073 , A61K9/5084 , A61K31/455 , A61K31/54 , A61K45/06 , H04B7/15542 , H04L5/0007 , H04L5/003 , H04L5/14 , H04L25/20 , H04W52/143 , H04W72/0453 , H04W84/047 , A61K2300/00
Abstract: International Mobile Telecommunications (IMT) Advanced technology, also known as 4th Generation (4G) targets to support up to 100 MHz BW. LTE currently supports single carrier bandwidths of up to 20 MHz. The present application describes a multi-carrier approach in which some embodiments of the invention provide a simple solution of aggregating multiple single carrier bandwidths to obtain a wider bandwidth (>20 MHz). Such an approach may extend Long Term Evolution (LTE) bandwidth to greater than that provided by a single carrier, yet maintain full backward compatibility with technologies that predate 4G technology and utilize smaller, single carrier bandwidths. More generally, embodiments of the invention can apply to other communication standards than only LTE.
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公开(公告)号：US09634817B2
公开(公告)日：2017-04-25
申请号：US14456993
申请日：2014-08-11
Applicant: APPLE INC.
Inventor： Hang Zhang , Mo-Han Fong , Peiying Zhu , Wen Tong
IPC: H04W4/00 , H04L5/00 , H04L1/16 , H04L1/18 , H04L9/08 , H04L9/30 , H04W12/02 , H04L27/26 , H04L1/00 , H04L1/06 , H04W12/04
CPC classification number: H04L5/0055 , H04L1/0003 , H04L1/0009 , H04L1/0026 , H04L1/0067 , H04L1/0071 , H04L1/0643 , H04L1/1671 , H04L1/1812 , H04L1/1819 , H04L1/1822 , H04L1/1861 , H04L1/1887 , H04L1/189 , H04L1/1896 , H04L9/0891 , H04L9/30 , H04L27/2601 , H04L27/2602 , H04L2209/80 , H04W12/02 , 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：US09629155B2
公开(公告)日：2017-04-18
申请号：US15082523
申请日：2016-03-28
Applicant: Apple Inc.
Inventor： Hang Zhang , Jianglei Ma , Ming Jia , Sophie Vrzic , Mo-Han Fong , Dong-Sheng Yu , Hua Xu
IPC: H04W28/04 , H04W72/04 , H04B7/12 , H04L5/00 , H04L25/02 , H04L29/06 , H04B7/06 , H04L1/00 , H04L1/06 , H04L1/18 , H04L25/03 , H04L27/26
CPC classification number: H04W72/0446 , H04B7/02 , H04B7/0669 , H04B7/12 , H04L1/0003 , H04L1/0009 , H04L1/0026 , H04L1/0071 , H04L1/0656 , H04L1/1812 , H04L1/1887 , H04L5/0007 , H04L5/0023 , H04L5/0039 , H04L5/0041 , H04L5/0042 , H04L5/0046 , H04L5/0048 , H04L5/0051 , H04L5/0053 , H04L5/006 , H04L5/0085 , H04L5/0096 , H04L25/0226 , H04L25/0228 , H04L25/03057 , H04L27/2627 , H04L27/2655 , H04L65/1066 , H04W72/0453
Abstract: Systems and methods for OFDM channelization are provided that allow for the coexistence of sub-band channels and diversity channels. Methods of defining diversity sub-channels and sub-band sub-channels are provided and systematic channel definition and labeling schemes are provided.
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公开(公告)号：US09485792B2
公开(公告)日：2016-11-01
申请号：US14918690
申请日：2015-10-21
Applicant: Apple Inc.
Inventor： Hang Zhang , Peiying Zhu , Wen Tong , Nimal Gamini Senarath , Derek Yu
CPC classification number: H04W12/04 , H04B7/155 , H04L63/06 , H04L63/083 , H04W12/02 , H04W12/06 , H04W16/26 , H04W72/00 , H04W76/10 , H04W76/11 , H04W76/20 , H04W84/047 , H04W88/04
Abstract: Methods and systems for providing efficient communications between two mobile stations served by the same base station or relay station are provided. A base station maintains information identifying which mobile stations it is serving. When a connection is set up between two mobile stations, if they are both being served by the same base station, the base station forwards traffic directly between the two mobile stations without forwarding it on to higher level network entities.
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