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

IPC: H04J13/00 ,  H04L5/00 ,  H04W72/04 ,  H04L27/26 ,  H04B7/0404 ,  H04B1/707 ,  H04L25/02 ,  H04B7/06

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.

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.

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.

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

IPC: H04L27/26 ,  H04L25/02 ,  H04L5/00 ,  H04B7/06 ,  H04B7/08 ,  H04W52/32

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).

公开(公告)号：US10397960B2

公开(公告)日：2019-08-27

申请号：US15664431

申请日：2017-07-31

Applicant: Apple Inc.

Inventor： Jianglei Ma ,  Hua Xu ,  Ming Jia ,  Sarah Boumendil ,  Evelyne Le Strat ,  Hang Zhang ,  Peiying Zhu ,  Wen Tong

IPC: H04W74/08 ,  H04L1/06 ,  H04L5/02 ,  H04L27/26 ,  H04W74/00

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.

公开(公告)号：US20190253190A1

公开(公告)日：2019-08-15

申请号：US16397152

申请日：2019-04-29

Applicant: APPLE INC.

Inventor： Robert Novak ,  Hang Zhang ,  Sophie Vrzic ,  Mo-Han Fong ,  Kelvin Kar-Kin Au ,  Jianglei Ma ,  Peiying Zhu ,  Wen Tong

IPC: H04L1/00 ,  H04L5/00 ,  H04L29/06 ,  H04L1/16 ,  H04L1/14 ,  H04L1/18

CPC classification number: H04L1/0067 ,  H04L1/0013 ,  H04L1/0025 ,  H04L1/14 ,  H04L1/1614 ,  H04L1/1867 ,  H04L5/0007 ,  H04L5/0037 ,  H04L5/0042 ,  H04L5/0046 ,  H04L5/0064 ,  H04L29/06027 ,  H04L65/607 ,  H04L65/80 ,  H04L2001/0093

Abstract: Methods and systems are provided for allocating resources including VoIP (voice over Internet Protocol) and Non-VoIP resources. In some embodiments, multiplexing schemes are provided for use with OFDMA (orthogonal frequency division multiplexing access) systems, for example for use in transmitting VoIP traffic. In some embodiments, various HARQ (Hybrid Automatic request) techniques are provided for use with OFDMA systems. In various embodiments, there are provided methods and systems for dealing with issues such as Handling non-full rate vocoder frames, VoIP packet jitter handling, VoIP capacity increasing schemes, persistent and non-persistent assignment of resources in OFDMA systems.

公开(公告)号：US10349229B2

公开(公告)日：2019-07-09

申请号：US15730111

申请日：2017-10-11

Applicant: Apple Inc.

Inventor： Jianglei Ma ,  Aaron Callard ,  Ming Jia ,  Wen Tong ,  Peiying Zhu ,  Hang Zhang

IPC: H04W4/06 ,  H04W72/00 ,  H04B7/06 ,  H04L5/00 ,  H04W36/00 ,  H04W36/30 ,  H04B7/0413

Abstract: Systems and methods are disclosed herein for an enhanced Multimedia Broadcast Multicast Service (MBMS) in a wireless communications network. In one embodiment, a number of base stations in a MBMS zone, or broadcast region, accommodate both Spatial Multiplexing (SM) enabled user elements and non-SM enabled user elements. In another embodiment, a number of base stations form a MBMS zone, or broadcast region, where the MBMS zone is sub-divided into an SM zone and a non-SM zone. In another embodiment, the wireless communications network includes multiple MBMS zones. For each MBMS zone, base stations serving the MBMS zone transmit an MBMS zone identifier (ID) for the MBMS zone. The MBMS zone ID may be used by a user element for decoding and/or to determine when to perform a handoff from one MBMS zone to another.

公开(公告)号：US10348542B2

公开(公告)日：2019-07-09

申请号：US16255702

申请日：2019-01-23

Applicant: Apple Inc.

Inventor： Jianglei Ma ,  Ming Jia ,  Wen Tong ,  Peiying Zhu ,  Hang Zhang ,  Hua Xu ,  Dongsheng Yu

IPC: H04L27/26 ,  H04L5/00 ,  H04B7/08 ,  H04B7/06 ,  H04L25/02

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).

公开(公告)号：US20190200338A1

公开(公告)日：2019-06-27

申请号：US16289902

申请日：2019-03-01

Applicant: Apple Inc.

Inventor： Mo-Han Fong ,  Hang Zhang ,  Sophie Vrzic ,  Robert Novak ,  Jun Yuan ,  Dong-Sheng Yu

IPC: H04W72/04 ,  H04W72/08 ,  H04L1/18 ,  H04L5/00 ,  H04W24/10 ,  H04W48/12

CPC classification number: H04W72/0406 ,  H04L1/1812 ,  H04L5/0055 ,  H04L5/0057 ,  H04W24/10 ,  H04W48/10 ,  H04W48/12 ,  H04W48/14 ,  H04W72/042 ,  H04W72/0446 ,  H04W72/0453 ,  H04W72/085 ,  H04W88/06

Abstract: To effectively and efficiently provide control information, a broadcast pointer channel (BPCH) may be used to identify the type and perhaps relative location of control information that is being provided in a given frame structure, such as a sub-frame, frame, or superframe. A sub-frame (or like framing entity, such a frame or superframe) may have a BPCH and a corresponding system control information segment in which control information may reside. The system control information segment may have any number of control information blocks, wherein each control information block that is present may correspond to a particular type of control information. The BPCH is used to identify the type of control information that is present in a corresponding system control information segment, and if needed or desired, the relative locations of the various control information.

公开(公告)号：US20190173722A1

公开(公告)日：2019-06-06

申请号：US16249672

申请日：2019-01-16

Applicant: APPLE INC.

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

IPC: H04L27/26 ,  H04L5/00 ,  H04B7/0452 ,  H04B7/02 ,  H04L7/04 ,  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.