公开(公告)号：US20140348271A1

公开(公告)日：2014-11-27

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

IPC: H04L27/26 ,  H04L5/00 ,  H04L25/02

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.

Abstract translation: 本发明的方面包括用于将数据和导频符号插入具有时域和频域的正交频分复用（OFDM）帧的方法和装置。 一种方法包括在时间和频率上插入数据和导频符号的二维阵列的第一类型的至少一个区域，并在第二类型的至少一个区域中插入时间和频率的数据和导频符号的二维阵列 。 在一些实现中，第一类型的区域包括可由接收OFDM帧的所有接收机检测的公共导频符号。 在一些实施方式中，第二类型的区域包括专用导频符号，其仅可以被知道用于对专用导频符号进行编码的预处理的接收机检测。

公开(公告)号：US20140254545A1

公开(公告)日：2014-09-11

申请号：US14285908

申请日：2014-05-23

Applicant: Apple Inc.

Inventor： Robert Novak ,  Mo-Han Fong ,  Hang Zhang ,  Sophie Vrzic

IPC: H04L5/00 ,  H04W72/04

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.

公开(公告)号：US20130322399A1

公开(公告)日：2013-12-05

申请号：US13673289

申请日：2012-11-09

Applicant: Apple, Inc.

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

IPC: H04W36/18

CPC classification number: H04W36/18 ,  H04B7/022 ,  H04B7/0691

Abstract: Soft handoff in an OFDMA system is disclosed. If the pilot signal strength for a base station exceeds the defined threshold, the base station is added to an active set list. Subcarriers in a plurality of orthogonal frequency division multiplexing (OFDM) symbols are divided and allocated into subchannels. The OFDM symbols are divided and multiplexed. A soft handoff zone with a first dimension of the subchannels and a second dimension of the divided and multiplexed OFDM symbols is defined. The soft handoff zone has subcarriers with a subchannel definition, for example, an identical permutation.

Abstract translation: 披露了OFDMA系统中的软切换。 如果基站的导频信号强度超过定义的阈值，则将基站添加到活动集列表中。 多个正交频分复用（OFDM）符号中的子载波被划分并分配给子信道。 OFDM符号被分割和多路复用。 定义了具有子信道的第一维度和分割和多路复用的OFDM符号的第二维度的软切换区域。 软切换区具有子信道定义的子载波，例如相同的置换。

公开(公告)号：US20130246784A1

公开(公告)日：2013-09-19

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

IPC: H04W12/02

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.

公开(公告)号：US20130231122A1

公开(公告)日：2013-09-05

申请号：US13851188

申请日：2013-03-27

Applicant: APPLE INC.

Inventor： Sophie Vrzic ,  Mo-Han Fong

IPC: H04W72/04

CPC classification number: H04W72/0406 ,  H04W72/042

Abstract: Within a wireless network, a control segment is communicated between a base station and a mobile station, where the control segment is for assigning resources for communication of data in the wireless network. The control segment includes an index that maps to information to enable determination of the assigned resources.

Abstract translation: 在无线网络内，在基站和移动台之间传送控制段，其中控制段用于为无线网络中的数据通信分配资源。 控制段包括映射到信息以使得能够确定所分配的资源的索引。

公开(公告)号：US11258489B2

公开(公告)日：2022-02-22

申请号：US16749687

申请日：2020-01-22

Applicant: APPLE INC.

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

IPC: H04B7/0456 ,  H04B7/06 ,  H04L5/00 ,  H04W48/08 ,  H04B7/0413 ,  H04W72/04 ,  H04W72/08 ,  H04W74/06 ,  H04L5/02 ,  H04L27/26

Abstract: Aspects of the present invention provide additional MAC functionality to support the PHY features of a wireless communication system framework. The additional MAC functionality aids in enabling feedback from wireless terminals to base stations. In some aspects of the invention the feedback is provided on an allocated feedback channel. In other aspects of the invention the feedback is provided by MAC protocol data units (PDU) in a header, mini-header, or subheader. The feedback may be transmitted from the wireless terminal to the base station autonomously by the wireless terminal or in response to an indication from the base station that feedback is requested. Aspects of the invention also provide for allocating feedback resources to form a dedicated feedback channel. One or more of these enhancements is included in a given implementation. Base stations and wireless terminals are also described upon which methods described herein can be implemented.

公开(公告)号：US11153795B2

公开(公告)日：2021-10-19

申请号：US16077455

申请日：2016-09-30

Applicant: Apple Inc.

Inventor： Candy Yiu ,  Yujian Zhang ,  Youn Hyoung Heo ,  Sudeep Palat ,  Mo-Han Fong

IPC: H04W36/02 ,  H04W36/18 ,  H04W36/00

Abstract: User equipment (UE) handover (HO) techniques for reducing or eliminating interruption time during an HO process are described. In one embodiment, for example, an apparatus may include at least one memory and logic for an evolved node B (eNB), at least a portion of the logic comprised in hardware coupled to the at least one memory. The logic may be operative to forward downlink (DL) data received from a serving gateway (SGW) to user equipment (UE), transmit a handover command to the UE to trigger execution of a handover (HO) process to handover the UE to a target eNB, continue forwarding at least a portion of the DL data to the UE following transmission of the handover command, and terminate transmission of the DL data to the UE responsive to detecting a stop DL data event. Other embodiments are described and claimed.

公开(公告)号：US10973011B2

公开(公告)日：2021-04-06

申请号：US16914718

申请日：2020-06-29

Applicant: Apple Inc.

Inventor： Hang Zhang ,  Mo-Han Fong ,  Peiying Zhu ,  Wen Tong

IPC: H04W72/04 ,  H04W68/00 ,  H04W74/08 ,  H04W72/00

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.

公开(公告)号：US10826744B2

公开(公告)日：2020-11-03

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 ,  H04B7/02 ,  H04L5/00 ,  H04W24/02 ,  H04B7/0452 ,  H04L7/04

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-1 and Preamble-2, which may be used in different systems, including multioutput, multi-input (MIMO) systems.

公开(公告)号：US20200314843A1

公开(公告)日：2020-10-01

申请号：US16900954

申请日：2020-06-14

Applicant: Apple Inc.

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

IPC: H04W72/04 ,  H04W74/00 ,  H04W74/08 ,  H04L5/00 ,  H04L27/26 ,  H04J11/00

Abstract: A method and system are provided having an uplink control structure and a pilot signal having minimal signal overhead for providing channel estimation and data demodulation in a wireless communication network. The uplink control structures enable mobile terminals to communicate with corresponding base stations to perform various functions including obtaining initial system access, submitting a bandwidth request, triggering a continuation of negotiated service, or providing a proposed allocation re-configuration header. A dedicated random access channel is provided to communicatively couple the base station and the mobile terminal so that the mobile terminal can select a random access signaling identification. A resource request is received at the base station to uplink resource information from the mobile terminal and an initial access information request is received from the mobile terminal to configure the base station connection. Pilot signals with varying density configurations are provided to include low density symbol patterns for multiple contiguous resource blocks and high density symbol patterns for single resource blocks.