公开(公告)号：US09356679B2

公开(公告)日：2016-05-31

申请号：US14551733

申请日：2014-11-24

Applicant: APPLE INC.

Inventor： Syed Aon Mujtaba ,  Xiaowen Wang ,  Tarik Tabet ,  Kee-Bong Song ,  Youngjae Kim ,  Yuchul Kim

IPC: H04B7/08 ,  H04W52/02 ,  H04B1/18

CPC classification number: H04B7/0814 ,  H04B7/0817 ,  H04B7/0871 ,  H04W52/0209 ,  Y02D70/1262 ,  Y02D70/444

Abstract: Apparatus and methods for implementing “intelligent” receive diversity management in e.g., a mobile device. In one implementation, the mobile device includes an LTE-enabled UE, and the intelligent diversity management includes selectively disabling receive diversity (RxD) in that device upon meeting a plurality of criteria including (i) a capacity criterion, and (ii) a connectivity criterion. In one variant, the capacity criterion includes ensuring that an achievable data rate associated with a single Rx (receive) chain is comparable to that with RxD.

Abstract translation: 在例如移动设备中实现“智能”接收分集管理的装置和方法。 在一个实现中，移动设备包括启用LTE的UE，并且智能分集管理包括在满足多个标准时选择性地禁用该设备中的接收分集（RxD），包括（i）容量标准，和（ii）连接 标准。 在一个变型中，容量标准包括确保与单个Rx（接收）链相关联的可实现的数据速率与RxD的数据速率相当。

公开(公告)号：US20150365977A1

公开(公告)日：2015-12-17

申请号：US14729360

申请日：2015-06-03

Applicant: Apple Inc.

Inventor： Tarik Tabet ,  Youngjae Kim ,  Syed Aon Mujtaba

IPC: H04W74/08 ,  H04W72/04 ,  H04L1/18 ,  H04J13/00 ,  H04W52/34

CPC classification number: H04W74/0833 ,  H04J13/0062 ,  H04L1/189 ,  H04W52/34 ,  H04W72/0406 ,  H04W74/004 ,  Y02B70/30 ,  Y02D70/00 ,  Y02D70/1242 ,  Y02D70/1262 ,  Y02D70/1264 ,  Y02D70/142 ,  Y02D70/144 ,  Y02D70/146 ,  Y02D70/164 ,  Y02D70/168 ,  Y02D70/26

Abstract: Enhanced random access procedures for link-budget-limited user equipment (UE) devices are disclosed. A user equipment device may transmit a first message containing a Physical Random Access Channel (PRACH). The PRACH contains instances of a Zadoff-Chu sequence, and may be transmitted repeatedly as part of a single random attempt, to facilitate correlation data combining at the base station. The available Zadoff-Chu sequences may be partitioned among a plurality of sets, each set being associated with a respective Doppler shift range (or frequency hop pattern or time repetition pattern). A UE device may signal Doppler shift (or other information) to the base station by selection of one of the sets. The first PRACH transmission and the following PRACH transmission may occur in consecutive subframes. A UE device may select from a special set of Zadoff-Chu sequences (different from a conventional set of sequences), to signal its status as a link-budget-limited device.

Abstract translation: 公开了针对链路限制用户设备（UE）设备的增强的随机接入过程。 用户设备设备可以发送包含物理随机接入信道（PRACH）的第一消息。 PRACH包含Zadoff-Chu序列的实例，并且可以作为单个随机尝试的一部分被重复发送，以便于在基站处的相关数据组合。 可用的Zadoff-Chu序列可以在多个集合之间分割，每个集合与相应的多普勒频移范围（或频率跳跃模式或时间重复模式）相关联。 UE设备可以通过选择组中的一个来向基站发信号通知多普勒频移（或其他信息）。 第一PRACH传输和随后的PRACH传输可以在连续的子帧中发生。 UE设备可以从Zadoff-Chu序列的特定集合中选择（与传统的序列集不同），以将其作为链路预算有限的设备的状态发信号。

公开(公告)号：US20150264090A1

公开(公告)日：2015-09-17

申请号：US14626218

申请日：2015-02-19

Applicant: Apple Inc.

Inventor： Youngjae Kim ,  Joonsuk Kim

IPC: H04L29/06 ,  H04W4/16 ,  H04W24/08 ,  H04W72/04

CPC classification number: H04L43/0876 ,  H04L65/1069 ,  H04W4/16 ,  H04W24/08 ,  H04W74/085 ,  H04W84/12

Abstract: This disclosure relates to wireless communication techniques for high short packet density scenarios. According to some embodiments, a wireless device may determine whether a wireless medium is experiencing crowded short packet conditions during a first period of time. The wireless device may select an operational mode from at least a first operational mode and a second operational mode based at least in part on whether the wireless medium is experiencing crowded short packet conditions. The wireless device may perform wireless communication on the wireless medium according to the selected operational mode.

Abstract translation: 本公开涉及用于高短数据包密度情况的无线通信技术。 根据一些实施例，无线设备可以确定无线介质是否在第一时间段期间经历拥挤的短分组条件。 至少部分地基于无线介质是否正在经历拥挤的短分组条件，无线设备可以从至少第一操作模式和第二操作模式选择操作模式。 无线设备可以根据所选择的操作模式在无线介质上执行无线通信。

公开(公告)号：US20140369226A1

公开(公告)日：2014-12-18

申请号：US14472442

申请日：2014-08-29

Applicant: Apple Inc.

Inventor： Syed Aon Mujtaba ,  Kee-Bong Song ,  Yuchul Kim ,  Xiaowen Wang ,  Tarik Tabet ,  Youngjae Kim

IPC: H04W28/04 ,  H04L1/00

CPC classification number: H04W28/048 ,  H04L1/0045 ,  H04L1/0047 ,  H04L1/0053 ,  H04W28/04 ,  H04W52/143 ,  H04W52/241

Abstract: A user device receives packets from a base station. The user device may invoke decoding while the packet is still being received, based on the incomplete contents of a given packet. This “partial packet decoding” relies on the fact that the underlying information in the packet is encoded with redundancy (code rate less than one). If link quality is poor, the partial packet decoding is likely to be unsuccessful, i.e., to fail in its attempt to recover the underlying information. To avoid waste of power, the user device may be configured to apply one or more tests of link quality prior to invoking the partial packet decoding on a current packet.

Abstract translation: 用户设备从基站接收分组。 基于给定分组的不完整内容，用户设备可以在分组仍在接收时调用解码。 这种“部分分组解码”依赖于以冗余（代码率小于1）对分组中的底层信息进行编码的事实。 如果链路质量差，则部分分组解码可能不成功，即在尝试恢复基础信息时失败。 为了避免浪费电力，用户设备可以被配置为在对当前分组调用部分分组解码之前应用一个或多个链路质量测试。

公开(公告)号：US08897731B2

公开(公告)日：2014-11-25

申请号：US13779661

申请日：2013-02-27

Applicant: Apple Inc.

Inventor： Syed Aon Mujtaba ,  Xiaowen Wang ,  Tarik Tabet ,  Kee-Bong Song ,  Youngjae Kim ,  Yuchul Kim

IPC: H04B1/18 ,  H04B7/08 ,  H04W52/02

CPC classification number: H04B7/0814 ,  H04B7/0817 ,  H04B7/0871 ,  H04W52/0209 ,  Y02D70/1262 ,  Y02D70/444

Abstract: Apparatus and methods for implementing “intelligent” receive diversity management in e.g., a mobile device. In one implementation, the mobile device includes an LTE-enabled UE, and the intelligent diversity management includes selectively disabling receive diversity (RxD) in that device upon meeting a plurality of criteria including (i) a capacity criterion, and (ii) a connectivity criterion. In one variant, the capacity criterion includes ensuring that an achievable data rate associated with a single Rx (receive) chain is comparable to that with RxD.

Abstract translation: 在例如移动设备中实现“智能”接收分集管理的装置和方法。 在一个实现中，移动设备包括启用LTE的UE，并且智能分集管理包括在满足多个标准时选择性地禁用该设备中的接收分集（RxD），包括（i）容量标准，和（ii）连接 标准。 在一个变型中，容量标准包括确保与单个Rx（接收）链相关联的可实现的数据速率与RxD的数据速率相当。

公开(公告)号：US20140086164A1

公开(公告)日：2014-03-27

申请号：US13924067

申请日：2013-06-21

Applicant: Apple Inc.

Inventor： Youngjae Kim ,  Kee-Bong Song ,  Syed Aon Mujtaba

IPC: H04W72/12

CPC classification number: H04W72/1278 ,  H04W52/0216 ,  H04W52/0225 ,  H04W52/0274 ,  H04W72/12 ,  H04W88/06 ,  Y02D70/1222 ,  Y02D70/1242 ,  Y02D70/1244 ,  Y02D70/1262 ,  Y02D70/142 ,  Y02D70/144 ,  Y02D70/146

Abstract: Mechanisms for operating a wireless user equipment device, to determine the state of data scheduling activity. Such activity state (and other information such as measurements of signal interference and/or channel condition) may be used to dynamically control the selection of a high-power high-performance receiver vs. a low-power basic receiver. A first mechanism involves transitioning to a high activity state and starting a timer upon each occurrence of scheduled subframe. A transition to the low activity state occurs whenever the timer expires. A second mechanism involves filtering a sequence of binary-valued indicators corresponding respectively to a sequence of time intervals. Each indicator indicates whether a subframe is scheduled during the corresponding time interval. The filter output is compared to a threshold to determine high/low activity state. The temporal width of the filter impulse response may be increased to support fast initial response without harming the accuracy of activity-state determination in the steady state.

Abstract translation: 操作无线用户设备设备的机制，确定数据调度活动的状态。 可以使用这种活动状态（以及诸如信号干扰和/或信道状态的其它信息）来动态地控制大功率高性能接收机与低功率基本接收机的选择。 第一种机制包括转换到高活动状态，并且在每次出现调度子帧时启动定时器。 每当定时器到期时，都会转换到低活动状态。 第二机制包括分别对应于一系列时间间隔的二进制值指示符序列。 每个指示符指示在对应的时间间隔内是否安排子帧。 滤波器输出与阈值进行比较，以确定高/低活动状态。 可以增加滤波器脉冲响应的时间宽度以支持快速初始响应，而不会损害稳态下的活动状态确定的准确性。