公开(公告)号：US09319934B2

公开(公告)日：2016-04-19

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 ,  H04W52/24 ,  H04W52/14

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：US20150365198A1

公开(公告)日：2015-12-17

申请号：US14729285

申请日：2015-06-03

Applicant: Apple Inc.

Inventor： Tarik Tabet ,  Youngjae Kim ,  Syed Aon Mujtaba

IPC: H04L1/18 ,  H04W72/04 ,  H04L5/00

CPC classification number: H04L1/1812 ,  H04L1/1657 ,  H04L1/1671 ,  H04L1/1896 ,  H04L5/0055 ,  H04L5/006 ,  H04W72/042

Abstract: Mobile devices, base stations, and/or relay stations may implement a method for an improved and reliable automatic repeat request feedback indication. A mobile device (UE) may establish communication within a wireless network, and indicate to the network that the UE is a special type device, e.g. a constrained device. The network (base station) may then not send an indication on a physical indicator channel to the UE when certain conditions are met, and instead, the mobile device may interpret control information received from the network on a physical control channel as a negative acknowledgment indication corresponding to an automatic repeat request from the network. The UE may then perform a retransmission according to the interpreted control information. A new control information format may be used to further define how the network and UE implement the automatic repeat request process, to reduce the total number of bits required in the control information.

Abstract translation: 移动设备，基站和/或中继站可以实现用于改进和可靠的自动重发请求反馈指示的方法。 移动设备（UE）可以在无线网络内建立通信，并向网络指示UE是特殊类型的设备，例如， 受限制的设备。 然后，当满足某些条件时，网络（基站）可以不向物理指示符信道发送指示，而替代地，移动设备可以解释在物理控制信道上从网络接收的控制信息作为否定确认指示 对应于来自网络的自动重发请求。 然后，UE可以根据解释的控制信息执行重传。 可以使用新的控制信息格式来进一步定义网络和UE如何实现自动重复请求过程，以减少控制信息中所需的总位数。

公开(公告)号：US08929239B2

公开(公告)日：2015-01-06

申请号：US13664283

申请日：2012-10-30

Applicant: Apple Inc.

Inventor： Tarik Tabet ,  Navid Damji ,  Kee-bong Song ,  S Aon Mujtaba ,  Youngjae Kim ,  Johnson O Sebeni ,  Yuchul Kim

IPC: H04W28/16 ,  H04L12/801 ,  H04W76/02 ,  H04W72/12

CPC classification number: H04W24/10 ,  H04L1/0003 ,  H04L1/0026 ,  H04L43/0823 ,  H04L47/10 ,  H04W72/085 ,  H04W72/1231 ,  H04W72/1284

Abstract: Manipulating modulation and coding scheme (MCS) allocation after a communication interruption. A UE device may resume communications with a BS after a communication interruption. First channel quality information may be generated and transmitted to the BS. A first MCS allocation, which may be based at least in part on the first channel quality information, may be received from the BS. Second channel quality information may be generated and transmitted to the BS, where the second channel quality information is modified by an offset configured to modify a second MCS allocation.

Abstract translation: 在通信中断后操纵调制和编码方案（MCS）分配。 在通信中断之后，UE设备可以恢复与BS的通信。 可以生成第一信道质量信息并将其发送到BS。 可以从BS接收至少部分地基于第一信道质量信息的第一MCS分配。 可以生成第二信道质量信息并将其发送到BS，其中通过被配置为修改第二MCS分配的偏移来修改第二信道质量信息。

公开(公告)号：US20140071844A1

公开(公告)日：2014-03-13

申请号：US14018179

申请日：2013-09-04

Applicant: Apple Inc.

Inventor： Syed A. Mujtaba ,  Kee-Bong Song ,  Youngjae Kim

IPC: H04W52/02

CPC classification number: H04W52/028 ,  H04W52/0245 ,  H04W52/241 ,  H04W52/243 ,  Y02D70/00 ,  Y02D70/1242 ,  Y02D70/1244 ,  Y02D70/1262 ,  Y02D70/142 ,  Y02D70/144

Abstract: In order to reduce power consumption of an electronic device during wireless communication, the electronic device may transition between a baseline (simple) receiver and a higher-power advanced receiver based on network conditions and/or environmental conditions. For example, the transition to the advanced receiver may occur when it offers improved communication performance over the baseline receiver, such as when there is significant interference and a high data rate, or when there is significant interference and a signal-to-noise ratio (SNR) is low. Similarly, the transition to the baseline receiver may occur when the capabilities of the advanced receiver are not needed, such as when there is less interference, or when the data rate is lower and the SNR is high. In this way, the electronic device can avoid the added power consumption associated with the advanced receiver except where the communication performance offered by the advanced receiver is needed.

Abstract translation: 为了在无线通信期间降低电子设备的功耗，电子设备可以基于网络条件和/或环境条件在基线（简单）接收机和较高功率的高级接收机之间转换。 例如，当高级接收机提供比基线接收机更好的通信性能时，例如当存在显着干扰和高数据速率时，或者当存在显着的干扰和信噪比（例如， SNR）低。 类似地，当不需要高级接收机的能力时，例如当干扰较小或数据速率较低且SNR高时，可能会发生向基线接收机的转换。 以这种方式，除了需要高级接收机提供的通信性能之外，电子设备可以避免与高级接收机相关联的附加功率消耗。

公开(公告)号：US20130225094A1

公开(公告)日：2013-08-29

申请号：US13766055

申请日：2013-02-13

Applicant: Apple Inc.

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

IPC: H04W52/02

CPC classification number: H04W52/0209 ,  H04B7/0871 ,  H04B7/0877 ,  H04W52/0238 ,  H04W52/0245 ,  Y02D70/1242 ,  Y02D70/1244 ,  Y02D70/1262 ,  Y02D70/1264 ,  Y02D70/146 ,  Y02D70/24 ,  Y02D70/25 ,  Y02D70/444

Abstract: Methods and apparatus for adaptively adjusting receiver operation for e.g., power optimization. In one embodiment, operation during diversity operation is adaptively adjusted. Diversity techniques consume significantly more power than non-diversity operation. However, the performance gain from receiver diversity is not always predictable. Consequently, in one embodiment, a device evaluates the overall performance gain contributed by diversity operation and, where the performance gain is insignificant or inadequate, the device disables diversity operation. In one implementation, the device can operate in a static single antenna mode, a dynamic single antenna mode and a dynamic multiple antenna mode.

Abstract translation: 用于自适应地调整接收机操作的方法和装置，例如功率优化。 在一个实施例中，自适应地调整分集操作期间的操作。 分集技术比非分集操作消耗更多的功率。 然而，接收机多样性的性能增益并不总是可预测的。 因此，在一个实施例中，设备评估由分集操作贡献的总体性能增益，并且在性能增益不显着或不足的情况下，该设备禁用分集操作。 在一个实现中，该设备可以在静态单天线模式，动态单天线模式和动态多天线模式中操作。

公开(公告)号：US10952144B2

公开(公告)日：2021-03-16

申请号：US16142870

申请日：2018-09-26

Applicant: Apple Inc.

Inventor： Junsung Lim ,  Youngjae Kim ,  Johnson O. Sebeni

IPC: G08C17/00 ,  H04W52/02 ,  H04B1/06 ,  H04L29/08 ,  H04W88/02 ,  H04W72/04

Abstract: This disclosure relates to techniques for opportunistically depowering receiver chains of a wireless device. Based on received control information, a device may determine a depowering time. For example, the device may determine a minimum number of symbols of the payload channel that will provide an effective spectral efficiency less than a supportable spectral efficiency of the payload channel. The depowering time may be determined as a time upon receipt of the determined minimum number of symbols. The device may determine whether to perform a depowering procedure, based upon the determined depowering time. In response to determining to perform the depowering procedure, the device may depower an RF receiver of the device at the depowering time, wherein the depowering time is prior to the end of the payload channel. The device may decode the payload channel based on a portion of the payload channel received by the RF receiver.

公开(公告)号：US10588156B2

公开(公告)日：2020-03-10

申请号：US15989864

申请日：2018-05-25

Applicant: Apple Inc.

Inventor： Tarik Tabet ,  Youngjae Kim ,  Syed Aon Mujtaba

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

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.

公开(公告)号：US20180279381A1

公开(公告)日：2018-09-27

申请号：US15989864

申请日：2018-05-25

Applicant: Apple Inc.

Inventor： Tarik Tabet ,  Youngjae Kim ,  Syed Aon Mujtaba

IPC: H04W74/08

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.

公开(公告)号：US09832788B2

公开(公告)日：2017-11-28

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 ,  H04W52/02 ,  H04W88/06

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.

公开(公告)号：US09628361B2

公开(公告)日：2017-04-18

申请号：US14626218

申请日：2015-02-19

Applicant: Apple Inc.

Inventor： Youngjae Kim ,  Joonsuk Kim

IPC: H04L12/26 ,  H04L29/06 ,  H04W4/16 ,  H04W24/08 ,  H04W74/08 ,  H04W84/12

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.