公开(公告)号：US11490397B2

公开(公告)日：2022-11-01

申请号：US16591542

申请日：2019-10-02

Applicant: Apple Inc.

Inventor： Wanping Zhang ,  Sachin J. Sane ,  Faraz Faheem ,  Wei Zhang ,  Dawei Zhang ,  Wei Zeng ,  Haitong Sun ,  Yuqin Chen ,  Haijing Hu ,  Ping Wang

IPC: H04W72/10 ,  H04W74/00 ,  H04W76/27 ,  G05D1/02 ,  G05D1/00 ,  H04W4/40 ,  H04W76/28 ,  H04W4/029 ,  G08G1/16 ,  H04W4/02 ,  H04W8/08 ,  H04W52/02 ,  H04W72/12

Abstract: Embodiments are presented herein for adjusting the conduct of routine communications of safety messages in V2X networks in order to conserve resources in participating power-limited devices while satisfying V2X system latency demands. Scheduling (e.g., timing and/or frequency) of safety message communications performed by certain UE devices participating in a V2X network may be dynamically adjusted according to various criteria, such as factors relating to the DRX cycle schedule, motion or mobility, traffic environment, and/or battery or power capabilities of the UE devices, which may conserve UE resources and power consumption. Certain UE devices may efficiently transmit safety messages to the V2X network using one of several proposed RACH-based procedures. In some embodiments, the size of safety message communications may be reduced through various compression techniques, and/or by reducing the amount of contained information, e.g., by omitting certain parameters, which may reduce the resources consumed by performing safety message communications.

公开(公告)号：US20210266801A1

公开(公告)日：2021-08-26

申请号：US17178121

申请日：2021-02-17

Applicant: Apple Inc.

Inventor： Sagar B. Shah ,  Alosious Pradeep Prabhakar ,  Kanuganti Rajeswar Reddy ,  Lakshmi N. Kavuri ,  Li Su ,  Manish G. Vemulapalli ,  Muthukumaran Dhanapal ,  Ozgur Ekici ,  Rangakrishna Nallandigal ,  Sachin J. Sane ,  Shivani Suresh Babu ,  Sree Ram Kodali ,  Srinivasan Nimmala ,  Vijay Venkataraman ,  Yifan Zhu

IPC: H04W36/00 ,  H04W48/20 ,  H04W8/24 ,  H04W24/10 ,  H04B17/318 ,  H04B17/336 ,  H04W76/27 ,  H04L27/26

Abstract: Apparatuses, systems, and methods for a user equipment device (UE) to prioritize cells that support EN-DC over similar cells not supporting EN-DC. The UE may be configured to perform one or more measurement scans associated with cell selection and/or cell re-selection and may determine whether at least two LTE cells meet a selection criteria based on RSRP and/or SNR measurements. The UE may be configured to, in response to determining that at least two LTE cells meet the selection criteria, prioritize a first LTE cell of the at least two LTE cells over a second LTE cell of the at least two LTE cells based, at least in part, on support EN-DC. The first LTE cell may indicate support of EN-DC, e.g., via a ULI IE included in a SIB2 broadcast by the first LTE cell. The UE may be configured to select the first LTE cell for camping.

公开(公告)号：US10952147B2

公开(公告)日：2021-03-16

申请号：US16869380

申请日：2020-05-07

Applicant: Apple Inc.

Inventor： Tianyan Pu ,  Sai Sravan Bharadwaj Karri ,  Wei Zhang ,  Swaminathan Balakrishnan ,  Xiantao Sun ,  Beibei Wang ,  Manish G. Vemulapalli ,  Jia Tang ,  Sami M. Almalfouh ,  Zhu Ji ,  Sachin J. Sane

IPC: H04W52/02 ,  H04B7/0456 ,  H04B7/08 ,  H04W88/06

Abstract: This disclosure relates to techniques for opportunistically depowering receiver chains of a wireless device. Based on control information, a device may determine whether the current number of active receiver chains can be reduced while maintaining a target achievable code rate for a period of data reception associated with the control information. Additionally, the device may generate and use a lookup table to determine whether to depower receiver chains, and which receiver chains to depower.

公开(公告)号：US10716059B2

公开(公告)日：2020-07-14

申请号：US15202257

申请日：2016-07-05

Applicant: Apple Inc.

Inventor： Li Su ,  Ozgur Ekici ,  Sachin J. Sane ,  Madhusudan Chaudhary ,  Jianxiong Shi

IPC: H04W48/18 ,  H04J11/00 ,  H04L29/06 ,  H04B1/3827 ,  H04B17/318 ,  H04W84/02 ,  H04W84/04

Abstract: Techniques for a link budget limited UE to improve communications performance with cellular networks are disclosed. The UE may be associated with subscriptions to multiple carriers and may connect to a cell of a first carrier. The UE may detect that received signal strength from the cell is below a threshold and search for a new cell that may be of a different carrier. The UE may store a PLMN eSIM priority look up table and the search may be based on the look up table. Additionally, the UE may track received signal strength and geographic location in a first data structure that the UE may send to a server. The UE may receive a second data structure from the server that includes received signal strength at geographic locations compiled from a plurality of UEs, including the UE. The UE may also use the second data structure in searches for a new cell.

公开(公告)号：US10091669B2

公开(公告)日：2018-10-02

申请号：US15012573

申请日：2016-02-01

Applicant: Apple Inc.

Inventor： Umesh K. Shukla ,  Sachin J. Sane

IPC: H04W24/02 ,  H04W76/34 ,  H04W76/25 ,  H04W4/00 ,  H04L12/26 ,  H04L12/919 ,  H04L12/927 ,  H04W28/02 ,  H04W88/06 ,  H04W4/02 ,  H04L12/911

Abstract: Methods and apparatus for reducing voice call drop rate are disclosed. Existing devices do not account for the added burden of background services on voice calls. Specifically, multi-RAB scenarios (e.g., a voice call and background services) can experience significant reduction in call quality. Accordingly, in one exemplary embodiment, background services that are not time-critical and/or application-critical can be suspended while a voice call is in progress. By suspending background traffic during a call, the device can avoid unnecessary multi-RAB voice call operation, which significantly improves overall network operation and user experience.

公开(公告)号：US09961599B2

公开(公告)日：2018-05-01

申请号：US14875661

申请日：2015-10-05

Applicant: Apple Inc.

Inventor： Sachin J. Sane ,  Jianxiong Shi

IPC: G01R31/08 ,  H04L5/14 ,  H04B7/00 ,  H04L12/28 ,  H04J3/00 ,  H04W36/06 ,  H04L1/16 ,  H04L1/18 ,  H04W76/02 ,  H04W76/06 ,  H04L1/00

CPC classification number: H04W36/06 ,  H04L1/1685 ,  H04L1/1867 ,  H04L2001/0092 ,  H04W76/11 ,  H04W76/15 ,  H04W76/34

Abstract: A method to control multiple radio access bearers is performed at a mobile wireless communication device when the mobile wireless communication device is connected to a radio network subsystem in a wireless communication network by first and second bidirectional radio access bearers. The mobile wireless communication device transmits a data packet on an uplink of the first bidirectional radio access bearer to the radio network subsystem. When the data packet is not correctly received by the radio network subsystem, the mobile wireless communication device retransmits the data packet repeatedly. After N retransmissions of the data packet, the mobile wireless communication device releases the first bidirectional radio access bearer while maintaining the second bidirectional radio access bearer. The first bidirectional radio access bearer provides a channel to transport packet switched data, and the second bidirectional radio access bearer provides a channel to transport circuit switched data.

公开(公告)号：US09826455B2

公开(公告)日：2017-11-21

申请号：US14636051

申请日：2015-03-02

Applicant: Apple Inc.

Inventor： Sachin J. Sane ,  Sai Sravan Bharadwaj Karri

IPC: H04L1/00 ,  H04W36/30 ,  H04W36/12 ,  H04W36/14

CPC classification number: H04W36/30 ,  H04W36/12 ,  H04W36/14

Abstract: A method for network reselection by a wireless communication device is provided. The wireless communication device can have an established connection to a first network. The method can include measuring a signal strength and a signal-to-noise ratio of the first network. The method can further include determining that the signal strength satisfies a signal strength threshold. The method can additionally include comparing the signal-to-noise ratio to a signal-to-noise ratio threshold. The method can also include disconnecting from the first network and reselecting to a second network in an instance in which the signal-to-noise ratio does not satisfy the signal-to-noise ratio threshold even though the signal strength satisfies the signal strength threshold.

公开(公告)号：US09253664B2

公开(公告)日：2016-02-02

申请号：US14270223

申请日：2014-05-05

Applicant: Apple Inc.

Inventor： Umesh K. Shukla ,  Sachin J. Sane

IPC: H04W24/02 ,  H04W4/00 ,  H04W76/06 ,  H04L12/26 ,  H04L12/919 ,  H04L12/927 ,  H04W76/04 ,  H04W88/06 ,  H04W4/02 ,  H04L12/911

CPC classification number: H04W24/02 ,  H04L43/10 ,  H04L47/765 ,  H04L47/805 ,  H04L47/824 ,  H04W4/00 ,  H04W4/02 ,  H04W28/0215 ,  H04W28/0242 ,  H04W76/25 ,  H04W76/34 ,  H04W88/06

Abstract: Methods and apparatus for reducing voice call drop rate are disclosed. Existing devices do not account for the added burden of background services on voice calls. Specifically, multi-RAB scenarios (e.g., a voice call and background services) can experience significant reduction in call quality. Accordingly, in one exemplary embodiment, background services that are not time-critical and/or application-critical can be suspended while a voice call is in progress. By suspending background traffic during a call, the device can avoid unnecessary multi-RAB voice call operation, which significantly improves overall network operation and user experience.

Abstract translation: 公开了用于降低语音呼叫丢弃率的方法和装置。 现有设备不会影响后台服务对语音通话的负担。 具体地，多RAB方案（例如，语音呼叫和后台服务）可以显着降低呼叫质量。 因此，在一个示例性实施例中，在进行语音呼叫时可以暂停不是时间关键和/或应用关键的后台服务。 通过在呼叫期间挂起后台流量，设备可以避免不必要的多RAB语音呼叫操作，大大提高了整体网络运行和用户体验。

公开(公告)号：US09155009B2

公开(公告)日：2015-10-06

申请号：US13730631

申请日：2012-12-28

Applicant: Apple Inc.

Inventor： Sachin J. Sane ,  Jianxiong Shi

IPC: H04W72/00 ,  H04W36/06 ,  H04L1/16 ,  H04L1/18 ,  H04W76/02 ,  H04L1/00 ,  H04W76/06

CPC classification number: H04W36/06 ,  H04L1/1685 ,  H04L1/1867 ,  H04L2001/0092 ,  H04W76/11 ,  H04W76/15 ,  H04W76/34

Abstract: A method to control multiple radio access bearers is performed at a mobile wireless communication device when the mobile wireless communication device is connected to a radio network subsystem in a wireless communication network by first and second bidirectional radio access bearers. The mobile wireless communication device transmits a data packet on an uplink of the first bidirectional radio access bearer to the radio network subsystem. When the data packet is not correctly received by the radio network subsystem, the mobile wireless communication device retransmits the data packet repeatedly. After N retransmissions of the data packet, the mobile wireless communication device releases the first bidirectional radio access bearer while maintaining the second bidirectional radio access bearer. The first bidirectional radio access bearer provides a channel to transport packet switched data, and the second bidirectional radio access bearer provides a channel to transport circuit switched data.

Abstract translation: 当移动无线通信设备通过第一和第二双向无线电接入承载连接到无线通信网络中的无线电网络子系统时，在移动无线通信设备处执行用于控制多个无线电接入承载的方法。 移动无线通信设备将第一双向无线接入承载的上行链路上的数据分组发送到无线网络子系统。 当数据分组未被无线电网络子系统正确接收时，移动无线通信设备重复重传该数据分组。 在数据分组的N次重传之后，移动无线通信设备在保持第二双向无线接入承载的同时释放第一双向无线接入承载。 第一双向无线电接入承载提供传输分组交换数据的信道，第二双向无线电接入承载提供传输电路交换数据的信道。

公开(公告)号：US20150181497A1

公开(公告)日：2015-06-25

申请号：US14636051

申请日：2015-03-02

Applicant: Apple Inc.

Inventor： Sachin J. Sane ,  Sai Sravan Bharadwaj Karri

IPC: H04W36/30

CPC classification number: H04W36/30 ,  H04W36/12 ,  H04W36/14

Abstract: A method for network reselection by a wireless communication device is provided. The wireless communication device can have an established connection to a first network. The method can include measuring a signal strength and a signal-to-noise ratio of the first network. The method can further include determining that the signal strength satisfies a signal strength threshold. The method can additionally include comparing the signal-to-noise ratio to a signal-to-noise ratio threshold. The method can also include disconnecting from the first network and reselecting to a second network in an instance in which the signal-to-noise ratio does not satisfy the signal-to-noise ratio threshold even though the signal strength satisfies the signal strength threshold.

Abstract translation: 提供了一种由无线通信设备进行网络重选的方法。 无线通信设备可以具有到第一网络的建立的连接。 该方法可以包括测量第一网络的信号强度和信噪比。 该方法还可以包括确定信号强度满足信号强度阈值。 该方法还可以包括将信噪比与信噪比阈值进行比较。 在信号噪声比不满足信噪比阈值的情况下，即使信号强度满足信号强度阈值，该方法还可以包括从第一网络断开并重新选择到第二网络。