Power-efficient synchronization for long-range device-to-device communications

    公开(公告)号:US11917517B2

    公开(公告)日:2024-02-27

    申请号:US17379458

    申请日:2021-07-19

    Applicant: Apple Inc.

    Abstract: A communications network may include user equipment (UE) devices. When a first UE device becomes off-grid and has an emergency message, the first UE device may transmit device-to-device signals for receipt by a second UE device. The signals may include one or more preambles that precede the emergency message and that are used by the second UE device to perform synchronization with the first UE device. The second UE device may periodically activate a receiver during a series of windows to listen for the signals, may receive a preamble sequence during one of the windows, and may synchronize its timing to the first UE device for receipt of the emergency message based on the preamble sequence. This may allow the UE devices to be synchronized for transfer of the emergency message over long distances while consuming a minimal amount of power on the second UE device.

    Electronic Devices with Adaptive Device-to-Device Communication Switching

    公开(公告)号:US20230091862A1

    公开(公告)日:2023-03-23

    申请号:US17481214

    申请日:2021-09-21

    Applicant: Apple Inc.

    Abstract: A communications network may include a relay device that receives device-to-device (D2D) signals. In an ad hoc mode, the relay may consume relatively little power while receiving relatively few messages from relatively few transmitting devices in the D2D signals. In an organized mode, the device may consume relatively high power while receiving many messages from many transmitting devices in the D2D signals. A receiver on the device may transition from the ad hoc mode to the organized mode in response to a first criterion and may transition from the organized mode to the ad hoc mode in response to a second switching criterion. This may allow the device to balance communications load and power consumption while relaying messages such as emergency messages received over D2D signals given that the signals may arrive rarely or in clusters due to an unforeseen event.

    IoT GOES UNLICENSED
    4.
    发明申请

    公开(公告)号:US20210144560A1

    公开(公告)日:2021-05-13

    申请号:US16489475

    申请日:2017-03-28

    Applicant: Apple Inc.

    Abstract: Machines or networked devices such as internet of things (IoT) devices operate to generate an unlicensed narrowband (U-NB) IoT communication based on time domain multiple carrier aggregation operations with component carriers. These component carriers can comprise a component carrier that is anchored to a long term evolution (LTE) licensed band, or entirely comprise unlicensed carrier components that are unanchored to the LTE component carrier in a standalone configuration. Communication circuitry such as a radio frequency interface can transmit the U-NB IoT communication in standalone communications over a low power IoT network in an unlicensed band.

    Communication device and method for receiving signals in a frequency range

    公开(公告)号:US11006435B2

    公开(公告)日:2021-05-11

    申请号:US16512461

    申请日:2019-07-16

    Applicant: Apple Inc.

    Abstract: A communication terminal is described comprising a first transceiver configured for communication according to a first radio access technology and a second transceiver configured for communication according to a second radio access technology. The second transceiver is configured to determine whether a frequency range is occupied by a transmission according to the second radio access technology and to notify the first transceiver whether the frequency range is occupied by a transmission according to the second radio access technology. The first transceiver is configured to receive signals transmitted in the frequency range based on the notification from the second transceiver.

    IoT goes unlicensed
    9.
    发明授权

    公开(公告)号:US11172371B2

    公开(公告)日:2021-11-09

    申请号:US16489475

    申请日:2017-03-28

    Applicant: Apple Inc.

    Abstract: Machines or networked devices such as internet of things (IoT) devices operate to generate an unlicensed narrowband (U-NB) IoT communication based on time domain multiple carrier aggregation operations with component carriers. These component carriers can comprise a component carrier that is anchored to a long term evolution (LTE) licensed band, or entirely comprise unlicensed carrier components that are unanchored to the LTE component carrier in a standalone configuration. Communication circuitry such as a radio frequency interface can transmit the U-NB IoT communication in standalone communications over a low power IoT network in an unlicensed band.

    Evolved node-b, local controller and method for allocation of spectrum for secondary usage

    公开(公告)号:US10939300B2

    公开(公告)日:2021-03-02

    申请号:US15760570

    申请日:2015-09-22

    Applicant: Apple Inc.

    Abstract: Embodiments of an Evolved Node-B (eNB), Local Controller (LC) device, and methods for allocation of shared spectrum for secondary usage are generally described herein. In some cases, primary usage of the shared spectrum may be prioritized over the secondary usage of the shared spectrum. The eNB may receive, from the LC device, a spectrum availability message that indicates an availability of the shared spectrum for the secondary usage. The eNB may transmit, to the LC device, spectrum sensing information that is based at least partly on one or more signal strength measurements for UEs connected to the eNB. The eNB may further transmit, to the LC device, a spectrum engagement message that indicates an intention of the eNB to use at least a portion of the shared spectrum for communication with the UEs.

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