Cellular Burst Detection in Unlicensed Spectrum

    公开(公告)号:US20200267699A1

    公开(公告)日:2020-08-20

    申请号:US16789356

    申请日:2020-02-12

    Applicant: Apple Inc.

    Abstract: This disclosure relates to performing detection of burst cellular communication in unlicensed spectrum. A wireless device may establish a cellular link with a cellular base station, which may provide a first cell deployed on an unlicensed frequency channel. The wireless device may receive a transmission from a second cell. The second cell may not be a serving cell of the wireless device. The transmission may be received on at least a portion of the unlicensed frequency channel. The wireless device may decode a channel occupancy time field of the transmission from the second cell. The wireless device may determine a channel occupancy time of the transmission from the second cell based at least in part on the channel occupancy time field.

    Synchronization sequence design for device-to-device communication

    公开(公告)号:US10666489B2

    公开(公告)日:2020-05-26

    申请号:US16110377

    申请日:2018-08-23

    Applicant: Apple Inc.

    Abstract: This disclosure relates to techniques for supporting narrowband device-to-device wireless communication, including possible techniques for providing synchronization sequences. A first wireless device may transmit a preamble of a device-to-device wireless communication with a second wireless device. The preamble may include a first synchronization sequence. The first synchronization sequence may include multiple repetitions of a basis sequence, multiplied by a cover code. The basis sequence may span multiple orthogonal frequency division multiplexing symbols.

    Synchronization Sequence Design for Device-to-Device Communication

    公开(公告)号:US20190089570A1

    公开(公告)日:2019-03-21

    申请号:US16110377

    申请日:2018-08-23

    Applicant: Apple Inc.

    CPC classification number: H04L27/2692 H04L27/2613 H04W56/001 H04W56/002

    Abstract: This disclosure relates to techniques for supporting narrowband device-to-device wireless communication, including possible techniques for providing synchronization sequences. A first wireless device may transmit a preamble of a device-to-device wireless communication with a second wireless device. The preamble may include a first synchronization sequence. The first synchronization sequence may include multiple repetitions of a basis sequence, multiplied by a cover code. The basis sequence may span multiple orthogonal frequency division multiplexing symbols.

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