Radio Access Technology Selection in Multimode Internet of Things Devices

    公开(公告)号:US20210092677A1

    公开(公告)日:2021-03-25

    申请号:US16580321

    申请日:2019-09-24

    Abstract: Methods for conserving power in a multi-mode wireless device capable of communicating via a first radio access technology (RAT) and second RAT in which communication using the first RAT is preferred are disclosed. Various embodiments may include methods to determine whether a condition warrants attempting a connection with the first RAT in response to the multi-mode wireless device communicating using the second RAT, in response to determining that no condition warrants attempting a wireless connection using the first RAT, continue to communicate using the second RAT for a first duration before again determining whether a condition warrants attempting a connection with the first RAT, and determine whether a connection can be made to the first preferred RAT in response to determining that a condition warrants attempting a wireless connection using the first RAT.

    BAND SCAN FOR NARROWBAND COMMUNICATIONS
    6.
    发明申请

    公开(公告)号:US20200236173A1

    公开(公告)日:2020-07-23

    申请号:US16255435

    申请日:2019-01-23

    Abstract: A user equipment (UE) performs wireless communication by starting a scan of an absolute radio frequency channel number (ARFCN) configured for performing a narrowband communication. The UE determines, based on a spectral characteristic of a phase of a signal in the ARFCN, whether a cellular communication is deployed in the ARFCN. The UE may then terminate the scan of the ARFCN in response to the spectral characteristic of the phase of the signal in the ARFCN indicating that the cellular communication is deployed in the ARFCN. Alternatively, the UE may proceed with a synchronization signal search on the ARFCN in response to the spectral characteristic of the phase of the signal in the ARFCN indicating that the cellular communication is not deployed in the ARFCN.

    FAST WAKEUP SIGNAL DETECTOR
    10.
    发明申请

    公开(公告)号:US20210360526A1

    公开(公告)日:2021-11-18

    申请号:US16938609

    申请日:2020-07-24

    Abstract: Aspects of the disclosure relate to a user equipment (UE) for wireless communication. The UE wakes to monitor for a wakeup signal (WUS) having a maximum WUS duration and configured to indicate an upcoming transmission of a paging signal corresponding to the WUS. The UE detects a reference signal tone energy from tones carrying reference signals, detects a WUS tone energy from tones designated for carrying the WUS, and determines whether the WUS is present or absent based on the WUS tone energy and the reference signal tone energy. The UE then transitions to a sleep state prior to an end of the maximum WUS duration when the WUS is determined to be absent. Alternatively, the UE remains awake when the WUS is determined to be present and receives the paging signal corresponding to the WUS. Other aspects, features, and embodiments are also claimed and described.

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