Enhanced LTE retainability when roaming

    公开(公告)号:US10517105B1

    公开(公告)日:2019-12-24

    申请号:US16135584

    申请日:2018-09-19

    Applicant: APPLE INC.

    Abstract: A device is configured to establish a first roaming network connection to a first roaming network and a second roaming network connection to a second roaming network. The first roaming network has a higher priority than the second roaming network, the second roaming network configured to support a first radio access technology (RAT) and a second RAT, the first RAT having a higher priority than the second RAT. When a current network connection is the second roaming network connection, determining a current RAT used for the second roaming network connection. When the current RAT is the first RAT, determining between an active use state and a non-active use state. When the device is in the active use state, deactivating a capability to reselect to the first roaming network.

    Mobile Terminating Short Message Service Re-Transmission Management

    公开(公告)号:US20190357019A1

    公开(公告)日:2019-11-21

    申请号:US16403699

    申请日:2019-05-06

    Applicant: Apple Inc.

    Abstract: This disclosure relates to techniques for managing mobile-terminating short message service re-transmissions for wireless devices. A cellular network entity of a cellular network may receive a request to provide a short message service message to a wireless device. The wireless device may be registered with the cellular network entity via at least two access types. An attempt to provide the short message service message to the wireless device via a first access type may be performed. An attempt to provide the short message service message to the wireless device via a second access type may be performed if the attempt to provide the short message service message to the wireless device via the first access type is unsuccessful.

    Cellular System Selection Frequency Scan Scope

    公开(公告)号:US20190230561A1

    公开(公告)日:2019-07-25

    申请号:US16372263

    申请日:2019-04-01

    Applicant: Apple Inc.

    Abstract: Apparatuses, systems, and methods for user equipment (UE) devices to perform more efficient frequency scans for potential base stations. According to techniques described herein, the UE may determine that it does not have cellular service and determine first information based on a last camped cell. A time period during which the first information was acquired may be determined and one or more frequency scans may be performed. The frequency scans may be limited to a set of frequencies based in part on the time period. Thus, if the time period is less than a first value, the set of frequencies may include a first set of frequencies and if the time period is greater than the first value but less than a second value, the set of frequencies may include the first set of frequencies and a second set of frequencies.

    Cellular system selection frequency scan scope for roaming

    公开(公告)号:US10045287B1

    公开(公告)日:2018-08-07

    申请号:US15592327

    申请日:2017-05-11

    Applicant: Apple Inc.

    Abstract: Apparatuses, systems, and methods for user equipment (UE) devices to perform more efficient frequency scans for potential base stations. According to techniques described herein, the UE may, in response to detecting that UE does not have cellular service, perform a full band scan to search for a last registered public land mobile network (PLMN) and the full band scan may discover one or more cells not associated with the last registered PLMN. The UE may populate a database with one or more parameters associated with the one or more cells and in response to not finding the last registered PLMN, perform a targeted scan limited to a set of PLMNs found during the full band scan. In some embodiments, each PLMN in the set of PLMNs may be comprised in a roaming PLMN list for an operator.

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