Circuit-switched fallback with improved reliability in pool overlap areas

    公开(公告)号:US09769712B2

    公开(公告)日:2017-09-19

    申请号:US14790041

    申请日:2015-07-02

    Applicant: Apple Inc.

    CPC classification number: H04W36/0022 H04W36/14

    Abstract: Performing a circuit-switched fallback (CSFB) call with improved reliability. A request to establish a CSFB call may be received by a UE that is currently in a pool overlap area. The network resource controller, or the base station, transmits information to the UE which indicates the pools in which neighboring cells are operating. The UE uses this information to select a circuit-switched cell on which to operate for the CSFB operation, wherein the selected CS cell is in the same pool area as the current pool area. This prevents the UE from inadvertently camping on a CS cell in a different pool area, which could cause call failure on some networks. The information provided by the base station may comprise a pool area id, or may comprise mapping relation information that is useable by the UE to determine the current pool area.

    Link Quality Based Single Radio-Voice Call Continuity and Packet Scheduling for Voice over Long Term Evolution Communications
    5.
    发明申请
    Link Quality Based Single Radio-Voice Call Continuity and Packet Scheduling for Voice over Long Term Evolution Communications 审中-公开
    基于链路质量的单无线电语音呼叫连续性和长期演进通信语音的分组调度

    公开(公告)号:US20160353316A1

    公开(公告)日:2016-12-01

    申请号:US15096138

    申请日:2016-04-11

    Applicant: Apple Inc.

    Abstract: Wireless devices, networks and methods may operate to have a wireless device cause a base station to trigger voice call continuity handovers responsive to the quality of the cellular radio link in addition to the base station triggering such handovers based on location or mobility. Furthermore, wireless communication devices may also perform monitoring of multiple buffers operating within the wireless communication device and associated with different respective communication layers, in addition to monitoring the quality of the cellular radio link, to perform intelligent dropping/discarding and/or scheduling of packets at the wireless communications device. Any one or more of these features may improve the ability of the wireless communications device to achieve stated Voice over Long Term Evolution (VoLTE) performance benchmarks in the context of the realities of current VoLTE networks.

    Abstract translation: 除了基站基于位置或移动性触发这种切换之外,无线设备,网络和方法可以操作以使无线设备响应于蜂窝无线电链路的质量而使基站触发语音呼叫连续性切换。 此外,除了监视蜂窝无线电链路的质量之外,无线通信设备还可以对在无线通信设备内操作并且与不同的相应通信层相关联的多个缓冲器执行监视,以执行智能丢弃/丢弃和/或调度分组 在无线通信设备。 这些特征中的任何一个或多个可以提高无线通信设备在当前VoLTE网络的实际情况下实现所述语音长期演进(VoLTE)性能基准的能力。

    SYSTEMS, METHODS, AND DEVICES FOR OPTOMIZED RETURN TO HPLMN

    公开(公告)号:US20230408626A1

    公开(公告)日:2023-12-21

    申请号:US17844269

    申请日:2022-06-20

    Applicant: Apple Inc.

    CPC classification number: G01S5/0054 H04W64/00 H04W8/02 H04W84/042

    Abstract: The techniques described herein include superior home-on-home roaming procedures by enabling user equipment (UE) to modify a home public land mobile network (HPLMN) search periodicity based on a likelihood of detecting an HPLMN cell (e.g., base station). A UE may be configured to determine a current geographic location of the UE, access a database that includes information about the HPLMN for the location (e.g., prior HPLMN searches), determine an appropriate HPLMN search periodicity based on the information, and perform HPLMN searches based on the appropriate HPLMN search periodicity. In some implementations, the UE may determine the HPLMN search periodicity based on a number (N) of HPLMN cells, and/or times an HPLMN cell sample, associated with the geographic area, has been detected previously.

    Systems, methods, and devices for optimized return to HPLMN

    公开(公告)号:US12292523B2

    公开(公告)日:2025-05-06

    申请号:US17844269

    申请日:2022-06-20

    Applicant: Apple Inc.

    Abstract: The techniques described herein include superior home-on-home roaming procedures by enabling user equipment (UE) to modify a home public land mobile network (HPLMN) search periodicity based on a likelihood of detecting an HPLMN cell (e.g., base station). A UE may be configured to determine a current geographic location of the UE, access a database that includes information about the HPLMN for the location (e.g., prior HPLMN searches), determine an appropriate HPLMN search periodicity based on the information, and perform HPLMN searches based on the appropriate HPLMN search periodicity. In some implementations, the UE may determine the HPLMN search periodicity based on a number (N) of HPLMN cells, and/or times an HPLMN cell sample, associated with the geographic area, has been detected previously.

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