Cellular system selection frequency scan scope

    公开(公告)号:US10251095B2

    公开(公告)日:2019-04-02

    申请号:US15590127

    申请日:2017-05-09

    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.

    Mobile Device with Improved Network Selection while Roaming
    56.
    发明申请
    Mobile Device with Improved Network Selection while Roaming 有权
    移动设备在漫游时具有改进的网络选择

    公开(公告)号:US20160330606A1

    公开(公告)日:2016-11-10

    申请号:US14732765

    申请日:2015-06-07

    Applicant: Apple Inc.

    CPC classification number: H04W8/065 H04W48/16 H04W60/005 H04W60/02 H04W88/06

    Abstract: Apparatuses, systems, and methods for user equipment (UE) devices to perform a radio access technology (RAT) upgrade. A UE may initiate a background scan to upgrade RAT while camped on a first system in response to an occurrence of a first condition. The first system may include a first PLMN that operates according a first RAT. The UE may determine a second system operates according to a second RAT that provides upgraded service as compared to the first RAT. The second system may be included in one or more systems found during the background scan. The UE may attempt to register on the second system based on the second PLMN operating according to the second RAT. The first and second PLMNs may each have an associated operator preference and the first PLMN may be preferred over the second PLMN.

    Abstract translation: 用于用户设备(UE)设备执行无线电接入技术(RAT)升级的设备,系统和方法。 响应于第一状况的发生,UE可以启动后台扫描以升级RAT,同时驻留在第一系统上。 第一系统可以包括根据第一RAT操作的第一PLMN。 UE可以根据与第一RAT相比提供升级服务的第二RAT来确定第二系统操作。 第二系统可以被包括在在后台扫描期间发现的一个或多个系统中。 UE可以基于根据第二RAT操作的第二PLMN来尝试在第二系统上注册。 第一和第二PLMN可以各自具有相关联的运营商偏好,并且第一PLMN可以优于第二PLMN。

    ENHANCING JITTER BUFFER PERFORMANCE THROUGH RADIO LEVEL FEEDBACK
    58.
    发明申请
    ENHANCING JITTER BUFFER PERFORMANCE THROUGH RADIO LEVEL FEEDBACK 审中-公开
    通过无线电级提高反馈来提高抖动性能

    公开(公告)号:US20150351060A1

    公开(公告)日:2015-12-03

    申请号:US14821144

    申请日:2015-08-07

    Applicant: Apple Inc.

    Abstract: A jitter buffer in a Voice over LTE receiver may be influenced by radio level feedback (RLF) from both local and remote endpoints to preemptively adjust the jitter buffer delay in anticipation of predicted future losses that have a high probability of occurring. The radio events of the RLF and the scenarios that trigger the preemptive adjustments may be identified, and their use may be expressed in terms of mathematical formulas. Previously, the instantaneous jitter was derived from a weighted history of the media stream, and consequently only packets that had already been received were used to compute the instantaneous jitter to adjust the length of the buffer. By providing and using RLF from both local and remote endpoints, the anticipated delay—for packets that have not yet arrived—may be used to preemptively adjust the buffer, thereby minimizing packet loss without introducing unnecessary delay.

    Abstract translation: 在LTE语音接收机中的抖动缓冲器可能受来自本地和远端端点的无线电电平反馈(RLF)的影响,以预先考虑具有高概率发生的预测未来损耗的抖动缓冲器延迟。 可以识别RLF的无线电事件和触发抢先调整的场景,并且可以用数学公式来表示它们的使用。 以前,瞬时抖动是从媒体流的加权历史得出的,因此只有已经接收到的数据包被用于计算瞬时抖动以调整缓冲器的长度。 通过从本地端点和远端端点提供和使用RLF,对于尚未到达的数据包,预期的延迟可能被用于抢先调整缓冲区,从而最大限度地减少数据包丢失而不引入不必要的延迟。

    METHOD FOR SIMULTANEOUSLY RECEIVING LTE AND 1X IN SRLTE DEVICE
    59.
    发明申请
    METHOD FOR SIMULTANEOUSLY RECEIVING LTE AND 1X IN SRLTE DEVICE 有权
    同时接收LTE和1X在SRLTE设备中的方法

    公开(公告)号:US20140086209A1

    公开(公告)日:2014-03-27

    申请号:US14037269

    申请日:2013-09-25

    Applicant: Apple Inc.

    Abstract: Methods, apparatuses and computer readable media are described that configure wireless circuitry of a wireless communication device. The wireless communication device establishes a connection to a first wireless network using first and second receiving signaling chains. In response to detecting a radio frequency tune-away event, the wireless communication device reconfigures only one of the radio frequency signaling chains to receive signals from a second wireless network when a set of receive signal conditions for the second wireless network is satisfied. The wireless communication device reconfigures both of the radio frequency signaling chains to the second wireless network when the set of receive signal conditions is not satisfied.

    Abstract translation: 描述了配置无线通信设备的无线电路的方法,设备和计算机可读介质。 无线通信设备使用第一和第二接收信令链建立到第一无线网络的连接。 响应于检测到无线电频率调谐事件,当满足第二无线网络的一组接收信号条件时,无线通信设备仅重新配置射频信号链中的一个以从第二无线网络接收信号。 当不满足接收信号条件的集合时,无线通信设备将两个无线电频率信令链重新配置到第二无线网络。

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