Systems and methods for managing circuit switched fallback calls

    公开(公告)号:US10165472B2

    公开(公告)日:2018-12-25

    申请号:US14686506

    申请日:2015-04-14

    Abstract: Techniques described herein may enable a wireless cellular network to transfer a call from a packet-switched (PS) portion of the wireless cellular network to a circuit-switched (CS) portion of the wireless cellular network, in a manner that ensures that the CS network receiving the call can actually support the call. For instance, before the wireless cellular network selects RAT for the CS network for transferring a call, the wireless cellular network may identify a call type for the call (e.g., simple voice call, video call, etc.), identify a RAT for the CS network that can support the call type, and proceed to transfer the call to the CS portion of the wireless cellular network that can support the call type, thus ensuring that the call is not dropped as a result of the transfer.

    ENHANCED INTERNET PROTOCOL MULTIMEDIA SUBSYSTEM CALL HANDLING

    公开(公告)号:US20230119871A1

    公开(公告)日:2023-04-20

    申请号:US18084262

    申请日:2022-12-19

    Abstract: Systems and methods of enabling access for non-emergency voice calls are described. A UE operates in a network supporting voice services via a multitude of RATs. The UE attempts to access the network via a first RAT offering voice services and data services. If the UE does not receive a response from the network within a first time period, the UE re-attempts the access to the network via the first RAT. If the number of access attempts for which the UE does not receive a response is at least a threshold value, the UE refrains during a second time period from further access attempts via the first RAT for the purpose of receiving data services, and continues to attempt access via the first or second RAT for the purpose of receiving voice services.

    Enhanced internet protocol multimedia subsystem call handling

    公开(公告)号:US11576086B2

    公开(公告)日:2023-02-07

    申请号:US16645278

    申请日:2018-11-02

    Abstract: Systems and methods of enabling access for non-emergency voice calls are described. A UE operates in a network supporting voice services via a multitude of RATs. The UE attempts to access the network via a first RAT offering voice services and data services. If the UE does not receive a response from the network within a first time period, the UE re-attempts the access to the network via the first RAT. If the number of access attempts for which the UE does not receive a response is at least a threshold value, the UE refrains during a second time period from further access attempts via the first RAT for the purpose of receiving data services, and continues to attempt access via the first or second RAT for the purpose of receiving voice services.

    Circuit switched fall back improvements

    公开(公告)号:US09749905B2

    公开(公告)日:2017-08-29

    申请号:US14472569

    申请日:2014-08-29

    CPC classification number: H04W36/0022

    Abstract: An improved circuit switched fallback (CSFB) method is disclosed, in which failures following several abnormal cases not anticipated by the 3rd Generation Partnership Project (3GPP) specification are avoided. User equipment implementing the improved CSFB method demonstrate increased performance in terms of call success rate and hence provide an improved user experience and an edge over Long Term Evolution (LTE) modem competitors. The improved CSFB method can be included in the 3GPP standards for such abnormal case handling and CSFB call recovery.

    SYSTEMS AND METHODS FOR MANAGING CIRCUIT SWITCHED FALLBACK CALLS
    9.
    发明申请
    SYSTEMS AND METHODS FOR MANAGING CIRCUIT SWITCHED FALLBACK CALLS 审中-公开
    用于管理电路切换的倒车呼叫的系统和方法

    公开(公告)号:US20160100336A1

    公开(公告)日:2016-04-07

    申请号:US14686506

    申请日:2015-04-14

    CPC classification number: H04W36/0022 H04W48/18 H04W76/10 H04W76/16

    Abstract: Techniques described herein may enable a wireless cellular network to transfer a call from a packet-switched (PS) portion of the wireless cellular network to a circuit-switched (CS) portion of the wireless cellular network, in a manner that ensures that the CS network receiving the call can actually support the call. For instance, before the wireless cellular network selects RAT for the CS network for transferring a call, the wireless cellular network may identify a call type for the call (e.g., simple voice call, video call, etc.), identify a RAT for the CS network that can support the call type, and proceed to transfer the call to the CS portion of the wireless cellular network that can support the call type, thus ensuring that the call is not dropped as a result of the transfer.

    Abstract translation: 本文描述的技术可以使得无线蜂窝网络能够以无线蜂窝网络的分组交换(PS)部分将呼叫从无线蜂窝网络的分组交换(PS)部分传送到无线蜂窝网络的电路交换(CS)部分,以确保CS 接收呼叫的网络实际上可以支持该呼叫。 例如,在无线蜂窝网络选择用于CS网络的RAT用于传送呼叫之前,无线蜂窝网络可以识别用于呼叫的呼叫类型(例如,简单语音呼叫,视频呼叫等),识别用于 CS网络,可以支持呼叫类型,并且继续将呼叫转移到可以支持呼叫类型的无线蜂窝网络的CS部分,从而确保呼叫由于传送而不被丢弃。

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