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    Session management in wireless communication system
    1.
    发明授权
    Session management in wireless communication system 有权

    公开(公告)号：US11445401B2

    公开(公告)日：2022-09-13

    申请号：US16795421

    申请日：2020-02-19

    Applicant: MEDIATEK INC.

    Inventor： Chien-Chun Huang-Fu ,  Yu-Chieh Tien ,  Chi-Hsien Chen ,  Shang-Ru Mo

    IPC: H04W28/12 ,  H04W28/02 ,  H04W80/10 ,  H04W76/25

    Abstract: A method can include receiving a non-access stratum (NAS) message for establishing or modifying a protocol data unit (PDU) session at a user equipment (UE) from a core network, determining whether there is a quality of service (QoS) flow description resulting from the establishment or modification of the PDU session that is associated with a guaranteed bit rate (GBR) QoS flow of the PDU session, and invalid, and when it is determined that there is the invalid QoS flow description associated with the GBR QoS flow of the PDU session, performing an error handling operation.

    INTERWORKING BETWEEN EVOLVED PACKET SYSTEM (EPS) SESSION MANAGEMENT (ESM) AND 5G SESSION MANAGEMENT (5GSM)
    2.
    发明申请
    INTERWORKING BETWEEN EVOLVED PACKET SYSTEM (EPS) SESSION MANAGEMENT (ESM) AND 5G SESSION MANAGEMENT (5GSM) 审中-公开

    公开(公告)号：US20200322834A1

    公开(公告)日：2020-10-08

    申请号：US16828090

    申请日：2020-03-24

    Applicant: MEDIATEK INC.

    Inventor： Chien-Chun HUANG-FU ,  Shang-Ru Mo

    IPC: H04W28/02 ,  H04W76/10

    Abstract: A method can include receiving a “create new evolved packet system (EPS) bearer” operation code in a mapped EPS bearer contexts information element (TB) in a first protocol data unit (PDU) session modification command message for creating a mapped EPS bearer context at a user equipment (UE) in a wireless communication system, and when there is neither a quality of service (QoS) flow descriptions IE in the first PDU session modification command message indicating a QoS flow description corresponding to an EPS bearer identity (EBI) in the mapped EPS bearer context, nor an existing QoS flow description at the UE corresponding to the EBI included in the mapped EPS bearer context, sending a PDU session modification request message including a mapped EPS bearer contexts IE to delete the mapped EPS bearer context.

    Method of enhanced bearer continuity for 3GPP system change
    3.
    发明授权
    Method of enhanced bearer continuity for 3GPP system change 有权

    公开(公告)号：US09888421B2

    公开(公告)日：2018-02-06

    申请号：US14854369

    申请日：2015-09-15

    Applicant: MEDIATEK INC.

    Inventor： Shang-Ru Mo ,  Chien-Chun Huang-Fu ,  Yuan-Chieh Lin ,  Yung Hsiang Hsieh ,  Yung-Fu Chen

    IPC: H04W36/00 ,  H04W36/24 ,  H04W36/14 ,  H04W76/04 ,  H04W48/20

    CPC classification number: H04W36/24 ,  H04W36/14 ,  H04W48/20 ,  H04W76/22

    Abstract: Methods and apparatus are provided for enhanced bearer continuity for the 3GPP network. In one novel aspect, the UE detects missing parameters for the inter-RAT bearer change in an idle state. The UE performs bearer preservation procedures to maintain the bearer continuity. In one embodiment, predefined/preconfigured parameter settings are used. In one embodiment, a mapping rule is used to map the missing parameter to a predefined value based on one or more known parameters. In another embodiment, the missing parameters are obtained from the network. In another embodiment, signaling procedures used to obtain the missing parameters. The signaling procedures include a service request, a UE-initiated bearer modification procedure. In one embodiment, the cell reselection is suspended such that the signaling procedure is performed to obtain the missing parameters before the cell reselection. In another embodiment, a RAU procedure is used upon detecting the missing of parameters.

    Insufficient Resources in the UE during PDU Session Establishment Procedure
    5.
    发明申请
    Insufficient Resources in the UE during PDU Session Establishment Procedure 审中-公开

    公开(公告)号：US20200162958A1

    公开(公告)日：2020-05-21

    申请号：US16686868

    申请日：2019-11-18

    Applicant: MEDIATEK INC.

    Inventor： Chien-Chun Huang-Fu ,  Chi-Hsien Chen ,  Shang-Ru Mo

    IPC: H04W28/02 ,  H04W76/10 ,  H04W76/30 ,  H04W80/10 ,  H04W56/00 ,  H04W88/02

    Abstract: A method of handling insufficient resources in a user equipment (UE) during a PDU session establishment procedure is proposed. During a PDU session establishment procedure, UE sends a PDU SESSION ESTABLISHMENT REQUEST message to the network. UE then receives a PDU SESSION ESTABLISHMENT ACCEPT message from the network, the ACCEPT message carries various PDU session parameters including authorized QoS rules and QoS flows. If UE decides to reject the addition of the new authorized QoS flow description or the new authorized QoS rule due to lack of resources, UE may initiate a PDU session release procedure with 5G session management (5GSM) cause IE #26 “insufficient resources”. In an alternative embodiment, UE may synchronize with the network by sending a PDU session modification request message to delete certain QoS rules/flow descriptions with 5GSM cause IE #26 “insufficient resources”.

    Method of inter-RAT bearer change for 3GPP system
    7.
    发明授权
    Method of inter-RAT bearer change for 3GPP system 有权

    公开(公告)号：US10257760B2

    公开(公告)日：2019-04-09

    申请号：US14854413

    申请日：2015-09-15

    Applicant: MEDIATEK INC.

    Inventor： Chien-Chun Huang-Fu ,  Shang-Ru Mo ,  Yuan-Chieh Lin ,  Yung Hsiang Hsieh ,  Yung-Fu Chen

    IPC: H04W36/24 ,  H04W76/22 ,  H04W36/14 ,  H04W48/20

    Abstract: Methods and apparatus are provided for inter-RAT bearer change for the 3GPP network. In one novel aspect, a bearer termination procedure is performed upon detecting one or more triggering events for the inter-RAT bearer modification. In one embodiment, the UE established the 4G EPS bearer. The UE successfully performs a bearer change from 4G to 3G. Subsequently, the UE detects missing mandatory parameters during inter-RAT bearer change from 3G to 2G in an idle state. The UE performs bearer termination by releasing the PDP context. In one embodiment, the PDP context is locally released. In other embodiments, the UE explicitly releases bearer using the PDP context deactivation procedure. The locally released procedure can be triggered by the UE, or by the network, or by both the UE and the network. The explicitly PDP context release procedure can be triggered by the UE, or by the network, or by both the UE and the network.

    Method of Inter-RAT Bearer Change for 3GPP System
    8.
    发明申请
    Method of Inter-RAT Bearer Change for 3GPP System 审中-公开
    3GPP系统的RAT间承载变化方法

    公开(公告)号：US20160080992A1

    公开(公告)日：2016-03-17

    申请号：US14854413

    申请日：2015-09-15

    Applicant: MEDIATEK INC.

    Inventor： Chien-Chun Huang-Fu ,  Shang-Ru Mo ,  Yuan-Chieh Lin ,  Yung Hsiang Hsieh ,  Yung-Fu Chen

    IPC: H04W36/00 ,  H04W36/24 ,  H04W36/14

    CPC classification number: H04W36/24 ,  H04W36/14 ,  H04W48/20 ,  H04W76/22

    Abstract: Methods and apparatus are provided for inter-RAT bearer change for the 3GPP network. In one novel aspect, a bearer termination procedure is performed upon detecting one or more triggering events for the inter-RAT bearer modification. In one embodiment, the UE established the 4G EPS bearer. The UE successfully performs a bearer change from 4G to 3G. Subsequently, the UE detects missing mandatory parameters during inter-RAT bearer change from 3G to 2G in an idle state. The UE performs bearer termination by releasing the PDP context. In one embodiment, the PDP context is locally released. In other embodiments, the UE explicitly releases bearer using the PDP context deactivation procedure. The locally released procedure can be triggered by the UE, or by the network, or by both the UE and the network. The explicitly PDP context release procedure can be triggered by the UE, or by the network, or by both the UE and the network.

    Abstract translation: 提供了用于3GPP网络的RAT间承载变化的方法和装置。 在一个新颖的方面，在检测用于RAT间承载修改的一个或多个触发事件时，执行承载终止过程。 在一个实施例中，UE建立了4G EPS承载。 UE成功地执行从4G到3G的承载变化。 随后，UE在空闲状态期间从3G到2G的RAT间承载变化期间检测到缺失的强制参数。 UE通过释放PDP上下文来执行承载终止。 在一个实施例中，PDP上下文被本地释放。 在其他实施例中，UE使用PDP上下文去激活过程明确地释放承载。 本地发布的过程可以由UE触发，也可以由网络触发，或由UE和网络触发。 明确的PDP上下文释放过程可以由UE或网络或UE和网络两者触发。

    Interworking between evolved packet system (EPS) session management (ESM) and 5G session management (5GSM)
    9.
    发明授权
    Interworking between evolved packet system (EPS) session management (ESM) and 5G session management (5GSM) 有权

    公开(公告)号：US11246054B2

    公开(公告)日：2022-02-08

    申请号：US16828090

    申请日：2020-03-24

    Applicant: MEDIATEK INC.

    Inventor： Chien-Chun Huang-Fu ,  Shang-Ru Mo

    IPC: H04W28/02 ,  H04W76/10

    Abstract: A method can include receiving a “create new evolved packet system (EPS) bearer” operation code in a mapped EPS bearer contexts information element (IE) in a first protocol data unit (PDU) session modification command message for creating a mapped EPS bearer context at a user equipment (UE) in a wireless communication system, and when there is neither a quality of service (QoS) flow descriptions IE in the first PDU session modification command message indicating a QoS flow description corresponding to an EPS bearer identity (EBI) in the mapped EPS bearer context, nor an existing QoS flow description at the UE corresponding to the EBI included in the mapped EPS bearer context, sending a PDU session modification request message including a mapped EPS bearer contexts IE to delete the mapped EPS bearer context.

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