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US 2017/0318613 A1Published application
Base station device, position management device, terminal device, and control method
AssigneeSharp Kabushiki Kaisha
InventorsYoko KUGE, Masafumi ARAMOTO
Life of this patent
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Abstract
An access network has a position management device function, the loss of connectivity to a core network by a base station is detected, and a state transition process, led by the base station, for transitioning to an Isolated E-UTRAN state is initiated on the basis of the detection. In the state transition process, by performing a reattach procedure from a terminal device, a switch to base station loop-back communication can be made. It is possible thereby to provide a communication control method by which communication between terminals present within the communication coverage of a base station which has lost connectivity to a core network is switched to base station loop-back communication.
Claims32
A base station device configured to:
- establish a first PDN connection to a first terminal device;
- establish a second PDN connection to a second terminal device,
- the first PDN connection and the second PDN connection being PDN connections established using an APN for which communication based on an Isolated E-UTRAN function has been permitted, and
- the Isolated E-UTRAN function being a user data transfer function by a base station device in a first state in which the base station device lacks connectivity to a core network and/or a second state in which connectivity of the base station device to the core network is limited;
- use the first PDN connection to receive user data transmitted by the first terminal device;
- and
- use the second PDN connection to transmit the user data to the second terminal device.
4 more elements
A base station device configure to:
- acquire an access point name (APN) included in a control message of an attach procedure initiated by a first terminal device,
- the APN being an APN for which communication based on an Isolated E-UTRAN function has been permitted, and
- the Isolated E-UTRAN function being a user data transfer function by a gateway in a first state in which the base station device lacks connectivity to a core network and/or a second state in which connectivity of the base station device to the core network is limited;
- select, in response to the acquiring of the APN, a first gateway the use of which as a gateway for providing a PDN connection in the Isolated E-UTRAN function is permitted;
- and
- permit a first PDN connection to be established between the first gateway and the first terminal device.
3 more elements
A terminal device configured to:
- establish a PDN connection using an access point name (APN) for which communication based on an Isolated E-UTRAN function has been permitted,
- the Isolated E-UTRAN function being a user data transfer function by a base station device or a gateway in a first state in which the base station device lacks connectivity to a core network and/or a second state in which connectivity of the base station device to the core network is limited, and
- the PDN connection being a PDN connection for which communication based on the Isolated E-UTRAN function has been permitted;
- and
- use the PDN connection to transmit the user data to the base station device.
2 more elements
A method of controlling a base station device, comprising:
- establishing a first PDN connection to a first terminal device;
- establishing a second PDN connection to a second terminal device,
- the first PDN connection and the second PDN connection being PDN connections established using an APN for which communication based on an Isolated E-UTRAN function has been permitted, and
- the Isolated E-UTRAN function being a user data transfer function employed by the base station device in a first state in which the base station device lacks connectivity to a core network and/or a second state in which connectivity of the base station device to the core network is limited;
- using the first PDN connection to receive user data transmitted by the first terminal device;
- and
- using the second PDN connection to transmit the user data to the second terminal device.
4 more elements
A method of controlling a base station device, comprising
- acquiring an access point name (APN) included in a control message of an attach procedure initiated by a first terminal device,
- the APN being an APN for which communication based on an Isolated E-UTRAN function has been permitted, and
- the Isolated E-UTRAN function being a user data transfer function by a gateway in a first state in which the base station device lacks connectivity to a core network and/or a second state in which connectivity of the base station device to the core network is limited;
- selecting, in response to the acquiring of the APN, a first gateway the use of which as a gateway for providing a PDN connection in the Isolated E-UTRAN function is permitted;
- and
- permitting a first PDN connection to be established between the first gateway and the first terminal device.
3 more elements
A method of controlling a terminal device, comprising:
- establishing a PDN connection using an access point name (APN) for which communication based on an Isolated E-UTRAN function has been permitted,
- the Isolated E-UTRAN function being a user data transfer function by a base station device or a gateway in a first state in which the base station device lacks connectivity to a core network and/or a second state in which connectivity of the base station device to the core network is limited, and
- the PDN connection being a PDN connection for which communication based on the Isolated E-UTRAN function has been permitted;
- and
- using the PDN connection to transmit the user data to the base station device.
2 more elements
Dependencies are inferred from the claim text.