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US 2017/0325055 A1Published application
Terminal device, base station device, mme, and communication control method
AssigneeSharp Kabushiki Kaisha
InventorsMasayuki ENOMOTO, Masafumi ARAMOTO
Life of this patent
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Abstract
An MME detects that a PDN connection is not effective and changes from a non-optimal gateway to a bearer established in a PDN connection using a more optimal gateway as an endpoint node. This configuration allows an already-established PDN connection to switch to a new PDN connection using the more optimal gateway, which achieves optimal communication control for continuing communication of UE.
Claims22
A terminal device configured to:
- establish a Packet Data Network (PDN) connection by transmitting an Access Point Name (APN) to a core network;
- establish a PDN connection, the PDN connection having a communication path thereof constituted of a communication path to a first gateway device and a communication path to a second gateway device;
- transmit and receive user data to and from the first gateway device using the PDN connection;
- initiate a service request procedure or a tracking area update procedure by transmitting, to a base station device, a SERVICE REQUEST message to make a transition from an idle state to an active state or a TRACKING AREA UPDATE REQUEST message to update a tracking area;
- and
- transmit and receive user data to and from the second gateway device using the PDN connection in accordance with the service request procedure or the tracking area update procedure.
3 more elements
A Mobility Management Entity (MME) configured to:
- receive, from a base station device, a SERVICE REQUEST message transmitted by a terminal device to make a transition from an idle state to an active state, or a TRACKING AREA UPDATE REQUEST message transmitted by the terminal device to update a tracking area;
- initiate a gateway change procedure for a Packet Data Network (PDN) connection in response to reception of the SERVICE REQUEST message or the TRACKING AREA UPDATE REQUEST message, the PDN connection having a communication path thereof constituted of a communication path to a first gateway device and a communication path to a second gateway device, the PDN connection being established by the terminal device, the gateway change procedure being a procedure for changing a communication path to be used for communication using the PDN connection from the communication path to the first gateway device to the communication path to the second gateway device;
- and
- transmit, to a base station device in the gateway change procedure, at least notification information for switching communication paths.
1 more element
A base station device configured to:
- in accordance with an attach procedure initiated by a terminal device,
- receive, from a core network, an ATTACH ACCEPT message including a first and second IP addresses associated with a Packet Data Network (PDN) connection and allocated to the terminal device, the PDN connection having a communication path thereof constituted of a communication path to a first gateway device and a communication path to a second gateway device;
- and
- transmit the ATTACH ACCEPT message to the terminal device.
1 more element
A communication control method for a terminal device, the method comprising the steps of:
- establishing a Packet Data Network (PDN) connection by transmitting an Access Point Name (APN) to a core network, the PDN connection having a communication path thereof constituted of a communication path to a first gateway device and a communication path to a second gateway device;
- transmitting and receiving user data to and from the first gateway device using the PDN connection;
- initiating a service request procedure or a tracking area update procedure by transmitting, to a base station device, a SERVICE REQUEST message to make a transition from an idle state to an active state or a TRACKING AREA UPDATE REQUEST message to update a tracking area;
- and
- transmitting and receiving user data to and from the second gateway device using the PDN connection in accordance with the service request procedure or the tracking area update procedure.
2 more elements
A communication control method for a Mobility Management Entity (MME), the method comprising the steps of:
- receiving, from a base station device, a SERVICE REQUEST message transmitted by a terminal device to make a transition from an idle state to an active state, or a TRACKING AREA UPDATE REQUEST message transmitted by the terminal device to update a tracking area;
- initiating a gateway change procedure for a Packet Data Network (PDN) connection in response to reception of the SERVICE REQUEST message or the TRACKING AREA UPDATE REQUEST message, the PDN connection having a communication path thereof constituted of a communication path to a first gateway device and a communication path to a second gateway device, the PDN connection being established by the terminal device, the gateway change procedure being a procedure for changing a communication path to be used for communication using the PDN connection from the communication path to the first gateway device to the communication path to the second gateway device;
- and
- transmitting, to a base station device in the gateway change procedure, at least notification information for switching communication paths.
1 more element
A communication control method for a base station device, the method comprising the steps of:
- in accordance with an attach procedure initiated by a terminal device,
- receiving, from a core network, an ATTACH ACCEPT message including a first and second IP addresses associated with a Packet Data Network (PDN) connection and allocated to the terminal device, the PDN connection having a communication path thereof constituted of a communication path to a first gateway device and a communication path to a second gateway device;
- and
- transmitting the ATTACH ACCEPT message to the terminal device.
1 more element
Dependencies are inferred from the claim text.