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Terminal device, base station device, mme, and communication control method

Inactive Publication Date: 2017-11-09
SHARP KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The invention allows a device (e.g. a phone) to switch from one network to another, using a new network that is better for communication. This allows for smoother and more efficient communication.

Problems solved by technology

Hence, the PDN connection for SIPTO established by the UE may no longer be an optimal communication path as a result of the moving of the UE.

Method used

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  • Terminal device, base station device, mme, and communication control method
  • Terminal device, base station device, mme, and communication control method
  • Terminal device, base station device, mme, and communication control method

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first embodiment

1. First Embodiment

[0056]A first embodiment to which the present invention has been applied will be described with reference to the drawings.

1.1 Overview of Mobile Communication System

[0057]FIGS. 1A and 1B are diagrams illustrating an overview of a mobile communication system 1 according to the present embodiment. As illustrated in FIG. 1A, the mobile communication system 1 is constituted of UE (terminal device) 10 and a Packet Data Network (PDN) 90. The UE 10 and the PDN 90 connect to each other via an IP mobile communication network 5. The UE 10 connects to the IP mobile communication network 5, and the IP mobile communication network 5 is connected with the PDN 90.

[0058]The IP mobile communication network 5 may be a network constituted of a radio access network and a core network managed by a mobile network operator, or may be a broadband network managed by a fixed network operator, for example. Here, the broadband network may be an IP communication network that is managed by a n...

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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.

Description

TECHNICAL FIELD[0001]The present invention relates to a terminal device, a base station device, an MME, and a communication control method.BACKGROUND ART[0002]The 3rd Generation Partnership Project (3GPP), which is a group for standardizing mobile communication systems, is advancing the process of formulating specifications for the Evolved Packet System (EPS), which is described in NPL 1 below, as a next-generation mobile communication system.[0003]The following NPL 2 discloses a method for realizing the Selected IP Traffic Offload (SIPTO). SIPTO is a function that provides an offload communication path through which User Equipment (UE, terminal device) connects to an eNodeB (eNB, base station device) without the use of the core network of a mobile communication system. In this configuration, the UE establishes an offload communication path for SIPTO with a gateway device that is close in location to the UE.[0004]3GPP has been discussing that with a Local GW (LGW) set as a gateway d...

Claims

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Application Information

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IPC IPC(8): H04W4/02H04W60/00H04W80/04H04W88/16H04W4/029
CPCH04W4/02H04W80/04H04W88/16H04W60/00H04W60/04H04W36/125H04W76/22H04W36/12H04W4/029H04W76/10
Inventor ENOMOTO, MASAYUKIARAMOTO, MASAFUMI
Owner SHARP KK