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Terminal device, base station device, and method

A terminal device and base station technology, which is applied in the direction of security devices, connection management, electrical components, etc., can solve the problems of complex protocol processing, different functions, inability to communicate efficiently between base station devices and terminal devices, and achieve efficient communication and reduce complexity. Effect

Active Publication Date: 2021-08-24
SHARP KK +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0025] However, there is a problem that the format and function of the communication protocol used in E-UTRA and NR are different, and therefore, as described in Non-Patent Document 8, the core network used in accordance with the form of MR-DC is different, so it is different from Compared with the dual connectivity (Dual Connectivity) in the conventional LTE which uses only E-UTRA as the RAT and only the EPC as the core network of LTE as the core network, the protocol processing becomes more complicated, and the communication between the base station device and the terminal device cannot be efficiently performed. Communication

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  • Terminal device, base station device, and method
  • Terminal device, base station device, and method
  • Terminal device, base station device, and method

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Embodiment approach

[0091] use Figure 1 to Figure 8 , the embodiment of the present invention will be described. In the embodiment of the present invention, the process when the connection destination core network of UE 122 is switched from EPC 104 to 5GC 110 by handover or the like will be described. The switching of the connection destination core network of UE 122 from EPC 104 to 5GC 110 may mean switching from a state in which UE 122 is connected to EPC 104 via eNB 102 to a state in which UE 122 is connected to 5GC 110 via eNB 102 . In addition, switching the connection destination core network of UE 122 from EPC 104 to 5GC 110 may refer to switching from a state in which UE 122 is connected to EPC 104 via eNB 102 to a state in which UE 122 is connected to 5GC 110 via gNB 108 .

[0092] It should be noted that, in the embodiment of the present invention, the switching accompanying the switching of the core network of the connection destination of the terminal device is referred to as an int...

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Abstract

This terminal device, which communicates with a base station device, is provided with a reception unit for receiving an RRC message from the base station device, and a processing unit. The RRC message is a message indicating a movement from a first RAT to a second RAT, wherein the first RAT is NR. The processing unit performs a process in which, on the basis of the RRC message including information indicating that the second RAT is UTRA, information included in the RRC message that is used for key synchronization and key freshness is transferred to a higher layer.

Description

technical field [0001] The present invention relates to a terminal device, a base station device and a method. This application claims priority based on Japanese Patent Application No. 2019-2865 filed in Japan on January 10, 2019, the contents of which are incorporated herein. Background technique [0002] In the 3rd Generation Partnership Project (3rd Generation Partnership Project: 3GPP), wireless access methods for cellular mobile communications, wireless networks (hereinafter referred to as "Long Term Evolution (LTE: registered trademark))" or " Evolved Universal Terrestrial Radio Access (Evolved Universal Terrestrial Radio Access: EUTRA)") and a core network (hereinafter, "Evolved Packet Core (Evolved Packet Core: EPC)") have been studied. [0003] In addition, in 3GPP, LTE-Advanced Pro, which is an extended technology of LTE, and NR (New Radiotechnology), which is a new wireless access technology, have been developed as wireless access methods and wireless network tec...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W36/14H04W12/0433H04W88/06
CPCH04W36/0033H04W76/16H04W36/328H04W76/30H04W36/0038
Inventor 堀贵子山田升平坪井秀和
Owner SHARP KK