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Base station, wireless terminal, method and non-transitory computer readable medium

A technology for wireless terminals and base stations, applied in the field of wireless communication systems, can solve problems such as inability to distinguish UEs

Active Publication Date: 2021-11-16
NEC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, 5G-CN cannot distinguish whether UE is in RRC_CONNECTED state or RRC_INACTIVE state

Method used

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  • Base station, wireless terminal, method and non-transitory computer readable medium
  • Base station, wireless terminal, method and non-transitory computer readable medium
  • Base station, wireless terminal, method and non-transitory computer readable medium

Examples

Experimental program
Comparison scheme
Effect test

no. 1 example

[0058] Figure 5 A configuration example of a wireless communication network according to various embodiments including the present embodiment is shown. exist Figure 5 In the example of , the wireless communication network includes 5G UE 2, 5G-RAN 3 and 5G-CN 4.

[0059] 5G-CN 4 includes a control plane network function (CP NF) and a user plane network function (UP NF) not shown, and provides a plurality of network slices. The network slices are distinguished from one another according to, for example, the services or use cases provided to UEs on the respective network slices. Use cases include, for example, enhanced mobile broadband (eMBB), highly reliable and low latency communications (URLLC) and massive machine type communications (mMTC).

[0060] 5G-RAN 3 includes multiple gNBs including gNB 1A and gNB 1B. Each gNB 1 (eg, gNB 1A and gNB 1B) serves at least one cell 11 (eg, cell 11A and cell 11B). Each gNB 1 is connected to a 5G-CN 4 and supports one or more network ...

no. 2 example

[0089] This embodiment provides a modified example of the mobility of the UE 2 in the RRC_INACTIVE state. An example of the structure of the wireless communication network according to the present embodiment and Figure 5 The structure example is the same.

[0090] The gNB 1 according to this embodiment is configured to implicitly inform the UE 2 that one or The RAN used by the UE 2 informs whether multiple network slices are available in each cell included in the area. More specifically, in this embodiment, gNB 1 is configured to include only one or more cells that can use (or support) the network slice configured for UE 2 in RRC_CONNECTED state in the UE 2 in RRC_INACTIVE state. RAN notification area, and configure the RAN notification area in UE2. Thus, the RAN notification area implicitly indicates that the network slices configured in the UE 2 are available in the cells included in the RAN notification area.

[0091] Figure 10 is a flowchart illustrating process 100...

no. 3 example

[0098] This embodiment provides a modified example of the mobility of the UE 2 in the RRC_INACTIVE state. An example of the structure of the wireless communication network according to the present embodiment and Figure 5 The structure example is the same.

[0099] The gNB 1 according to this embodiment is configured to transmit system information (SI) in each cell of itself indicating one or more network slices available (or supported) or not available (or not supported) in the cell. The system information may be included in a broadcast system information block to be broadcast in each cell. Optionally, the system information may be included in an on-demand system information block to be sent to the UE 2 in response to a request message from the UE 2 or in response to a trigger within the network.

[0100] Figure 12 is a sequence diagram showing a process 1200 as an example of the operations of gNB 1 and UE 2 according to the present embodiment. In step 1201, UE 2 is in t...

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Abstract

A base station (1) controls state transitions of a wireless terminal (2) between a first RRC state, a second RRC state and a third RRC state. In addition, the base station (1) notifies the wireless terminal (2) explicitly or implicitly of the network slice configured in the wireless terminal (2) for data communication in at least the first RRC state configured in the RAN (3) The RAN notifies whether each cell included in the area is available. Thus, for example, a wireless terminal in a first state (eg, RRC_INACTIVE state) can be enabled to easily know the cell to be reselected or the availability of a network slice in the reselected cell.

Description

technical field [0001] The present invention relates to wireless communication systems, and in particular, to mobility of wireless terminals. Background technique [0002] The 3rd Generation Partnership Project (3GPP) has started the standardization of the fifth generation mobile communication system (5G) (ie, 3GPP Release 14) in 2016 to make 5G a commercial reality in 2020 or later (see Non-Patent Document 1 ). 5G is expected to be enabled through continued enhancements / evolutions of LTE and LTE-Advanced as well as through innovative enhancements / evolutions that introduce new 5G air interfaces, ie new radio access technologies (RATs). New RATs support eg higher frequency bands than those supported by LTE / LTE-Advanced and its continued evolutions (eg below 6 GHz). For example, new RATs support centimeter-wave bands (above 10GHz) and millimeter-wave bands (above 30GHz). [0003] In this specification, the fifth generation mobile communication system is referred to as a 5G ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04W48/08
CPCH04W88/08H04W76/27H04W48/08H04W88/02H04W48/12H04W48/14H04W48/20H04W74/002
Inventor 二木尚林贞福
Owner NEC CORP