# US 2021/0243681 A1 · Method and apparatus for supporting supplementary uplink frequencies in next generation mobile communication system

> Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt

- Number: US 2021/0243681 A1
- Document ID: US20210243681A1
- Status: Published application
- Kind: A1
- Application number: 17/301,664
- Filed: 2021-04-09
- Published: 2021-08-05
- Earliest claimed: 2017-08-11
- Assignees: Samsung Electronics Co., Ltd.
- Applicants: Samsung Electronics Co., Ltd.
- Inventors: Sangbum KIM; Jaehyuk JANG; Soenghun KIM; Alexander SAYENKO
- Web page: https://patentgrep.com/patent/US20210243681A1

## CPC

- H04W 48/12: using downlink control channel
- H04W 48/02: Access restriction performed under specific conditions
- H04W 52/38: TPC being performed in particular situations
- H04W 72/0473: {the resource being transmission power}
- H04W 48/16: Discovering, processing access restriction or access information
- H04W 52/365: {Power headroom reporting}
- H04W 52/367: {Power values between minimum and maximum limits, e.g. dynamic range}
- H04W 74/0833: Random access procedures, e.g. with 4-step access
- H04W 84/042: {Public Land Mobile systems, e.g. cellular systems}
- H04W 88/06: adapted for operation in multiple networks {or having at least two operational modes}, e.g. multi-mode terminals
- H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72)

## Abstract

The present disclosure relates to a communication scheme and system for converging a 5th generation (5G) communication system for supporting a data rate higher than that of a 4th generation (4G) system with an internet of things (IoT) technology. The present disclosure is applicable to intelligent services (e.g., smart home, smart building, smart city, smart car, connected car, health care, digital education, retail, and security and safety-related services) based on the 5G communication technology and the IoT-related technology. The present disclosure provides a method for preventing a legacy terminal from camping on an enhanced LTE (eLTE) base station that is connected to only a next generation (NG) core by combining a legacy information element (IE) and a new IE carried in system information broadcast by the base station in a next generation mobile communication system.

## Claims

### Claim 1

A method performed by a base station connected with at least one of a first core network or a second core network in a wireless communication system, the method comprising:
generating a system information block type 1 (SIB 1) message, the SIB 1 message including first information indicating if a cell associated with the base station is barred for connectivity to the first core network and second information indicating if the cell associated with the base station is barred for connectivity to the second core network;
transmitting, to a terminal, the SIB 1 message including the first information and the second information; and
receiving, from the terminal, an attach request message for connecting to the second core network, transmitted from the terminal based on the second information indicating that the cell associated with the base station is not barred for connectivity to the second core network,
wherein a list of public land mobile networks (PLMNs) for the second core network, included in the SIB 1 message, is used for an attachment of the terminal to the second core network.