# US 2022/0046522 A1 · Method and device for supporting multiple scg configurations in dual connectivity supported by next-generation mobile communication system

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- Number: US 2022/0046522 A1
- Document ID: US20220046522A1
- Status: Published application
- Kind: A1
- Application number: 17/393,717
- Filed: 2021-08-04
- Published: 2022-02-10
- Earliest claimed: 2020-08-05
- Assignees: Samsung Electronics Co., Ltd.
- Applicants: Samsung Electronics Co., Ltd.
- Inventors: Donggun KIM; Soenghun KIM; Jaehyuk JANG
- Web page: https://patentgrep.com/patent/US20220046522A1

## CPC

- H04W 48/16: Discovering, processing access restriction or access information
- H04W 76/15: Setup of multiple wireless link connections
- H04W 52/365: {Power headroom reporting}
- H04W 76/34: Selective release of ongoing connections
- Y02D 30/70: in wireless communication networks
- H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72)
- Y02D: CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE

## Abstract

The disclosure relates to a communication method and system for converging a 5th-Generation (5G) communication system for supporting higher data rates beyond a 4th-Generation (4G) system with a technology for Internet of Things (IoT). The disclosure may be applied to intelligent services based on the 5G communication technology and the IoT-related technology, such as smart home, smart building, smart city, smart car, connected car, health care, digital education, smart retail, security and safety services. A method performed by a terminal in a communication system is provided. The method includes receiving, from a first base station, configuration information for a secondary cell group (SCG) including at least one serving cell associated with a second base station, receiving, from the first base station, a first message for activation or deactivation of the SCG, and in case that the SCG is deactivated based on the first message and uplink data arrives on at least one bearer of the SCG, transmitting a second message for activation of the SCG. According to the disclosure, carrier aggregation and dual connectivity can be quickly activated, thereby reducing battery consumption of a terminal.

## Claims

### Claim 1

A method performed by a terminal in a communication system, the method comprising:
receiving, from a first base station, configuration information for a secondary cell group (SCG) including at least one serving cell associated with a second base station;
receiving, from the first base station, a first message for activation or deactivation of the SCG; and
in case that the SCG is deactivated based on the first message and uplink data arrives on at least one bearer of the SCG, transmitting a second message for activation of the SCG.

### Claim 2 (depends on 1)

The method of claim 1, further comprising:
identifying that the SCG is activated based on the first message; and
in case that the activated SCG is identified to be deactivated, transmitting a third message for deactivation of the activated SCG.

### Claim 3 (depends on 1)

The method of claim 1, wherein each of the first message and the second message is a radio resource control (RRC) message.

### Claim 4 (depends on 1)

The method of claim 1, wherein the configuration information for the SCG is stored in the terminal.

### Claim 5 (depends on 1)

The method of claim 1, wherein, in case that the SCG is activated based on the first message, a power headroom report (PHR) is triggered in the terminal.

### Claim 6

A method performed by a first base station in a communication system, the method comprising:
transmitting, to a terminal, configuration information for a secondary cell group (SCG) including at least one serving cell associated with a second base station;
transmitting, to the terminal, a first message for activation or deactivation of the SCG; and
in case that the SCG is deactivated based on the first message and uplink data arrives on at least one bearer of the SCG, receiving, from the terminal, a second message for activation of the SCG.

### Claim 7 (depends on 6)

The method of claim 6, further comprising:
in case that the SCG being activated based on the first message is identified to be deactivated, receiving, from the terminal, a third message for deactivation of the activated SCG.

### Claim 8 (depends on 6)

The method of claim 6, wherein each of the first message and the second message is a radio resource control (RRC) message.

### Claim 9 (depends on 6)

The method of claim 6, wherein the configuration information for the SCG is stored in the terminal.

### Claim 10 (depends on 6)

The method of claim 6, wherein, in case that the SCG is activated based on the first message, a power headroom report (PHR) is triggered in the terminal.

### Claim 11

A terminal in a communication system, the terminal comprising:
a transceiver; and
a controller configured to:
receive, from a first base station via the transceiver, configuration information for a secondary cell group (SCG) including at least one serving cell associated with a second base station,
receive, from the first base station via the transceiver, a first message for activation or deactivation of the SCG, and
in case that the SCG is deactivated based on the first message and uplink data arrives on at least one bearer of the SCG, transmit a second message for activation of the SCG via the transceiver.

### Claim 12 (depends on 11)

The terminal of claim 11, wherein the controller is further configured to:
identify that the SCG is activated based on the first message, and
in case that the activated SCG is identified to be deactivated, transmit a third message for deactivation of the activated SCG via the transceiver.

### Claim 13 (depends on 11)

The terminal of claim 11, wherein each of the first message and the second message is a radio resource control (RRC) message.

### Claim 14 (depends on 11)

The terminal of claim 11, wherein the configuration information for the SCG is stored in the terminal.

### Claim 15 (depends on 11)

The terminal of claim 11, wherein, in case that the SCG is activated based on the first message, a power headroom report (PHR) is triggered in the terminal.

### Claim 16

A first base station in a communication system, the first base station comprising:
a transceiver; and
a controller configured to:
transmit, to a terminal via the transceiver, configuration information for a secondary cell group (SCG) including at least one serving cell associated with a second base station,
transmit, to the terminal via the transceiver, a first message for activation or deactivation of the SCG, and
in case that the SCG is deactivated based on the first message and uplink data arrives on at least one bearer of the SCG, receive, from the terminal via the transceiver, a second message for activation of the SCG.

### Claim 17 (depends on 16)

The first base station of claim 16, wherein the controller is further configured:
in case that the SCG being activated based on the first message is identified to be deactivated, receive, from the terminal via the transceiver, a third message for deactivation of the activated SCG.

### Claim 18 (depends on 16)

The first base station of claim 16, wherein each of the first message and the second message is a radio resource control (RRC) message.

### Claim 19 (depends on 16)

The first base station of claim 16, wherein the configuration information for the SCG is stored in the terminal.

### Claim 20 (depends on 16)

The first base station of claim 16, wherein, in case that the SCG is activated based on the first message, a power headroom report (PHR) is triggered in the terminal.