# US 12,114,203 B2 · Apparatus and method for managing connections in wireless communication system

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- Number: US 12,114,203 B2
- Document ID: US12114203B2
- Status: Granted
- Kind: B2
- Application number: 18/196,735
- Filed: 2023-05-12
- Published: 2023-09-07
- Granted: 2024-10-08
- Earliest claimed: 2017-06-16
- Assignees: Samsung Electronics Co., Ltd.
- Applicants: Samsung Electronics Co., Ltd.
- Inventors: Xiaowan Ke; Lixiang Xu; Hong Wang
- Web page: https://patentgrep.com/patent/US12114203B2

## CPC

- H04W 28/0268: {using specific QoS parameters for wireless networks, e.g. QoS class identifier [QCI] or guaranteed bit rate [GBR] (negotiating SLA or negotiating QoS H04W28/24)}
- H04W 28/0263: {involving mapping traffic to individual bearers or channels, e.g. traffic flow template [TFT]}
- H04W 28/0864: {of different hierarchy levels, e.g. Master Evolved Node B [MeNB] or Secondary Evolved node B [SeNB]}
- H04W 76/12: Setup of transport tunnels
- H04W 76/15: Setup of multiple wireless link connections
- H04W 76/30: Connection release
- H04W 16/32: Hierarchical cell structures
- H04W 76/11: Allocation or use of connection identifiers
- H04W 88/08: Access point devices
- H04W 92/20: between access points
- H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72)

## Abstract

Methods and apparatuses are provided in a wireless communication system. A first message is transmitted, to a secondary base station, for querying a first secondary cell group (SCG) configuration associated with the secondary base station. A second message is received from the secondary base station after transmitting the first message. The first message includes information indicating that the master base station requests the first SCG configuration, and the second message includes information on the first SCG configuration.

## Claims

### Claim 1

A method performed by a master base station in a wireless communication system, the method comprising:
transmitting, to a secondary base station, a modification request message for querying a first secondary cell group (SCG) configuration associated with the secondary base station; and
receiving, from the secondary base station, a modification response message, after transmitting the modification request message,
wherein, in case that the modification request message includes information indicating that the master base station requests the first SCG configuration,
the modification response message includes a container for a radio resource control (RRC) message including information on the first SCG configuration.

### Claim 2 (depends on 1)

The method of claim 1, further comprising transmitting, to another secondary base station, a first message for a secondary base station change, after receiving the modification response message.

### Claim 3 (depends on 2)

The method of claim 2, wherein the first message includes the information on the first SCG configuration.

### Claim 4 (depends on 2)

The method of claim 2, further comprising receiving, from the other secondary base station, a second message, after transmitting the first message,
wherein the second message includes information on a second SCG configuration associated with the other secondary base station.

### Claim 5 (depends on 2)

The method of claim 2, further comprising transmitting, to the secondary base station, a third message for requesting to release resources.

### Claim 6 (depends on 5)

The method of claim 5, further comprising transmitting, to the other secondary base station, a fourth message for informing a completion of reconfiguration.

### Claim 7

A method performed by a secondary base station in a wireless communication system, the method comprising:
receiving, from a master base station, a modification request message for querying a secondary cell group (SCG) configuration associated with the secondary base station; and
transmitting, to the master base station, a modification response message, after receiving the modification request message,
wherein, in case that the modification request message includes information indicating that the master base station requests the SCG configuration,
the modification response message includes a container for a radio resource control (RRC) message including information on the SCG configuration.

### Claim 8 (depends on 7)

The method of claim 7, further comprising receiving, from the master base station, a message for requesting to release resources.

### Claim 9

A master base station in a wireless communication system, the master base station comprising:
a transceiver; and
a controller coupled with the transceiver and configured to:
transmit, to a secondary base station, a modification request message for querying a first secondary cell group (SCG) configuration associated with the secondary base station; and
receive, from the secondary base station, a modification response message, after transmitting the modification request message,
wherein, in case that, the modification request message includes information indicating that the master base station requests the first SCG configuration, and
wherein the modification response message includes a container for a radio resource control (RRC) message including information on the first SCG configuration.

### Claim 10 (depends on 9)

The master base station of claim 9, wherein the controller is further configured to transmit, to another secondary base station, a first message for a secondary base station change, after receiving the modification response message.

### Claim 11 (depends on 10)

The master base station of claim 10, wherein the first message includes the information on the first SCG configuration.

### Claim 12 (depends on 10)

The master base station of claim 10, wherein the controller is further configured to receive, from the other secondary base station, a second message, after transmitting the first message, and
wherein the second message includes information on a second SCG configuration associated with the other secondary base station.

### Claim 13 (depends on 10)

The master base station of claim 10, wherein the controller is further configured to transmit, to the secondary base station, a third message for requesting to release resources.

### Claim 14 (depends on 13)

The master base station of claim 13, wherein the controller is further configured to transmit, to the other secondary base station, a fourth message for informing a completion of reconfiguration.

### Claim 15

A secondary base station in a wireless communication system, the secondary base station comprising:
a transceiver; and
a controller coupled with the transceiver and configured to:
receive, from a master base station, a modification request message for querying a secondary cell group (SCG) configuration associated with the secondary base station; and
transmit, to the master base station, a modification response message, after receiving the modification request message,
wherein, in case that the modification request message includes information indicating that the master base station requests the SCG configuration,
the modification response message includes a radio resource control (RRC) message including information associated with the SCG configuration.

### Claim 16 (depends on 15)

The secondary base station of claim 15, wherein the controller is further configured to receive, from the master base station, a message for requesting to release resources.