# US 2021/0243834 A1 · Method and device for controlling mobility of terminal, and terminal

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

- Number: US 2021/0243834 A1
- Document ID: US20210243834A1
- Status: Published application
- Kind: A1
- Application number: 17/236,723
- Filed: 2021-04-21
- Published: 2021-08-05
- Earliest claimed: 2018-10-23
- Assignees: Guangdong Oppo Mobile Telecommunications Corp., Ltd.
- Applicants: Guangdong Oppo Mobile Telecommunications Corp., Ltd.
- Inventors: SHUKUN WANG; Ning Yang
- Web page: https://patentgrep.com/patent/US20210243834A1

## CPC

- H04W 48/20: Selecting an access point
- H04W 76/27: Transitions between radio resource control [RRC] states
- H04W 8/02: Processing of mobility data, e.g. registration information at HLR [Home Location Register] or VLR [Visitor Location Register]; Transfer of mobility data, e.g. between HLR, VLR or external networks
- H04W 36/0058: {Transmission of hand-off measurement information, e.g. measurement reports}
- H04W 36/0079: {in case of hand-off failure or rejection}
- H04W 76/30: Connection release
- H04W 36/305: {Handover due to radio link failure (control signalling for hand-off failure H04W36/0079)}
- H04W 76/18: Management of setup rejection or failure
- H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72)

## Abstract

A method for controlling mobility of a terminal includes: after receiving configuration of a Signal Radio Bearer (SRB) 1, the terminal enters a Radio Resource Control (RRC) connected state; in response to that the terminal in the RRC connected state does not receive configuration of a Data Radio Bearer (DRB) and/or configuration of an SRB2, the terminal reports, based on measurement configuration of the network side, a measurement result to the network side, wherein the measurement result is used by the network side to determine a target cell; and the terminal receives an RRC release message from the network side, wherein the RRC release message carries reference information of the target cell.

## Claims

### Claim 1

A method for controlling mobility of a terminal, comprising:
obtaining, by a terminal, a first threshold configured by a network side;
after receiving configuration of a Signal Radio Bearer (SRB) 1, entering, by the terminal, a Radio Resource Control (RRC) connected state; and
in response to that the terminal in the RRC connected state does not receive configuration of a Data Radio Bearer (DRB) and/or configuration of an SRB2, determining, by the terminal, whether to release an RRC connection and return to an idle state based on a measurement result of a serving cell and the first threshold.

### Claim 2 (depends on 1)

The method of claim 1, wherein obtaining, by the terminal, the first threshold configured by the network side comprises:
obtaining, by the terminal, the first threshold from system broadcast information or a User Equipment (UE) dedicated signaling.

### Claim 3 (depends on 1)

The method of claim 1, wherein determining, by the terminal, whether to release the RRC connection and return to the idle state based on the measurement result of the serving cell and the first threshold comprises:
in response to that the measurement result of the serving cell is less than the first threshold, releasing, by the terminal, the RRC connection and returning to the idle state.

### Claim 4 (depends on 1)

The method of any one of claim 1, wherein the configuration of the SRB1 is carried in an RRC connection setup message.

### Claim 5

A method for controlling mobility of a terminal, comprising:
after receiving configuration of a Signal Radio Bearer (SRB) 1, entering, by the terminal, a Radio Resource Control (RRC) connected state;
in response to that the terminal in the RRC connected state does not receive configuration of a Data Radio Bearer (DRB) and/or configuration of an SRB2, reporting, by the terminal based on measurement configuration of the network side, a measurement result to the network side, wherein the measurement result is used by the network side to determine a target cell; and
receiving, by the terminal, an RRC release message from the network side, wherein the RRC release message carries reference information of the target cell.

### Claim 6 (depends on 5)

The method of claim 5, wherein the reference information of the target cell comprises at least one of: a Physical Cell Identifier (PCI), frequency information or Radio Access Type (RAT) information.

### Claim 7 (depends on 5)

The method of claim 5, wherein the RRC release message further carries system broadcast information of the target cell.

### Claim 8 (depends on 5)

The method of claim 5, wherein the configuration of the SRB1 is carried in an RRC connection setup message, and the measurement configuration is carried in an RRC reconfiguration message.

### Claim 9

A device for controlling mobility of a terminal, applied to a terminal, the device comprising:
a memory storing processor-executable instructions; and
a processor configured to execute the stored processor-executable instructions to perform operations of:
obtaining a first threshold configured by a network side;
after receiving configuration of a Signal Radio Bearer (SRB) 1, entering a Radio Resource Control (RRC) connected state; and
in response to that the terminal in the RRC connected state does not receive configuration of a Data Radio Bearer (DRB) and/or configuration of an SRB2, determining, based on a measurement result of a serving cell and the first threshold, whether to release an RRC connection and return to an idle state.

### Claim 10 (depends on 9)

The device of claim 9, wherein obtaining the first threshold configured by the network side comprises:
obtaining the first threshold from system broadcast information or a User Equipment (UE) dedicated signaling.

### Claim 11 (depends on 9)

The device of claim 9, wherein determining whether to release the RRC connection and return to the idle state based on the measurement result of the serving cell and the first threshold comprises:
in response to that the measurement result of the serving cell is less than the first threshold, releasing the RRC connection and returning to the idle state.

### Claim 12 (depends on 9)

The device of claim 9, wherein the configuration of the SRB1 is carried in an RRC connection setup message.

### Claim 13 (depends on 5)

A device for controlling mobility of a terminal, applied to a terminal, the device comprising:
a memory storing processor-executable instructions; and
a processor configured to execute the stored processor-executable instructions to perform the method of claim 5.

### Claim 14 (depends on 13)

The device of claim 13, wherein reference information of the target cell comprises at least one of: a Physical Cell Identifier (PCI), frequency information or Radio Access Type (RAT) information.

### Claim 15 (depends on 13)

The device of claim 13, wherein the RRC release message further carries system broadcast information of the target cell.

### Claim 16 (depends on 13)

The device of claim 13, wherein the configuration of the SRB1 is carried in an RRC connection setup message, and the measurement configuration is carried in an RRC reconfiguration message.

### Claim 17 (depends on 1)

A non-transitory computer-readable storage medium having stored thereon computer-executable instructions that, when executed by a processor, cause the processor to perform the method of claim 1.