# US 10,455,486 B2 · Method and apparatus for performing access control or membership verification for dual connectivity in wireless communication system

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- Number: US 10,455,486 B2
- Document ID: US10455486B2
- Status: Granted
- Kind: B2
- Application number: 15/995,799
- Filed: 2018-06-01
- Published: 2018-09-27
- Granted: 2019-10-22
- Earliest claimed: 2014-07-08
- Assignees: LG Electronics Inc.
- Applicants: LG Electronics Inc.
- Inventors: Jian Xu; Daewook Byun
- Web page: https://patentgrep.com/patent/US10455486B2

## CPC

- H04W 48/16: Discovering, processing access restriction or access information
- H04W 8/186: {Processing of subscriber group data}
- H04W 76/15: Setup of multiple wireless link connections
- H04W 84/045: {using private Base Stations, e.g. femto Base Stations, home Node B}
- 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 and apparatus for performing access control and/or membership verification for dual connectivity in a wireless communication system is provided. A first evolved NodeB (eNB) transmits a closed subscriber group (CSG) membership status of a user equipment (UE) to a second eNB, which is a home eNB (HeNB), and receives at least one of a CSG identifier (ID) or a cell access mode of the second eNB from the second eNB. A mobility management entity (MME) may verify the CSG membership status of the UE and transmit the verified CSG membership status of the UE to the first eNB. And then, the first eNB transmits the verified CSG membership status of the UE to the second eNB.

## Claims

### Claim 1

A method performed by a second base station in a wireless communication system, the method comprising:
establishing a dual connectivity between a user equipment (UE) and each of a first base station and the second base station, the establishing comprising:
receiving a secondary node addition request message including a closed subscriber group (CSG) membership status of the UE directly from the first base station;
trusting the CSG membership status of the UE; and
transmitting a secondary node addition request acknowledge message directly to the first base station as a response to the secondary node addition request message; and
after establishing the dual connectivity in which the UE is connected to both the first base station and the second base station:
receiving a verified CSG membership status of the UE from the first base station,
wherein the verified CSG membership status of the UE is first received by the first base station from a core network node which verifies the CSG membership status of the UE received from the first base station; and
updating the CSG membership status of the UE based on the verified CSG membership status of the UE.

### Claim 2 (depends on 1)

The method of claim 1,
wherein the first base station is a master eNB (MeNB) in the dual connectivity, and
wherein the second base station is a secondary eNB (SeNB) in the dual connectivity.

### Claim 3 (depends on 2)

The method of claim 2, wherein the SeNB is a home eNB (HeNB) which serves a hybrid cell.

### Claim 4 (depends on 1)

The method of claim 1, wherein the core network node is a mobility management entity (MME).

### Claim 5 (depends on 1)

The method of claim 1,
wherein the secondary node addition request message is a SeNB Addition Request message, and
wherein the secondary node addition request acknowledge message is a SeNB Addition Request Acknowledge message.

### Claim 6

A second base station in a wireless communication system, the second base station comprising:
a memory;
a transceiver; and
a processor, operably coupled to the memory and the transceiver, and configured to:
establish a dual connectivity between a user equipment (UE) and each of a first base station and the second base station, wherein the dual connectivity is established by:
controlling the transceiver to receive a secondary node addition request message including a closed subscriber group (CSG) membership status of the UE directly from the first base station;
trusting the CSG membership status of the UE; and
controlling the transceiver to transmit a secondary node addition request acknowledge message directly to the first base station as a response to the secondary node addition request message; and
after establishing the dual connectivity in which the UE is connected to both the first base station and the second base station:
control the transceiver to receive a verified CSG membership status of the UE from the first base station,
wherein the verified CSG membership status of the UE is first received by the first base station from a core network node which verifies the CSG membership status of the UE received from the first base station; and
update the CSG membership status of the UE based on the verified CSG membership status of the UE.

### Claim 7 (depends on 6)

The second base station of claim 6,
wherein the first base station is a master eNB (MeNB) in the dual connectivity, and
wherein the second base station is a secondary eNB (SeNB) in the dual connectivity.

### Claim 8 (depends on 7)

The second base station of claim 7, wherein the SeNB is a home eNB (HeNB) which serves a hybrid cell.

### Claim 9 (depends on 6)

The second base station of claim 6, wherein the core network node is a mobility management entity (MME).

### Claim 10 (depends on 6)

The second base station of claim 6,
wherein the secondary node addition request message is a SeNB Addition Request message, and
wherein the secondary node addition request acknowledge message is a SeNB Addition Request Acknowledge message.