# US 2019/0357017 A1 · Mobile radio communications device for closed subscriber group management

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

- Number: US 2019/0357017 A1
- Document ID: US20190357017A1
- Status: Published application
- Kind: A1
- Application number: 16/531,855
- Filed: 2019-08-05
- Published: 2019-11-21
- Earliest claimed: 2010-06-21
- Assignees: NEC Corporation
- Applicants: NEC Corporation
- Inventors: Caroline Jactat
- Web page: https://patentgrep.com/patent/US20190357017A1

## CPC

- H04W 4/08: User group management
- H04L 63/101: {Access control lists [ACL]}
- H04W 8/183: {Processing at user equipment or user record carrier}
- H04W 12/08: Access security
- H04W 48/02: Access restriction performed under specific conditions
- 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)
- H04L: TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION (arrangements common to telegraphic and telephonic communication H04M)

## Abstract

The present invention provides for a mobile radio communications device, and related method of operation, arranged for closed subscriber group selection and for the storage of closed subscriber group information in the device, the stored information including information configured as a whitelist of closed subscriber group identities delivered between non-access-stratum layer and access-stratum layer within the device, and the device being further arranged to remove a previous user-selected closed subscriber group identity from the whitelist responsive to the device connecting to a cell is different from that identified by the previous user-selected closed subscriber group identity, and which different cell can comprise for example a non-CSG cell.

## Claims

### Claim 1

A mobile radio communications device, for a communications system, the mobile radio communications device comprising:
a non-access-stratum layer (NAS) and an access-stratum layer (AS); wherein the mobile radio communications device is configured to:
store a whitelist of closed subscriber group (CSG) identities, wherein the CSG whitelist is provided by the non-access-stratum layer to the access-stratum layer;
retrieve, from a Universal Subscriber Identity Module (USIM), at least one of an Allowed CSG list and an Operator CSG list, and to indicate, to a user, a list of CSGs to allow the user to make a selection of a closed subscriber group; and
provide, by said NAS to said AS, an updated closed subscriber group whitelist when the contents of the closed subscriber group whitelist have changed.

### Claim 2

A method of managing closed subscriber group selection in a mobile radio communications device for a communications system, the mobile radio communications device comprising a non-access-stratum layer (NAS) and an access-stratum layer (AS), the method comprising:
storing a whitelist of closed subscriber group (CSG) identities, wherein the CSG whitelist is provided by the non-access stratum layer to the access stratum layer;
retrieving, from a Universal Subscriber Identity Module (USIM), at least one of an Allowed CSG list and an Operator CSG list, and to indicate, to a user, a list of CSGs to allow the user to make a selection of a closed subscriber group; and
providing, by said NAS to said AS, an updated closed subscriber group whitelist when the contents of the closed subscriber group whitelist have changed.