# US 10,455,483 B2 · Method and apparatus for performing access control for network sharing in wireless communication system

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- Number: US 10,455,483 B2
- Document ID: US10455483B2
- Status: Granted
- Kind: B2
- Application number: 15/319,923
- Filed: 2015-07-13
- Published: 2017-05-11
- Granted: 2019-10-22
- Earliest claimed: 2014-07-11
- Assignees: LG Electronics Inc.
- Applicants: LG Electronics Inc.
- Inventors: Youngdae Lee; Jaehyun Kim; Sunghoon Jung
- Web page: https://patentgrep.com/patent/US10455483B2

## CPC

- H04W 48/16: Discovering, processing access restriction or access information
- H04W 48/06: based on traffic conditions
- H04W 48/02: Access restriction performed under specific conditions
- H04W 84/042: {Public Land Mobile systems, e.g. cellular systems}
- 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 transmitting barring information in a wireless communication system is provided. A lower layer of a user equipment, i.e. a radio resource control (RRC) layer of the UE, receives system information including barring information for a plurality of public land mobile networks (PLMNs) from an evolved NodeB (eNB), and forwards barring information for a specific PLMN, among the barring information for the plurality of PLMNs, to an upper layer of the UE, i.e. an application layer of the UE.

## Claims

### Claim 1

A method performed by a user equipment (UE) in a wireless communication system, the method comprising:
receiving, by a radio resource control (RRC) layer of the UE from an evolved Node B (eNB), system information including service specific access control (SSAC) barring information for a plurality of public land mobile networks (PLMNs), wherein the SSAC barring information for the plurality of PLMNs includes information on a barring factor per each of the plurality of PLMNs and information on a barring time per each of the plurality of PLMNs;
selecting, by a non-access stratum (NAS) layer of the UE, a specific PLMN among the plurality of PLMNs;
selecting, by the RRC layer of the UE, specific SSAC barring information for the specific PLMN among the SSAC barring information for the plurality of PLMNs; and
forwarding, by the RRC layer of the UE to a multimedia telephony (MMTEL) layer of the UE, the specific SSAC barring information for the specific PLMN, wherein the specific SSAC barring information for the specific PLMN includes information on a barring factor for the specific PLMN and information on a barring time for the specific PLMN.

### Claim 2 (depends on 1)

The method of claim 1, further comprising receiving, by the RRC layer of the UE from the MMTEL layer of the UE, a request for the SSAC barring information for the specific PLMN.

### Claim 3 (depends on 1)

The method of claim 1, wherein the system information is a system information block type-2 (SIB2).

### Claim 4 (depends on 1)

The method of claim 1, wherein the plurality of PLMNs share a cell.

### Claim 5 (depends on 1)

The method of claim 1, wherein the specific PLMN is a registered PLMN (R-PLMN).

### Claim 6 (depends on 1)

The method of claim 1, wherein the SSAC barring information for the specific PLMN is forwarded upon PLMN selection or reselection, upon update of the SSAC barring information at a cell, or upon update of the system information at the cell.

### Claim 7 (depends on 1)

The method of claim 1, further comprising receiving, by the RRC layer of the UE from the NAS layer of the UE, a service request.

### Claim 8 (depends on 1)

The method of claim 1, further comprising performing, by the RRC layer of the UE, an access control barring (ACB) check for a service request on the specific PLMN based on the specific SSAC barring information for the specific PLMN.

### Claim 9 (depends on 1)

The method of claim 1, further comprising skipping, by the RRC layer of the UE, performing an access class barring (ACB) check according to ACB skip bits for the specific PLMN.

### Claim 10 (depends on 1)

The method of claim 1, further comprising transmitting, by the RRC layer of the UE to the eNB, a RRC connection request message.

### Claim 11

A user equipment (UE) comprising:
a memory;
a transceiver; and
a processor, coupled to the memory and the transceiver, that:
controls the transceiver to receive, by a radio resource control (RRC) layer of the UE from an evolved Node B (eNB), system information including service specific access control (SSAC) barring information for a plurality of public land mobile networks (PLMNs), wherein the SSAC barring information for the plurality of PLMNs includes information on a barring factor per each of the plurality of PLMNs and information on a barring time per each of the plurality of PLMNs,
selects, by a non-access stratum (NAS) layer of the UE, a specific PLMN among the plurality of PLMNs,
selects, by the RRC layer of the UE, specific SSAC barring information for the specific PLMN among the SSAC barring information for the plurality of PLMNs, and
forwards, by the RRC layer of the UE to a multimedia telephony (MMTEL) layer of the UE, the specific SSAC barring information for the specific PLMN, wherein the specific SSAC barring information for the specific PLMN includes information on a barring factor for the specific PLMN and information on a barring time for the specific PLMN.