# US 9,883,516 B2 · Method and apparatus for restricting frequency in wireless communication system

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- Number: US 9,883,516 B2
- Document ID: US9883516B2
- Status: Granted
- Kind: B2
- Application number: 14/760,954
- Filed: 2014-02-05
- Published: 2015-12-24
- Granted: 2018-01-30
- Earliest claimed: 2013-02-06
- Assignees: LG Electronics Inc.
- Applicants: LG Electronics Inc.
- Inventors: Jaewook Lee; Youngdae Lee; Sunghoon Jung
- Web page: https://patentgrep.com/patent/US9883516B2

## CPC

- H04W 72/541: using the level of interference
- H04W 8/245: {from a network towards a terminal}
- H04W 72/0453: Resources in frequency domain, e.g. a carrier in FDMA
- H04W 88/06: adapted for operation in multiple networks {or having at least two operational modes}, e.g. multi-mode terminals
- 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 restricting a frequency in a wireless communication system is provided. A user equipment (UE) receives restriction information and a timer value from a network, starts a timer based on the timer value, and restricts usage of a frequency based on the restriction information.

## Claims

### Claim 1

A method for restricting a frequency in a wireless communication system, the method performed by a first user equipment (UE) and comprising:
receiving restriction information from a 3rd generation partnership project (3GPP) access network, the information including an unusable frequency for a wireless network local area network (WLAN) and a timer value;
starting a timer based on the timer value; and
offloading traffic from the 3GPP access network to the WLAN based on the restriction information and the timer,
wherein use of the unusable frequency is restricted while the offloading is performed and the timer is running.

### Claim 2 (depends on 1)

The method of claim 1, wherein the restriction information further includes information related to the unusable frequency in an unlicensed band.

### Claim 3 (depends on 2)

The method of claim 2, wherein the unlicensed band is included in a 3GPP long-term evolution (LTE) band, a Wi-Fi band, a Bluetooth band, or a global positioning system (GPS) band.

### Claim 4 (depends on 2)

The method of claim 2, wherein the restriction information further includes at least a direction of in-device coexistence (IDC) interference or a cause value indicating that the unusable frequency in the unlicensed band is affected by the IDC interference.

### Claim 5 (depends on 1)

The method of claim 1, wherein the restriction information is based on in-device coexistence (IDC) indications from UEs other than the first UE.

### Claim 6 (depends on 1)

The method of claim 1, wherein the timer value is predetermined.

### Claim 7 (depends on 1)

The method of claim 1, wherein the UE transmits traffic using the WLAN instead of the 3GPP access network while the offloading is performed.

### Claim 8

A first user equipment (UE) for restricting a frequency in a wireless communication system, the UE comprising:
a radio frequency (RF) unit configured to transmit or receive a radio signal; and
a processor coupled to the RF unit, and configured to:
control the RF unit to receive restriction information from a 3rd generation partnership project (3GPP) access network, the information including an unusable frequency for a wireless network local area network (WLAN) and a timer value;
start a timer based on the timer value; and
offload traffic from the 3GPP access network to the WLAN based on the restriction information and the timer,
wherein use of the unusable frequency is restricted while the offloading is performed and the timer is running.

### Claim 9 (depends on 8)

The UE of claim 8, wherein the restriction information further includes information related to the unusable frequency in an unlicensed band.

### Claim 10 (depends on 9)

The UE of claim 9, wherein the unlicensed band is included in a 3GPP long-term evolution (LTE) band, a Wi-Fi band, a Bluetooth band, or a global positioning system (GPS) band.

### Claim 11 (depends on 9)

The UE of claim 9, wherein the restriction information further includes at least a direction of in-device coexistence (IDC) interference or a cause value indicating that the unusable frequency in the unlicensed band is affected by the IDC interference.

### Claim 12 (depends on 8)

The UE of claim 8, wherein the restriction information is based on in-device coexistence (IDC) indications from UEs other than the first UE.

### Claim 13 (depends on 8)

The UE of claim 8, wherein the timer value is predetermined.

### Claim 14 (depends on 8)

The UE of claim 8, wherein the UE transmits traffic using the WLAN instead of the 3GPP access network while the offloading is performed.