Terminal and method for receiving data through unlicensed band

• US 9,949,295 B2
• Filed: 06/29/2015
• Issued: 04/17/2018
• Est. Priority Date: 07/07/2014
• Status: Active Grant

• Current Assignee: LG Electronics, Inc. (LG Corporation)
• Original Assignee: LG Electronics, Inc. (LG Corporation)
• Inventors: You, Hyangsun, Yi, Yunjung, Ahn, Joonkui, Seo, Hanbyul, Park, Jonghyun
• Primary Examiner(s): LE, DANH C
• Application Number:
  US15/324,664
• Publication Number:
  US 20170208627A1
• Time in Patent Office: 1,023 Days
• Field of Search: 4554521, 4555521, 455450, 370329
• CPC Class Codes: H04J 11/00 Orthogonal multiplex systems, e.g. using WALSH codesH04J13/00 takes precedence
• CPC Class Codes: H04L 5/001 the frequencies being arranged in component carriers
• CPC Class Codes: H04L 5/0091 Signaling for the administration of the divided path
• CPC Class Codes: H04L 5/0098 Signalling of the activation or deactivation of component carriers, subcarriers or frequency bands
• CPC Class Codes: H04W 72/0446 Resources in time domain, e.g. slots or frames
• CPC Class Codes: H04W 72/23 in the downlink direction of a wireless link, i.e. towards a terminal
• CPC Class Codes: H04W 74/0816 with collision avoidance
• CPC Class Codes: H04W 84/12 WLAN [Wireless Local Area Networks]

Abstract

Provided in one embodiment of the present invention is a method for receiving data through an unlicensed band. The method is a method for receiving data using a terminal using both a licensed band and an unlicensed band, for the purpose of communicating with a mobile communication base station, and comprises the steps of: transmitting through the unlicensed band, a Clear To Send (CTS) frame defined by a wireless LAN (WLAN), before receiving a data channel from the mobile communication base station; and a specific frame or a specific subframe receiving, through the unlicensed band and from the mobile communication base station, a data channel, after transmitting the CTS frame, wherein the specific frame or the specific subframe by which the data channel is received can be a frame or a subframe used in a mobile communication system which is operated on the licensed band.

Claims

1. A method of receiving data by a terminal using both a licensed band and an unlicensed band for communicating with a mobile communication base station, the method comprising:

receiving, through the licensed band and from the base station, a Clear To Send (CTS) request for requesting the terminal to transmit a CTS frame defined by a Wireless LAN (WLAN) system;

transmitting, through the unlicensed band, the CTS frame, before receiving a data channel from the mobile communication base station; and

receiving, through the unlicensed band and from the mobile communication base station, a data channel at a specific frame or a specific subframe, after transmitting the CTS frame, and

wherein the specific frame or a specific subframe by which the data channel is received, is a frame or a subframe used in a mobile communication system by which is operated on the licensed band, and

wherein the CTS request includes at least one of information on a timing at which the CTS frame is to be transmitted, information on a value of duration included in a duration field of the CTS frame, information on a timing at which a data transmission channel is started, or information on a duration during which the data transmission channel is to be progressed.

2. The method of claim 1, wherein the mobile communication system is a LTE (Long Term Evolution) or a LTE-A (Long Term Evolution-Advanced) system.

3. The method of claim 1, wherein the CTS request is received through a PDCCH or a higher layer signaling.

4. The method of claim 1, further comprising transmitting, to the base station through the licensed band, a CTS indication to indicate that the CTS frame has been transmitted.

5. The method of claim 4, wherein the CTS indication includes at least one of information on a timing at which a data transmission channel is started, or information on a duration during which the data transmission channel is to be progressed.

6. A terminal using both a licensed band and an unlicensed band for communicating with a mobile communication base station, comprising

a Radio Frequency (RF) unit;

and

a processor configured to control the RF unit to;

receive, through the licensed band and from the base station, a Clear To Send (CTS) request for requesting the terminal to transmit a CTS frame defined by a Wireless LAN (WLAN) system;

transmit, through the unlicensed band, the CTS frame, before receiving a data channel from the mobile communication base station; and

receive, through the unlicensed band and from the mobile communication base station, a data channel at a specific frame or a specific subframe, after transmitting the CTS frame, and

wherein the specific frame or a specific subframe by which the data channel is received, is a frame or a subframe used in a mobile communication system by which is operated on the licensed band, and

wherein the CTS request includes at least one of information on a timing at which the CTS frame is to be transmitted, information on a value of duration included in a duration field of the CTS frame, information on a timing at which a data transmission channel is started, or information on a duration during which the data transmission channel is to be progressed.

7. The terminal of claim 6, wherein the mobile communication system is a LTE (Long Term Evolution) or a LTE-A (Long Term Evolution-Advanced) system.

8. The terminal of claim 6, wherein the CTS request is received through a PDCCH or a higher layer signaling.

9. The terminal of claim 6, wherein the processor further configured to control the RF unit to transmit, to the base station through the licensed band, a CTS indication to indicate that the CTS frame has been transmitted.

10. The terminal of claim 9, wherein the CTS indication includes at least one of information on a timing at which a data transmission channel is started, or information on a duration during which the data transmission channel is to be progressed.