Method for eliminating inter-cell interference in non-licensed band in wireless communication system and apparatus therefor

• US 9,913,171 B2
• Filed: 09/16/2015
• Issued: 03/06/2018
• Est. Priority Date: 09/18/2014
• Status: Active Grant

• Current Assignee: LG Electronics, Inc. (LG Corporation)
• Original Assignee: LG Electronics, Inc. (LG Corporation)
• Inventors: Seo, Hanbyul, Ahn, Joonkui, Kim, Kijun
• Primary Examiner(s): ZEWDU, MELESS NMN
• Application Number:
  US15/327,019
• Publication Number:
  US 20170171781A1
• Time in Patent Office: 902 Days
• CPC Class Codes: H04J 11/0036 at the receiver
• CPC Class Codes: H04J 11/005 of intercell interference
• CPC Class Codes: H04J 2211/001 using small cells within macro cells, e.g. femto, pico or microcells
• CPC Class Codes: H04W 16/14 Spectrum sharing arrangements between different networks
• CPC Class Codes: H04W 24/10 Scheduling measurement reports ; Arrangements for measurement reports
• CPC Class Codes: H04W 28/0247 based on conditions of the access network or the infrastructure network central resource management H04W28/16
• CPC Class Codes: H04W 28/0268 using specific QoS parameters for wireless networks, e.g. QoS class identifier [QCI] or guaranteed bit rate [GBR] negotiating SLA or negotiating QoS H04W28/24
• CPC Class Codes: H04W 28/18 Negotiating wireless communication parameters
• CPC Class Codes: H04W 28/26 Resource reservation

Abstract

The present application discloses a method for reporting, by a terminal, channel state information in a non-licensed band in a wireless communication system. More specifically, the method comprises: establishing, through a higher layer, a plurality of reserved resource sections of a serving cell for channel state information measurement in the non-licensed band; and measuring/reporting, in each of the plurality of reserved resource sections, the channel state information of the non-licensed band on the basis of the result of sensing the carrier waves of an adjacent cell and whether a reserved resource section of the adjacent cell is established, wherein the reserved resource section of the serving cell is determined based on a type of the reserved resource section of the serving cell measuring the channel state information.

Claims

1. A method of reporting channel state information in an unlicensed band by a user equipment in a wireless communication system, the method comprising:

setting a plurality of reservation resource sections of a serving cell to measure the channel state information in the unlicensed band via a higher layer;

measuring the channel state information on the unlicensed band in each of a plurality of the reservation resource sections based on a carrier sensing result of a neighbor cell and information on whether the neighbor cell sets a reservation resource section; and

reporting the measured channel state information to the serving cell,

wherein if a reservation resource section of the serving cell for measuring the channel state information corresponds to a first type, the reservation resource section of the serving cell corresponds to a resource configured as a reservation resource section of the neighbor cell and

wherein if the reservation resource section of the serving cell for measuring the channel state information corresponds to a second type, the reservation resource section of the serving cell corresponds to a resource which is not configured as the reservation resource section of the neighbor cell.

2. The method of claim 1, wherein if the reservation resource section of the serving cell for measuring the channel state information corresponds to the first type, the measuring the channel state information on the unlicensed band comprises measuring the channel state information under an assumption that interference occurs due to a signal transmitted by the neighbor cell in the reservation resource section of the first type.

3. The method of claim 1, wherein if the reservation resource section of the serving cell for measuring the channel state information corresponds to the second type, the measuring the channel state information on the unlicensed band comprises measuring the channel state information under an assumption that interference occurs from a node adjacent to the neighbor cell, although there is no interference due to a signal transmitted by the neighbor cell in the reservation resource section of the second type.

4. The method of claim 1, wherein the plurality of the reservation resource sections correspond to sections determined as being in a channel idle state as a result of carrier sensing of the serving cell.

5. The method of claim 1, wherein the reservation resource section of the second type is in a channel idle state as a result of carrier sensing of the neighbor cell and corresponds to the resource which is not configured as a reservation resource section by the neighbor cell.

6. The method of claim 5, wherein if the reservation resource section of the serving cell for measuring the channel state information corresponds to a third type, the reservation resource section of the third type is in a channel busy state as a result of carrier sensing of the neighbor cell and corresponds to the resource which is not configured as a reservation resource section by the neighbor cell.

7. A user equipment in a wireless communication system, the user equipment comprising:

a wireless communication module configured to transceive a signal with a serving cell through a licensed band or an unlicensed band; and

a processor configured to process the signal, the processor configured to control the wireless communication module to measure channel state information on the unlicensed band in each of a plurality of reservation resource sections of the serving cell in the unlicensed band configured via a higher layer based on a carrier sensing result of a neighbor cell and information on whether the neighbor cell sets a reservation resource section and report the measured channel state information to the serving cell,

wherein if a reservation resource section of the serving cell for measuring the channel state information corresponds to a first type, the reservation resource section of the serving cell corresponds to a resource configured as a reservation resource section of the neighbor cell and

wherein if the reservation resource section of the serving cell for measuring the channel state information corresponds to a second type, the reservation resource section of the serving cell corresponds to a resource which is not configured as the reservation resource section of the neighbor cell.

8. The user equipment of claim 7, wherein if the reservation resource section of the serving cell for measuring the channel state information corresponds to the first type, the processor is configured to measure the channel state information under an assumption that interference occurs due to a signal transmitted by the neighbor cell in the reservation resource section of the first type.

9. The user equipment of claim 7, wherein if the reservation resource section of the serving cell for measuring the channel state information corresponds to the second type, the processor is configured to measure the channel state information under an assumption that interference occurs from a node adjacent to the neighbor cell, although there is no interference due to a signal transmitted by the neighbor cell in the reservation resource section of the second type.

10. The user equipment of claim 7, wherein the plurality of the reservation resource sections correspond to sections determined as being in a channel idle state as a result of carrier sensing of the serving cell.

11. The user equipment of claim 7, wherein the reservation resource section of the second type is in a channel idle state as a result of carrier sensing of the neighbor cell and corresponds to a resource which is not configured as a reservation resource section by the neighbor cell.

12. The user equipment of claim 11, wherein if the reservation resource section of the serving cell for measuring the channel state information corresponds to a third type, the reservation resource section of the third type is in a channel busy state as the result of carrier sensing of the neighbor cell and corresponds to the resource which is not configured as the reservation resource section by the neighbor cell.