Method and apparatus for transmitting information for reporting in wireless communication system

• US 9,801,087 B2
• Filed: 03/05/2013
• Issued: 10/24/2017
• Est. Priority Date: 03/08/2012
• Status: Active Grant

• Current Assignee: LG Electronics, Inc. (LG Corporation)
• Original Assignee: LG Electronics, Inc. (LG Corporation)
• Inventors: Kim, Kijun, Seo, Hanbyul, Kim, Byounghoon
• Primary Examiner(s): Kizou, Hassan
• Assistant Examiner(s): Belur, Deepa
• Application Number:
  US14/383,435
• Publication Number:
  US 20150043368A1
• Time in Patent Office: 1,694 Days
• Field of Search: None
• CPC Class Codes: H04B 17/00 Monitoring; Testing of line transmission systems H04B3/46; arrangements for monitoring or testing transmission systems employing electromagnetic waves other than radio waves H04B10/07
• CPC Class Codes: H04B 17/309 Measuring or estimating channel quality parameters
• CPC Class Codes: H04B 17/318 Received signal strength
• CPC Class Codes: H04B 17/327 Received signal code power [RSCP]
• CPC Class Codes: H04B 17/382 for resource allocation, admission control or handover
• CPC Class Codes: H04B 7/024 Co-operative use of antennas of several sites, e.g. in co-ordinated multipoint or co-operative multiple-input multiple-output [MIMO] systems
• CPC Class Codes: H04B 7/0417 Feedback systems
• CPC Class Codes: H04B 7/0639 Using selective indices, e.g. of a codebook, e.g. pre-distortion matrix index [PMI] or for beam selection
• CPC Class Codes: H04L 5/0053 Allocation of signaling, i.e. of overhead other than pilot signals
• CPC Class Codes: H04W 24/10 Scheduling measurement reports ; Arrangements for measurement reports
• CPC Class Codes: H04W 52/325 Power control of control or pilot channels

Abstract

One embodiment of the present invention relates to a method for a serving cell transmitting information for reporting a terminal measurement and/or reporting channel state information in a wireless communication system, and more specifically, to a method for transmitting information comprising a step of transmitting information to the terminal the measurement report and/or the channel state information report, wherein the information includes a plurality of channel state information-reference signal (CSI-RS) settings, wherein each of the plurality of CSI-RS settings includes information related to a bandwidth from which the CSI-RS is transmitted according to the relevant CSI-RS setting.

Claims

1. A method for transmitting information for at least one of measurement reporting and channel state information (CSI) reporting of a user equipment (UE) by a serving cell performing coordinated multipoint (CoMP) transmission with heterogeneous bandwidths in a wireless communication system, the method comprising:

transmitting, to the UE, the information for CSI reporting comprising information on a CSI-reference signal (CSI-RS) transmission bandwidth; and

receiving CSI for each sub-band determined based on a sub-band size;

wherein the sub-band size is determined based on the CSI-RS transmission bandwidth,

wherein the information for the CSI reporting comprises a CSI-RS configuration,

wherein the CSI-RS configuration comprises the information on the CSI-RS transmission bandwidth, and

wherein the CSI-RS transmission bandwidth corresponds to a common bandwidth in which a bandwidth for each of the serving cell and a cooperating cell having different transmission center frequencies or different transmission bandwidths to transmit CSI-RS is overlapped.

2. The method according to claim 1, wherein the information on the CSI-RS transmission bandwidth comprises a number of resource blocks.

3. The method according to claim 1, wherein the CSI-RS transmission bandwidth is identical to a bandwidth used by a cell associated with the CSI-RS.

4. The method according to claim 1, wherein the CSI-RS configuration is for designating at least one of a CoMP management set and a CoMP measurement set.

5. The method according to claim 1, wherein, when the serving cell transmits a zero power CSI-RS for the cooperating cell, the zero power CSI-RS is transmitted in a bandwidth corresponding to the CSI-RS transmission bandwidth of the cooperating cell.

6. The method according to claim 5, wherein the serving cell considers a zero power CSI-RS configuration only when data mapping is performed in a bandwidth corresponding to the CSI-RS transmission bandwidth of the cooperating cell.

7. A method for reporting channel state information (CSI) to a serving cell performing coordinated multipoint (CoMP) transmission with heterogeneous bandwidths by a user equipment (UE) in a wireless communication system, the method comprising:

receiving, from the serving cell, information for the CSI reporting comprising information on a CSI-reference signal (CSI-RS) transmission bandwidth;

determining a sub-band size based on the CSI-RS transmission bandwidth; and

reporting CSI for each sub-band determined based on the sub-band size,

wherein the information for the CSI reporting comprises a CSI-RS configuration,

wherein the CSI-RS configuration comprises the information on the CSI-RS transmission bandwidth, and

wherein the CSI-RS transmission bandwidth corresponds to a common bandwidth in which a bandwidth for each of the serving cell and a cooperating cell having different transmission center frequencies or different transmission bandwidths to transmit CSI-RS is overlapped.

8. The method according to claim 7, wherein the sub-band size determined based on the CSI-RS transmission bandwidth is applied to a bandwidth related to at least one CSI-RS to report the CSI.

9. The method according to claim 8, wherein, when there are two or more CSI-RS configurations to report the CSI, the UE reports sub-bands corresponding to each other in bandwidths corresponding to the two or more CSI-RS configurations.

10. The method according to claim 7, wherein the information related to the CSI-RS transmission bandwidth comprises a number of resource blocks.

11. The method according to claim 7, wherein the CSI-RS transmission bandwidth is identical to a bandwidth used by a cell associated with the CSI-RS.

12. The method according to claim 7, wherein the CSI-RS configuration is for designating at least one of a CoMP management set and a CoMP measurement set.

13. A base station for performing coordinated multipoint (CoMP) transmission with heterogeneous bandwidths in a wireless communication system, the base station comprising:

a transmit module; and

a processor configured to;

transmit, via the transmit module, information for channel state information (CSI) reporting comprising information on a CSI-reference signal (CSI-RS) transmission bandwidth to a user equipment (UE), and

receive, via the transmit module, CSI for each sub-band determined based on a sub-band size,

wherein the sub-band size is determined based on the CSI-RS transmission bandwidth,

wherein the information for the CSI reporting comprises a CSI-RS configuration,

wherein the CSI-RS configuration comprises the information on the CSI-RS transmission bandwidth, and

wherein the CSI-RS transmission bandwidth corresponds to a common bandwidth in which a bandwidth for each of the serving cell and a cooperating cell having different transmission center frequencies or different transmission bandwidths to transmit CSI-RS is overlapped.

14. A user equipment (UE) for reporting channel state information (CSI) to a serving cell performing coordinated multipoint (CoMP) transmission with heterogeneous bandwidths in a wireless communication system, the UE comprising:

a receive module;

a transmit module; and

a processor configured to;

receive, via the receive module, information for the CSI reporting comprising information on a CSI-reference signal (CSI-RS) transmission bandwidth from the serving cell,

determine a sub-band size based on the CSI-RS transmission bandwidth, and

report, via the transmit module, CSI for each sub-band determined based on the sub-band size,

wherein the information for channel state information reporting comprises a channel state information-reference signal (CSI-RS) configuration,

wherein the CSI-RS configuration comprises the information on the bandwidth for transmission of a CSI-RS transmission bandwidth, and

wherein the CSI-RS transmission bandwidth corresponds to a common bandwidth in which a bandwidth for each of the serving cell and a cooperating cell having different transmission center frequencies or different transmission bandwidths to transmit CSI-RS is overlapped.