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