Method and apparatus for reducing inter-cell interference in radio communication system
A method of a first cell for supporting a downlink channel demodulation at a user equipment, includes receiving, from a second cell, Multicast/Broadcast over Single Frequency Network (MBSFN) subframe configuration information for the second cell; and transmitting, by the first cell to the user equipment via a higher layer signaling, information on a Cell-specific Reference Signal (CRS) of the second cell including the MBSFN subframe configuration information of the second cell, wherein the information on the CRS of the second cell is used by the user equipment to mitigate the inter-cell interference from the CRS of the second cell.
1. A method of a first cell for supporting a downlink channel demodulation at a user equipment, the method comprising:
receiving, from a second cell, Multicast/Broadcast over Single Frequency Network (MBSFN) subframe configuration information for the second cell;
transmitting, by the first cell to the user equipment via a higher layer signaling, information on a Cell-specific Reference Signal (CRS) of the second cell including the MBSFN subframe configuration information of the second cell; and
wherein the information on the CRS of the second cell is used by the user equipment to mitigate an inter-cell interference from the CRS of the second cell.
2. The method of claim 1 , wherein the information on the CRS of the second cell further includes a number of CRS antenna ports of the second cell.
3. The method of claim 1 , wherein the MBSFN subframe configuration information indicates one or more subframes not containing the CRS in a data region.
4. The method of claim 1 , wherein the MBSFN subframe configuration information indicates one or more subframes containing the CRS only in a control region.
5. The method of claim 1 , further comprising:
transmitting, by the first cell to the user equipment, a downlink signal on the downlink channel,
wherein the information on the CRS of the second cell is used by the user equipment to demodulate the downlink channel from the first cell.
6. The method of claim 5 , wherein the downlink channel is a physical downlink shared channel (PDSCH) or a physical downlink control channel (PDCCH).
7. The method of claim 1 , wherein the first cell is a serving cell and the second cell is a neighbor cell.
8. A method of a user equipment for demodulating a downlink channel, the method comprising:
receiving, by the user equipment from a first cell via a higher layer signaling, information on a Cell-specific Reference Signal (CRS) of a second cell including Multicast/Broadcast over Single Frequency Network (MBSFN) subframe configuration information,
wherein the MBSFN subframe configuration information is MBSFN subframe configuration information for the second cell acquired by the first cell from the second cell; and
mitigating an inter-cell interference from the CRS of the second cell using information on the CRS of the second cell.
9. A base station of a first cell for supporting a downlink channel demodulation at a user equipment, the base station comprising:
a reception module;
a transmission module; and
a processor configured to:
receive Multicast/Broadcast over Single Frequency Network (MBSFN) subframe configuration information for a second cell from the second cell,
transmit, to the user equipment via a higher layer signaling, information on a Cell-specific Reference Signal (CRS) of the second cell including the MBSFN subframe configuration information of the second cell, and
wherein the information on the CRS of the second cell is used by the user equipment to mitigate an inter-cell interference from the CRS of the second cell.
10. A user equipment for demodulating a downlink channel, the user equipment comprising:
a reception module;
a transmission module; and
a processor configured to:
receive, from a first cell via a higher layer signaling, information on a Cell-specific Reference Signal (CRS) of a second cell including Multicast/Broadcast over Single Frequency Network (MBSFN) subframe configuration information,
wherein the MBSFN subframe configuration information is MBSFN subframe configuration information for the second cell acquired by the first cell from the second cell, and
mitigate an inter-cell interference from the CRS of the second cell using information on the CRS of the second cell.