Method for transceiving a signal, and base station and user equipment for same
The present invention relates to a method for mitigating inter-cell interference in a multi-cell DAS. In one embodiment of the present invention, user equipment estimates an interfering antenna of an adjacent cell on the basis of RS pattern information of the adjacent cell, provided by a base station of a serving cell, or the base station provides the user equipment with information which specifies an interfering cell of the adjacent cell.
1. A method for transmitting a signal by a base station of a certain cell, which includes a plurality of distributed antennas spaced apart from one another at least a predetermined distance, the method comprising the steps of:
transmitting, by the base station, first information to a user equipment within the certain cell, the first information informing the user equipment of a first antenna group having one or more antennas used for communication with the user equipment among the plurality of distributed antennas within the certain cell; and
transmitting, by the base station, second information to the user equipment, the second information informing the user equipment of a second antenna group having one or more antennas interfering with the user equipment among a plurality of distributed antennas within a neighboring cell of the certain cell,
wherein the second information includes information indicating a number of antennas belonging to the second antenna group.
2. The method according to claim 1 , wherein the second information includes information on a reference signal pattern of the neighboring cell.
3. The method according to claim 1 , wherein the second information further includes information an index for each of the one or more antennas belonging to the second antenna group.
4. The method according to claim 3 claim 1 , wherein the first information includes information indicating a number of antennas belonging to the first antenna group and information indicating an index for each of the one or more antennas belonging to the first antenna group.
5. A base station of a certain cell, which includes a plurality of distributed antennas spaced apart from one another at least a predetermined distance, the base station comprising:
a transmitter configured to transmit a signal; and
a processor configured to control the transmitter to transmit first information to a user equipment within the certain cell, the first information informing the user equipment of a first antenna group having one or more antennas used for communication with the user equipment among the plurality of distributed antennas within the certain cell and transmit second information to the user equipment, the second information informing the user equipment of a second antenna group having one or more antennas interfering with the user equipment among a plurality of distributed antennas within a neighboring cell of the certain cell,
wherein the second information includes information indicating a number of antennas belonging to the second antenna group.
6. The base station according to claim 5 , wherein the processor is configured to generate the second information, which includes information on a reference signal pattern of the neighboring cell, and provide the generated information to the transmitter.
7. The base station according to claim 5 , wherein the processor is configured to generate the second information, which includes information indicating an index for each of the one or more antennas belonging to the second antenna group.
8. The base station according to claim 5 , wherein the processor is configured to generate the first information, which includes information indicating a number of antennas belonging to the first antenna group and information indicating an index for each of the one or more antennas belonging to the first antenna group.
9. A method for receiving a signal in user equipment from a base station, which includes a plurality of distributed antennas spaced apart from one another at least a predetermined distance, the method comprising the steps of:
receiving, from the base station, first information informing the user equipment of a first antenna group having one or more antennas used for communication with the user equipment among the plurality of distributed antennas within the base station;
receiving, from the base station, second information informing the user equipment of a second antenna group having one or more antennas interfering with the user equipment among a plurality of distributed antennas within a neighboring base station of the base station; and
generating channel quality information on the basis of the first information and the second information,
wherein the second information includes information indicating a number of antennas belonging to the second antenna group.
10. The method according to claim 9 , wherein the second information includes information on a reference signal pattern of the neighboring base station.
11. The method according to claim 9 , wherein the second information includes information indicating an index for each of the one or more antennas belonging to the second antenna group.
12. The method according to claim 9 , wherein the first information includes information indicating a number of antennas belonging to the first antenna group and information indicating an index for each of the one or more antennas belonging to the first antenna group.
13. A user equipment receiving a signal from a base station of a certain cell, which includes a plurality of distributed antennas spaced apart from one another at least a predetermined distance, the user equipment comprising:
a receiver configured to receive the signal; and
a processor configured to control the receiver to receive, from the base station, first information informing the user equipment of a first antenna group having one or more antennas used for communication with the user equipment among the plurality of distributed antennas within the certain cell and receive second information informing the user equipment of a second antenna group having one or more antennas interfering with the user equipment among a plurality of distributed antennas within a neighboring cell of the certain cell, and configured to generate channel quality information on the basis of the first information and the second information,
wherein the second information includes information indicating a number of antennas belonging to the second antenna group.
14. The user equipment according to claim 13 , wherein the second information includes information on a reference signal pattern of the neighboring cell, and the processor is configured to acquire a reference signal of the neighboring cell on the basis of the reference signal pattern information of the neighboring cell.
15. The user equipment according to claim 13 , wherein the second information includes information indicating an index for each of the one or more antennas belonging to the second antenna group, and the processor is configured to calculate an interference signal from the second antenna group based on a reference signal of the neighboring cell and the second information.
16. The user equipment according to claim 13 , wherein the first information includes information indicating a number of antennas belonging to the first antenna group and information indicating an index for each of the one or more antennas belonging to the first antenna group.