Method and apparatus for transmitting control information to remove and suppress interference in wireless communication system
A communication method and an apparatus for transferring interference-related control information in order to enhance reception performance of a user terminal that receives downlink signals in a cellular mobile communication system based on a long term evolution-advanced (LTE-A) system are provided. The method includes receiving transmission parameters of interference, which include information on a resource by which interference data is not transmitted, performing blind detection using the information on a resource by which interference data is not transmitted, performing error correction encoding using the transmission parameters of the interference and the blind detection result, and decoding the received data.
1. A communication method of a user terminal, the method comprising:
receiving, from a serving base station, at least one first interference parameters associated with a neighbor base station;
receiving, from the serving base station, information on a candidate group of available values for at least one second interference parameters associated with the neighbor base station;
performing blind detection of the at least one second interference parameters based on the information on the candidate group;
receiving, from the serving base station, downlink data; and
decoding the downlink data based on the at least one first interference parameters and the at least one second interference parameters.
2. The method of claim 1 , wherein the decoding of the downlink data comprises performing error correction encoding based on the at least one first interference parameters and the at least one second interference parameters.
3. The method of claim 1 , further comprising:
calculating a conditional probability density function reflecting statistical characteristics of an interference signal based on the at least one first interference parameters and the at least one second interference parameters.
4. The method of claim 1 , wherein the at least one first interference parameters include at least one of a cell identifier of the neighbor cell, a number of cell specific reference signal (CRS) antenna ports of the neighbor cell and multicast/broadcast over single frequency network (MBSFN) subframe information on the neighbor cell.
5. The method of claim 1 , wherein the at least one second interference parameters include a transmission mode of the neighbor cell.
6. A communication method of a base station, the method comprising:
transmitting, to a user terminal, at least one first interference parameters associated with a neighbor base station;
transmitting, to the user terminal, information on a candidate group of available values for at least one second interference parameters associated with the neighbor base station; and
transmitting, to the user terminal, downlink data,
wherein the at least one second interference parameters are detected by the user terminal among the available values using blind detection, and
wherein the downlink data is decoded by the user terminal based on the at least one first interference parameters and the at least one second interference parameters.
7. The method of claim 6 , wherein the at least one first interference parameters include at least one of a cell identifier of the neighbor cell, a number of cell specific reference signal (CRS) antenna ports of the neighbor cell and multicast/broadcast over single frequency network (MBSFN) subframe information on the neighbor cell.
8. The method of claim 6 , wherein the at least one second interference parameters include a transmission mode of the neighbor cell.
9. A user terminal of a mobile communication system, the user terminal comprising:
a transmitter configured to transmit signals to a serving base station;
a receiver configured to receive signals from the serving base station; and
a controller configured to:
control the receiver to receive, from the serving base station, at least one first interference parameters associated with a neighbor base station,
control the receiver to receive, from the serving base station, information on a candidate group of available values for at least one second interference parameters associated with the neighbor base station,
perform blind detection of the at least one second interference parameters based on the information on the candidate group,
control the receiver to receive, from the serving base station, downlink data, and
decode the downlink data based on the at least one first interference parameters and the at least one second interference parameters.
10. The user terminal of claim 9 , wherein the controller is further configured to perform error correction encoding based on the at least one first interference parameters and the at least one second interference parameters.
11. The user terminal of claim 9 , wherein the controller is further configured to calculate a conditional probability density function reflecting statistical characteristics of an interference signal based on the at least one first interference parameters and the at least one second interference parameters.
12. The user terminal of claim 9 , wherein the at least one first interference parameters include at least one of a cell identifier of the neighbor cell, a number of cell specific reference signal (CRS) antenna ports of the neighbor cell and multicast/broadcast over single frequency network (MBSFN) subframe information on the neighbor cell.
13. The user terminal of claim 9 , wherein the at least one second interference parameters include a transmission mode of the neighbor cell.
14. A base station of a mobile communication system, the base station comprising:
a transmitter configured to transmit signals to a user terminal;
a receiver configured to receive signals from the user terminal; and
a controller configured to:
control the transmitter to transmit, to the user terminal, at least one first interference parameters associated with a neighbor base station,
control the transmitter to transmit, to the user terminal, information on a candidate group of available values for at least one second interference parameters associated with the neighbor base station, and
control the transmitter to transmit, to the user terminal, downlink data,
wherein the at least one second interference parameters are detected by the user terminal among the available values using blind detection, and
wherein the downlink data is decoded by the user terminal based on the at least one first interference parameters and the at least one second interference parameters.
15. The base station of claim 14 , wherein the at least one first interference parameters include at least one of a cell identifier of the neighbor cell, a number of cell specific reference signal (CRS) antenna ports of the neighbor cell and multicast/broadcast over single frequency network (MBSFN) subframe information on the neighbor cell.
16. The base station of claim 14 , wherein the at least one second interference parameters include a transmission mode of the neighbor cell.