Method for selecting an adaptive CoMP scheme
Disclosed is a method for selecting an adaptive CoMP scheme for a user equipment. The user equipment selects a first CoMP set which can maximize a signal to interference-plus-noise ratio (SINR) from among CoMP sets while performing a first coordinate multi-point (CoMP) scheme. Then, the user equipment compares the current data transmission rate thereof and the required minimum data transmission rate thereof and the required minimum data transmission rate while performing the first CoMP scheme and selecting the first CoMP set. Subsequently, the user equipment which performs the first CoMP scheme selects a second CoMP scheme on the basis of the result of the comparison in accordance with a predetermined sequence of CoMP schemes.
1. A method of adaptively selecting a coordinate multipoint (CoMP) scheme, at a user equipment (UE), in a system including a plurality of CoMP sets, each of the CoMP sets including at least two base stations, the method comprising:
comparing a current data rate of the UE with a minimum requirement data rate;
selecting a first CoMP scheme according to a predetermined order of CoMP schemes when the current data rate of the UE is less than the minimum requirement data rate;
selecting a first CoMP set which can maximize a signal to interference plus noise ratio (SINR) from among the plurality of CoMP sets while performing the first CoMP scheme;
comparing a current data rate of the UE with the minimum requirement data rate while performing the first CoMP scheme with the first CoMP set;
selecting a second CoMP scheme according to the predetermined order of CoMP schemes when the current data rate of the UE is less than the minimum requirement data rate,
wherein the first CoMP scheme corresponds to a coordinate-beamforming scheme, the second CoMP scheme corresponds to a coordinate-silencing scheme, and then a third CoMP scheme corresponds to a CoMP-joint processing scheme; and performing the second CoMP scheme to maximize the SINR when the first CoMP scheme does not provide the minimum requirement data rate.
2. The method of claim 1 , further comprising:
selecting a second CoMP set which can maximize the SINR from among the plurality of CoMP sets while performing the second CoMP scheme when the second CoMP scheme is not a final order of the CoMP schemes.
3. The method of claim 2 , wherein the UE silences a base station which causes much interference to the UE among the second CoMP set while operating in the coordinate-silencing scheme corresponding to the second CoMP scheme.
4. The method of claim 2 , wherein the UE selects a base station to be silenced from among the second CoMP set using a round robin scheme.
5. The method of claim 2 , wherein the UE selects a base station to be silenced using information regarding the number of times of silencing received through an indicator.
6. The method of claim 1 , wherein the UE silences a base station having highest throughput from among the second CoMP set based on throughput of the second CoMP set.
7. The method of claim 1 , wherein the current data rate of the UE is measured based on the SINR.
8. A user equipment (UE) for adaptively selecting a coordinate multipoint (CoMP) scheme in a system including a plurality of CoMP sets, each of the CoMP sets including at least two base stations, the UE comprising:
a radio frequency (RF) unit; and
a processor;
wherein the processor is configured to:
compare a current data rate of the UE with a minimum requirement data rate;
select a first CoMP scheme according to a predetermined order of CoMP schemes when the current data rate of the UE is less than the minimum requirement data rate;
select a first CoMP set which can maximize a signal to interference plus noise ratio (SINR) from among the plurality of CoMP sets while performing the first CoMP scheme;
compare a current data rate of the UE with the minimum requirement data rate while performing the first CoMP scheme with the first CoMP set;
select a second CoMP scheme according to the predetermined order of CoMP schemes when the current data rate of the UE is less than the minimum requirement data rate,
wherein the first CoMP scheme corresponds to a coordinate-beamforming scheme, the second CoMP scheme corresponds to a coordinate-silencing scheme, and then a third CoMP scheme corresponds to a CoMP-joint processing scheme; and performing the second CoMP scheme to maximize the SINR when the first CoMP scheme does not provide the minimum requirement data rate.
9. The UE of claim 8 , wherein the processor is further configured to select a second CoMP set which can maximize the SINR from among the plurality of CoMP sets while performing the second CoMP scheme when the second CoMP scheme is not a final order of the CoMP schemes.
10. The UE of claim 8 , wherein the processor is further configured to silence a base station which causes much interference to the UE among the second CoMP set while operating in the coordinate silencing scheme corresponding to the second CoMP scheme.