Method and apparatus for selecting reception antenna set of user terminal

1. An electronic device, comprising:

a plurality of antennas including a first main antenna configured to transmit or receive a signal of a first frequency band, a first sub-antenna configured to receive the signal of the first frequency band, a second main antenna, and a second sub-antenna;

a radio frequency (RF) circuit configured to electrically connect with the plurality of antennas; and

a processor configured to:

control the RF circuit to operate in a first mode to receive the signal of the first frequency band using the first main antenna and the first sub-antenna;

determine a signal state based on a parameter indicating signal strength or signal quality; and

control the RF circuit to operate in a second mode to receive the signal of the first frequency band using the first main antenna, the first sub-antenna, the second main antenna, and the second sub-antenna based on the determined signal state.

2. The electronic device of claim 1 , wherein the second main antenna is configured to transmit or receive a signal of a second frequency band, and

wherein the second sub-antenna is configured to receive the signal of the second frequency band.

3. The electronic device of claim 1 , wherein the first main antenna and the second main antenna are located at a lower end of the electronic device, and

wherein the first sub-antenna and the second sub-antenna are located at an upper end of the electronic device.

4. The electronic device of claim 1 , wherein the parameter corresponds to at least one of a reference signal received power (RSRP), an energy to interference ratio (ECIO), a reference signal received quality (RSRQ), or a signal to interference plus noise ratio (SINR).

5. The electronic device of claim 1 , wherein the processor is configured to:

operate the RF circuit in a second mode, if a rate of data to be received during a unit time is greater than a first threshold value.

6. The electronic device of claim 5 , wherein the processor is configured to:

operate the RF circuit in the second mode, if the signal state is a first signal state and if the rate is greater than the first threshold value; and

operate the RF circuit in the second mode, if the signal state is a second signal state and if the rate is greater than a second threshold value.

7. The electronic device of claim 6 , wherein the processor is configured to:

operate the RF circuit in the first mode, if the signal state is the first signal state and if the rate is less than a third threshold value.

8. The electronic device of claim 7 , wherein the third threshold value is set to be less than the second threshold value.

9. The electronic device of claim 6 , wherein the processor is configured to:

operate the RF circuit in the first mode, if the signal state is the second signal state and if the rate corresponds to “0”.

10. The electronic device of claim 5 , wherein the processor is configured to:

determine the rate based on control information included in a subframe received during the unit time.

11. The electronic device of claim 10 , wherein the control information corresponds to downlink control information (DCI) included in a physical downlink control channel (PDCCH).

12. The electronic device of claim 1 , whether the processor is configured to:

operate the RF circuit in the second mode based on the signal state and whether a voice over long term evolution (VoLTE) function is used.

13. The electronic device of claim 1 , whether the processor is configured to:

control the RF circuit to operate in the second mode based on a discontinuous reception (DRX) period, if the electronic device is in a radio resource control (RRC) idle state.

14. An antenna operation method of an electronic device having a plurality of antennas, the method comprising:

determining a signal state based on a parameter indicating signal strength or signal quality;

determining a radio resource control (RRC) state of the electronic device for a base station; and

determining, based on the signal state and the RRC state, a set of antennas from among the plurality of antennas to be used to receive a signal, the determined set of antennas comprising two or four of the plurality of antennas.

15. The method of claim 14 , further comprising:

determining whether the electronic device executes a VoLTE function, if the RRC state is an RRC connected state and if the signal state is a first signal state; and

receiving a signal using four of the plurality of antennas, if it is determined that the electronic device executes the VoLTE function.

16. The method of claim 15 , further comprising:

determining whether a rate of data to be received during a unit time is greater than a first threshold value, if it is determined that the electronic device does not execute the VoLTE function; and

receiving a signal using the four of the plurality of antennas, if the rate is greater than the first threshold value.

17. The method of claim 16 , further comprising:

receiving a signal using two of the plurality of antennas, if the rate of the data to be received during the unit time is zero.

18. The method of claim 14 , further comprising:

determining whether a rate of data to be received during a unit time is greater than a first threshold value, if the RRC state is an RRC connected state and if the signal state is a second signal state;

receiving a signal using four of the plurality of antennas, if the rate is greater than the first threshold value; and

receiving a signal using two of the plurality of antennas, if the rate is less than a second threshold value.

19. The method of claim 18 , further comprising:

determining signal quality of a signal received using the four antennas,

wherein the receiving of the signal using the two antennas comprises:

selecting the two antennas based on a result of determining the signal quality; and

receiving the signal using the selected two antennas.

20. An electronic device, comprising:

a first antenna configured to transmit or receive a signal of a first frequency band;

a plurality of antennas configured to receive the signal of the first frequency band;

an RF circuit configured to electrically connect with the first antenna and the plurality of antennas; and

a processor configured to:

electrically connect with the RF circuit;

control the RF circuit in a first mode to receive the signal of the first frequency band using a first number of antennas among the first antenna and the plurality of antennas; and

control the RF circuit to operate in a second mode to receive the signal of the first frequency band using a second number of antennas among the first antenna and the plurality of antennas, based on at least a signal state determined based on a value of a parameter indicating signal strength or signal quality.