Antenna optimization method in multiple connection environment and electronic device using same

1. An electronic device comprising:

at least one antenna configured to transmit and receive a wireless signal;

a tuner;

at least one processor; and

at least one memory,

wherein the at least one memory stores instructions, when executed by the at least one processor, causing the electronic device to:

determine whether multiple frequency band connections are configured,

identify a frequency band to transmit control information among the connected multiple frequency bands, when the multiple frequency band connections are configured, based on a result of determination,

acquire communication state information of the identified frequency band for transmitting the control information,

determine an antenna mode, based on the acquired communication state information, and

configure the at least one antenna, based on the determined antenna mode,

wherein the antenna mode includes:

a first mode in which the tuner is set based on return losses of the multiple frequency bands, and a second mode in which the tuner is set based on return losses of frequency bands among the multiple frequency bands to which the control information is transmitted, and

wherein in the second mode, a return loss of the frequency band over which the control information is transmitted is reduced compared to the first mode.

2. The electronic device of claim 1 , wherein the instructions further cause the at least one processor to determine whether to change the antenna mode using different transition conditions depending on whether a transmitted packet is a voice packet or a data packet.

3. The electronic device of claim 2 , wherein the instructions further cause the at least one processor to:

be transitioned to an optimal mode according to a first transition condition when the transmitted packet is the voice packet and the antenna mode is a normal mode,

be transitioned to the normal mode according to a second transition condition when the transmitted packet is the voice packet and the antenna mode is the optimal mode,

be transitioned to the optimal mode according to a third transition condition when the transmitted packet is the data packet and the antenna mode is the normal mode,

be transitioned to the normal mode according to a fourth transition condition when the transmitted packet is the data packet and the antenna mode is the optimal mode, and

provide hysteresis by differently configuring the first transition condition and the second transition condition and differently configuring the third transition condition and the fourth transition condition.

4. The electronic device of claim 3 , wherein each of the transition conditions is based on at least one of a reception quality of a downlink signal, transmission power used in signal transmission, a buffer status report (BSR) index indicating an amount of data to be transmitted, a block error rate (BLER) indicating a rate of packets which have not yet been transmitted among transmitted packets, or information on whether transmit time interval bundling (TTIB) for transmitting an identical packet multiple times through a plurality of resources is activated.

5. The electronic device of claim 4 ,

wherein the first transition condition includes at least one of a case in which reference signal received power (RSRP) is equal to or smaller than −110 dBm, a case in which transmission power is larger than 20 dBm, a case in which the BSR index is larger than or equal to 40% for 2 seconds, a case in which the BLER is larger than 10%, or a case of the TTIB is activated, and

wherein the second transition condition includes a case in which the BLER is smaller than 10%.

6. The electronic device of claim 4 ,

wherein the third transition condition includes at least one of a case in which reference signal received power (RSRP) is equal to or smaller than −80 dBm, a case in which transmission power is larger than 20 dBm, a case in which the BSR index is larger than or equal to 30% for 3 seconds, a case in which the BLER is larger than 30%, or a case in which the TTIB is activated, and

wherein the fourth transition condition includes a case in which the BLER is smaller than 30%.

7. The electronic device of claim 1 , wherein the instructions further cause the at least one processor to, when a number of identified frequency bands for transmitting control information is two or more, make return loss small in frequency bands including the two or more frequency bands or select one frequency band from among the two or more frequency bands and make return loss of the selected frequency band small as an optimal mode.

8. The electronic device of claim 1 , wherein the instructions further cause the at least one processor to, even when the determined antenna mode is an optimal mode, configure the at least one antenna according to a normal mode in a time interval in which the control information is not transmitted and configure the at least one antenna according to the optimal mode in a time interval in which the control information is transmitted.

9. A method of operating an electronic device, the method comprising:

determining whether multiple frequency band connections are configured;

identifying a frequency band to transmit control information among the connected multiple frequency bands when the multiple frequency band connections are configured;

acquiring communication state information of the identified frequency band to transmit the control information;

determining an antenna mode, based on the acquired communication state information; and

configuring at least one antenna, based on the determined antenna mode,

wherein the antenna mode includes:

a first mode in which tuner is set based on return losses of the multiple frequency bands, and a second mode in which the tuner is set based on return losses of frequency bands among the multiple frequency bands to which the control information is transmitted, and

wherein in the second mode, a return loss of the frequency band over which the control information is transmitted is reduced compared to the first mode.

10. The method of claim 9 , wherein determining whether the antenna mode is changed comprises determining whether the antenna mode is changed by using different transition conditions depending on whether a transmitted packet is a voice packet or a data packet.

11. The method of claim 10 , wherein determining whether to change the antenna mode includes:

transitioning to an optimal mode according to a first transition condition when the transmitted packet is the voice packet and the antenna mode is a normal mode,

transitioning to the normal mode according to a second transition condition when the transmitted packet is the voice packet and the antenna mode is the optimal mode,

transitioning to the optimal mode according to a third transition condition when the transmitted packet is the data packet and the antenna mode is the normal mode, and

transitioning to the normal mode according to a fourth transition condition when the transmitted packet is the data packet and the antenna mode is the optimal mode, and

providing hysteresis by differently configuring the first transition condition and the second transition condition and differently configuring the third transition condition and the fourth transition condition.

12. The method of claim 11 , wherein each of transition conditions are based on at least one of a reception quality of a downlink signal, transmission power used in signal transmission, a buffer status report (BSR) index indicating an amount of data to be transmitted, a block error rate (BLER) indicating a rate of packets which have not yet been transmitted among transmitted packets, or information on whether transmit time interval bundling (TTIB) for transmitting an identical packet multiple times through a plurality of resources is activated.

13. The method of claim 12 , wherein the first transition condition includes at least one of a case in which reference signal received power (RSRP) is equal to or smaller than −110 dBm, a case in which transmission power is larger than 20 dBm, a case in which the BSR index is larger than or equal to 40% for 2 seconds, a case in which the BLER is larger than 10%, or a case of the TTIB is activated, and

wherein the second transition condition includes a case in which the BLER is smaller than 10%.

14. The method of claim 12 , wherein the third transition condition includes at least one of a case in which reference signal received power (RSRP) is equal to or smaller than −80 dBm, a case in which transmission power is larger than 20 dBm, a case in which the BSR index is larger than or equal to 30% for 3 seconds, a case in which the BLER is larger than 30%, or a case in which the TTIB is activated, and

wherein the fourth transition condition includes a case in which the BLER is smaller than 30%.

15. The method of claim 9 , wherein, when a number of identified frequency bands to transmit control information is two or more, an optimal mode makes return loss small in frequency bands including the two or more frequency bands or selects one frequency band from among the two or more frequency bands and makes return loss of the selected frequency band small.

16. The method of claim 9 , wherein, even when the determined antenna mode is an optimal mode, the method further includes configuring the antenna according to a normal mode in a time interval in which the control information is not transmitted and configuring the antenna according to the optimal mode in a time interval in which the control information is transmitted.