Electronic device performing interference cancellation and operating method thereof
The present disclosure provides an operating method of an electronic device supporting dynamic spectrum sharing (DSS). The method includes performing a radio resource control (RRC) connection with a serving base station, receiving information for interference cancellation from the serving base station, receiving a cell-specific reference signal (CRS) from at least one adjacent base station that is different from the serving base station, and performing interference cancellation based on the CRS and the information for the interference cancellation.
1. An operating method of an electronic device supporting dynamic spectrum sharing (DSS), the operating method comprising:
performing a radio resource control (RRC) connection with a serving base station;
receiving information for interference cancellation from the serving base station, the information for interference cancellation comprising common cell information that is common to the serving base station and at least one adjacent base station;
receiving a cell-specific reference signal (CRS) directly from the at least one adjacent base station that is different from the serving base station; and
performing the interference cancellation based on the CRS and the information for the interference cancellation comprising the common cell information.
2. The operating method of claim 1 , wherein the information for the interference cancellation corresponds to individual cell information at least including a long term evolution (LTE) bandwidth, a number of CRS ports, multimedia broadcast signal frequency network (MBSFN) configuration information, and time division duplex (TDD) configuration information for the at least one adjacent base station.
3. The operating method claim 2 , wherein the performing of the interference cancellation includes:
identifying a transmission location of a CRS symbol received from the at least one adjacent base station, based on the individual cell information; and
performing interference cancellation based on the identified transmission location.
4. The operating method of claim 1 , wherein the information for the interference cancellation corresponds to common cell information at least including first information indicating a maximum long term evolution (LTE) bandwidth value allowed for the at least one adjacent base station, second information indicating whether to use a CRS port of the at least one adjacent base station, third information indicating whether pieces of multimedia broadcast signal frequency network (MBSFN) configuration information of the at least one adjacent base station are the same as each other, and fourth information indicating whether pieces of time division duplex (TDD) configuration information of the at least one adjacent base station are the same as each other.
5. The operating method of claim 4 , wherein the performing of the interference cancellation includes:
performing channel estimation for the CRS based on the common cell information; and
measuring a reception metric for the CRS.
6. The operating method of claim 5 , wherein the reception metric corresponds to one of reference signal received power (RSRP), a signal to interference noise ratio (SINR), a received signal strength index (RSSI), and a received signal received quality (RSRQ).
7. The operating method of claim 5 , further comprising:
comparing the measured reception metric with a threshold value; and
when the measured reception metric exceeds the threshold value, determining that a CRS symbol has been transmitted and performing interference cancellation on the CRS symbol.
8. The operating method of claim 7 , wherein, when the measured reception metric is less than the threshold value, determining that the CRS symbol has not been transmitted and bypassing the interference cancellation for the CRS symbol.
9. The operating method of claim 1 , wherein the serving base station supports both 5th generation new radio (5G NR) and long term evolution (LTE), and
the at least one adjacent base station supports LTE.
10. An electronic device comprising:
a communicator configured to receive information for interference cancellation from a serving base station simultaneously supporting 5G and long term evolution (LTE), the information for interference cancellation comprising common cell information that is common to the serving base station and at least one adjacent base station, and receive a cell-specific reference signal (CRS) directly from the at least one adjacent base station supporting LTE;
a storage configured to store predefined threshold value information; and
a controller configured to perform a radio resource control (RRC) connection with the serving base station and perform the interference cancellation based on the CRS and the information for the interference cancellation comprising the common cell information.
11. The electronic device of claim 10 , wherein the information for the interference cancellation corresponds to individual cell information at least including an LTE bandwidth, a number of CRS ports, multimedia broadcast signal frequency network (MBSFN) configuration information, and time division duplex (TDD) configuration information for the at least one adjacent base station.
12. The electronic device of claim 11 , wherein the controller is further configured to identify a transmission location of a CRS symbol received from the at least one adjacent base station, based on the individual cell information, and perform interference cancellation based on the identified transmission location.
13. The electronic device of claim 10 , wherein the common cell information includes at least first information indicating a maximum LTE bandwidth value allowed for the at least one adjacent base station, second information indicating whether to use a CRS port of the at least one adjacent base station, third information indicating whether pieces of multimedia broadcast signal frequency network (MBSFN) configuration information of the at least one adjacent base station are the same as each other, and fourth information indicating whether pieces of time division duplex (TDD) configuration information of the at least one adjacent base station are the same as each other.
14. The electronic device of claim 13 , wherein the controller is further configured to perform channel estimation for the CRS based on the common cell information and measure a reception metric for the CRS.
15. The electronic device of claim 14 , wherein the reception metric corresponds to one of reference signal received power (RSRP), a signal to interference noise ratio (SINR), a received signal strength index (RSSI), and a received signal received quality (RSRQ).
16. The electronic device of claim 14 , wherein the controller is further configured to compare the measured reception metric with a threshold value, and determine that a CRS symbol has been transmitted, when the measured reception metric exceeds the threshold value, and perform interference cancellation on the CRS symbol.
17. The electronic device of claim 16 , wherein, when the measured reception metric is less than the threshold value, the controller determines that the CRS symbol has not been transmitted, and bypasses interference cancellation for the CRS symbol.
18. A wireless communication system comprising:
a first base station configured to simultaneously support 5G and long term evolution (LTE) and transmit information for interference cancellation to an electronic device, the information for interference cancellation comprising common cell information that is common to the first base station and at least one adjacent base station;
the at least one adjacent base station configured to support LTE and broadcast a cell-specific reference signal (CRS) directly to the electronic device; and
the electronic device including a communicator configured to receive the information for the interference cancellation and the CRS, a storage configured to store predefined threshold value information, and a controller configured to perform a radio resource control (RRC) connection with the first base station and perform interference cancellation based on the CRS and the information for the interference cancellation comprising the common cell information.
19. The wireless communication system of claim 18 , wherein the information for the interference cancellation corresponds to individual cell information at least including an LTE bandwidth, a number of CRS ports, multimedia broadcast signal frequency network (MBSFN) configuration information, and time division duplex (TDD) configuration information for the at least one adjacent base station, and
the controller is further configured to identify a transmission location of a CRS symbol received from the at least one adjacent base station, based on the individual cell information, and perform interference cancellation based on the identified transmission location.
20. The wireless communication system of claim 18 , wherein the common cell information includes at least first information indicating a maximum LTE bandwidth value allowed for the at least one adjacent base station, second information indicating whether to use a CRS port of the at least one adjacent base station, third information indicating whether pieces of multimedia broadcast signal frequency network (MBSFN) configuration information of the at least one adjacent base station are the same as each other, and fourth information indicating whether pieces of time division duplex (TDD) configuration information of the at least one adjacent base station are the same as each other, and
the controller is further configured to perform channel estimation for the CRS based on the common cell information, measure a reception metric for the CRS, compare the measured reception metric with a threshold value, determine that a CRS symbol has been transmitted, when the measured reception metric exceeds the threshold value, perform interference cancellation on the CRS symbol, determine that the CRS symbol has not been transmitted, when the measured reception metric is less than the threshold value, and bypass interference cancellation for the CRS symbol.