UE signal to interference power ratio detection for network scheduling assistance
Embodiments disclosed herein relate to techniques for measuring and/or detecting a signal-to-interference ratio (SIR) of a received signal at a user equipment (UE). The received signal may include a desired signal, co-channel interference, adjacent channel interference, and an in-band blocker. The UE may filter (e.g., remove) the various interferences and in-band blocker. The UE may determine or measure a power (or Received Signal Strength Indicator (RSSI)) of the desired signal and a power (or RSSI) of the co-channel interference separately because the desired signal and the co-channel interference overlap in frequency. To do so, the UE may determine a total power of the received signal including the desired signal and co-channel interference. The UE may receive the desired signal again while an uplink transmission is deactivated (and thus without the interference). The UE may then calculate the SIR based on the total power and the power of the desired signal.
1. A method, comprising:
configuring, via processing circuitry of a base station, a frequency band combination for user equipment;
causing, via a transmitter of the base station, the user equipment to deactivate uplink transmission based on potential interference associated with the frequency band combination;
transmitting, via the transmitter, an indication of the frequency band combination to the user equipment;
causing, via the transmitter, the user equipment to determine a power of a test signal while the uplink transmission of the user equipment is deactivated;
receiving, via a receiver of the base station, an indication of a signal-to-interference ratio associated with the frequency band combination from the user equipment; and
scheduling the user equipment using the frequency band combination based on the signal-to-interference ratio.
2. The method of claim 1 , wherein the frequency band combination comprises an uplink frequency band, a downlink frequency band, or both.
3. The method of claim 1 , wherein the signal-to-interference ratio is based on uplink interference causing degradation on a downlink carrier.
4. The method of claim 1 , comprising determining, via the processing circuitry, whether the signal-to-interference ratio exceeds a threshold value.
5. The method of claim 4 , comprising increasing, via the processing circuitry, throughput or modulation order of transmissions associated with the frequency band combination, receptions associated with the frequency band combination, or both based on the signal-to-interference ratio exceeding the threshold value.
6. The method of claim 4 , performing, via the processing circuitry, one or more mitigation actions based on the signal-to-interference ratio not exceeding the threshold value.
7. The method of claim 6 , wherein the one or more mitigation actions comprise downgrading transmission data, downgrading reception data, or both by only scheduling a master cell group in a dual-connectivity combination, only scheduling a primary cell operation in a carrier aggregation combination, disabling secondary cell uplink transmission in a 2-uplink carrier aggregation combination, disabling secondary cell downlink reception, or any combination thereof.
8. The method of claim 1 , comprising transmitting, via the transmitter, a signal to the user equipment, the user equipment configured to determine the signal-to-interference ratio based on a power and a quality of the signal.
9. A base station, comprising:
a transmitter;
a receiver; and
processing circuitry coupled to the transmitter and the receiver, the processing circuitry configured to
establish a frequency band combination for user equipment,
cause, using the transmitter, the user equipment to deactivate uplink transmission based on potential interference with the frequency band combination,
transmit a test signal based on the frequency band combination, the test signal configured to cause the user equipment to determine a power of the test signal while the uplink transmission of the user equipment is deactivated,
cause, using the transmitter, the user equipment to determine a signal-to-interference ratio associated with the test signal, and
receive, via the receiver, an indication of the signal-to-interference ratio from the user equipment.
10. The base station of claim 9 , wherein the processing circuitry is configured to schedule, using the transmitter, the user equipment using the frequency band combination based on the signal-to-interference ratio.
11. The base station of claim 9 , wherein the processing circuitry is configured to perform a mitigation action based on the signal-to-interference ratio.
12. The base station of claim 11 , wherein the processing circuitry is configured to perform the mitigation action based on the signal-to-interference ratio failing to exceed a threshold value.
13. The base station of claim 9 , wherein the processing circuitry is configured to determine an interference type of the potential interference, the interference type comprising an intermodulation interference or a harmonic interference.
14. The base station of claim 9 , wherein the processing circuitry is configured to increase throughput or modulation order of transmissions associated with the frequency band combination, receptions associated with the frequency band combination, or both based on the signal-to-interference ratio.
15. The base station of claim 14 , wherein the processing circuitry is configured to increase the throughput or the modulation order of the transmissions, the receptions, or both based on the signal-to-interference ratio exceeding a threshold value.
16. One or more tangible, non-transitory, computer-readable media, storing instructions that cause one or more processors of a base station to:
configure a frequency band combination;
cause user equipment to activate uplink transmission based on potential interference associated with the frequency band combination;
send, via a transmitter, a signal-to-interference ratio estimation signal to the user equipment;
receive, from the user equipment, an indication of a signal-to-interference ratio associated with the frequency band combination based on the signal-to-interference ratio estimation signal; and
perform mitigation action based on the signal-to-interference ratio.
17. The one or more tangible, non-transitory, computer-readable media of claim 16 , wherein receiving the signal-to-interference ratio estimation signal causes the user equipment to determine the signal-to-interference ratio based on a power of a portion of the signal-to-interference ratio estimation signal corresponding to known symbols and interference power of the signal-to-interference ratio estimation signal corresponding to interference in the signal.
18. The one or more tangible, non-transitory, computer-readable media of claim 17 , wherein the signal-to-interference ratio is based on an interference associated with the signal-to-interference ratio estimation signal caused by uplink transmission.
19. The one or more tangible, non-transitory, computer-readable media of claim 16 , wherein the instructions that cause the one or more processors to perform the mitigation action comprise downgrading transmission data, downgrading reception data, or both by only scheduling a master cell group in a dual-connectivity combination, only scheduling a primary cell operation in a carrier aggregation combination, disabling secondary cell uplink transmission in a 2-uplink carrier aggregation combination, disabling secondary cell downlink reception, or any combination thereof.
20. The one or more tangible, non-transitory, computer-readable media of claim 16 , wherein the signal-to-interference ratio estimation signal is configured to mimic properties of a downlink signal.