Dropping or scaling SRS signals based on frequency bands
View Patent ↗A wireless device receives configuration parameters of: one or more first cells in a first frequency band; and one or more second cells in a second frequency band. A calculated total transmit power for a plurality of signals is determined. The calculated total transmit power comprises a first SRS configured for transmission, during a time interval, via the one or more first cells. The calculated total transmit power comprises a second SRS configured for transmission, during the time interval, via the one or more second cells. A transmission of the first SRS is dropped or scaled, based on an SRS transmit power priority of the first SRS, when the calculated total transmit power exceeds a first value. The SRS transmit power priority is based on a frequency band of the one or more first cells.
1. A method comprising:
receiving, by a wireless device, configuration parameters of:
one or more first cells in a first frequency band; and
one or more second cells in a second frequency band;
determining a calculated total transmit power for a plurality of signals comprising:
a first sounding reference signal (SRS) configured for transmission, during a time interval, via the one or more first cells; and
a second SRS configured for transmission, during the time interval, via the one or more second cells; and
dropping a transmission of the first SRS or scaling a transmission power of the first SRS, based on an SRS transmit power priority of the first SRS, when the calculated total transmit power exceeds a first value, wherein the SRS transmit power priority is based on a frequency band of the one or more first cells.
2. The method of claim 1 , wherein:
the first frequency band is a licensed frequency band; and
the second frequency band is an unlicensed frequency band.
3. The method of claim 1 , wherein the first value is a maximum allowed transmission power of the wireless device.
4. The method of claim 1 , wherein:
the first SRS is of a first SRS type; and
the second SRS is of a second SRS type.
5. The method of claim 1 , further comprising transmitting, to a base station, a second message comprising one or more second parameters, the one or more second parameters indicating that the wireless device supports an enhanced SRS transmission procedure.
6. The method of claim 1 , further comprising transmitting, to a base station, a second message comprising one or more second parameters, the one or more second parameters indicating that the wireless device supports configuration of an uplink for a cell operating in an unlicensed frequency band.
7. The method of claim 1 , further comprising:
scaling the at least one of the first SRS or the second SRS by:1
adjusting a transmit power of the at least one of the first SRS or the second SRS; and
transmitting the at least one of the first SRS or the second SRS in the time interval.
8. The method of claim 1 , wherein:
the one or more first cells operate on the first frequency band based on a first radio access technology; and
the one or more second cells operate on the second frequency band based on a second radio access technology.
9. The method of claim 8 , wherein:
the first frequency band is a licensed frequency band; and
the second frequency band is an unlicensed frequency band.
10. The method of claim 8 , wherein:
the first SRS is of a first SRS type; and
the second SRS is of a second SRS type.
11. The method of claim 1 , wherein the SRS transmit power priority is further based on whether the first SRS or the second SRS is transmitted adjacent to a physical uplink shared channel (PUSCH) transport block.
12. The method of claim 11 , wherein:
the first frequency band is a licensed frequency band; and
the second frequency band is an unlicensed frequency band.
13. The method of claim 11 , wherein:
the first SRS is of a first SRS type; and
the second SRS is of a second SRS type.
14. The method of claim 11 , wherein:
the first SRS is transmitted according to a first sounding procedure; and
the second SRS is transmitted according to a second sounding procedure different from the first sounding procedure.
15. A system comprising:
a base station comprising:
one or more first processors; and
first memory storing first instructions that, when executed by the one or more first processors of the base station, cause the base station to transmit configuration parameters of:
one or more first cells in a first frequency band; and
one or more second cells in a second frequency band; and
a wireless device comprising:
one or more second processors; and
second memory storing second instructions that, when executed by the one or more second processors of the wireless device, cause the wireless device to:
receive the configuration parameters;
determine a calculated total transmit power for a plurality of signals comprising:
a first sounding reference signal (SRS) configured for transmission, during a time interval, via the one or more first cells; and
a second SRS configured for transmission, during the time interval, via the one or more second cells; and
drop a transmission of the first SRS or scaling a transmission power of the first SRS, based on an SRS transmit power priority of the first SRS, when the calculated total transmit power exceeds a first value, wherein the SRS transmit power priority is based on a frequency band of the one or more first cells.
16. The system of claim 15 , wherein:
the one or more first cells operate on the first frequency band based on a first radio access technology; and
the one or more second cells operate on the second frequency band based on a second radio access technology.
17. The system of claim 16 , wherein:
the first frequency band is a licensed frequency band; and
the second frequency band is an unlicensed frequency band.
18. A system comprising:
a wireless device; and
a base station;
wherein the base station is configured to transmit configuration parameters of:
one or more first cells in a first frequency band; and
one or more second cells in a second frequency band; and
wherein the wireless device is configured to:
receive the configuration parameters;
determine a calculated total transmit power for a plurality of signals comprising:
a first sounding reference signal (SRS) configured for transmission, during a time interval, via the one or more first cells; and
a second SRS configured for transmission, during the time interval, via the one or more second cells; and
drop a transmission of the first SRS or scaling a transmission power of the first SRS, based on an SRS transmit power priority of the first SRS, when the calculated total transmit power exceeds a first value, wherein the SRS transmit power priority is based on a frequency band of the one or more first cells.
19. The system of claim 18 , wherein the SRS transmit power priority is further based on whether the first SRS or the second SRS is transmitted adjacent to a physical uplink shared channel (PUSCH) transport block.
20. The system of claim 19 , wherein:
the first frequency band is a licensed frequency band; and
the second frequency band is an unlicensed frequency band.