Uplink transmission power control in a wireless device and wireless network
View Patent ↗A wireless device receives from a base station one or more messages comprising configuration parameters of a plurality of cells. The plurality of cells comprising one or more first cells of a first type and one or more second cells of a second type. The wireless device determines one or more transmission powers. The wireless device transmits, via one or more cells, one or more signals employing the one or more transmission powers.
1. A method comprising:
receiving, by a wireless device, one or more messages comprising configuration parameters of a plurality of cells;
determining a total transmission power for transmission of uplink signals in a subframe of a plurality of subframes and via the plurality of cells;
determining, employing a transmit power scaling factor, a transmission power value of an uplink signal of the uplink signals in response to the total transmission power exceeding a first value so that an updated total transmission power does not exceed the first value, wherein:
an uplink transmission burst transmitted during the plurality of subframes comprises the uplink signal; and
the transmit power scaling factor of the uplink signal depends on a subframe position of the subframe in the plurality of subframes of the uplink transmission burst; and
transmitting the uplink signal in the subframe and with the transmission power value.
2. The method of claim 1 , wherein the plurality of cells comprise a plurality of unlicensed cells.
3. The method of claim 1 , wherein the one or more messages further comprise the first value.
4. The method of claim 1 , wherein the uplink signal comprises at least one of:
an uplink shared channel signal; or
an uplink sounding reference signal.
5. The method of claim 1 , further comprising receiving downlink control information indicating resource assignments for transmission of the uplink transmission burst.
6. The method of claim 5 , wherein the downlink control information comprises:
a resource assignment field indicating resource blocks in the plurality of subframes of the uplink transmission burst; and
a transmit power control field indicating a power control value for determining the transmission power value of the uplink signal.
7. The method of claim 5 , wherein the downlink control information comprises a field indicating a number of subframes in the plurality of subframes of the uplink transmission burst.
8. The method of claim 5 , wherein the downlink control information comprises one or more fields indicating transmission parameters of the uplink signal.
9. The method of claim 1 , wherein based on whether the subframe position is the earliest subframe of the plurality of subframes of the uplink transmission burst, the transmit power scaling factor is determined.
10. The method of claim 1 , further comprising performing a listen before talk procedure prior to a transmission of the uplink transmission burst.
11. A wireless device comprising:
one or more processors; and
memory storing instructions that, when executed by the one or more processors, cause the wireless device to:
receive one or more messages comprising configuration parameters of a plurality of cells;
determine a total transmission power for transmission of uplink signals in a subframe of a plurality of subframes and via the plurality of cells; and
determine, employing a transmit power scaling factor, a transmission power value of an uplink signal of the uplink signals in response to the total transmission power exceeding a first value so that an updated total transmission power does not exceed the first value, wherein:
an uplink transmission burst transmitted during the plurality of subframes comprises the uplink signal; and
the transmit power scaling factor of the uplink signal depends on a subframe position of the subframe in the plurality of subframes of the uplink transmission burst; and
transmit the uplink signal in the subframe and with the transmission power value.
12. The wireless device of claim 11 , wherein the plurality of cells comprise a plurality of unlicensed cells.
13. The wireless device of claim 11 , wherein the one or more messages comprise the first value.
14. The wireless device of claim 11 , wherein the uplink signal comprises at least one of:
an uplink shared channel signal; or
an uplink sounding reference signal.
15. The wireless device of claim 11 , further comprising receiving downlink control information indicating resource assignments for transmission of the uplink transmission burst.
16. The wireless device of claim 15 , wherein the downlink control information comprises:
a resource assignment field indicating resource blocks in the plurality of subframes of the uplink transmission burst; and
a transmit power control field indicating a power control value for determining the transmission power value of the uplink signal.
17. The wireless device of claim 15 , wherein the downlink control information comprises a field indicating a number of subframes in the plurality of subframes of the uplink transmission burst.
18. The wireless device of claim 15 , wherein the downlink control information comprises one or more fields indicating transmission parameters of the uplink signal.
19. The wireless device of claim 11 , wherein based on whether the subframe position is the earliest subframe of the plurality of subframes of the uplink transmission burst, the transmit power scaling factor is determined.
20. The wireless device of claim 11 , further comprising performing a listen before talk procedure prior to a transmission of the uplink transmission burst.