Initializing uplink power in a wireless network
A wireless device transmits first control information, via a secondary physical uplink control channel (PUCCH) of a secondary cell, with a first transmit power computed based on an adjustment factor. The wireless device receives a power control command of the secondary PUCCH and ignores the power control command by not applying the power control command to the adjustment factor in response to a time alignment timer of a timing advance group comprising the secondary cell not running. The wireless device transmits second control information on the secondary PUCCH with a second transmit power computed based on the adjustment factor initialized to a first value.
1. A method comprising:
transmitting, by a wireless device, first control information, via a secondary physical uplink control channel (PUCCH) of a secondary cell, with a first transmit power computed based on an adjustment factor;
receiving a power control command of the secondary PUCCH;
ignoring the power control command by not applying the power control command to the adjustment factor in response to a time alignment timer of a timing advance group comprising the secondary cell not running;
initializing the adjustment factor to a first value; and
transmitting second control information on the secondary PUCCH with a second transmit power computed based on the initialized adjustment factor.
2. The method of claim 1 , further comprising receiving at least one message comprising configuration parameters of a plurality of cells grouped into a plurality of PUCCH groups, the plurality of PUCCH groups comprising:
a primary PUCCH group comprising a primary cell with a primary PUCCH transmitted to a base station; and
a secondary PUCCH group comprising the secondary cell with the secondary PUCCH transmitted to the base station.
3. The method of claim 2 , wherein the at least one message further comprises random access resource parameters of the PUCCH secondary cell.
4. The method of claim 2 , wherein the at least one message further comprises a pathloss reference parameter indicating a pathloss reference cell for the PUCCH secondary cell.
5. The method of claim 1 , wherein the first value is received in a random access response received on a primary cell.
6. The method of claim 5 , wherein the first control information is transmitted after receiving the random access response.
7. The method of claim 1 , further comprising computing the first transmit power employing one or more second PUCCH power control information elements indicating a power parameter value of at least one PUCCH format.
8. The method of claim 1 , wherein the initializing the adjustment factor further comprises employing at least one power ramp-up value.
9. The method of claim 1 , wherein the secondary cell is initially deactivated when configured.
10. A wireless device comprising:
one or more processors; and
memory storing instructions that, when executed, cause the wireless device to:
transmit first control information, via a secondary physical uplink control channel (PUCCH) of a secondary cell, with a first transmit power computed based on an adjustment factor;
receive a power control command of the secondary PUCCH;
ignore the power control command by not applying the power control command to the adjustment factor in response to a time alignment timer of a timing advance group comprising the secondary cell not running;
initialize the adjustment factor to a first value; and
transmit second control information on the secondary PUCCH with a second transmit power computed based on the initialized adjustment factor.
11. The wireless device of claim 10 , wherein the instructions, when executed by the one or more processors, further cause the wireless device to receive at least one message comprising configuration parameters of a plurality of cells grouped into a plurality of PUCCH groups, the plurality of PUCCH groups comprising:
a primary PUCCH group comprising a primary cell with a primary PUCCH transmitted to a base station; and
a secondary PUCCH group comprising the secondary cell with the secondary PUCCH transmitted to the base station.
12. The wireless device of claim 11 , wherein the at least one message further comprises random access resource parameters of the PUCCH secondary cell.
13. The wireless device of claim 11 , wherein the at least one message further comprises a pathloss reference parameter indicating a pathloss reference cell for the PUCCH secondary cell.
14. The wireless device of claim 10 , wherein the first value is received in a random access response received on a primary cell.
15. The wireless device of claim 14 , wherein the first control information is transmitted after receiving the random access response.
16. The wireless device of claim 10 , wherein the instructions, when executed by the one or more processors, further cause the wireless device to compute the first transmit power employing one or more second PUCCH power control information elements indicating a power parameter value of at least one PUCCH format.
17. The wireless device of claim 10 , wherein the instructions, when executed by the one or more processors, further cause the wireless device to initialize the adjustment factor employing at least one power ramp-up value.
18. The wireless device of claim 10 , wherein the secondary cell is initially deactivated when configured.