Power control
There is provided a method, including detecting, by a network node of a first cell, whether or not there is any output power unused in a second cell during a predefined time period, wherein the un-used output power is originally reserved for a transmission on a specific channel in the second cell; upon detecting that there is at least some of the output power unused, determining the amount of the unused output power in the second cell; and applying at least part of the unused output power to boost a predetermined transmission in the first cell.
1. A method, comprising:
detecting, by a network node of a first cell, whether or not there is any output power unused in a second cell during a predefined time period,
wherein the detecting is based on at least one of the following:
the second cell being configured to use cross component carrier scheduling, and
signaling from the second cell, and
wherein the unused output power is originally reserved for a transmission on a specific channel in the second cell;
upon detecting that there is at least some of the output power unused, determining the amount of the unused output power in the second cell; and
applying at least part of the unused output power to boost the output power of downlink control information, DCI, as a predetermined transmission in the first cell.
2. The method of claim 1 , further comprising:
determining an allowed output power level of the second cell;
detecting that there will not be any transmission on the specific channel in the second cell during the predefined time period; and
determining the amount of the unused output power in the second cell on the basis of the detection and the allowed output power level of the second cell.
3. The method of claim 1 , further comprising:
determining an allowed output power level of the second cell;
detecting that there is at least one allocation for a transmission on the specific channel in the second cell during the predefined time period; and
determining the amount of the unused output power in the second cell on the basis of the detection and the allowed output power level of the second cell.
4. The method of claim 1 , further comprising:
boosting the predetermined transmission in the first cell by an amount corresponding to the determined unused output power.
5. The method of claim 1 , wherein the amount of the unused output power applied for the boosting the predetermined transmission in the first cell is further limited by taking into account an allowed output power level of the first cell, the allowed output power level of the second cell, and/or an allowed total output power level of the first and the second cell.
6. The method of claim 1 , wherein the unused output power is originally reserved for a transmission of a control channel on a secondary component carrier in a cross component carrier scheduled carrier aggregation.
7. The method of claim 1 , further comprising:
boosting the output power of a control channel on a primary component carrier in the cross component carrier scheduled carrier aggregation as the predetermined transmission in the first cell.
8. The method of claim 1 , further comprising:
boosting the output power of control channel elements as the predetermined transmission in the first cell.
9. The method of claim 1 , wherein a control channel and/or data channel scheduling and power control are distributed among the plurality of cells.
10. The method of claim 1 , wherein a control channel and/or data channel scheduling and power control are controlled in a centralized manner by one cell among the plurality of cells.
11. An apparatus, comprising:
at least one processor and at least one memory including a computer program code, wherein the at least one memory and the computer program code are configured, with the at least one processor, to cause the apparatus at least to:
detect whether or not there is any output power unused in a second cell during a predefined time period,
wherein the detection is based on at least one of the following:
the second cell being configured to use cross component carrier scheduling, and
signaling from the second cell to the first cell, and
wherein the unused output power is originally reserved tier a transmission on a specific channel in the second cell;
upon detecting that there is at least some of the output power unused, determine the amount of the unused output power in the second cell; and
apply at least part of the unused output power to boost the output power of downlink control information, DCI, as a predetermined transmission in a first cell.
12. The apparatus of claim 11 , wherein the at least one memory and the computer program code are configured, with the at least one processor, to cause the apparatus further to:
determine an allowed output power level of the second cell;
detect that there will not be any transmission on the specific channel in the second cell during the predefined time period; and
determine the amount of the unused output power in the second cell on the basis of the detection and the allowed output power level of the second cell.
13. The apparatus of claim 11 , wherein the at least one memory and the computer program code are configured, with the at least one processor, to cause the apparatus further to:
determine an allowed output power level of the second cell;
detect that there is at least one allocation for a transmission on the specific channel in the second cell during the predefined time period; and
determine the amount of the unused output power in the second cell on the basis of the detection and the allowed output power level of the second cell.
14. The apparatus of claim 11 , wherein the at least one memory and the computer program code are configured, with the at least one processor, to cause the apparatus further to:
boost the predetermined transmission in the first cell by an amount corresponding to the determined unused output power.
15. The apparatus of claim 11 , wherein the amount of the unused output power applied for the boosting the predetermined transmission in the first cell is further limited by taking into account an allowed output power level of the first cell, the allowed output power level of the second cell, and/or an allowed total output power level of the first and the second cell.
16. The apparatus of claim 11 , wherein the unused output power is originally reserved for a transmission of a control channel on a secondary component carrier in a cross component carrier scheduled carrier aggregation.
17. The apparatus of claim 11 , wherein the at least one memory and the computer program code are configured, with the at least one processor, to cause the apparatus further to:
boost the output power of a control channel on a primary component carrier in the cross component carrier scheduled carrier aggregation as the predetermined transmission in the first cell.
18. The apparatus of claim 11 , wherein the at least one memory and the computer program code are configured, with the at least one processor, to cause the apparatus further to:
boost the output power of control channel elements as the predetermined transmission in the first cell.
19. The apparatus of claim 11 , wherein a control channel and/or a data channel scheduling and power control are distributed among the plurality of cells.
20. The apparatus of claim 11 , Wherein a control channel and/or a data channel scheduling and power control are controlled in a centralized manner by one cell among the plurality of cells.
21. An apparatus, comprising process' cans configured to cause the apparatus to perform the method according to claim 1 .
22. A computer program product embodied on a non-transitory distribution medium readable by a computer and comprising program instructions which, when loaded into an apparatus, execute the method according to claim 1 .