Autonomous user equipment transmission power control in communication systems
Apparatus and method for adjusting at a user equipment a power level of a first signal type transmitted over a set of resource elements (REs). The method includes transmitting the first signal type with a first power level over a first set of REs, and transmitting the first signal type with a second power level over a second set of REs, wherein the second power level is higher than the first power level and the second set of REs is a sub-set of the first set of REs.
1. A method for adjusting at a user equipment (UE) a power level of a first type signal transmitted over a set of resource elements (REs), the method comprising:
transmitting, by a power control unit of the UE, the first type signal with a first power level when the first type signal is transmitted over a first set of REs; and
transmitting, by the power control unit of the UE, the first type signal with a second power level when the first type signal is transmitted over a second set of REs,
wherein the second power level is higher than the first power level and the second set of REs is a sub-set of the first set of REs, the first and second sets of REs each including a plurality of time-frequency resource units in a transmission symbol.
2. The method of claim 1 , wherein the first type signal is a data signal.
3. The method of claim 1 , further comprising transmitting a second type signal in REs belonging in the first set of REs and not belonging in the second set of REs.
4. The method of claim 3 , wherein the second type signal is a control signal.
5. The method of claim 4 , wherein the control signal comprises at least one of an acknowledgement signal, a channel quality indicator signal, a precoding matrix indicator signal, and a rank indicator signal.
6. The method of claim 3 , wherein the second type signal comprises a sounding reference signal.
7. The method of claim 1 , wherein the first power level is determined based on a size of the first set of REs and the second power level is based on a size of the second set of REs.
8. An apparatus for adjusting at a user equipment (UE) a power level of a first type signal transmitted over a set of resource elements (REs), the apparatus comprising:
an amplification unit of the UE to provide power for transmitting the first type signal; and
a power control unit of the UE to apply a first power level to the amplification unit when the first type signal is transmitted over a first set of REs, and a second power level to the amplification unit when the first type signal is transmitted over a second set of REs,
wherein the second power level is higher than the first power level and the second set of REs is a sub-set of the first set of REs, the first and second sets of REs each including a plurality of time-frequency resource units in a transmission symbol.
9. The apparatus of claim 8 , wherein the first type signal is a data signal.
10. The apparatus of claim 8 , wherein a second type signal is transmitted in REs belonging in the first set of REs and not belonging in the second set of REs.
11. The apparatus of claim 10 , wherein the second type signal is a control signal.
12. The apparatus of claim 11 , wherein the control signal comprises of at least one of an acknowledgement signal, a channel quality indicator signal, a precoding matrix indicator signal, and a rank indicator signal.
13. The apparatus of claim 10 , wherein the second type signal comprises a sounding reference signal.
14. The apparatus of claim 8 , wherein the first power level is determined based on a size of the first set of REs and the second power level is based on the size of the second set of REs.
15. The method of claim 1 , further comprising adjusting a Modulation and Coding Scheme (MCS) for the first type signal based on a size of the first set of REs, the MCS being used in the transmitting the first type signal.
16. The apparatus of claim 8 , wherein the power control unit of the UE is adapted to adjust a Modulation and Coding Scheme (MCS) for the first type signal based on a size of the first set of REs, the MCS being used for a transmission of the first type signal.
17. The method of claim 1 , wherein the first type signal comprises one of an initial transmission of data and a non-adaptive Hybrid Automatic Repeat reQuest HARQ retransmission of the data when the first type signal is transmitted over the first set of REs, and
the first type signal comprises another one of the initial transmission of data and the non-adaptive HARQ retransmission of the data when the first type signal is transmitted over the second set of REs.
18. The apparatus of claim 8 , wherein the first type signal comprises one of an initial transmission of data and a non-adaptive Hybrid Automatic Repeat reQuest HARQ retransmission of the data when the first type signal is transmitted over the first set of REs, and
the first type signal comprises another one of the initial transmission of data and the non-adaptive HARQ retransmission of the data when the first type signal is transmitted over the second set of REs.