Power control for simultaneous transmission of ACK/NACK and channel-state information in carrier aggregation systems
Channel-state information and hybrid-ARQ ACK/NACK information for multiple carriers are simultaneously transmitted using a PUCCH Format 3 structure, where the hybrid-ARQ ACK/NACK bits and CSI bits are separately encoded and interleaved. In an example method, a power control offset parameter is calculated as a linear combination of at least a number N, representing a number of channel-state information bits and a number M, representing a number of hybrid-ARQ ACK/NACK bits. The method continues with the calculating of a power level for a transmission on a physical uplink control channel (PUCCH), using the power control offset parameter. In some embodiments, encoded channel-state information and hybrid-ARQ ACK/NACK bits are then transmitted according to the calculated power level. In some embodiments, the linear combination is of the form aN+bM+c, where a, b, and c are non-zero constants.
1. A method in a mobile terminal configured for simultaneous reporting of channel-state information bits and hybrid-ARQ ACK/NACK bits for multiple downlink subframes, the method comprising, for each of a first plurality of reporting instances:
calculating a power control offset parameter as a linear combination of at least a number N, representing a number of channel-state information bits, and a number M, representing a number of hybrid-ARQ ACK/NACK bits;
calculating a power level for a transmission on a physical uplink control channel (PUCCH), wherein the power level is calculated as a minimum of a configured transmit power and a sum of parameters, wherein one of the parameters in the sum is the power control offset parameter; and
transmitting encoded channel-state information and hybrid-ARQ ACK/NACK bits according to the calculated power level.
2. The method of claim 1 , wherein said linear combination is of the form aN+bM+c, where a, b, and c are non-zero constants.
3. The method of claim 1 , further comprising calculating a power headroom parameter based on the calculated power level and based on a calculated power level for shared channel transmission.
4. The method of claim 3 , further comprising transmitting the power headroom parameter to a base station.
5. The method of claim 1 , wherein the number M represents the number of hybrid-ARQ ACK/NACK bits and a scheduling request (SR) bit.
6. The method of claim 1 , wherein the linear combination further includes a number L, representing a number of scheduling request (SR) bits, and wherein the number M of hybrid-ARQ ACK/NACK bits does not include SR bits.
7. The method of claim 6 , wherein said linear combination is of the form aN+bM+cL+d, where a, b, c, and d are non-zero constants.
8. The method of claim 1 , wherein the number N, representing the number of channel-state information bits, includes at least one of a number of pre-coding matrix indicator (PMI) bits, a number of channel quality indicator (CQI) bits, a number of rank indicator (RI) bits, and a number of pre-coding type indicator (PTI) bits.
9. A method in a mobile terminal configured for simultaneous reporting of channel-state information bits and hybrid-ARQ ACK/NACK bits for multiple downlink carriers, the method comprising, for each of a first plurality of reporting instances:
calculating a power control offset parameter as a linear combination of at least a number N, representing a number of channel-state information bits, and a number M, representing a number of hybrid-ARQ ACK/NACK bits;
calculating a power level for a transmission on a physical uplink control channel (PUCCH), wherein the power level is calculated as a minimum of a configured transmit power and a sum of parameters, wherein one of the parameters in the sum is the power control offset parameter; and
transmitting encoded channel-state information and hybrid-ARQ ACK/NACK bits according to the calculated power level.
10. The method of claim 9 , wherein said linear combination is of the form aN+bM+c, where a, b, and c are non-zero constants.
11. The method of claim 9 , further comprising calculating a power headroom parameter based on the calculated power level and based on a calculated power level for shared channel transmission.
12. The method of claim 11 , further comprising transmitting the power headroom parameter to a base station.
13. The method of claim 9 , wherein the number M represents the number of hybrid-ARQ ACK/NACK bits and a scheduling request (SR) bit.
14. The method of claim 9 , wherein the linear combination further includes a number L, representing a number of scheduling request (SR) bits, and wherein the number M of hybrid-ARQ ACK/NACK bits does not include SR bits.
15. The method of claim 14 , wherein said linear combination is of the form aN+bM+cL+d, where a, b, c, and d are non-zero constants.
16. The method of claim 9 , wherein the number N, representing the number of channel-state information bits, includes at least one of a number of pre-coding matrix indicator (PMI) bits, a number of channel quality indicator (CQI) bits, a number of rank indicator (RI) bits, and a number of pre-coding type indicator (PTI) bits.
17. A mobile terminal configured to simultaneously report channel-state information bits and hybrid-ARQ ACK/NACK bits for multiple downlink subframes, the mobile terminal comprising a receiver circuit, a transmitter circuit, and a processing circuit, wherein the processing circuit is adapted to, for each of a first plurality of reporting instances:
calculate a power control offset parameter as a linear combination of at least a number N, representing a number of channel-state information bits, and a number M, representing a number of hybrid-ARQ ACK/NACK bits;
calculate a power level for a transmission on a physical uplink control channel (PUCCH), wherein the power level is calculated as a minimum of a configured transmit power and a sum of parameters, wherein one of the parameters in the sum is the power control offset parameter; and
control the transmitter circuit to transmit the encoded channel-state information and hybrid-ARQ ACK/NACK bits according to the calculated power level.
18. The mobile terminal of claim 17 , wherein said linear combination is of the form aN+bM+c, where a, b, and c are non-zero constants.
19. The mobile terminal of claim 17 , wherein the processing circuit is further adapted to calculate a power headroom parameter based on the calculated power level and based on a calculated power level for shared channel transmission.
20. The mobile terminal of claim 19 , wherein the processing circuit is further adapted to, for each of the plurality of reporting instances, control the transmitter circuit to transmit the power headroom parameter to a base station.
21. The mobile terminal of claim 17 , wherein the number M represents the number of hybrid-ARQ ACK/NACK bits and a scheduling request (SR) bit.
22. The mobile terminal of claim 17 , wherein the linear combination further includes a number L, representing a number of scheduling request (SR) bits, and wherein the number M of hybrid-ARQ ACK/NACK bits does not include SR bits.
23. The mobile terminal of claim 22 , wherein said linear combination is of the form aN+bM+cL+d, where a, b, c, and d are non-zero constants.
24. The mobile terminal of claim 17 , wherein the number N, representing the number of channel-state information bits, includes at least one of a number of pre-coding matrix indicator (PMI) bits, a number of channel quality indicator (CQI) bits, a number of rank indicator (RI) bits, and a number of pre-coding type indicator (PTI) bits.
25. A mobile terminal configured to simultaneously report channel-state information bits and hybrid-ARQ ACK/NACK bits for multiple downlink carriers, the mobile terminal comprising a receiver circuit, a transmitter circuit, and a processing circuit, wherein the processing circuit is adapted to, for each of a first plurality of reporting instances:
calculate a power control offset parameter as a linear combination of at least a number N, representing a number of channel-state information bits, and a number M, representing a number of hybrid-ARQ ACK/NACK bits;
calculate a power level for a transmission on a physical uplink control channel (PUCCH), wherein the power level is calculated as a minimum of a configured transmit power and a sum of parameters, wherein one of the parameters in the sum is the power control offset parameter; and
control the transmitter circuit to transmit the encoded channel-state information and hybrid-ARQ ACK/NACK bits according to the calculated power level.
26. The mobile terminal of claim 25 , wherein said linear combination is of the form aN+bM+c, where a, b, and c are non-zero constants.
27. The mobile terminal of claim 25 , wherein the processing circuit is further adapted to calculate a power headroom parameter based on the calculated power level and based on a calculated power level for shared channel transmission.
28. The mobile terminal of claim 27 , wherein the processing circuit is further adapted to, for each of the plurality of reporting instances, control the transmitter circuit to transmit the power headroom parameter to a base station.
29. The mobile terminal of claim 25 , wherein the number M represents the number of hybrid-ARQ ACK/NACK bits and a scheduling request (SR) bit.
30. The mobile terminal of claim 25 , wherein the linear combination further includes a number L, representing a number of scheduling request (SR) bits, and wherein the number M of hybrid-ARQ ACK/NACK bits does not include SR bits.
31. The mobile terminal of claim 30 , wherein said linear combination is of the form aN+bM+cL+d, where a, b, c, and d are non-zero constants.
32. The mobile terminal of claim 25 , wherein the number N, representing the number of channel-state information bits, includes at least one of a number of pre-coding matrix indicator (PMI) bits, a number of channel quality indicator (CQI) bits, a number of rank indicator (RI) bits, and a number of pre-coding type indicator (PTI) bits.