Uplink control information transmission methods for carrier aggregation
A method and apparatus for transmitting uplink control information (UCI) for Long Term Evolution-Advanced (LTE-A) using carrier aggregation is disclosed. Methods for UCI transmission in the uplink control channel, uplink shared channel or uplink data channel are disclosed. The methods include transmitting channel quality indicators (CQI), precoding matrix indicators (PMI), rank indicators (RI), hybrid automatic repeat request (HARQ) acknowledgement/non-acknowledgement (ACK/NACK), channel status reports (CQI/PMI/RI), source routing (SR) and sounding reference signals (SRS). In addition, methods for providing flexible configuration in signaling UCI, efficient resource utilization, and support for high volume UCI overhead in LTE-A are disclosed.
1. A wireless transmit/receive unit (WTRU) comprising:
a processor configured to at least:
receive, via a radio resource control (RRC) message, uplink control information (UCI) configuration information, wherein the UCI configuration information comprises a configuration of periodic physical uplink shared channel (PUSCH) transmissions associated with periodic UCI reporting;
receive a first physical downlink control channel (PDCCH) transmission, wherein the first PDCCH transmission comprises a first downlink control information (DCI), wherein the first DCI indicates activation of the periodic UCI reporting on the periodic PUSCH transmission configured using the UCI configuration information, and wherein the first DCI indicates PUSCH resources to be used for the periodic UCI reporting;
perform a validation check on the first DCI, wherein the validation check on the first DCI comprises at least a determination that one or more fields of the first DCI are set according to a set of predetermined values; and
on a condition that the validation of the first DCI is successful, periodically report UCI using the UCI configuration information received via the RRC message and the PUSCH resources indicated via the first DCI.
2. The WTRU of claim 1 , wherein the UCI configuration information received via the RRC message indicates at least a periodicity to be used for the periodic UCI reporting.
3. The WTRU of claim 1 , wherein the first DCI further indicates a modulation and coding (MCS) scheme to be used for the periodic UCI reporting.
4. The WTRU of claim 1 , wherein the PUSCH resources are semi-statically configured.
5. The WTRU of claim 1 , wherein the PUSCH resources comprise at least one of a PUSCH resource size or a PUSCH resource block allocation.
6. The WTRU of claim 1 , wherein the processor is further configured to measure the UCI.
7. The WTRU of claim 1 , wherein the processor is further configured to:
receive a second PDCCH transmission, wherein the second PDCCH transmission comprises a second DCI indicating deactivation of the periodic UCI reporting;
perform a validation check on the second DCI, wherein the validation check on the second DCI comprises at least a determination that one or more fields of the second DCI are set according to a set of predetermined values; and
on a condition that the validation of the second DCI is successful,
deactivate the periodic UCI reporting, and
release the PUSCH resources used for the periodic UCI reporting.
8. The WTRU of claim 1 , wherein the periodic UCI reporting reports one or more of channel quality information (CQI), a precoding matrix index (PMI), or a rank indicator (RI).
9. The WTRU of claim 1 , wherein the periodic UCI reporting reports a wideband UCI or a sub-band UCI.
10. The WTRU of claim 1 , wherein the first PDCCH transmission comprises the first downlink control information (DCI).
11. A method for reporting uplink control information (UCI), the method comprising:
receiving, via a radio resource control (RRC) message, UCI configuration information, wherein the UCI configuration information comprises a configuration of periodic physical uplink shared channel (PUSCH) transmissions associated with periodic UCI reporting;
receiving a first physical downlink control channel (PDCCH) transmission, wherein the first PDCCH transmission comprises a first downlink control information (DCI), wherein the first DCI indicates activation of the periodic UCI reporting on the periodic PUSCH transmissions configured using the UCI configuration information, and wherein the first DCI indicates PUSCH resources to be used for the periodic UCI reporting; and
performing a validation check on the first DCI, wherein the validation check on the first DCI comprises at least a determination that one or more fields of the first DCI are set according to a set of predetermined values; and
on a condition that the validation of the first DCI is successful, periodically reporting the UCI using the UCI configuration information received via the RRC message and the PUSCH resources indicated via the first DCI.
12. The method of claim 11 , wherein the UCI configuration information received via the RRC message indicates at least a periodicity to be used for the periodic UCI reporting.
13. The method of claim 11 , wherein the first DCI further indicates a modulation and coding (MCS) scheme to be used for the periodic UCI reporting.
14. The method of claim 11 , wherein the PUSCH resources are semi-statically configured.
15. The method of claim 11 , wherein the PUSCH resources comprise at least one of a PUSCH resource size or a PUSCH resource block allocation.
16. The method of claim 11 further comprising measuring the UCI.
17. The method of claim 11 further comprising:
receiving a second PDCCH transmission, wherein the second PDCCH transmission comprises a second DCI indicating deactivation of the periodic UCI reporting;
performing a validation check on the second DCI, wherein the validation check on the second DCI comprises at least a determination that one or more fields of the second DCI are set according to a set of predetermined values; and
on a condition that the validation of the second DCI is successful, deactivating the periodic UCI reporting, and releasing the PUSCH resources used for the periodic UCI reporting.
18. The method of claim 11 , wherein the periodic UCI reporting reports one or more of channel quality information (CQI), a precoding matrix index (PMI), or a rank indicator (RI).
19. The method of claim 11 , wherein the periodic UCI reporting reports a wideband UCI or a sub-band UCI.
20. The method of claim 11 , wherein the first DCI comprises a semi-static indication of activating the periodic UCI reporting.