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 transceiver operably connected to a processor, the processor configured to:
determine at least one uplink component carrier and at least two downlink component carriers;
encode hybrid automatic repeat request (HARQ) information bits associated with the at least two downlink component carriers, wherein the HARQ information bits associated with each of the at least two downlink component carriers are jointly encoded;
map the jointly encoded HARQ information bits associated with the at least two downlink component carriers to one or more resource blocks that are used for reporting uplink control information; and
the transceiver configured to transmit the mapped HARQ information bits on physical uplink control channel (PUCCH) carried by a single uplink component carrier of the at least one uplink component carrier.
2. The WTRU as in claim 1 , wherein the one or more resource blocks used for reporting the uplink control information are carrier aggregation based resource blocks, wherein the carrier aggregation based resource blocks transmitted on the PUCCH are allocated to WTRUs for reporting carrier aggregation based control information.
3. The WTRU as in claim 2 , wherein the carrier aggregation based resource blocks transmitted on the PUCCH are allocated to WTRUs for reporting carrier aggregation based control information.
4. The WTRU as in claim 1 , wherein the at least one uplink component carrier is signaled by at least one of radio resource controller signaling, higher layer signaling, or L1 signaling.
5. The WTRU as in claim 1 , wherein the processor is configured to allocate different sets of resource blocks for different sequence lengths.
6. A method of transmitting hybrid automatic repeat request (HARQ) information bits, the method comprising:
determining at least one uplink component carrier and at least two downlink component carriers;
encoding the HARQ information bits associated with the at least two downlink component carriers, wherein the HARQ information bits associated with each of the at least two downlink component carriers are jointly encoded;
mapping the jointly encoded HARQ information bits associated with the at least two downlink component carriers to one or more resource blocks that are used for reporting uplink control information; and
transmitting the mapped HARQ information bits on physical uplink control channel (PUCCH) carried by a single uplink component carrier of the at least one uplink component carrier.
7. The method of claim 6 , wherein the one or more resource blocks used for reporting the uplink control information are carrier aggregation based resource blocks, wherein the carrier aggregation based resource blocks transmitted on the PUCCH are allocated to WTRUs for reporting carrier aggregation based control information.
8. The method of claim 7 , wherein the carrier aggregation based resource blocks transmitted on the PUCCH are allocated to WTRUs for reporting carrier aggregation based control information.
9. The method of claim 6 , wherein the at least one uplink component carrier is signaled by at least one of radio resource controller signaling, higher layer signaling, or L1 signaling.
10. The method of claim 6 comprising allocating different sets of resource blocks for different sequence lengths.