Supporting uplink transmissions
A method and a wireless transmit/receive unit (WTRU) supporting uplink transmissions. The method being used in a WTRU and comprising transmitting a data block to a base station using a hybrid automatic repeat request (H-ARQ) process, receiving uplink scheduling information from the base station, wherein the uplink scheduling information includes a H-ARQ process identification for the H-ARQ process, and determining whether to retransmit the data block based on the received uplink scheduling information and not based on whether the WTRU has received a negative acknowledgement (NACK) from the base station. The uplink scheduling information includes physical channel resources. The uplink scheduling information is received from a primary cell and the WTRU transmits to the primary cell and at least one secondary cell. The scheduling information indicates a modulation and coding scheme.
1. A wireless transmit/receive unit (WTRU) comprising:
at least one transceiver; and
a processor;
wherein the at least one transceiver and the processor are configured to cause the WTRU to:
transmit, using a hybrid automatic repeat request (H-ARQ) process, a data block to a base station;
receive uplink scheduling information from the base station, wherein the uplink scheduling information includes a H-ARQ process identification for the H-ARQ process; and
determine whether to retransmit the data block based on the received uplink scheduling information and not based on whether the WTRU has received a negative acknowledgement (NACK) from the base station.
2. The WTRU of claim 1 , wherein the at least one transceiver and the processor are further configured to cause the WTRU to, in response to a determination to retransmit the data block, retransmit the data block.
3. The WTRU of claim 2 , wherein the data block is retransmitted using physical channel resources included in the uplink scheduling information.
4. The WTRU of claim 1 , wherein the reception of the uplink scheduling information initiates retransmission of a negatively acknowledged (NACK'ed) data block.
5. The WTRU of claim 1 , wherein the uplink scheduling information includes physical channel resources.
6. The WTRU of claim 1 , wherein the uplink scheduling information is received from a primary cell and the WTRU transmits to the primary cell and at least one secondary cell.
7. The WTRU of claim 1 , wherein the at least one transceiver and the processor are further configured to cause the WTRU to receive an ACK/NACK signal from the base station.
8. The WTRU of claim 1 , wherein the scheduling information indicates a modulation and coding scheme.
9. The WTRU of claim 1 , wherein the transmitted data block has a first modulation and coding scheme (MCS) and the scheduling information indicates a second MCS, wherein the first MCS and the second MCS are different.
10. The WTRU of claim 9 , wherein the at least one transceiver and the processor are further configured to cause the WTRU to, in response to a determination to retransmit the data block, retransmit the data block using the second MCS.
11. A method comprising:
transmitting, by a wireless transmit/receive unit (WTRU), a data block to a base station using a hybrid automatic repeat request (H-ARQ) process;
receiving, by the WTRU, uplink scheduling information from the base station, wherein the uplink scheduling information includes a H-ARQ process identification for the H-ARQ process; and
determining, by the WTRU, whether to retransmit the data block based on the received uplink scheduling information and not based on whether the WTRU has received a negative acknowledgement (NACK) from the base station.
12. The method of claim 11 further comprising, in response to a determination to retransmit the data block, retransmitting, by the WTRU, the data block.
13. The method of claim 12 , wherein the data block is retransmitted using physical channel resources included in the uplink scheduling information.
14. The method of claim 11 , wherein the reception of the uplink scheduling information initiates retransmission of a negatively acknowledged (NACK'ed) data block.
15. The method of claim 11 , wherein the uplink scheduling information includes physical channel resources.
16. The method of claim 11 , wherein the uplink scheduling information is received from a primary cell and the WTRU transmits to the primary cell and at least one secondary cell.
17. The method of claim 11 further comprising receiving, by the WTRU, an ACK/NACK signal from the base station.
18. The method of claim 11 , wherein the scheduling information indicates a modulation and coding scheme.
19. The method of claim 11 , wherein the transmitted data block has a first modulation and coding scheme (MCS) and the scheduling information indicates a second MCS, wherein the first MCS and the second MCS are different.
20. The method of claim 19 further comprising, in response to a determination to retransmit the data block, retransmitting the data block using the second MCS.