A wireless transmit/receive unit, WTRU, comprising: a processor configured to: receive a physical downlink shared channel, PDSCH, transmission; determine to transmit HARQ information in response to the PDSCH transmission, wherein: on a condition that the WTRU determines to transmit a hybrid automatic repeat request acknowledgment, HARQ-ACK, transmit a first uplink signal using a first sequence, wherein the first sequence is associated with a base sequence and a first cyclic shift, wherein the first uplink signal is transmitted using a number of uplink symbols determined based on an indicator in an associated downlink control channel, wherein the first uplink signal is transmitted in accordance with the first cyclic shift, and wherein the first cyclic shift indicates the HARQ-ACK; and on a condition that the WTRU determines to transmit a HARQ negative ACK, HARQ-NACK, transmit a second uplink signal using a second sequence, wherein the second sequence is associated with the base sequence and a second cyclic shift, wherein the second uplink signal is transmitted using the number of uplink symbols determined based on the indicator in the associated downlink control channel, wherein the second uplink signal is transmitted in accordance with the second cyclic shift, and wherein the second cyclic shift indicates the HARQ-NACK. receive a physical downlink shared channel, PDSCH, transmission; determine to transmit HARQ information in response to the PDSCH transmission, wherein: on a condition that the WTRU determines to transmit a hybrid automatic repeat request acknowledgment, HARQ-ACK, transmit a first uplink signal using a first sequence, wherein the first sequence is associated with a base sequence and a first cyclic shift, wherein the first uplink signal is transmitted using a number of uplink symbols determined based on an indicator in an associated downlink control channel, wherein the first uplink signal is transmitted in accordance with the first cyclic shift, and wherein the first cyclic shift indicates the HARQ-ACK; and on a condition that the WTRU determines to transmit a HARQ negative ACK, HARQ-NACK, transmit a second uplink signal using a second sequence, wherein the second sequence is associated with the base sequence and a second cyclic shift, wherein the second uplink signal is transmitted using the number of uplink symbols determined based on the indicator in the associated downlink control channel, wherein the second uplink signal is transmitted in accordance with the second cyclic shift, and wherein the second cyclic shift indicates the HARQ-NACK. on a condition that the WTRU determines to transmit a hybrid automatic repeat request acknowledgment, HARQ-ACK, transmit a first uplink signal using a first sequence, wherein the first sequence is associated with a base sequence and a first cyclic shift, wherein the first uplink signal is transmitted using a number of uplink symbols determined based on an indicator in an associated downlink control channel, wherein the first uplink signal is transmitted in accordance with the first cyclic shift, and wherein the first cyclic shift indicates the HARQ-ACK; and on a condition that the WTRU determines to transmit a HARQ negative ACK, HARQ-NACK, transmit a second uplink signal using a second sequence, wherein the second sequence is associated with the base sequence and a second cyclic shift, wherein the second uplink signal is transmitted using the number of uplink symbols determined based on the indicator in the associated downlink control channel, wherein the second uplink signal is transmitted in accordance with the second cyclic shift, and wherein the second cyclic shift indicates the HARQ-NACK.