SHORT PHYSICAL UPLINK CONTROL CHANNEL (sPUCCH) STRUCTURE

A method performed by a wireless transmit/receive unit (WTRU), the method comprising:

• receiving a transmission;
• and
• sending an indication of either an acknowledgement (ACK) or a negative ACK (NACK) of the transmission in each resource block (RB) of an interlace of a plurality of RBs over a channel,
• wherein the indication in each RB of the interlace comprises a base sequence representing the ACK or the NACK, wherein the base sequence is cyclically shifted and mapped to each RB of the interlace, and wherein the cyclic shift used in each RB is a function of a RB index of the respective RB.

A wireless transmit/receive unit (WTRU) comprising:

• a transceiver;
• and
• a processor communicatively coupled to the transceiver, wherein the transceiver and processor are configured to:
• receive a transmission;
• and
• send an indication of either an acknowledgement (ACK) or a negative ACK (NACK) of the transmission in each resource block (RB) of an interlace of a plurality of RBs over a channel,
• wherein the indication in each RB of the interlace comprises a base sequence representing the ACK or the NACK, wherein the base sequence is cyclically shifted and mapped to each RB of the interlace, and wherein the cyclic shift used in each RB is a function of a RB index of the respective RB.