| CPC H04L 1/1887 (2013.01) [H04L 1/1822 (2013.01); H04L 5/001 (2013.01); H04L 5/0055 (2013.01); H04L 5/0094 (2013.01); H04L 5/1469 (2013.01); H04W 72/0446 (2013.01); H04W 72/23 (2023.01)] | 12 Claims |

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1. A base station comprising:
a transceiver; and
a processor, wherein the transceiver and the processor are configured to:
transmit, to a wireless transmit/receive unit (WTRU), time division duplex (TDD) configuration information, wherein the TDD configuration information indicates time intervals for downlink communication, uplink communication and uplink and downlink communication;
transmit, to the WTRU, a grant for an uplink transmission, wherein the grant indicates a hybrid automatic repeat request (HARQ) process for uplink transmission; and
receive, from the WTRU, the uplink transmission using the indicated HARQ process in a time interval for uplink and downlink communication.
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