Aspects relate to an uplink channel resource indication for dynamic time division duplex systems where a number of various slot formats may be utilized. A slot format indicator (ID) for a physical uplink control channel (PUCCH) may be mapped to a respective uplink channel resource identifier (ID). The mapping correlates the slot format ID with the uplink channel resource ID to thereby identify at least one particular sub-slot or symbol in a slot usable for uplink (UL) transmissions on the uplink channel.