Unified approach to random access channel partitioning and indication

A first apparatus for wireless communication, comprising:

• a memory;
• and
• one or more processors coupled to the memory, wherein the first apparatus is configured to:
• receive, from a second apparatus, information that configures multiple random access channel (RACH) partitions, wherein the multiple RACH partitions are each associated with a respective combination of one or more RACH features;
• determine, from among different RACH features, a RACH feature that has a highest priority;
• determine, from among the different RACH features and based at least in part on more than one RACH partition being associated with the RACH feature having the highest priority, a second RACH feature that has a next highest priority;
• select, if one or more criteria associated with both a first RACH partition and a second RACH partition are satisfied, the first RACH partition based at least in part on relative priorities among the different RACH features, wherein the multiple RACH partitions include the first RACH partition and the second RACH partition, and wherein, to select the first RACH partition, the first apparatus is configured to select the first RACH partition based at least in part on the RACH feature having the highest priority and the second RACH feature having the next highest priority;
• and
• transmit, to the second apparatus, a preamble on physical RACH (PRACH) resources associated with the first RACH partition to initiate a RACH procedure supporting the respective combination of one or more RACH features associated with the first RACH partition.