communicating with a base station according to a first uplink grant configuration scheduling a first set of uplink transmission occasions having a first density;

determining that the first density of the first set of uplink transmission occasions is to be increased;

transmitting, to the base station and based at least in part on the determination, a resource modification information request indicating a requested increase in the first density of the first set of uplink transmission occasions,

wherein the resource modification information request comprises information to support assignment of hybrid automatic repeat request (HARQ) identifiers in a second uplink grant configuration associated with the increase in the first density of the first set of uplink transmission occasions to avoid repeating an HARQ process identifier or overlapping with active HARQ process identifiers of the first configuration; and

receiving, in response to the resource modification information request, a message increasing the first set of uplink transmission occasions to a second density that is greater than the first density,

wherein the UE determines that there is at least one active HARQ process having a corresponding HARQ identifier associated with the first uplink grant configuration, and wherein the information to support assignment of HARQ identifiers in the second uplink grant configuration is configured based at least in part on the at least one active HARQ process.