Aperiodic random access procedures

A method for wireless communication at a base station, comprising:

• transmitting, to a user equipment (UE) from a secondary cell in a first time resource, an indication of an offset and a random access identifier for the UE, the offset comprising a quantity of time resources and scheduling a random access occasion for the UE to transmit a preamble of a random access procedure for the secondary cell;
• monitoring, based at least in part on the transmitted indication of the offset, a second time resource that is offset from the first time resource by the quantity of time resources;
• and
• receiving, from the UE on the secondary cell based at least in part on the monitoring and the indicated random access identifier, the preamble of the random access procedure in the second time resource.

An apparatus for wireless communication at a user equipment (UE), comprising:

• a processor;
• memory coupled with the processor;
• and
• instructions stored in the memory and executable by the processor to cause the apparatus to:
• receive, from a secondary cell of a base station in a first time resource, an indication of an offset and a random access identifier for the UE, the offset comprising a quantity of time resources and scheduling a random access occasion for the UE to transmit a preamble of a random access procedure for the secondary cell;
• determine, based at least in part on the received indication of the offset, a second time resource that is offset from the first time resource by the quantity of time resources;
• and
• transmit, to the secondary cell, the preamble of the random access procedure in the second time resource, the preamble based at least in part on the indicated random access identifier.

An apparatus for wireless communication at a base station, comprising:

• a processor;
• memory coupled with the processor;
• and
• instructions stored in the memory and executable by the processor to cause the apparatus to:
• transmit, to a user equipment (UE) from a secondary cell in a first time resource, an indication of an offset and a random access identifier for the UE, the offset comprising a quantity of time resources and scheduling a random access occasion for the UE to transmit a preamble of a random access procedure for the secondary cell;
• monitor, based at least in part on the transmitted indication of the offset, a second time resource that is offset from the first time resource by the quantity of time resources;
• and
• receive, from the UE on the secondary cell based at least in part on the monitoring and the indicated random access identifier, the preamble of the random access procedure in the second time resource.