Beam refinement techniques for random access communications

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

• receiving, from a user equipment (UE), an initial random access request to establish a wireless connection with the base station;
• transmitting a control channel order to the UE responsive to the initial random access request;
• determining, based at least in part on the control channel order, a set of resources for one or more modified random access requests;
• monitoring for the one or more modified random access requests using the determined set of resources;
• and
• transmitting a random access response to the UE using one or more beamforming parameters that are based at least in part on measurements associated with the one or more modified random access requests.

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:
• transmit an initial random access request to a base station to establish a wireless connection with the base station;
• receive, subsequent to transmission of the initial random access request, a control channel order from the base station responsive to the initial random access request, the control channel order indicating that the UE is to transmit one or more modified random access requests;
• transmit, in response to the control channel order, the one or more modified random access requests using a set of resources that are based at least in part on the control channel order;
• and
• receive a random access response from the base station responsive to the one or more modified random access requests.

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:
• receive, from a user equipment (UE), an initial random access request to establish a wireless connection with the base station;
• transmit a control channel order to the UE responsive to the initial random access request;
• determine, based at least in part on the control channel order, a set of resources for one or more modified random access requests;
• monitor for the one or more modified random access requests using the determined set of resources;
• and
• transmit a random access response to the UE using one or more beamforming parameters that are based at least in part on measurements associated with the one or more modified random access requests.