Prioritization between multiple random access channel procedures

A user equipment, UE, the UE comprising:

• processing circuitry;
• and
• memory coupled to the processing circuitry and having instructions stored therein that are executable by the processing circuitry to cause the UE to perform operations comprising:
• determining that a first trigger to initiate a first random access, RA, procedure has been met;
• subsequent to determining that the first trigger has been met and prior to the first RA occasion, determining that a second trigger to initiate a second RA procedure has been met;
• responsive to determining that the second trigger has been met, prioritizing one of the first RA procedure or the second RA procedure, wherein prioritizing the first RA procedure or the second RA procedure is based on one or more prioritization rules, the prioritization rules including at least one of:
• prioritize the RA procedure associated with a serving cell;
• prioritize the RA procedure that is triggered due to a failure event;
• prioritize the RA procedure that is triggered due to an early UL sync procedure;
• prioritize the RA procedure based on an order for which the indication to initiate the RA procedures is received;
• prioritize the RA procedure based on L1 measurements;
• prioritize the RA procedure based on L3 measurements;
• prioritize the RA procedure based on a strongest cell out of “N” cells, according to a measurement quantity;
• prioritize the RA procedure associated with a cell based on when the communication last performed a random access procedure with the cell;
• prioritize the RA procedure for which the UE has initiated a random access procedure and is about to perform a random access preamble retransmission;
• prioritize the RA procedure for which it performs a first random access preamble transmission;
• prioritize the RA procedure for which the random access would be transmitted with highest power;
• prioritize the RA procedure for which the random access would be transmitted with lowest power;
• prioritize the RA procedure based on link budget;
• prioritize the RA procedure based on feature prioritization for the random access;
• prioritize the RA procedure for which the random access is a 2-step random access;
• prioritize the RA procedure for which the random access is a 4-step random access;
• prioritize the RA procedure for which the random access is a contention-free random access;
• prioritize the RA procedure for which the random access is a contention-based random access;
• prioritize the RA procedure based on random access resource selection;
• prioritize the RA procedure for which beam failure recovery timer is running or not running;
• prioritize the RA procedure based on random selection;
• prioritize the RA procedure based on round-robin selection;
• prioritize the RA procedure based on access barring or access control;
• prioritize the RA procedure associated with a L1/L2-Triggered Mobility, LTM, candidate cell in detriment of a RA to a serving cell when the UE has received the trigger for RACH transmission to the LTM candidate cell in response to a PDCCH order received in response to a lower layer measurement;
• and
• prioritize performing RA to a first LTM candidate cell in detriment of performing RA to a second LTM candidate cell when RA to the first LTM candidate cell is triggered for an LTM cell switch compared to the triggering of RA to the second LTM candidate cell being for other events.

A non-transitory computer-readable medium having instructions stored therein that, when executed by processing circuitry of a user equipment (UE), cause the UE to perform operations comprising:

• determining that a first trigger to initiate a first random access, RA, procedure has been met;
• subsequent to determining that the first trigger has been met and prior to the first RA occasion, determining that a second trigger to initiate a second RA procedure has been met;
• responsive to determining that the second trigger has been met, prioritizing one of the first RA procedure or the second RA procedure, wherein prioritizing the first RA procedure or the second RA procedure is based on one or more prioritization rules, the prioritization rules including at least one of:
• prioritize the RA procedure associated with a serving cell;
• prioritize the RA procedure that is triggered due to a failure event;
• prioritize the RA procedure that is triggered due to an early UL sync procedure;
• prioritize the RA procedure based on an order for which the indication to initiate the RA procedures is received;
• prioritize the RA procedure based on L1 measurements;
• prioritize the RA procedure based on L3 measurements;
• prioritize the RA procedure based on a strongest cell out of “N” cells, according to a measurement quantity;
• prioritize the RA procedure associated with a cell based on when the communication last performed a random access procedure with the cell;
• prioritize the RA procedure for which the UE has initiated a random access procedure and is about to perform a random access preamble retransmission;
• prioritize the RA procedure for which it performs a first random access preamble transmission;
• prioritize the RA procedure for which the random access would be transmitted with highest power;
• prioritize the RA procedure for which the random access would be transmitted with lowest power;
• prioritize the RA procedure based on link budget;
• prioritize the RA procedure based on feature prioritization for the random access;
• prioritize the RA procedure for which the random access is a 2-step random access;
• prioritize the RA procedure for which the random access is a 4-step random access;
• prioritize the RA procedure for which the random access is a contention-free random access;
• prioritize the RA procedure for which the random access is a contention-based random access;
• prioritize the RA procedure based on random access resource selection;
• prioritize the RA procedure for which beam failure recovery timer is running or not running;
• prioritize the RA procedure based on random selection;
• prioritize the RA procedure based on round-robin selection;
• prioritize the RA procedure based on access barring or access control;
• prioritize the RA procedure associated with a L1/L2-Triggered Mobility, LTM, candidate cell in detriment of a RA to a serving cell when the UE has received the trigger for RACH transmission to the LTM candidate cell in response to a PDCCH order received in response to a lower layer measurement;
• and
• prioritize performing RA to a first LTM candidate cell in detriment of performing RA to a second LTM candidate cell when RA to the first LTM candidate cell is triggered for an LTM cell switch compared to the triggering of RA to the second LTM candidate cell being for other events.