| CPC H04B 7/088 (2013.01) [H04W 72/542 (2023.01); H04W 74/002 (2013.01); H04W 74/0833 (2013.01); H04W 76/10 (2018.02)] | 20 Claims |
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1. A method, comprising:
generating, by a radio access node comprising a processor, a random access channel configuration comprising a coverage criterion applicable to a coverage for a user equipment, a first resource indication of a first random access channel resource, and a second resource indication of a second random access channel resource, wherein the random access channel configuration further comprises at least one random access channel preamble tuple comprising preambles associated with respective beam strength ranks of available downlink beams;
transmitting, by the radio access node, the random access channel configuration to the user equipment;
receiving, from the user equipment, a first random access channel preamble portion via the first random access channel resource corresponding to the first resource indication, wherein the first random access channel preamble portion is associated with a first beam strength rank of the respective beam strength ranks;
receiving, from the user equipment, a second random access channel preamble portion via the second random access channel resource corresponding to the second resource indication, wherein the second random access channel preamble portion is associated with a second beam strength rank of the respective beam strength ranks;
detecting, by the radio access node, the second random access channel preamble portion from the second random access channel resource without detecting the first random access channel preamble portion;
determining, by the radio access node based on the detecting of the second random access channel preamble portion, that using a second downlink beam of the available downlink beams corresponding to the second random access channel preamble portion results in a second strongest measured signal strength of the available downlink beams at the user equipment;
transmitting, by the radio access node to the user equipment, a connection establishment message via the second downlink beam;
transmitting, by the radio access node via the second downlink beam, a downlink beam strength report request to the user equipment that requests an indication of a strongest downlink beam of the available downlink beams, the usage of which results in a strongest measured signal strength of the available downlink beams at the user equipment;
receiving, by the radio access node in response to the downlink beam strength report request, the indication of the strongest downlink beam of the available downlink beams at the user equipment;
based on the indication of the strongest downlink beam of the available downlink beams assigning, by the radio access node, the strongest downlink beam to be a first downlink beam; and
transmitting, by the radio access node, a connection establishment message signal to the user equipment via the first downlink beam that corresponds to the first random access channel resource.
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