Telefonaktiebolaget LM Ericsson (publ)
RANDOM ACCESS PREAMBLE TRANSMISSION USING BEAMFORMING

Abstract:

A method, system and wireless device for random access preamble transmission using beamforming are provided. A wireless device includes processing circuitry including a processor and a memory. The processing circuitry is configured to receive a synchronization signal block, SSB, determine a first beam configuration for reception based on at least part of the received SSB, estimate a reciprocity quality for the first beam configuration in a downlink and an uplink, determine a first random access channel, RACH, preamble transmission configuration based on the estimated reciprocity quality, and transmit a first random access, RA, preamble using the first RACH preamble transmission configuration.