US 12,273,927 B2
Multi-beam random access procedure in handover execution
Icaro L. J. Da Silva, Solna (SE); Henrik Sahlin, Molnlycke (SE); Mats Folke, Vallingby (SE); Janne Peisa, Espoo (FI); and Jan Christoffersson, Lulea (SE)
Assigned to Telefonaktiebolaget LM Ericsson (publ), Stockholm (SE)
Filed by TELEFONAKTIEBOLAGET LM ERICSSON (PUBL), Stockholm (SE)
Filed on Sep. 10, 2023, as Appl. No. 18/244,269.
Application 18/244,269 is a continuation of application No. 16/651,083, granted, now 11,758,585, previously published as PCT/IB2018/057577, filed on Sep. 28, 2018.
Claims priority of provisional application 62/564,496, filed on Sep. 28, 2017.
Prior Publication US 2023/0422312 A1, Dec. 28, 2023
Int. Cl. H04W 74/08 (2024.01); H04W 36/00 (2009.01); H04W 72/02 (2009.01); H04W 72/044 (2023.01); H04W 72/54 (2023.01); H04W 74/0833 (2024.01)
CPC H04W 74/0833 (2013.01) [H04W 36/0064 (2023.05); H04W 72/02 (2013.01); H04W 72/046 (2013.01); H04W 72/54 (2023.01)] 11 Claims
OG exemplary drawing
 
1. A method in a user equipment (UE) comprising:
receiving a configuration message from a network node, the configuration message comprising information about one or more dedicated random access channel (RACH) resources associated with one or more beams of a target cell, wherein the information further comprising at least one synchronization signal block (SSB) threshold and at least one channel state information reference signal (CSI-RS) threshold;
obtaining an estimate of a beam quality for each beam associated with the one or more dedicated RACH resources in the configuration message;
upon determining there is at least one SSB with a beam quality greater than the at least one SSB threshold, selecting an SSB with a beam quality greater than the SSB threshold;
upon determining there is no SSB with a beam quality greater than the at least one SSB threshold and there is at least one CSI-RS with a beam quality greater than the CSI-RS threshold, selecting a CSI-RS with a beam quality greater than the CSI-RS threshold; and
transmitting a random access preamble using the selected SSB or CSI-RS.