US 12,284,559 B2
Radio network node, wireless device, and methods for performing random access in a wireless communication network
Icaro L. J. Da Silva, Solna (SE); Patrik Rugeland, Stockholm (SE); and Johan Rune, Lidingö (SE)
Assigned to Telefonaktiebolaget LM Ericsson (Publ), Stockholm (SE)
Filed by Telefonaktiebolaget LM Ericsson (publ), Stockholm (SE)
Filed on Jan. 12, 2024, as Appl. No. 18/411,844.
Application 18/411,844 is a continuation of application No. 18/149,354, filed on Jan. 3, 2023, granted, now 11,910,252.
Application 18/149,354 is a continuation of application No. 17/108,637, filed on Dec. 1, 2020, granted, now 11,570,669, issued on Jan. 31, 2023.
Application 17/108,637 is a continuation of application No. 16/605,560, granted, now 10,887,803, issued on Jan. 5, 2021, previously published as PCT/SE2018/050491, filed on May 14, 2018.
Claims priority of provisional application 62/505,145, filed on May 12, 2017.
Prior Publication US 2024/0155446 A1, May 9, 2024
This patent is subject to a terminal disclaimer.
Int. Cl. H04W 36/00 (2009.01); H04W 74/00 (2009.01); H04W 74/0833 (2024.01)
CPC H04W 36/0079 (2018.08) [H04W 36/0072 (2013.01); H04W 74/004 (2013.01); H04W 74/0833 (2013.01)] 11 Claims
OG exemplary drawing
 
1. A method to handover a wireless device in a wireless communication network, the method comprising:
receiving a reconfiguration message that triggers handover execution of the wireless device to a target cell, the reconfiguration message comprising information to access the target cell;
transmitting to a radio network node in the wireless communication network, a first preamble associated with a selected downlink beam;
monitoring the wireless communication network for a random access response, RAR, during a first RAR reception window;
responsive to the RAR not being received during the first RAR reception window, transmitting, to the radio network node, a second preamble associated with a second beam; and
monitoring the wireless communication network for the RAR during a second RAR reception window of a different beam, the first preamble being associated with a channel state information reference signal and the second preamble is associated with a synchronization signal block.