US 11,877,332 B2
Master cell group failure handling by a master node
Osman Nuri Can Yilmaz, Espoo (FI); Stefan Wager, Espoo (FI); Oumer Teyeb, Solna (SE); Patrik Rugeland, Stockholm (SE); and Antonino Orsino, Masala (FI)
Assigned to TELEFONAKTIEBOLAGET LM ERICSSON (PUBL), Stockholm (SE)
Filed by TELEFONAKTIEBOLAGET LM ERICSSON (PUBL), Stockholm (SE)
Filed on Jul. 16, 2020, as Appl. No. 16/930,573.
Application 16/930,573 is a continuation of application No. PCT/IB2020/050933, filed on Feb. 5, 2020.
Claims priority of provisional application 62/804,806, filed on Feb. 13, 2019.
Claims priority of application No. PCT/IB2019/051082 (WO), filed on Feb. 11, 2019.
Prior Publication US 2020/0351968 A1, Nov. 5, 2020
Int. Cl. H04W 76/27 (2018.01); H04W 72/04 (2023.01); H04W 36/00 (2009.01); H04W 76/15 (2018.01); H04W 76/19 (2018.01); H04W 24/10 (2009.01)
CPC H04W 76/15 (2018.02) [H04W 24/10 (2013.01); H04W 36/0058 (2018.08); H04W 36/0069 (2018.08); H04W 76/19 (2018.02); H04W 76/27 (2018.02)] 21 Claims
OG exemplary drawing
 
1. A method performed by a user equipment (UE) comprising:
detecting a failure relating to a connection between the UE and a Master Cell Group (MCG);
providing, to a master node via a Secondary Cell Group (SCG), a Radio Resource Control (RRC) MCG Failure Information message relating to the detected failure;
receiving, from the master node via the SCG, an RRC Reconfiguration message indicating to the UE to perform a connection reconfiguration with sync and update a security key; and
responsive to the RRC Reconfiguration message, performing a random access procedure.