Granted Patent B2

US 12,543,236 · App. 18/417,591 · Granted Feb 3, 2026

Inventors: Icaro Leonardo J. Da Silva (Solna, SE); Magnus Stattin (Upplands Väsby, SE)

Assignee: Telefonaktiebolaget LM Ericsson (publ)

H04W76/19H04W12/106H04W12/122

Abstract

Claims (16)

1 . A method performed by a user equipment, UE, in communication with a network for performing a re-establishment procedure, the method comprising:

receiving a message from a radio base station;

receiving an integrity check failure indication for the received message;

upon receiving the integrity check failure indication, initiating an RRC connection re-establishment procedure except if the received message is a RRCReestablishment message;

performing actions upon going to RRC_IDLE with release cause RRC connection failure if the received message is a RRCReestablishment message.

2 . The method of claim 1 , wherein the RRCReestablishment message comprises a message for re-establishing a connection.

3 . The method of claim 1 , wherein the received message comprises a message for re-establishing a connection in response to the re-establishment request transmitted by the UE and/or a message that is integrity protected that is transmitted by the network after receiving the re-establishment request transmitted by the UE.

4 . The method of claim 1 , wherein steps of receiving, initiating, and performing are performed by a first layer in a radio protocol architecture stack.

5 . A user equipment, UE, in communication with a network for performing a re-establishment procedure, the UE comprising processing circuitry configured to:

receive a message from a radio base station;

receive an integrity check failure indication for the received message;

upon receiving the integrity check failure indication, initiate an RRC connection re-establishment procedure except if the received message is a RRCReestablishment message;

perform actions upon going to RRC_IDLE with release cause RRC connection failure if the received message is a RRCReestablishment message.

6 . The UE of claim 5 , wherein the RRCReestablishment message comprises a message for re-establishing a connection.

7 . The UE of claim 5 , wherein the received message comprises a message for re-establishing a connection in response to the re-establishment request transmitted by the UE and/or a message that is integrity protected that is transmitted by the network after receiving the re-establishment request transmitted by the UE.

8 . The UE of claim 5 , wherein steps of receiving, initiating, and performing are performed by a first layer in a radio protocol architecture stack.

Assignments (1)

Continuity (3)

References Cited (39)