Patent ID: 11968535
Assignee: TELEFONAKTIEBOLAGET LM ERICSSON (PUBL)
Field: Digital communication (Electrical engineering)
Classification: CPC H | IPC H

Claim 9:
10. A User Equipment (UE) comprising:
radio circuitry configured for communicating with access nodes of a communication system; and
processing circuitry operatively associated with the radio circuitry and configured to control the UE to:
obtain, from an access node of the communication system, System Information (SI) and an associated SI signature for a cell served by the access node and which the UE can use;
determine whether the obtained SI signature is valid or invalid;
in response to determining that the SI signature is invalid:
determine whether to bar the cell based on a UE configuration indicating whether cells with invalid SI signatures should be barred and, if not, use the cell, or, if so, bar the cell and select another cell to use; and
trigger Radio Resource Control (RRC) re-establishment and/or Non-Access Stratum (NAS) recovery in addition to barring the cell, when the UE is in RRC_CONNECTED mode and the invalid SI signature is determined after a handover of the UE to a new cell.