name: SC
full_form: Service Continuity
context: the MeNB and the UE, the MeNB generates the S-KeNB for the SeNB and sends it to the SeNB over the X2-C. To generate the S-KeNB, the MeNB associates a counter, called an SCG Counter, with the current AS security context. The SCG Counter is used as freshness input into S-KeNB derivations as described in the clause E.2.4, and guarantees, together with the other provisions in the present clause E, that the KUPenc and the KUPint derived from the same S-KeNB is not re-used with the same input parameters as defined in Annex B of the present specification. The latter would result in key-stream re-use. The MeNB sends the value of the SCG Counter to the UE over the RRC signalling path when it is required to generate a new S-KeNB. The communication established between the SeNB and the UE is protected at the PDCP layer using the AS Secondary Cell security context, or AS SC security context for short. The AS SC security context includes parameters as the AS security context described in clause 7
description: Service Continuity (SC) ensures uninterrupted communication services during dual connectivity scenarios by managing security contexts and counters to prevent key-stream re-use. This mechanism operates across multiple base stations and user equipment, safeguarding communication integrity.
explanation: SC focuses on securing communication channels and preventing vulnerabilities like key-stream re-use, which are core aspects of a security mechanism in telecommunications.
section_title: E.1.2	Dual Connectivity architecture with an SeNB
biotag_Context: O,B-Network Function,O,O,O,O,B-Network Function,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,B-Network Function,O,O,O,O,O,B-Network Function,O,O,O,O,B-Network Function,O,O,O,B-Network Function,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,B-Network Function,O,O,O,O,O,B-Network Function,O,O,O,B-Device,O,O,B-Protocol,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,B-Device,O,O,O,O,B-Protocol,O,O,O,B-Network Function,B-Network Function,I-Network Function,O,O,O,B-Network Function,B-Network Function,O,O,O,O,O,B-Network Function,B-Network Function,O,O,O,O,O,O,B-Network Function,O,O,O,O,O,O
biotag_Description: B-Procedure,I-Procedure,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O