Patent · US Active

Security context handling in 5G during idle mode

US12302093B2 · kind B2 · utility

0Cited by

7References

16Claims

0Family size

Assignee

Telefonaktiebolaget LM Ericsson (Publ) · SE

Inventors

Noamen Ben Henda · Lambarudd, SE
Christine Jost · Dalby, SE
Karl Norrman · Stockholm, SE
Monica Wifvesson · Lund, SE

Key dates

Filing date	Nov 3, 2023
Grant date	May 13, 2025
Priority date	—
Expiry date	Nov 3, 2043

Classification

Technology area (CPC H)Electricity
CPC primaryH04W36/142
WIPO fieldDigital communication
WIPO sectorElectrical engineering

Abstract

The present disclosure relates to methods and apparatus for flexible, security context management during AMF changes. One aspect of the disclosure is a mechanism for achieving backward security during AMF changes in idle mode. Instead of passing the current NAS key to the target AMF, the source AMF derives a new NAS key, provides the new NAS key to the target AMF, along with a key change indication indicating that the NAS key has changed. The target AMF sends the key change indication to the user equipment.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.