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AssigneeTelefonaktiebolaget LM Ericsson (publ)
InventorsNoamen Ben Henda, Christine Jost, Karl Norrman, Monica Wifvesson
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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. 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, and sends a key change indication to the UE, either directly or through some other network node. The UE can then derive the new NAS key from the old NAS key. In some embodiments, the AMF may provide a key generation parameter to the UE to use in deriving the new NAS key. In other embodiments, the target AMF may change one or more security algorithms.
A method for establishing a security context during a handover of a user equipment, the method implemented by one or more core network nodes in a core network of the wireless communication network, wherein the one or more core network nodes provide a source mobility management function, the method comprising:
A core network node in a core network of a wireless communication network, the core network node providing a source mobility management function, the core network node comprising:
A method performed by a user equipment for establishing a security context during a handover in a wireless communication network, the method comprising:
A user equipment in a wireless communication network, the user equipment comprising:
Dependencies are inferred from the claim text.