Managing security contexts and performing key derivation at handover in a wireless communication system
AssigneeTelefonaktiebolaget LM Ericsson (publ)
InventorsOscar Ohlsson, Gunnar Mildh, Prajwol Kumar Nakarmi
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Abstract
There is provided a method for determining a security context for communication between a wireless device and a target network node at handover. The method comprises obtaining (S1) information representative of the type of Radio Access Technology, also referred to as RAT type, of the target network node, and deriving and/or determining (S2) the security context at least partly based on the information representative of the RAT type.
Claims26
A method for determining a security context for communication between a wireless device and a target network node at handover of the wireless device in a wireless network, wherein the method is performed by a network node or device other than the target network node, wherein the method comprises:
- obtaining first information representative of the type of Radio Access Technology (RAT) of the target network node and second information representing properties, other than the type of RAT, of a target cell for the handover, wherein the first information does not represent the properties represented by the second information;
- and
- deriving and/or determining the security context at least partly based on the first information representative of the type of RAT.
A device configurable to determine a security context for communication between a wireless device and a target network node at handover of the wireless device in a wireless network, the device being a network node or device other than the target network node, the device comprising:
- at least one processor;
- and
- at least one memory storing computer-executable instructions that, when executed by the at least one processor, configure the device to:
- obtain first information representative of the type of Radio Access Technology (RAT) of the target network node and second information representing properties, other than the type of RAT, of a target cell for the handover, wherein the first information does not represent the properties represented by the second information;
- and
- derive and/or determine the security context based on the first information representative of the type of RAT.
Dependencies are inferred from the claim text.