Security process for restarting RRC from inactive state

摘要

A method is provided for the user equipment (UE) (10) in the NR RRC to revert to the old security context if the RRC restart procedure from the inactive state fails. In this way, any subsequent restart attempt by the UE (10) will derive a new security key from the old key, which means that the key and security context will be the same on each attempt. In this way, the security context in UE (10) remains synchronized with the network security context (regardless of the number of attempts made by UE (10)) Suppose you do not change). Alternatively, the UE (10) may store the new security context that it derived during the first restart attempt and then guarantee that it will be reused in subsequent restart attempts. [Selection diagram] Figure 8