Security handling for rrc resume from inactive state

A method of updating a security context, performed by a wireless device operative in a wireless communication network, the method comprising:

• in response to receiving a Radio Resource Control (RRC) Suspect message including a security update parameter, entering an RRC INACTIVE state and storing a first security context;
• and
• upon attempting to transition to an RRC CONNECTED state:
• generating a second security context from the security update parameter received in the RRC Suspend message;
• sending to the network an RRC Resume Request message;
• and
• in response to expiration of a timer started upon sending the RRC Resume Request message, without receiving a responsive message from the network, storing the second security context and utilizing the second security context until confirmed by the network.

A method of updating a security context performable by a wireless device operative in a wireless communication network, the method comprising:

• in response to receiving a Radio Resource Control (RRC) Suspend message including a security update parameter, entering an RRC INACTIVE state and storing a first security context;
• and
• upon attempting to transition to an RRC CONNECTED state:
• generating a second security context from the security update parameter received in the RRC Suspend message;
• sending to the network an RRC Resume Request message;
• and
• in response to performing a cell reselection prior to receiving a message from the network responsive to the RRC Resume Request message, storing the second security context and utilizing the second security context until confirmed by the network.