Method and Apparatus for Implementing Bearer Specific Changes as Part of a Connection Reconfiguration that Impacts the Security Keys being Used

A method of wireless communication at a user equipment (UE), the method comprising:

• applying a first security key for a first cell group, wherein a first medium access control (MAC) entity of the UE is associated with the first cell group;
• applying a second security key for a second cell group, wherein a second MAC entity of the UE is associated with the second cell group;
• receiving a second reconfiguration message indicating a counter including a value for deriving at least in part a third security key for the second cell group;
• and
• applying the derived third security key for the second cell group, wherein the UE continues to use the first security key for the first cell group, and wherein the first MAC entity is not reset.

An apparatus comprising:

• a controller configured to cause the apparatus to:
• apply a first security key for a first cell group, wherein a first medium access control (MAC) entity of the apparatus is associated with the first cell group;
• apply a second security key for a second cell group, wherein a second MAC entity of the apparatus is associated with the second cell group;
• receive a second reconfiguration message indicating a counter including a value for deriving at least in part a third security key for the second cell group;
• and
• apply the derived third security key for the second cell group, wherein the apparatus continues to use the first security key for the first cell group, and wherein the first MAC entity is not reset.