A method for updating a key in an active state is disclosed according to the embodiments of the present invention. The method includes steps of: initiating a key update by a user equipment in the active state or a network side when a pre-defined condition is met; updating the key by the network side...http://www.google.fr/patents/US8144877?utm_source=gb-gplus-shareBrevet US8144877 - Method and apparatus for updating a key in an active state
Method and apparatus for updating a key in an active state
