Method, system and device for negotiating security capability when terminal moves

CAFC
  • US 8,812,848 B2
  • Filed: 01/03/2014
  • Issued: 08/19/2014
  • Est. Priority Date: 08/31/2007
  • Status: Active Grant
First Claim
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1. A user equipment (UE) comprising:

  • a transmitter configured to send, in situations where the UE moves in idle state from a non-long term evolution (non-LTE) network to a long term evolution (LTE) network, UE security capabilities supported by the UE to the LTE network for a non-access stratum (NAS) security algorithm selection use;

    a receiver configured to receive a selected NAS security algorithm from the LTE network; and

    a processor configured to generate a root key from an authentication vector-related key available at the UE and to derive, from the generated root key, according to the NAS security algorithm, a NAS protection key for communicating with the LTE network.

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