| 摘要 |
Disclosed are a method and system for establishing an enhanced key when a terminal moves from the Evolved Universal Terrestrial Radio Access Network(EUTRAN) to the enhanced Universal Terrestrial Radio Access Network(UTRAN), which ensures that the terminal can safely carry out normal communication in the enhanced UTRAN. The method includes the following steps: when the terminal moves from the EUTRAN to the enhanced UTRAN, the target enhanced Serving General Packet Radio Service(GPRS) Support Node(SGSN+) in the enhanced UTRAN derives an intermediate key used in the UTRAN on the basis of the mapped traditional keys obtained from the source Mobility Management Entity(MME); after deriving the mapped traditional keys, using the same algorithm with the target SGSN+, the terminal derives the intermediate key used in the enhanced UTRAN on the basis of the mapped traditional keys. |
