METHOD OF CONTROLLING A NETWORK ENTITY AND A MOBIL

专利名称：METHOD OF CONTROLLING A NETWORK

ENTITY AND A MOBILE STATION

发明人：HOWARD, Joe申请号：EP02754762.9申请日：20020626公开号：EP1516451B1公开日：20060125

摘要：A method of controlling a network entity (4, 5) of a mobile communicationnetwork and a mobile station (1) is described, as well as a corresponding mobile stationand network entity. The network entity (4, 5) and the mobile station (1) are arranged toconduct a plurality of predetermined message exchange procedures in the course ofwhich predetermined messages are exchanged between said network entity (4, 5) andsaid mobile station (1) depending on the given procedure. The predetermined messagesmay be encrypted, an encrypted message being any message of which at least a part isencrypted. The network entity (4, 5) and the mobile station (1) are furthermore arrangedto conduct one or more encryption key generation procedures in parallel during whichthe network entity (4, 5) and the mobile station (1) generate and store respectivecorresponding encryption keys, in order to be able to encrypt and decrypt exchangedmessages. The method comprises a step of determining (S21) whether a receivedmessage from the mobile station is encrypted. If the received message is encrypted, it isdetermined (S22) whether a correct encryption key for decrypting said message isavailable to said network entity (4, 5), and if no correct key is available, a predeterminedtriggering message is sent to said mobile station (1). The mobile station (1) then

interrupts (S33) the procedure in the course of which it sent the encrypted message forwhich the network entity (4, 5) did not have a correct key, and initiates (S34) an encryptionkey generation procedure.

申请人：ERICSSON TELEFON AB L M

地址：SE

国籍：SE

代理机构：HOFFMANN EITLE

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