Controlling communications between stations

Details Controlling communications between stations Controlling communications between stations

2001-07-31

2010-02-16

Korzuch, William R (Department: 2431)

Cryptography

Cellular telephone cryptographic authentication

C455S436000, C455S437000, C455S411000, C380S272000

Reexamination Certificate

active

07664265

ABSTRACT:
The present invention relates to relocation of the control of communication between a first station and a second station from a first communication system controller to a second communication system controller. The communication is ciphered by means of a first ciphering key. In the method, after the initiation of the relocation of control of the communication from the first controller to the second controller a request for relocation is transmitted to the second controller. The request contains the first ciphering key and at least one other ciphering key.

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ETSI: “TS 125 413 Universal Mobile Telecommunications System (IMTS); UTRAN Iu Interface RANAP Signalling (3G TS 24.413 Version 3.0.0 Release1999),” ETSI TS 125 413 V3.0.0, XX, XX, Jan. 2000, pp. 1-147.

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