| 摘要 |
PURPOSE:To make it unnecessary for a mobile station to retransmit key information to a new base station of transferred zone at zone transfer, by making a system constituted that the key information of encryption in mobile communication is stored at a line control station. CONSTITUTION:In encryption for communication by a mobile station 2, the encryption request information from the mobiel station 2 and the key information f1 of encryption are transmitted to a base station 1. The station 1 receives it and returns the encryption confirming signal to the station 2, and the key information f3 is transmitted to a line control station 3 for storage. Since encryption is made with this constitution, even if the station 2 moves from a zone Z1 to Z2, when the key information f3 is transmitted from the station 3 to a new base station 1a to be transferred, the encryption can be kept without the transmission of key information from the station 2 to the station 1a. |
