Title:
【発明の名称】制御信号の通信システム
Document Type and Number:
Japanese Patent JP3007224
Kind Code:
B2
Abstract:
PURPOSE:To attain the control for any terminal equipment by ciphering a control signal as required in the operation of a power distribution system or not ciphering the signal for the transmission reception. CONSTITUTION:A sales office 1 is provided with a master station 2, a general terminal data generating section 4 and a mixer section and connected to a slave station 8 via a common use 2-way transmission line TL. A control section 2a of the master station 2 discriminates whether or not a control signal is to be ciphered and ciphering processing 2f or non-ciphering processing 2d is applied to a control signal in response to the result of discrimination. Furthermore, the control section 2a adds display data representing whether or not the control signal is ciphered to the control signal and sends the result. A control signal decoder 9 in the slave station 8 detects display data from the received control signal and discriminates whether or not the control signal is ciphered based on the data. Then the decoding algorithm is decided in response to the result of discrimination and the original control signal is extracted by the algorithm.
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Inventors:
Yoshiro Noguchi
Kazuo Adachi
Kazuo Adachi
Application Number:
JP14207792A
Publication Date:
February 07, 2000
Filing Date:
May 08, 1992
Export Citation:
Assignee:
Mitsubishi Electric Corporation
International Classes:
H04L9/10; H04L9/00; H04L9/12; H04L9/14; H04L9/36; (IPC1-7): H04L9/36
Domestic Patent References:
| JPS60102038A |
Attorney, Agent or Firm:
Hiroaki Tazawa (2 outside)