Title:
DATA COMMUNICATION SYSTEM
Document Type and Number:
Japanese Patent JP3523472
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To continue communication even when an event occurs to temporarily interrupt the communication with a data communication terminal of a communicating party.
SOLUTION: In a state transition diagram showing a state transition of communication with a data communication terminal at the data communication terminal control part of a data communication switching station, first of all, the data communication terminal control part communicates with a data communication terminal part and the signal transmission/reception part of the data communication switching station. Such a state is a normal communication state S110. Even when the communication of a signal from the signal transmission/reception part fails at such a time, it is controlled into one-time failure state S112 as a state under communication. Even when the communication again fails, it becomes a twice-failure state S114. When the communication fails three times, it becomes an idle state S200. Thus, even when the fail of signal transmission to the data communication terminal is reported from the signal transmission/reception part, the data communication terminal control part holding the state under communication with the data communication terminal continues the communication state with the data communication terminal.
Inventors:
Sasada, Koji
Onuki, Masafumi
Nakamura, Katsushi
Hirata, Shoichi
Onuki, Masafumi
Nakamura, Katsushi
Hirata, Shoichi
Application Number:
JP35040297A
Publication Date:
April 26, 2004
Filing Date:
December 19, 1997
Export Citation:
Assignee:
NTT MOBIL COMMUN NETWORK INC
International Classes:
H04L29/08; H04L12/70; (IPC1-7): H04L29/08; H04L12/56
Attorney, Agent or Firm:
谷 義一 （外１名）
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