Title:
ABNORMALITY DETECTION SYSTEM
Document Type and Number:
Japanese Patent JP2017022557
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To provide an abnormality detection system capable of identifying an abnormal point of a network in a radio environment in which a network transmission characteristic changes every moment.SOLUTION: The abnormality detection system for detecting an abnormality of a network system is provided. The network system includes: a first relay device which is connected to an external network and a first network; and a second relay device which is connected to a first radio network and a second radio network. The abnormality detection system determines whether or not an abnormality occurs in the first radio network at a certain time and a position indicated by the position specific information of the certain time, on the basis of position specific information indicative of the geographic position of the second relay device at a certain time, and statistic information, including radio state information which includes the reception signal strength and a signal-to-noise ratio, associated with the position specifying information belonging to the same range.SELECTED DRAWING: Figure 1
Inventors:
TAKESHIMA YOSHIAKI
TAKEDA SACHIKO
HAMAGUCHI KAZUKO
TAKEDA SACHIKO
HAMAGUCHI KAZUKO
Application Number:
JP2015138657A
Publication Date:
January 26, 2017
Filing Date:
July 10, 2015
Export Citation:
Assignee:
HITACHI LTD
International Classes:
H04W16/18; H04B17/23; H04B17/26; H04B17/27; H04B17/309; H04W24/08; H04W24/10
Attorney, Agent or Firm:
Fujio Patent Office
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