Title:
【発明の名称】ネットワーク監視支援装置
Document Type and Number:
Japanese Patent JP3011925
Kind Code:
B1
Abstract:
PROBLEM TO BE SOLVED: To detect and analyze a transmission fault on a network in real time at a physical layer level during a network operation. SOLUTION: Near the respective terminating resistors 10a and 10b of a bus 10, fault monitor support devices 11a and 11b are connected. At the time of detecting a packet transmitted through the bus 10, one fault monitor support device 11b transmits position detection pulses for detecting the packet origin position to the other fault monitor support device 11a. The other fault monitor support device 11a fetches a bit string from the bus 10, detects the various kinds of diagnostic parameters based on the signal waveform and specifies a fault factor from the combination of the diagnostic parameters. Also, the packet origin position is detected based on the time from packet reception to position detection pulse reception and it is outputted together with the fault factor. Further, a cable test is executed corresponding to the value of the diagnostic parameter and the test result is outputted.
Inventors:
Masahiko Kurata
Naoyoshi Machida
Eiji Watanabe
Motozumi Kumazaki
Naoyoshi Machida
Eiji Watanabe
Motozumi Kumazaki
Application Number:
JP26445098A
Publication Date:
February 21, 2000
Filing Date:
September 18, 1998
Export Citation:
Assignee:
Hitachi Electronics Services Co., Ltd.
International Classes:
H04L69/40; H04L12/28; (IPC1-7): H04L12/28; H04L12/24; H04L12/26; H04L29/14
Domestic Patent References:
| JP1127308A | ||||
| JP9307570A | ||||
| JP8331151A | ||||
| JP8254557A | ||||
| JP63201527A | ||||
| JP61224635A |
Other References:
【文献】1994年電子情報通信学会秋季大会-ソサイエティ先行大会-講演論文集,通信2,B-623,田口拓哉 他「ネットワーク・トラブル診断システムの検討」
【文献】1991年電子情報通信学会春季全国大会講演論文集,通信[分冊3],B-658,新内浩介他「ネットワーク障害診断機能と診断知識の検討」
【文献】1991年電子情報通信学会春季全国大会講演論文集,通信[分冊3],B-658,新内浩介他「ネットワーク障害診断機能と診断知識の検討」
Attorney, Agent or Firm:
Kazuko Tomita (1 outside)