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Title:
通信ノードおよび通信システムのリング確立確認方法
Document Type and Number:
Japanese Patent JP4778056
Kind Code:
B2
Abstract:
A plurality of communication nodes are one-to-one connected to each other by Ethernet (registered trademark) which is duplicated with a normal-system ring and with a standby-system ring. The communication node includes an A port, a B port, and a communication processor that performs a process of receiving a frame output from the B port and a process of transmitting the frame from the normal-system ring from the B port when the communication is normal. When other communication node performs a loop-back process due to communication abnormality, the communication node performs only a process of forwarding a frame input from the standby-system ring in the B port without receiving the frame and performs a process of transmitting the frame from the A port to the standby-system ring.

Inventors:
中村 真人
Application Number:
JP2008522271A
Publication Date:
September 21, 2011
Filing Date:
June 30, 2006
Export Citation:
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Assignee:
三菱電機株式会社
International Classes:
H04L12/437
Domestic Patent References:
JP2000278306A2000-10-06
JPS62169543A1987-07-25
JPS6276949A1987-04-09
JPS60236543A1985-11-25
JPS58220538A1983-12-22
JPS58111454A1983-07-02
JP2005210279A2005-08-04
Attorney, Agent or Firm:
酒井 宏明



 
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