Title:
DOUBLE-RING TYPE DATA TRANSMISSION METHOD AND TRANSMISSION SYSTEM
Document Type and Number:
Japanese Patent JP3729101
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To prevent transmission delay or packet loss caused by congestion of transmission channel or abnormal condition to ensure a real-time property of data transmission.
SOLUTION: In the double ring type data transmission method in which several nodes 20a, 20b, 20c..., 20n are connected with a transmission channel L10a and a transmission channel R10b, respectively, in ring shapes to transmit data between each node 20a, 20b, 20c..., 20n using the channel L10a as an active channel and the channel R10b for a standby channel, base transmission time for packets between each node 20a, 20b, 20c..., 20n are defined. If transmission time for packets sent from each node 20a, 20b, 20c..., 20n is longer than the base transmission time, the channel between the transmitter node and the receiver node of the relevant packets are switched to the standby channel R10b from the active channel L10a.
Inventors:
Satoshi Manabe
Application Number:
JP2001252047A
Publication Date:
December 21, 2005
Filing Date:
August 22, 2001
Export Citation:
Assignee:
NEC
International Classes:
H04L12/437; (IPC1-7): H04L12/437
Domestic Patent References:
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Attorney, Agent or Firm:
Kihei Watanabe