CONTINUITY TEST METHOD AND NETWORK SYSTEM

Japanese Patent JP2010130479

A

To perform an end-end continuity characteristic test without using a measurement instrument and without providing advanced test functions to a user access device.

The system has a test function in a relay device which constitutes a relay network wherein a plurality of user access devices are multiplexed. An end-end continuity characteristic test is performed using the relay device as a test starting point. The relay device sends a test frame to one user access device, and the user access device loops back the test frame to the same port. The relay device transmits the loopback test frame, and transfers the test frame to an opposed user access device. The opposed user access device returns the test frame to the same port. The relay device which is a test starting point terminates the test frame which is looped back again from the opposed user access device. Throughput and a delay time are calculated based on information contained in the test frame.

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UEDA YASUSUKE
ENDO HIDEKI
TAKASE MASAYOSHI
SUGANO TAKAYUKI
ASHI MASAHIRO
NAKANISHI KAZUYA
SASAKURA YOSHIAKI
FUNABASHI TETSUYA
SUGIYAMA HIROKI
TSUKAMOTO KATSUHIKO
HIRAKAWA HIROKI
SAITO MASAHIRO

JP2008304434A

June 10, 2010

November 28, 2008

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HITACHI LTD
NTT COMM KK

H04L69/40; H04L12/28

JP2005184510A	2005-07-07
JP2006101170A	2006-04-13
JP2005184510A	2005-07-07

WO2007077923A1

2007-07-12

Masaki Goto
Masahiro Fujii
Masaaki Iida

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