COMMUNICATION SYSTEM

WIPO Patent Application WO/2005/122424

A1

There is provided a communication system including a plenty of nodes almost without lowering the transfer rate. The communication system includes: a first communication system using an existing multi-branch cabled electric communication network (50) as a signal transmission path; a second communication system using the wiring (10) distributed to each of the homes (2A, 2B, …) as a signal transmission path; and signal relay means (20) for performing communication between the two systems. The first communication system has a first PLC modem (11) connected to an upper-node network (300) in a communication main line (52a). The second communication system has a second PLC modem (12) in the wiring (10). The signal relay means (20) performs communication to/from the first PLC modem (11) and to/from the second PLC modem (12). By using the signal relay means (20), it is possible to perform communication between the different signal transmission paths.

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MATSUO TAKASHI (JP)
KAWAMOTO KOJI (JP)
HIROTSU KENICHI (JP)
SHIMOGUCHI TAKEFUMI (JP)
ASAO YOSHIHISA (JP)
YADA KATSUHIRO (JP)

PCT/JP2005/010809

December 22, 2005

June 13, 2005

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SUMITOMO ELECTRIC INDUSTRIES (JP)
MATSUO TAKASHI (JP)
KAWAMOTO KOJI (JP)
HIROTSU KENICHI (JP)
SHIMOGUCHI TAKEFUMI (JP)
ASAO YOSHIHISA (JP)
YADA KATSUHIRO (JP)

H04B3/58; (IPC1-7): H04B3/58

JP2003347973A

2003-12-05

Naito, Teruo (7-13 Nishi-Shimbashi 1-chome, Minato-k, Tokyo ., JP)

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