COMMUNICATION SYSTEM, DATA RECEIVER, DATA REPEATER, MANAGEMENT DEVICE, AND DATA TRANSMITTER/RECEIVER AND COMMUNICATION METHOD

COMMUNICATION SYSTEM, DATA RECEIVER, DATA REPEATER, MANAGEMENT DEVICE, AND DATA TRANSMITTER/RECEIVER AND COMMUNICATION METHOD

PROBLEM TO BE SOLVED: To reduce the communication traffics and load when joining or leaving a multicast group. SOLUTION: The clients 40a-40d start waiting before the time of inquiries about the subscription to a multicast group. The access router 30a sends inquiries at the time set for inquiries abo...

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Bibliographische Detailangaben
Hauptverfasser: ISHIKAWA NORIHIRO, SUZUKI HIDEMOTO, TANAKA KIYOKO, UENO HIDETOSHI, HARASHITA TAKASHI
Format: Patent
Sprache:eng
Schlagworte:
ELECTRIC COMMUNICATION TECHNIQUE
ELECTRICITY
TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHICCOMMUNICATION
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Zusammenfassung:PROBLEM TO BE SOLVED: To reduce the communication traffics and load when joining or leaving a multicast group. SOLUTION: The clients 40a-40d start waiting before the time of inquiries about the subscription to a multicast group. The access router 30a sends inquiries at the time set for inquiries about the subscription to the multicast group to find if any clients desire to receive the data. Or the clients 40a-40d keeps waiting before the time of inquiries about the cancellation of the subscription to the multicast group. The access router 30a sends inquiries at the time set for inquiries about the cancellation of the subscription to a multicast group to find if any clients desire to cancel the subscription to the multicast group. COPYRIGHT: (C)2005,JPO&NCIPI