PASSIVE OPTICAL NETWORK SYSTEM AND SLEEP TIME DETERMINATION METHOD

PROBLEM TO BE SOLVED: To select maximally long sleep time while preventing omission of data.SOLUTION: Low power consumption operation of an ONU with preventing omission of data is implemented in a PON system by selecting sleep time on the basis of referring link speed and queue buffer capacity of ea...

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Bibliographische Detailangaben
Hauptverfasser:	KONNO SATOSHI, KAMIJO KAKU, OSAWA NOBORU
Format:	Patent
Sprache:	eng
Schlagworte:	CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION ANDCOMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION ANDCOMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THIR OWNENERGY USE ELECTRIC COMMUNICATION TECHNIQUE ELECTRICITY GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS SELECTING TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINSTCLIMATE CHANGE TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHICCOMMUNICATION
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Beschreibung
Zusammenfassung:	PROBLEM TO BE SOLVED: To select maximally long sleep time while preventing omission of data.SOLUTION: Low power consumption operation of an ONU with preventing omission of data is implemented in a PON system by selecting sleep time on the basis of referring link speed and queue buffer capacity of each of an OLT and the ONU. The OLT determines a first sleep time candidate based on idle capacity of a first queue buffer part retaining downlink data for each of the destination ONU and first link speed communicating with a high-order network. The ONU determines a second sleep time candidate based on idle capacity of a second queue buffer part retaining uplink data to the OLT and second link speed communicating with a communication terminal. One of the OLT or the ONU compares the first sleep time candidate and the second sleep time candidate of at least one of the ONUs and designates the smaller of the candidates as execution sleep time for making the ONU be a sleep state.