US 8,559,814 B2 · Optical communication device and power-saving control method of optical communication device

Abstract

A power-saving mode flag generating unit 101e sets a power-saving mode flag to active (non power-saving mode, turning on the power-source) when it receives a reset signal from a MAC unit 102. Furthermore, the power-saving mode flag generating unit 101e sets the power-saving mode flag to sleep (power-saving mode, turning off the power source) in accordance with a signal-interrupt detection signal obtained by the signal-interrupt detecting unit 101f1 of the packet monitoring unit 101f. Depending on the state of a packet, the power-saving mode flag generating unit 101e changes the power-saving mode flag to active or sleep for the data communication area of the packet; however, for the ranging area of the packet, the power-saving mode flag generating unit 101e always sets the power-saving mode flag to active. A pattern discriminating unit 101g discriminates between the data communication area and the ranging area of the packet.

Claims10

Dependent claims

A carrier-side optical communication device that is connected to a plurality of subscriber-side optical communication devices and that performs two-way communication with the subscriber-side optical communication devices in an optical communication system, the carrier-side optical communication device comprising:

a packet monitor that monitors the presence or absence of a packet that is transmitted from the subscriber-side optical communication devices;
a packet discriminator that discriminates between a delay measurement packet and a packet other than the delay measurement packet among packets transmitted from the subscriber-side optical communication devices;
a power-saving mode flag generator that generates a power-saving mode flag for the carrier-side optical communication device in accordance with the presence or absence of the packet that is monitored by the packet monitor and a discrimination result by the packet discriminator;
and
a power-saving controller that controls saving of power of the carrier-side optical communication device in accordance with the power-saving mode flag generated by the power-saving mode flag generator, wherein
when the packet discriminator determines that a packet transmitted from the subscriber-side optical communication devices is the delay measurement packet, the power-saving mode flag generator generates a power-saving mode flag so that the power-saving controller does not control the saving of power.

3 more elements

A power-saving control method performed by a carrier-side optical communication device that is connected to a plurality of subscriber-side optical communication devices and that performs two-way communication with the subscriber-side optical communication devices in an optical communication system, the power-saving control method comprising:

monitoring the presence or absence of a packet that is transmitted from the subscriber-side optical communication devices;
discriminating between a delay measurement packet and a packet other than the delay measurement packet among packets transmitted from the subscriber-side optical communication devices;
generating a power-saving mode flag for the carrier-side optical communication device in accordance with the presence or absence of the packet that is monitored at the monitoring and a discrimination result at the discriminating;
and
controlling saving of power of the carrier-side optical communication device in accordance with the power-saving mode flag generated at the generating, wherein
the generating includes generating a power-saving mode flag by which power-saving control is not performed at the controlling, when it is determined at the discriminating that a packet transmitted from the subscriber-side optical communication devices is the delay measurement packet.

3 more elements

Dependencies are inferred from the claim text.

Optical communication device and power-saving control method of optical communication device

Life of this patent

Optical communication device and power-saving control method of optical communication device

Life of this patent

Abstract

Claims10