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US 9,806,892 B2Granted
Optical network unit power management in passive optical networks
AssigneesZte Corporation, ZTE (USA) Inc.
InventorsDenis Andreyevich Khotimsky, LiQuan Yuan, DeZhi Zhang
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Abstract
Techniques for unified optical network unit power management in a passive optical network include operating an optical network unit (ONU) in a first state in which a transmitter of the ONU is turned off and a receiver of the ONU is turned on, operating the ONU in a second state in which both the transmitter and the receiver are turned off, and transitioning the ONU directly between the first state and the second state, based on a power management rule.
Claims15
A method of optical communication in a passive optical network, comprising:
- operating an optical network unit (ONU) in a first state in which a transmitter of the ONU is turned off and a receiver of the ONU is turned on;
- operating the ONU in a second state in which both the transmitter and the receiver are turned off;
- transitioning the ONU directly from the first state to the second state and transitioning the ONU directly from the second state to the first state, based on a power management rule;
- ensuring the ONU is fully powered up, synchronized, and capable of responding to both upstream and downstream traffic and control before exiting the first state or the second state;
- and
- receiving, by the receiver, a power management message from an optical line terminal (OLT);
- and
- changing the power management rule based on the received power management message.
5 more elements
An optical communication apparatus in a passive optical network, comprising:
- means for operating an optical network unit (ONU) in a first state in which a transmitter of the ONU is turned off and a receiver of the ONU is turned on;
- means for operating the ONU in a second state in which both the transmitter and the receiver are turned off;
- means for transitioning the ONU directly from the first state to the second state and means for transitioning the ONU directly from the second state to the first state, based on a power management rule;
- means for ensuring the ONU is fully powered up, synchronized, and capable of responding to both upstream and downstream traffic and control before exiting the first state or the second state;
- and
- means for receiving, by the receiver, a power management message from an optical line terminal;
- and
- means for changing the power management rule based on the received power management message.
5 more elements
An optical communication apparatus, comprising:
- a memory that stores processor-executable instructions;
- and
- a processor that uses the stored instructions to implement a method, comprising operating an optical network unit (ONU) in a first state in which a transmitter of the ONU is turned off and a receiver of the ONU is turned on;
- and operating the ONU in a second state in which both the transmitter and the receiver are turned off;
- and
- wherein the processor includes means for transitioning the ONU directly from the first state to the second state and means for transitioning the ONU directly from the second state to the first state, based on a power management rule;
- wherein the processor uses stored instructions to ensure the ONU is fully powered up, synchronized, and capable of responding to both upstream and downstream traffic and control before exiting the first state or the second state;
- and
- wherein the processor further uses the stored instructions to implement the method by receiving, by the receiver, a power management message from an optical line terminal (OLT) and changing the power management rule based on the received power management message.
6 more elements
An optical line terminal (OLT) for operation in a passive optical network (PON), the optical line terminal comprising:
- a processor configured to generate messages for controlling a transition of an optical network unit from a first low power state in which a receiver of the optical network unit is turned on but a transmitter of the optical network unit is turned off to a second low power state in which both the receiver and the transmitter of the optical network unit are turned off;
- a transmitter configured to transmit the generated messages to the optical network unit;
- wherein the generated messages comprises a periodic consent message to allow the optical network unit to remain in either the first low power state or the second low power state.
A passive optical network (PON) communications system, comprising:
- an optical network unit (ONU) operable in a first low power mode in which the ONU is able to receive but not transmit and a second low power mode in which the ONU is not able to either receive or transmit, wherein the ONU is configured to transition from the first low power mode to the second low power mode and to transition from the second low power mode to the first low power mode based on a power management rule, and wherein the ONU changes a power management rule based on a received power management message;
- an optical line terminal (OLT) communicably coupled to the ONU, the OLT configured to transmit a control message to the ONU to control at least one aspect of transition of the ONU between the first low power mode and the second low power mode;
- and
- the ONU configured to ensure that the ONU is fully powered up, synchronized, and capable of responding to both upstream and downstream traffic and control before exiting the first low power mode or the second low power mode.
1 more element
Dependencies are inferred from the claim text.