POWER CONTROL IN AN OPTICAL NETWORK UNIT
First Claim
1. A method of power control in an Optical Network Unit (ONU), the ONU having an optical transmitter coupled to a power controller, the method comprising:
- controlling a supply of power in accordance with information defining a plurality of transmission windows during which data can be transmitted from the ONU, to provide power to an optical transmitter in the ONU beginning at a predetermined time in advance of a transmission window of the plurality of transmission windows to ensure a laser in the optical transmitter is ready to begin transmitting the data at the start of the transmission window;
controlling the supply of power in accordance with the information to refrain from providing full power to the optical transmitter during a period of time between the end of the transmission window and the start of a next transmission window of the plurality of transmission windows, when the duration of time between the end of the transmission window and the start of the next transmission window is greater than a predetermined length.
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Accused Products
Abstract
There are disclosed techniques for power control in an Optical Network Unit (ONU) of a Passive Optical Network (PON). In one embodiment, the supply of power to an optical transmitter is controlled in accordance with information defining a plurality of transmission windows during which data can be transmitted from the ONU, in order to achieve the following: (1) to provide power to the optical transmitter beginning at a predetermined time in advance of a transmission window to ensure a laser in the optical transmitter is ready to begin transmitting the data at the start of the transmission window; and (2) to refrain from providing full power to the optical transmitter between transmission windows when the duration of time between the transmission windows is greater than a predetermined length.
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Citations
27 Claims
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1. A method of power control in an Optical Network Unit (ONU), the ONU having an optical transmitter coupled to a power controller, the method comprising:
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controlling a supply of power in accordance with information defining a plurality of transmission windows during which data can be transmitted from the ONU, to provide power to an optical transmitter in the ONU beginning at a predetermined time in advance of a transmission window of the plurality of transmission windows to ensure a laser in the optical transmitter is ready to begin transmitting the data at the start of the transmission window; controlling the supply of power in accordance with the information to refrain from providing full power to the optical transmitter during a period of time between the end of the transmission window and the start of a next transmission window of the plurality of transmission windows, when the duration of time between the end of the transmission window and the start of the next transmission window is greater than a predetermined length. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. An Optical Network Unit (ONU) comprising:
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an optical transmitter having a laser; a power controller for; controlling a supply of power in accordance with information defining a plurality of transmission windows during which data can be transmitted from the ONU, to provide power to the optical transmitter beginning at a predetermined time in advance of a transmission window of the plurality of transmission windows to ensure the laser is ready to begin transmitting the data at the start of the transmission window; controlling the supply of power in accordance with the information to refrain from providing full power to the optical transmitter during a period of time between the end of the transmission window and the start of a next transmission window of the plurality of transmission windows, when the duration of time between the end of the transmission window and the start of the next transmission window is greater than a predetermined length. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16)
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17. A computer readable medium having stored thereon computer readable instructions for performing a method of power control in an Optical Network Unit (ONU), the computer readable instructions including instructions for performing operations comprising:
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controlling a supply of power in accordance with information defining a plurality of transmission windows during which data can be transmitted from the ONU, to provide power to an optical transmitter in the ONU beginning at a predetermined time in advance of a transmission window of the plurality of transmission windows to ensure a laser in the optical transmitter is ready to begin transmitting the data at the start of the transmission window; controlling the supply of power in accordance with the information to refrain from providing full power to the optical transmitter during a period of time between the end of the transmission window and the start of a next transmission window of the plurality of transmission windows, when the duration of time between the end of the transmission window and the start of the next transmission window is greater than a predetermined length. - View Dependent Claims (18, 19, 20, 21, 22, 23, 24)
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25. A Passive Optical Network (PON) comprising an Optical Line Terminator (OLT) in communication with a plurality of Optical Network Units (ONUs), wherein at least one ONU of the plurality of ONUs comprises:
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an optical transmitter having a laser; a power controller for; controlling a supply of power in accordance with information defining a plurality of transmission windows during which data can be transmitted from the ONU, to provide power to the optical transmitter beginning at a predetermined time in advance of a transmission window of the plurality of transmission windows to ensure the laser is ready to begin transmitting the data at the start of the transmission window; controlling the supply of power in accordance with the information to refrain from providing full power to the optical transmitter during a period of time between the end of the transmission window and the start of a next transmission window of the plurality of transmission windows, when the duration of time between the end of the transmission window and the start of the next transmission window is greater than a predetermined length.
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26. A multipoint control protocol (MPCP) engine for use in an Optical Network Unit (ONU), the MPCP engine comprising a power controller for:
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controlling a supply of power in accordance with information defining a plurality of transmission windows during which data can be transmitted from the ONU, to provide power to an optical transmitter in the ONU beginning at a predetermined time in advance of a transmission window of the plurality of transmission windows to ensure a laser in the optical transmitter is ready to begin transmitting the data at the start of the transmission window; controlling the supply of power in accordance with the information to refrain from providing full power to the optical transmitter during a period of time between the end of the transmission window and the start of a next transmission window of the plurality of transmission windows, when the duration of time between the end of the transmission window and the start of the next transmission window is greater than a predetermined length.
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27. An Optical Network Unit (ONU) comprising:
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an optical transmitter having a laser; a supply of power; means for controlling the supply of power in accordance with information defining a plurality of transmission windows during which data can be transmitted from the ONU, to provide power to the optical transmitter beginning at a predetermined time in advance of a transmission window of the plurality of transmission windows to ensure the laser is ready to begin transmitting the data at the start of the transmission window; and means for controlling the supply of power in accordance with the information to refrain from providing full power to the optical transmitter during a period of time between the end of the transmission window and the start of a next transmission window of the plurality of transmission windows, when the duration of time between the end of the transmission window and the start of the next transmission window is greater than a predetermined length.
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Specification