METHOD OF TUNING WAVELENGTH OF TUNABLE OPTICAL NETWORK UNIT (ONU) IN TIME AND WAVELENGTH DIVISION MULTIPLEXING-PASSIVE OPTICAL NETWORK (TWDM-PON)
First Claim
1. A method of tuning a wavelength of a tunable optical network unit (ONU) in a time and wavelength division multiplexing-passive optical network (TWDM-PON), the method comprising:
- transmitting a wavelength change request message from a source optical line terminal (OLT) to request the ONU to change a wavelength thereof from a first wavelength through which the source OLT provides a service to the ONU to a second wavelength through which a target OLT provides a service; and
in response to the wavelength change request message, transmitting a wavelength change response message from the ONU to the source OLT to indicate whether or not the ONU can change a wavelength thereof,wherein the wavelength change request message contains one of the following;
a system ONU identification (ID), a channel ONU ID, and individual ONU ID, as identification information for specifying an ONU that is requested to change a wavelength thereof.
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Abstract
A method of tuning a wavelength of a tunable ONU in a TWDM-PON is provided. The method includes transmitting a wavelength change request message from a source OLT to request the ONU to change a wavelength thereof from a first wavelength to a second wavelength and in response to the wavelength change request message, transmitting a wavelength change response message from the ONU to the source OLT to indicate whether or not the ONU can change a wavelength thereof. The wavelength change request message is ID information for specifying an ONU that is requested to change a wavelength thereof, and the message may comprise one of the following: system ONU ID, channel ONU ID, and individual ONU ID.
40 Citations
12 Claims
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1. A method of tuning a wavelength of a tunable optical network unit (ONU) in a time and wavelength division multiplexing-passive optical network (TWDM-PON), the method comprising:
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transmitting a wavelength change request message from a source optical line terminal (OLT) to request the ONU to change a wavelength thereof from a first wavelength through which the source OLT provides a service to the ONU to a second wavelength through which a target OLT provides a service; and in response to the wavelength change request message, transmitting a wavelength change response message from the ONU to the source OLT to indicate whether or not the ONU can change a wavelength thereof, wherein the wavelength change request message contains one of the following;
a system ONU identification (ID), a channel ONU ID, and individual ONU ID, as identification information for specifying an ONU that is requested to change a wavelength thereof. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A method of tuning a wavelength of a tunable ONU in a TWDM-PON, the method comprising:
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transmitting a wavelength change request message from a source OLT to request the ONU to change a wavelength thereof from a first wavelength through which the source OLT provides a service to the ONU to a second wavelength through which a target OLT provides a service; in response to the wavelength change request message, transmitting a wavelength change response message from the ONU to the source OLT to indicate whether or not the ONU can change a wavelength thereof; and in response to receiving the wavelength change response message, periodically transmitting a wavelength change confirm message and upstream time allocation information from the source OLT and the target OLT, wherein the wavelength change response message contains wavelength tuning time information of the ONU, and the source OLT and the target OLRT each adaptively determine their intervals at which to transmit the wavelength change confirm message and the upstream time allocation information based on the wavelength tuning time information.
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Specification