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AssigneeOki Electric Industry Co., Ltd.
InventorMasahiro SARASHINA
Estimating the term…
In a telecommunications network including an optical line terminal (OLT) having optical subscriber units (OSUs) and an optical network unit (ONU) connected to the OLT, bandwidth allocation signals are periodically transmitted at a first period from the respective OSUs to the ONU, and an acknowledgement request signal is transmitted from at least one of the OSUs to the ONU at a second period having a value corresponding to the first period multiplied by a constant. If an ONU is registered in none of the OSUs, the first period is determined from reception intervals of the assignment signals, and a second period is calculated from the first period. Transmissive wavelength of a variable-wavelength (VW) filter in the ONU is periodically changed at a third period longer than the second period. In the OSU having transmitted the request signal, the unregistered ONU having received the request signal is registered.
A method of registering an unregistered optical network unit (ONU) in a telecommunications network which comprises an optical line terminal (OLT) including a plurality of optical subscriber units (OSUs) and at least one ONU connected to the OLT, the ONU including a variable-wavelength (VW) filter, the plurality of OSUs transmitting a signal on different wavelengths specifically assigned to the respective OSUs, said method comprising:
A telecommunications network comprising an optical line terminal (OLT) including a plurality of optical subscriber units (OSUs) and at least one optical network unit (ONU) connected to said OLT, wherein
An optical network unit (ONU) for use in network communication through a connection to an optical line terminal (OLT), comprising:
Dependencies are inferred from the claim text.