WDM device, client device, network, system and method for allocating wavelength of WDM to a client signal
AssigneeFujitsu Limited
InventorMasami Doukai
Life of this patent
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Abstract
A WDM (Wavelength Divisional Multiplex) device is provided in which a client signal having a band that is greater than a band of a wavelength used for wavelength-division multiplexing is allocated a plurality of wavelengths and is transmitted as a wavelength-division multiplexed signal. The WDM device includes a used-band detecting part for detecting a used-band that is used by the client signal supplied from a client device. The used-band is detected from a path layer of the client signal using set-up information contained in the path layer of the client signal. The WDM device also includes a mapping part for mapping the detected used-band onto wavelengths used for wavelength-division multiplexing.
Claims16
A WDM (Wavelength Divisional Multiplex) device, wherein a client signal having a band that is greater than a band of a wavelength used for wavelength-division multiplexing is allocated to a plurality of wavelengths and is transmitted as a wavelength-division multiplexed signal, said WDM device comprising:
- a used-band detecting part for detecting a used-band that is used by said client signal supplied from a client device, said used-band being detected from a path layer of said client signal using set-up information contained in said path layer of said client signal;
- a wavelength number determining part for determining the number of the wavelengths used for the wavelength-division multiplexing from said detected used-band;
- and
- a mapping part for mapping said detected used-band onto the wavelengths used for the wavelength-division multiplexing.
A client device, wherein a client signal having a band that is greater than a band of a wavelength used for wavelength-division multiplexing is allocated to a plurality of wavelengths and is transmitted as a wavelength-division multiplexed signal, said client device being capable of supplying set-up information of a path layer of the client signal to a WDM (Wavelength Divisional Multiplex) device and instructing said WDM device to allocate the wavelengths to a client signal, wherein the number of the wavelengths is determined from a used-band that is used by said client signal and that is detected using the set-up information of the path layer of the client signal in said WDM device.
A network, wherein a client signal having a band that is greater than a band of a wavelength used for wavelength-division multiplexing is allocated to a plurality of wavelengths and is transmitted as a wavelength-division multiplexed signal, said network comprising:
- supplying means for supplying set-up information from a client device using a path layer of said client signal;
- mapping means for detecting, in a WDM (Wavelength Divisional Multiplex) device, a used-band that is used by said client signal supplied from the client device, said used-band being detected from the path layer of said client signal using the set-up information contained in said path layer of said client signal wherein the number of the wavelengths used for the wavelength-division multiplexing is determined from said detected used-band, and mapping said detected used-band onto the wavelengths used for wavelength-division multiplexing.
A WDM (Wavelength Divisional Multiplex) device, wherein a client signal having a band that is greater than a band of a wavelength used for wavelength-division multiplexing is allocated to a plurality of wavelengths and is transmitted as a wavelength-division multiplexed signal, said WDM device comprising:
- a signal restoring part for synchronizing the plurality of wavelengths separated from a received wavelength-division multiplexed signal and restoring said received wavelength-division multiplexed signal into a path layer of the original client signal, wherein the number of the wavelengths is determined from a used-band that is used by said client signal and that is detected from a path layer of said client signal in a WDM device that transmits the wavelength-division multiplexed signal.
A system comprising a WDM (Wavelength Divisional Multiplex) device and a client device, wherein a client signal having a band that is greater than a band of a wavelength used for wavelength-division multiplexing is allocated to a plurality of wavelengths and is transmitted as a wavelength-division multiplexed signal, said system comprising a WDM device including:
- a used-band detecting part for detecting a used-band that is used by the client signal supplied from the client device, said used-band being detected from a path layer of said client signal using set-up information contained in said path layer of said client signal;
- a wavelength number determining part for determining the number of the wavelengths used for the wavelength-division multiplexing from said detected used-band;
- and
- a mapping part for mapping said detected used-band onto the wavelengths used for wavelength-division multiplexing.
A method of allocating a client signal having a band that is greater than a band of a wavelength used for wavelength-division multiplexing to a plurality of wavelengths and is transmitted as a wavelength-division multiplexed signal, said method comprising the steps of:
- detecting a used-band that is used by a client signal supplied from a client device, said used-band being detected from a path layer of said client signal using set-up information contained in said path layer of said client signal;
- determining the number of the wavelengths used for wavelength-division multiplexing from said detected used-band;
- and
- mapping said detected used-band onto the wavelengths used for wavelength-division multiplexing.
A method of allocating a client signal having a band that is greater than a band of a wavelength used for wavelength-division multiplexing to a plurality of wavelengths and is transmitted as a wavelength-division multiplexed signal, said method comprising the steps of:
- supplying set-up information of a path layer of the client signal from a client device to a WDM (Wavelength Divisional Multiplex) device;
- and
- instructing from said client device to said WDM device to allocate the wavelengths to the client signal, wherein the number of the wavelengths is determined from a used-band that is used by said client signal and that is detected using the set-up information of the path layer of the client signal in said WDM device.
A method of allocating a client signal having a band that is greater than a band of a wavelength used for wavelength-division multiplexing to a plurality of wavelengths and is transmitted as a wavelength-division multiplexed signal, said method comprising the steps of:
- synchronizing the plurality of wavelengths separated from a received wavelength-division multiplexed signal;
- and
- restoring said wavelength-division multiplexed signal into a path layer of the original client signal, wherein the number of the wavelengths is determined from a used-band that is used by said client signal and that is detected from a path layer of said client signal in a WDM device that transmits the wavelength-division multiplexed signal.
Dependencies are inferred from the claim text.