| 摘要 |
<p>The present invention refers to a method for compensating, within a node of an optical network, chromatic dispersion undergone by optical packets transmitted within time slots of wavelength division multiplexed channels along at least one link (4, 22) of the optical network, a time slot duration (DeltaTau) corresponding to the sum of a packet duration (tp) and an inter-packet gap duration (Deltat), the said method comprising the folio wings steps: - demultiplexing the wavelength division multiplexed channels into a plurality of bands (B), a band (B) comprising a predetermined number of adjacent wavelength channels (lambda), - transmitting the said plurality of bands (B), via a respective plurality of delay lines (13) having predetermined delays, toward a respective plurality of packet add/drop structures (11) comprising a coherent receiver (25), wherein the said predetermined number of channels of one band is determined so that a first time shift, due to the effect of the chromatic dispersion along transmission through the network, between two optical packets of the same time slot sent respectively in different channels of the same band, remains shorter than an inter-packet gap duration (Deltat) and so that the coherent receiver (25) is capable of processing the said predetermined number of channels of one band, wherein the predetermined delay of a delay line (13) associated with a band of channels corresponds to a second time shift between a channel of the said associated band and a reference channel (lambda65), the said second time shift being due to the effects of chromatic dispersion along the last crossed link (4).</p> |
