Telecom Italia S.p.a.

Politecnico Di Torino

Roberto Mercinelli

Maurizio Valvo

Roberto Gaudino

Paolo Solina

Valter Ferrero

Alessandro Capurso

Marcello Valentini

A method for activating an ONU in a multi-wavelength PON. Other ONUs may be already active and transmit upstream signals to the OLT on various upstream channels. The new ONU transmits an activation signal superimposed to such upstream signals. Since the ONU may include an uncalibrated tunable transmitter, initially the activation signal wavelength might be different from that upon which the ONU shall be activated. The activation signal optical power is lower than the other upstream signals, so as not to impair their reception at the OLT. The OLT operates the ONUs already active on the upstream channel on which the new ONU shall be activated to suspend transmission for one or more time gaps, during which the OLT detects the activation signal. This improves activation signal detection conditions, thereby allowing to increase its bitrate. An acceptable duration of the activation procedure can then be achieved.

Activation of an optical network unit in a multi-wavelength passive optical network

A method for localizing an optical network termination in an optical access network including an optical line termination and a number of optical links. The method includes: detecting that the optical network termination is connected to an optical link and retrieving from it a termination identifier univocally identifying the optical network termination, using the termination identifier for retrieving an optical link identifier associated with the termination identifier and univocally identifying a given optical link of the optical links; inducing a change in an optical connection between the optical line termination and the given optical link, thus modifying an optical parameter of first optical signals received at the optical line termination through the given optical link; checking whether second optical signals received at the optical line termination from the optical network termination are affected by the change; and in the affirmative, determining that the optical network termination is connected to the first optical link.

Method for localizing an optical network termination in an optical access network

A method of transmitting data packets through a passive optical network. The method includes: receiving a first data packet from a first interface of the passive optical network, the first data packet including precedence information; encapsulating the first data packet in a second data packet at the first interface; and transmitting the second data packet through the passive optical network toward a second interface, wherein encapsulating includes inserting in a header field of the second data packet a value indicative of the precedence information. The value indicative of the precedence information could include a priority and/or a virtual LAN identifier.

Method for transmitting data packets with different precedence through a passive optical network

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Turin, Italy

Roberto Mercinelli