ADVA Optical Networking

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The present invention provides a performance monitoring device, an optical signal network with performance monitoring, and a performance monitoring method. The performance monitoring device (100) comprises a coherent receiver (10), an analog-to-digital-converter, ADC (20), a digital signal processing module, DSPM (30), and a noise correction module, NCM (40),the receiver (10) having a second bandwidth that is smaller than the first bandwidth (BW1) such that the receiver (10) is configured to output an electrical analog signal (72) with the second bandwidth based on the received optical signal (71) having the first bandwidth,the ADC (20), being configured to generate from the electric analog signal (72) a digital input signal (73) with the second bandwidth ;the DSPM (30) being configured to generate a raw performance monitoring metric, RPMM (74), based on the digital input signal (73);wherein the NCM (40) is configured to generate a performance monitoring metric, PMM (75), based on the digital input signal (73) by compensating distortion in the RPMM (74) caused by the coherent receiver (10) having a smaller bandwidth than the optical signal (71).

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The present invention relates to a method for optimizing performance of a multi-span optical fiber network, wherein each span has an associated optical transmission fiber connected to an associated optical amplifier, wherein gain and output power of the associated optical amplifier are respectively controlled independently, and wherein an amplifier noise figure respectively depends on the gain of the associated optical amplifier wherein each associated optical amplifier is further connected to launch optical signals into a remainder of a corresponding optical transmission line, and wherein the method (20) comprises the steps of:- for each span, computing the amplifier noise figure and a non-linear noise generated in the span based on information about the span (21) and using the computed amplifier noise figure and the computed non-linear noise to compute an optimum launch power (22);- optimizing performance of the multi-span optical fiber network based on the computed optimum launch powers of all spans (23,24).

There is provided a technique of time-sensitive transmission of Ethernet traffic between source and destination nodes in IET-blind network. The source network node receives expedited and non-expedited Ethernet frames; for each non-expedited Ethernet frame: detects a pre-provisioned designated non-expedited tunnel; segments non-expedited Ethernet frame into a plurality of segments; encapsulates each segment in accordance with the designated non-expedited tunnel, wherein each encapsulated segment comprises a metadata structure added (inserted, prepended or postpended) to a payload and usable for further reassembling the frame at the destination endpoint, and wherein the metadata structure is informative, at least, of sequence numbers of the frame and the given segment and a type of segment indicative of a relative location of the given segment within a sequence of segments from the plurality of segments; and sends the encapsulated segments to the destination network node via the designated non-expedited tunnel.

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The present invention refers to a system installed in a cross-border area between a public network (120) of a provider and a carriers carrier network (110) of a customer, the system comprises at least:- a smart optical network termination device, NT, (10) that sits on a site of the customer and implements a demarcation point between the customer network (110) and the provider network (120),- a monitoring unit, MU, (20) located at a point of presence, PoP, (122) of the provider network (120),wherein the smart optical NT (10) is configured to monitor a coupling of optical power by the customer into the provider network (120) and to interact with the MU (20) via at least one traffic analysis point, TAP, (31, 32) for connectivity validation from the PoP (122) to the demarcation point (10).The present invention also refers to a respective method.