US Pat. No. 9,467,316

METHOD AND DEVICE FOR TRANSMITTING A LOW-FREQUENCY SIGNAL OVER A DATA TRANSMISSION LINK USING A DIGITAL HIGH BIT-RATE SIGNAL

Adva Optical Networking S...

1. A method for transmitting a modulating frequency signal over a data transmission link using a processed digital signal,
the method comprising the steps of:
(a) creating a modulated processed digital signal, an average power of which varies according to the modulating frequency
signal,

(b) supplying the modulated processed digital signal to a first end of the data transmission link,
(c) receiving the modulated processed digital signal at a second end of the data transmission link or at an intermediate node
of the data transmission link, and

(d) detecting the modulating frequency signal by low-pass filtering the received modulated processed digital signal,
wherein
(e) the variation of the average power of the modulated processed digital signal is effected by a variation of the density
of bits according to the modulating frequency signal.

US Pat. No. 9,294,192

METHOD, SYSTEM, AND TRANSCEIVER DEVICE FOR BI-DIRECTIONALLY TRANSMITTING DIGITAL OPTICAL SIGNALS OVER AN OPTICAL TRANSMISSION LINK

ADVA Optical Networking S...

1. A method for bi-directionally transmitting digital optical signals over an optical transmission link, the method including:
(a) supplying a first optical transmit signal at a predetermined optical wavelength to a first end of the optical transmission
link and transmitting the first optical transmit signal in a first transmission direction to a second end of the optical transmission
link, the first optical transmit signal being created according to a non-return-to-zero first binary digital signal and comprising
an optical bit-interleaved seeding signal having a symbol rate equal to a bit rate of the first binary digital signal and
wherein the symbol interval of the optical bit-interleaved seeding signal is divided into two equally long sub-intervals,
the bit information of the first binary digital signal being transported in a first of the two sub-intervals and the second
sub-intervals being set to a seeding level with respect to optical power of the first optical transmit signal; and

(b) supplying a second optical transmit signal at the predetermined optical wavelength to the second end of the optical transmission
link and transmitting the second optical transmit signal in a second transmission direction to the first end of the optical
transmission link, the second optical transmit signal being created by creating an optical wavelength reuse signal using the
first optical transmit signal received at the second end of the optical transmission link, the optical wavelength reuse signal
being modulated according to a second digital signal in such a way that the bit information of the second digital signal is
included in the second sub-intervals of the symbol interval of the first optical transmit signal.

US Pat. No. 9,197,349

METHOD OF OPERATING A PRIMARY OPTICAL NODE AND A SECONDARY OPTICAL NODE

ADVA OPTICAL NETWORKING S...

1. A method of operating a primary optical node, particularly an optical line terminal, (OLT), for an optical communications
system wherein said OLT is configured to receive at least one upstream optical signal from at least one secondary optical
node, particularly optical networking unit (ONU) within at least a first wavelength range, and to transmit at least one downstream
optical signal to said at least one ONU within at least a second wavelength range, wherein said OLT:
determines a currently unused wavelength subrange within said first wavelength range identifying at least a highest and lowest
currently unused wavelength in the subrange;

assigns a specific target wavelength within said currently unused wavelength subrange to said ONU;
signals said target wavelength to said ONU;
receives an upstream signal from said ONU; and
provides feedback information to said ONU which comprises information on an indication whether said actual wavelength of said
upstream optical signal is within the subrange with respect to the target wavelength.

US Pat. No. 9,407,574

USING SERDES LOOPBACKS FOR LOW LATENCY FUNCTIONAL MODES WITH FULL MONITORING CAPABILITY

ADVA Optical Networking S...

1. A signal processing apparatus comprising bidirectional high speed ports connected via an integrated high speed serial switch
fabric and serializer/de-serializer circuits to an internal processing logic,
wherein said high speed serial switch fabric is adapted to switch a serial reception signal received by a high speed port
to at least one other high speed port of said apparatus in addition to connections with a parallel domain of said high speed
ports, and

wherein each bidirectional high speed port comprises at least one internal loopback signal path provided to loop a signal
received by its reception port directly back to its transmission port in response to an internal control signal repurposed
for use as a low latency functional path, wherein the reception port of each bidirectional high speed port comprises a clock
and data recovery circuit receiving the serial reception signal and supplying the respective serializer/de-serializer circuit
of said bidirectional high speed port with a recovered clock signal and with a recovered serial reception signal, wherein
each bidirectional high speed port comprises a pre-CDR loopback signal path and a post-CDR loopback signal path either of
which can be repurposed as a low latency functional path.

US Pat. No. 9,088,378

METHOD FOR TRANSMITTING A DIGITAL SIGNAL IN INVERSE MULTIPLEXING, PARTICULARLY VIA AN OPTICAL TRANSPORT NETWORK, AND RECEPTION DEVICE FOR A SYSTEM TO CARRY OUT THE METHOD

Adva Optical Networking S...

1. A method for the transmission of a digital signal in inverse multiplexing via an Optical Transport Network (OTN), the method
comprising:
(a) splitting a digital transmit signal, comprising a data signal carrying data traffic to be transmitted via the OTN, into
a certain number M of several sub-signals and assigning individual bytes of respective sub-signals to a different respective
one of multiple transmission lines of the OTN, where each sub-signal of a transmit side of a transmission line of the OTN
assigned exclusively to this sub-signal is transmitted to a reception side of the assigned transmission line, and

(b) in which, on the reception side of the transmission lines, the sub-signals are reassembled to a digital reception signal;
(c) on the reception side, bit errors in the digital reception signal including their position in the digital reception signal
are detected,

(d) from the detected position of the bit errors and from the assignment of the individual bytes of the digital reception
signal to the respective sub-signals and transmission lines, which assignment is also known on the reception side, it is determined
to which sub-signal the detected bit errors were assigned, and

(e) from the determination of (d), one or more adjustable parameters are determined, which characterize the transmission quality
of the transmission lines assigned to each sub-signal or provide inferences regarding which error mechanisms of the transmission
line in question impact its transmission quality.

US Pat. No. 9,231,877

METHOD AND APPARATUS FOR SCALING TRAFFIC ENGINEERING ROUTING IN A NETWORK

ADVA Optical Networking S...

1. A method for scaling Traffic Engineering, TE, routing in a network, comprising a plurality of network elements (nodes)
connected in a given layer to each other via links,
wherein contiguous TE domain segments, TE-SEGs, of a TE domain of said network are collapsed into virtual TE nodes, VN, each
having an allocated TE domain unique identifier, VNID, and a detailed connectivity matrix, DCM, to provide a hierarchically
virtualized network topology of said network,

wherein a TE domain segment, TE-SEG, is selected by a network operator as an arbitrary contiguous part of the TE domain, and
is collapsed into at least one virtual TE node, VN, representing the selected TE domain segment, TE-SEG,

wherein the virtual TE node, VN, collapsing is achieved by reconfiguring the TE links, connecting the selected TE domain segment,
TE SEG, with the rest of the TE domain, thus forming VN access links, ALs, as well as all of the TE domain segment TE links,
thus forming VN internal TE links, ILs, in such a way, that the AL advertisements flooded across the TE domain represent said
TE domain segment, TE-SEG, to the remaining part of the TE domain as at least one virtual TE node, while the IL advertisements
are contained within the respective VN(s) and are not leaked into said TE domain.

US Pat. No. 9,231,724

METHOD FOR OPERATING AN OPTICAL TRANSMISSION SYSTEM

ADVA Optical Networking S...

1. A method for operating an optical transmission system, the method comprising:
(a) generating for a tunable laser of a first terminal a pilot tone having an adjustable pilot tone frequency which identifies
a wavelength division multiplexing channel used by the respective tunable laser;

(b) modulating the generated pilot tone of said tunable laser with pilot tone data to provide a pilot tone data signal;
(c) supplying the pilot tone data signal and a high frequency data signal to said tunable laser which generates an optical
laser signal output by said tunable laser in response to the supplied signals;

(d) transporting said optical laser signal to a remote central wavelength locker of a second terminal via an optical transport
medium;

(e) converting the received optical laser signal by means of a photo diode of said remote central wavelength locker to provide
a pilot tone data signal for wavelength division multiplexing channels which is demodulated to detect the pilot tone and the
pilot tone data for each individual wavelength division multiplexing channel;

(f) identifying the wavelength division multiplexing channel used by the respective tunable laser on the basis of the pilot
tone frequency of the detected pilot tone and evaluating the pilot tone data of the identified wavelength division multiplexing
channel;

(g) splitting in the remote central wavelength locker the received optical laser signal into a first signal part which is
filtered by an etalon filter and applied to an etalon photo diode and into a second signal part which is applied directly
to a reference photo diode;

(h) comparing the pilot tone amplitude at the reference photo diode and at the etalon photo diode to monitor whether the wavelength
of the respective optical laser signal does match a predetermined target wavelength and/or whether the amplitude of the optical
laser signal matches a predetermined target power; and

(i) controlling the wavelength and/or the power of the tunable laser by said second terminal by transmitting a feedback control
signal via a downstream embedded communication channel to said first terminal to adjust the respective tunable laser in response
to the received feedback control signal.

US Pat. No. 9,219,523

METHOD AND DEVICE FOR TRANSMITTING AN OPTICAL DIGITAL WDM SIGNAL OVER AN OPTICAL TRANSMISSION LINK OR A PASSIVE OPTICAL NETWORK

ADVA Optical Networking S...

1. A method for transmitting an optical digital WDM (wavelength division multiplex) signal over an optical transmission link
or a passive optical network, the optical digital WDM signal (SWDM) including N optical channels matching a given optical frequency grid, the method comprising:
(a) supplying the optical digital WDM signal (SWDM) to a near end of the optical transmission link or a near end of the passive optical network;

(b) receiving the optical digital WDM signal (SWDM) at a far end of the optical transmission link or at one or more far ends of the passive optical network;

(c) separating optical channel signals (si(t)) from the optical digital WDM signal (SWDM) by splitting and bandpass filtering the optical digital WDM signal (SWDM) received; and

(d) converting the optical channel signals (si(t)) into electrical channel signals using direct optical detection;

(e) the optical digital WDM signal (SWDM) is created such that neighboring channel signals (si(t)) are orthogonally polarized;

(f) applying pre-distortion for creating the optical channel signals (si(t)) by adding a pre-distortion signal (spd,i(t)) to a respective digital modulation data signal (smod,i(t)) which is used for creating the respective optical channel signal (si(t)), the pre-distortion signal (spd,i(t)) including at least one pre-distortion component depending on the optical channel signal (si±j)) of a neighboring channel; and

(g) wherein the at least one pre-distortion component is dependent on the overlap of the spectral optical filter function
(Fi(f)) used at the far end of the optical transmission link or at one or more far ends of the passive optical network to extract
the respective optical channel signals (si(t)) from the optical digital WDM signal (SWDM) received and on the spectrum of the optical channel signal (si±j)) of the respective neighboring channel, and wherein the pre-distortion signal spd,i(t)) is subtracted from the modulation data signal (smod,i(t)).

US Pat. No. 9,379,513

METHOD FOR CONTROLLING SIGNAL GAIN OF A RAMAN AMPLIFIER

ADVA Optical Networking S...

1. A method for dynamically controlling signal gain and saturation of a pumped Raman amplifier, the method comprising:
controlling a pump power of a pump signal of the pumped Raman amplifier in response to a plurality of monitored optical signals,
wherein said plurality of monitored optical signals comprises:
a signal light launched into a transmission line fiber connected to said pumped Raman amplifier, wherein said signal light
launched into the transmission line fiber is used for a feed-forward pump control in order to control the signal gain; and

an amplified signal Rayleigh backscattered (RBS) light reflected back from the transmission line fiber, wherein said amplified
signal Rayleigh backscattered (RBS) light comprises a pump signal and is used for a feedback pump control in order to control
the gain saturation.

US Pat. No. 9,391,923

USING PATH COMPUTATION ELEMENT COMMUNICATION PROTOCOL (PCEP) AS A SIGNALLING PROTOCOL DURING DYNAMIC SERVICE PROVISION IN NETWORKS

ADVA OPTICAL NETWORKING S...

1. A network, comprising:
a network element comprising a control plane;
a management plane;
a path computation client (PCC); and
a remote path computation element (PCE);
wherein a hard state point-to-point protocol is used as a management protocol to communicate management messages in the management
plane, wherein the management messages contain service configuration parameters to be dynamically applied to a service interface
of the network element for generalized multi-protocol label switching (GMPLS) controlled dynamic service provisioning in said
control plane of said network element;

wherein said hard state point-to-point protocol comprises a PCE communication protocol (PCEP) by which the PCC communicates
the service configuration parameters to the remote PCE for outsourcing a path selection function to the remote PCE;

wherein said PCEP protocol allows the service configuration parameters to be signaled to the PCE, and paths produced by the
PCE to be signaled back to the PCC;

wherein the PCEP protocol is used as a signaling protocol to signal one or more service release requests, service modification
requests, or service reroute requests around non-responsive controllers of nodes using the PCEP protocol as a signaling protocol;
and

wherein the network is adapted to perform service management of services according to service provisioning signaling patterns
comprising:

a one-way end to end pattern starting on a service ingress node via transit nodes to a service egress node;
a two way end to end pattern starting on a service ingress node via transit nodes to a service egress node and then back in
reverse direction via the transit nodes to the service ingress node;

a one-way end to end pattern starting from a service egress node via transit nodes to a service ingress node;
a two way pattern starting from a transit node in either or both directions via transit nodes to a service ingress node and/or
service egress node;

a pattern wherein signaling is scoped to a path segment;
a pattern wherein signaling is scoped to an arbitrary subset of nodes; and
a star-n-spoke pattern;
wherein a single entity signals service configuration parameters to each node individually and in an arbitrary order.

US Pat. No. 9,473,246

METHOD AND TUNING DEVICE FOR TUNING A TUNABLE OPTICAL TRANSMITTER TO A PREDETERMINED TARGET WAVELENGTH

ADVA Optical Networking S...

1. A method for tuning a tunable optical transmitter to a target wavelength, the tunable optical transmitter being included
in a plurality of optical transmitters connected to a first end of an optical WDM transmission link, the method comprising:
(a) supplying at least one tuning signal to the tunable optical transmitter to control the tunable optical transmitter to
create an optical calibration signal according to nominal tuning information comprising at least one parameter of the at least
one tuning signal, wherein

(i) the optical calibration signal has a wavelength lying within a secure wavelength range which excludes any optical channel
wavelength range predefined for transmitting an optical channel signal by another one of the plurality of optical transmitters
in the direction of the optical calibration signal over the WDM transmission link, and

(ii) the nominal tuning information is determined from a known nominal wavelength dependency characterizing the wavelength
dependency of the tunable optical transmitter on the at least one parameter of the at least one tuning signal;

(b) determining calibration information by directly or indirectly measuring, within the secure wavelength range, a deviation
between an actual wavelength dependency of the tunable optical transmitter and the nominal wavelength dependency; and

(c) controlling the tunable optical transmitter to create an optical channel signal according to target tuning information
which is determined from a corrected nominal wavelength dependency corrected with respect to the nominal wavelength dependency
based on the calibration information, the optical channel signal having a wavelength within a predetermined acceptable tolerance
to the target wavelength.

US Pat. No. 9,397,749

METHOD AND APPARATUS FOR PERFORMING AN AUTOMATIC POWER ADJUSTMENT FOR AN OPTICAL SIGNAL

ADVA OPTICAL NETWORKING S...

10. An add/drop multiplexing node for an optical network comprising at least one network interface connected to a multichannel
multiplexing/demultiplexing unit comprising:
a predetermined number of channel ports each being connected to an optical transceiver having a signal adjustment unit to
adjust automatically a signal power level of one optical channel transmitted by said connected optical transceiver towards
the respective channel port to achieve a predetermined desired receive signal power level of the optical channel received
by the respective channel port of said multichannel multiplexing/demultiplexing unit;

wherein said automatic adjusting is performed by said connected optical transceiver in real time;
wherein the signal power level of the one optical channel is adjusted automatically such that the signal power level of the
one optical channel is balanced with respect to signal power levels of other optical channels transmitted over the same optical
span at different wavelength, making the signal power levels have a substantially flat optical power spectrum;

wherein each optical channel is transmitted via a different wavelength; and
wherein at least one communication channel is established between the connected optical transceiver and the multichannel multiplexing/demultiplexing
unit.

US Pat. No. 9,083,456

METHOD AND APPARATUS FOR DETECTING UNCHARACTERISTIC POWER LEVEL CHANGES OF AN OPTICAL SIGNAL

ADVA OPTICAL NETWORKING S...

1. A monitoring apparatus for detecting uncharacteristic power level changes of an optical signal transmitted through an optical
fiber, said monitoring apparatus comprising:
a power level variance calculation unit adapted to calculate a power level variance on the basis of a long-term power level
and a current power level of said optical signal and

a short-term variance filter adapted to filter transient changes indicated by the calculated power level variance and to generate
a trouble occurrence indication indicating an uncharacteristic short-term power level change, if the filtered power level
variance exceeds a predetermined power level variance.

US Pat. No. 9,413,486

METHOD FOR COMPLEMENTING DYNAMIC RESOURCE-LEVEL PATH COMPUTATION

ADVA Optical Networking S...

1. A method for complementing dynamic resource-level path computation with a resource grouping constraint in an optical wavelength
division multiplexing (WDM) network, comprising the steps of:
deriving, using a resource group function (RGF) deriving unit comprising a processor and memory, a resource group function
(RGF) from inter-relationships amongst network resources within at least one network element forming at least one network
resource group (NRG); and

performing, using a path computation unit, the resource-level path computation accounting for the derived resource group function
(RGF);

said optical WDM network comprising network resources having atomically allocatable transport units;
said optical WDM network comprising optical channels, transponders and regenerators as network resources;
wherein the network resources of the network resource group (NRG) share a common set of at least one of attributes, functionalities
and inter-relationships,

wherein inter-relationships are induced via either one of device limitations and non-orthogonalities of the network resources,
wherein said device limitations and said non-orthogonalities of the network resources are induced directly through an application,
wherein said optical WDM network comprises at least one reconfigurable optical add drop multiplexer (ROADM) as the at least
one network element, said ROADM comprising a multiport-tunable filter to which tunable transponders are connected, and

wherein the multi-port tunable filter comprises an exclusion relationship between the wavelength channels.

US Pat. No. 9,166,722

METHOD AND APPARATUS FOR INCREASING A TRANSMISSION PERFORMANCE OF A HYBRID WAVELENGTH DIVISION MULTIPLEXING SYSTEM

ADVA OPTICAL NETWORKING S...

1. A hybrid wavelength division multiplexing system wherein;
one or more intensity modulated signals are co-propagated with one or more phase modulated signals;
an extinction ratio of the intensity modulated signals is reduced to minimize a cross-phase modulation impact on the co-propagating
phase modulated signals;

the intensity modulated signal is generated by an optical amplitude modulator comprising a Mach-Zehnder modulator receiving
an adapted drive voltage to modulate the intensity of an optical signal generated by a light source;

said optical amplitude modulator is integrated in a transmitter of a near-end transceiver within said hybrid wavelength division
multiplexing system; and

the drive voltage is preconfigured or set dynamically in response to information data obtained by a receiver of a remote transceiver
within said hybrid wavelength division multiplexing system and communicated to said transmitter of said near-end transceiver
within said hybrid wavelength division multiplexing system via an optical supervisory channel (OSC).

US Pat. No. 9,337,921

METHOD AND APPARATUS FOR MONITORING MECHANICAL FIBER STRESS OF OPTICAL FIBER SPANS

ADVA Optical Networking S...

1. A method for monitoring mechanical fiber stress of optical fiber spans within an optical network comprising:
monitoring continuously a timing phase of a received optical signal transported through said optical fiber spans;
deriving the mechanical fiber stress in said optical fiber spans on the basis of an observed phase shift of said timing phase
within a predetermined observation period of time,

wherein the timing phase of the received optical signal is extracted by a clock recovery block of a receiver receiving said
optical signal transported through said optical fiber spans.

US Pat. No. 9,166,725

OPTICAL NETWORK ELEMENT AND OPTICAL TRANSMISSION SYSTEM

ADVA Optical Networking S...

1. Optical line terminal, OLT, transmitting signals in a downstream direction and receiving signals in an upstream direction,
characterized by:
transceivers configured to transmit DWDM signals in the downstream direction and to receive DWDM signals in the upstream direction
via one single optical fiber link;

primary optical pumping means configured to provide optical pump power in the downstream direction to said at least one optical
fiber link, said primary optical pumping means configured to provide optical pump power to amplify the DWDM upstream signals
in said at least one optical fiber link; and

secondary optical pumping means configured to provide optical pump power in the downstream direction to said at least one
optical fiber link, said secondary optical pumping means configured to provide optical pump power to amplify the DWDM downstream
signals in said at least one optical fiber link;

wherein said primary optical pumping means comprise a plurality of pump light sources, wherein at least two of said pump light
sources are configured to provide optical pump power at different wavelengths, and said receiving means and/or said transceivers
are configured to receive or transmit, respectively, signals in the optical C-band and/or optical L-band.

US Pat. No. 9,112,617

METHOD AND DEVICE FOR MONITORING A DETACHABLE FIBER-OPTIC CONNECTION, ESPECIALLY IN A FIBER-OPTIC TRANSMISSION DEVICE OR SYSTEM

ADVA Optical Networking S...

1. A method for monitoring a detachable fiber-optic connection, the method comprising the steps of:
(a) directing an optical transmission signal through one or more optical waveguides, each respective optical waveguide including
a respective fiber-optic connection, and the optical transmission signal carrying information data to be received at a respective
receiving device connectable to the respective optical waveguide through the respective fiber-optic connection, each respective
fiber-optic connection reflecting a portion of the power of the optical transmission signal, the reflected portion of the
power of the optical transmission signal depending on the status and properties of that respective fiber-optic connection,

(b) creating a detection signal by detecting the reflected portion of the power of the optical transmission signal,
(c) monitoring and evaluating the detection signal as a function of time, and
(d) creating a “DETECT” signal if, irrespective of the power of the optical transmission signal, the detection signal or a
signal derived from the detection signal reveals a characteristic change in course over time, the characteristic change in
course over time being indicative of connecting or disconnecting a respective one or more of the fiber-optic connections.

US Pat. No. 9,401,856

LATENCY MONITORING FUNCTION

ADVA Optical Networking S...

1. A network, comprising:
a computer processor, a memory,
an intermediate latency monitoring point of a service provider,
a master node and a slave node,
said latency monitoring point comprising an Latency Monitoring Point (LMP) clock, said LMP clock providing a LMP time stamp,
said intermediate latency monitoring point adapted to
calculate a mean latency of a path between said master node and said slave node on a basis of time stamps or time tags which
are exchanged periodically between said master node and said slave node using a time of day protocol in said network, wherein
said intermediate latency monitoring point comprises

a calculation unit adapted to
calculate the mean latency of said path between
said master node and said slave node
by subtracting the LMP time stamp
when a delay request message of a time of day protocol is received by said intermediate latency monitoring point from said
slave node on its way towards the master node

from a slave time stamp
when said delay request message has been sent by said slave node towards said master node,
wherein the slave time stamp is extracted by the intermediate latency monitoring point from a copy of said delay request message
passing through said intermediate latency monitoring point on its way towards the master node, and

wherein said intermediate latency monitoring point is adapted to copy synchronization messages of said time alignment protocol
which are exchanged periodically between the master node and said slave node to synchronize a slave clock of said slave node
with a master clock of said master node and pass through said intermediate latency monitoring point and is adapted to extract
the time stamps from said copied synchronization messages.

US Pat. No. 9,344,213

METHOD FOR TUNING A TUNABLE OPTICAL TRANSMITTER IN AN OPTICAL WDM TRANSMISSION SYSTEM AND CORRESPONDING OPTICAL WDM TRANSMISSION SYSTEM

ADVA Optical Networking S...

1. An optical WDM transmission system including:
(a) a plurality of first optical transceivers at a first end of an optical WDM transmission link, each of the first optical
transceivers including a tunable optical transmitter being configured to create a first digital optical channel signal within
the bandwidths of a set of first optical channels of the optical WDM transmission system according to tuning control information,

(b) multiplexing means for multiplexing the first digital optical channel signals into a first optical WDM signal, which is
supplied to the first end of the optical WDM transmission link,

(c) a plurality of second optical transceivers at a second end of the optical WDM transmission link, each of the second optical
transceivers including an optical transmitter being configured to create a second digital optical channel signal within the
bandwidth of a predetermined optical channel of a second set of optical channels of the optical WDM transmission system,

(d) multiplexing means for multiplexing the second digital optical channel signals into a second optical WDM signal, which
is supplied to the second end of the optical WDM transmission link,

(e) demultiplexing means for demultiplexing the second optical WDM signal into the second digital optical channel signals
and providing each of the second digital optical channel signals to a dedicated first optical transceiver, and

(f) a central tuning device connected in the optical path between the first optical transceivers and the second optical transceivers,
and configured to create the tuning control information for one or more selected or all of the first optical transceivers
by

(i) tapping off an optical WDM detection signal from the first optical WDM signal,
(ii) extracting a tuning status information from the optical WDM detection signal and determining tuning control information
for at least one of the first transceivers,

(g) the central tuning device being further configured to supply the tuning control information to the at least one first
transceiver by modulating the second optical WDM signal according to the tuning control information applying an amplitude
modulation of the second optical WDM signal using a dedicated WDM tone frequency as a carrier frequency which is modulated
according to the tuning control information.

US Pat. No. 9,294,215

METHOD OF OPERATING AN OPTICAL NETWORK ELEMENT AND OPTICAL NETWORK ELEMENT

ADVA Optical Networking S...

1. Optical network unit, ONU, wherein said optical network unit is configured to perform the following:
a coarse tuning process of at least one transmission wavelength which is used by said first optical network element for transmitting
an optical signal to an optical line terminal (OLT); and

a fine tuning process of said at least one transmission wavelength performed after said coarse tuning process, comprising
generating and transmitting a frequency modulated (FM) dither signal wherein the ONU is configured to transmit the FM dither
signal simultaneously to an eventually ongoing user data transmission from the ONU to the OLT;

wherein said optical network unit is configured to transmit an optical signal to said optical line terminal by using a first
transmission wavelength, and to receive feedback information from said optical line terminal, wherein said feedback information
comprises at least one of information indicating at least one parameter for a step of coarse tuning to be performed within
said optical network unit, information indicative of the fact that no coarse tuning is necessary, to transmit an optical signal
including the dither signal from said first optical network unit to said optical line terminal or a further optical network
element by using said first transmission wavelength, and to receive feedback information from said optical line terminal or
said further optical network element, wherein said feedback is at least partially generated from analyzing the dither signal
providing information comprises at least one of information indicating at least one parameter for a step of fine tuning to
be performed within said first optical network element, the information indicative of the fact that no fine tuning is necessary.

US Pat. No. 9,215,116

METHOD, TRANSMITTER AND RECEIVER DEVICE FOR TRANSMITTING A BINARY DIGITAL TRANSMIT SIGNAL OVER AN OPTICAL TRANSMISSION LINK

ADVA Optical Networking S...

1. A method for transmitting a binary digital transmit signal having a given bit interval over an optical transmission link,
the method including:
(a) creating a pre-coded digital signal by one of:
(i) performing a first pre-coding operation to pre-code the binary digital transmit signal into an intermediate pre-coded
digital signal, the first pre-coding operation being identical with or equivalent to applying a non-XOR operation to the binary
digital transmit signal and the intermediate pre-coded digital signal delayed by one bit interval, and performing a second
pre-coding operation to pre-code the intermediate pre-coded digital signal into the pre-coded digital signal, the second pre-coding
operation being identical with or equivalent to applying a non-XOR operation to the intermediate pre-coded digital signal
and the pre-coded digital signal delayed by one bit interval, or

(ii) performing a direct pre-coding operation to pre-code the binary digital transmit signal into the pre-coded digital signal,
the direct pre-coding operation being identical with or equivalent to applying a non-XOR operation to the binary digital transmit
signal and the pre-coded digital signal delayed by two bit intervals;

(b) duobinary encoding the pre-coded digital signal into a differential duobinary signal;
(c) applying the differential duobinary signal to modulate an optical light source of an optical modulator device having a
predetermined optical wavelength to create a differential optical duobinary signal;

(d) supplying the differential optical duobinary signal to a first end of the optical transmission link and transmitting the
differential optical duobinary signal to a second end of the optical transmission link;

(e) detecting the optical power of the differential optical duobinary signal at the second end of the optical transmission
link to create a receive signal and processing the receive signal to create a binary digital receive signal corresponding
to the binary digital transmit signal;

(f) wherein the binary digital receive signal is created by,
(i) interpreting the receive signal as ternary digital signal, sampling the receive signal using a first and a second decision
threshold and creating a first binary digital recovered signal revealing a “1” level, if the respective sampled value is above
the first decision threshold, and a “0” level, elsewise, and creating a second binary digital recovered signal revealing a
“1” level, if the respective sampled value is above the second decision threshold, and a “0” level, elsewise, and

(ii) applying a non-XOR operation onto the first and second binary digital recovered signals to create the binary digital
receive signal; and

(g) wherein the receive signal or the optical differential duobinary signal is low-pass filtered in such a way that the bandwidth
of the respective low-pass filtered signal is within the range of 0.25 to 0.35 times the bit rate of the binary digital transmit
signal.

US Pat. No. 9,166,695

OPTICAL FREQUENCY LOCKING METHOD AND DEVICE FOR OPTICAL DATA TRANSMISSION

ADVA Optical Networking S...

1. An optical frequency locking method for tuning each of a plurality of narrow-band optical channel transmit signals to a
respective dedicated optical channel frequency, the channel transmit signals having arbitrary channel frequency spacings,
the method comprising, for each channel transmit signal, the steps of:
(a) tapping-off a portion of the optical power of the channel transmit signal to be tuned and filtering the tapped-off channel
transmit signal using at least one optical filter device having a periodic transfer function, at least one of the channel
frequency spacings of the channel transmit signals being unequal to the periodicity of the transfer function;

(b) monitoring, as an optical input signal, the optical power of the channel transmit signal supplied to the at least one
optical filter device, and monitoring, as an optical output signal, the optical power of the filtered channel transmit signal;
and

(c) tuning, within a predetermined locking range for the dedicated optical channel frequency, the optical frequency of the
respective channel transmit signal such that a predetermined value for a target ratio is reached, the target ratio comprising
the ratio of the optical output signal and the optical input signal corresponding to the respective dedicated optical channel
frequency, wherein the predetermined locking range is defined by,

(i) determining a first spectral distance between the respective dedicated channel frequency and a first neighboring point
at a lower frequency having the same value of the ratio of the optical output and input signal as the predetermined value
of the target ratio and determining a second spectral distance between the respective dedicated channel frequency and a second
neighboring point at a higher frequency having the same value of the ratio of the optical output and input signal as the predetermined
value of the target ratio, and

(ii) using as the locking range either the whole range between the first and second neighboring points, or the range between
the frequencies defined by the respective dedicated optical channel frequency plus and minus the smaller one of the first
and second spectral distance.

US Pat. No. 9,496,958

METHOD AND APPARATUS FOR TRAFFIC ENGINEERING ON AN OPTICAL TRANSPORT NETWORK

ADVA OPTICAL NETWORKING S...

1. A method for traffic engineering on an optical transport network, OTN, comprising network elements implementing asymmetric
OTN switches, said method comprising:
(a) discovering by each network element of said network ODUk containers available on each of locally terminated traffic engineering,
TE, links and identifying the switching limitations of the discovered ODUk containers with respect to how said ODUk containers
are switchable onto the ODUk containers available on other locally terminated TE links;

(b) identifying by said network element groups of ODUk containers available on a given TE link exhibiting identical switching
limitations;

(c) negotiating by said network element with its neighboring network elements properties of to be advertised child TE links
each associated with a separate ODUk group; and

(d) advertising by said network element for each identified group of ODUk containers a separate child TE link parallel to
the original parent TE link,

wherein each advertised child TE link indicates the total number of available ODUk containers within the respective ODUk group
along with the identified switching limitations exhibited by the ODUk containers of said ODUk group and

wherein the re-advertised parent TE link indicates the number of available ODUk containers reduced to account for the ODUk
containers associated with the separately advertised child TE links.

US Pat. No. 9,306,692

METHOD AND DEVICE FOR ASSESSING THE PERFORMANCE OF ONE OR MORE PACKET SYNCHRONIZATION SERVICES IN A PACKET DATA TRANSMISSION NETWORK

ADVA Optical Networking S...

1. A method for assessing and monitoring the performance of one or more packet synchronization services in a packet data transmission
network,
the packet data transmission network comprising
(i) a transport network for receiving, from a central time information distribution node for transmitting into a transport
network a digital timing signal (Sp) including a central time information for at least one of the timing parameters absolute time, relative time, frequency and
phase, and

(ii) at least one receiving network node for receiving the digital timing signal (Sp) via the transport network, detecting the central time information included in the digital timing signal (Sp) received and using the central time information in order to synchronize the at least one timing parameter at the receiving
network node and the central time information distribution node;

the method comprising the steps of:
(a) at a packet data transmission network probing point, determining at least two synchronization quality describing or influencing
parameters based on at least one of the digital timing signal (Sp) received, the recovered time information for the at least one timing parameter and parameters having impact on the synchronization
quality and describing or controlling properties of hardware components present at the receiving network node;

(b) at the packet data transmission network probing point, determining a value of at least one synchronization performance
score for a given time interval based on the at least two synchronization quality describing or influencing parameters each
for the same time interval, the at least one synchronization performance score each having a respective predefined scoring
scale covering a given range of values; and

(c) at the packet data transmission network probing point, collecting the values of the at least one synchronization performance
score for one or more given collection time intervals and storing or displaying these synchronization performance score values
for monitoring purposes.

US Pat. No. 9,813,184

METHOD AND COMMUNICATION CONTROL DEVICE FOR ESTABLISHING A COMMUNICATION CHANNEL IN A COMMUNICATION NETWORK

Adva Optical Networking S...

1. A method for establishing a communication channel, preferably an embedded control channel, between a central network node
and at least one network unit to be integrated in a communication network comprising the central network node and an arbitrary
but limited number of network units, the central network node being adapted to create and output a wavelength-division multiplex
(WDM) downstream signal comprising downstream channel signals to be transmitted to the network units and to receive a WDM
upstream signal comprising upstream channel signals created by the network units, the method comprising the steps of:
(a) in a setup mode, creating a setup channel signal at the at least one network unit, the frequency spectrum of which comprises,
as a modulation component, a setup label which is selected from a predetermined set of at least two setup labels, a predetermined
setup address label being associated with each setup label, and transmitting, from the at least one network unit, the setup
channel signal in the direction of the central network node;

(b) detecting, at the central network node, the presence of a new upstream channel signal created by the at least one network
unit within the WDM upstream signal by detecting a respective new setup label and determining the setup address label associated
with the setup label detected, and creating, at the central network node, a downstream channel signal receivable by the at
least one network unit by modulating the WDM downstream signal according to a downstream modulation signal comprising, as
information to be transmitted to the at least one network unit, a setup information and an address information comprising
the setup address label associated with the setup label detected, wherein the setup information comprises a unique operating
address label that has been assigned to the at least one network unit, wherein the operating address label is selected from
a set of operating address labels different from the setup address labels; and

(c) at the at least one network unit, receiving the respective downstream channel signal and extracting and further processing
the setup information in case the setup address label included within the respective downstream channel signal equals the
setup address label associated with the setup label of the setup channel signal that has been sent by the at least one network
unit.

US Pat. No. 9,628,367

METHOD FOR TRAFFIC ENGINEERING ON NETWORKS MADE OF ASYMMETRICAL NETWORK SWITCHES

ADVA Optical Networking S...

1. An asymmetrical network switch, comprising:
a processor; and
a non-transitory computer readable medium, including:
instructions executable by the processor to auto-discover and advertise into a traffic engineering, TE, domain a switch detailed
connectivity matrix, SDCM, containing for each allowed switching combination of interfaces of said asymmetrical network switch
at least one switch detailed connectivity matrix entry, SDCME,

each SDCME representing a potential connection internal to said asymmetrical network switch and interconnecting the interfaces
of said interface switching combination,

an SDCME advertisement by said switch including a switch detailed connectivity matrix entry cost vector, SDCME CV, comprising
a set of attributes describing cost penalties as various service characteristics that a network service incurs if said network
service selects a path or a tree traversing the asymmetrical switch in accordance with the SDCME, and

an auto-discovery unit adapted to auto-discover cost attributes of the said potential connection internal(s) to said asymmetrical
network switch, wherein the cost attributes include at least one of a data propagation delay penalty, a data loss ratio penalty,
a traffic engineering, TE, cost penalty, or an optical signal quality penalty.

US Pat. No. 9,596,072

METHOD AND APPARATUS FOR MITIGATION OF PACKET DELAY VARIATION

ADVA OPTICAL NETWORKING S...

1. A method for mitigation of packet delay variation, PDV, in a packet-based network, the method comprising:
receiving event messages at an ingress port of a network device and timestamp each received event message with a local ingress
timestamp at the instant of reception of the event message using a local internal clock of the network device;

extracting a timestamp embedded in the received event message and calculating a time offset between the extracted embedded
timestamp and the local ingress timestamp of the received event message;

recording the calculated time offset as a maximum observed delay, if the calculated time offset exceeds a previously recorded
maximum observed delay; and

adjusting an internal transmission delay time before onward transmission of the event message from an egress port of the network
device depending on a time difference between the recorded maximum observed delay and the calculated time offset of the event
message to minimize the packet delay variation, PDV, at the egress port of the network device,

wherein each data packet received at the ingress port of the network device is automatically timestamped with the local ingress
timestamp and the received timestamped data packet is examined to decide whether the received timestamped data packet is a
protocol event message or carries an event message as payload data.

US Pat. No. 9,577,873

METHOD AND A SYSTEM FOR PROVIDING A FLEXIBLE SECONDARY DATA PATH

ADVA Optical Networking S...

1. A method for providing a flexible secondary data path control, said method comprising the steps of:
a) detecting a primary data path failure of a primary data path between a customer premise site and a central office site;
b) initiating a corresponding secondary data path if a primary data path failure of said primary data path has been detected;
c) proceeding with at least one of:
initiating a measurement of data path characteristics of said initiated secondary path, and
utilizing constantly monitored data path characteristics of paths for an available secondary data path; and
d) determining services to be provided via said secondary data path depending on the measured data path characteristics of
said secondary data path,

wherein secondary links of a backup network infrastructure offer non-constant, non-predictable bit rates and asymmetric bit
rates for an uplink and downlink connection, and said non-constant, non-predictable bit rates and asymmetric bit rates demand
a flexible adjustment and an associated data traffic flow to cope with these data rate changes, and

wherein said primary data path and said secondary data path are tested constantly to detect path changes or path failures
of said primary data path and secondary data path, and

wherein the measurement of the primary data path and said secondary data path does not impair or harm user traffic or service
traffic, and

wherein the secondary data path is used until the primary data path returns to a normal operation state,
wherein said secondary data path includes different backup infrastructures with corresponding different path metrics; and
wherein said backup infrastructures of said secondary data path comprises a wireless network infrastructure including a CDMA,
GSM EDGE, UMTS, LTE or WIMAX network and/or a microwave-based connection and/or a satellite-based connection.

US Pat. No. 9,775,260

BRACKETS FOR USE WITH THREE RACK MOUNT SYSTEMS

1. An assembly comprising:
a component with a pattern of bores for receipt of threaded chassis connectors to connect a pair of mounting brackets to the
component, the component having a specific component width;

an ETSI EN 300 119 rack adapted to receive multiple components through engagement of a set of threaded elements with a set
of bores within the ETSI EN 300 119 rack;

a pair of brackets with a first bracket and a second bracket adapted to attach the component with the specific component width
to at least three different standardized types of racks including the ETSI EN 300 119 rack;

the first bracket and the second bracket each comprising:
a corner connecting a short leg with a long leg that is longer than the short leg;
the short leg having a set of at least one short-leg-chassis-holes to allow a set of at least one threaded chassis connector
to connect with a pattern of threaded bores on the component to allow each bracket to be connected to the component with the
long leg extending away from the component;

the long leg having a set of at least two long-leg-rack-mount-openings;
the long leg having a set of at least one long-leg-chassis-holes to allow a set of at least one threaded chassis connector
to connect with the pattern of threaded bores on the component to allow each bracket to be connected to the component with
the short leg extending away from the component;

the short leg having a set of at least two short-leg-rack-mount-openings;
the pair of brackets are connected by threaded chassis connectors to the component and connected by the set of threaded elements
to the ETSI EN 300-119 rack:

with the short leg of the first bracket connected to the component and the long leg of the first bracket extending outward
from the component and the long leg of the first bracket is connected to the ETSI EN 300 119 rack; and

with the long leg of a second bracket connected to the component and the short leg of the second bracket extending outward
from the component and the short leg of the second bracket connected to the ETSI EN 300 119 rack;

wherein the pair of brackets may be used to connect the component to a North American Telco 23 Inch Rack when the pair of
brackets is connected to the component and the long legs of both of the pair of brackets engage the North American Telco 23
Inch Rack; and

wherein the pair of brackets may be used to connect the component to a EIA-310 19 Inch Rack when the pair of brackets is connected
to the component and the short legs of both of the pair of brackets engage the EIA-310 19 Inch Rack; and

wherein the component may be connected to the pair of brackets with the pattern of bores in the component for the North American
Telco 23 Inch Rack, EIA-310 19 Inch Rack and the ETSI EN 300-119 rack.

US Pat. No. 9,806,843

METHOD AND DEVICE FOR CREATING A CONTROL CHANNEL IN AN OPTICAL TRANSMISSION SIGNAL AND METHOD AND DEVICE FOR EXTRACTING THE INFORMATION INCLUDED THEREIN

Adva Optical Networking S...

1. A method for creating a control channel in an optical transmission signal,
(a) wherein the optical transmission signal comprises an optical carrier frequency component, a higher frequency modulation
component carrying user information to be transported from a first end to a second end of an optical transmission link and
a lower frequency modulation component carrying control information, the higher frequency modulation component realizing a
user channel and the lower frequency modulation component realizing the control channel,

(b) wherein the lower frequency modulation component is created by amplitude modulation, and
(c) wherein the lower frequency modulation component is created by using a binary digital modulation scheme and a binary digital
modulation signal in such a way that the lower frequency modulation component comprises a binary digital pilot tone signal
component corresponding to a pilot tone signal having a predetermined pilot tone frequency.

US Pat. No. 9,369,227

PROTECTED OPTICAL SINGLE-FIBER WDM SYSTEM

ADVA Optical Networking S...

12. A protected optical single-fiber WDM system comprising:
(a) a first head end terminal and a second head-end terminal and at least one optical add/drop filter device connected to
form a chain-like transmission path, each of the first and second head-end terminals being connected, at a WDM port, through
a single optical fiber to a western or an eastern WDM port of an adjacent one of the optical add/drop filter devices, respectively,
and each of the optical add/drop filter devices being connected, at an eastern or western WDM port, to a western or eastern
WDM port of an adjacent one of the optical add/drop filter devices, respectively;

(b) at least one tail-end terminal connected to each optical add/drop filter device, wherein a first and a second channel
port of the respective add/drop tail-end terminal is connected to a dedicated first and second channel port of the optical
add/drop filter device through a respective optical fiber;

(c) wherein the head-end terminals, the optical add/drop filter devices and the tail-end terminals are adapted to selectively
or simultaneously establish a bidirectional communication between each tail-end terminal and the first and second head-end
terminal, wherein each tail-end terminal bidirectionally communicates through its first channel port with the first head-end
terminal and bidirectionally communicates through its second channel port with the second head-end terminal, one of these
communication paths serving as a working communication path and the other of these communication paths serving as a protection
path;

(d) wherein for the communication between each of the tail-end terminals and the first and second head-end terminal, respectively,
dedicated optical channel signals lying in a first wavelength band and a second wavelength band are used for each transmission
direction, the first and second wavelength band revealing no overlap and the optical channel signals in each wavelength band
forming, in each transmission direction in the chain-like transmission path, respective optical WDM signals, wherein at least
one dedicated optical channel signal selected from a first set of predetermined optical channels lying in the first wavelength
band is used for the transmission direction from the first or second head-end terminal to each of the tail-end terminals,
and at least one dedicated optical channel signal selected from a second set of predetermined optical channels lying in the
second wavelength band is used for the transmission direction from each of the tail-end terminals to the first or second head-end
terminal;

(e) wherein at least one of the optical add/drop filter devices comprises an optical add/drop filter unit configured (i) to
output, at a first add/drop port, all optical channel signals to be dropped at the respective optical add/drop filter device
from the optical WDM signal received at the western WDM port, (ii) to receive, at the first add/drop port, an optical WDM
signal comprising all optical channel signals received from the at least two tail-end terminals and to integrate these optical
channel signals into the optical WDM signal output at the western WDM port, (iii) to output, at a second add/drop port, all
optical channel signals to be dropped at the respective optical add/drop filter device from the optical WDM signal received
at the eastern WDM port, and (iv) to receive, at the second add/drop port, an optical WDM signal comprising all optical channel
signals received from the at least two tail-end terminals and to integrate these optical channel signals into the optical
WDM signal output at the eastern WDM port;

(f) wherein the optical add/drop filter unit includes a first and a second optical filter element provided in series within
the optical path of the optical WDM signals between the western and eastern WDM port,

(g) wherein the first optical filter element is adapted to reflect all optical channel signals to be dropped at the respective
optical add/drop filter device and included in the optical WDM signals received at the western and eastern WDM ports of the
optical add/drop filter unit and to pass through all other optical channel signals,

(h) wherein the first optical filter element is further adapted and arranged to direct the reflected optical channel signals
received from the western WDM port in a direction to the first add/drop port and to direct the reflected optical channel signals
received from the eastern WDM port in a direction to the second add/drop port,

(i) wherein the second optical filter element is adapted to reflect all optical channel signals to be added at the respective
optical add/drop filter device via the first and second add/drop port of the optical add/drop filter unit and to pass through
all other optical channel signals, and

(j) wherein the second optical filter element is further adapted and arranged to direct the reflected optical channel signals
received via the first add/drop port to the western WDM port and to direct the reflected optical channel signals received
via the second add/drop port to the eastern WDM port.

US Pat. No. 10,031,290

OPTICAL INTERFERENCE FILTER DEVICE, ESPECIALLY FOR AN OPTICAL WAVELENGTH LOCKING DEVICE

ADVA Optical Networking S...

1. An optical interference filter device, especially for an optical wavelength locking device,(a) the optical interference filter device defining a first periodic filter frequency response between a first filter output port and a filter input port and a second periodic filter frequency response having a same free spectral range as the first periodic frequency response between a second filter output port and the filter input port, wherein the first and second periodic filter frequency responses are shifted versus each other by a predetermined optical frequency distance,
wherein
(b) the optical interference filter device comprises an optical ring resonator structure and an optical combining and phase shifting structure,
(c) the optical ring resonator structure comprises two optically coupled ring-shaped optical waveguides, each of which is further coupled to a dedicated optical port waveguide, wherein one of the optical port waveguides defines the filter input port at a first end thereof and a first resonator output port at a second end thereof and wherein the other of the optical port waveguides has an open first end and defines a second resonator output port at a second end thereof,
(d) the optical combining and phase shifting structure has a first and second input port and a first and second output port, the first input port being connected to the first resonator output port and the second input port being connected to the second resonator output port, the first and second output ports defining the first and second filter output ports, respectively, and
(e) the optical combining and phase shifting structure comprises a first crossover path between the first input port and the second output port, a second crossover path between the second input port and the first output port, a first pass-through path between the first input port and the first output port and a second pass-through path between the second input port and the second output port, wherein in both pass-through paths and/or both crossover paths optical phase shifting means are provided which are configured to effect a phase shift difference of plus or minus 90 degrees between the optical signals that are guided in the first pass-through path and the second crossover path and a phase shift difference of minus or plus 90 degrees between the optical signals that are guided in the second pass-through path and the first crossover path.

US Pat. No. 9,729,244

APPARATUS AND METHOD FOR MONITORING SIGNAL QUALITY OF A MODULATED OPTICAL SIGNAL

ADVA Optical Networking S...

1. A transmitter with at least one optical modulator adapted to modulate the optical signal output by a laser source to generate
a modulated optical signal, wherein the optical signal output by the laser source is tapped and supplied to a monitoring circuit,
comprising:
an optical front end configured to select signal components of a tapped modulated optical signal, via optical coherent detection,
and to convert the selected signal components of the tapped modulated optical signal into analog signals; and

at least one analog-to-digital converter (ADC) adapted to perform equivalent-time sampling of the analog signals to provide
digital signals to be processed by a processing unit to monitor signal quality of the modulated optical signal,

wherein the unmodulated optical signal output by the laser source is tapped by a first polarization maintaining coupler and
supplied as a reference signal to the optical front end of the monitoring circuit,

wherein the modulated optical signal output by the optical modulator is tapped by a second polarization maintaining coupler
and supplied to the optical front end of the monitoring circuit, and

wherein the unmodulated optical signal tapped by the first polarization maintaining coupler is supplied as a reference signal
to a first polarization beam splitter of the optical front end, and the modulated optical signal tapped by the second polarization
maintaining coupler is supplied to a second polarization beam splitter of the optical front end.

US Pat. No. 9,755,394

FIBER TEMPERATURE CONTROL ASSEMBLY

ADVA OPTICAL NETWORKING S...

1. A fiber temperature control assembly, comprising:
a spool holding element adapted to hold a fiber spool, and
a compression element adapted to press fiber windings of a doped optical fiber wound around the fiber spool against said spool
holding element, said spool holding element being in thermal contact with either one of a heating and a cooling element of
said fiber temperature control assembly.

US Pat. No. 9,565,128

METHOD FOR MANAGING SERVICES IN A GENERALIZED-MULTI-PROTOCOL LABEL SWITCHING, GMPLS, CONTROLLED NETWORK

ADVA Optical Networking S...

1. A method for managing services in a Generalized-Multi-Protocol Label Switching, GMPLS, controlled network under conditions
of a disrupted control plane connectivity, wherein nodes of said network use a Resource Reservation Protocol with Traffic
Engineering extensions, RSVP-TE, to allocate and provision resources of said network, said method comprising the steps of:
(a) evaluating local RSVP Path or Resv state data by any of said network nodes acting as a sending node, the sending node
having sent at least once a signalling message to a receiving node without receipt of an acknowledgement message from said
receiving node within a configurable time to determine an IP address of a node being located after the non-responsive receiving
node along a service path; and

(b) sending the signalling message by the sending node to the determined IP address of the next node located behind the non-responsive
receiving node along a service path,
wherein if a node of said network detects that it did not receive a Path/Resv Refresh message from a neighbouring node along
the signal path, the node sends at least one RSVP-TE protocol state verification message comprising a Path state verification
(PathVerify) message directed to the upstream neighbouring node or a Resv state verification (ResvVerify) message directed
to the downstream neighbouring node,wherein the node after having sent a configurable number of RSVP-TE protocol state verification messages to the neighbouring
node along the signal path receives neither a Path/Resv Refresh nor Tear message from the neighbouring node, the node sends
a control plane connectivity disruption, CPCD, alarm message to the service ingress node of the respective service,wherein the ingress node of the service after having received the control plane connectivity disruption, CPCD, alarm message
is adapted to notify a management plane and/or a service operator of the respective service that the service has become at
least partially unmanageabledue to a detected control plane connectivity disruption, CPCD, in the signal path and/or to trigger service restoration procedures,wherein if PathModify, PathTear or ResvErr message reaches the neighbouring node of the non-responsive receiving node having
caused the control plane connectivity disruption, CPCD, of the respective service, the neighbouring node sends the message
directly to the IP address of the next node located after the non-responsive receiving node in the downstream direction, andwherein the next node located after the non-responsive receiving node in the downstream direction forwards the message along
the signal path of the service until it reaches the egress node of the respective service to possibly release or reprovision
network resources associated with the respective service.

US Pat. No. 9,628,383

METHOD AND APPARATUS FOR TRANSPORTING TIME RELATED INFORMATION IN A PACKET SWITCHED NETWORK

ADVA Optical Networking S...

1. A time aware device for a packet switched network, comprising:
at least one time tag processing unit, which processes time tag data of a predetermined time tag data field provided within
a header of a tagged data packet transported in said packet switched network to provide time related information reflecting
a delay undergone by said tagged data packet during its transport in said packet switched network,

wherein said header is a layer-two-Ethernet header of a tagged Ethernet packet transported in said packet switched network
and said header comprising a destination address and a source address;

wherein said predetermined time tag data field provided within the header follows directly both said destination address and
said source address, and
wherein said predetermined time tag data field is processed first by said at least one time tag processing unit;
a local time stamp generator for generating a local time stamp, and at least one ingress port,
wherein said local time stamp is stored by said at least one time tag processing unit in a device time stamp field comprised
by said predetermined time tag data field of a time tagged data packet received at said ingress port,

wherein said predetermined time tag data field includes a traceability field, and
wherein said traceability field comprises a hop count field storing a hop counter incremented by the time aware device, said
time aware device modifying the time stamp within said predetermined time tag data field.

US Pat. No. 9,565,163

VERIFICATION OF NETWORK SERVICE PATHS

1. A method for verification of continuity for a network service path that includes at least one network function that blocks
test packets; the method comprising:
set up the network service path through at least one network function that would block test packets;
providing a bypass mechanism to bypass test packets around the at least one network function that would block test packets;
and

send test packets through a modified network service path that includes the bypass mechanism around the at least one network
function that would block test packets wherein:

a first switch is placed on a first side of the at least one network function;
a second switch is placed on an opposite side of the at least one network function;
non-test packets that reach the first switch are passed to the at least one network function and passed by the at least one
network function to the second switch; and test packets that reach the first switch are passed through the bypass mechanism
around the at least one network function and provided to the second switch; and

if test packets do not reach an opposite end of the modified network service path;
then begin process to diagnose a problem;
else in-service verification of the continuity for the network service path is deemed verified.

US Pat. No. 9,977,202

OPTICAL MULTICHANNEL TRANSMISSION AND/OR RECEPTION MODULE, IN PARTICULAR FOR HIGH-BITRATE DIGITAL OPTICAL SIGNALS

ADVA Optical Networking S...

1. An optical multichannel transmission and/or reception module, in particular for high-bitrate digital optical signals, comprisinga housing having multiple optical input ports and/or optical output ports and containing an electric assembly and an essentially flat opto-electric module connected electrically to the electric assembly,
wherein multiple electro-optic transmission elements and/or multiple opto-electric reception elements are located on or in the opto-electric module,
wherein the opto-electric module has an optical coupling area on one of its surfaces that is connected to the respective first ends of multiple optical waveguides, and wherein the opto-electric module has multiple optic paths for optical connection of each first end of an optical waveguide with an assigned electro-optic transmission element and/or an associated opto-electric reception element,
wherein the first ends of the optical waveguides are connected perpendicularly to the coupling area of the opto-electric module,
wherein the opto-electric module is located in a module plane that runs transversely to a longitudinal axis of the housing,
wherein the longitudinal axes of the housing and a module plane have an angle ? in a range of 20°???50°, preferably in a range of 30°???45°, and
wherein an inner height of the housing, in at least one axial area in which the opto-electric module is provided and in at least one plane out of all planes that lie perpendicular to an imaginary tilt axis of the opto-electric module, is less than a lengthwise extent of the opto-electric module's cross-section in that plane.

US Pat. No. 9,960,822

METHOD AND SYSTEM FOR FACILITATING COORDINATED MULTIPOINT COMMUNICATION FOR A CLIENT DEVICE IN A WIRELESS COMMUNICATION NETWORK

Adva Optical Networking S...

1. A method for facilitating coordinated multipoint communication for a client device in a wireless communication network comprising a plurality of base stations and a backhaul network connecting the plurality of base stations, the method comprising the steps of:providing a plurality of network interface devices for measuring synchronization accuracy in the backhaul network, wherein each of the plurality of network interface devices is assigned to one of the plurality of base stations and arranged in close proximity to the respective base station;
creating an actual coverage map for the coordinated multipoint communication by analyzing data transfer between the client device and the plurality of base stations;
analyzing the created actual coverage map to determine whether the backhaul network is sufficient for a selected coordinated multipoint technique;
if the backhaul network is not sufficient for the selected coordinated multipoint technique, determining one or more key performance indicators indicating the performance of the backhaul network by means of the plurality of network interface devices;
creating a conditional coverage map on the basis of the determined one or more key performance indicators;
comparing the actual coverage map with the conditional coverage map to determine whether the actual coverage map matches the conditional coverage map;
reconfiguring the wireless communication network if the actual coverage map does not match the conditional coverage map.

US Pat. No. 9,800,342

OPTICAL WDM TRANSMISSION NETWORK

Adva Optical Networking S...

1. An optical WDM transmission network comprising at least one optical line terminal, a remote node and a plurality of optical
network units, wherein
(a) the at least one optical line terminal is connected to the optical remote node via an optical WDM path,
(b) each optical network unit is connected to the optical remote node via an optical distribution path,
(c) the optical remote node comprising a cyclic N×N arrayed waveguide grating has connection ports for connecting the at least
one optical line terminal and the plurality of optical network units to the optical remote node, the cyclic N×N arrayed waveguide
grating having wavelength-depending routing properties being configured in such a way that bidirectional hub links via the
optical remote node between the at least one optical line terminal and each of the optical network units can be established
and being further configured in such a way that direct bidirectional star links via the optical remote node between one or
more selected optical network unit and at least one of the other optical network unit can be established, the wavelength-dependent
routing properties of the cyclic N×N arrayed waveguide grating being essentially identical in a first optical band, a second
optical band, and a third optical band, the first, second and third optical band having no overlap,

(d) wherein, for establishing the hub links, the at least one optical line terminal creates optical downstream channel signals
at first wavelengths lying in the first optical band and each of selected one or more optical network units creates an optical
upstream channel signal at a dedicated second wavelength lying in the second optical band and wherein, for establishing the
direct star links, each of selected one or more optical network units creates an optical star link channel signal at a dedicated
third wavelength lying in the third optical band,

(e) each of the selected optical network units further comprising a first optical band filter device comprising a common port
and a first band port and a second band port, a first optical receiver connected to the first band port and a second optical
receiver coupled to the second band port, the first optical receiver being adapted to receive an optical downstream channel
signal lying in the first optical band for establishing a hub link and the second optical receiver adapted to receive an optical
channel signal lying in the third optical band for establishing a direct star link,

(f) wherein the optical band filter device is configured to route an optical channel signal supplied to the common port and
lying in the first optical band to the first band port and to route an optical channel signal supplied to the common port
and lying in the third optical band to the second band port,

(g) wherein the optical line terminal and each optical network unit have a connection port comprising a separate output port
and a separate input port, wherein the output port of the optical line terminal and each output port of an optical network
unit are connected to a dedicated front port of the cyclic N×N arrayed waveguide grating and wherein the input port of the
optical line terminal and each input port of an optical network unit are connected to a dedicated back port of the cyclic
N×N arrayed waveguide grating by a separate optical path.

US Pat. No. 10,090,917

METHOD AND APPARATUS FOR AUTOMATIC DETERMINATION OF A FIBER TYPE

ADVA OPTICAL NETWORKING S...

1. A method for automatic determination of a fiber type of at least one optical fiber span used in a link of an optical network, the method comprising the steps of:measuring a length of said optical fiber span;
measuring a fiber chromatic dispersion of said optical fiber span;
determining a fiber dispersion profile of said optical fiber span on the basis of the measured length and the measured fiber chromatic dispersion; and
determining a fiber category and/or a specific fiber type of said optical fiber span depending on the determined fiber dispersion profile,
wherein the fiber chromatic dispersion of said optical fiber span is measured for at least one signal wavelength of a signal transmitted through said optical fiber span within a predetermined signal transmission band or for multiple signal wavelengths of signals transmitted through said optical fiber span inside or outside a predetermined signal transmission band.

US Pat. No. 10,122,460

METHOD AND APPARATUS FOR AUTOMATIC COMPENSATION OF CHROMATIC DISPERSION

ADVA Optical Networking S...

1. A chromatic dispersion compensation apparatus for automatic compensation of chromatic dispersion, CD, of signals transmitted via an optical link at predetermined wavelengths of WDM channels within a predetermined band of a WDM system, the chromatic dispersion compensation apparatus having a signal input and a signal output, and comprising:an amplifier connected to the signal input for amplifying optical signals received at the signal input; and
a tapping unit coupled to the signal output and receiving the amplified optical signals from the amplifier via an internal signal line coupled to the amplifier, the tapping unit adapted such that the amplified optical signals output by the amplifier can travel through the tapping unit to the signal output and adapted to tap the amplified optical signals received by the chromatic dispersion compensation apparatus at its signal input via the optical link at predetermined wavelengths and adapted to supply the tapped optical signals to an optical coherent receiver adapted to tune its local oscillator to selected WDM channels to generate corresponding analog electrical signals of the different WDM channels which are sampled by an analog digital converter, ADC, to provide digital signal samples of the selected WDM channels processed by a digital signal processor, DSP, of the chromatic dispersion compensation apparatus to calculate an estimate residual chromatic dispersion value of the received optical signals,
wherein a tuneable dispersion compensation module, TDCM, of the chromatic dispersion compensation apparatus is set to perform an optical compensation of a residual chromatic dispersion, rCD, of the received optical signals depending on the calculated estimate residual chromatic dispersion value of the received optical signals.

US Pat. No. 10,090,919

METHOD AND APPARATUS FOR LOGGING TRANSIENT EVENTS OF AN OPTICAL FIBER SPAN WITHIN A FIBER OPTIC SYSTEM

ADVA OPTICAL NETWORKING S...

1. A method for logging transient events of an optical fiber span, OFS, within a fiber optic system, the method comprising the steps of:sampling measured values of at least one signal parameter of an optical signal transported through said optical fiber span, OFS;
processing the sampled measurement values to detect an occurrence of a transient event during transport of the optical signal through said optical fiber span, OFS; and
providing each detected transient event with a time stamp for correlation with other monitored events within said fiber optic system,wherein a signal parameter difference is determined continuously by comparing a previous signal parameter value from a current signal parameter value, andwherein if a predetermined number of consecutively determined signal parameter differences is lower than a signal parameter difference threshold a steady state signal parameter is computed on the basis of the consecutively determined signal parameters.

US Pat. No. 9,923,756

MAINTENANCE ENTITY GROUP END POINT OF A SUBNETWORK WITHIN A MULTI-DOMAIN NETWORK

ADVA OPTICAL NETWORKING S...

1. A multi-domain network comprising:
a plurality of subnetworks including at least two operator networks;
at least two External Network-to-Network Interfaces, ENNIs, one for each operator network, at an interface between the operator
networks; and

a Maintenance Entity Group, MEG, comprising MEG End Points, MEPs, of the MEG that span over the ENNIs;
wherein the MEPs are configured to avoid MEG level overlap between the operator networks by tunneling Service Operation Administration
Maintenance (SOAM) frames received on a passive Service Access Point (SAP) of the MEP to a peer MEP by encapsulating SOAM
frames received by the MEP and forwarding the encapsulated SOAM frames to the peer MEP of the MEP over the interface between
the operator networks;

wherein the passive SAP of the MEP is adapted to receive the SOAM frames and an active SAP is adapted to forward after encapsulation
by the MEP the encapsulated SOAM frames to the peer MEP of said MEP within the same MEG.

US Pat. No. 9,954,693

SYSTEM AND METHOD OF ASSESSING LATENCY OF FORWARDING DATA PACKETS IN VIRTUAL ENVIRONMENT

1. A method of assessing latency of forwarding data packets in virtual environment, the method implemented on a computing platform and comprising:upon specifying a transmitting monitoring point associated with a first virtual function (VF) corresponding to an ingress virtual port of a virtualized platform (VP) running on the computing platform and a receiving monitoring point associated with a second VF corresponding to an egress virtual port of a virtualized platform (VP) running on the computing platform, generating packet signatures (SGs) for at least part of data packets eligible for monitoring, thus giving rise to monitored departing packets, each uniquely characterized by respective departing packet signature SGD and to monitored arriving packets each uniquely characterized by respective arriving packet signature SGA;
maintaining a first data structure comprising a plurality of records related to monitored departing packets associated with the first VF, each record among the plurality of records further informative of, at least, SGD and registered departure time TD of a given departing packet, wherein departure time TD is indicative of departure time of the given departing packet from the first monitoring point Tx;
responsive to registering arriving time TA of a given monitored arriving packet SGA associated with the second VF, searching the first data structure for a record matching a matching condition, wherein the matching condition at least comprises requirement that SGD=SGA, and wherein arriving time TA is indicative of arriving time of the given arriving packet at the receiving monitoring point;
modifying the matching record, when found, to become informative of latency ?T=TA?TD and adding the modified matching record to a second data structure storing one or more modified records, each informative of latency measured for forwarding a respective packet from the first monitoring point to the receiving monitoring point; and
enabling using data in the second data structure for assessing latency of forwarding packets from the ingress virtual port to the egress virtual port of the virtualized platform.

US Pat. No. 9,838,112

METHOD AND APPARATUS FOR PROVIDING A DIFFERENTIAL LATENCY

ADVA OPTICAL NETWORKING S...

20. A method for providing a differential latency between an upstream transmission and a downstream transmission of optical
data signals of a bidirectional payload channel at upstream and downstream wavelengths within a wavelength band via an optical
transmission link, said optical transmission link comprising an optical fiber having a group index proportional to the round
trip delay depending on a signal wavelength, the method comprising the steps of:
(a) measuring round trip delays of at least two optical measurement signals having different measurement wavelengths; wherein
the optical measurement signals are inserted at a near end of the optical transportation link transported through the optical
transportation link to a far end of the optical transportation link and at least partially reflected at the far end of the
optical transmission link back to the near end of the optical transmission link to measure the round trip delays of the at
least two optical measurement signals, wherein the measurement wavelengths of the measurement signals are preconfigured or
tuned to be in a wavelength region where the amplitude of the measurement signals transported through the fiber of the optical
transportation link and reflected back is sensitive to attenuation caused by water absorption and/or bending of a fiber of
an optical transportation link;

(b) deriving an upstream delay of the at least one optical data signal at an upstream wavelength from the at least two measured
round trip delays of the measurement signals; and deriving a downstream delay of the at least one optical data signal at a
downstream wavelength from the at least two measured round trip delays of the measurement signals by linear or non-linear
interpolation of the measured round trip delays of the measurement signals; and

(c) calculating the differential delay latency on the basis of the derived upstream delay and the derived downstream delay
by subtracting the derived upstream delay from the derived downstream delay.

US Pat. No. 9,917,640

OPTICAL COUPLER DEVICE AND AN OPTICAL MONITORING DEVICE FOR MONITORING ONE OR MORE OPTICAL POINT-TO-POINT TRANSMISSION LINKS

Adva Optical Networking S...

1. An optical coupler device, especially for monitoring purposes in an optical point-to-point transmission link, comprising:
(a) a first, a second and a third optical port;
(i) the optical coupler device being configured to transmit a first optical signal received at the first optical port to the
second optical port and to transmit a second optical signal received at the second optical port to the first and third optical
port according to a monitoring split ratio with respect to the optical power of the second optical signal the first and second
optical signal having a wavelength lying in a first optical band; and

(ii) the optical coupler device being further configured to transmit a third and a fourth optical signal received at the third
and the second optical port to the respective other optical port, the third and fourth optical signal having a wavelength
lying in a second optical band;

wherein
(b) the optical coupler device is configured to be controllable with respect to the monitoring split ratio,
(c) the optical coupler device further comprises a control means adapted to receive a control signal and configured to control
the optical coupler device with respect to the monitoring split ratio in such a way that

(i) in a first work mode the second optical signal is transmitted to the first optical port, only, and
(ii) in a second work mode a major portion of the optical power of the second signal is transmitted to the first optical port
and a minor portion of the optical power of the second signal is transmitted to the third optical port,

(d) the optical coupler device further comprises:
(i) a wavelength-independent optical power splitter having a common port and a first and a second splitting port, the optical
power splitter being controllable with respect to the splitting ratio, and

(ii) a first and a second optical diplexer each having a WDM port and a first and a second band port each optical diplexer
being configured to receive an optical signal in the first and second optical band at the first and second band port, respectively,
and to output the optical signals at the WDM port, and to output optical signals in the first and second optical band which
are received at the WDM port at the first and a second band port, respectively,

wherein the first splitting port of the optical power splitter is connected to or defines the first optical port of the optical
coupler device, wherein the second splitting port is connected to the first band port of the first optical diplexer, wherein
the common port of the optical power splitter is connected to the first band port of the second optical diplexer, wherein
the second band port of the second optical diplexer is connected to the second band port of the first optical diplexer, wherein
the WDM port of the second optical diplexer is connected to or defines the second optical port of the optical coupler device,
and wherein the WDM port of the first optical diplexer is connected to or defines the third optical port of the optical coupler
device.

US Pat. No. 10,113,905

RANDOM LIGHT COLLECTOR DEVICE

ADVA Optical Networking S...

1. A random light collector device comprising(a) a reflecting cavity configured to enclose a random light source that randomly transmits photons in essentially the whole solid angle of 4? steradian, the reflecting cavity having an inner wall adapted to reflect the photons in such a way that at least a portion of once or multiply reflected photons is directed to an output port of the reflecting cavity and
(b) a guiding means for directing the reflected photons and photons which are directly emitted to the output port and to a photodetector,
(c) wherein the guiding means is a hollow tube having an inner wall adapted to reflect the photons, and
(d) wherein a first end of the hollow tube is connected to or positioned adjacent to the output port of the reflecting cavity and wherein the photodetector is provided within the hollow tube or directly at or sufficiently close to a second end thereof in such a way that a sensitive area of the photodetector covers the whole cross-section of the second end.

US Pat. No. 10,069,589

METHOD AND APPARATUS FOR INCREASING A TRANSMISSION PERFORMANCE OF A HYBRID WAVELENGTH DIVISION MULTIPLEXING SYSTEM

ADVA OPTICAL NETWORKING S...

1. A hybrid wavelength division multiplexing system, wherein one or more intensity modulated signals is co-propagated with one or more phase modulated signals, said one or more phase modulated signals is propagated on different wavelengths than the one or more intensity modulated signals, andwherein an extinction ratio of the one or more intensity modulated signals is reduced to minimize a cross-phase modulation impact on the co-propagating one or more phase modulated signals.

US Pat. No. 10,061,089

FIBER OPTIC COMPONENT HOLDING DEVICE FOR FIBERS IN SIDE-BY-SIDE CONTACT

ADVA OPTICAL NETWORKING S...

1. A holding device for holding at least two cylindrical fiber optical components, each having a diameter, the holding device comprising at least one stackable body, each stackable body having at least one recess, the recess defining a width between opposite ends thereof that is no greater than twice the diameter of two cylindrical fiber optical components, the recess being configured to receive and to hold the two cylindrical fiber optical components together in side-by-side contact within the recess and in contact with said opposite ends of the recess, wherein said recess defines an opening between said opposite ends through which the two cylindrical fiber optical components are inserted into the recess, said opening having a width that is less than the width of said recess.

US Pat. No. 10,171,326

METHOD AND APPARATUS FOR ESTIMATING A MAXIMUM TIME INTERVAL ERROR IN A DATA TRANSMISSION NETWORK

ADVA Optical Networking S...

1. A method for estimating a maximum time interval error in a data transmission network, the method comprising:(a) receiving at a processing device a plurality of data samples from the data transmission network over a sampling period;
(b) with the processing device, comparing a duration of the sampling period to a sampling period time threshold;
(c) if the duration of the sampling period is less than or equal to the sampling period time threshold, processing the plurality of data samples with the processing device so as to calculate in real time a maximum time interval error for the sampling period, wherein processing the plurality of data samples so as to calculate in real time the maximum time interval error includes,
(i) comparing a quantity of the plurality of data samples received over the sampling period to a data sample quantity threshold value;
(ii) if the quantity of the plurality of data samples received over the sampling period is less than or equal to the data sample quantity threshold value, directly storing the plurality of data samples received over the sampling period and calculating the maximum time interval error from the stored plurality of data samples; and
(iii) if the quantity of the plurality of data samples received over the sampling period exceeds the data sample quantity threshold value, creating a tree data structure on the basis of the plurality of data samples received over the sampling period, storing the tree data structure, and calculating the maximum time interval error from the stored tree data structure; and
(d) if the duration of the sampling period exceeds the sampling period time threshold, dividing the sampling period into a number of sub-intervals, processing the data samples received in each respective sub-interval with the processing device to produce a respective intermediate result for each respective sub-interval, storing each respective intermediate result directly after the respective intermediate result is produced, and processing the stored intermediate results with the processing device so as to produce a maximum time interval error estimate.

US Pat. No. 10,433,325

METHOD FOR SCHEDULING A TRANSMISSION OF PACKETS WITHIN A NETWORK

ADVA OPTICAL NETWORKING S...

1. A method for scheduling a transmission of packets within a network the method comprising:using a common periodic time window, having a congestion protected section, partitioned into time slots, including time slots dedicated to packets being sensitive to a delay variation, wherein a latency introduced by the used common periodic time window, is deterministic and is automatically compensated to minimize a delay variation within the network.

US Pat. No. 10,228,519

OPTICAL CONNECTING SYSTEM FOR CONNECTING A FIRST AND A SECOND OPTICAL DEVICE

ADVA Optical Networking S...

1. An optical connecting system for connecting a first and a second optical device, the optical connecting system comprising(a) a first and a second multi-fiber device connector comprised in the first and second optical device, respectively, and
(b) a multi-fiber optical connection cable comprising a plurality of optical fibers and having a first and a second multi-fiber cable connector at a respective first and second end thereof and being adapted to be connected to the first and second multi-fiber device connector,
(c) wherein the first and second optical devices are configured to transmit to and/or receive from the respective other optical device one or more wanted optical data signals via selected optical fibers of the multi-optical fiber connection cable,
wherein
(d) the first optical device is configured to supply a first optical connection signal to a transmit control port of the first multi-fiber device connector and
(e) wherein the second optical device is configured to receive the first optical connection signal that is transmitted through a respective optical fiber of the multi-fiber optical connection cable to a receive control port of the second multi-fiber device connector,
(f) wherein no wanted optical data signal is transmitted over the optical path that guides the first optical connection signal, and
(g) wherein the second optical device is configured to detect whether the first optical connection signal received matches one or more predetermined criteria, wherein the second optical device is configured to assume a correct connection to the first optical device via the multi-fiber optical connection cable if the one or more predetermined criteria are matched.

US Pat. No. 10,367,597

METHOD AND CENTRAL NETWORK DEVICE FOR ESTABLISHING AN EMBEDDED OPTICAL COMMUNICATION CHANNEL IN AN OPTICAL WDM TRANSMISSION SYSTEM

ADVA Optical Networking S...

1. A method for establishing an embedded optical communication channel in an optical wavelength division multiplexing (WDM) transmission system, the optical WDM transmission system comprising a plurality of first channel transceivers at a first end of a bidirectional optical WDM transmission path, a plurality of second channel transceivers at a second end of the bidirectional optical WDM transmission path and a central network device connected to the bidirectional optical WDM transmission path, each first channel transceiver being configured to create and transmit a first optical channel signal, in a respective downstream channel, to the second end of the bidirectional optical WDM transmission path and to receive a second optical channel signal created by a second channel transceiver and each second channel transceiver being configured to create and transmit a second optical channel signal, in a respective upstream channel, to the first end of the bidirectional optical WDM transmission path and to receive a first optical channel signal created by a first channel transceiver, the method comprising:(a) creating, at the central network device, a broadband optical signal having an optical spectrum which covers at least a group of neighboring or all optical upstream channels of the optical WDM transmission system, the optical power of the broadband optical signal being modulated according to a low-frequency modulation signal in such a way that there is no or no unacceptable spectral overlap of the low-frequency spectrum of the low-frequency modulation signal and the modulation spectra of the second optical channel signals;
(b) supplying the broadband optical signal, at a predefined position between the first and the second end, to the bidirectional optical WDM transmission path in the direction of the first end thereof;
(c) transmitting the broadband optical signal and the plurality of second optical channel signals, if any, to an optical demultiplexer device, which is connected to the first end of the bidirectional optical WDM transmission path and which optically filters and spatially separates the incoming optical signals according to optical channel bandwidths predefined for the optical WDM transmission system;
(d) transmitting, from the optical demultiplexer device to each of the plurality of channel transceivers, an optical signal consisting of a dedicated second optical channel signal, if any, and a filtered broadband optical signal;
(e) receiving, at each first channel transceiver, the optical signal and creating a corresponding electrical receive signal comprising a second electrical channel signal corresponding to the dedicated second optical channel signal and an electrical signal corresponding to the filtered broadband optical signal; and
(f) extracting, at each first channel transceiver, the electrical signal corresponding to the filtered broadband optical signal from the electrical receive signal and detecting whether the electrical signal contains information intended for the respective first channel transceiver.

US Pat. No. 10,313,877

METHOD AND SYSTEM FOR FACILITATING PARTICIPATION OF AN INTERMEDIARY NETWORK DEVICE IN A SECURITY GATEWAY COMMUNICATION BETWEEN AT LEAST ONE BASE STATION AND A CORE NETWORK PORTION IN A CELLULAR COMMUNICATION NETWORK

ADVA Optical Networking S...

1. A method for facilitating participation of an intermediary network device in a security gateway communication between at least one base station and a core network portion in a cellular communication network, the method comprising the steps of:(a) establishing a secure channel between the intermediary network device and a security gateway connecting between the at least one base station and the core network portion, and wherein a security gateway communication is established between the at least one base station and the core network portion via the security gateway, wherein the intermediary network device is arranged in close proximity to the at least one base station and is configured to inject traffic in the cellular communication network;
(b) transmitting a virtual machine instantiation command generated by software running in the security gateway to the intermediary network device over the secure channel;
(c) instantiating a virtual machine on the intermediary network device responsive to the virtual machine instantiation command;
(d) when establishing a secure communication session between the at least one base station and the core network portion via the security gateway for the first time, establishing an Internet Key Exchange communication between the virtual machine and the security gateway and transmitting session keys from the security gateway to the virtual machine during the Internet Key Exchange communication;
(e) establishing an IPsec tunnel between the virtual machine and the security gateway using the transmitted session keys for facilitating participation of the network interface device in the secure communication session.

US Pat. No. 10,313,048

METHOD AND SYSTEM FOR ESTABLISHING AT LEAST TWO BIDIRECTIONAL COMMUNICATION LINKS USING COHERENT DETECTION

ADVA Optical Networking S...

1. A method for establishing at least two bidirectional communication links using coherent detection, the method comprising the steps of(a) providing, at each of a first and a second side of at least a first and a second optical path, at least two optical transceiver modules, wherein each optical transceiver module comprises an optical modulator and a coherent optical receiver, each optical modulator having an input port, a modulation port and an output port and each coherent optical receiver having a local oscillator port, a receiving port and an output port, wherein an input port of each optical transceiver module is connected by an optical 1×2 power splitter device to the optical modulator input port and the coherent optical receiver input port,
(b) creating, at each of the first and second sides of the optical paths, a multiplexed optical continuous-wave (CW) signal comprising at least two optical CW signals having differing wavelengths, wherein the CW signals created at the first side and the CW signals created at the second side have the same or approximately the same wavelengths,
(c) supplying the multiplexed optical CW signal to the input port of each optical transceiver module,
(d) creating, at an output port of each optical modulator, which defines an output port of the optical transceiver module, a modulated optical signal which includes information of one or more modulation signals that are supplied to the modulation port of the corresponding optical modulator,
(e) creating, at each of the first and second sides of the optical paths, at least two first and second optical transmit signals by optically filtering each of the modulated optical signals in such a way that only a single wavelength remains, and routing each at least one pair of a dedicated first and second optical transmit signal that is used to establish the at least two bidirectional communication links to a dedicated one of the at least first and second optical paths, wherein the first and second optical transmit signals of each pair have differing wavelengths and wherein the first and second optical transmit signals that are transmitted in the same direction over the same optical paths have differing wavelengths,
(f) routing, at each of the first and second sides of the optical paths, each of the at least two first and second optical transmit signals to a receiving port of a dedicated coherent optical receiver, and
(g) creating, at the output port of each coherent optical receiver, one or more electrical receive signals by mixing the respective optical transmit signal that is supplied to the receiving port and the multiplexed optical CW signal.

US Pat. No. 10,211,943

METHOD AND APPARATUS FOR MANAGING A FREQUENCY SPECTRUM IN A WAVELENGTH DIVISION MULTIPLEXING NETWORK

ADVA OPTICAL NETWORKING S...

1. A method for managing a frequency spectrum in a colorless wavelength division multiplexing (WDM) ring or mesh network including a plurality of reconfigurable optical add/drop multiplexers (ROADM) having adjustable passband, the ROADMs being connected through optical fiber spans to allow bidirectional optical transmission of optical signals clockwise or counterclockwise in the ring or mesh network, each ROADM being associated with a transceiver including a monitoring unit monitoring the performance characteristics of the individual carriers continuously during operation of the WDM network and then notifying to a controller of the WDM network through a data link, the method comprising:adjusting, by the controller, a frequency offset between individual carriers of a superchannel, for each individual carrier, depending on performance characteristics of the individual carriers;
wherein a frequency offset between neighboring individual carriers is adjusted, by the controller, for each carrier individually depending on a performance characteristic of the individual carrier and on the performance characteristics of respective neighboring carriers including the bitrates of neighboring channels, the modulation depth of the neighboring channels, and depending on the original distance of frequency spacing between the channels.

US Pat. No. 10,349,291

METHOD AND SYSTEM FOR ESTABLISHING A SELF-ORGANIZED MOBILE CORE IN A CELLULAR COMMUNICATION NETWORK

Adva Optical Networking S...

1. A method for establishing a self-organized emergency mobile core in a cellular communication network, the cellular communication network having a core element and a Radio Access Network (RAN), the method comprising the steps of:storing program code for implementing core network functionality on stationary network elements that are part of the RAN of the cellular communication network allowing to host virtual network functionality, wherein the program code for implementing core network functionality stored on each stationary network element remains inactive when the core element is available, wherein the core network functionality includes a connectivity gateway functionality, a mobility management entity functionality, and a home subscriber server functionality, wherein the stationary network elements comprise all base stations of the RAN;
detecting an emergency event within the cellular communication network resulting in an unavailability of the core element;
starting operating, on at least one stationary network element, the program code for implementing core network functionality in order to establish a self-organized emergency mobile core in response to the detected emergency event;
detecting if there are one or more undamaged base stations in response to the detected emergency event;
if there are one or more undamaged base stations, creating a coverage map of a remaining network by means of the one or more undamaged base stations discovering each other via available active interconnections;
determining if at least one of the one or more undamaged base stations has connectivity to the core element; and
starting communication of the client device with the core element in the remaining network, if at least one of the one or more undamaged base stations has connectivity to the core element.

US Pat. No. 10,404,397

WAVELENGTH DIVISION MULTIPLEXED TELECOMMUNICATION SYSTEM WITH AUTOMATIC COMPENSATION OF CHROMATIC DISPERSION

ADVA OPTICAL NETWORKING S...

1. A wavelength division multiplexed (WDM) telecommunication system with automatic compensation of chromatic dispersion in a predetermined wavelength band, said WDM telecommunication system comprising:a) a probe signal detection unit at a receiver side adapted to detect amplitude modulated probe signals having respective probe signal wavelengths generated by a probe signal generation unit at a transmitter side with a predetermined relative phase difference based on a switchable modulation frequency before being transmitted through an optical link to said receiver side, wherein a wavelength spacing between the probe signal wavelengths is variable; and
b) a chromatic dispersion compensation unit, comprising a tunable dispersion compensation module comprising an algorithm, wherein said tunable dispersion compensation module is adapted to execute said algorithm to completely compensate the chromatic dispersion in response to a relative phase difference of the amplitude modulated probe signals detected by said probe signal detection unit at the receiver side until the relative phase difference at the receiver side equals that at the transmitter side;
c) wherein said probe signal generation unit is adapted to generate probe signals with equal modulation frequency and with the predetermined relative phase difference; and
d) wherein the algorithm, in order to make the relative phase difference at the receiver side equal that at the transmitter side, carries out the following steps S61-S66:
in a first step S61: a first laser diode provides a first amplitude modulated probe signal, AMPS1, at a fixed reference wavelength ?ref;
in a further step S62, the wavelength of the other amplitude modulated probe signal, AMPS2, generated by a second laser diode of the probe signal generation unit is tuned to a wavelength ?x;
in a further step S63, the phase difference ??x between the received amplitude modulated probe signals AMPS1, AMPS2 is calculated at the receiver side;
in a further step S64, the second laser diode providing the second probe signal is tuned to another wavelength ?y;
then, in a further step S65, the phase difference ??y between the probe signal at the reference wavelength ?ref and the probe signal at the tuned wavelength ?y is calculated; and
in step S66, the tunable dispersion compensation module is tuned until the phase difference ??x is equal to the calculated phase difference ??y; wherein
steps S61 and S64 are iterated to improve the accuracy of the chromatic dispersion compensation.

US Pat. No. 10,256,959

METHOD AND APPARATUS FOR GENERATING A TONE SIGNAL

ADVA OPTICAL NETWORKING S...

1. A method for generating a tone signal having a tone frequency,wherein the method comprises the following steps:
supplying a binary bit stream having a mark pattern with a supply bit rate, to a signal filter unit; and
filtering the supplied binary bit stream by said signal filter unit to generate the tone signal, wherein the mark pattern of the binary bit stream supplied to said signal filter unit is adapted to minimize a ratio of the supply bit rate to the tone frequency of the generated tone signal and wherein the ratio of the supply bit rate to the tone frequency of the tone signal is in a range between 3.0 and 5.5.

US Pat. No. 10,270,534

METHOD AND TRANSMITTER DEVICE FOR CREATING AN OPTICAL TRANSMIT SIGNAL

ADVA Optical Networking S...

7. An optical transmitter device for creating an optical transmit signal comprising(a) an electrical transmitter device, wherein the electrical transmitter device creates an electrical discrete multi-tone signal according to digital input data carrying information to be transmitted, the discrete multi-tone signal comprising a plurality of electrical partial signals, each electrical partial signal consisting of a sub-carrier at a predetermined sub-carrier frequency which is modulated according to a dedicated modulation scheme, wherein a dedicated portion of the digital input data is included in the dedicated modulation scheme, and
(b) a modulated optical source, wherein the modulated optical source creates an optical signal by using the electrical discrete multi-tone signal as modulating signal for amplitude-modulating an optical carrier signal,whereinan optical bandpass filter device is provided which is configured to filter the optical signal in order to create a single-sideband or vestigial sideband optical transmit signal, and
wherein the optical bandpass filter device has a filter function adapted to attenuate optical frequency components remote from the optical carrier less than optical frequencies components closer to the optical carrier in order to pre-emphasize higher frequency components of the modulating signal.

US Pat. No. 10,432,336

SYSTEM AND METHOD OF SYNCHRONIZING A DISTRIBUTED CLOCK IN A PACKET-COMPATIBLE NETWORK

ADVA Optical Networking S...

1. A method of operating a computer-based controller being in data communication with one or more first computer-based clock nodes via a control path, the one or more first clock nodes operating in a time distribution network (TDN) operating in compliance with a time-transfer protocol, the method comprising:continuously receiving, by the controller via the control path from each of the one or more first clock nodes, first timestamp-related data, the first timestamp-related data received from a given clock node being informative of master and slave timestamps associated with the given clock node;
using the received first timestamp-related data associated with a given clock node to generate, for each of the one or more clock nodes, clock-recovery control data with respect to the given clock node, the generated clock-recovery control data comprising data usable for phase and frequency recovery;
continuously sending the generated clock-recovery control data, via the control path, to each of the one or more clock nodes;
continuously receiving, by the controller via the control path from each of the one or more first clock nodes, first PTP announce messages generated by the one or more first clock nodes, each first PTP announce message associated with a clock port of respective first clock node;
processing, at least, the received first PTP announce messages using techniques defined by BMCA (Best Master Clock Algorithm) protocol to continuously generate a clock distribution topology to be implemented; and
sending to the one or more first clock nodes configuration commands specifying quality and priority of respective PTP ports in accordance with the generated clock distribution topology.

US Pat. No. 9,473,246

METHOD AND TUNING DEVICE FOR TUNING A TUNABLE OPTICAL TRANSMITTER TO A PREDETERMINED TARGET WAVELENGTH

ADVA Optical Networking S...

1. A method for tuning a tunable optical transmitter to a target wavelength, the tunable optical transmitter being included
in a plurality of optical transmitters connected to a first end of an optical WDM transmission link, the method comprising:
(a) supplying at least one tuning signal to the tunable optical transmitter to control the tunable optical transmitter to
create an optical calibration signal according to nominal tuning information comprising at least one parameter of the at least
one tuning signal, wherein

(i) the optical calibration signal has a wavelength lying within a secure wavelength range which excludes any optical channel
wavelength range predefined for transmitting an optical channel signal by another one of the plurality of optical transmitters
in the direction of the optical calibration signal over the WDM transmission link, and

(ii) the nominal tuning information is determined from a known nominal wavelength dependency characterizing the wavelength
dependency of the tunable optical transmitter on the at least one parameter of the at least one tuning signal;

(b) determining calibration information by directly or indirectly measuring, within the secure wavelength range, a deviation
between an actual wavelength dependency of the tunable optical transmitter and the nominal wavelength dependency; and

(c) controlling the tunable optical transmitter to create an optical channel signal according to target tuning information
which is determined from a corrected nominal wavelength dependency corrected with respect to the nominal wavelength dependency
based on the calibration information, the optical channel signal having a wavelength within a predetermined acceptable tolerance
to the target wavelength.