Abstract:
There is provided a method of clock management in a packet data network (PDN) implementing a time-transfer protocol and a clock controller configured to operate therein. The clock controller is configured to: obtain topology data informative of a master clock node and a slave clock node constituting end points of a PTP path in the PDN and further informative of at least part of transit nodes of said PTP path; periodically obtain data informative of queue size and link rate characterizing, during a collection period, the at least part of transit nodes in master-slave (MS) and slave-master (SM) directions; for each collection period, use the obtained queue-related data to estimate queue-induced delay asymmetry of the PTP path; and send the estimated value of queue-induced delay asymmetry to the slave node, the estimated value to be used by a clock residing on the slave node as delay asymmetry correction parameter.
Abstract:
A holding device for holding cylindrical fiber optical components comprising at least one stackable body each having at least one recess adapted to receive cylindrical fiber optical components.
Abstract:
The invention relates to an optical interference filter device which defines 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 the same free spectral range as the first periodic frequency response between a second filter output port and the filter input port. The first and second periodic filter frequency responses are shifted versus each other by a predetermined optical frequency distance.
Abstract:
An apparatus for monitoring a performance of an Ethernet data stream, EDS, said apparatus comprising: an evaluation unit adapted to evaluate sync headers and block type fields of line code vectors of the Ethernet data stream, EDS; and a counter unit adapted to increment at least one performance counter in response to the evaluated sync header and the evaluated block type field of each line code vector of the Ethernet data stream, EDS.
Abstract:
A method for establishing an embedded optical communication channel in an optical WDM transmission system including: creating, at the central network device, a broad-band optical signal, supplying the broadband optical signal, transmitting the broadband optical signal and the plurality of second optical channel signals to an optical demultiplexer device, transmitting an optical signal consisting of a dedicated second optical channel signal and a filtered broadband optical signal; receiving the optical signal and creating a corresponding electrical receive signal and extracting 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.
Abstract:
Disclosed is an optical multichannel transmission and/or reception module, in particular for high-bitrate digital optical signals, with a 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. Multiple electro-optic transmission elements and/or multiple opto-electric reception elements are located on or in the opto-electric module. 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. The opto-electric module has multiple optic paths for optical connection of each first end of an optic waveguide with an associated electro-optic transmission element and/or an associated opto-electric reception element.
Abstract:
The subject matter described herein includes using a path computation element communication protocol (PCEP) as a signaling protocol during dynamic service provisioning in networks. According to one aspect of the subject matter described herein, a network uses a hard state point-to-point protocol as a signaling protocol during dynamic service provisioning in a control plane of the network. In one implementation, the point-to-point protocol is a path computation element communication protocol (PCEP).
Abstract:
A Maintenance Entity Group, MEG, End Point, MEP, of a subnetwork within a multi-domain network, said MEP comprising an encapsulation unit configured to encapsulate SOAM frames received by a passive Service Access Point, SAP, of the MEP and a decapsulation unit configured to decapsulate encapsulated SOAM frames received by an active Service Access Point, SAP, of the MEP.
Abstract:
A method for facilitating the establishment of a virtual private network in a cellular communication network comprising the steps of: arranging a network interface device in close proximity to a plurality of antennas; identifying an access request from a client device to establish a virtual private network connection through a core network portion by means of the network interface device; determining application information from the client device by means of the net-work interface device; and comparing the application information to a network information of the core net-work portion to determine whether the application information matches the net-work information by means of the network interface device.
Abstract:
A method for scaling traffic engineering, TE, routing in a network, having a plurality of network elements (nodes) connected in a given layer to each other via links TE domain segments of a TE domain of said network are collapsed into a virtual TE nodes (VNs). Each VN having an allocated DE domain unique identifier and a detailed connectivity matrix, DCM, to provide a hierarchically virtualized network topology of the network.