Abstract: An optical data transmission system having a hub, an optical router, and a plurality of optically pumped sources at a curb location, and a plurality of optical network units (ONUs). The ONUs generate and transmit respective data modulated pumping light to the curb location where it is received by the optically pumped sources, which convert it into the wavelength channels having predefined wavelength ranges assigned to respective ONUs. The optical router routes the wavelength channels for transmission to the hub.

Abstract: A method and system for ensuring confidentiality of signal transmission in a point-to-multipoint data transmission network like Ethernet passive optical network, including at least one hub, at least one transmission medium and at least one station connected to the hub via the transmission medium. When an upstream signal is transmitted from a first station, the upstream signal is reflected by at least one disturbing reflector for producing a disturbing reflection. The disturbing reflection combines with a second reflection of the upstream signal and renders the second reflection undecodable by a second station.

Abstract: A method and communication system, are discussed, including a plurality of communication nodes connected by a data link, and a communication controller configured to allocate link-level addresses to the communication nodes. The communication nodes may be identified for communications over the data link. The communication controller is further configured to change from time to time the link-level addresses allocated to each communication node and to transmit the newly allocated link-level address to a respective communication node in an encrypted form.

Abstract: A method and system for ensuring confidentiality of signal transmission in a point-to-multipoint data transmission network like Ethernet passive optical network, including at least one hub, at least one transmission medium and at least one station connected to the hub via the transmission medium. When an upstream signal is transmitted from a first station, the upstream signal is reflected by at least one disturbing reflector for producing a disturbing reflection. The disturbing reflection combines with a second reflection of the upstream signal and renders the second reflection undecodable by a second station.

Abstract: A method and system for ensuring confidentiality of signal transmission in a point-to-multi point data transmission network like Ether net passive optical network, including at least one hub, at least one transmission medium and at least one station connected to the hub via the transmission medium. When an upstream signal is transmitted from a first station, the upstream signal is reflected by at least one disturbing reflector for producing a disturbing reflection. The disturbing reflection combines with a second reflection of the upstream signal and renders the second reflection undependable by a second station.

Abstract: A method for analyzing services offered via a communication system is disclosed. The method includes steps of analyzing demand for offered services and analyzing at least one quality aspect of at least one service on offer via a communication system. A net benefit analysis is then performed based upon the results of the analyzing steps. Implications of at least one design aspect of the offered services to aspects associated with merits of services offered via the communication system are then analyzed. An analyzer configured to analyze services offered via a communication system is also described.

Abstract: A service design planning tool for planning of services offered for users via a communication system. The planning tool allows for the performance of an interaction analyzer function and an optimizer function. The interaction analyzer function allows for analysis of the interaction between technical and economical aspects of a design of services that are offered for users via a communication system. The optimizer function allows for optimization of the design of the services in accordance with a predefined objective and based on data from the interaction analyzer.

Abstract: A method and analyzer analyzes services offered via a communication system A net benefit is determined for a first service based on selected features of the first service. Differences between the selected features of the first service and a second service are then determined. A combined net benefit is then determined based on the net benefit of the first service and the differences between the selected features of the first and second services.

Abstract: The invention relates to a method for optical coding of a broadband signal, to an optical coder. In order to enable an efficient increase in the number of codes for an OCDMA system, the method comprises coding the signal by frequency-hopping and coding the frequency-hopping coded signal temporally or coding the signal temporally and coding the temporally coded signal by frequency-hopping. The proposed optical coder 10 comprises corresponding means 20, 30. The invention relates equally to a network architecture for optical coding of broadband signals originating from a plurality of users 50 or for optical decoding of an encoded broadband signal destined for a plurality of users 50 with distributed means for frequency-hopping and temporal coding.

Abstract: A method and system for ensuring confidentiality of signal transmission in a point-to-multipoint data transmission network like Ethernet passive optical network, including at least one hub, at least one transmission medium and at least one station connected to the hub via the transmission medium. When an upstream signal is transmitted from a first station, the upstream signal is reflected by at least one disturbing reflector for producing a disturbing reflection. The disturbing reflection combines with a second reflection of the upstream signal and renders the second reflection undecodable by a second station.

Abstract: An optical data transmission system (200) comprises a hub (202), an optical router (210) and a plurality of optically pumped sources (212) at a kerb location (208), and a plurality of ONUs (204). The ONUs generate and transmit respective data modulated pumping light to the kerb location where it is received by the optically pumped sources which convert it into the wavelength channels having predefined wavelength ranges assigned to respective ONUs. The optical router routes the wavelength channels for transmission to the hub.

Abstract: The invention relates to an optical coder and a method for coding a signal in an optical fibre network, which signal is divided into bit periods, each bit period containing one or no short light pulse. In order to achieve reduced multiple access interference and at the same time an increased security, the each short light pulse is spread in time according to a predetermined code into a predetermined number of chips distributed over several bit periods and afterward, the chips are combined in a single signal again. The proposed optical coder comprises means (20-25) for such temporal spreading and means (21′-23′) for combining the spread chips again.