Abstract: Known network management systems for managing traffic signals in a network store node/link parameter signals and traffic parameter signals and calculate solutions defining intermediate nodes/links situated between sources and destinations for transporting said traffic signals from said sources to said destinations via said intermediate nodes/links and calculate route information per solution. By storing node/link parameter signals and traffic parameter signals for several situations (like several predictions in the future) and calculating solutions for each situation and then selecting a solution per situation, the network management system will manage the network more advantageously, especially when solutions are compared with each other, and when a solution is selected per situation in dependence of comparison results (comprising similarities/differences between solutions of different situations).

Abstract: Known network management systems for managing traffic signals in a network store node/link parameter signals and traffic parameter signals and calculate solutions defining intermediate nodes/links situated between sources and destinations for transporting said traffic signals from said sources to said destinations via said intermediate nodes/links and calculate route information per solution. By storing node/link parameter signals and traffic parameter signals for several situations (like several predictions in the future) and calculating solutions for each situation and then selecting a solution per situation, the network management system will manage the network more advantageously, especially when solutions are compared with each other, and when a solution is selected per situation in dependence of comparison results (comprising similarities/differences between solutions of different situations).

Abstract: Known network management systems for managing traffic signals in a network store node/link parameter signals and traffic parameter signals and calculate solutions defining intermediate nodes/links situated between sources and destinations for transporting said traffic signals from said sources to said destinations via said intermediate nodes/links and calculate route information per solution. By storing node/link parameter signals and traffic parameter signals for several situations (like several predictions in the future) and calculating solutions for each situation and then selecting a solution per situation, the network management system will manage the network more advantageously, especially when solutions are compared with each other, and when a solution is selected per situation in dependence of comparison results (comprising similarities/differences between solutions of different situations).

Abstract: Provided is a management-system for use in a network environment including a first and second IP networks and a transport network which connects the first and second IP networks. The management system includes: a converter for optimizing a path in an IP-domain via a first algorithm and for converting IP-traffic-signals into transport-traffic-signals; and an optimiser which optimizes a topology that overlays the transport network by optimizing channels in the transport-network according to at least one second algorithm. The first algorithm is an IP multi protocol label switching routing optimization algorithm. The second algorithm is an algorithm based on a plurality of constraints and objectives such as a flow conservation constraint, logical link capacity constraint, optical router port constraint, wavelength cost objective, optical router port occupation objective, advertised link number objective, spare capacity objective, wavelength re-use benefit objective and optical service level agreement constraint.

Abstract: An access node (101) according to the invention is able to multicast a plurality of video channels to subscribers, and to cache N of these video channels. To select the N video channels for caching, the access node (101) determines for each video channel a weighted sum of the zapping rate rk to channel k and the channel popularity ?k. The N video channels that have the highest values for this weighted sum are cached by the access node (101).

Abstract: Known network management systems for managing traffic signals in a network store node/link parameter signals and traffic parameter signals and calculate solutions defining intermediate nodes/links situated between sources and destinations for transporting said traffic signals from said sources to said destinations via said intermediate nodes/links and calculate route information per solution. By storing node/link parameter signals and traffic parameter signals for several situations (like several predictions in the future) and calculating solutions for each situation and then selecting a solution per situation, the network management system will manage the network more advantageously, especially when solutions are compared with each other, and when a solution is selected per situation in dependence of comparison results (comprising similarities/differences between solutions of different situations).

Abstract: Network management systems for managing networks comprising nodes adapt their information parameters, via a one-step-replacement of old information parameters by new information parameters. These network management systems do not keep any transition-overview and must accept the new situation. By introducing a more-than-one-step-replacement via intermediate states, a transition-overview is kept, with said intermediate states allowing so-called make-before-break transitions. Preferably the adaptions are made in an optimised way, by defining constants and variables, and processing at least one objective and constraints, for example all being a function of routing parameters and/or of capacity parameters and/or of intermediate states. Networks comprising such network management systems as well as methods for managing such networks and comprising a step of adapting information parameters via intermediate states are more efficient and reliable.

Abstract: Network-systems comprising IP-networks with nodes (label switched routers) and edge-nodes (those routers coupled to a transport-network) and a transport-network (optical network) comprising channel-switches (optical cross connects) and a management-system for managing networks in an overlay environment (where the topology of the transport.network is not known to the management-system) deal with traffic non-optimally. By providing said management-system with a converter for converting IP-traffic-signals into transport-traffic-signals thereby assuming that both IP-networks are coupled via a star-network with said transport-network corresponding to a star of said star-network, and with an optimiser for in response to said converting optimising a use of channels in said transport-network according to an algorithm, network-systems can handle traffic more optimally. Said algorithm is defined by at least several constraints and several objectives.