Abstract: In one aspect, a method for estimating the bandwidth requirements for a transmission between an input node and an output node of a network with access controls is provided. According to the method, with respect to a time period, the sum of the value of the average bandwidth of the traffic that has been transmitted between the nodes during the time period and the weighted value of the accumulated bandwidth of the declined reservation requests is calculated. An efficient, approximate determination of the traffic matrix of the network and thus an optimal new definition of the limits for the access controls is permitted. This provides particular advantages in terms of efficiency and resources for applications in networks with a dynamic adaptation of the access controls to modified traffic situations.

Abstract: In one aspect method and device for tracking network parameters of a communications network, which is formed by links, with access controls for the purpose of limiting the traffic load are provided. The traffic matrix of the network is regularly determined and probabilities of the blocking of traffic are determined based on the traffic matrix. If the blocking probabilities exceed a criterion, typically a maximum blocking probability, the access controls are oppositely controlled in an automatic manner by resetting the limits for the access controls. This resetting can precede a resetting of link weights for optimizing the distribution of traffic in the network. Automatic continuous adaptation of network parameters for optimizing the probability of authorization is enabled for the traffic flows to be transmitted.

Abstract: In one aspect, a method for restoration of states maintained in a signalization component of a communication network, after a failure or disruption is provided. An additional signalization component of the communication network is distributed to at least one state in order to protect the states and is stored in said component in the form of a copy. After a failure or disruption of the signalization component, the state stored in the additional signalization components is called up by the signalization component for restoration.

Abstract: In one aspect, the probability of non-admittance of traffic is determined and weighed according to the admittance threshold value. Also, the probability of non-compliance of at least one service quality characteristic is determined and weighed during the transfer of traffic according to the admittance threshold value. The optimum admittance threshold value for traffic is determined according to the weighted probabilities.

Abstract: A method and a device for the production and distribution of messages directed at a multitude of recipients in a communications network, wherein a message to be transmitted is characterized by at least one semantic feature that defines the content of the meaning of the message, and a number of formal features that define the form of the message, and wherein a multitude of versions of this message are produced for the message to be transmitted, wherein each version of the message differs to a certain degree from other versions of the message with respect to the formal features, and wherein each version of the message is sent to at least one recipient.

Abstract: There is described a method and a configuration system for the automatic readjustment of limits for access controls used to restrict the traffic in a communication network formed by links, said communication network comprising control bodies for performing the access controls. The readjustment of limits for access controls is triggered by an event. A traffic matrix of the network is recorded in the configuration system of the communication network, and a recalculation of link weights is carried out by the configuration system by means of a traffic matrix. New limits are determined limits are respectively transmitted to associated control bodies for performing the access restriction and are activated for access controls. The method enables the limits for the access controls to be automatically monitored.

Abstract: A data connection switching unit is provided for use in an optical communication network, as well as an optical communication method and an optical communication network, in which, via a number of interconnected network node devices of an optical transport network, data is transferred to a second transceiver via a first data connection via optical signals, wherein a data connection switching unit is connected between the first transceiver and one of the network node devices, which independently instigates the setting up of a second data connection between first and second transceivers by virtue of the fact that it sends a data connection setup signaling signal to the corresponding network node device in which information referring to the desired course of the second data connection is included.

Abstract: An overbooking according to the ratios of the measuring values of transferred aggregated traffic is determined according to the face values of aggregated transferred traffic. The ratios of measuring values in relation to face values are weighted according to the variable of either the measuring value or the face value such that with smaller measuring values and/or face values the ratios thereof have a slightly lower effect on the determination of overbooking than the ratios of greater measuring values and face values in relation to each other. Systematic access for the improved use of wave bands is provided. Representative situations, wherein a high charge of the wave band is predominant, are taken into account to a greater extent during the determination of the overbooking factor than by phases characterized by a small load.

Abstract: An optical communication network, an optical information transmission method and network node devices for use in an optical communication network, in which optical signals are exchanged via a first data link between a first network node device and a second network node device with interposition of a number of further interconnected network node devices, in which, after a disturbance on the first data link, a third network node device sends a signaling signal to a fourth network node device connected to the third network node device for setting up a second data link which acts at least partially as a standby for the first data link, which signaling signal contains a parameter (NRR, n) determined by the third network node device on the basis of which it is determined whether the fourth network node device is responsible for setting up the second data link or not.

Abstract: The invention relates to a method for providing resources for adapting the routing process in response to the failure of a network element in a packet-oriented network. Barring checks that use thresholds are provided to control the volume of traffic in the network. Data packets are barred if their routing would otherwise mean the crossing of a threshold. According to the invention, the thresholds are defined by taking into account failure topologies or possible malfunction scenarios, to ensure that a corresponding malfunction does not lead to an overload in the network. Said definition of the thresholds allows resources to be provided or reserved to all intents and purposes for intercepting malfunctions. The advantage of the invention is that quality criteria can be upheld and quality of service features guaranteed, even during the malfunctions.

Abstract: A method for operating a network node of a communication network is provided, the network node having a routing method. Before any configuration of the network node by a control device, a minimum waiting time of the network node for the calculation of routing paths is increased after a configuration change. Configuration data is then read into the network node, whereafter said minimum waiting time is reset to a lower value.

Abstract: A control entity for a communication network comprising a number of network elements is provided. For the purpose of configuring parameters of network elements in a communication network, the control entity features a user interface for the network operator or operator. This is designed such that changes to the parameters proposed by the control entity are proposed to the network operator and the network operator can choose between different response options to the proposed changes.

Abstract: The invention relates to the routing of data packets comprising a target address in a packet switching data network. According to the invention, a first and second transmission path are assigned respective traffic distribution weightings in a routing table for individual target addresses that is assigned to a network node, said weightings indicating the respective allocated traffic load per transmission path. The maximum traffic distribution weighting is assigned to the respective first transmission path and the minimum traffic distribution weighting is assigned to the second transmission path. During undisturbed operation, data packets are routed via the first transmission path and if said path is interrupted, the packets are routed via the second transmission path.

Abstract: The invention relates to the routing of data packets in a packet-switched network, e.g. in an autonomous system, having traffic distribution. According to the invention, the forwarding or the routing of data packets occurs via the access interface based on an item of information and via the output interface of the data packet based on an item of information. Both these items of information are, for example at the input interface, placed in front of the data packet in the form of information fields or labels. The invention enables, with a moderate expense and limited degree of complexity, a flexible and loop-free routing under the terms of a traffic distribution.

Abstract: In order improve maintenance of packet sequences in a connectionless network comprising several routers enabling the packets of a flow to be transmitted via several pathways, a packet arriving in a router is transmitted on a route in the same way as a packet which is already located in the router and belongs to the same flow or an incoming packet in the router, which arrives in the router within a time window and which is opened by a packet belonging to the same flow, is transmitted on the same route as the packet opening said window.

Abstract: According to said method, routing information or a list of routing information is inserted or modified in the packet header of data packets, in response to a malfunction of the packet network, in order to avoid defective nodes or links. The data packets with modified headers are routed using the inserted routing information to avoid the network node that is not available. The routing information inserted in the packet header can be determined via the packet network with the aid of topological information. The invention allows a rapid response to malfunctions. Packet losses and delays in data transmission can thus be avoided immediately after the determination of the malfunction by routers adjoining the malfunction area, whereas in conventional packet networks, a problem-free data transmission can only be restored after the convergence of the modified topological information in the packet network.

Abstract: The invention relates to the autonomous, adaptive control of a network element in a packet-oriented and connection-less communication network, and to the coupling of a plurality of network elements.

Abstract: The invention relates to a device for controlling data traffic (7) in TCP/IP data transmission networks. Said device comprises a transmitter (6) that transmits data to a second terminal node (3), a detection device (8) for detecting an overload situation of the device for controlling data traffic (7), and a signaling device (9) for generating signal messages that announce the overload situation to the first terminal node (2). The invention further relates to a method for controlling data traffic in TCP/IP data transmission networks.

Abstract: The present invention relates to an optical communications method, a network node device and a transmission/reception device for use in an optical communications network, and also to an optical communications network having at least a first and a second transmission/reception device which are respectively connected to one of a number of network node devices in an optical transport network via which data can be interchanged between the first and the second transmission/reception device using optical signals, and having a central registration device for centrally storing data relating to the registration of the first and second transmission/reception devices within the optical communications network, wherein at least some of the registration data associated with a transmission/reception device are managed by that network node device to which the respective transmission/reception device is connected.

Abstract: Provided are a transceiver for use in an optical communication network, an optical information transmission method, and an optical communication network in which optical signals are transferred via a first data connection from a first transceiver to a second transceiver via a number of interconnected network node devices, wherein in order to set up a second data connection between first and second transceivers, there is sent from the first transceiver to the network node device connected to the first transceiver a data connection setup signaling signal in which information referring to the desired course of the second data connection is included.