Abstract: The invention relates to a method for displaying a notification for a user in which first image data associated with the notification is displayed on a display unit in a normal display mode. The method also includes displaying second image data associated with the notification on the display unit in a safety display mode as soon as a predetermined fault condition is satisfied in the normal display mode. The predetermined fault condition being satisfied is checked by comparing a current display of the first image data by the display unit in the normal display mode, with respect to a presence of image faults, with a reference display of the first image data by the display unit in the normal display mode. The current display and the reference display are subdivided into regions and/or pixels for the comparison, said regions and/or pixels being associated with classes as background, foreground, image edge and/or irrelevant.

Abstract: The invention relates to a method for displaying a notification for a user in which first image data associated with the notification is displayed on a display unit in a normal display mode. The method also includes displaying second image data associated with the notification on the display unit in a safety display mode as soon as a predetermined fault condition is satisfied in the normal display mode. The predetermined fault condition being satisfied is checked by comparing a current display of the first image data by the display unit in the normal display mode, with respect to a presence of image faults, with a reference display of the first image data by the display unit in the normal display mode. The current display and the reference display are subdivided into regions and/or pixels for the comparison, said regions and/or pixels being associated with classes as background, foreground, image edge and/or irrelevant.

Abstract: The invention relates to, among other things, a method during which a network element (58, 60) of a data transmission network (50) is automatically integrated into a method for establishing a loop-free tree structure or is automatically removed from such a method. By taking preset criteria into account, it is ensured that no loops can arise in the data transmission network (50) when removing a network element from the method for establishing a loop free tree structure.

Abstract: A method for starting lasers in a network is provided. According to the method, a restart phase in automatic mode is initiated after the laser is disconnected. During the restart phase in automatic mode, which is accompanied by a delay time for the new laser connection, the automatic mode is switched to a different mode in which the new connection of the laser takes place faster than in automatic mode. This can be achieved by switching to manual mode as per ITU-T G.664. Furthermore, safety measures are defined before activating switching from the network management or a network element control so that safety is ensured during the fast, new connection of the laser.

Abstract: The invention relates to, among other things, a method during which a network element (58, 60) of a data transmission network (50) is automatically integrated into a method for establishing a loop-free tree structure or is automatically removed from such a method. By taking preset criteria into account, it is ensured that no loops can arise in the data transmission network (50) when removing a network element from the method for establishing a loop free tree structure.

Abstract: A method for starting lasers in a network is provided. According to the method, a restart phase in automatic mode is initiated after the laser is disconnected. During the restart phase in automatic mode, which is accompanied by a delay time for the new laser connection, the automatic mode is switched to a different mode in which the new connection of the laser takes place faster than in automatic mode. This can be achieved by switching to manual mode as per ITU-T G.664. Furthermore, safety measures are defined before activating switching from the network management or a network element control so that safety is ensured during the fast, new connection of the laser.

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: In order to set up a bidirectional connection path in an optical transmission system composed of a number of switched optical network nodes having a number of unidirectional terminating units, in which each unidirectional terminating unit of a network node is connected to a unidirectional terminating unit of a further network node via a unidirectional connection path section, an adaptation layer is provided via which at least two unidirectional terminating units of an optical network node which have opposite transmission directions are combined to form one bidirectional terminating unit and addressed together. As a result, the setting up of the bidirectional connection paths is improved in a particularly advantageous way in terms of the duration and the signaling complexity.

Abstract: The invention relates to a method for establishing a substitute path in a network with corresponding network nodes for path-switching between connection runs, whereby for the switching of path between two terminal nodes, a first network resource is used for the transmission and the signal transmission is interrupted in a connection run within said path. A substitute path is thus selected, in which the second resource to be selected must remain with a minimal resource loading on the switching of the network nodes. The establishment of the substitute path, corresponding to the second resource, is selected such that network nodes for the switching of retained connection runs between the original path and the substitute path must be minimally newly switched and new switching merely carried out for newly utilised connection runs.

Abstract: A clock and data regenerator for different data rates including a control loop which is controlled by a phase discriminator (PD) and two frequency discriminators. The first frequency discriminator enlarges the catchment range of the control loop. The second frequency discriminator determines the ratio of the bit rates of the clock signal and of the data signal. The second frequency discriminator sets the loop frequency divider appropriately, and supplies a control voltage for setting the oscillator until the first frequency discriminator can carry out this function.

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: The clock and data regenerator comprises a control loop which is controlled by a phase discriminator (PD) and two frequency discriminators (FD1, FD2). The first frequency discriminator (FD1) enlarges the catchment range of the control loop in a known manner. The second frequency discriminator (FD2) determines the ratio of the bit rates of the clock signal (TS) which it produces itself and of the data signal (DSF). It sets the loop frequency divider (6) appropriately, and supplies a control voltage for setting the oscillator (5) until the first frequency discriminator (FD1) can carry out this function.

Abstract: In order to set up a bidirectional connection path in an optical transmission system composed of a number of switched optical network nodes having a number of unidirectional terminating units, in which each unidirectional terminating unit of a network node is connected to a unidirectional terminating unit of a further network node via a unidirectional connection path section, an adaptation layer is provided via which at least two unidirectional terminating units of an optical network node which have opposite transmission directions are combined to form one bidirectional terminating unit and addressed together. As a result, the setting up of the bidirectional connection paths is improved in a particularly advantageous way in terms of the duration and the signaling complexity.

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: A method of setting up a connection in a WDM transmission system with a number of switchable optical network nodes, of which at least one has a wavelength converter, wherein for setting up a connection from a first optical network node over at least one connection path section to an Nth optical network node, a first connection vector is formed for identifying WDM transmission channels available on the following connection path section and is transmitted over the at least one optical WDM transmission system and, in the at least one optical network node having a wavelength converter, a further connection vector is formed for identifying available WDM transmission channels on the following connection path section and is transmitted over the at least one optical WDM transmission system.

Abstract: For transmitting received signals from an antenna (A) to a base station (BS) of a radio system, optical signals, which are transmitted to the base station (BS) via a light guide (L), are generated in an antenna unit (AE) connected to the antenna (A). An optical carrier is generated in the base station (BS) and is fed to the antenna unit (AE). There, the optical carrier is modulated, using an electro-optical modulator (EO), in a way corresponding to the received signals coming from the antenna (A) and is transmitted to the base station (BS) via a light guide (L). The present invention dispenses with the need for dedicated lasers in the antenna units (AE).