Abstract: A group of two or more vehicles (21, 22, 23), each vehicle (21, 22, 23) comprising a communication unit (210, 220, 230) coupled with a navigation unit (211, 221, 231), wherein one vehicle of the group is classified as master vehicle (21) leading the group and the remaining vehicles of the group are classified as slave vehicles (22, 23) following the master vehicle (21), travel together. A central remote navigation server (30) provides the vehicles (21, 22, 23) with a navigation service, wherein the navigation server (30) calculates for each of the slave vehicles (22, 23) route instructions (506, 606) such that the slave vehicles (22, 23) are instructed to follow the master vehicle (21). The route instructions (506, 606) are transmitted to the slave vehicles (22, 23) via a communication network (10).

Abstract: This invention relates to a method for forwarding telephone messages to a resident telephone device 10 associated to a telephone number and a resident telephone device. The method is comprising the steps of detecting 12 whether a hand held cellular telephone 8 associated to said resident telephone device 10 is located in a neighboring area of said resident telephone device 10, and activating a telephone message forwarding routine for redirecting incoming telephone messages 30 destined to said cellular telephones to said resident telephone device 10 using said telephone number. The method is used for an automatic handover from a mobile telephone handset to another telecommunication set, preferably a resident mobile telephone device in a car 5 to avoid the use of a hand held cellular phone 8 by a driver 1 of the car 5.

Abstract: The invention concerns a method of establishing a communication connection between terminals (21 to 27) as well as a server (3) for supporting such establishment. Geographical positions of subscribers of a user group are determined. The server (3) correlates said geographical positions with road network data (31) and dynamically assigns road addresses to said subscribers, wherein the road addresses reflect the position of subscribers relative to the road network. When receiving a call request, the server routes the call to one or more terminals (21 to 27) of subscribers of the user group based on said call request and said assignment of road addresses.

Abstract: The invention relates to an optical switch fabric comprising at least one micro mirror array with tilting micro mirrors for individually switching optical paths for optical signals between input and output ports, especially fibers or waveguides gathered in at least one fiber arrays, comprising a beam splitter and a detector array, wherein the beam splitter is adjusted to partly reflect the optical signals reflecting from the mirrors of said at least one micro mirror array to said detector array and micro mirror control means, that are realised such, that a control signal is generated out of a feedback signal of said a detector array to correct the angular positions of the micro mirror and a method therefore.

Abstract: An optical wavelength monitor provided with an optical coupler for coupling at least a part of the optical signals transmitted in an optical waveguide, which signals are transmitted by means of different carrier wavelengths divided into channels. The coupler is connected via an optical amplifier to a wavelength demultiplexer which selects at least one carrier wavelength of these optical signals and forwards each of these selected carrier wavelengths to a specific output. Optical detectors are connected to these outputs, which detectors each convert an optical signal, detected in a specific channel, into an electrical signal. The optical wavelength monitor is wherein an oscillator is provided which is suitable for modulating the optical signals, supplied to the optical amplifier, with a frequency.

Abstract: In accordance with the invention, a plurality of glass waveguides (GWL1 . . . GWL4) are arranged in a first plane. In an overlying plane there is arranged at least one polymer waveguide (PWLA) which forms an acute angle with the glass waveguides. Vertical coupling regions are formed where the polymer waveguide intersects the underlying glass waveguides. The coupling properties can be selectively influenced with the aid of heating electrodes (EA1 . . . EA4; EB1 . . . EB4). To switch over light from one glass waveguide into another, the temperature of the vertical coupling regions is set such that light is coupled up from the one glass waveguide into the polymer waveguide, is guided therein, and is coupled down into the desired glass waveguide in another coupling region.