Abstract: A method for establishing a communication through multiple distinct communication paths deployed over different network operators includes collecting location information of network nodes of available distinct paths between a source node and destination node, comparing location information of the network nodes to identify possibly co-located network nodes, determining path segment lengths of consecutive path segments between the nodes of each path, estimating whether path segments of the paths intersect based on locations of the network nodes and the path segment lengths, selecting multiple paths that do not include intersecting path segments and/or co-located network nodes, and establishing communication between the source node and destination node over both selected paths.

Abstract: A system for localizing an object in an indoor environment. The system uses a plurality of wireless access points and at least one cooperative mobile network device. The cooperative mobile network device is connected to at least one of the wireless access points. The wireless access points and the cooperative mobile network device sense first and second signal propagation data of wireless signals transmitted via the wireless communication network. The cooperative mobile network device evaluates the second signal propagation data and determines its own position based on the data and the positions of the wireless access points. A position of an object is obtained based on the evaluated first and second signal propagation data, the positions of the wireless access points and the determined position of the cooperative mobile network device.

Abstract: A method for operating an unmanned aerial vehicle, which is flight-controlled by a flight control unit to follow a given trajectory, includes an optimization of the trajectory based on a simulation model of the unmanned aerial vehicle and a communication link to a ground station to form a trajectory along which a certain connection quality to the ground station can be maintained.

Abstract: Systems for wireless power transfer (WPT) include one or more WPT transmission devices and one or more WPT receiver devices to wirelessly receive power transmitted by the one or more WPT transmission devices. The WPT receiver devices are arranged at a fixed position relative to each of the WPT transmission devices. A WPT transmit controller of the systems is coupled to the one or more WPT transmission devices to control WPT transmission properties of the one or more WPT transmission devices in order to harmonize and adapt the transmit power level at the fixed position of the one or more WPT receiver devices.

Abstract: A method for operating an unmanned aerial vehicle, which is flight-controlled by a flight control unit to follow a given trajectory, includes an optimization of the trajectory based on a simulation model of the unmanned aerial vehicle and a communication link to a ground station to form a trajectory along which a certain connection quality to the ground station can be maintained.

Abstract: The invention relates to a protection device for removing signal interference in a passive optical network and to a corresponding passive optical network and to a method for removing signal interference in a passive optical network.

Abstract: A method defines shared risk link groups in optical transport systems, in which two optical links sharing at least one single point of failure are considered to be non-disjoint. For each optical link there is measured and recorded a polarization state characteristic and two links having the same characteristic are judged to be non-disjoint and to be in the same shared risk link group.

Abstract: The invention relates to a protection device for removing signal interference in a passive optical network, in which a central optical cable (1) is split into several branch lines (3) at a branching point (2), comprising: a plurality of first pickups (A1, A2, . . . , A4) and/or a second pickup (A0), wherein, in at least part of each of the branching cables (3), there is a first pickup to detect an optical signal flowing in the particular branch line (3) to the central cable (1), and/or wherein the second pickup (A0) is provided in the central cable (1) to detect an optical signal flowing in the central cable (1) away from the branching point (2); a plurality of switches (S1, S2, . . . , S4), wherein, in at least one part of each of the branching cables (3), there is a switch to switch off the particular branching cable (3); wherein the protection device includes a control device (C0; C1, C2, . . .