Abstract: The invention relates to an iterative method for accessing a cellular communications network by a transceiver equipment, said transceiver equipment transmitting at least one PRACH preamble with a Timing Advance Offset (TAO) comprising t0, . . . , tk-1, tk, . . . , tn over a Random Access Channel to a base station serving a maximum cell range C, said PRACH preamble being a long sequence PRACH preamble supporting a cell range of r kilometres which is less than the maximum cell range C, wherein the method includes: a. transmitting the PRACH preamble with an initial starting TAO t0 calculated by the transceiver equipment depending on the maximum cell range C, and b1. determining a valid Random Access Response being received within a predetermined waiting interval, or b2.

Abstract: The invention relates to a method for handover of a transceiver equipment, in particular UE and/or on-board equipment (OBE), from a serving cell to a target cell in a cellular communications network, said serving cell belonging to a first base station and said target cell belonging to a second base station, and said target cell being selected from a group of neighbor cells being better than the serving cell by an offset, wherein the method comprises: I. transmitting a measurement report to the first base station, said measurement report comprising information on a neighbor cell selected from the group of neighbor cells, based on i. a distance criterion, and optionally ii. a trajectory criterion, II. receiving a handover command from the first base station, said handover command comprising instruction for handover to the selected neighbor cell becoming the target cell, and III. completing handover with the second base station.

Abstract: The invention relates to a device (10) for a cellular communications network (1000), wherein said device (10) includes at least a processor (12), a memory (14) and a transceiver (16) and is configurable to: determine (300) a parameter (P) which characterizes a relative velocity (v_rel) of said device (10) with respect to a base station (110) of said cellular communications network (1000), and to modify (302) a timing of at least one uplink transmission (ul) from said device (10) to said base station (110) depending on said parameter (P).

Abstract: Systems, methods, apparatuses, and computer program products for handover (HO) in long term evolution (LTE) air-to-ground (A2G) networks are provided. One method may include determining, by a terminal associated with an air-to-ground network, a distance from the terminal to at least one cell of the air-to-ground network. When the distance is less than a maximum distance limit, the method may comprise including at least one of an identity of the at least one cell, a signal strength of the at least one cell, or the distance, in a measurement report that is transmitted to the network.

Abstract: The invention relates to a device (10) for a cellular communications network (1000), wherein said device (10) includes at least a processor (12), a memory (14) and a transceiver (16) and is configurable to: determine (300) a parameter (P) which characterizes a relative velocity (v_rel) of said device (10) with respect to a base station (110) of said cellular communications network (1000), and to modify (302) a timing of at least one uplink transmission (ul) from said device (10) to said base station (110) depending on said parameter (P).

Abstract: Systems, methods, apparatuses, and computer program products for handover (HO) in long term evolution (LTE) air-to-ground (A2G) networks are provided. One method may include determining, by a terminal associated with an air-to-ground network, a distance from the terminal to at least one cell of the air-to-ground network. When the distance is less than a maximum distance limit, the method may comprise including at least one of an identity of the at least one cell, a signal strength of the at least one cell, or the distance, in a measurement report that is transmitted to the network.

Abstract: A method of non-destructively evaluating a thickness of a coating layer including a coating material on a turbine engine component includes placing first and second probes on an outer surface of the coating layer. The first and second probes are separated by a first distance. The first and second probes are configured to generate an electrical current in the coating layer. The method further includes placing third and fourth probes on the outer surface of the coating layer in a location that is between the first and second probes. The third and fourth probes are separated by a second distance that is less than the first distance. Still further, the method includes generating an electrical current in the coating layer using the first and second probes, measuring the electrical voltage using the third and fourth probes, and calculating the thickness of the coating layer based on the measured electrical voltage.

Abstract: Embodiments provide an apparatus, onboard equipment, a method, and a computer program for a remote radio head. The apparatus (10) for a remote radio head (100) comprises a switch (12) operable to substantially switch the transmit signal between the two or more transmit antennas (20).

Abstract: The present invention relates to a method for multi-antenna signal processing at an antenna element arrangement belonging to a transceiver of a radio communication network, the antenna element arrangement comprising antenna elements (211, 221, 231, 241) in horizontal and in vertical direction, wherein complex antenna weights are applied to said antenna elements.

Abstract: A method for assigning precoding vectors in a mobile cellular network as well as a base station. The base station provides a code book comprising indexed precoding vectors to mobile stations associated with the base station via a downlink channel. A mobile station selects indices of preferred precoding vectors from the code book and reports the indices to the base station via an uplink channel. The mobile selects indices of preferred companion precoding vectors from the code book that shall preferably be used by the base station for other mobile stations served by the base station on the same time/frequency resource, and reports the indices associated with the preferred companion precoding vectors to the base station via the uplink channel. For each mobile station, the base station determines a precoding vector based on the reported indices of the preferred precoding vectors and the reported indices of the preferred companion precoding vectors.

Abstract: The invention provides a method for communicating in a wireless communication network (206), the wireless communication network comprising a plurality of base stations (102; 104) and at least one mobile communication unit (100), the mobile communication unit comprising a transceiver component (300), a first Doppler compensation component (108), and a measurement component (110), wherein the first Doppler compensation component is adapted to compensate the Doppler shift of signals (1; 2; 7; 11; 12; 13) being exchanged between a base station of the plurality of base stations and the transceiver component. A handover procedure between two base stations is possible for fast moving user equipments.

Abstract: A method for performing communications in a wireless communication network includes receiving mobility information about at least one moving mobile station in a mobility server of the wireless communications network, using the mobility information from the mobility server for calculating antenna weights to be applied to antenna elements of an antenna array for steering a beam generated by the antenna array to the moving mobile station preferably using space-division multiple access, SDMA. Embodiments also relate to a base station, to a mobile station, and to a wireless communication network.

Abstract: Embodiments provide an apparatus, onboard equipment, a method, and a computer program for a remote radio head. The apparatus (10) for a remote radio head (100) comprises a switch (12) operable to substantially switch the transmit signal between the two or more transmit antennas (20).

Abstract: A method of non-destructively evaluating a thickness of a coating layer on a turbine engine component includes directing an acoustic wave into the turbine engine component, the acoustic wave including a frequency and a wavelength, receiving a return time-domain signal reflected from the turbine engine component, and transforming the time-domain signal into a frequency-domain signal. The method further includes subtracting a baseline signal from the frequency-domain signal and determining a local minimum frequency of the baseline-subtracted frequency-domain signal. Still further, the method includes calculating the thickness of the coating layer based on the determined local minimum frequency. Additional evaluation methods including ones based on resistivity, terahertz, and microwave are further disclosed.

Abstract: The disclosure relates to a ground-based wireless cellular communication system providing in-flight broadband mobile communication services. The system includes at least one ground-based base station adapted for generating at least one cell defining a solid angle of space surrounding the base station. The ground-based base station includes an antenna array using two-dimensional-beamforming for generating at least one beam for serving at least one airplane in the space covered by the at least one cell using spatial-division multiple access (SDMA). The disclosure also relates to an airplane equipment for providing in-flight broadband mobile communication services.

Abstract: Embodiments relate to a concept for determining an estimate (17) of a frequency offset between a carrier frequency of a received signal (12) and a carrier frequency of a transmitted signal, comprising determining, based on the received signal (12), an estimate (13) of the carrier frequency of the received signal (12), generating a reference signal (15) having a reference frequency corresponding, within a predefined tolerance range, to the carrier frequency of the transmitted signal, and estimating the frequency offset (17) based on the estimated carrier frequency (13) of the received signal (12) and the reference frequency of the reference signal (15).

Abstract: The invention provides a method for communicating in a wireless communication network (206), the wireless communication network comprising a plurality of base stations (102; 104) and at least one mobile communication unit (100), the mobile communication unit comprising a transceiver component (300), a first Doppler compensation component (108), and a measurement component (110), wherein the first Doppler compensation component is adapted to compensate the Doppler shift of signals (1; 2; 7; 11; 12; 13) being exchanged between a base station of the plurality of base stations and the transceiver component. A handover procedure between two base stations is possible for fast moving user equipments.

Abstract: The invention concerns a method for interleaving a dedicated set of bits that is divided in an appropriate number of blocks using for each block an interleaver matrix with a predefined first dimension for interleaving the bits within each block, whereby said appropriate number of blocks is estimated in such a way that a value of a second dimension of the interleaver matrix that is needed to interleave the bits within each block lies within a dedicated range, a base station (BS1-BS8), a user terminal (T1-T4) and a communication network (CN) therefor.

Abstract: Method for performing communications in a wireless communication network (1), comprising: receiving mobility information about at least one moving mobile station (5) in a mobility server (8) of the wireless communications network (1); using the mobility information from the mobility server (8) for calculating antenna weights to be applied to antenna elements (3i) of an antenna array (3) for steering a beam (3a) generated by the antenna array (3) to the moving mobile station (5) preferably using space-division multiple access, SDMA. The invention also relates to a base station (2), to a mobile station (5), and to a wireless communication network (1).

Abstract: The invention relates to a mobile communications device (10), particularly mobile terminal of a cellular communications network, comprising a data transmission interface (14) capable of wireless data transmission, wherein said communications device (10) is configured to output directional information indicating in which spatial direction to move the communications device (10) in order to improve a predetermined quality measure of a data transmission.