Abstract: The invention relates to a telecommunication method in a base station of a mobile communication system, the mobile communication system comprising a plurality of base stations, a communication link being established between the base station and a user equipment, the method comprising the following steps performed by the base station: selecting one of the plurality of base stations as a target base station for a handover of the user equipment; transmitting a handover request to the target base station; receiving a handover request acknowledgement from the target base station, the handover request acknowledgment being indicative of at least one physical resource of the target base station; and transmitting a handover command to the user equipment via the communication link using the at least one physical resource. The handover command being descriptive of information required for accessing the target base station.

Abstract: The invention relates to a method (MET1) for selecting a transmission mode at a mobile station (MS) for a transmission of radio frequency signals (RFS) from the mobile station (MS) using a radio access technology. The method (MET1) contains the steps of selecting (M1/5) at the mobile station (MS) one of two or more transmission modes of the radio access technology for the transmission, and transmitting (M1/17) from the mobile station (MS) the radio frequency signals (RFS) with the selected one of the two or more transmission modes. The invention further relates to a mobile station (MS), to a network node (NN), and to a communication network (RCS).

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: The invention relates to a method for coordinating at least one first transmission from a multipoint transmitter or to a multipoint receiver and at least one second transmission from a single-point transmitter to a single-point receiver in a radio communication system. The method comprises the step of reserving at least one first radio resource (SI-F1 to S3-F1, S9-F1, SI 0-F1, SI-F2, SI-F1 b-BW2 to SI 0-F1 b-BW2, SI-F2b-BW2) for the at least one first transmission for at least two serving areas of the radio communication system and further reserving at least one second radio resource (S4-F1 to S8-F1, SI-F1 b-BW1 to SI 0-F1 b-BW1, SI-F2b-BW1, SI-F1 b-BW3 to SI 0-F1 b-BW3, SI-F2b-BW3) for the at least one second transmission for the at least two serving areas).

Abstract: Embodiments of the present invention include a system for transmitting a precoding codebook over an air interface. The system includes a first station configured to signal a set of indicators via at least one antenna to a second station from which the precoding codebook is derived at the second station based on the signaled set of indicators. The set of indicators includes less information than the precoding codebook.

Abstract: The invention relates to a method (MET1) for transmitting data in a communication system. The communication system comprises a first network node (BS1).

Abstract: The invention relates to a method for providing channel state information, CSI, about a radio channel (4) established between a first network element (2) and a second network element (3), the method comprising: providing an estimate (hn) of a channel coefficient (hn,a) of the radio channel (4) based on at least one signal, in particular a pilot signal (7), transmitted over the radio channel (4) from the first network element (2) to the second network element (3), making a prediction (I) of the channel coefficient (hn,a) of the radio channel (4) based on previous estimates (hn,k), and feeding back information about an error (en) between the prediction (I) and the estimate (hn) of the channel coefficient (hn,a) from the second network element (3) to the first network element (2). The invention also relates to network elements (2, 3) for implementing the method, as well as to a wireless communication network (1) comprising the same.

Abstract: When building sets of mobile stations in a radio communication network, reference signals are transmitted from a base station to at least two mobile stations to determine channel properties of a downlink channel between the base station and the at least two mobile stations. First and second feedback information are determined at the at least two mobile stations respectively, each feedback information comprising a first component indicating a channel quality. The first and the second feedback information are transmitted from the first and second mobile stations to the base station. A mobile station set is built according to the first and the second feedback information at the base station, wherein the channel quality is a parameter of a downlink beam with a largest received carrier power of at least three downlink beams of said downlink channel.

Abstract: The present invention refers to methods and apparatus for simultaneous transmission and reception of a data sequence (d) and channel information (CI) for link adaptation. In order to provide a method, a transmitter element (34), and a receiver element (38) that consume less transmission resources and improve the overall spectral efficiency of the network, a method and a transmitter element (34) for simultaneous transmission of a data sequence (d) and channel information (CI) for link adaptation over a radio channel (29) of a wireless network (11) is suggested, the method A comprising encoding said data sequence to a codeword (c) using a channel encoder (19) and transmitting (21) the codeword (c) over the radio channel (29), wherein the method further comprises including the channel information (CI) into the codeword (c) using said channel encoder (19), the codeword (c) comprising both the data sequence (d) and the channel information (CI).

Abstract: The present invention refers to a method and a transmitter element (35) for transmitting channel information (CI) for link adaptation of a radio channel (33) in a wireless network (11). In order to allow for reliable and efficient transfer of the channel information (CI) and to adapt the detection probability to the importance of the CI as well as to the channel stability, it is suggested that the method comprises encoding (19) the channel information (CI) using multi-level coding, said multi-level coding (19) comprising combining multiple bit sequences (c1, c2, . . . , cn, d), each bit sequence (c1, c2, . . . , cn, d) corresponding to a coding level (1, . . . , n) of said multilevel coding (19) and assigning (37) one of said coding levels (1, . . . , n) to at least a part (ci1, ci2) of the channel information (CI) such that at least a part (ci1, ci2) of the channel information (CI) corresponds to the bit sequence (c1, c2, . . . , cn) of that coding level (1, . . . , n).

Abstract: An apparatus and method for feeding back channel state information is disclosed. The method is for providing channel state information for a wireless communications channel provided between a first network node having at least one transmission antenna and a second network node having at least one reception antenna. The method comprises the steps of: determining characteristics of each tap resolvable in the time domain of at least one sub-channel within said channel from signals received by said at least one reception antenna over said channel from said at least one transmission antenna; arranging said characteristics into at least one vector; quantising said at least one vector by selecting one of a plurality of codebook vectors at a first level of a hierarchical codebook of vectors; and providing, to said first network node, an indication of an index to said one of a plurality of codebook vectors.

Abstract: The present invention relates to a method for determining the appropriate combination of at least two MIMO transmission techniques for a radio link in between a transmitter (10) and a receiver (20). The MIMO transmission techniques use at least two antennas (12, 14, 16, 18) with at least two polarizations. According to the invention the appropriate combination is the combination of beamforming and at least one of polarization time coding, closed loop coherent combination of polarization beams and polarization multiplexing. The appropriate combination is chosen dependent on at least one of radio conditions of the radio link (20) and relative velocity in between the transmitter (10) and the receiver (30). The invention further relates to a method for receiving a transmission of a radio link (20) in between a transmitter (10) and a receiver (30). The invention also relates to a base station comprising a transmitter, a mobile terminal comprising a receiver and a communication network.

Abstract: Embodiments of the present invention include a system for transmitting a precoding codebook over an air interface. The system includes a first station configured to signal a set of indicators via at least one antenna to a second station from which the precoding codebook is derived at the second station based on the signaled set of indicators. The set of indicators includes less information than the precoding codebook.

Abstract: Embodiments of the present invention include a system for transmitting a precoding codebook over an air interface. The system includes a first station configured to signal a set of indicators via at least one antenna to a second station from which the precoding codebook is derived at the second station based on the signaled set of indicators. The set of indicators includes less information than the precoding codebook.

Abstract: The present invention relates to a method for scheduling users in a mobile or wireless radio communication system comprising a base station with a multiple antenna system and at least two users, said base station communicating with users using precoding weights at said multiple antenna system, an indication on precoding weights to be used for communication with a first user being sent by said first user on a feedback channel to said base station.

Abstract: A base station (BS) for a SDMA-capable cell (C) of a radio communications system (1), adapted for: receiving precoding vector information (PMI) indicating a primary precoding vector (wPMI) in an ordered set of precoding vectors (w), receiving channel quality information (CQI) indicating a channel quality when using the primary precoding vector (wPMl) for scheduling a first user equipment (UE1), receiving channel quality degradation information (delta-CQI1 to delta-CQI4) indicating a degradation of a channel quality when scheduling a second user equipment (UE2) on the same time and frequency resources using a secondary precoding vector (wFCI) from a pre-defined ordered set of secondary precoding vectors selected in dependence of the primary precoding vector (wPMI), the base station (BS) being further adapted for: correlating the channel quality degradation information (delta-CQI1 to delta-CQI4) with corresponding secondary precoding vectors (wFCI) of the selected ordered set based on an order of reception of t

Abstract: A method for allocation of parameters for radio transmission in a wireless communication network using channel feedback compression is provided. At least one channel impulse response in the time domain for at least one connection (CH13-CH24) between an antenna (A1, A2) of a transmitter (BS) and an antenna of a receiver (MS) is determined. Only the at least one complex coefficient related to one or more time intervals of the at least one channel impulse response with a power higher than a predefined threshold is fed back. Parameters for radio transmission are allocated to the at least one connection (CH13-CH24) based on the at least one channel impulse response which is fed back. Network elements and a wireless communication network associated with the method are also provided.

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: 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.