Abstract: A method for interference reduction in a radio communication system is disclosed. The method includes receiving from a mobile station indications of radiation beams that are transmitted by a first base station of the radio communication system and that fulfill or exceed a predefined quality criterion at the mobile station, when the mobile station is attached to the first base station and when the mobile station is located within a first overlapping coverage area of the first base station and of a second base station of the radio communication system, and determining at least one radio resource to be unused or to be transmitted with a limited transmission power by the first base station for at least one of the radiation beams based on the received indications for serving the mobile station or a further mobile station by the second base station with the at least one radio resource.

Abstract: A sounding method in a cellular wireless communication system, comprising at least one mobile station and at least two base stations. One base station is a serving base station for the mobile station and the at least one further base station is a neighboring base station. The serving base station generates a schedule for measurement signals and transmits said schedule to the mobile station and to the neighboring base station. The mobile station transmits measurement signals in accordance with the schedule to the serving base station and to the neighboring base station. Furthermore, the neighboring base station calculates a mean channel state for the uplink channel from the mobile station to itself and transmits the mean channel state to at least one further base station, so that said base station can be provided with channel estimations for uplink channels between the mobile station and all base stations.

Abstract: The invention concerns a method for beam coordination between a first base station (M1) and a second base station (P1), wherein interfering beams (B2-B4) transmitted from the first base station (M1) are determined based on measured reference signals, dependent on a ranking of interfering beams (B2-B4) which shall be restricted in use, a restriction of a use of radio resources in the first base station (M1) in at least one ranked interfering beam (B3) is performed, and user terminals (UE1, UE2) served by the second base station (P1) are scheduled on radio resources which are restricted in use in the first base station (M1) in said at least one ranked interfering beam (B3), a base station and a user terminal therefor.

Abstract: The invention concerns a method for downlink communication between a base station and a user terminal by means of a downlink superimposed radio signal comprising downlink data for the user terminal and for at least one further user terminal that are transmitted using the same radio resources, wherein the downlink data for the user terminal are transmitted with lower power than the downlink data for the at least one further user terminal, and control information is sent in downlink from the base station to the user terminal that enables the user terminal to decode the downlink data for the at least one further user terminal, a base station, a user terminal and a communication network therefor.

Abstract: The invention relates to a method for interference reduction in a radio communication system.

Abstract: The present invention relates to a method for reducing interference in the downlink direction of a cellular radio communication system comprising base stations communicating with terminals using a frame structure showing a time and frequency extension, said frame comprising a preamble portion and at least one data portion, said terminals being adapted to receive frames for which the receive power of said at least one data portion is varying in a predefined range relative to the receive preamble power of said preamble portion, According to the present invention, the method comprises the steps of: transmitting the part of said data portion destined to said terminal with a transmit power adapted to generate a first receive power (Plow) at said terminal within said range if said terminal belongs to a first group of terminals; transmitting the part of said data portion destined to said terminal with a transmit power adapted to generate a second receive power (Phigh) at said terminal within said range, said seco

Abstract: The present invention relates to a method for scheduling transmissions in a radio communication system comprising a plurality of base stations and a plurality of terminals, a base station being associated to a sector and transmitting/receiving data to/from terminals located in said sector. According to the present invention, the method comprises the steps of: —determining an area around each given sector, said area comprising a set of sectors, —allocating to said sectors in said area a scheduling priority chosen among at least two different scheduling priorities, —scheduling decisions in a sector having a lower scheduling priority than a sector belonging to said area depending on scheduling decisions made for said sector with higher scheduling priority, said scheduling decisions made in said sector with higher scheduling priority being reported by said base station associated to said sector with higher scheduling priority to said base station associated to said sector with lower scheduling priority.

Abstract: The invention concerns a method for beam coordination between a first base station (M1) and a second base station (P1), wherein interfering beams (B2-B4) transmitted from the first base station (M1) are determined based on measured reference signals, dependent on a ranking of interfering beams (B2-B4) which shall be restricted in use, a restriction of a use of radio resources in the first base station (M1) in at least one ranked interfering beam (B3) is performed, and user terminals (UE1, UE2) served by the second base station (P1) are scheduled on radio resources which are restricted in use in the first base station (M1) in said at least one ranked interfering beam (B3), a base station and a user terminal therefor.

Abstract: The invention relates to a mobile telecommunication device (100) for establishing a telecommunication connection in the radio frequency range with a base station (102; 104; 1100), the mobile telecommunication device comprising; at least a first (106) and a second antenna (108), an electromagnetic shield (110) located between the first and the second antenna, a logic component (1000), wherein the first and the second antenna are adapted to transmit and receive telecommunication signals of the same frequency band, and wherein the logic component selects whether the first or the second antenna is used for the telecommunication connection with the base station.

Abstract: The present invention refers to a method (41) for a deciding on whether to perform a potential load balancing operation (57) in a wireless network (11) having a first cell with second cells embedded therein. In order to improve the overall performance of the network (11) a method (41) for deciding on a potential load balancing operation (57) in a wireless network (11) comprising a first base station (15) having a first cell (13) and at least one second base (21) station having a second cell, the first cell (13) and the second cell (21) at least partially over lapping each other, is suggested.

Abstract: The invention relates to a method for mitigating interference on a physical downlink control channel (PDCCH) used by at least two cells (C1, C2), the method comprising: distributing a number of control channel elements of the Physical Downlink Control Channel (PDCCH) among the cells (C1, C2), and determining a set of cell identifiers (cell ID1, cell ID2) for the cells (C1, C2) based on a number of collisions of the control channel elements in a downlink sub-frame (SF) of the Physical Downlink Control Channel (PDCCH), a location of the control channel elements in the downlink sub-frame (SF) being dependent on the cell identifiers (cell ID1, cell ID2). The invention also relates to a computer program product and to an arrangement (BS1) for implementing the method, as well as to a heterogeneous network (1) comprising at least one such arrangement (BS1).

Abstract: A Method for inter-cell interference coordination in a cellular communication network (11) comprising multiple macro base stations (15) controlling at least one of multiple macro cells (13) of the cellular network (11) and at least one pico base station (21) controlling at least one pico cell (19) of the cellular network (11), said pico cell (19) being located at least partially within at least one macro cell (13) comprises—assigning (57) a first portion (B1) of radio transmission resources (53) of the cellular network (11) and a second portion (B2) of said transmission resources (53) to each of said multiple macro base stations (15) for transmitting a radio signal using the first portion (B1) and the second portion (B2) of said transmission resources (53) and—limiting a maximum transmission power of the radio signal to be transmitted using the second portion (B2) to a transmit power limit (Pred) less than a maximum transmit power (PE) of the signal to be transmitted using the first portion (B1).

Abstract: The invention concerns a method for downlink communication between a base station and a user terminal by means of a downlink superimposed radio signal comprising downlink data for the user terminal and for at least one further user terminal that are transmitted using the same radio resources, wherein the downlink data for the user terminal are transmitted with lower power than the downlink data for the at least one further user terminal, and control information is sent in downlink from the base station to the user terminal that enables the user terminal to decode the downlink data for the at least one further user terminal, a base station, a user terminal and a communication network therefor.

Abstract: The invention relates to a mobile telecommunication device (100) for establishing a telecommunication connection in the radio frequency range with a base station (102; 104; 1100), the mobile telecommunication device comprising; at least a first (106) and a second antenna (108), an electromagnetic shield (110) located between the first and the second antenna, a logic component (1000), wherein the first and the second antenna are adapted to transmit and receive telecommunication signals of the same frequency band, and wherein the logic component selects whether the first or the second antenna is used for the telecommunication connection with the base station.

Abstract: The present invention relates to a method for scheduling transmissions in a radio communication system comprising a plurality of base stations and a plurality of terminals, a base station being associated to a sector and transmitting/receiving data to/from terminals located in said sector. According to the present invention, the method comprises the steps of: determining an area around each given sector, said area comprising a set of sectors, allocating to said sectors in said area a scheduling priority chosen among at least two different scheduling priorities, scheduling decisions in a sector having a lower scheduling priority than a sector belonging to said area depending on scheduling decisions made for said sector with higher scheduling priority, said scheduling decisions made in said sector with higher scheduling priority being reported by said base station associated to said sector with higher scheduling priority to said base station associated to said sector with lower scheduling priority.

Abstract: The present invention relates to measurement in radio communication systems. In particular, the present invention relates to a sounding method in a cellular wireless communication system, the communication system itself and its components like base stations and mobile stations. The radio communication system (1) comprises at least one mobile station (2) and at least two base stations (3, 4). One of said base stations is a serving base station (3) for the mobile station (2) and the at least one further base station is a neighboring base station (4) of the serving base station (3). The serving base station (3) is adapted to generate a schedule for measurement signals and to transmit said schedule to the mobile station (2) and to the neighboring base station (4). The mobile station (2) is adapted to transmit measurement signals in accordance with said schedule to the serving base station (3) and to the neighboring base station (4).

Abstract: The present invention relates to a method for reducing interference in the downlink direction of a cellular radio communication system comprising base stations communicating with terminals using a frame structure showing a time and frequency extension, said frame comprising a preamble portion and at least one data portion, said terminals being adapted to receive frames for which the receive power of said at least one data portion is varying in a predefined range relative to the receive preamble power of said preamble portion, According to the present invention, the method comprises the steps of: transmitting the part of said data portion destined to said terminal with a transmit power adapted to generate a first receive power (Plow) at said terminal within said range if said terminal belongs to a first group of terminals; transmitting the part of said data portion destined to said terminal with a transmit power adapted to generate a second receive power(Phigh) at said terminal within said range, said secon

Abstract: The invention relates to a method of selecting link adaptation characteristics in a base station of an OFDM mobile digital communication system, the base station being coupled to at least one mobile station, the method comprising the steps of: measuring a mobile station's velocity in the mobile station; receiving a mobile station's velocity value from the mobile station by the base station; calculating a channel estimation and equalization with a first algorithm by the base station, if the mobile station's velocity value is smaller than a first threshold; activating a MIMO Matrix B and activating an AMC permutation mode by the base station, if the mobile station's velocity value is smaller than the first threshold, and if the mobile station occupies multiple antennas; activating a beamforming algorithm and activating the AMC permutation mode by the base station, if the mobile station's velocity value is smaller than the first threshold, and if the mobile station does not occupy multiple antennas.

Abstract: A radio access network, wherein the RAN comprises a plurality of base stations and a base station controller, wherein the BSC allocates radio resources (space, time, frequency, energy) of a resource domain, and wherein each base station may handle within a corresponding base station area a plurality of subscriber stations, is characterized in that each base station area is statically divided into a plurality of spatial subsectors, that a subset of the time-frequency domain of the resource domain is allocated to each of the subsectors, that the base stations collect traffic information for each subsector belonging to their respective base station area, the traffic information comprising interference conflict scenarios and traffic load, that the base stations summarize the traffic information for each subsector belonging to their respective base station area, that the base stations provide the base station controller with said summarized traffic information for each subsector belonging to their respective base

Abstract: The invention relates to a cellular broadband wireless access network for a railway/train comprising a plurality of access points (AP1?, . . . , AP5?) along the railway defining respective cells (CO1, . . . , CO5) of the wireless communications network, where the access points (AP1?, . . . , AP5?) are connected to at least one network gateway (GW) via an aggregation network, and where an access point (AP1?, . . .