Abstract: The invention concerns a method for coordination of transmission from a first and at least one further base station (M1, P1), wherein said first base station (M1, P1) evaluates the usage by said at least one further base station (M1, P1) of at least one subframe, and said first base station (M1, P1) uses said at least one subframe for transmission dependent on the evaluated usage by said at least one further base station (M1, P1) of said at least one subframe, and a base station therefore.

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: Embodiments relate to an apparatus, a method and a computer program for a base station transceiver (100) for a mobile communication system (300). The base station transceiver (100) is operable in a coverage area (205) of another base station transceiver (200). The other base station transceiver (200) is operable to transmit radio signals in a repetitive sequence of radio frames, wherein in at least one of the radio frames in the sequence the other base station transceiver (200) is operable to transmit with a reduced transmission power or to suspend transmission compared to at least one other of the radio frames in the sequence. The apparatus (10) comprises an interface (12) operable to receive sequence information on the at least one of the radio frames in the sequence, during which the other base station transceiver (200) is operable to transmit with the reduced transmission power or to suspend transmission compared to the at least one other of the radio frames in the sequence.

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: Embodiments relate to an apparatus, a method and a computer program for a base station transceiver (100) for a mobile communication system (300). The base station transceiver (100) is operable in a coverage area (205) of another base station transceiver (200). The other base station transceiver (200) is operable to transmit radio signals in a repetitive sequence of radio frames, wherein in at least one of the radio frames in the sequence the other base station transceiver (200) is operable to transmit with a reduced transmission power or to suspend transmission compared to at least one other of the radio frames in the sequence. The apparatus (10) comprises an interface (12) operable to receive information on the at least one of the radio frames in the sequence and a controller (14) operable to determine information on a measurement configuration for a mobile transceiver (400) associated to the base station transceiver (100) based on the received information.

Abstract: Embodiments provide an apparatus, a method and a computer program for scheduling a data transmission. The apparatus 10 is operable for scheduling data transmissions to a mobile transceiver in a mobile communication system. The apparatus 10 comprises means for determining 12 a delay between a transmission of a first data packet and a transmission of a next data packet to the mobile transceiver, the delay depending on an acknowledgement packet received from the mobile transceiver for the first data packet. The apparatus 10 further comprises means for scheduling 14 data transmissions to the mobile transceiver based on the delay.

Abstract: The invention concerns a method for performing a handover of a user terminal (UE_A_MA) in a wireless communication network (CN), wherein a permission for performing a handover from a base station of a first operator (MA) to a base station of a second operator (PB, MB) depends on at which of said first and second operator said user terminal (UE_A_MA) is registered, and a base station (MA) and a user terminal (UE_A_MA) therefor.

Abstract: The present invention relates to a method in a wireless communication system including at least a first network (103), a second network (101) and a third network (105), wherein the second network (101) provides a first pattern indicating a first set of time periods (201) during which the data transmissions on the second communication channel is limited while the data transmissions on the first communication channel is scheduled, the method comprising: receiving, by the third network (105), information indicating the first pattern; and scheduling, by the third network (105), data transmissions on a third communication channel in the third network (105) based on the first pattern.

Abstract: Embodiments provide an apparatus, a method and a computer program for scheduling a data transmission. The apparatus 10 is operable for scheduling data transmissions to a mobile transceiver in a mobile communication system. The apparatus 10 comprises means for determining 12 a delay between a transmission of a first data packet and a transmission of a next data packet to the mobile transceiver, the delay depending on an acknowledgement packet received from the mobile transceiver for the first data packet. The apparatus 10 further comprises means for scheduling 14 data transmissions to the mobile transceiver based on the delay.

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

Abstract: Embodiments relate to an apparatus, a method and a computer program for a base station transceiver (100) for a mobile communication system (300). The base station transceiver (100) is operable in a coverage area (205) of another base station transceiver (200). The other base station transceiver (200) is operable to transmit radio signals in a repetitive sequence of radio frames, wherein in at least one of the radio frames in the sequence the other base station transceiver (200) is operable to transmit with a reduced transmission power or to suspend transmission compared to at least one other of the radio frames in the sequence. The apparatus (10) comprises an interface (12) operable to receive sequence information on the at least one of the radio frames in the sequence, during which the other base station transceiver (200) is operable to transmit with the reduced transmission power or to suspend transmission compared to the at least one other of the radio frames in the sequence.

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: Embodiments relate to an apparatus, a method and a computer program for a base station transceiver (100) for a mobile communication system (300). The base station transceiver (100) is operable in a coverage area (205) of another base station transceiver (200). The other base station transceiver (200) is operable to transmit radio signals in a repetitive sequence of radio frames, wherein in at least one of the radio frames in the sequence the other base station transceiver (200) is operable to transmit with a reduced transmission power or to suspend transmission compared to at least one other of the radio frames in the sequence. The apparatus (10) comprises an interface (12) operable to receive information on the at least one of the radio frames in the sequence and a controller (14) operable to determine information on a measurement configuration for a mobile transceiver (400) associated to the base station transceiver (100) based on the received information.

Abstract: The invention concerns a method for coordination of transmission from a first and at least one further base station (M1, P1), wherein said first base station (M1, P1) evaluates the usage by said at least one further base station (M1, P1) of at least one subframe, and said first base station (M1, P1) uses said at least one subframe for transmission dependent on the evaluated usage by said at least one further base station (M1, P1) of said at least one subframe, and a base station therefore.

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: Embodiments relate to methods and apparatuses for scheduling a mobile terminal (11) associated to a serving cell (12; 22) of a cellular communication system, comprising classifying (51) the mobile terminal into a cell-center or cell-border mobile terminal (11-1; 11-2) based on a quality of a wireless communication channel between the mobile terminal and the serving cell (12; 22) and based on a quality of a wireless communication channel between the mobile terminal and a neighbor cell (18; 28), and scheduling (53) a classified cell-border mobile terminal (11-2) using radio resources (21) which are at least partially suspended from transmission by the neighbor cell (18; 28), and to schedule a classified cell-center mobile terminal (11-1) using radio resources (23) which are not suspended from transmission by the neighbor cell (18; 28).

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 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).