Alcatel Lucent

Alcatel

Christian Gerlach

Thorsten Wild

Andreas Weber

Matthew P J Baker

Howard C Huang

Volker Braun

Bozo Cesar

Oliver Stanze

Rupert Rheinschmitt

Qi Jiang

Matthew Baker

Teck H Hu

Stephen Kaminski

Uwe Doetsch

Bernd Haberland

Heidrun Grob-Lipski

Dietrich Zeller

Osman Aydin

Manfred Litzenburger

Paul A M Buné

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.

Method for interference reduction in a radio communication system, processing unit, and wireless access network node thereof

The invention proposes method of providing measurement reports. The eNodeB sends (S, S) a user equipment information about a plurality of subframe patterns used by a plurality of wireless networks respectively, and notifies (S, S) the user equipment associations between the measurement reports and said plurality of subframe patterns. The user equipment measures (S) channel information in at least one subframe patterns, generates measurement reports for said at least one subframe patterns according to said association, and sends (S, S) said measurement reports to said eNodeB. The eNodeB relates (S) each of the received measurement reports with the corresponding subframe pattern according to said association.

Methods and devices for providing measurement reports

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

Method for beam coordination, and a base station and a user terminal therefor

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. According to the present invention, the method comprises the steps of: &#x2022;Expressing said precoding weights used at said multiple antenna system as a combination of two types of precoding weights, a first type of precoding weights relating to long term channel information and a second type of precoding weights relating to short term channel changes; &#x2022;Sending on said feedback channel from said first user an indication related to precoding weights of said first type which, if used at said multiple antenna system for communication with a second user, would cause interference below a threshold on said first user if both said first and second users were scheduled on identical resources.

Method for scheduling users in a mobile or wireless communication system, corresponding mobile terminal and base station

The invention relates to a method for joint processing of uplink data (g(n), s(n)) transmitted from at least one user equipment (UE, UE) to a plurality of coordinated reception points (BS, BS) of a wireless communication system (), the method comprising: estimating and preferably compensating for individual propagation delays of the uplink data (g(n), s(n)) transmitted from one of the user equipments (UE, UE) to the coordinated reception points (BS, BS), and compensating a timing difference between a propagation delay of a coordinated reception point (BS, BS) which serves the user equipment (UE, UE) and at least one propagation delay of at least one coordinated reception point (BS, BS) which does not serve the user equipment (UE, UE) for performing the joint processing of the uplink data (g(n), s(n)), wherein the step of compensating the timing difference comprises modifying a channel matrix (H) associated with uplink channels from the at least one user equipment (UE, UE) to the coordinated reception points (BS, BS). The invention also relates to a processing arrangement (BS, BS) adapted for performing the method.

Method and processing arrangement for joint processing of uplink data

The invention concerns a method for performing adaptive subcarrier allocation to a mobile terminal (T-T) for OFDM or FDM transmission in a multi cell network (CN), whereby transmit powers of base stations (BS-BS) are estimated, channel transfer functions are calculated based on measurements in the mobile terminal (T-T) of pilots transmitted from base stations (BS-BS), the transmit powers are weighted with the channel transfer functions, a signal power and an interference power received in the mobile terminal (T-T) are estimated based on said weighted transmit powers, a signal to interference ratio is estimated based on the estimated signal and interference power received in the mobile terminal (T-T), and the adaptive subcarrier allocation is based on the signal to interference ratio of the subcarriers experienced by the mobile terminal (T-T), a base station (BS-BS), a mobile terminal (T-T) and a multi cell network (CN) therefor.

Adaptive subcarrier allocation to a mobile terminal in a multi cell FDM or OFDM network

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.

Transmission of precoding codebook over an air interface

The invention concerns a method for automatic resource restriction distribution for coordination of the interference between cells (C, C, . . . ) or sectors (S, S, . . . ) of a single frequency network with the frequency band being subdivided into at least two subsets (F, F. . . FR), whereby mobile terminals (T) in the single frequency network perform power measurements of pilot symbols, based on said power measurements, the signal to interference ratio and the data throughput in the cells (C, C, . . . ) in case of no interference coordination and in case of interference coordination is calculated, and at least one dedicated subset of said at least two subsets (F, F. . . FR) is chosen for usage with restricted power in such a way that the overall data throughput in the cells (C, C, . . . ) is maximized, a base station, a mobile terminal, a resource distribution device and a mobile network therefor.

Method for automatic resource restriction distribution, a base station, a mobile terminal, a resource distribution device and a mobile network therefor

The invention concerns a method for coordination of the interference in the uplink between cells (B,B) of a single frequency network with the frequency band used for uplink being subdivided into at least two subsets(FF. . . FR), whereby a resource related to a dedicated subset is allocated to a mobile terminal (T) located in a first cell (B) of said cells in the border area to a neighbor cell (B-B), the based station of the cell (B) with the highest interference damage caused by the mobile terminal (T) accepts a high interference level on said dedicated subset dependent on network criteria, and the usage of said dedicated subset in the cell (B) with the highest interference damage caused by the mobile terminal (T) is restricted under observation of the interference level, a base station, a mobile terminal and a mobile network therefor.

Method for uplink interference coordination on demand basis with cell identification, inter-cell interference detection and downlink measurement, a base station, a mobile terminal and a mobile network therefor

The invention concerns a method for OFDM data transmission in a single-frequency multi-cell mobile network from and to mobile terminals (MT) with channel estimation by means of pilots (PILOT) of a pilot subgrid in an OFDM time-frequency grid, whereby the positions of the pilot subgrids of different cells of the mobile network are randomly or pseudo-randomly distributed, a base transceiver station, a base station controller, a mobile terminal and a mobile network therefor.

Method for OFDM data transmission in a single-frequency multi-cell mobile network with channel estimation by means of pilots subgrid, a base transceiver station, a base station controller, a mobile terminal and a mobile network therefor

A method of performing resource allocation in OFDM transmission is disclosed. The method includes performing a partitioning of the OFDM spectrum into a number of predefined regions (Rij, R'ij) of sub-carriers (SCi) for a number of OFDM transmission cells, assigning at least one respective transmission-related characteristic to the regions of sub-carriers, and allocating the resources for communication with at least one user equipment in at least one region of sub-carriers based on the partitioning and dependent on the characteristic assigned to the regions of sub-carriers. This allows fast resource allocation with low signaling effort, as well as fast adjustment to changing system settings or changing systems conditions, while providing a possible alternative to costly handover procedures.

Method of performing resource allocation, base station, central node, and computer program product for OFDM transmission

The invention concerns method for scheduling of user terminals (T) to subcarriers in a multi-cell or multi-sector network using FDM transmission with interference coordination and with the frequency band used for FDM transmission being subdivided into at least two frequency subsets (F, F. . . FR), whereby the data throughput of user terminals (T) is measured or modeled by means of the signal to interference ratio measured by said user terminals (T) dependent on the frequency subset (F, F. . . FR), subcarriers are allocated preferably to user terminals (T) with a high signal to interference ratio on said subcarriers, and subcarriers are allocated in clusters to the user terminals (T), whereby all clusters offer the same data throughput for the respective user terminal (T), a base station (BS), a user terminal (T) and a network therefor.

Method for scheduling of user terminals to subcarriers in a multi-cell or multi-sector network using FDM transmission, a base station, a user terminal and a network therefor

A method for terminal-assisted interference control in a mobile communication system employing multi-carrier techniques such as OFDM, the mobile communication system comprising a network with a plurality of base stations controlled by a central entity, and the base stations having means for communication with user terminals located inside their cell service area, wherein the central entity schedules time-frequency groups available, for data communication purposes between the terminals and the base station, for the base stations under its control and the terminals involved in the scheduling process, each time interval.

Growing community of inventors

Ditzingen, Germany

Christian Gerlach