Abstract: The present invention relates to a method for communicating in a network comprising at least one primary station communicating with at least one secondary station, comprising (a) the secondary station sending to the primary station a buffer status report representative of the amount of data in a buffer of the secondary station, (b) in absence of acknowledgement from the primary station, the secondary station retransmitting the buffer status report and, (c) if a maximum number of retransmissions has been reached, the secondary station sending a further buffer status report to the primary station.

Abstract: A packet data transmission system comprises primary stations (PS) having signal transmitting and receiving means and antennas (PA1 to PA4) for propagating downlink signals and receiving uplink signals and a plurality of secondary stations (SS) able to roam within the coverage areas of the primary stations. Each secondary station (SS1) has signal transmitting and receiving means, a predetermined number of antennas (SA1 to SA4), and means for monitoring its radio environment. Information about the radio environment is relayed as an uplink signal to the respective primary station which modifies its mode of transmission of packet data signals. The secondary station in response to the modified mode of transmission of the downlink signals adapts its receiver resources to process the packet data signals and effect cancellation of any interference.

Abstract: The present invention relates to a method for operating a secondary station in a network, the secondary station comprising a transceiver adapted for simultaneously receiving transmissions from a primary station controlling a first cell and at least one primary station controlling a second cell, the method comprising the secondary station (a) selecting a first precoding matrix for the first cell out a primary set of precoding matrices for the first cell, (b) selecting a subset of at least one precoding matrix for the at least one second cell in dependence on the first precoding matrix, out of a set of subsets of precoding matrices for the second cell, (c) selecting a second precoding matrix for the at least one second cell out of the selected subset of precoding matrices for the second cell, (d) transmitting a first indicator representative of the first precoding matrix.

Abstract: The present invention relates to method for communicating in a network, said network comprising a primary station and at least one secondary station having a plurality of antennas, the method comprising the step of the primary station transmitting to a first secondary station an indication of a first receive combining matrix that the first secondary station should use to combine the signals received at its said plurality of antennas from a first subsequent transmission from the primary station.

Abstract: The present invention relates to a method for operating a network comprising a first primary station and a second primary station, wherein the first primary station serves a first cell including at least one first secondary station communicating with the first primary station and wherein the second primary station serves a second cell including at least one second secondary station communicating with the second primary station, the method comprising the steps of (a) the first primary station and the second primary station transmitting payloads in a synchronous manner on at least one set of resources, (b) the first and the second primary stations transmitting control data on the at least one set of resources respectively to the first secondary station and to the second secondary station, wherein the method further comprises (c) at least the first primary station rendering the transmission of control data to the first secondary station orthogonal to the transmission of control data from the second primary stati

Abstract: In a method for operating a secondary station in a network, the secondary station: controlling a transceiver configured for simultaneously receiving transmissions from a first primary station controlling a first cell and at least one second primary station controlling a second cell; selecting a first precoding matrix for the first cell out of a first set of precoding matrices for the first cell; selecting, depending on the first precoding matrix, in accordance with a precoding scheme, a subset out of a second set of precoding matrices for the second cell, the subset comprising at least one precoding matrix for the second cell; selecting a second precoding matrix for the at least one second cell out of the selected subset of precoding matrices; transmitting a first and second indicator representative of the respective first and second precoding matrix; wherein the second precoding matrix is based on the value of the first indicator, so that the amount of data used for transmitting the second indicator is less

Abstract: The present invention relates to a method for operating a network comprising a primary station communicating with a plurality of secondary stations, the method comprising the primary station communicating with a secondary station in a discontinuous mode; the secondary station transmitting to the primary station a control message based on the current status of the secondary station, the primary station changing a parameter of the discontinuous mode based on the control message. a change in physical location, a change in a velocity, a change in an acceleration, a change in a motion, a change in a context, a change in connectivity in the network, a change in connectivity outside the network, a handover to a different cell RAT, a change in power, a change in quality of service (QoS), a time of day and an expiration of a timer.

Abstract: The present invention relates to the signaling of channel quality information in a multi-beam transmission system, wherein a plurality of beams are simultaneously transmitted and a plurality of sets of channel quality information are transmitted for controlling independently the transmission rate on the different beams. Determined are beams with a different quality resulting in different effects of errors in the transmissions of the channel quality information for the beams. Said different effects are exploited for reducing a signaling overhead of the channel quality information for the beams.

Abstract: The present invention relates to a control method for a communication network that has a transmitter with an array of transmit antennas and that has at least one receiver communicating with the transmitter. The receiver performs a channel measurement for a receive antenna of the receiver using a signal transmitted from the transmitter to the receiver. The receiver further determines channel coefficients for each of an array of transmit antennas at the transmitter from an output of the channel measurement, and then applies a linear, reversible and orthogonal transform to the channel coefficients, thus ascertaining channel component coefficients indicative of the individual weight of respective channel components in a transform domain. The receiver then selects one or more channel components in the transform domain and communicates to the transmitter a control signal indicative of one or more preferred channel components or a magnitude of one or more channel component coefficients, or both, in quantized form.

Abstract: The present invention relates to a method for operating a secondary station comprising means for communicating with a primary station, the method comprising receiving from the primary station an interference status report, said interference status report comprising an spatial indication being representative of a spatial characteristic of the interference, measuring channel characteristics on reference symbols, and interpreting the measured channel characteristics with help of the interference status report.

Abstract: The present invention relates to a method for operating a network comprising a primary station communicating with a plurality of secondary stations, the method comprising the primary station communicating with a secondary station in a discontinuous mode; the secondary station transmitting to the primary station a control message based on the current status of the secondary station; the primary station changing a parameter of the discontinuous mode based on the control message.

Abstract: The present invention relates to a method for communicating in a network, the network comprising at least a first cell and a second cell including respectively a first primary station having a first antenna array dedicated to the first cell and a second primary station having a second antenna array dedicated to the second cell, for communicating with a plurality of secondary stations.

Abstract: The present invention relates to the signaling of channel quality information in a multi-beam transmission system, wherein a plurality of beams are simultaneously transmitted and a plurality of sets of channel quality information are transmitted for controlling independently the transmission rate on the different beams. Determined are beams with a different quality resulting in different effects of errors in the transmissions of the channel quality information for the beams. Said different effects are exploited for reducing a signaling overhead of the channel quality information for the beams.

Abstract: The present invention relates to a method for operating a communication system, said communication system comprising a primary and at least one secondary station, wherein the primary station selects a transmission mode from a set of at least two transmission modes for communicating with the secondary station, and wherein the secondary station infers the selected transmission mode based on at least one control channel characteristic.

Abstract: A method for communicating in a network between a primary station and at least one secondary station on a downlink control channel, wherein the primary station transmits an indication related to a resource allocated to one of the secondary stations in accordance with a semi persistent schedule, wherein at least two messages, which include at least part of the indication, are transmitted in one subframe.

Abstract: The present invention relates to a method for operating a secondary station comprising means for communicating with a primary station, the method comprising receiving from the primary station an interference status report, said interference status report comprising an spatial indication being representative of a spatial characteristic of the interference, measuring channel characteristics on reference symbols, and interpreting the measured channel characteristics with help of the interference status report.

Abstract: The invention relates to a method for operating a secondary station, the secondary station communicating with at least one primary station by means of MIMO transmissions, the method comprising the secondary station signaling a single precoding indicator representative of a set of recommended precoding coefficients to the primary station, wherein the same set precoding indicator applies for a plurality of available transmission modes.

Abstract: The present invention relates to a method for communicating in a network, said network comprising a primary station and at least a first secondary station, wherein the first secondary station transmits to the primary station an indication of a first plurality of precoding vectors, wherein the number of first precoding vectors is greater than a preferred rank of transmission from the primary station to the first secondary station.

Abstract: The present invention relates to a method for operating a communication system in a network, the system comprising a primary station and at least one secondary station, the primary station comprising a plurality of transmit antennas and the secondary station comprising a plurality of receive antennas, the method comprising the steps of the primary station selecting a first communication scheme among a plurality of communication schemes, the primary station computing a transmission vector on the basis of the first communication scheme, the secondary station computing a reception vector on the basis of a second communication scheme, the second communication scheme being selected among the plurality of communication schemes by the secondary station on the assumption that a predetermined communication scheme is being used by the primary station.

Abstract: A precoding codebook matrix/vector of length 2L is generated by the selection of two matrices/vectors, each from one of a predetermined set of L×L matrices and multiplying each column of one of the matrices/vectors by a complex coefficient.