Abstract: When a radio station terminates a first service on a first radio frequency channel and selects a second radio frequency channel for engaging in a second service, a time delay is inserted after the termination of the first service and before selecting the second radio frequency channel or before engaging in the second service. The time delay is dependent on the state of the radio station and/or a characteristic of the second service.

Abstract: The present invention relates to a method for signaling a plurality of transmission parameters for a plurality of communications between a primary station and a plurality of respective secondary stations in a multi-user MIMO mode, comprising the steps of (a) signaling the value of at least one first transmission parameter in a multicast message to at least two secondary stations, the value of the first transmission parameter being common to the respective communications corresponding to the at least two secondary stations, and (b) signaling the value of at least one second transmission parameter in a plurality of unicast messages to each secondary stations of the plurality of secondary stations.

Abstract: The present invention relates to 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 communicating in a network comprising a primary station and at least one secondary station, said secondary station comprising a buffer containing data packets to be transmitted to the primary station, the method comprising the step of the secondary station transmitting an indication of the buffer status to the primary station, said indication comprising information about history of said buffer.

Abstract: The present invention relates to a method for transmitting a plurality of data streams from a primary station to a secondary station on a plurality of transmission beams, said method comprising: at the secondary station measuring the channel quality corresponding to each transmission beam, and signalling at a first rate to the primary station in a first indicator a CQI report representative of the quality of the beams, and signalling at a second rate, greater than the first rate, in a second indicator a number of data streams that can be transmitted on the transmission beams; at the primary station transmitting the data streams on the basis of the first and second indicators.

Abstract: The present invention relates to a method for signaling a plurality of transmission parameters for a plurality of communications between a primary station and a plurality of respective secondary stations in a multi-user MIMO mode, comprising the steps of (a) signaling the value of at least one first transmission parameter in a multicast message to at least two secondary stations, the value of the first transmission parameter being common to the respective communications corresponding to the at least two secondary stations, and (b) signaling the value of at least one second transmission parameter in a plurality of unicast messages to each secondary stations of the plurality of secondary stations.

Abstract: In a radio communication system (100, 200) using a channel divided into a plurality of time slots, a control signal is transmitted in each time slot and a data signal is transmitted intermittently using a subset of the time slots. The control signal includes a portion which is a predetermined signal, such as a pilot signal, and one or more bits constituting a power control command. The format of the control signal is adapted according to whether or not data is transmitted in the same time slot. When data is not being transmitted, the proportion of the control signal which constitutes a power control command is increased and the energy of the control signal is reduced, at least by reducing the energy of the predetermined signal portion.

Abstract: The invention provides a method for efficiently defining E-RACH resources at least partly with reference to R99 RACH resources. This is achieved such that very little additional signaling is required on the BCH. E-RACH resources may be efficiently defined by signaled or predetermined differences from the R99 RACH resources. Resources for each PRACH are broadcast using the BCH. However, some UEs are configured to use E-RACH, for example by means of higher-layer signaling. In one embodiment, the resources available for each E-RACH for the configured UEs are given by the same set of signatures but the scrambling code and sub-channels are different. In another embodiment, the resources available for each E-RACH for the configured UEs are given by the same set of scrambling codes, but the signatures and sub-channels are different. In a typical, but not exclusive embodiment, the invention is applied in UMTS WCDMA.

Abstract: A method of interference coordination, base station and user equipment. The method comprises: precoding by a macro cell eNB the signals of the downlink control channel of scheduled macro cell UE by using pre-obtained precoded matrixes, such that the signal null space formed by precoding is pointed to pico cells and/or the characteristic value space of the signals is pointed to the macro cell UE. With such a method, almost all the interference caused by the PDCCH of the macro cell to the pico cell is eliminated, and the performances of the macro cell are not affected, solving the problem existed in the prior art; or improving the receiving performance of the macro cell UE, and further alleviating the interference of the macro cell on the pico cells.

Abstract: The present invention relates to method for communicating between a primary station and a secondary station comprising (a) at the secondary station, upon arrival of a data packet to be transmitted to the primary station, buffering said data packet in a buffer, and transmitting to the primary station a request for an uplink transmission resource if a request condition is satisfied, said request condition being based on at least one previous grant of uplink transmission resource, (b) at the primary station, granting to the secondary station an uplink transmission resource to be used.

Abstract: A radio communication station in a radio communication system having a plurality of radio communication devices, derives a quantisation parameter and transmits the quantisation parameter to the radio communication devices for use in subsequent quantisation of a channel state metric. The radio communication devices receive the quantisation parameter, determine a channel state metric, quantise the determined channel state metric by applying quantisation ranges indicated by the quantisation parameter, determine a data value indicative of the quantised channel state metric, and transmit a signal conveying the determined data value as a random access transmission.

Abstract: A method for transmission of control information from a primary station to at least one secondary station, includes transmitting with a first set of control information parameters control information corresponding to data transmission with a first set of data parameters, and transmitting with a second set of control information parameters control information corresponding to data transmission with a second set of data parameters. At least one control information parameter has a difference in value between the two sets of control information parameters, where the difference in value has a dependency on the difference between the value of a data parameter in the first set of data parameters and the value of the data parameter in the second set of data parameters. The data parameter is a different parameter from the at least one control information parameter.

Abstract: A method for transmitting data from a secondary station to at least one primary station includes the primary station transmitting on a signaling channel to the secondary station a resource allocation message allocating resource blocks for transmission of data from the secondary station. The resource allocation message includes a field for allocating resources in a first domain, where at least one bit of the field is stolen to allocate resources in a second domain which is different from the first domain.

Abstract: The present invention relates to method for communicating between a primary station and a secondary station comprising (a) at the secondary station, upon arrival of a data packet to be transmitted to the primary station, buffering said data packet in a buffer, and transmitting to the primary station a request for an uplink transmission resource if a request condition is satisfied, said request condition being based on at least one previous grant of uplink transmission resource, (b) at the primary station, granting to the secondary station an uplink transmission resource to be used.

Abstract: A radio communication station in a radio communication system having a plurality of radio communication devices, derives a quantization parameter and transmits the quantization parameter to the radio communication devices for use in subsequent quantization of a channel state metric. The radio communication devices receive the quantization parameter, determine a channel state metric, quantize the determined channel state metric by applying quantization ranges indicated by the quantization parameter, determine a data value indicative of the quantized channel state metric, and transmit a signal conveying the determined data value as a random access transmission.

Abstract: The present invention relates to a method for allocating resources to a plurality of secondary stations for enabling communication between a primary station and the plurality of secondary stations, comprising the steps of a) grouping the resources into at least a first set of resources and a second set of resources; b) allocating a first resource of the first set of resources to a first secondary station, said first resource having a first index in the first set of resources; c) allocating a second resource of the second set of resources to the first secondary station, said second resource having a second index in the second set of resources being equal to the first index plus an offset based at least partly on other information known to the primary and first secondary station.

Abstract: In a radio communication system having a primary station and a plurality of secondary stations, the power of uplink and downlink channels between the primary station and a secondary station is controlled in a closed loop manner by each station transmitting power control commands to the other station. In response to these commands the receiving station adjusts its output power in steps. By combining a plurality of received power control commands before adjusting its output power the receiving station may emulate the ability to use a smaller power control step size than its minimum, thereby improving performance under certain channel conditions. In one embodiment when the required power control step size is less than the minimum step size of a particular station, that station processes a group of power control commands to determine whether to adjust its output power by its minimum step size. In an alternative embodiment the power control step size is fixed when the combining algorithm is used.

Abstract: A radio communication system comprises a secondary station (110) having a plurality of communication channels (226a,226b,226c) with a plurality of primary stations (100a,100b,100c). Separate closed loop power control is performed for each of the communication channels (226a,226b, 226c). This enables the optimum primary station for transmission of data to the secondary station (110) to be selected. Parameters derived from operation of each power control loop enable optimum setting of channel parameters for each primary station (100a,100b,100c). Such an arrangement is particularly suitable for a high speed downlink data service, where the fast selection of the optimum primary station and/or channel parameters improves link robustness and system throughput.

Abstract: A communication system comprises a downlink indicator channel (DL1) for the transmission of a indicator signal (302) indicating that a data packet (202) is scheduled to be transmitted on a downlink data channel (DLz) from a primary station to a secondary station. In operation, on detection of the indicator signal, the secondary station transmits a status signal, for example a negative acknowledgement signal (204), on an uplink channel (UL) to the primary station immediately before transmission of a positive (206) or negative acknowledgement signal to indicate the status of the received data packet. By providing the primary station with two chances to detect the case where the secondary station fails to detect the indicator signal, peak power requirements of the uplink channel can be reduced, thereby reducing system interference levels.

Abstract: A radio station (100) receives a data packet (D1, D2) and transmits an acknowledgement (ACK, N). It also transmits an indication of received signal quality (CQI). The time at which the indication of received signal quality (CQI) is transmitted is dependent on the type of acknowledgement transmitted, such as a positive acknowledgement (ACK) or negative acknowledgement (N).