Abstract: There is provided mechanisms for transmitting a downlink (DL) grant and DL data to a wireless device. A method is performed by a network node. The method comprises obtaining an indication for providing the DL data to the wireless device. The method comprises transmitting, in a transmission time interval (sTTI) frequency band, the DL grant for the wireless device and the DL data for the wireless device. A position of the DL grant in the sTTI frequency band identifies a position of the DL data in the sTTI frequency band. There is also provided a network node configured to perform such a method. There is further provided mechanisms for receiving a DL grant and DL data from a network node, as performed by a wireless device.

Abstract: The present solution ensures that the UEs are able to make use of all the available reference signals that can be used in a cell for performing UE measurements, estimations or demodulations. That is achieved by indicating on a downlink common or shared channel, the MIMO mode settings associated with a specific network node. The indicated MIMO mode settings explicitly or implicitly indicate available common reference signals and/or dedicated reference signals to be used for said UE measurements, estimations or demodulations, which implies that measurements, estimations or demodulations can be performed based on said received indication.

Abstract: A receiving unit or a transmitting unit of a wireless network, and method therefor, for facilitating noise and interference measurements on an air interface. The receiving unit includes: a network interface which obtains information relating to a time-varying layout of a silent resource element (RE) grid; an electronic memory having code in communication with the network interface which stores the information; and a processing unit in communication with the electronic memory that takes a presence of a silent RE grid into account in the reception of a control or a data channel. Information relating to a time-varying layout of a silent resource element (RE) grid is obtained and a presence of a silent RE grid is taken into account in the reception of a control or a data channel.

Abstract: A method and a network node (110, 111) for determining first channel state information in an upcoming time slot for use by a first radio network node (111) when determining a set of radio transmission parameters for a transmission between the first radio network node (111) and a second radio network node (121) are provided. The network node (110, 111) receives (201) second channel state information for said upcoming time slot. Furthermore, the network node (110, 111) determines (207) third channel state information for said upcoming time slot. The second and third channel state information are at least partly non-overlapping with each other. Next, the network node (110, 111) determines (208) the first channel state information, for said upcoming time slot, based on the second channel state information and the third channel state information.

Abstract: The invention discloses a beamforming method for polarized antenna array consisting of a plurality of antenna elements, applied to single layer beamforming or dual layer beamforming, which includes the steps: determining (201) first beamforming weights for phase compensation among the antenna elements within each polarization direction; determining (202) second beamforming weights for phase compensation between equivalent channels of two polarization directions; and calculating (203) hybrid beamforming weights as product of the first beamforming weights and the second beamforming weights. A beamforming apparatus for polarized antenna array is also provided in the invention as well as a radio communication device and a system thereof. With the invention, the single-layer and dual-layer beamforming weights are determined for the cross-polarized antenna array without requiring full channel knowledge or the aid of PMI. Computation complexity is lowered and full power amplifier utilization can be achieved.

Abstract: The present invention provides a method for performing channel estimation and detection in a Multiple-Input-Multiple-Output (MIMO) system, including: generating a demodulation reference signal, DM-RS, pattern for an extended cyclic prefix (CP); and estimating and detecting channel performance based on the generated DM-RS signal pattern. The DM-RS pattern supports from rank 1 to rank 8 patterns for 8 layer transmission. A transmitter, a receiver and a system thereof are also provided. The solution of the present invention improves channel estimation accuracy, saves channel estimation implementation and implementation complexity at terminals.

Abstract: A base station in a communications network broadcasts a cell-specific instruction to a plurality of mobile terminals in a cell served by the base station. The cell-specific instruction indicates that an uplink symbol has been semi-statically configured for aperiodic sounding reference signal (SRS) transmission over multiple subsequent subframes. The base station dynamically determines that a first mobile terminal of the plurality of mobile terminals is to use the uplink symbol for SRS transmission in a given one of the multiple subsequent subframes. In response, the base station signals a first terminal-specific instruction to the first mobile terminal. The first terminal-specific instruction is distinct from the cell-specific instruction and indicates that the first mobile terminal is to use the uplink symbol for SRS transmission in the given subframe.

Abstract: Methods of operating a network node in a RAN may include transmitting control information for a subframe from the network node to a wireless terminal. The control information may include a Time Domain Split (TDS) indication defining a sub-subframe of the subframe, and a duration of the sub-subframe may be less than a duration of the subframe. Moreover, communication of data may be provided between the network node and the wireless terminal during the sub-subframe of the subframe. Methods of operating the wireless terminal may include receiving the control information for the subframe at the wireless terminal from the network node. The control information may include the TDS indication, and communication of the data may be provided between the wireless terminal and the network node during the sub-subframe of the subframe. Related network nodes and wireless terminals are also discussed.

Abstract: A technique for operating a network node in a heterogeneously deployed network comprising network nodes of different nominal transmit powers and at least partially overlapping coverage areas is described. A method implementation of this technique comprises a step of operating the network node in a base mode in which the network node is configured to transmit terminal-specific demodulation reference signals for a first set of terminal devices. The method comprises the further step of selectively activating or deactivating operation of the network node in a Single Frequency Network (SFN) mode in which the network node is configured to transmit, for a second set of terminal devices, the same cell-specific reference nodes as another network node of the heterogeneously deployed network that has a larger nominal transmit power.

Abstract: The present invention relates to a group (G1, G2) of at least two transceiver units (1, 2; 3, 4) in at least one wireless communication system. The transceiver units (1, 2; 3, 4) in the group (G1, G2) are arranged for wireless communication with at least one other transceiver unit. The transceiver units (1, 2; 3, 4) in the group (G1, G2) are arranged to transmit signals with polarizations that are essentially parallel to each other when received by at least one transceiver unit for which the transmitted signals (5, 6) constitutes interference. The present invention also relates to a method, a node and a transceiver unit.

Abstract: Systems and methods of signaling uplink control information in a mobile communication network using carrier aggregation are provided. In one exemplary embodiment, a method may include scheduling downlink transmissions to a first user terminal on a single downlink component carrier (CC) associated with a primary cell and scheduling downlink transmissions to a second user terminal on multiple downlink CCs or on a downlink CC associated with a non-primary cell. Further, the method may include receiving, on a first set of radio resources, control information associated with the downlink transmissions to the first user terminal. In addition, the method may include receiving, on a second set of radio resources, control information associated with the downlink transmissions to the second user terminal.

Abstract: The present invention relates to methods and apparatus for providing a more flexible configuration of sounding reference signal, SRS, transmission. This is achieved by dynamically triggering a mobile terminal to transmit SRS. Thus, embodiments of the invention include a method implemented by a base station in a communications network that semi-statically configures some uplink symbols for periodic SRS transmission and other uplink symbols for aperiodic SRS transmission. The method includes dynamically determining whether an uplink symbol that has been semi-statically configured for aperiodic SRS transmission is to be used by a given mobile terminal at a given time for SRS transmission. The method then further includes signaling a terminal-specific instruction that indicates said determination to the given mobile terminal.

Abstract: The technology disclosed provides the ability for a subframe to be dynamically configured in time division duplex (TDD) communications between a UE radio terminal and a radio network node. A frame structure includes one or more subframes preconfigured as a downlink subframe, one or more subframes preconfigured as an uplink subframe, and one or more dynamically configurable subframes. Each dynamically configurable subframe includes a guard time period and at least a downlink part for transporting a dynamically configurable amount of downlink information, and in some embodiments, uplink information. A configuration for dynamically configurable subframes is determined for transmission and/or reception between the UE radio terminal and the radio network node.

Abstract: Some embodiments herein relate to method in a user equipment for determining a transmit power to be used by the user equipment when transmitting in a radio communications network, which user equipment is served by a radio network node in the radio communications network. The user equipment receives, from the radio network node, an indication indicating a set of power control parameters out of multiple sets of power control parameters, which multiple sets of power control parameters are stored at the user equipment. The user equipment determines a transmit power based on the indicated set of power control parameters.

Abstract: The invention is a method and apparatus for signaling uplink control information in a mobile communication network using carrier aggregation. The signaling mechanism allows the transmission, on a single uplink component carrier, of control information associated with a downlink transmission on multiple aggregated downlink component carriers. Semi-statically reserved resources for the transmission of control information on the uplink component carrier may be dynamically shared by user terminals that are assigned multiple downlink component carriers for downlink transmissions. Implicit or explicit resource indication can be used in combination with dynamic resource indication.

Abstract: A user equipment (UE) in a cellular telecommunications system is able to detect the uplink/downlink configuration of a detected neighboring cell by receiving a signal from the neighboring cell. A characteristic of the received signal is detected and used as an indicator in a blind detection process to identify one or more downlink slots in the received signal. Known pilot signals in the identified one or more downlink slots can then be used to obtain a signal power measurement of the received signal. The blind detection process is also capable of detecting whether a slot of a neighboring cell's signal is a downlink unicast slot or a Multicast-Broadcast Single Frequency Network slot.

Abstract: In a cellular system (100), transmissions are made (410) in subframes (310) which comprise subelements. The method is used for scheduling (415) first and second channels in a subframe, and comprises: dividing (420) the transmission resources for the first channel into a first set of resource groups, assigning (425) the resource groups of the first set to subelements in the subframe (310) in a predetermined fashion, assigning (430) a symbol value to all subelements (210) in the subframe (310) which have not been assigned a resource groups of the first set, dividing (435) the transmission resources for the second channel into a second set of resource groups, assigning (440) the resource groups of the second set to subelements in the subframe by means of said symbol values.

Abstract: Some embodiments herein relate to method in a user equipment (10) for determining a transmit power to be used by the user equipment when transmitting in a radio communications network, which user equipment (10) is served by a radio network node (12,12?) in the radio communications network. The user equipment (10) receives, from the radio network node (12,12?), an indication indicating a set of power control parameters out of multiple sets of power control parameters, which multiple sets of power control parameters are stored at the user equipment (10). The user equipment (10) determines a transmit power based on the indicated set of power control parameters.

Abstract: A base station is described herein which implements a method that uses different aspects of reported channel quality information (CQI) measurements to help select the “best” transmit antenna(s) on which to transmit control channel information to mobile terminal(s). The base station can also transmit a format indicator to communicate the assigned control channel transmit antenna(s) and the assigned data transmit antenna(s) to the mobile terminal(s).

Abstract: Method and arrangements for scheduling transmission resources in a first node in a cell comprised within a wireless communication network. The first node is arranged to communicate over a communication channel with at least one user equipment within the cell. The communication is made by using a frame comprising uplink resources and downlink resources with a switching point between the downlink resources and the uplink resources. The method comprises the step of obtaining a parameter referring to the expected transmission quality of the communication and/or the expected coherence properties of the communication channel. The method also comprises scheduling a transmission on an uplink or downlink resource. The resource is located on a time distance from the switching point. The time distance is based on the obtained parameter.