Abstract: A modular blade connection structure includes a first module, a second module and a structural adhesive module. The first module is provided on an end face thereof with a bonding flange extending into the second module; a gap between the butting surfaces of the first module and the second module is injected with a structural adhesive, which is extruded and cured to form a structural adhesive module; and the thickness of the first module at the starting end of the bonding flange extends towards the inner surface to form a first reinforcement, and the structural adhesive module extends inside the second module in a direction away from the bonding flange to form a second reinforcement. The present disclosure facilitates the control the bonding quality of the double-sided overlapping of the modular blade by means of the bonding flange and the improvement of the fatigue resistance at the assembling position.

Abstract: Embodiments of the present disclosure relate to compressed channel state information transfer. According to embodiments of the present disclosure, the radio unit at the base station receives signals from the terminal device. The radio unit (RU) compresses the signal based on the weights of beams and transmits the compressed signal to the baseband unit (BBU) at the base station. The baseband unit reconstructs the channel based on the compressed signal and the coefficients. In this way, the amount of information conveyed across the RU-BBU interface is reduced, and the accuracy of channel estimation is improved. Further, the sounding reference signal (SRS) channel can be obtained at the BBU with reduced number of SRS transmissions.

Abstract: The present invention addresses a method, apparatus and computer program product for enabling enhanced repetition transmission for downlink control signal to improve machine type communication coverage. One or a plurality of downlink control channel signaling window lengths is/are predefined, a start position of a window in which repetition of download control signal is allowed is determined based on the determined control channel signaling window length for each window length, and transmission of repetition of download control signal is caused at the determined start position in the respective obtained window length.

Abstract: There are provided measures for uplink configuration and transmission control in inter-site carrier aggregation. Such measures may exemplarily comprise measures for controlling configuration of a terminal device for an inter-site carrier aggregation mode, in which carriers from a macro cell and a micro cell are aggregated for uplink communication, with a configuration of uplink control information for the macro cell located at a first site and a configuration of uplink control information for the micro cell located at a second site, and/or measures for controlling transmission of a terminal device in the inter-site carrier aggregation mode with a handling of concurrent uplink transmissions at the terminal device.

Abstract: The present invention provides a method, apparatus and a computer program product for feedback design of hierarchical coordinated multipoint transmission. The present invention includes obtaining, at a user equipment, a list including a predetermined number of cells, identifying, at the user equipment, a cooperation set of cells including the cell serving the user equipment, determining, at the user equipment, for each cell included in the list whether the cell belongs to the identified cooperation set of the user equipment, and if the cell belongs to the cooperation set of the user equipment, reporting a first predetermined set of parameters, and if the cell does not belong to the cooperation set of the user equipment, reporting a second predetermined set of parameters.

Abstract: A method and apparatus are provided for providing improved spectrum efficiency by triggering a ranked transmission. In this regard, a method is provided that includes causing a configuration message to be transmitted to a mobile terminal, wherein the configuration message provides interpretation information for a frequency hopping flag bit. The method also includes determining a rank for a transmission. The method may include setting a rank indication in the frequency hopping flag bit of a downlink control message based on the determined rank of the transmission.

Abstract: An apparatus and a method are provided. The provided solution includes a controller configured to determine a transmission mode for user equipment, the transmission mode including non-codebook precoding with fixed precoding granularity; and to control a transceiver to transmit information on the selected transmission mode to the user equipment.

Abstract: The present invention addresses a method, apparatus and computer program product for enabling enhanced repetition transmission for downlink control signal to improve machine type communication coverage. One or a plurality of downlink control channel signaling window lengths is/are predefined, a start position of a window in which repetition of download control signal is allowed is determined based on the determined control channel signaling window length for each window length, and transmission of repetition of download control signal is caused at the determined start position in the respective obtained window length.

Abstract: A user equipment UE determines at least one first set SI of physical resource blocks PRBs, and detects downlink signaling within search spaces of set(s) SI. Through that downlink signaling the UE obtains a configuration for a downlink control channel, and that configuration indicates at least one second set S2 of PRBs and at least one search space specific for the UE which lies within S2. The UE utilizes the obtained configuration to monitor at least some of the search spaces of SI and the at least one search space specific for the UE of S2 for further downlink control signaling. Multiple implementations are detailed for how the UE gets SI. This invention is particularly useful for a configurable ePDCCH region in a stand-alone carrier where the UE is not able to get the new configuration from some other carrier such as a PCell whose configuration does not change.

Abstract: There are provided measures for uplink configuration and transmission control in inter-site carrier aggregation. Such measures may exemplarily comprise measures for controlling configuration of a terminal device for an inter-site carrier aggregation mode, in which carriers from a macro cell and a micro cell are aggregated for uplink communication, with a configuration of uplink control information for the macro cell located at a first site and a configuration of uplink control information for the micro cell located at a second site, and/or measures for controlling transmission of a terminal device in the inter-site carrier aggregation mode with a handling of concurrent uplink transmissions at the terminal device.

Abstract: A method is provided that includes allocating a first subset of resource elements (REs) of a physical resource block (PRB) to a mobile terminal and associating one or more first demodulation reference symbols (DM-RS) ports therewith. The first subset of REs and the one or more first DM-RS ports have common interference characteristics, thereby providing for enhanced interference suppression. The method also includes causing transmission of the PRB for reception by the mobile terminal. Corresponding apparatus and computer program products are also provided.

Abstract: An apparatus and method for selecting a beam group and a subset of beams in a communication system are disclosed. The method includes: measuring channel state information (CSI) on a downlink from a base station (920); identifying a selected beam group out of a set of beam groups according to a wideband property of the CSI (930); identifying a selected subset of beams in the selected beam group according to at least one subband (940). Wherein the characteristic of the set of beam groups depends on a transmission rank and the number of beams in the selected subset of beams is equal to the transmission rank. The method further includes: generating encoded feedback information identifying the selected beam group and the selected subset of beams for each subband in a double codebook format (950), transmitting the encoded feedback information to the base station.

Abstract: A user equipment UE is configured with an integer value N which defines an effective data rate. The network sends to the UE a grant for uplink transmissions that comprises a resource indication field that allocates N channels each having a same predetermined uplink format and payload capacity. The UE sends N bit sequences on the respective N channels, each bit sequence comprising data and the same predetermined uplink format. In various embodiments: the network specifically configures the UE to receive the predetermined format of the grant; the grant may have an indicator whether the channels are for new data and for the MCS to use; the N channels may be in a same or in adjacent sub frames regardless of the value of N; and there is one MAC header for all the N channels which the network reads as a single MAC PDU.

Abstract: Methods, apparatus and computer program products provide channel state information (CS1) measurement and reporting for a segment carrier in certain situations. An apparatus such as a base station may determine whether CSI is needed for a channel of a segment carrier comprising a segment portion and a contiguous bandwidth extension of a backward compatible carrier utilized by a base station for wireless communications with a mobile terminal. In response to determining that CSI is needed, the apparatus configures the mobile terminal to communicate channel state information from the mobile terminal to the base station. In other embodiments, an apparatus such as a mobile terminal is configured to receive configuration data indicating whether CSI is to be measured by the mobile terminal, and measuring the CSI and communicating the CSI to the base station in response to the configuration data.

Abstract: A method and apparatus are provided for providing improved spectrum efficiency by triggering a ranked transmission. In this regard, a method is provided that includes causing a configuration message to be transmitted to a mobile terminal, wherein the configuration message provides interpretation information for a frequency hopping flag bit. The method also includes determining a rank for a transmission. The method may include setting a rank indication in the frequency hopping flag bit of a downlink control message based on the determined rank of the transmission.

Abstract: A first precoding matrix W1 is selected from a first codebook comprising sets of rank specific precoding matrices. The first codebook is characterized by there being fewer precoding matrices associated with higher ranks than associated with lower ranks, and characterized by precoding matrices associated with ranks above a certain rank all being diagonal matrices. The selected first precoding matrix W1 is used to select a rank-specific second precoding matrix W2 from a second codebook, such that the selected first and second precoding matrices form a joint precoder specific to a desired rank. The second codebook is characterized by differently sized precoding matrices associated with each of N total ranks, in which N is an integer greater than one. Information on the joint precoder is reported to a network node over an uplink transmission channel.

Abstract: The present invention provides a method, apparatus and a computer program product for feedback design of hierarchical coordinated multipoint transmission. The present invention includes obtaining, at a user equipment, a list including a predetermined number of cells, identifying, at the user equipment, a cooperation set of cells including the cell serving the user equipment, determining, at the user equipment, for each cell included in the list whether the cell belongs to the identified cooperation set of the user equipment, and if the cell belongs to the cooperation set of the user equipment, reporting a first predetermined set of parameters, and if the cell does not belong to the cooperation set of the user equipment, reporting a second predetermined set of parameters.

Abstract: Embodiments include a method for physical layer transmission in a network equipment including receiving, from a higher layer, messages to be transmitted during a subframe on one or more control channels. The number of elements required (i.e. aggregation level) for each control channel is determined. A plurality of physical resource blocks (PRBs) for transmitting the control channels and partitioning the PRBs into clusters is allocated. The interleaving depth (IDP) for each cluster is determined. Each element is mapped to a cluster according to the IDP for that cluster. A transmission signal including the clusters is generated.

Abstract: Embodiments include a method for physical layer transmission in a network equipment including receiving, from a higher layer, messages to be transmitted during a subframe on one or more control channels. The number of elements required (i.e. aggregation level) for each control channel is determined. A plurality of physical resource blocks (PRBs) for transmitting the control channels and partitioning the PRBs into clusters is allocated. The interleaving depth (IDP) for each cluster is determined. Each element is mapped to a cluster according to the IDP for that cluster. A transmission signal including the clusters is generated.

Abstract: An apparatus and method for selecting a beam group and a subset of beams in a communication system are disclosed. The method includes: measuring channel state information (CSI) on a downlink from a base station (920); identifying a selected beam group out of a set of beam groups according to a wideband property of the CSI (930); identifying a selected subset of beams in the selected beam group according to at least one subband (940). Wherein the characteristic of the set of beam groups depends on a transmission rank and the number of beams in the selected subset of beams is equal to the transmission rank. The method further includes: generating encoded feedback information identifying the selected beam group and the selected subset of beams for each subband in a double codebook format (950), transmitting the encoded feedback information to the base station.