Abstract: A technique for transmitting discovery-related signals from a transmission point to a UE is disclosed, wherein the transmission point (TP) is adapted to transmit at least two distinct discovery-related signals to be received by the UE. A method aspect (in the TP) comprises transmitting the first discovery-related signal by applying a first beamforming, and transmitting the second discovery-related signal by applying a second beamforming, wherein the steps of transmitting are performed simultaneously in a time domain and/or a space domain, and wherein the first and second beamforming are different. A further method aspect (in the UE) comprises detecting, in the received discovery-related signalling, at least one discovery-related signal in at least the first beam and/or the second beam from the transmission point based on a received distinction between discovery-related signals on the first beam or the second beam, wherein the first beam is different from the second beam.

Abstract: A system and method for providing an eNodeB with the flexibility to configure a Channel State Information (CSI) report to match a specific Coordinated Multipoint (CoMP) transmission hypothesis, which is a candidate for a downlink transmission to a User Equipment (UE) is disclosed. A UE receives, from the eNodeB, a configuration message that specifies a CSI report. The CSI report is specified by a particular interference hypothesis and a particular desired signal hypothesis corresponding to data transmission over at least one effective channel characterized by a specific reference signal. The UE estimates interference according to the interference hypothesis, and/or estimates at least one effective channel by performing measurements on the specific reference signal, and determines a CSI report based on the interference estimation and on the estimated effective channel. The UE also transmits the CSI report to the eNodeB.

Abstract: A coordinated multipoint, CoMP, controller (108) coordinates transmission from a CoMP cluster (102) to a wireless communication device (114). The CoMP controller (108) determines from among multiple different coordination hypotheses for how to coordinate transmissions from the CoMP cluster (102) to the wireless communication device (114), a coordination hypothesis to apply. The CoMP controller (108) applies the determined coordination hypothesis (122) to transmissions from the CoMP cluster (102) on channel state information, CSI, radio resources on which the wireless communication device (114) is to perform CSI measurements. Notably, though, the CoMP controller (108) defers applying the determined coordination hypothesis to transmissions from the CoMP cluster (102) on user data radio resources, until after the determined coordination hypothesis is applied to the transmissions on the CSI radio resources.

Abstract: A method and a device for sending parameters of a precoder in a wireless communication system are disclosed. According to one aspect, the method comprises: sending, to a network node, an indication of a subset of beams selected from a plurality of orthogonal beams and an indication of power levels of the selected subset of beams, for a first frequency granularity; and sending, to the network node, an indication of phases of the selected subset of beams, for a second frequency granularity, wherein the indication of the selected beams, the indication of the power levels of the selected subset of beams and the indication of the phases of the selected subset of beams are part of the parameters of the precoder.

Abstract: A method and a device for determining parameters of a precoder in a wireless communication system are disclosed. According to one aspect, a method includes selecting a subset of beams corresponding to a plurality of orthogonal beams; obtaining power levels of the selected subset of beams for generating a first factor of the precoder and obtaining phases of the selected subset of beams for generating a second factor, wherein the first factor and the second factor are part of the parameters of the precoder.

Abstract: A method and a device for sending parameters of a precoder in a wireless communication system are disclosed. According to one aspect, the method comprises: sending, to a network node, an indication of a subset of beams selected from a plurality of orthogonal beams and an indication of power levels of the selected subset of beams, for a first frequency granularity; and sending, to the network node, an indication of phases of the selected subset of beams, for a second frequency granularity, wherein the indication of the selected beams, the indication of the power levels of the selected subset of beams and the indication of the phases of the selected subset of beams are part of the parameters of the precoder.

Abstract: A method implemented in a user equipment (UE) includes receiving a first reference signal (RS) from a first transmit antenna port and performing channel estimation based on the first RS. The method also includes obtaining an indication that the first RS and a second RS share a spatial property and receiving the second RS from a second transmit antenna port. The method further includes inferring the shared spatial property for the second RS based on the indication and performing channel estimation based on the second RS using the inferred spatial property.

Abstract: A radio node in a wireless communication system employs multiple different candidate formats that define different possible positions of decoding checks within a transport block of a specific size. The radio node determines, from these different candidate formats, a format that defines a position of decoding checks within a transport block to be encoded or decoded. The radio node then encodes or decodes at least a portion of the transport block based on the determined format.

Abstract: A method at a wireless device for determining parameters of a precoder to a network node, in a wireless communication system, is provided. The method comprises: selecting a subset of beams from a plurality of orthogonal beams, the selected subset of beams having phases; quantizing the phases of the selected subset of beams, the quantization being beam dependent; and sending the selected subset of beams and the quantized phases to the network node, wherein the selected subset of beams and the quantized phases are part of the parameters of the precoder. A wireless device for carrying out this method is also provided.

Abstract: A radio node (52) in a wireless communication system (10) employs multiple different candidate formats (22) that define different possible positions of decoding checks (24) within a transport block of a specific size. The radio node (52) determines, from these different candidate formats (22), a format that defines a position of decoding checks (24) within a transport block (16) to be encoded or decoded. The radio node (52) then encodes or decodes at least a portion of the transport block (16) based on the determined format.

Abstract: Systems and method of reducing interference in a wireless communication system are provided. In one exemplary embodiment, a method by a wireless device (105, 200, 300a, 300b, 500, 1105, 1205, 1207) comprises determining (409, 909) an uplink precoder (107) based on channel measurements on first and second downlink reference signal resources. Further, the precoder enables a transmission (113) on an uplink reference signal resource that is precoded with the uplink precoder and that is quasi co-located (QCL) (121) with a transmission (111) on the first downlink reference signal resource but not QCL (123) with a transmission (115) on the second downlink reference signal resource.

Abstract: A method for indicating parameters of a precoder from a wireless device to a network node in a wireless communication system is provided. The method comprises: determining at least one rotation factors associated with a plurality of orthogonal beams; selecting a subset of beams from the plurality of orthogonal beams; and sending, to the network node, the selected subset of beams and the at least one rotation factors, wherein the selected subset of beams and the at least one rotation factors are part of the parameters of the precoder. A wireless device for carrying out this method is also provided.

Abstract: A method of operating a UE includes obtaining an interference measurement (IM) resource, performing an interference measurement using the IM resource, obtaining a time reference associated with the interference measurement, determining that the interference measurement represents a non-typical level of interference, and transmitting an indicator indicating the time reference to a network node. Related nodes, devices and computer program products are disclosed.

Abstract: A system and method for providing an eNodeB with the flexibility to configure a Channel State Information (CSI) report to match a specific Coordinated Multipoint (CoMP) transmission hypothesis, which is a candidate for a downlink transmission to a User Equipment (UE) is disclosed. A UE receives, from the eNodeB, a configuration message that specifies a CSI report. The CSI report is specified by a particular interference hypothesis and a particular desired signal hypothesis corresponding to data transmission over at least one effective channel characterized by a specific reference signal. The UE estimates interference according to the interference hypothesis, and/or estimates at least one effective channel by performing measurements on the specific reference signal, and determines a CSI report based on the interference estimation and on the estimated effective channel. The UE also transmits the CSI report to the eNodeB.

Abstract: A method and a device for sending parameters of a precoder in a wireless communication system are disclosed. According to one aspect, the method comprises: sending, to a network node, an indication of a subset of beams selected from a plurality of orthogonal beams and an indication of power levels of the selected subset of beams, for a first frequency granularity; and sending, to the network node, an indication of phases of the selected subset of beams, for a second frequency granularity, wherein the indication of the selected beams, the indication of the power levels of the selected subset of beams and the indication of the phases of the selected subset of beams are part of the parameters of the precoder.

Abstract: Some embodiments provide a method in a wireless device for reporting channel state information, CSI, for a CSI process. The CSI process corresponds to a reference signal resource and an interference measurement resource. According to the method, the wireless device obtains an adjustment value associated with the CSI process. The wireless device estimates an effective channel based on one or more reference signals received in the reference signal resource, and applies the adjustment value to the estimated effective channel, thereby obtaining an adjusted effective channel. Furthermore, the wireless device determines channel state information based on the adjusted effective channel, and on interference estimated based on the interference measurement resource. Finally, the channel state information is transmitted to a network node.

Abstract: A method and a device for determining parameters of a precoder in a wireless communication system are disclosed. According to one aspect, a method includes selecting a subset of beams corresponding to a plurality of orthogonal beams; obtaining power levels of the selected subset of beams for generating a first factor of the precoder and obtaining phases of the selected subset of beams for generating a second factor, wherein the first factor and the second factor are part of the parameters of the precoder.

Abstract: A system and method for providing an eNodeB with the flexibility to configure a Channel State Information (CSI) report to match a specific Coordinated Multipoint (CoMP) transmission hypothesis, which is a candidate for a downlink transmission to a User Equipment (UE) is disclosed. A UE receives, from the eNodeB, a configuration message that specifies a CSI report. The CSI report is specified by a particular interference hypothesis and a particular desired signal hypothesis corresponding to data transmission over at least one effective channel characterized by a specific reference signal. The UE estimates interference according to the interference hypothesis, and/or estimates at least one effective channel by performing measurements on the specific reference signal, and determines a CSI report based on the interference estimation and on the estimated effective channel. The UE also transmits the CSI report to the eNodeB.

Abstract: Some embodiments provide a method in a wireless device for reporting channel state information, CSI, for a CSI process. The CSI process corresponds to a reference signal resource and an interference measurement resource. According to the method, the wireless device obtains an adjustment value associated with the CSI process. The wireless device estimates an effective channel based on one or more reference signals received in the reference signal resource, and applies the adjustment value to the estimated effective channel, thereby obtaining an adjusted effective channel. Furthermore, the wireless device determines channel state information based on the adjusted effective channel, and on interference estimated based on the interference measurement resource. Finally, the channel state information is transmitted to a network node.

Abstract: A transmitting radio node precodes a transmission from an antenna array to a receiving radio node. The array includes co-polarized antenna elements aligned in a given spatial dimension of the array. The transmitting radio node precodes the transmission from different subarrays of the antenna elements using respective coarse-granularity precoders that are factorizable from a multi-granular precoder targeting the given spatial dimension of the array at different granularities, so as to virtualize the subarrays as different auxiliary elements. The transmitting radio node also precodes the transmission from the different auxiliary elements using one or more finer-granularity precoders that are also factorizable from the multi-granular precoder. In this case, the coarse granularity precoders and the one or more finer-granularity precoders are represented within one or more codebooks used for said preceding.