276 results about "Channel state information feedback" patented technology

A communication device for providing a channel state information, CSI, feedback in a wireless communication system includes a transceiver to receive, from a transmitter a radio signal via a time-variant, frequency-selective MIMO channel, the radio signal including downlink reference signals according to a reference signal configuration including a number of antenna ports, and downlink signals including the reference signal configuration; and a processor. The processor estimates an explicit CSI in the frequency domain using measurements on the downlink reference signals on the radio channel, selects a Doppler-delay precoder matrix (W) for a composite Doppler-delay-beam three-stage precoder, calculates either one or more of a channel quality indicator, CQI, and / or a precoder matrix indicator, PMI, and / or a rank indicator, RI, and reports to the transmitter the CSI feedback including either one or more of the CQI, and / or the PMI and / or the RI.

The invention relates to a low-complexity multi-user hybrid precoding method and system and a storage medium, and belongs to the technical field of wireless communication. According to the method, a hybrid precoding system model is established based on a millimeter wave broadband multi-user communication scene, a steering vector is constructed through channel state information feedback or direction of arrival estimation, an analog precoding matrix is initialized, an equivalent channel is further constructed in combination with channel feedback information, singular value decomposition is carried out, and a digital precoding matrix is generated. And the precoding structures of the receiving end and the transmitting end are iteratively optimized under the constant modulus constraint. The system comprises a modeling module, a steering vector initialization module, a digital pre-coding module and a pre-coding optimization module, and all the modules work cooperatively to realize low-complexity pre-coding design. According to the method, the precoding calculation complexity in a multi-user broadband system is effectively reduced, the stability of precoding design and the spectrum utilization efficiency are improved, and the method has good robustness and engineering realizability and is suitable for a next-generation wireless communication system.

Apparatus and methods are provided for TRP mapping configuration when a user equipment (UE) communicates with a plurality of transmission and reception points (TRPs). For multiple TRP (multi-TRP) coherent joint transmission (CJT) channel state information (CSI) reporting, a channel measurement resource (CMR) configuration may use CSI-RS port splitting, CSI-RS resource set splitting, or multiple CSI-RS resource sets.

Joint denoising and compression of channel state information (CSI) feedback may be performed. An example device may include a processor configured to perform one or more actions. The device may receive configuration information that indicates a latent mode of operation and an encoder model. The device may receive CSI reference signals from a network node. The device may generate an estimated channel matrix based on the CSI reference signals. The device may generate a latent representation of the estimated channel matrix based on the latent mode of operation and the encoder model. The device may send the latent representation of the estimated channel matrix to the network node.

Method performed by a UE for providing a channel state information (CSI) feedback in a wireless communication system including at least the UE and a gNB or a radio network node. The UE is operative to: estimate the MIMO channel between the gNB and the UE based on received DL reference signals for the configured resource blocks. The UE is further operative to calculate, based on a performance metric, a precoder matrix, for a number of antenna ports of the gNB and configured subbands, the precoder matrix being based on two codebooks and a set of combination coefficients for complex scaling / combining one or more of vectors selected from a first codebook and a second codebook, and the UE is operative to report a CSI feedback and / or a PMI and / or a PMI / RI, to the gNB, used to indicate the precoder matrix for the configured antenna ports and resource blocks.

The invention provides a channel state information feedback enhancement method and system based on bidirectional channel correlation, and the method is executed at a base station end, and comprises the steps: receiving a downlink channel state information semantic vector which is coded, compressed and quantized by a user end through a deep joint source channel; carrying out inverse quantization on the semantic vector to obtain an intermediate semantic vector; based on the intermediate semantic vector, retrieving a related historical uplink semantic vector from an uplink channel semantic knowledge base; performing fusion enhancement on the intermediate semantic vector and the retrieval result through an attention mechanism to generate an enhanced semantic vector; inputting the enhanced semantic vector into a decoder, and outputting a reconstructed downlink channel state information matrix; wherein the encoder, the enhancement module and the decoder perform end-to-end joint training optimization by minimizing a reconstruction error. According to the method, the semantics is enhanced at the receiving end by utilizing the correlation of the uplink and downlink channels, the feedback precision and the system robustness are remarkably improved, and the method is suitable for a frequency division duplex system.

Logic may determine a precoder matrix indicator (PMI). Logic may pre-process the channel matrix to generate an input matrix for an encoder neural network (NN). Logic may infer a set of PMI bits with an encoder NN based on an input matrix. Logic may cause a set of PMI bits to be transmitted in a channel state information (CSI) report via an interface. Logic may decode a communication including a CSI report from another station, a set of PMI bits generated via an encoder NN and received via an interface. Logic may parse the set of PMI bits from the CSI report. And logic may infer, via the decoder NN, a precoding matrix based on the set of PMI bits.

The invention discloses a near-field channel state information feedback method under a super-large scale array based on Transform, which comprises the following steps: in a downlink XL-MIMO system in a near-field area, a user side performs two-dimensional matrix processing on acquired CSI data and transmits the processed CSI data to a coding end; two-channel coding compression is carried out on the CSI matrix, a first channel uses an encoder to extract channel related characteristics, and a second channel enables an original CSI matrix to pass through a linear network so as to reserve original information; compressing the output of the two channels, and splicing to generate a low-dimensional code word to be fed back; the base station side decoding end splits the low-dimensional code word and decompresses the low-dimensional code word of the corresponding channel; decompressed dual-channel code words are respectively input to two ends of a decoder; and carrying out size change on the output of the decoder to obtain the estimated original CSI. According to the method, angle and distance information of a near-field channel is fully utilized, and efficient CSI compression and high-precision reconstruction are realized.

Methods and apparatus are provided machine learning (ML) based channel state information (CSI) feedback from a user equipment (UE) to a wireless network. For a neural network (NN) model type and an approach for deriving CSI for multiple rank CSI feedback, the UE reports one or more feedback size in a UE capability message to the wireless network. For the NN model type and the approach, the UE processes a configuration from the wireless network of a plurality of NN models associated with the one or more feedback size. The UE processes an overhead allocation for the one or more feedback size and generates the multiple rank CSI feedback using different NN models of the plurality of NN models, per spatial layer or spatial layer group or rank, based on the overhead allocation.

A wireless transmit / receive unit (WTRU) and a network (NW) may perform end-to-end training of an artificial intelligence (AI) or machine learning (ML) model for channel state information (CSI) feedback. The NW may generate training data for the training using a set of one or more seed values. The WTRU may be aware of the seed values and may use them to generate ground truth data, which can be used to determine the value of an end-to-end error and / or loss function. The WTRU and the NW may compute or approximate derivatives of the loss function and may send one another the derivatives. The WTRU and the NW may utilize the derivatives to update one or more AI or ML models.

Systems and methods for reliable Channel State Information (CSI) feedback towards multiple Transmission / Reception Points (TRPs) are provided. In some embodiments, a wireless device receives a configuration for one or more of: Semi-Persistent CSI (SP-CSI) reporting on PUCCH comprising a first PUCCH resource; SP-CSI reporting on PUSCH comprising a reporting periodicity and slot offset; and periodic CSI reporting on PUCCH comprising a second PUCCH resource activated with a third and a fourth spatial relations or uplink TCI states, and a reporting periodicity and slot offset. The wireless device also receives an appropriate activation command and transmits SP-CSI in a PUCCH resource; a periodic CSI in a PUCCH resource; and / or a SP-CSI in a PUSCH resource. In this way, reliability of SP-CSI on PUSCH, or SP-CSI on PUCCH, or periodic CSI on PUCCH can be improved by repeating the SP-CSI or periodic CSI over multiple TRPs.

A system, method and apparatus for wireless communications is provided. A user equipment (UE) receives one or more messages. The one or more messages include first configuration parameters for channel state information, reference signal (CSI-RS) measurement and CSI report in a first radio resource control (RRC) state. The one or more messages also include second configuration parameters for the CSI-RS measurement and the CSI report in a second RRC state. The UE transmits a first CSI report, based on the first configuration parameters, when the UE is in the first RRC state. The UE transmits a second CSI report, based on the second configuration parameters, when the UE is in the second RRC state.

A method of a terminal may comprise: receiving a channel state information (CSI)-reference signal (RS) from a base station; estimating source CSI between the base station and the terminal based on the CSI-RS; inputting the source CSI into an artificial intelligence (AI) / machine learning (ML) model included in the terminal to acquire original CSI of the source CSI; and performing a feedback procedure for the original CSI using an interoperable CSI feedback method between the base station and the terminal.

Methods (450, 550) and devices (110, 120) in a wireless communication system (100) enable interference mitigation using a channel state information (CSI) report including CSIs for each of one or more power configurations. A user equipment (110) receives (454) a CSI report configuration that specifies CSI reference signal resources for channel measurement, a codebook, and one or more power configurations. The power configuration indicates power level (s) for one or more groups of beams. Upon receiving (458) CSI reference signals on the configured CSI reference signal resources, the UE generates and transmits (460) a CSI report including CSI for each of the power configurations.

The invention relates to a digital semantic communication method combining learnable constellation mapping and channel adaptation, and belongs to the technical field of communication. According to the method, a semantic coding modulator is constructed, and the transition probability from an information source to a discrete constellation symbol is systematically learned, so that the problem that digital modulation cannot be differentiated is solved; a semantic coding process is dynamically adjusted based on a channel state information feedback mechanism of double attention, and an efficient matching relationship between semantic features and subcarriers is ensured. A neural network is designed to combine a multipath channel which cannot be trained but can be differentiated with an OFDM signal processing module, and end-to-end cross-layer joint optimization of the system is realized.

Channel state information (CSI) feedback in a wireless communication system is disclosed. User equipment transmits a CSI feedback signal via a Physical Uplink Control CHannel (PUCCH). If the UE is configured in a first feedback mode, the CSI comprises a first report jointly coding a Rank Indicator (RI) and a first precoding matrix indicator (PMI1), and a second report coding Channel Quality Indicator (CQI) and a second precoding matrix indicator (PMI2). If the UE is configured in a second feedback mode, the CSI comprises a first report coding RI, and a second report coding CQI, PMI1 and PMI2. The jointly coded RI and PMI1 employs codebook sub-sampling, and the jointly coding PMI1, PMI2 and CQI employs codebook sub-sampling.

The invention discloses an uplink and downlink combined wireless communication method and system based on channel semantic feature feedback. The method constructs an uplink and downlink closed-loop semantic communication architecture: a terminal side obtains a downlink channel matrix, generates a channel semantic feature vector through a channel semantic feature extraction network, inputs the channel semantic feature vector into a compression coding network to obtain a low-dimensional feedback code word, and sends the low-dimensional feedback code word to a base station side through an uplink limited feedback link; the base station side decodes and restores the low-dimensional feedback code word to obtain a reconstructed channel semantic feature vector, inputs the reconstructed channel semantic feature vector as prior information into a channel sensing sequence coding and modulation network, and generates a complex modulation signal under the condition of meeting the transmission power constraint; and the terminal side is combined with local channel information, and original data is recovered through a channel sensing demodulation network. Through joint optimization of the channel semantic feedback and the transceiver end-to-end transmission process, the channel state information feedback overhead is reduced under the constraint of limited feedback resources, and the transmission reliability and robustness in a complex channel environment are improved.

The disclosure relates to a 5th generation (5G) or 6th generation (6G) communication system for supporting higher data transmission rates. A method is provided. The method includes compressing, by the base station, channel information about a primary cell on the basis of channel status information (CSI) feedback received from a terminal, performing, by the base station, CSI recovery on compressed channel information about the secondary cell on the basis of the compressed channel information, performing, by the base station, the CSI recovery, and then acquiring predicted CSI of each of the primary cell and the secondary cell, generating, by the base station, a beamforming weight for the primary cell on the basis of the predicted CSI of the primary cell, and generating, by the base station, a beamforming weight for the secondary cell on the basis of the predicted CSI of the secondary cell.

Methods, systems, and devices are described for wireless communications that support transmitting channel state information (CSI) feedback utilizing flexible uplink control resources. A method may include determining a size of a frequency subband corresponding to components of a CSI feedback report based on configuration signaling or a size of allocated uplink control resources. A method may include encoding a CSI report into a single packet and transmitting the single packet over uplink control resources. A method may include encoding a first plurality of components of a CSI report in a first packet, encoding a second plurality of components of the CSI report in a second packet, and mapping the packets to uplink control resources. A method may include transmitting a first plurality of components of a CSI report on a first slot and a second plurality of components of the CSI report on one or more subsequent slots.

Example embodiments of the present disclosure relate to an effective mechanism for processing the CSI reports. In this solution, the terminal device receives, at a terminal device and from a network device, at least one configuration for channel state information (CSI) feedback; and transmits, based on at least one configuration, to the network device, the CSI feedback comprising a plurality of partitions with different omission priorities, the plurality of partitions comprising parameters associated with: a plurality of first vectors, a plurality of second vectors, and a plurality of third vectors. In this way, by associating the parameters with three types of vectors, the TD / DD information may be reported together with the SD information and FD information.

Example embodiments of the present disclosure relate to an effective mechanism for processing the CSI reports. In this solution, the terminal device receives, from a network device, at least one configuration for channel state information (CSI) feedback; and transmitting, based on the at least one configuration, the CSI feedback to the network device, the CSI feedback comprising a plurality of partitions with different omission priorities, the plurality of partitions comprising parameters associated with one or more of a plurality of CSI-reference signal (RS) allocations. In this way, the priority rule for reporting the parameters may be updated to adaptable for the scenario where a multi-TRP is supported.

Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may receive a configuration associated with artificial intelligence or machine learning (AI / ML) model based channel state feedback (CSF) reporting. The UE may transmit, based at least in part on the configuration, a channel state information (CSI) report that indicates joint CSI feedback, wherein the joint CSI feedback includes a first CSI associated with a known mapping and a second CSI associated with a UE-side AI / ML model. Numerous other aspects are described.

A channel state information feedback method and an apparatus are provided, relate to the field of communications technologies, and are used to flexibly feed back channel state information, to implement balance between feedback overheads and feedback precision of the channel state information. The method-includes: includes sending a media access control (MAC) frame, where the MAC frame includes a processing mode bitmap, every n bits in the processing mode bitmap correspond to one feedback unit, and a value of the n bits is used to indicate a processing mode of channel state information of the corresponding feedback unit; and receiving a beamforming report, where the beamforming report includes one or more feedback fields, each feedback field corresponds to one feedback unit, the feedback field includes channel state information of the corresponding feedback unit, and the channel state information included in the feedback field is processed in a processing mode indicated by the processing mode bitmap.

The application discloses a channel state information (CSI) feedback method and device, a terminal and a network side equipment, and belongs to the technical field of communication. The method of the application embodiment comprises the following steps: a terminal determines N channel state information reference signals (CSI-RSs) to be measured; N is an integer greater than 1; the terminal measures the N CSI-RSs to obtain CSI; wherein the CSI comprises a transmission rank, beam indexes corresponding to P CSI-RSs, and a bit map corresponding to the P CSI-RSs, wherein the bit map is used for indicating coefficients of beams of the CSI-RSs which need to be fed back after frequency domain compression; P is an integer less than or equal to N; and the terminal sends the CSI to a network side equipment.

The embodiment of the invention relates to equipment, a method and a device of a codebook mask independent training mode for CSI feedback, and a computer readable storage medium. The method comprises: receiving, from a network device, a training data set associated with channel state information (CSI), a size of a codebook of the network device, and a first set of codeword indexes associated with the codebook, wherein the size of the codebook is associated with the number of vectors in the codebook of the network device; and determining a CSI feedback compression for the network device based on the first plurality of vectors and the second plurality of vectors, the first plurality of vectors and the second plurality of vectors being generated based on the training data set, a size of the codebook, and a first set of codeword indices associated with the codebook.

Embodiments of the present application provide a method and an apparatus for feeding back channel state information. The method includes: a terminal equipment receives a reporting configuration from a network device, wherein the reporting configuration includes codebook indication information and feedback configuration information; measuring a channel state information reference signal to obtain channel state information; processing the channel state information according to the codebook indication information and the feedback configuration information to obtain a first channel state information; and feeding back the first channel state information to the network device.

Devices, methods, and systems for transmitting sidelink control information indicating no sidelink data are disclosed. A method (400) includes determining (402), at a user equipment, that no sidelink data is available for a destination. The method (400) includes transmitting (404) sidelink control information to the destination indicating that no sidelink data is available for the destination and triggering a channel state information feedback response from the destination. The method (400) includes monitoring (406) reception of the channel state information feedback response from the destination.

Apparatuses, systems, and methods for Al based CSI (Channel State Information) feedback with CSI prediction, including systems, methods, and mechanisms for a user equipment device (UE) to determine a measurement window for a CSI prediction and determine a prediction window for a ground truth measurement. The measurement window and prediction window may correspond to a single CSI Reference Signal (RS) resource set. The measurement window and prediction window may correspond to different CSI-RS resource sets. A CSI-RS may be aperiodic.

The invention discloses a remote data monitoring method and system for a PLC, and relates to the technical field of PLCs, and the method comprises the steps: monitoring the communication spectrum efficiency and channel state information feedback delay time of the PLC in real time; performing trend analysis on the spectrum efficiency, and evaluating the stability of control communication; according to the channel state information feedback delay time, whether the channel has a prediction error risk or not is evaluated; constructing a multi-dimensional congestion early warning vector, inputting the multi-dimensional congestion early warning vector to a pre-trained optimization decision model for analysis, and outputting a PLC controller communication strategy; according to a PLC controller communication strategy, self-adaptive optimization of multi-control instruction concurrent communication performance is realized. The method has the advantages that while the industrial-grade signal-to-noise ratio gain is ensured, the remarkable reduction of the communication interruption rate and the optimization of the energy consumption cost are synchronously achieved, and the industrial Internet of Things communication optimization with robustness, timeliness and energy efficiency ratio is constructed.