173 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.

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.

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.

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.

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.

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.

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.

Provided in the present application are a channel state information (CSI) feedback method, a communication apparatus, a storage medium, and a program product. The method comprises: before performing compression processing on CSI, performing standardization processing on the CSI. That is, the CSI is converted into CSI in a target format. In this way, for CSI of different types of channels, characteristics or formats of the CSI may be different, but after standardization processing is performed on the SCI, CSI in a unified format can be obtained. Alternatively, a module for standardization processing can be added before a CSI compression and recovery network, so as to facilitate compression processing on the CSI of different types of channels, thereby facilitating an improvement in the compression efficiency of the CSI and in the generalization performance of the CSI compression and recovery network.

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.

Methods, apparatus and systems for digital communication are described. A method of wireless communication includes determining, by a first communication device, a codebook set comprising codewords for providing a feedback to a second communication device, and transmitting the feedback, by the first communication device, in a feedback transmission using a codeword from the codebook set.

The embodiment of the invention discloses a model initialization method and device. The method comprises: a first communication device receiving first information sent by a second communication device, the first information comprising model information of a first model configured by the second communication device, the first model being a model for channel state information (CSI) feedback; determining second information based on the first information, the second information being model deployment information of a first model to be deployed in the second communication device; and sending the second information to the second communication equipment, so that the second communication equipment performs model deployment based on the second information. By implementing the embodiment of the invention, the model initialization between the communication devices can be realized, so that the normal work of the model for CSI feedback can be ensured, and the accuracy of a CSI feedback scheme based on artificial intelligence can be ensured.

Apparatus, methods, and systems for channel state information reporting are disclosed. One method (1000) includes receiving (1002) channel state information reporting configuration information, wherein the channel state information reporting configuration information includes: information indicating one or more channel state information reference signal resource configurations associated with a channel state information reference signal resource set for channel measurement and a channel state information interference management resource set for interference measurement; and information indicating the use of channel state information feedback corresponding to multiple points. The method (1000) includes generating (1004) a channel state information report set based on the channel state information reporting configuration information. Each channel state information report in the channel state information report set includes two parts. The method (1000) includes reporting (1006) the channel state information report set to a network.

The present disclosure may include receiving, by a terminal in a wireless communication system, at least one reference signal from a base station, generating channel status information after channel measurement based on the at least one reference signal, and giving feedback on the generated channel status information to the base station, wherein the at least one reference signal may be a reference signal that is transmitted from the base station to the terminal through a reconfigurable intelligent surface (RIS), and first beamforming transmitted from the base station to the RIS may be determined based on the feedback.

In a wireless network, a user equipment (UE) determines, for a channel between each such TRP and the UE, a set of channel characteristics (H TRP). The UE then determines a set of pre-coder (W TRP) recommendations for each such channel based on a corresponding H TRP. The UE selectively decomposes the W TRPrecommendations in both a spatial domain (SD) and a frequency domain (FD) into SD coefficients and FD coefficients based on one or more SD bases and one or more FD bases. Then the UE transmits the spatial domain coefficients and frequency domain coefficients to the network / base station.

The present application relates to a downlink channel state information (CSI) feedback method and a device. The method comprises: a terminal device receiving codebook configuration information and CSI feedback type information sent by a network device; on the basis of the codebook configuration information, determining a codebook type for CSI reporting, and, on the basis of the CSI feedback type information, determining a CSI feedback type for CSI reporting; and performing CSI reporting on the basis of the codebook type for CSI reporting and the CSI feedback type for CSI reporting, wherein the codebook configuration information is used to indicate a codebook type from a codebook type set, and the CSI feedback type information is used to indicate at least one CSI feedback type from a CSI feedback type set.

A wireless communication employing Channel State Information (CSI) feedback is disclosed. A method of operating a transmitting device (such as an access point) providing wireless communication includes: receiving feedback of channel response information from an external communication device; generating a beamforming matrix based on the channel response information; generating a power allocation matrix based on the average SNR of each of a plurality of streams included in the channel response information; and performing beamforming on the external communication device based on the generated power allocation matrix and the generated beamforming matrix. The channel response information is compressed beamforming feedback of multiple-input multiple-output single-user beamforming. A first power allocated to a first stream among the plurality of streams with a first value of average SNR is greater than a second power allocated to a second stream with a second value of average SNR, the second value being greater than the first value.

Disclosed herein is a method performed by a first access point (AP) to perform an overlapping basic service set (OBSS) channel sounding procedure. The method includes transmitting a null data packet announcement (NDPA) frame to cause a second AP operating a second BSS to transmit a null data packet (NDP) frame, determining a transmission scheme that a station (STA) that is associated with the first AP is to use for transmitting a channel state information feedback frame based on information included in the NDP frame transmitted by the second AP, and transmitting a trigger frame to the STA to cause the STA to transmit the channel state information feedback frame, wherein the trigger frame includes an indication of the transmission scheme that the STA is to use for transmitting the channel state information feedback frame.