674 results about "Uplink channel" patented technology

An indication method includes: receiving, by a terminal device, indication information, and the indication information is used for indicating a combination of a number of transmission layers of at least one uplink channel.

A method and an apparatus for uplink transmissions in a wireless communication system are provided. The method includes receiving a downlink signal including at least one of downlink data or downlink control information (DCI); and determining uplink signals to be transmitted based on the downlink signal, and determining at least one of a time unit or an uplink channel for transmitting the uplink signal, wherein the uplink signal includes at least one of uplink data or uplink control information (UCI), and the uplink channel includes at least one of a physical uplink control channel (PUCCH) or a physical uplink shared channel (PUSCH); and performing an uplink transmission based on the determined uplink signals, and the determined time units and / or uplink channels. The invention can improve the efficiency of the uplink transmission.

A method of a base station, includes: receiving, from a reference UE within a coverage of the base station, user equipment (UE) capability information and identifying whether the reference UE is capable of performing full-duplex communication; transmitting, to the reference UE, uplink timing information of an interfering UE, wherein the interfering UE is geographically adjacent to the reference UE; receiving, from the reference UE, a cross-link interference (CLI) measurement report; and transmitting, to the reference UE, information about an uplink channel, based on the CLI measurement report, wherein the uplink channel acts as interference to the reference UE.

The invention provides a channel estimation method of a multi-user uplink low earth orbit satellite wireless communication system, which is used for transmitting signals by adopting an OTFS (Over The Over The Fine Switching) modulation technology aiming at a low earth orbit satellite rapid moving scene, and provides a low-complexity uplink channel estimation method combining path number, time delay, Doppler and channel fading. The method comprises the following steps: firstly, designing different pilot symbol grid positions of multiple users in a time delay-Doppler domain; then, performing energy threshold detection on all time delay domains of low-orbit satellite receiving signals to estimate the total number of paths and the time delay value of each path; then, giving a closed expression of channel fading by using a maximum likelihood estimation method, and estimating Doppler frequency shift by using a one-dimensional search method; through simulation verification, the provided uplink joint channel estimation method can effectively realize channel detection, can be further applied to ergodic capacity derivation work, and has relatively good practicability and performance.

Disclosed is a method for transmitting an uplink (UL) signal or receiving a downlink (DL) signal by a terminal in a wireless communication system. Particularly, the method may comprise: receiving information related to at least one first time interval unavailable for the transmission or reception; and transmitting the UL signal or receiving the DL signal through at least one second time interval other than the at least one first time interval, wherein the transmission of the UL signal and the reception of the DL signal are not performed in the at least one first time interval, and the information related to the at least one first time interval is received through downlink control information (DCI) or a medium access control-control element (MAC-CE).

The invention provides a communication method and a communication device. The terminal device can determine the SRS resource group identifier according to the determined first report configuration, can identify the SRS port number m according to the SRS resource group, and can send the first report, the first report is determined according to the first report configuration, the m SRS ports and the Q ports, Q is greater than m, in this way, the terminal device can send the SRS through the m ports, and the terminal device can send the SRS through the m ports. In the embodiment of the invention, the situation that more time-frequency resources need to be occupied when the Q ports are used for sending the SRS is avoided, and the network equipment can determine the channel information of the Q ports according to the first report and the channel information of the m ports, estimate the uplink channel according to the channel information of the Q ports, and estimate the downlink channel according to the uplink channel, so that the network equipment can send the SRS according to the uplink channel. Therefore, the pre-coding matrix for downlink transmission can be determined according to the estimated downlink channel, and the downlink pre-coding capability can be improved.

First information of a DL assignment for a first PDSCH of a serving cell can be received. A first PUCCH resource and a second PUCCH resource can be identified for HARQ-ACK feedback of the first PDSCH. A starting symbol of the second PUCCH resource can be later than a starting symbol of the first PUCCH resource. Second information of a DL assignment for a second PDSCH of the serving cell can be received. A starting symbol of the second PDSCH can be later than a starting symbol of the first PDSCH. A determination can be made as to whether to delay the HARQ-ACK feedback of the first PDSCH for processing of the second PDSCH. HARQ-ACK information of the first PDSCH can be transmitted on the second PUCCH resource in response to determining to delay the HARQ-ACK feedback of the first PDSCH.

The invention discloses a HARQ-ACK (Hybrid Automatic Repeat reQuest Acknowledgement) information feedback method, receiving method and device, relates to the technical field of communication, and aims to save the bit number of HARQ-ACK information, improve the transmission efficiency of UCI (Uplink Control Information) and save communication resources. The HARQ-ACK information feedback method comprises: a terminal receiving a first DCI through a first PDCCH, the first DCI scheduling M PDSCHs, the format of the first DCI being a DCI format that can be used for scheduling PDSCHs of a plurality of cells; and the terminal sends the HARQ-ACK codebook through the uplink channel, wherein the HARQ-ACK codebook comprises the HARQ-ACK information corresponding to the first PDCCH (Physical Downlink Control Channel). Wherein the bit number of the HARQ-ACK information corresponding to the first PDCCH is determined according to the maximum number of cells in the number of cells corresponding to each row in the first table, and each row in the first table is used for indicating cells scheduled by one-time scheduling of the DCI in the DCI format.

A method and device for determining channel state information (CSI) are provided. The method includes: receiving uplink pilot signals sent by a terminal at T consecutive moments; performing uplink channel estimation on the uplink pilot signals to determine uplink channel information at each moment, wherein T is an integer greater than 1; determining a channel state information reference signal (CSI-RS) beam according to the uplink channel information; sending a beamformed CSI-RS to the terminal according to the CSI-RS beam; and receiving CSI reported by the terminal.

A method for performing an uplink transmission to a base station by a user equipment through an unlicensed cell in a wireless communication system is provided. The method includes: receiving an uplink grant that schedules the uplink transmission in at least one subframe from the base station; and performing the uplink transmission in the at least one subframe using at least one of a first type channel access or a second type channel access. The uplink transmission is performed using the second type channel access when all of the at least one subframe is included in a predetermined interval determined based on a downlink transmission through the unlicensed cell from the base station.

The present application relates to the technical field of communications, and provides a communication method and apparatus, the method comprising: a terminal device receiving indication information, the indication information being used for indicating that SRS transmission on a first symbol in an SRS resource is cancelled; the terminal equipment sends the SRS on at least one second symbol, the at least one second symbol is a symbol in at least one continuous symbol corresponding to a first time period in the SRS resource, the first time period is a time period between a first moment and a second moment, the first moment is a moment when the indication information is analyzed by the terminal equipment, and the second moment is a moment when the indication information is analyzed by the terminal equipment. The second moment is the moment corresponding to the initial position of the first symbol, and the antenna ports for sending the SRS corresponding to the at least one second symbol comprise all antenna ports of the terminal equipment. According to the communication method provided by the embodiment of the invention, the symbols used for sending the SRS in the SRS resources can be selected based on the sequential relationship, so that the accuracy of uplink channel acquisition is improved, and the uplink transmission performance is ensured.

The present application provides an uplink transmission method. In the method, a terminal device receives configuration information of a second cell, wherein the configuration information of the second cell comprises configuration information of a downlink carrier, a normal uplink carrier, and a supplementary uplink carrier of the second cell, and a first signal of the second cell is used for determining time-frequency synchronization of a first cell and determining at least one of the transmission power of an uplink channel of the first cell and radio resource management of the first cell; and then, the terminal device can send uplink information by means of the first cell, wherein the first cell is only used for uplink transmission, and the terminal device can obtain related information of the first cell by means of the first signal of the second cell, so that the terminal device can send the uplink information by means of the first cell to implement uplink communication. Thus, because the first cell is only used for uplink transmission, the number of downlink carriers that the terminal device needs to detect is reduced, thereby reducing the complexity and power consumption of the terminal device.

The invention discloses a transmission method and device, and relates to the technical field of wireless communication. In the method, a network device sends first indication information to a terminal device, the terminal device activates a first uplink channel which is not transmitted in a first cell in a first time period according to the first indication information, and the first uplink channel comprises a first CG PUSCH; the terminal device transmits first uplink information on a first CG PUSCH resource, the first CG PUSCH resource being within the first time period.

Provided are a method and a device for channel state information, terminal, and network side, and a storage medium. The method includes: receiving beamformed CSI-RSs, or the beamformed CSI-RSs and frequency domain basis vector indication information transmitted by a network side by means of antenna ports, where beams used in beamforming are determined based on spatial domain basis vectors or based on the spatial domain basis vectors and frequency domain basis vectors, and the spatial domain basis vectors and the frequency domain basis vectors are determined based on an uplink channel; determining port indication information and a port combination coefficient for data transmission based on the beamformed CSI-RS or the beamformed CSI-RS and the frequency domain basis vector indication information; and feeding back the port indication information and port combination coefficient to the network side for determining precoding of downlink transmission data at the network side.

The present application relates to the technical field of communications, and discloses a channel feedback method and apparatus, a terminal, and a network side device. The channel feedback method of embodiments of the present application comprises: a terminal receives first information from a network side device, the first information being determined on the basis of at least part of second information obtained by means of uplink channel measurement; the terminal executes downlink channel measurement on the basis of the first information, to obtain first channel feedback information; and the terminal sends second channel feedback information to the network side device, the second channel feedback information being determined on the basis of at least part of the first channel feedback information; wherein the second information comprises a first multipath parameter and a mapping relationship between the first multipath parameter and a subarray on the network device side, and the first multipath parameter is a multipath parameter of an uplink channel.

A wireless device receives one or more configuration parameters indicating at least two sounding reference signal (SRS) resources linked for bandwidth aggregation. The at least two SRS resources comprise a first SRS resource of a first component carrier and a second SRS resource of a second component carrier without at least one uplink channel. The wireless device receives downlink control information (DCI) scheduling a transmission, where the transmission is a downlink transmission or an uplink transmission and the transmission overlaps in time with the first and second SRS resources. The wireless device drops SRS transmissions via the at least two SRS resources based on whether a time period between a last symbol of the DCI and a starting symbol of the at least two SRS resources is equal to, or greater than, a number of symbols plus a guard period.

The invention provides a secondary cell activation method, device and system, and the method can be suitable for a secondary cell activation scene. In the method, a terminal device receives a first signaling sent by a network device, the first signaling is used for triggering activation of a secondary cell, and the first signaling carries first indication information through a reserved bit, and the first indication information is used for indicating the terminal device to send a first sounding reference signal to the network device, the first sounding reference signal is used for determining uplink channel state information. And the terminal device determines a transmission resource corresponding to the secondary cell from a pre-configured transmission resource set based on the first indication information, the transmission resource being used for guiding the transmission of the first sounding reference signal. And then, the terminal equipment sends the first sounding reference signal to the network equipment by using the transmission resource. Therefore, according to the method, the first indication information can be carried through the reserved bit in the first signaling, the first signaling does not need to be transformed, and correct analysis of the first signaling is ensured.

A user equipment (UE) is described that includes a higher layer processor configured to determine that a high-priority channel collides with a low-priority channel. The high-priority channel and the low-priority channel are uplink channels. The higher layer processor is also configured to drop at least a portion of the low-priority uplink channel. The UE also includes transmitting circuitry configured to transmit the high-priority channel.

Provided are a communication method, system and related device, in the method, a terminal can perform reverse calculation of an uplink channel based on a first downlink CSI to obtain channel state information of the uplink channel, i.e., a first uplink CSI. In the application, measurement of the uplink channel is realized without a method of interacting an uplink reference signal between the terminal and the network device, but reverse calculation is performed on the uplink channel based on the reciprocity calibration result of the radio frequency channel of the terminal, measurement of the uplink channel is realized, and the first uplink CSI is obtained, so that signaling interaction can be reduced, and user experience is improved. And the measurement efficiency of the uplink channel can also be improved.

The invention discloses a feedback method of a channel state information report, a terminal and network side equipment, and belongs to the technical field of wireless communication, the feedback method of the channel state information report in the embodiment of the invention comprises the following steps: the terminal determines a plurality of uplink channel resources associated with at least one target CSI (Channel State Information) report, under the condition that the number of the target CSI reports is multiple, at least one target CSI report in the multiple target CSI reports is associated with multiple uplink channel resources; and the terminal feeds back the at least one target CSI report based on the plurality of determined uplink channel resources.

The invention provides an uplink transmission method and related equipment, in the method, terminal equipment receives configuration information of a first cell, and the first cell is only used for uplink transmission; the terminal device receives a first signal of a second cell, the first signal being used for determining at least one of time-frequency synchronization of the first cell, transmission power of an uplink channel of the first cell, and radio resource management of the first cell. Wherein the first cell is only used for uplink transmission, and after the terminal device receives the configuration information of the first cell, the terminal device can access the network device through the first cell to realize uplink communication. Therefore, since the first cell is only used for uplink transmission, the number of downlink carriers needing to be detected by the terminal device is reduced, and the complexity and power consumption of the terminal device are further reduced.

An operating method of a terminal in a wireless communication system may include receiving, from a base station, configuration information for repetitive transmissions of uplink data, based on the configuration information, determining a redundancy value (RV) value of the uplink data, and transmitting the uplink data based on the RV value, wherein the determining of the RV value may include determining the RV value by comparing a number of symbols configured by the base station with a number of symbols used for the repetitive transmissions of the uplink data.

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.

The invention discloses a channel estimation method and device, relates to the technical field of communication, and can shorten the time of estimating an uplink channel and improve the accuracy of estimating the uplink channel. The method comprises the following steps: a terminal receives downlink reference signals of J time units; and the terminal determines time domain information according to the downlink reference signals of the J time units and reports the time domain information. And the terminal sends the first uplink reference signal. The base station determines an uplink channel according to the time domain information and the first uplink reference signal, the uplink channel is an uplink channel of J1 time units, J and J1 are both positive integers, and J is greater than J1. According to the scheme, the terminal determines the time domain information according to the downlink reference signals of the J time units, and the base station determines the uplink channels corresponding to the J1 time units through the time domain information and the first uplink reference signal. Therefore, the base station does not need to wait for the terminal to send the uplink reference signals in the J1 time units, and does not need to determine the uplink channels corresponding to the J1 time units according to the uplink reference signals.

A spatial adaptive multi-user service modulation and demodulation method suitable for various channel environments is characterized in that an uplink channel is configured with multiple paths of general carriers and multiple paths of helicopter special carriers in a frequency division mode, and the general carriers support uplink adaptive information transmission of terminals of various types and sizes in an MF-TDMA (Multimedia Frequency-Time Division Multiple Access) system; the on-satellite demodulator obtains a modulation coding mode of a burst data segment by identifying mode word information in a physical layer frame header, and demodulates a corresponding mode; the carrier special for the helicopter uses a continuous carrier mode, and multi-rate channel error correction coding and decoding under rotor wing shielding are supported in a channel interleaving mode. Downlink transmission is carried out in a fixed time slot and free time slot time division mode, and downlink information transmission for universal multi-type terminals and helicopter terminals can be supported at the same time. Compared with a common spatial modulation and demodulation method, the modulation and demodulation scheme provided by the invention can support adaptive transmission of general services of multiple types of terminals and helicopter service information on both an uplink and a downlink by using one satellite-borne modem.

The present application provides an uplink transmission method and a related device. The method comprises: a terminal device receives configuration information of a first cell, wherein the first cell is used for only uplink transmission; and the terminal device receives a first signal of a second cell, the first signal being used for determining time-frequency synchronization of the first cell, and determining at least one of the transmission power of an uplink channel of the first cell and radio resource management of the first cell. The first cell is used for only uplink transmission, and after receiving the configuration information of the first cell, the terminal device can access a network device by means of the first cell to realize uplink communication. Therefore, the first cell is used for only uplink transmission, so that the number of downlink carriers needing to be detected by the terminal device is reduced, thereby reducing the complexity and power consumption of the terminal device.

The disclosure is related to a method, performed by a user equipment (UE), for Sounding Reference Signal (SRS) transmission, comprises the steps of:—receiving configuration of an SRS bundling function for enabling SRS bundling; —receiving an aperiodic SRS triggering indication in a determined DCI; —receiving resource allocation containing at least a determined transmission slot for a first uplink channel in the determined DCI; when the SRS is triggered, if the triggered SRS is enabled for SRS bundling by the SRS bundling function, transmitting the SRS in the same determined transmission slot as the first uplink channel.

The invention provides a signal transmission method, apparatus and device, a medium and a program product. The method comprises the steps of sending an access response message and an uplink measurement signal configuration signaling to a target terminal; receiving an uplink measurement signal periodically sent by the target terminal according to the uplink measurement signal configuration signaling; obtaining uplink channel quality information; the target terminal is indicated to report downlink channel quality information; determining a target main link and a target auxiliary link with the target terminal according to the uplink channel quality information and the downlink channel quality information, and sending a main link configuration signaling of the target main link to the target terminal; receiving a main link configuration completion signaling sent by the target terminal according to the main link configuration signaling; and sending a link resource configuration signaling to the target terminal through the target main link. According to the invention, the main link and the auxiliary link are determined based on the channel states of the two links, so that the resource utilization rate and the transmission reliability are effectively improved.

The invention provides an information prediction method and device, network equipment and node equipment. The method comprises the following steps: sending service transmission prediction information of a scheduling terminal at a first moment to a first node; the service transmission prediction information comprises an uplink interference prediction value and / or a channel matrix prediction value; the first moment is after the second moment, and the first node obtains the uplink reference signal sent by the terminal at the second moment. By adopting the method, a first network device can send service transmission prediction information of a first moment scheduling terminal to a first node, and the first moment is located after a second moment of acquiring an uplink reference signal sent by the terminal, so that the first node can schedule the service transmission prediction information of the terminal according to the service transmission prediction information of the terminal at the first moment. And determining the uplink channel quality, ensuring that the selected MCS value can conform to the channel quality at the uplink PUSCH data service transmission moment, and avoiding the problem that the selected MCS value does not conform to the channel quality at the uplink PUSCH data service transmission moment.

The present application provides a communication method and system, and a related apparatus. In the method, a terminal can perform reverse calculation on an uplink channel on the basis of first downlink CSI to obtain channel state information, i.e., first uplink CSI, of the uplink channel. In the present application, it is not necessary to measure the uplink channel by means of a method of performing interaction on an uplink reference signal by means of the terminal and a network device; instead, reverse calculation is performed on the uplink channel on the basis of a reciprocity calibration result of radio frequency channels of the terminal to measure the uplink channel, so as to obtain the first uplink CSI. Therefore, signaling interactions can be reduced, and the measurement efficiency for the uplink channel can also be improved.