1720 results about "Downlink transmission" patented technology

Methods, systems, and devices for spectral sharing wireless systems, wherein multiple user devices share time and frequency resources for uplink and / or downlink transmissions, are described. One example method includes transmitting transmission symbols from the network station to at least one user device by processing through a first precoder and a pre-compensation stage, wherein the pre-compensation stage is selected to have the transmission symbols receivable at the at least one user device to appear as if the transmission symbols are processed by a second precoder different from the first precoder.

The present disclosure relates to electronic device, communication method and storage medium in a wireless communication system. There is provided an electronic device on side of control device, comprising a processing circuitry configured to: select one or more transmitting beams to be used for downlink transmission with a user equipment based on beam information reported by the user equipment; and control to indicate the one or more transmitting beams to the user equipment, wherein, the processing circuitry is configured to perform the selecting of transmitting beams according to a beam reporting mode of the user equipment, and to select a plurality of transmitting beams in case where the user equipment reports the beam information in a group-based beam reporting mode.

Systems and methods are disclosed that relate to configuring Channel State Information Reference Signal (CSI-RS) for Channel State Information (CSI) feedback associated with downlink transmission from multiple Transmission and Reception Points (TRPs). In one embodiment, a method performed by a User Equipment (UE) comprises receiving information that indicates, for one or more CSI-RS ports in one or more CSI-RS resources in a CSI-RS resource set: (a) multiple Transmission Configuration Indicator (TCI) states associated to each of the CSI-RS resource(s), (b) a single TCI state for each of multiple CSI-RS resources in the CSI-RS resource set, wherein the multiple CSI-RS resources are fully overlapping in time and frequency and each of the multiple CSI-RS resources is associated to a different TCI state, or both (a) and (b). The method further comprises performing channel measurement, determining a channel rank, computing a channel quality, and sending feedback comprising the rank and channel quality.

A communication method and apparatus, and a terminal, and pertains to the field of wireless communication. The communication method according to an embodiment of this application includes: processing, by a terminal, a target transmission based on bandwidth capability; where the bandwidth capability of the terminal is a predetermined value, the predetermined value is less than or equal to 5 MHz, and the target transmission includes a first downlink transmission and / or a first uplink transmission.

Embodiments of the present disclosure relate to methods and apparatuses for frequency domain resource assignment on multiple carriers scheduled by a single DCI. According to some embodiments of the disclosure, a UE may: determine a payload size of a DCI format, wherein the DCI format schedules a first plurality of carriers of a second plurality of carriers, wherein the second plurality of carriers is configured by a BS; receive, from the BS, the DCI format according to the determined payload size, wherein the first plurality of carriers is indicated by a first indicator of the DCI format or is configured by the BS; determine RBs assigned on the first plurality of carriers based on the DCI format; and receive downlink transmissions on the assigned RBs in the case that the DCI format schedules the downlink transmissions, or transmit uplink transmissions on the assigned RBs in the case that the DCI format schedules the uplink transmissions.

Methods, systems, and devices for wireless communications are described. The described techniques relate to improved methods, systems, devices, and apparatuses that support random-access occasion (RO) selection for reduced-capability (RedCap) user equipment (UEs). A RedCap UE operating in a half-duplex mode may use the techniques described herein to efficiently select an RO in which to transmit a random-access preamble based on a duration between a latest received downlink transmission and the RO satisfying a threshold duration. The UE may receive system information mapping a set of synchronization signal blocks (SSBs) to a set of ROs. The UE may then select an RO from the set of ROs in which to transmit the random-access preamble such that the UE has sufficient time to transition from a receive mode to a transmit mode to transmit the random-access preamble.

This disclosure provides methods and devices for managing the allocation of resources for uplink (UL) and downlink (DL) transmissions associated with a scheduled time period. In some implementations, a wireless station (STA) transmits, to an access point (AP), a request frame indicating a bandwidth or a quantity of spatial streams (or both) for the UL transmissions, and indicating a bandwidth or a quantity of spatial streams (or both) for the DL transmissions. In some instances, the request frame also may indicate the STA's intention to transmit UL data as duplicates carried on different communication links. The STA receives a trigger frame indicating that the STA is scheduled to transmit or receive data during the time period. The STA transmits data to, or receives data from, one or more other devices during the time period.

A method, network node and wireless device (WD) for downlink (DL) pre-compensation and quasi-collocated (QCL) signaling for coherent joint transmission are disclosed. According to one aspect, a method in a network node includes transmitting (S144) a first reference signal (RS) over a first transmission-reception point (TRP) and a second RS over a second TRP. The method includes receiving (S146) time delay difference and / or a frequency difference information between the TRPs. The method includes transmitting (S148) the DL channel with a delay pre-compensation and / or a frequency pre-compensation over the first TRP and without delay or frequency pre-compensation over the second TRP. The method includes transmitting (S150) QCL information indicating whether a DL channel transmitted from the first and second TRPs is pre-compensated. The method further includes pre-compensating (S152) the DL transmission over the first TRP according to the received time delay difference or frequency difference.

This disclosure provides methods, components, devices and systems for access point (AP)-aided downlink transmission opportunity (TXOP) preemption by stations (STAs) with low-latency uplink traffic. Some aspects more specifically relate to how a STA transmits a preemption indication (PRI) associated with a signature of the STA and how an AP, via reception of signature-based PRIs, may obtain information relating to which specific STAs have low-latency traffic ready for uplink transmission. Such signatures may relate to a resource allocation, such as a tone pattern, used to transmit at least a portion of a PRI. In some examples, the AP transmits a preemption scheduling (PRS) frame that includes channel access information, for each of the STA(s) that sent a PRI, associated with a downlink TXOP of the AP. Such channel access information may include at least a grant of permission for STA(s) to attempt uplink preemption of the downlink TXOP.

An apparatus for wireless communication at a UE is disclosed. The apparatus comprises memory and at least one processor coupled to the memory. The apparatus is configured to measure a CMR for each of one or more downlink transmission beams. The apparatus is further configured to transmit a L1 measurement report including one or more measurements for the CMR and a reception beam identifier (ID) for a reception beam for each of the one or more measurements. Different measurements associated with a same CMR are associated with different UE identified reception beams

The invention discloses an RIS division and resource optimization method for an RIS-assisted millimeter wave NOMA system. The method comprises the following steps: constructing a downlink millimeter wave NOMA multi-user system model; wherein the system model comprises a base station, an RIS and K terminal devices, and the K terminal devices are divided into I clusters; constructing an RIS model, a channel model and a transmission model according to the system model; determining an optimization problem according to the constructed model; and on the basis of the optimization problem, performing joint optimization on terminal equipment grouping, RIS division, active beam forming, passive beam forming and power distribution so as to maximize the total achievable rate of the terminal equipment in downlink transmission. The method overcomes the problems of limited transmission distance and signal shielding of millimeter wave communication, meets the large-scale connection requirement, improves the system performance, and can be widely applied to the technical field of wireless communication.

Lossless compression for HARQ-ACK codebooks with different BLER is described. An apparatus is configured to receive downlink transmission(s) from a network node. The apparatus is configured to transmit two-part HARQ-ACK feedback for the downlink transmission(s) based on: a first compression data set for a first HARQ-ACK codebook and a second compression data set for a second HARQ-ACK codebook, and / or a third compression data set based on a combination of the first and second HARQ-ACK codebooks. Another apparatus is configured to configure a UE with a first configuration for a first compression data set, a second compression data set, or a third compression data set, or a second configuration for a first rate, a second rate, or a third rate. The apparatus is configured to receive two-part HARQ-ACK feedback for a downlink transmission(s) based on the first and second compression data sets or the third compression data set.

Embodiments of the present disclosure provide a signaling transmission method, a device, and a storage medium. The method comprises: sending indication information on an uplink transmission resource allocated via a configured grant (CG), or receiving indication information on a downlink transmission resource allocated via semipersistent scheduling (SPS), and the indication information is configured for indicating a target transmission resource. A terminal sends the indication information for indicating the target transmission resource on the CG-allocated uplink transmission resource, and a network device can obtain an actual sending situation of a resource reserved for the CG within a period of time, to prevent uplink CG resource waste or resource collision; or the terminal receives the indication information for indicating the target transmission resource on the SPS-configured downlink transmission resource, and the terminal can know whether to detect and receive data on the target transmission resource, to avoid unnecessary power consumption overhead.

Provided are a configuration method for information transmission, an electronic device and a storage medium. The configuration method for information transmission includes, in a case of continuously transmitting at least two times of downlink information, configuring a transmission interval K between downlink transmissions.

Disclosed are a method and apparatus for performing downlink transmission and reception and uplink transmission and reception in a wireless communication system. Subband configuration information for full duplex communication is transmitted from a base station to a UE. The UE performs the downlink reception or the uplink transmission through a subband based on the received subband configuration information. The subband configuration information includes frequency resource configuration information and time resource configuration information. In an event that the subband is configured based on the frequency resource configuration information, a frequency resource of the subband is configured based on a common resource block (CRB). In an event that the subband is configured based on the time resource configuration information, a time resource of the subband is configured based on at least one subband pattern having a period.

Provided are a method and apparatus for data transmission on an unlicensed spectrum, a device, and a storage medium, relating to the technical field of communications. The method comprises: acquiring a channel occupancy time (COT); and sending a target uplink transmission to a network device by means of a first time domain resource in the COT, wherein a second time domain resource in the COT can be used by the network device to send a target downlink transmission, and the second time domain resource is located after the first time domain resource on a time domain. In this way, there is a higher probability of a network device accessing an unlicensed spectrum under the condition of ensuring the fair sharing of resources on the unlicensed spectrum.

A method, apparatus and computer readable medium for resource determination in wireless communication. Uplink transmission resource allocation in scenarios involving simultaneous uplink and downlink transmission are addressed by determining frequency-domain resources occupied by an uplink subband based on a protocol. The determination is based on the resource blocks (RBs) of an uplink bandwidth part (BWP) in an uplink slot. A reference RB is used to identify the subband's location, ensuring that the number of RBs occupied by the uplink subband is consistent with those occupied by the uplink BWP.

A terminal according to an aspect of the present disclosure includes: a receiving section that receives information indicating a spatial relation between a reference reference signal (RS) and a target RS with respect to uplink (UL) and downlink (DL) transmission configuration indication (TCI) states; and a control section that controls to apply the TCI states to a UL channel and the target RS based on the information. According to the aspect of the present disclosure, appropriate UL transmission can be implemented.

A wireless transmit / receive unit (WTRU) may be configured to receive configuration information associated with a first transmission configuration indicator (TCI) state group and a second TCI state group. The WTRU may be configured to report first respective measured downlink received power values and first respective determined power reduction values. The WTRU may be configured to report second respective measured downlink received power values and second respective determined power reduction values. The WTRU may be configured to receive an indication of the first TCI state group via a downlink transmission. The WTRU may be configured to determine a first TCI state from the first TCI state group based on downlink received power information and power reduction information. The WTRU may be configured to send an uplink transmission based on the first determined TCI state.

Embodiments include methods for a user equipment (UE) to synchronize timing with a wireless network. Such methods include receiving, from a first node serving a first cell in the wireless network, a first message that includes an absolute reference time and a corresponding reference event within downlink, DL, transmissions by the first node; and determining whether the UE received, from the first node, a timing adjustment value from which the UE can estimate a propagation delay of the DL transmissions. Such methods include, based on determining that the UE did not receive the timing adjustment value, performing one of the following: transmitting, to the first node, an indication that the UE did not receive the timing adjustment value; or declaring radio link failure with respect to the first cell and establishing a connection with a second cell capable of providing the information included in the first message.

Apparatus and methods are provided to enhance communications for NTN. In some aspects, a base station (BS) comprises a processor configured to schedule an uplink transmission in response to an uplink transmission request from a user equipment (UE) using one or more subframes ranging from a first uplink subframe to a last uplink subframe. The processor is further configured to determine or receive a timing advance (TA) indicating amount of subframes transmitted during a time delay between the UE and the BS and schedule a downlink transmission aligned with the uplink transmission. The downlink transmission is blocked from subframes ranging from TA plus one or more subframes ahead of the first uplink subframe to TA minus one or more subframes ahead of the last uplink subframe. The processor is further configured to transmit and receive, via a non-terrestrial equipment, the uplink and the downlink.

The invention provides a signal transmission method and device in a passive Internet of Things, equipment and a storage medium, the signal transmission method in the passive Internet of Things comprises the following steps: determining first passive Internet of Things downlink control information, the first passive Internet of Things downlink control information being related to uplink transmission TBS or uplink or downlink transmission resources; and sending a first downlink control signaling comprising the first passive Internet of Things downlink control information to the second communication node.

The invention discloses an LEO satellite power distribution and association method and system based on a cellular-free architecture in the technical field of wireless communication, and the method comprises the steps: carrying out the maximum ratio transmission precoding of all satellite access points, and generating a coding modulation signal; after the target users receive the coded modulation signals, receiving signals are formed at a receiving end, and the signal-to-interference ratio and the downlink transmission rate of each target user are calculated through the receiving signals; accumulating downlink transmission rates of all target users through a central satellite, and calculating system energy efficiency in combination with total power consumption of all satellite access points; and constructing an objective function with maximization of the system energy efficiency, solving the objective function through an iterative optimization algorithm under the constraint condition of a satellite transmitting power upper limit and a user-satellite coverage relationship, and determining an optimal power allocation and user-satellite association scheme. The method can adapt to the high-speed motion characteristic of the LEO satellite, and the system energy efficiency and the resource utilization rate are remarkably improved.

Aspects relate to enhancing communication between ambient IoT devices and network entities using wireless energy transmitter (WET) devices. A WET device may be configured to provide a continuous wave (CW) signal to an ambient IoT device to both power the ambient IoT device and facilitate backscattering and modulation of the CW signal by the IoT device. The IoT device may then transmit the backscattered and modulated CW signal as an uplink transmission to a network entity for processing of the modulated CW signal. The WET device may further avoid interference with a downlink transmission from the network entity by avoiding transmission of the CW signal within downlink slots, transmitting the CW signal within a different frequency band than the downlink transmission, and / or transmit the CW signal on a helper tone separated in frequency from a data tone of the downlink transmission.

A user equipment (UE) may transmit a configured-grant uplink control information (CG-UCI) to a base station during a channel occupancy time (COT) initiated by the UE in a shared spectrum, the CG-UCI comprising COT sharing information, the COT sharing information indicating, at least, an index value corresponding to a combination of: an indication of an offset to a beginning of a downlink transmission opportunity during the COT; an indication of a duration of the downlink transmission opportunity during the COT; and an indication of a channel access priority class (CAPC) value used by the UE to initiate the COT. The base station may transmit a downlink transmission to the UE within the downlink transmission opportunity and in accordance with the COT sharing information in the transmitted CG-UCI. Apparatuses are also disclosed.

A WTRU operating in an inactive state may be associated with a first cell. The WTRU may be configured to receive configuration information for a time period associated with small data transmission failure detection and a search space associated with small data transmission. The WTRU may be configured to send a first small data transmission and start the time period. The WTRU may be configured to monitor for a downlink transmission in the search space during the time period. If a condition for cell reselection is satisfied during the time period or the restarted time period, the WTRU may be configured to suspend a data radio bearer (DRB) associated with small data transmission, select a second cell, perform a random access procedure associated with the second cell, and send a small data transmission. The random access procedure may include sending a request to resume a radio resource control (RRC) connection.

A method and an apparatus for transmitting and receiving channel state information (CSI) in a wireless communication system are disclosed. A method of performing downlink reception by a user equipment (UE) in a wireless communication system according to an embodiment of the present disclosure may comprise: receiving, from a base station, configuration information for two or more control resource set (CORESET) groups, each of the two or more CORESET groups including at least one CORESET; receiving, from the base station, information indicating two or more transmission configuration indicator (TCI) states; and based on the two or more TCI states, updating TCI state information for the two or more CORESET groups. Here, at least one of the two or more CORESET groups may include a specific CORESET associated with a plurality of TCI states.

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.

A wireless transmit receive unit (WTRU) may receive an indication of a transmitted synchronization signal block (SSB) included in a SSB burst and an indication of a skipped SSB in the SSB burst. The skipped SSB is not transmitted by the base station in the SSB burst. The WTRU may determine to send an indication that the WTRU wants to use the skipped SSB for or after the initial access procedure. The WTRU may transmit a random access preamble using a random access resource and receive at least one downlink transmission using a beam associated with the skipped SSB.

A communication method and a communication device, the communication method comprising: a terminal device receiving indication information, the indication information being used for enabling first information comprising a transmission opportunity conflicting with an SSB, the first information being used for indicating whether a transmission opportunity in a configuration authorization CG window is used; and sending the first information according to the indication information. Through the method, the first information (such as UTO-UCI) can be enabled through the indication information to indicate whether the transmission opportunity conflicting with the SSB in the CG window is used or not, so that the network equipment can determine when to measure the SSB in the same-frequency measurement and / or different-frequency / different-system measurement process of the terminal equipment; therefore, uplink and downlink transmission with the terminal equipment can be carried out on the time unit when the terminal equipment does not execute SSB measurement, resource waste can be avoided, and the capacity of a network system is improved.