868 results about "Downlink transmission" patented technology

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

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.

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.

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 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.

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 method for operating a user equipment (UE) comprises receiving configuration information including a list of component carriers (CCs) and at least K transmission configuration indicator (TCI) states, where K>1 and each TCI state includes a TCI state identifier (ID) and a quasi co-location information (QCL-Info). The method further includes receiving an activation command via medium access control-control element (MAC-CE) to activate N TCI state IDs from K TCI state IDs, wherein N<K and the activation command is common across the list of CCs, determining a TCI state Ti for a CC i in the list of CCs based on the activated N TCI state IDs, and transmitting an uplink (UL) transmission or receiving a downlink (DL) transmission for the CC i based on a QCL-Info included in the determined TCI state Ti.

The invention provides a method for testing the communication bandwidth of a 10-gigabit network between an FPGA (Field Programmable Gate Array) and a CPU (Central Processing Unit), which is applied to a radar system. The FPGA completes a function of regularly generating data and a function of downlink transmission of the data; the 10-gigabit network exchange board card completes data transmission and sends data to the CPU board card through a 10-gigabit network; and the CPU board card receives the data and calculates the communication bandwidth and the network quality. According to the invention, the limitation of traditional single-port point-to-point transmission or simple multi-port parallel transmission on synchronization, load balancing or protocol overhead is solved, and a solution is provided for how to effectively utilize multiple ports, enable the multiple ports to simultaneously and efficiently work and ensure parallel transmission of data without mutual interference.

The invention discloses a reconfigurable intelligent surface (RIS)-assisted multiple-input-multiple-output (MIMO) implicit channel estimation method based on a graph attention network, which is used for efficient downlink transmission in a multi-user scene. Firstly, a graph attention network is designed, user nodes and RIS nodes are modeled in a unified mode, received pilot signals serve as initial features, spatial feature expression is enhanced in combination with user three-dimensional position information, and therefore interference between users and a spatial correlation structure are accurately represented; secondly, end-to-end feature aggregation is achieved based on a message passing mechanism, a base station beam forming matrix and an RIS reflection coefficient are directly predicted under the condition that explicit channel estimation is not needed, and the total transmitting power constraint and the unit mode constraint are met through normalization processing so as to complete joint optimization; according to the method, the users and the speed of the system can be remarkably improved under limited pilot frequency overhead, and the method has excellent generalization performance and robustness in a multi-user complex propagation environment.

A system and method for enabling downlink signal transmission in a Multiple-Input Multiple-Output (MU-MIMO) system is provided. The method comprises of creating a scheduling information based on MU-MIMO Scheduling of a plurality of User equipments (UES), multiplexing the plurality of UES paired based on the scheduling decisions across time, frequency and code, inputting transport blocks of each UE pushed on to a Downlink shared channel (DLSCH), performing bit processing of each of the CRC encoded UEs, inputting Code-rate (MCS) for data modulation mapping on a post bit processed data, assigning DM-RS ports to the UE based on allocated MCS and number of antenna ports from a scheduling information structure, adding, a Partial Port Occupancy information (P-Poi) for each UE along with the scheduler information structure required for demodulation at UE and enabling optimal channel estimation at UE by adding new DM-RS port combinations using reserved fields in the DCI messaging.

A user equipment according to an aspect is registered with a first mobile network by using a first subscriber identity module (SIM) and registered with a second mobile network using a second SIM. The user equipment includes a processor. The processor executes a process of receiving, from the first mobile network, configuration information for configuring either a non-execution timing for not executing downlink transmission from the first mobile network to the user equipment or an execution timing for executing the downlink transmission. The processor executes a process of transmitting, to the second mobile network, identification information for identifying a timing configured according to the configuration information.

Various aspects of the present disclosure relate to a user equipment (UE) that receives, from a base station, a signaling indicating an orthogonal angular momentum (OAM) multiplexing configuration of one or more configured OAM modes. The UE can apply at least one of the configured OAM modes for receiving a downlink transmission and / or transmitting an uplink transmission. The base station transmits the OAM multiplexing configuration of the one or more configured OAM modes to be applied at the UE, and the base station can then receive, from the UE, an uplink transmission with at least one of the configured OAM modes applied.

Various aspects of the present disclosure relate to a base station and methods that manage cross-link interference during wireless communication especially in dynamic time division duplexing (TDD) using flexible symbols. In one aspect, a processor of an originating base station is configured to cause the base station to: determine downlink transmission parameters to communicate downlink resources to the one or more user equipment (UEs); and identify a spatial pattern to communicate the downlink resources to the one or more UEs. The processor is further configured to cause the base station to communicate, to a second base station, a spatial pattern information element (IE) containing at least one indication of the spatial pattern for cross-link interference management, the spatial pattern IE enabling the second base station to mitigate interference.

Configured grant (CG) channel occupancy time (COT) sharing procedure is disclosed. A user equipment (UE) sharing a COT may indicate in the uplink control indicator (UCI) the remaining COT duration, an offset indication identifying where the uplink transmission is expected to end, and a channel access priority class (CAPC) which may be used by the base station to determine which type of data may be included in downlink transmissions in the shared COT. Where the energy detection (ED) threshold has not been configured for COT sharing, the UE may reduce the information included in the UCI. The base station may alternatively configured which information for the UE to include in the UCI for potential COT sharing. The COT sharing information may further be compressed by coding such information into tables or leveraging knowledge of transmission characteristics, such as configured end points.

Methods and systems to enhance NR RACH procedure to accommodate non-terrestrial networks (NTN) are disclosed. The length of the RAR window may be extended. In one aspect, a gNB of the NTN may perform blind retransmissions of the RAR message scheduled by DCI within the RAR window to user equipment to improve transmission reliability of the RAR message for NTN. The number of blind retransmission and the transmission pattern may depend on the PRACH reception condition, an uplink channel condition, or may be pre-configured. In one aspect, the gNB may extend the K1 value and K2 value that determine the delays between uplink and downlink transmissions to align the time domain duplex (TDD) uplink-downlink configuration due to the long propagation delays associated with the NTN. In one aspect, the gNB may broadcast or multicast RAR window size extension values to the UEs based on the orbital altitude of the satellites.

A base station and / or a wireless device may perform a communication procedure. A downlink transmission for initiating the communication may indicate an antenna panel for transmission of an uplink signal from the wireless device. A slot for transmission of the uplink signal may be determined based on an antenna panel activation delay.

Embodiments of this disclosure provide a hybrid automatic repeat request (HARQ) bitmap information feedback method and a related device. The method includes: A terminal receives indication information from an access network device, where the indication information is used to determine whether HARQ feedback is needed for a transmit block transmitted in a plurality of downlink transmission units. The terminal determines HARQ bitmap information based on the indication information, where the HARQ bitmap information includes HARQ feedback information of at least one target transmission unit, and the target transmission unit indicates a downlink transmission unit that needs HARQ feedback in the plurality of downlink transmission units. The terminal sends the HARQ bitmap information to the access network device. Some embodiments of the present disclosure can reduce feedback resource overheads in an NTN scenario, reduce a communication delay, and improve a communication throughput rate.

A common PDSCH repetition transmission indication method includes: determining, by a terminal, a number of repetition transmissions for first downlink transmission based on first indication information, where the first indication information is used to indicate at least one number of repetition transmissions, and the first downlink transmission is common PDSCH repetition transmission.

The apparatus may be a wireless device configured to receive, for a first symbol, an indication of a plurality of scheduled transmissions comprising a first downlink transmission in a downlink direction and a second uplink transmission in an uplink direction, wherein the plurality of scheduled transmissions comprises at least one transmission associated with a first serving cell operating in a sub-band full duplex (SBFD) mode of operation and an additional transmission associated with an additional serving cell in a plurality of serving cells, determine, based on one or more prioritization rules, a prioritized transmission direction for the first symbol, and refrain, based on the determined prioritized transmission direction, from one of transmitting an uplink transmission or receiving a downlink transmission associated with the plurality of serving cells.

A wireless device receives one or more configuration parameters indicating one or more time durations for performance monitoring of a prediction model. Each of the one or more time durations is associated with respective downlink reference signals (RSs) for the performance monitoring. The wireless device determines whether to use, for the performance monitoring, a plurality of first downlink RSs associated with a first time duration of the one or more time durations, wherein determining is based on a quantity of one or more first downlink RSs, among the plurality of first downlink RSs, that overlap, in the first time duration, with: one or more downlink or uplink transmissions; or one or more cell inactive time periods of downlink transmissions. The wireless device transmits, based on determining whether to use the plurality of first downlink RSs, a report of the performance monitoring.

Methods, systems, and devices for wireless communications are described. A user equipment (UE) may receive a control message that indicates one or more parameters for lossy compression of a feedback payload. The one or more parameters may indicate at least a compression ratio between an original feedback payload size and a compressed feedback payload size. The one or more parameters may also indicate a bundle size, a quantity of bundles, a quantity of most likely outcomes to distinguish, a quantity of negative acknowledgments (NACKs) to be distinguished, or a combination thereof. The UE may monitor for one or more downlink transmissions associated with the feedback payload and transmit the feedback payload based on the one or more downlink transmissions. The feedback payload may be compressed from the original feedback payload size to the compressed feedback payload size in accordance with the one or more parameters.

A resource configuration method performed by a terminal, includes: receiving at least one first configuration applied to a first sub-band resource sent by a base station, in which the first configuration includes one or more of: a period, a reference subcarrier interval, and a transmission configuration, the transmission configuration comprises a transmission configuration applied to the first sub-band resource for all downlink (DL) transmission, a transmission configuration applied to the first sub-band resource for all uplink (UL) transmission, or a transmission configuration applied to the first sub-band resource for both UL and DL transmission; and receiving a second configuration sent by the base station, in which the second configuration represents a cell specific TDD-UL-DL configuration.

Techniques for supporting non-terrestrial fronthaul network architectures are provided. In one example, a wireless network includes: a satellite comprising a radio unit; a satellite gateway in communication with the satellite; and a distributed unit located on Earth and in communication with the satellite gateway. Using ephemeris data for the satellite and the location of the gateway, maximum and minimum distances between the gateway and the satellite are determined for a time period when the satellite will be in line-of-sight communication with the satellite gateway. Based on the maximum and minimum distances, maximum and minimum propagation times for signals exchanged between the satellite and the gateway during the time period are determined. Using the maximum and minim propagation times, the distributed unit coordinates uplink and downlink transmission windows with the radio unit.

This application provides communication methods and apparatuses. One method includes: accessing, by a terminal device, an access network device by performing first random access in a radio resource control inactive (RRC inactive) state, and receiving, by the terminal device by using a first receive beam for downlink transmission of the first random access, downlink control information (DCI) transmitted by the access network device.

In a wireless local area network (WLAN) system, an AP multi-link device (MLD) may estimate an uplink transmission time of a non-simultaneous transmit and receive (STR) station (STA) MLD, and on the basis of the time estimation, uplink transmission and downlink transmission in links of the non-STR STA MLD may not overlap.

Embodiments of the present disclosure relate to methods and apparatuses for downlink (DL) transmission in a full duplex (FD) system. According to some embodiments of the present disclosure, a user equipment (UE) may include: a transceiver configured to receive configuration information which configures at least one subband; and a processor coupled to the transceiver and configured to determine, based on an indication, an active subband from the at least one subband for physical downlink shared channel (PDSCH) rate match or for uplink (UL) transmission or that none of the at least one subband is activated for PDSCH rate match.

Methods and apparatus for uplink control enhancement in wireless communications are disclosed. In an example, a method includes receiving information related to a set of downlink SPS configurations, receiving downlink SPS transmission(s) based on the received information, determining a payload of UCI for transmission over an uplink channel, the payload comprises a set of HARQ feedback bits based on the received information, determining that at least one triggering condition for segmenting the set of HARQ feedback bits is satisfied, determining at least a portion of the set of HARQ feedback bits based on at least a downlink SPS configuration of the set of downlink SPS configurations, wherein the determined portion of the set of HARQ feedback bits corresponds to a respective subset of the received downlink SPS transmission(s), and transmitting at least the determined portion of the set of HARQ feedback bits using the uplink channel.

A method comprises receiving, by a wireless device, one or more messages indicating transmission configuration indicator (TCI) states for downlink transmissions, and receiving a medium access control control element (MAC CE) activating a plurality of TCI states of the TCI states. The method comprises receiving downlink control information (DCI) indicating a TCI state from the plurality of TCI states, and receiving, based on a reference signal identified during a random access procedure and before application of the TCI state, one or more downlink signals.

There is provided an apparatus for a terminal, wherein the apparatus has means for receiving, from a network entity, an indication of a discontinuous transmission configuration associated with the network entity, wherein the indication indicates to the terminal that the network entity will refrain from providing downlink transmissions during a time period associated with the discontinuous transmission configuration. The apparatus also has means for determining whether at least one of: a reception at the terminal, and a transmission from the terminal, will at least partially overlap with the time period associated with the discontinuous transmission configuration. The apparatus also has means for, when it is determined that at least one of: the reception and the transmission will at least partially overlap with the time period, performing an action associated with the determined reception and / or transmission.

Methods, systems, and devices for wireless communication at a user equipment (UE) are described. A UE may identify that carrier switching is enabled at the UE for a physical uplink control channel and may receive a control signal that lacks an indication for carrier switching. The UE may monitor for a downlink transmission on a primary serving cell of a set of serving cells in a physical uplink control channel group. The UE may then select one of the set of serving cells to transmit feedback information for the downlink transmission, where the selecting is based on carrier switching being enabled at the UE while the control signal lacks the indication for carrier switching. The UE may transmit, to the network entity, the feedback information for the downlink transmission in accordance with the selecting.