531 results about "Downlink transmission" patented technology

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 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 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.

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.

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.

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.

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.

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.

Provided are an electronic device and method for wireless communication, and a computer-readable storage medium. The electronic device comprises: a processing circuit which is configured to: send downlink reference signal resource configuration information to a user equipment, so as to perform downlink beam scanning, wherein the downlink reference signal resource configuration information comprises information of a transmit receive point that transmits a downlink transmission beam; and receive a packet-based beam quality report from the user equipment, wherein the packet-based beam quality report is used for a network side to determine, for the user equipment, a group of downlink transmission beams which can be simultaneously transmitted and can be simultaneously received by the user equipment.

Embodiments of the present disclosure relate to methods and apparatuses for frequency domain resource indication in a multi-cell scheduling scenario. According to some embodiments of the disclosure, a UE may: receive, from a BS, a DCI format scheduling a first set of cells among a second set of cells configured for the UE by the BS, wherein the DCI format includes a first field indicating whether one or multiple cells are scheduled by the DCI format and a second field for indicating frequency domain resource assignment; determine RBs assigned on the first set of cells based on the first and second fields; and receive, from the BS, downlink transmissions on the assigned RBs in the case that the DCI format schedules the downlink transmissions, or transmit, to the BS, uplink transmissions on the assigned RBs in the case that the DCI format schedules the uplink transmissions.

Embodiments of the present disclosure relate to methods and devices for discontinuous transmission (DTX) or discontinuous reception (DRX). A terminal device receives a DTX or DRX configuration indicating configuration information on a DTX or DRX mode of the network device. The terminal device monitors a downlink transmission or performs an uplink transmission based on one or more conditions regardless of the cell DTX or DRX configuration. In this way, an improved solution for communication on the DTX or DRX mode may be provided, which may meet certain services with low latency requirement.

The disclosure relates to a communication method and system for converging a 5th-Generation (5G) communication system for supporting higher data rates beyond a 4th-Generation (4G) system with a technology for Internet of Things (IoT). The disclosure may be applied to intelligent services based on the 5G communication technology and the IoT-related technology, such as smart home, smart building, smart city, smart car, connected car, health care, digital education, smart retail, security and safety services. According to embodiments of the disclosure, methods and devices for efficient uplink and downlink transmission are provided, so that delay can be reduced and reliability can be improved.

Methods and apparatus are provided for wireless communication by a network device. The network device configures a network-controlled repeater (NCR) to generate a dynamic hybrid automatic repeat request acknowledgement (HARQ-ACK) codebook including HARQ-ACK bit sequences from a plurality of HARQ-ACK groups associated with different downlink (DL) transmission types. The network device also configures the NCR with a different set of counter downlink assignment index (cDAI) and total downlink assignment index (tDAI) values for each of the plurality of HARQ-ACK groups.

A WTRU may send an indication of a maximum number of RSMA layers and / or a maximum number of MIMO layers per RSMA layer. The WTRU may receive a first configuration associated with reception of common messages of rate splitting-based transmission (RS-based-T) and / or a second configuration associated with reception of WTRU-specific messages (WSM) of RS-based transmission. The first configuration may indicate CBG information associated with the common messages of RS-based-T. The second configuration may indicate CBG information associated with the WSM of RS-based-T. The WTRU may receive a downlink transmission that includes a RS-based common message and / or a RS-based WSM in accordance with the first and second configuration. The WTRU may transmit HARQ feedback for the downlink transmission that includes HARQ feedback for the RS-based common message and / or HARQ feedback for the RS-based WSM.

Certain aspects of the present disclosure provide techniques for network and user equipment (UE) coordinated transmission and reception beam level negotiation. An example method performed at a network entity (e.g., gNB) generally includes selecting a transmission beam level and a reception beam level, transmitting signaling indicating for a UE to use the selected reception beam level for reception of a downlink transmission, and transmitting the downlink transmission using the selected transmission beam level.

Various aspects relate generally to wideband scheduling with a variable throughput to improve energy efficiency (for example, reduce power consumption) for a user equipment (UE) scheduled to receive one or more high throughput data transmissions. Some aspects more specifically relate to a UE receiving information that configures variable throughput scheduling for one or more downlink transmissions with a peak throughput for an initial time period in one or more scheduling intervals, followed by transmissions at a reduced throughput for remaining time periods in the one or more scheduling intervals. For example, in some aspects, the information that configures the variable throughput wideband scheduling may include a downlink control information (DCI) message that indicates one or more slots where a wideband downlink transmission is scheduled and reduced throughput periods or gaps that allow the UE to avoid ramping up to a highest power state.

A communication method and apparatus relate to the field of communication technologies, to enable a network device to support communication of a new type of terminal device without additionally sending a set of complete system information. The method includes: The network device sends a SIB1 and supplementary information. Maximum transmission bandwidth of a first terminal device is different from that of a second terminal device. The supplementary information includes first information and / or second information, the SIB1 does not include the first information, and a parameter value of the second information included in the supplementary information is different from a parameter value of the second information included in the SIB1. After receiving the SIB1 and the supplementary information, the second terminal device accesses a network based on partial information other than the second information in the SIB1 and the supplementary information. Consumed resources for downlink transmission can be reduced.

Embodiments of the present invention provide a bandwidth allocation method and apparatus, user equipment, and a base station. The method includes: receiving, by user equipment, virtual bandwidth configuration information, where the virtual bandwidth configuration information is used for indicating a configuration of a virtual bandwidth; and performing, by the user equipment, signal reception and / or signal processing according to the virtual bandwidth indicated by the virtual bandwidth configuration information, where each virtual bandwidth is a part or all of a downlink maximum available bandwidth or a downlink transmission bandwidth, and the downlink maximum available bandwidth is a maximum bandwidth available for downlink transmission. In the embodiments of the present invention, reduction of overheads and reduction of complexity of signal reception and signal processing are implemented, and overheads and complexity of signal reception and processing feedback can be flexibly controlled.

There is provided techniques for performing an uplink reference signal transmission for downlink channel sounding. A method is performed by a UE being equipped with more antennas than receive chains. The method comprises sending a report to a network node serving the UE. The report comprises an indication of the UE supporting uplink reference signal based downlink channel sounding for reciprocity-based downlink transmission and indicates that the UE is equipped with more antennas than receive chains. The method comprises receiving uplink reference signal configuration from the network node. The uplink reference signal configuration is based on the report and comprises configuration of a set of uplink reference signal resources. According to the uplink reference signal configuration, at least one uplink reference signals is to be transmitted per antenna. The method comprises transmitting the uplink reference signals on the set of uplink reference signal resources in accordance with the uplink reference signal configuration.

This application provides a communication method and related equipment. The method includes: determining first information or second information, wherein the first information represents the difference between first channel state information of N first resource units in a first reference signal resource set and second channel state information of N second resource units in a first downlink transmission resource set, and the second information indicates the first channel state information of the N first resource units and the second channel state information of the N second resource units; and transmitting the first information or the second information. In this method, the network device determines the difference between the channel state information of the resource units based on the first information or the second information reported by the terminal device, thereby determining whether the channel state information obtained before transmitting information using the resource unit is accurate, so as to monitor the performance of the modulation scheme used in the communication process.

Methods, systems, and devices for wireless communications are described. For example, a method for wireless communications at a user equipment (UE), may include receiving a configuration indicating a feedback transmission scheme for reporting feedback associated with an error type. The UE may also detect an error in receiving a downlink transmission from a base station, where the detected error is of the error type. Then, the UE may select the feedback transmission scheme for transmitting a negative acknowledgement message for the downlink transmission based at least in part on the detected error being of the error type and the configuration. The UE may also transmit, to the base station, the negative acknowledgement message for the downlink transmission using the selected feedback transmission scheme.

Techniques and examples are described for efficient detection of transmission periods in new radio unlicensed spectrum (NR-U). An apparatus (e.g., a user equipment (UE)) detects, in NR-U, a presence of an indication from a base station of a wireless network. The apparatus, in response to the detection, determines that a transmission opportunity (TXOP) is after the indication. The apparatus then receives, from the base station, a downlink (DL) transmission in NR-U during the TXOP.

A WTRU may be configured to receive, in a first search space (SS) group (SSG), a first downlink transmission. The first downlink transmission may comprise first configuration information associated with power saving and downlink transmission monitoring. The WTRU may be configured to monitor for a second downlink transmission based on the first configuration information. On a condition that the first configuration information indicates a first value, the WTRU may be configured to monitor in the first SSG. On a condition that the first configuration information indicates a second value, the WTRU may be configured to monitor in a second SSG. On a condition that the first configuration information indicates a third value, the WTRU may be configured to skip downlink transmission monitoring in the first SSG for a first interval and monitor in the first SSG. The WTRU may receive the second downlink transmission based on the first configuration information.

Various access network nodes and user equipment capable of operating both semi-persistent scheduling and cell DTX / DRX are disclosed. One disclosed method performed by user equipment (UE) includes the steps of: receiving a first downlink transmission from an access network node; determining that the timing of the procedure related to the first downlink transmission overlaps with an inactive period of cell discontinuous transmission (DTX) / discontinuous reception (DRX) on the access network node; and delaying or stopping the start of the procedure related to the first downlink transmission.