The teachings herein present a method and apparatus that implement and use a factorized precoder structure that is advantageous in terms of performance and efficiency. In particular, the teachings presented herein disclose an underlying precoder structure that allows for certain codebook reuse across different transmission scenarios, including for transmission from a single Uniform Linear Array (ULA) of transmit antennas and transmission from cross-polarized subgroups of such antennas. According to this structure, an overall precoder is constructed from a conversion precoder and a tuning precoder. The conversion precoder includes antenna-subgroup precoders of size N.sub.T/2, where N.sub.T represents the number of overall antenna ports considered. Correspondingly, the tuning precoder controls the offset of beam phases between the antenna-subgroup precoders, allowing the conversion precoder to be used with cross-polarized arrays of N.sub.T/2 antenna elements and with co-polarized arrays of N.sub.T antenna elements.

Aspects of the present disclosure provide methods and apparatus for selecting beamforming parameters for uplink transmissions based on an uplink reference signal. An example method generally includes identifying one or more parameters for beamformed transmission to a transmit receive point (TRP), transmitting a reference signal using beamforming in accordance with the identified parameters, and receiving, from the TRP in response to the reference signal, signaling for adjusting the one or more parameters for one or more subsequent beamformed transmissions.

A wireless data transmission apparatus is disclosed, comprising one or more antennas for transmitting data as polarised electromagnetic radiation, and polarisation control means for controlling an axial ratio and a tilt angle of the polarised electromagnetic radiation such that the axial ratio and tilt angle conveys information about the data being transmitted. A corresponding wireless data receiving apparatus is also disclosed. In some embodiments, the one or more antennas comprises a patch antenna, and the polarisation means may comprise a mechanism for varying an electrical length of the angled slot. By utilising the tilt angle and axial ratio of polarised electromagnetic radiation to convey information to the receiver, the spectral efficiency of the system can be increased. A further increase in spectral efficiency may be obtained by using the polarisation control means to modulate first and second carrier waves, and transmitting different data on the first and second carrier waves.

The techniques described herein provide procedures at user equipment (UEs) for performing channel state information (CSI) reporting and sounding reference signal (SRS) transmissions based on an ultra-reliable low latency communication (URLLC) block error rate (BLER) target and for reliably receiving PDCCH transmissions. For CSI reporting, a UE may be configured to generate a CSI report based on a BLER target and on received CSI reference signals (CSI-RSs), where the CSI-RSs may be transmitted on one or more groups of quasi co-located antenna ports. For SRS transmissions, a UE may be configured to transmit SRS based on an SRS configuration determined based on a BLER target. For receiving PDCCH transmissions, a UE may be configured to receive and combine DCI received from multiple base stations.

Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may measure, using one or more receive beams, a channel state information reference signal (CSI-RS) transmitted on a transmit beam of the CSI-RS according to a beam management configuration for periodic CSI-RSs, where the UE performs measurements according to a static beam sweeping schedule or a dynamic beam sweeping schedule associated with the transmit beam of the CSI-RS based at least in part on the beam management configuration. In some aspects, the UE may transmit a measurement report indicating one or more measurements of the CSI-RS based at least in part on measuring the CSI-RS. Numerous other aspects are provided.

The present application discloses a method and a device in a node for wireless communications. A node firstly transmits a first characteristic sequence and a target signal; and monitors a first signaling in a first time window; and when the first signaling is detected, demodulates a first signal; a channel occupied by the first characteristic sequence includes a RA-related channel; the target signal comprises a first identifier, while the first signal comprises the first identifier and a second identifier, and CRC comprised in the first signaling is scrambled by a third identifier; the first signaling indicates the first signal; the target signal is used to trigger the first signal; the first identifier and the second identifier are respectively C-RNTIs, and the third identifier is different from the first identifier. This application optimizes the method and device for physical-layer mobility management under beamforming with an intent of improving positioning performance.

A method of mapping and characterizing a communication network is described. Segments are mapped by having each node of the network sending and receiving messages to discover its partner until the network is fully mapped. Each segment is characterized by sample messages sent along each segment, with received signal level at each end of the segment being measured and used to calculate cable segment parameters. Location tags may have their positions estimated by using signal levels at each end of a leaky cable segment receiving the tag signal to estimate the position of location tag.

A user equipment may be configured to implement full duplex transmission configuration indication (TCI) in a unified TCI framework. In some aspects, the user equipment may receive, from a base station, a plurality of TCI states, the plurality of TCI states including a full duplex TCI state corresponding to at least two channels for a first transmission link type and at least one channel for a second transmission link type. Further, the user equipment may apply the full duplex TCI state in accordance with a determined application time.

The present disclosure describes devices, systems, and methods for allocating bandwidth among communication links in a telecommunication system. Some aspects can involve identifying multiple transmission modes used to transmit downlink signals via remote units of a telecommunications system to groups of terminal devices. Each group of terminal devices may receive downlink signals using a respective transmission mode. Respective weights can be assigned to the groups of terminal devices based on the transmission modes. The downlink signals, which are provided to each remote unit associate with each group of terminal devices, can be configured using a respective signal power that is associated with a respective weight for the group of terminal devices associated with the respective remote unit.

A method and a system for downlink pre-coding in cloud radio access networks uses a baseband unit, a number of remote radio heads, and a number of user equipments. The baseband unit determines a received signal expression for each user equipment based on system parameters and channel state information, and determines a sum rate expression which may be achievable for downlink transmission based on the received signal expression. The baseband unit then sets up a constrained optimal problem expression subject to a maximum transmitting power of each remote radio head with an objective function of sum rate maximization based on the achievable sum rate expression, and finally determines optimal solutions for the constrained optimal problem where the optimal solutions comprise downlink pre-coding used for downlink transmission.