A dynamic UE capability message specifying a number of beams to be evaluated within different groups of UE TX beam directions associated with different antenna arrays of a UE may be communicated to a transmit receive point (TRP). Each group of UE TX beam directions may include beam directions that are candidates for uplink data transmission. Based on information in the dynamic UE capability message, the TRP can assign SRS resources (for uplink beam management or uplink channel sounding) and/or schedule a multi-layer MIMO uplink transmission in accordance with a UE capability constraint. This may ensure that the SRS resources assignment and/or scheduled multi-layer MIMO uplink transmission is consistent with the UE's beamforming capabilities.

UE-assisted SRS resource allocation

Beam failure recovery (BFR) procedures are described for wireless communications. A base station may send a message to a wireless device during a BFR procedure. The message may comprise one or more BFR configuration parameters and/or reconfigure one or more BFR configuration parameters. The wireless device may stop the BFR procedure, for example, after or in response to receiving the message from the base station. The wireless device may initiate a second BFR procedure using one or more of the BFR configuration parameters received in the message.

Beam failure recovery procedure

Apparatuses, methods, and systems are disclosed for uplink power control. One method includes: receiving a message that configures a set of resources that each includes a downlink resource or an uplink sounding resource and is associated with an uplink transmission beam pattern; receiving scheduling information for an uplink transmission that is associated with a resource of the set of resources; determining an uplink transmission beam pattern associated with the resource; determining a configured maximum output power for the uplink transmission beam pattern that is based on an antenna array property associated with the uplink transmission beam pattern; determining a transmit power for the uplink transmission based on the configured maximum output power; and performing the uplink transmission using the uplink transmission beam pattern based on the transmit power.

Uplink power control

A wireless communication method and a wireless communication device. An electronic device for a first communication device in a wireless communication system includes: storage device configured to store an analog codebook for the first communication device, the analog codebook including a plurality of sets of first configuration parameters for a set of phase shifters of the first communication device; and a processing circuit configured to: perform channel estimation on a first channel from a second communication device to the first communication device respectively based on the plurality of sets of first configuration parameters and signal transmission from the second communication device, select a set of first configuration parameters corresponding to ones of channel estimation results that satisfy a first predetermined condition to generate a reduced analog sub-codebook, configure signal transmission from the first communication device to the second communication device based on the analog sub-codebook.

Wireless communication method and wireless communication device

A wireless device receives a medium access control (MAC) control element (CE) identified by a MAC subheader. The MAC CE comprises: a first field associated with a first cell of a plurality of cells, wherein the first field being set to a first value indicates a command of activation/deactivation of SP CSI reporting on the first cell is present; a semi-persistent channel state information (SP CSI) reporting activation/deactivation indicator; and a SP CSI report trigger field indicating a SP CSI reporting of a plurality of SP CSI reporting on the first cell; In response to the SP CSI reporting activation/deactivation indicator indicating an activation of the SP CSI reporting on the first cell, a SP CSI report for the first cell is transmitted via an uplink control channel.

Activation/deactivation of semi-persistent channel state information report

Some embodiments of this disclosure provide a method performed by one or more transmission points, TRPs, for communicating with a user equipment, UE. In some embodiments, the method includes: using a first transmit, TX, beam to communicate with the UE; receiving, from the UE, information indicating that the UE has determined that the first TX beam has experienced a beam failure; and after the information is received, using a second TX beam to communicate with the UE.

Methods and apparatuses for handling beam failure

Systems and methods of indicating a transmitter configuration for a wireless device are provided. In one exemplary embodiment, a method performed by a wireless device (105, 200, 300a-b, 500) in a wireless communications system (100) comprises receiving (401) a downlink signal that indicates a quasi co-location (QCL) assumption (111), the downlink signal scheduling or triggering a transmission of an uplink signal (113). Further, the method includes transmitting (411), by the wireless device, the uplink signal using a transmitter configuration based on the QCL assumption.

Systems and methods of indicating a transmitter configuration for a wireless device

A method of identifying reference signal resources to be used in a transmission by a wireless device is disclosed. The method comprises a wireless device receiving signaling configuring the wireless device with a plurality of reference signal resource groups, each group comprising a plurality of reference signal resources. The wireless device subsequently receives an indication, in a control channel, of a selection of reference signal resources to be used. Each of the plurality of reference signal resources to be used is selected from a different one of the plurality of reference signal resource groups such that reference signal resources belonging to the same reference signal resource group are not selected for simultaneous use. A reference signal is then transmitted to a network node in the network using the indicated selection of reference signal resources.

Efficient SRS resource indication methods

Some embodiments include a method in a wireless device capable of uplink transmission in a wireless communication network. The wireless device comprises a plurality of antenna ports. The method comprises determining one or more subsets of the plurality of antenna ports. Each subset of antenna ports comprises antenna ports that can be coherently combined to form a precoding of a transmission layer for transmitting from the subset of antenna ports. The method further comprises communicating an indication of the one or more subsets to a network node, and receiving, from the network node, an instruction of a precoding to use for an uplink transmission. The instruction is based on the indicated one or more subsets. The method further comprises precoding an uplink transmission based on the received instruction, and transmitting the transmission to the network node.

Hybrid-SRS Combination Signaling

According to some embodiments, a method is performed by a user equipment for reporting channel state information. The user equipment is configured with two or more channel state information reference signal, CSI-RS, resources in a CSI-RS resource set. The method comprises: selecting at least two CSI-RS resources from the CSI-RS resource set, wherein each of the at least two selected CSI-RS resources are associated to a set of spatially multiplexed layers, wherein different sets comprise different layers;; determining a preferred precoder matrix for the selected CSI-RS resources; and transmitting a CSI report indicating the selected CSI-RS resources and the preferred precoder matrices. The method may further comprise calculating a channel estimate for the selected CSI-RS resources, and determining a channel quality indicator, CQI, corresponding to a hypothetical transmission from a plurality of effective channels where layers transmitted through the effective channels mutually interfere. The CSI report may indicate the determined CQI for the selected CSI-RS resources.

Nilsson Andreas

Papers

Methods and apparatuses for handling beam failure

Systems and methods of indicating a transmitter configuration for a wireless device

Efficient SRS resource indication methods

Hybrid-SRS Combination Signaling

Channel State Information for Reference Signals in a Wireless Communication System