The present invention provides a method and device for transmitting/receiving an uplink signal. When an Scell group including only Scells is set for a user equipment of the present invention and one of the Scells included in the Scell group is set as a cell (hereinafter, “Acell”) in which a PUCCH can be transmitted, UCI of a particular cell group can be transmitted through a Pcell if the particular cell group is a Pcell group having the Pcell and can be transmitted through the Acell of the Scell group if the particular cell group is an Scell group.

A method for communication beam transition in a communication system includes exchanging information between a first communication device and a second communication device on a first communication beam, receiving beam information from the second communication device on the first communication beam, sending from the first communication device a beam switch command on the first communication beam, the beam switch command requesting a transition from the first communication beam to a second communication beam, simultaneously sending information from the first communication device to the second communication device on the first communication beam and the second communication beam, and ceasing sending information from the first communication device to the second communication device on the first communication beam when transition to the second communication beam is completed by the first communication device and the second communication device.

A wireless device and a method performed thereby for communicating with a first network node and a second network node by means of a respective cell thereof are proved. Also a first and second network node and respective methods performed thereby for communicating with a wireless device are provided. The wireless device is in soft handover with at least two cells in its active set where downlink is best from one cell and uplink is best towards another cell, wherein the cell providing the best downlink belongs to the first network node and the cell providing the best uplink belongs to the second network node.

Example embodiments relate to wireless communication devices, methods and systems for beam failure recovery (BFR) in a cell activation procedure. According to an embodiment, a method for cell activation includes receiving, at a terminal device (UE), a first indication from a network to activate a cell configured for the UE, and responsive to the first indication, triggering a beam information reporting for the cell.

Systems, methods, and instrumentalities are disclosed for priority-based channel coding for control information. A wireless transmit/receive unit (WTRU) may sort control information associated with a first control information type into a first control information group and the control information associated with a second control information type into a second control information group, for example, based on respective priorities associated with the first and second control information types. The WTRU may group one or more bits of the first control information group into a first bit level control information group and a second bit level control information group based on priority. The WTRU may selectively apply a cyclic redundancy check (CRC) to the first control information group, the second control information group, the first bit level control information group, and/or the second bit level control information group.

A communication method of the present disclosure comprises transmitting a sounding frame comprising a training signal; and receiving a first feedback frame from a communication partner device, the first feedback frame comprising first beamforming feedback information, wherein the first feedback frame is transmitted together with at least one second feedback frame by multiuser transmission.

A user equipment (UE) may be configured to perform a random access channel (RACH) procedure with a base station. As part of the RACH procedure, the base station may transmit a contention resolution message to the UE. The UE may receive, from the base station, the contention resolution message. The contention resolution message may indicate at least a beam index corresponding to a beam, such as a transmit beam of the base station. The UE may determine whether the beam index is applicable to the UE. The UE may communicate with the base station through the beam corresponding to the beam index when the beam index is applicable to the UE. For example, the UE may send an acknowledgement message to the base station, and the base station and UE may switch to a beam corresponding to the beam index after communication of the acknowledgement message.

A UE may receive, from a base station, a message requesting BSI. The UE may determine a number N of BSI reports to send to the base station, and each BSI report may indicate a beam index corresponding to a beam and a received power associated with the beam. The UE may send, to the base station, N BSI reports based on the message requesting BSI. The UE may receive, from the base station, a set of signals through a set of beams, and determine the received power for each signal of the set of signals received through each beam of the set of beams, each received power may be associated with a beam of the set of beams.

The present disclosure discloses an information feedback method, an apparatus and a storage medium. The method includes: receiving, by a first terminal, N groups of reference signals sent by a second terminal, N being a positive integer, where transmission resources of the reference signals of different groups are in a pattern of time division; selecting, by the first terminal, a target reference signal based on the received N groups of reference signals; and sending, by the first terminal, index information of the target reference signal to the second terminal, where the index information is carried in a feedback channel.

Methods, systems, and devices for wireless communications are described that provide for channel state information (CSI) feedback for multiple discrete Fourier transform (DFT) beams on multiple transmission layers. A user equipment (UE) may report a total number of non-zero power DFT beams across all of the transmission layers. The UE may be configured with a total number of leading beams (K.sub.total) across all of the transmission layers for which to provide high quantization feedback. When the total number of non-zero DFT beams across all the transmission layers exceeds the configured total number of leading beams across all the transmission layers, the UE may report high-resolution quantization feedback for K.sub.total non-zero power precoding coefficients having the highest amplitude coefficients, and may report low-resolution quantization feedback for the remaining non-zero power precoding coefficients. A base station may receive the CSI feedback to determine a precoding matrix.