Techniques discussed herein can facilitate reduced density CSI (Channel State Information)-RS (Reference Signals). One example embodiment can be employed at a UE (User Equipment) and can comprise processing circuitry configured to: process one or more configuration messages that comprise one or more configuration parameters for one or more CSI (Channel State Information)-RS (Reference Signal) APs (Antenna Ports) of a reduced density CSI-RS, wherein the one or more configuration parameters indicate a PRB (Physical Resource Block) decimation and a PRB offset; determine a set of REs (Resource Elements) for the one or more CSI-RS APs of the reduced density CSI-RS based on the one or more configuration parameters; measure the reduced density CSI-RS from the set of REs to determine one or more CSI parameters.

Techniques discussed herein can facilitate reduced density CSI (Channel State Information)-RS (Reference Signals). One example embodiment can be employed at a UE (User Equipment) and can comprise processing circuitry configured to: process one or more configuration messages that comprise one or more configuration parameters for one or more CSI (Channel State Information)-RS (Reference Signal) APs (Antenna Ports) of a reduced density CSI-RS, wherein the one or more configuration parameters indicate a PRB (Physical Resource Block) decimation and a PRB offset; determine a set of REs (Resource Elements) for the one or more CSI-RS APs of the reduced density CSI-RS based on the one or more configuration parameters; measure the reduced density CSI-RS from the set of REs to determine one or more CSI parameters.

Methods, systems, and devices for wireless communications are described. A network may generate a pool of distinct base sequences for use with uplink messages from a user equipment (UE) to a base station, where each base sequence in the pool of distinct base sequences may have a peak to average power ratio below a threshold. A base station may assign the pool of distinct base sequences into groups of base sequences based on a group size and a hopping pattern reuse factor. The base station may assign the groups of base sequences to cells and signal the group size and a hopping pattern index to UEs in the cells. A UE in a cell may identify the group of base sequences assigned to the cell based on the signaled parameters and select a base sequence for use in transmitting an uplink message to the base station.

A method comprises communicating, between a base station (112) of a network and a terminal (130), at least one downlink control message (4001) indicative of a plurality of reoccurring resources (202) allocated to a wake-up signal (4003). The method further comprises communicating, between the base station (112) and the terminal (130), the wake-up signal (4003) in at least one resource of the plurality of reoccurring resources (202). The method further comprises in response to said communicating of the wake-up signal (4003), communicating, between the base station (112) and the terminal (130), at least one further signal (4004, 4005).

A method comprises communicating, between a base station (112) of a network and a terminal (130), at least one downlink control message (4001) indicative of a plurality of reoccurring resources (202) allocated to a wake-up signal (4003). The method further comprises communicating, between the base station (112) and the terminal (130), the wake-up signal (4003) in at least one resource of the plurality of reoccurring resources (202). The method further comprises in response to said communicating of the wake-up signal (4003), communicating, between the base station (112) and the terminal (130), at least one further signal (4004, 4005).

A terminal is disclosed including a transmitter that transmits, in an uplink control channel, uplink control information including a 1-bit Hybrid Automatic Repeat reQuest-Acknowledgement (HARQ-ACK) and a positive Scheduling Request (SR) or a negative SR, and a processor that uses a cyclic shift based on a parameter according to higher layer signaling, and based on the uplink control information, in the transmission of the uplink control information, wherein an interval between two cyclic shifts, each based on two values of uplink control information including the positive SR and the 1-bit HARQ-ACK, is π, and an interval between two cyclic shifts, each based on two values of uplink control information including the negative SR and the 1-bit HARQ-ACK, is π. In other aspects, a radio communication method for a terminal is also disclosed.

Provided are a method and a device for transmitting uplink data by using a non-orthogonal code multiple access scheme in a wireless communication system. Specifically, a terminal receives information on a terminal-specific codebook from a base station. The terminal-specific codebook is included in a codebook for a predefined multi-dimensional modulation. The terminal performs multi-dimensional modulation-based encoding on an information bit on the basis of the terminal-specific codebook so as to generate a complex vector. The terminal performs DFT on the complex vector on the basis of the terminal-specific codebook so as to generate a frequency signal. The terminal transmits uplink data generated by performing IFFT on the frequency signal.

According to aspects of the disclosure, there is provided a method for a UE to select or be assigned or configured with a spreading sequence that is based on one or more communication parameters such as receiver type, receiver capability, SE, TBS, MCS, traffic load, PAPR requirement, MCL, number of layers, overloading, reliability requirement, transmission power consumption, number of active UEs, and transmission latency constraint, etc. In some embodiments, the spreading sequence may be related to a performance metric associated with an above parameter (PAPR, BLER, etc.). In some embodiments, this is achieved by associating spreading sequences with parameters or performance metrics, or both. In some instances the spreading sequences may be arranged or ordered in a manner to reduce signaling overhead (e.g., signaling an index is more efficient than signaling a value of a metric, and ordering correlates the index to the value).

Various novel concepts and schemes pertaining to non-orthogonal multiple access for wireless communications are described. A group orthogonal coded access (GOCA) scheme is introduced to reduce multi-user interference (MUI) and improve performance. A repetition division multiple access (RDMA) scheme is introduced to differentiate user equipment (UEs) by different repetition patterns. A low-density spreading (LDS) scheme is introduced to reduce MUI and improve performance.

To appropriately notify UL control information in a future radio communication system, a user terminal includes: a transmitting section that transmits an uplink signal by using a code resource associated with a value of uplink control information; and a control section that controls determination of at least one transmission resource of a time resource, a frequency resource and the code resource used for the uplink signal based on indication information that is notified from a radio base station and indicates at least one resource of the time resource, the frequency resource and the code resource.