Techniques are provided for utilizing positioning reference signals (PRS) in full duplex scenarios. An example method for wireless communication by a user equipment (UE) includes receiving a positioning reference signal in a time slot, wherein the positioning reference signal spans a first frequency bandwidth, transmitting a signal in a second frequency bandwidth during the time slot, wherein the second frequency bandwidth includes frequencies within the first frequency bandwidth, and processing the positioning reference signal received in the first frequency bandwidth excluding the frequencies in the second frequency bandwidth.

This disclosure provides systems, methods and apparatuses for detecting a presence of long training fields (LTFs) in packet extensions of high-efficiency (HE) packets. An apparatus requests a length of packet extensions to be used for a ranging operation. The apparatus receives an HE packet including a packet extension containing a selected number of LTFs based at least in part on the requested packet extension length. The apparatus performs the ranging operation based on a determination that the packet extension contains LTFs. In some aspects, the apparatus detects a presence of LTFs in the packet extension based on a bit provided in the HE packet. In some other aspects, the apparatus detects a presence of LTFs in the packet extension by extracting sequences from the packet extension.

A wireless device receives configuration parameters indicating: a plurality of a channel occupancy time (COT) parameters of a COT of a cell; and a position parameter for the COT of the cell. A downlink control information (DCI) comprising a plurality of fields is received. The position parameter indicates a position of a field, of the plurality of fields. The field indicates a COT parameter, of the plurality of COT parameters. A transport block is transmitted via uplink resources of the COT with the COT parameter.

In the multiple short sequence based SRS, multiple items of sequence data having a short sequence length corresponding to a partial band are used for transmitting SRS in discontinuous bands. In the multiple short sequence based SRS, a terminal specifies a frequency domain to be used for transmitting a reference signal using predetermined sequence data, applies a phase shift index associated with the specified frequency domain to the reference signal, and transmits the reference signal to which the phase shift index is applied by using the specified frequency domain.

A wireless device may receive configuration parameters of cells comprising a primary cell that is not configured with scheduling request (SR) resources and a secondary cell that is configured with SR resources and that is in a secondary timing advance group (sTAG). A wireless device may determine to perform an SR process. Based on the wireless device not having an uplink data channel resource available in a time interval and not having a valid timing advance for the secondary cell in the time interval, the wireless device may initiate a random access procedure.

Provided are a method for indicating reference signal configuration information, a base station and a terminal. The method includes that a first communication node determines joint signaling and the first communication node transmits the joint signaling to a second communication node. The joint signaling includes first information and second information. The first information includes at least one of the following: quasi-colocation configuration information and configuration information of a transmission beam. The second information includes at least one of the following: configuration information of a phase tracking reference signal and configuration information of a demodulation reference signal.

A user equipment (UE) can include processing circuitry configured to decode downlink control information (DCI) from a base station, the DCI including a modulation coding scheme (MCS) index and physical uplink shared channel (PUSCH) allocation. A demodulation reference signal (DMRS) is encoded for transmission to the base station within a plurality of DMRS symbols based on the PUSCH allocation. A phase tracking reference signal (PT-RS) time domain density is determined based on the MCS index and a number count of the DM-RS symbols for the DM-RS transmission. The PTRS is encoded for transmission using a plurality of PT-RS symbols based on the determined time domain density. The plurality of symbols includes one or both of front-loaded DM-RS symbols and additional DM-RS symbols.

Methods, systems, and devices for wireless communications are described. A device (e.g., a base station or a user equipment (UE)) may identify a sequence length corresponding to a number of resource blocks, and select a modulation scheme based on the sequence length. The device may select, from a set of sequences associated with the modulation scheme, a sequence having the sequence length. In some examples, the set of sequences may include at least one of a set of time domain phase shift keying computer-generated sequences or a set of frequency domain phase shift keying computer-generated sequences. The device may generate a reference signal for a data transmission based on the sequence and transmit the reference signal within the number of resource blocks.

This application provides a reference signal generation method, a reference signal detection method, and a communications apparatus, so that a terminal device or a network device can generate a reference signal by using a pseudo-random sequence initial factor c.sub.init provided in embodiments of this application. Compared with a solution in the current technology, the generation manner can support a relatively large quantity of reference signal sequences, to better meet requirements of a plurality of 5G scenarios. The method may include: obtaining a reference signal sequence based on a pseudo-random sequence initial factor c.sub.init; and mapping the sequence to one or more OFDM symbols, where the pseudo-random sequence initial factor c.sub.init is related to a parameter d, d max(log.sub.2(n.sub.ID,max+1)−10,0) or d=max(log.sub.2 (n.sub.ID,max+1)−12,0), max represents that a larger value is selected from two values, and n.sub.ID,max represents a maximum value of a reference signal sequence ID.

Provided is a radio communication base station device which can suppress a use amount of an SRS communication resource. In this device, a correlation rule setting unit (102) sets a rule for correlating a preamble with an SRS transmission time interval so that the preamble transmission time band and the SRS transmission time band are in the same transmission time band. An SRS transmission band decision unit (103) decides a time interval of a transmission time band which can transmit the SRS according to the preamble transmission time interval inputted from a preamble transmission band decision unit (101) and the correlation rule setting unit (102).