This application discloses a data transmission method that includes: scrambling to-be-transmitted data, to obtain scrambled data; and sending the scrambled data to a receive device. The initialization bits of a scrambler used to scramble the data include a first bit sequence and a second bit sequence. The first bit sequence is carried in a service field of the to-be-transmitted data, the second bit sequence reuses a bit in a signal field of a physical layer protocol data unit (PPDU), and the quantity of the initialization bits is equal to the order of the scrambler. In embodiments of this application, when the transmit device and the receive device use the scrambler with a higher order than that in the conventional technology, the initialization bits of the scrambler are based on bits in an existing service field used for data scrambling and reused bits in some signal fields.

An information transmission method and apparatus, and an electronic device are provided. The information transmission method includes: sending first information to at least one second device, where the first information is used to trigger the second device to transmit assistance information or used for performing resource selection or reservation by the second device.

A method and device for two-step random accessing. The method includes transmitting a random access preamble and a data block on a time-frequency resource to a network device; and receiving a response message for the random accessing from the network device. The data block is encoded with an orthogonal cover code and/or a cyclic shift, and the data block comprises data information and a reference signal associated with the data information. Therefore, resource efficiency is improved significantly for an associated data message following a random access preamble with endurable minor performance degradation.

A method for modulating data for transmission within a communication system. The method includes establishing a time-frequency shifting matrix of dimension N×N, wherein N is greater than one. The method further includes combining the time-frequency shifting matrix with a data frame to provide an intermediate data frame. A transformed data matrix is provided by permuting elements of the intermediate data frame. A modulated signal is generated in accordance with elements of the transformed data matrix.

Provided is a transmitter which improves the flexibility of SRS resource allocation without increasing the amount of signaling for notifying the cyclic shift amount. In the transmitter, with regard to each basic shift amount candidate group having a basic shift amount from 0 to N-1, a transmission control unit (206) specifies the actual shift amount imparted to a cyclic shift sequence used in scrambling a reference signal transmitted from each antenna port, said specification being performed based on a table in which cyclic shift amount candidates correspond to each antenna port, and based on setting information transmitted from a base station (100). With regard to basic shift amount candidates for shift amount X, the table differentiates between an offset pattern comprising offset values for cyclic shift amount candidates corresponding to each antenna port and an offset pattern corresponding to basic shift amount candidates of X+N/2.

A method of a base station in a wireless communication system, includes: identifying layer information to which a physical downlink shared channel (PDSCH) for transmission to at least one terminal is mapped, and code division multiplexing (CDM) group information; applying, based on the layer information and the CDM group information, a phase rotation to a demodulation reference signal (DMRS) for the PDSCH; and transmitting, to the at least one terminal, the DMRS to which the phase rotation is applied.

Disclosed are a method and an apparatus for a node used for wireless communication. The first node first receives a first wireless signal in a first time-frequency resource pool, where the first wireless signal carries a first block of bits; next sends first signaling in a second time-frequency resource pool, where the first signaling is used to indicate whether the first block of bits is correctly decoded; then monitors a second wireless signal in a third time-frequency resource pool, where the second wireless signal carries the first block of bits; and when the first signaling indicates that the first block of bits is not correctly decoded, the first node sends second signaling in a fourth time-frequency resource pool by using a first power value.

Disclosed according to various embodiments are a method for transmitting a sidelink signal by a terminal in a wireless communication system supporting a sidelink and an apparatus therefor. The method for transmitting a sidelink signal comprises the steps of: applying scramble codes to data symbols and a DMRS; performing frequency-division multiplexing (FDM) of the data symbols and the DMRS; and transmitting a sidelink signal including the frequency division multiplexed (FDM) data symbols and DMRS, wherein the transmitted sidelink signal is a single sidelink signal selected from a plurality of sidelink signals which are generated by applying the plurality of scramble codes to the data symbols and the DMRS, respectively.

Techniques are described for selecting root pairs for Zadoff-Chu sequences for random access preamble and for signaling one or more values associated with the root pair to a user equipment (UE) by a base station. The described root pair selection methods for two-root physical random access channel (PRACH) preamble can enable the peak differences received at the UE from different frequency offsets (FOs) to be disjointed even considering error in UE side. The selection techniques can improve the performance of PRACH FO and time offset (TO) estimation.

Methods, systems, and devices for increasing transmission capacity of sounding reference signals (SRS) in mobile communication technology are described. An example method for wireless communication includes receiving, by a wireless device from a network node, a configuration comprising A orthogonal code sequences for a sounding reference signal (SRS) resource, wherein each of the A orthogonal code sequences is configured for L adjacent SRS symbols within the SRS resource, wherein L is a length of each of the A orthogonal code sequences, and wherein L and A are positive integers, and transmitting a reference signal that is generated based on the configuration.