Wireless communications systems and methods related to performing subband-based random access and/or subband-based scheduling request in a network are provided. A first wireless communication device receives a communication configuration indicating one or more subbands for transmitting a signal including at least one of a random access preamble sequence or a scheduling request. The first wireless communication device performs a clear channel assessment (CCA) on each subband of the one or more subbands. The first wireless communication device transmits the signal using at least one subband of the one or more subbands based on a result of the CCA.

Apparatuses, methods, and systems are disclosed for communicating scalar information that indicates frequency locations. One apparatus includes a processor that determines a first frequency location, determines a second frequency location, and determines a first scalar and a second scalar based on the first and second frequency locations. The apparatus includes a transceiver that transmits information of the first scalar and the second scalar.

The disclosure relates to performing phase compensation at a transmitter. A processing device for a network access node generates a phase compensated modulation symbol based on at least one first modulation symbol and at least on one of a frequency offset parameter and a time offset parameter. The frequency offset parameter may be determined based on an offset between a reference frequency f0 and a DC (0 Hz) frequency such that the frequency offset parameter corresponds to the reference frequency f0. Also, the reference frequency f0 can be at least partly based on the carrier of up-conversion frequency used by the processing device and the reference frequency f0 can be the carrier for up-conversion frequency. The phase compensated symbol is transmitted to a receiver, such as a client device. Furthermore, the disclosure also relates to corresponding methods and a computer program.

An access point manages a first wireless local area network (WLAN) in a 6 GHz radio frequency (RF) band and ii) a second WLAN operating in another RF band. The access point generates a physical layer (PHY) data unit to include a management frame having i) first information indicating first network parameters of the first WLAN, and ii) second information indicating second network parameters of the second WLAN. The AP transmits the PHY data unit in the other RF band to provide, to any client stations that are operating in the other RF band and that are also capable of operating in the 6 GHz band: the first information indicating the first network parameters of the first WLAN operating in the 6 GHz RF band to assist the any client stations that are operating in the other RF band with joining the first WLAN operating in the 6 GHz RF band.

A method of transmitting a discovery reference signal (DRS) by a base station in a wireless access system supporting an unlicensed band, includes transmitting the DRS in a DRS occasion via the unlicensed band, wherein the DRS includes a secondary synchronization signal (SSS), wherein the DRS is transmitted in a subframe (SF) among SF #1, SF #2, SF #3, SF #4, SF #6, SF #7, SF #8, and SF #9, and wherein the SSS is generated based on a SSS sequence related to a SF number where the DRS occasion occurs.

The present disclosure relates to a communication technique of fusing a 5G communication system for supporting higher data transmission rate beyond a 4G system with IoT technology and a system thereof. The present disclosure may be applied to intelligent services (e.g., smart home, smart building, smart city, smart car or connected car, health care, digital education, retail business, security and safety related service, or the like) based on the 5G communication technology and the IoT related technology. The present disclosure discloses a method and an apparatus for transmitting/receiving a random access channel (RACH) according to beam reciprocity (beam correspondence) with a method and an apparatus for supporting various services.

In one embodiment, an apparatus comprises: a baseband processor having a preamble generation circuit to generate a preamble for an orthogonal frequency division multiplexing (OFDM) transmission, the preamble generation circuit to generate the preamble having a first portion comprising a first plurality of symbols and a second portion comprising a second plurality of symbols, where the preamble generation circuit is to generate at least some of the second plurality of symbols having at least one frequency disruption between successive symbols of the second portion; a digital-to-analog converter (DAC) coupled to the baseband processor to convert the first plurality of symbols and the second plurality of symbols to analog signals; a mixer coupled to the DAC to upconvert the analog signals to radio frequency (RF) signals; and a power amplifier coupled to the mixer to amplify the RF signals.

Embodiments of efeMTC synchronization signals for enhanced cell search and enhanced system information acquisition are described. In some embodiments, an apparatus of a base station (BS) is configured to generate a length-x sequence for an efeMTC synchronization signal, the length-x sequence configured for repetition in frequency domain within 6 physical resource blocks (PRB). In some embodiments, to generate the length-x sequence, the BS may be configured to select any one index of the set of root indices {1, 2, 63}, excluding the root indices 25, 29 and 34, to correspond to a different physical-layer cell identity (PCID). In some embodiments, the BS may be configured to encode RRC signaling to include a System Information Block (SIB) comprising configuration information for transmission of the efeMTC synchronization signal, and transmit the length-x sequence as the efeMTC synchronization signal in frequency resources according to the SIB.

The present invention is designed to perform UL transmission using a transmission format suitable for content-based uplink (UL) transmission. A user terminal according to the present invention has a transmission section that transmits UL data without UL grants from a radio base station, and a control section that controls transmission of the UL data according to a transmission format, and the transmission format is comprised of an access channel for transmitting a randomly-selected preamble, a control channel for transmitting control information for the UL data, and a data channel for transmitting the UL data.

New sequences have been proposed and/or adopted for short Physical Uplink Control Channel communications between base stations and UEs. In an exemplary embodiment, a UE communicates with a base station based on sequence groups that include the new sequences, where the new sequences are allocated to different sequence groups based, at least in part, on correlations with other existing sequences included in individual sequence groups.