Systems, methods, and apparatus are provided for automated identification of baseline data and changes in state in a wireless communications spectrum, by identifying sources of signal emission in the spectrum by automatically detecting signals, analyzing signals, comparing signal data to historical and reference data, creating corresponding signal profiles, and determining information about the baseline data and changes in state based upon the measured and analyzed data in near real time, which is stored on each apparatus or device and/or on a remote server computer that aggregates data from each apparatus or device.

A method for transmitting data, applicable to a data transmitting end with a plurality of unlicensed channel resources, includes: determining a first unlicensed channel resource which is idle from the plurality of unlicensed channel resources; setting the first unlicensed channel resource as a first working channel resource for data transmission; and transmitting data over the first working channel resource.

Embodiments of the present invention provide a control channel position determining method, a device, and a processor-readable storage medium. A terminal device determines an available unlicensed band set and a control channel resource group, and determines at least one first unlicensed band to which at least one of control channel resource groups belongs, based on bitmap information or offset information. The at least one first unlicensed band belongs to the available unlicensed band set. Compared with that a control channel resource group is semi-statically configured to belong to a first unlicensed band, according to the embodiments of the present invention, no matter how an available unlicensed band included in an available unlicensed band set changes, a first unlicensed band to which at least one control channel resource group belongs can always be determined, thereby ensuring normal communication.

A signal transmission method and a network device are provided. The method is applied to the network device and includes: performing LBT for a channel in an SSB transmission direction before a transmission of an SSB in an unlicensed band; and transmitting the SSB when the channel is detected as idle.

Methods, systems, and devices for wireless communications are described. A transmitting user equipment (UE) such as a vehicle may identify data for transmission and transmit a request message to one or more receiving UEs (e.g., other vehicles). The request message may be associated with a first priority. The transmitting UE may monitor resources for a response message. The response message may be associated with a second priority. If the transmitting UE receives a response message, the transmitting UE may determine whether to transmit the data based on a comparison of the priorities of the request message and the response message. In some cases, the transmitting UE may transmit the data if the transmitting UE does not receive any response message. A receiving UE may receive the request message and determine whether to transmit a response message based on the priority and/or the receive power of the request message.

Disclosed is a method, device, apparatus for transmitting and receiving a request signal, comprising: a base station determines a channel occupancy request signal to be transmitted, the channel occupancy request signal being a request signal for requesting channel occupancy to a terminal after the base station executes a listen-before-talk operation on the direction corresponding to at least one beam; the base station schedules transmission of the channel occupancy request signal on a downlink control channel; the terminal detects the downlink control channel that schedules the transmission of the channel occupancy request signal; and the terminal receives the channel occupancy request signal according to a detection result. The use of the present invention overcomes a defect of the prior art that has no design for the channel occupancy request signal, and implements transmission of an eNB channel occupancy request signal. Furthermore, the solution further provides a solution that can achieve the lowest power consumption.

A method and apparatus for modulating/demodulating an FSK signal capable of overcoming a trade-off relationship between a modulation index and a spectral efficiency are disclosed. An apparatus for modulating/demodulating a frequency deviation keying (FSK) signal includes a channel selection-modulator, a phase locked loop, and an output unit. The channel selection-modulator modulates an FSK signal by setting a frequency channel to be used. The phase locked loop generates a desired output frequency ‘fout’ compared to a reference frequency ‘f.sub.REF’ by adjusting a frequency division ratio (N+n) with respect to a frequency of the modulated FSK signal. The output unit amplifies the FSK signal having the generated output frequency ‘fout’ and radiating the amplified FSK signal through an antenna. Here, each of the frequency channels is divided into two or more tones, and different frequency channels are allocated between the tones divided into two or more tones.

Methods, systems, and devices for wireless communications are described. Generally, the described techniques provide for efficiently selecting resources for sidelink communications in a shared spectrum while allowing other user equipment (UEs) a chance to gain access to the shared spectrum. In one aspect, a UE may transmit sidelink data to another UE in accordance with a frequency hopping pattern to randomize interference and improve throughput. According to some aspects, the first UE may transmit the sidelink data on a first set of interleaved frequency resources in a first time interval and a second, different set of interleaved frequency resources in a second time interval. In another aspect, a UE may rely on feedback from other UEs to determine when reserved resources are released, and the UE may use the released resources for sidelink communications.

Aspects are provided which improve LBT by associating contention windows with transmission burst lengths and by allowing contention windows and maximum burst lengths to be adjusted based on interference activity. For downlink, a UE receives a PG for a downlink transmission from a base station indicating a CCA length based on a contention window size associated at least with a burst length for the downlink transmission. The UE performs, after receiving the pre-grant, a CCA based on the CCA length, transmits an APG to the base station when the CCA is successful, and receives the downlink transmission in response to the APG. For uplink, the base station performs a CCA based on a contention window associated at least with a burst length for an uplink transmission, transmits an uplink grant to the UE when the CCA is successful, and receives the uplink transmission in response to the uplink grant.

Methods, systems, and devices for wireless communications are described. A user equipment (UE) may receive a plurality regulation requirement parameters corresponding to an unlicensed carrier, where the unlicensed carrier spans at least a portion of a first unlicensed band associated with a first set of regulation requirements and at least a portion of a second unlicensed band associated with a second set of regulation requirements. The UE may identify, from the plurality of regulation requirement parameters, a set of regulation requirement parameters for an uplink transmission based at least in part on whether a set of frequency resources for the uplink transmission overlaps with the first unlicensed band and the second unlicensed band. The UE may transmit the uplink transmission using the set of regulation requirement parameters.