Abstract: A mechanical-model based earthquake-induced landslide hazard assessment method in earthquake-prone mountainous area includes: obtaining the cohesion and internal friction angle through a geological map of the study area and a geotechnical physical parameter; obtaining simulated ground motions by combining a pulse-like ground motion effect model and a pulse-like ground motion response model; calculating slope permanent displacement according to the simulated ground motions, the cohesion, the internal friction angle and other parameters; obtaining a statistical relationship between the permanent displacement and a landslide probability according to permanent displacement data derived from historical earthquake-induced landslides and historical strong earthquake records; and predicting earthquake-induced landslide probability according to the slope permanent displacement and the statistical relationship between the permanent displacement and the landslide probability, and quantitatively evaluating earthquake-ind

Abstract: An inverse pseudo fully-differential amplifier having a common-mode feedback control circuit and a method for maintaining a stable output common-mode level are provided. The inverse pseudo fully-differential amplifier includes the pseudo fully-differential operation circuit and a common-mode feedback control circuit. The pseudo fully-differential operation circuit includes inverter amplifiers (2) and (3). The inverter amplifiers (2) and (3) respectively have a first feedback control terminal and a second feedback control terminal. Input terminals of the common-mode feedback control circuit are respectively connected with output terminals of the inverter amplifier (2) and (3), and are configured to detect common-mode output voltages of the inverter amplifier (2) and (3).

Abstract: An ultra-low power consumption power supply structure, comprising: a first LDO circuit, a second LDO circuit, a first Bandgap module, a second Bandgap module and a switching circuit, wherein the first LDO circuit is used for providing an LDO output voltage when an SOC chip is in a normal operating mode, and the second LDO circuit is used for providing an LDO output voltage when the SOC chip is in an ultra-low power consumption mode; the first Bandgap module is used for providing, based on a main power supply voltage, a first reference voltage for the first LDO circuit at the time of power-on startup, and the second Bandgap module is used for providing a second reference voltage for the second LDO circuit after power-on startup is completed; and the switching circuit is used for switching the mode in which the first reference voltage is output by the first Bandgap module at the time of power-on startup to the mode in which the second reference voltage is output by the second Bandgap module after power-on start

Abstract: A sector level sweep method and apparatus are provided. A local end generates a first sector sweep packet at the local end sector sweep stage, and the local end sends the first sector sweep packet to a peer end by using a first beam. A quantity of bytes of the first sector sweep packet is not greater than 27, the first sector sweep packet includes beam indication information of the first beam, the beam indication information includes antenna identification information of the beam, and a maximum quantity of antennas indicated by the antenna identification information is at least 8.

Abstract: An ultra-low power consumption power supply structure, comprising: a first LDO circuit, a second LDO circuit, a first Bandgap module, a second Bandgap module and a switching circuit, wherein the first LDO circuit is used for providing an LDO output voltage when an SOC chip is in a normal operating mode, and the second LDO circuit is used for providing an LDO output voltage when the SOC chip is in an ultra-low power consumption mode; the first Bandgap module is used for providing, based on a main power supply voltage, a first reference voltage for the first LDO circuit at the time of power-on startup, and the second Bandgap module is used for providing a second reference voltage for the second LDO circuit after power-on startup is completed; and the switching circuit is used for switching the mode in which the first reference voltage is output by the first Bandgap module at the time of power-on startup to the mode in which the second reference voltage is output by the second Bandgap module after power-on start

Abstract: A training packet sending method and apparatus, where the method includes generating, by a first device, a training packet, where the training packet includes a preamble, a header, and a training field, and the header includes at least a legacy header, and repeatedly sending, by the first device, the preamble using N channels, sending the legacy header in the header using the N channels, and sending the training field to at least one second device using H channels of the N channels, where N is greater than 1, and H is greater than 1 and less than or equal to N.

Abstract: A training packet sending method and apparatus, where the method includes generating, by a first device, a training packet, where the training packet includes a preamble, a header, and a training field, and the header includes at least a legacy header, and repeatedly sending, by the first device, the preamble using N channels, sending the legacy header in the header using the N channels, and sending the training field to at least one second device using H channels of the N channels, where N is greater than 1, and H is greater than 1 and less than or equal to N.

Abstract: Example methods and devices for sending a beam refinement protocol packet are provided in this application, which support a transmission format of multi-channel transmission and multi-antenna transmission. One example method for sending a beam refinement protocol packet includes determining a transmission format of a beam training (TRN) subfield by a first device based on first information. The first information includes information indicating a quantity of transmit chains used for transmitting the TRN subfield on each channel and information indicating a channel aggregation mode. The first device sends a beam refinement protocol packet to a second device on a transmit chain based on the transmission format, where the beam refinement protocol packet includes a data field and a TRN field, and the TRN field includes a plurality of TRN subfields.

Abstract: A signal sending method includes generating, by a first device, at least one first signal based on an ith set of parameters in a first parameter, sending, by the first device, the at least one first signal to a second device on an unlicensed carrier, generating, by the first device, at least one second signal based on a jth set of parameters in a second parameter, and sending, by the first device, the at least one second signal to the second device on a licensed carrier, where N1i, N2i, N3i, N4j, N5j, N6j, I, and J are all integers, N1i×N3i is greater than or equal to 1.512 gigahertz (GHz), wherein the maximum value of N1i is greater than N4j (max(N1i)?max(N4j)), and wherein the maximum value of N3i is less than N6j (max(N3i)?max(N6j)).

Abstract: The invention provide a control method, including: obtaining a time division scheme of a STA in a next cruise monitoring period, where the next cruise monitoring period includes N adjustment periods and N monitoring periods determined by means of division according to N preset points; configuring control information according to the time division scheme, where the control information is for controlling an operating status of the STA in each adjustment period in the next cruise monitoring period; and sending the control information to the STA.

Abstract: Examples of the present disclosure provide a channel access period allocation method. The method includes: receiving, by an access point (AP), first information sent by a first station (STA) for requesting a dynamic service period (DSP) from the AP; and sending, by the AP, second information to the first STA to instruct the first STA to send a data frame to the AP in a first DSP, where a start time of the first DSP falls within a first preset time period following an end time of an SP of the first STA, and the first DSP requested by the first STA is pre-allocated to a second STA having a priority that is lower than that of the first STA, where a time delay of the first STA for sending the data frame to the AP satisfies a time delay requirement of a quality of service QoS in the first preset time period.

Abstract: A sector level sweep method and apparatus are provided. A local end generates a first sector sweep packet at the local end sector sweep stage, and the local end sends the first sector sweep packet to a peer end by using a first beam. A quantity of bytes of the first sector sweep packet is not greater than 27, the first sector sweep packet includes beam indication information of the first beam, the beam indication information includes antenna identification information of the beam, and a maximum quantity of antennas indicated by the antenna identification information is at least 8.

Abstract: This application provides example beamforming (BF) training methods, receiving devices, and sending devices. One example method includes performing BF training on at least one channel with a first device based on BF training request information, where the BF training request information includes antenna configuration information of the BF training and channel configuration information of the at least one channel. First feedback information sent by the first device is received, where the first feedback information includes a measurement result of the BF training, information about an antenna corresponding to the measurement result, beam information of the antenna, and channel information corresponding to the antenna. At least one of an optimal antenna configuration or digital domain BF precoding information on the at least one channel is determined based on the first feedback information.

Abstract: A beamforming training method and apparatus relating to the field of beamforming training technologies, where the beamforming training method includes sending, by a first device, first indication information to a second device, where the first indication information indicates the second device not to perform an initiator sector sweep (ISS), sending, by the first device, a sector sweep frame of a responder sector sweep (RSS) to the second device, and receiving, by the first device, feedback information obtained by the second device during the RSS. Hence, beamforming training flexibility can be improved.

Abstract: The present application discloses a reference signal configuration method, including: generating a reference signal, where the reference signal includes a first part and a second part, the first part and the second part have a same length, and a sum of a DC component of the first part and a DC component of the second part is zero; generating an enhanced directional multi-gigabit EDMG packet including the reference signal; and sending the EDMG packet. Embodiments of the present application further provide a reference signal configuration apparatus. According to the embodiments of the present application, a reference signal with a zero DC component can be obtained, thereby facilitating channel estimation that is based on CE.

Abstract: The present invention discloses a method for truncating a service period, a network controller, and a station. The method includes: determining allocation control information of an service period, where the allocation control information includes a truncation indication and a truncation type indication; and sending the allocation control information to a station, so that the station uses the service period to perform communication, and truncates the service period according to a truncation type indicated by the truncation type indication when the service period is surplus and the truncation indication indicates that the service period can be truncated. According to the method for truncating a service period, the network controller, and the station in embodiments of the present invention, interference to communication after the service period is truncated can be reduced.

Abstract: The present invention discloses an apparatus and a method for scheduling a timeslot. The apparatus includes: a first acquiring module, configured to acquire first interference information; a second acquiring module, configured to acquire second interference information; a third acquiring module, configured to acquire timeslot scheduling information of a link of the at least one second BSS, where the timeslot scheduling information is used to indicate information about a scheduled timeslot of the link of the at least one second BSS; and a scheduling module, configured to schedule a timeslot for a link of the first BSS according to the first interference information, the second interference information, and the timeslot scheduling information. According to the apparatus and the method for scheduling a timeslot in embodiments of the present invention, interference to a link of another network can be avoided actively, and a timeslot can be scheduled properly.

Abstract: A multi-transceiver configuration method, a multi-transceiver channel multiplexing method, and an apparatus are disclosed. The multi-transceiver configuration method includes: an access point obtains maximum data transfer rates Ri(n) of N terminals STAis on sub-channels n in a specified sub-channel combination, where 1?i?N, and N is a positive integer greater than 1; and calculates a channel access time Ti(n) required by the STAi for transmitting an average data volume on the sub-channel n, and when the specified sub-channel combination manner meets an allocation requirement of the N STAis, the access point configures at least one transceiver for each sub-channel n in the specified sub-channel combination.

Abstract: A training packet sending method and apparatus, where the method includes generating, by a first device, a training packet, where the training packet includes a preamble, a header, and a training field, and the header includes at least a legacy header, and repeatedly sending, by the first device, the preamble using N channels, sending the legacy header in the header using the N channels, and sending the training field to at least one second device using H channels of the N channels, where N is greater than 1, and H is greater than 1 and less than or equal to N.

Abstract: A beam refinement method and a communications device, where the method includes determining, by a first device, a format of an enhanced Beam Refinement Protocol (eBRP) packet, where the eBRP packet includes a training field, the training field includes an eBRP channel estimation (eBRP-CE) sub-field and an eBRP training (eBRP-TRN) sub-field, and a ratio of a quantity of Gray codes composing the eBRP-CE sub-field in the training field to a quantity of Gray codes composing the eBRP-TRN sub-field in the training field is less than 9:20, and sending, by the first device, the eBRP packet to a second device based on the determined format of the eBRP packet. Hence, an effective proportion of the eBRP-TRN sub-field in the training field can be increased such that more Antenna Weight Vector (AWV) configurations can be attempted within a same period of time.