Abstract: A soil layer detection drilling device includes a drilling cylinder, and a soil-sampling assembly is provided inside the drilling cylinder. When the soil is drilled, equipment is in a vertical state, a controller is turned on to control a rotary motor to rotate, and the drilling cylinder is driven to drill the soil with the cooperation of drive wheels and a drive belt. Four slide blocks are evenly distributed around an outer circumference of a sliding disk and are matingly connected with slide grooves provided on an inner wall of the drilling cylinder, so when the drilling cylinder rotates, the soil-sampling assembly also rotates. A conical head first in contact with the ground starts to drill the ground, then the drilling cylinder gradually drills into a soil layer, and the drilling cylinder is idled as the drilling cylinder arrives at a certain depth, to clear soil on auger blades.

Abstract: A large-scale tool hoisting device for offshore electric power construction is provided. A steel cable retracted to winches is dried using the heat in the operating cabin, thereby preventing the steel cable from being in a wet state for a long time and being corroded by seawater. For different loads at the terminal of the steel cable, a transmission ratio between a drive wheel and a control wheel is changed through the sliding of the drive wheel. Without changing the rotational speed of the drive motor, the moving speed of the steel cable is effectively and correspondingly improved by reducing the pulling force of the steel cable, or a large pulling force can be provided for the steel cable by reducing the moving speed of the steel cable. The transmission ratio can be changed in the hoisting process.

Abstract: A soil layer detection drilling device includes a drilling cylinder, and a soil-sampling assembly is provided inside the drilling cylinder. When the soil is drilled, equipment is in a vertical state, a controller is turned on to control a rotary motor to rotate, and the drilling cylinder is driven to drill the soil with the cooperation of drive wheels and a drive belt. Four slide blocks are evenly distributed around an outer circumference of a sliding disk and are matingly connected with slide grooves provided on an inner wall of the drilling cylinder, so when the drilling cylinder rotates, the soil-sampling assembly also rotates. A conical head first in contact with the ground starts to drill the ground, then the drilling cylinder gradually drills into a soil layer, and the drilling cylinder is idled as the drilling cylinder arrives at a certain depth, to clear soil on auger blades.

Abstract: A large-scale tool hoisting device for offshore electric power construction is provided. A steel cable retracted to winches is dried using the heat in the operating cabin, thereby preventing the steel cable from being in a wet state for a long time and being corroded by seawater. For different loads at the terminal of the steel cable, a transmission ratio between a drive wheel and a control wheel is changed through the sliding of the drive wheel. Without changing the rotational speed of the drive motor, the moving speed of the steel cable is effectively and correspondingly improved by reducing the pulling force of the steel cable, or a large pulling force can be provided for the steel cable by reducing the moving speed of the steel cable. The transmission ratio can be changed in the hoisting process.

Abstract: A WLAN system resource indication method and apparatus are provided. The method includes: generating, by an access point, a frame that carries resource indication information; and sending, to multiple stations, the frame that carries the resource indication information. The resource indication information includes multiple pieces of sub resource indication information. Correspondingly, each piece of the sub resource indication information uniquely corresponds to one of the multiple stations. Therefore, a station side does not need read the entire resource indication information, so as to reduce resource overheads and improve efficiency.

Abstract: This application provides a communication method and a communication apparatus. In the method, the terminal device receives first indication information, where the first indication information indicates a quantity of bits occupied by second indication information, the second indication information indicates uplink precoding information of P RB sets, each resource block RB set in the P RB sets includes one or more RBs, different RB sets in the P RB sets correspond to different uplink precoding information, and P is greater than or equal to 2; the terminal device receives DCI; the terminal device determines the second indication information in the DCI based on the quantity of bits; and the terminal device sends uplink information based on the uplink precoding information of the P RB sets.

Abstract: Example precoding indication manner determining methods and apparatus are described. One example method includes: A radio access network (RAN) device obtains information about an uplink channel of a terminal device. The RAN device determines a scheduled uplink bandwidth and a quantity of uplink data flows of the terminal device based on the information about the uplink channel of the terminal device. Then, the RAN device determines an uplink precoding indication manner of the terminal device based on the scheduled uplink bandwidth and the quantity of uplink data flows of the terminal device. The RAN device sends first information to the terminal device, where the first information indicates the uplink precoding indication manner.

Abstract: A WLAN system resource indication method and apparatus are provided. The method includes: generating, by an access point, a frame that carries resource indication information; and sending, to multiple stations, the frame that carries the resource indication information. The resource indication information includes multiple pieces of sub resource indication information. Correspondingly, each piece of the sub resource indication information uniquely corresponds to one of the multiple stations. Therefore, a station side does not need read the entire resource indication information, so as to reduce resource overheads and improve efficiency.

Abstract: A data transmission method and a related apparatus. A sending device performs binary phase shift keying BPSK mapping on a to-be-transmitted bit sequence to obtain a first sequence. The sending device performs coding modulation on the first sequence based on a generator matrix or a first sub-matrix including some rows of the generator matrix, to obtain a symbol sequence. The sending device sends the symbol sequence to a receiving device through a channel.

Abstract: A WLAN system resource indication method and apparatus are provided. The method includes: generating, by an access point, a frame that carries resource indication information; and sending, to multiple stations, the frame that carries the resource indication information. The resource indication information includes multiple pieces of sub resource indication information. Correspondingly, each piece of the sub resource indication information uniquely corresponds to one of the multiple stations. Therefore, a station side does not need read the entire resource indication information, so as to reduce resource overheads and improve efficiency.

Abstract: This application discloses communication methods and communication apparatuses. In an implementation, a communication method includes: receiving first information that indicates first group configuration information and second group configuration information, the first group configuration information indicates a correspondence between P reference signal ports and Z layers, and the second group configuration information indicates a correspondence between N frequency domain base vectors and the Z layers; and sending a precoding matrix indicator (PMI) corresponding to the Z layers, where the PMI is determined based on the first information.

Abstract: A modular energy-dissipating fabricated structure for a transmission tower includes a base, two T-shaped beams, a vibration damping mechanism, a connection plate, and four supporting beams. The vibration damping mechanism slides to generate the damping force and energy dissipation. The larger the displacement of the vibration damping mechanism, the greater the damping force provided by the system. This effectively reduces vibration of an upper structure of the transmission tower, and lowers a probability of damaging the upper structure in a natural disaster. The modular energy-dissipating fabricated structure realizes hierarchical control under different loads. Under an action of a dynamic load such as a strong wind, a small sliding range of the vibration damping mechanism can realize vibration damping and energy dissipation purposes of the structure. When a strong dynamic load such as an earthquake is applied to the structure, the vibration damping mechanism reduces an impact on the structure.

Abstract: A WLAN system resource indication method and apparatus are provided. The method includes: generating, by an access point, a frame that carries resource indication information; and sending, to multiple stations, the frame that carries the resource indication information. The resource indication information includes multiple pieces of sub resource indication information. Correspondingly, each piece of the sub resource indication information uniquely corresponds to one of the multiple stations. Therefore, a station side does not need read the entire resource indication information, so as to reduce resource overheads and improve efficiency.

Abstract: Embodiments relate to the field of wireless communication technologies and provide a method for performing channel sounding, a network-side device, and a terminal. A first terminal sends a resource scheduling request to a network-side device when the first terminal starts a communication connection with a second terminal. The resource scheduling request carrying information about the second terminal requests the network-side device to allocate a transmission resource for channel sounding between the first terminal and the second terminal. The first terminal receives a sounding reference signal sent by the second terminal, and obtains information of a channel for communication between the first terminal and the second terminal. The method enables quick and effective channel sounding between terminals, thereby increasing communication efficiency between the terminals.

Abstract: One embodiment of the invention describes a synchronization signal sending method applied to an unlicensed frequency band. To ensure transmission fairness, a network device performs listen before talk (LBT) before a start time for transmitting a synchronization signal, to determine whether a channel is busy or idle. When the channel is busy, the network device cannot transmit the synchronization signal at the expected start time for transmitting the synchronization signal. Therefore, the network device performs LBT again within a preset time length after the start time, and sends the synchronization signal when determining that the channel is idle by performing LBT again. When the channel is idle, the network device preempts a channel resource, and sends the synchronization signal the expected start time for transmitting the synchronization signal.

Abstract: Embodiments of this disclosure disclose an uplink signal transmission method, which comprises: reserving, by a first terminal, a first time interval on an uplink data transmission channel, where the first terminal does not send uplink data within the first time interval, the first time interval is used by a second terminal to perform channel listening before sending a random access preamble, and the first time interval is determined by using one or more of the following parameters: a start moment at which the uplink data transmission channel arrives at a network device, an end moment at which the uplink data transmission channel arrives at the network device, a start moment at which the second terminal performs the channel listening, an end moment at which the second terminal performs the channel listening, duration in which the second terminal performs the channel listening, or an uplink timing advance of the first terminal.

Abstract: A signal transmission method and apparatus, the method including obtaining, by a network device, an end moment of first downlink transmission, where the first downlink transmission occupies at least one of one or more downlink subframes, a downlink transmission part of a self-contained subframe, or a combination of one or more downlink subframes and a downlink transmission part of a self-contained subframe, and performing, by the network device, second downlink transmission in an unlicensed frequency band after a first guard period from the end moment of the first downlink transmission, where at least one terminal device senses a channel in the first guard period, and the second downlink transmission is used to reserve the channel for the at least one terminal device.

Abstract: A WLAN system resource indication method and apparatus are provided. The method includes: generating, by an access point, a frame that carries resource indication information; and sending, to multiple stations, the frame that carries the resource indication information. The resource indication information includes multiple pieces of sub resource indication information. Correspondingly, each piece of the sub resource indication information uniquely corresponds to one of the multiple stations. Therefore, a station side does not need read the entire resource indication information, so as to reduce resource overheads and improve efficiency.

Abstract: The present disclosure discloses a data transmission method, device, and system. The method includes: receiving, by a cooperation device and a target device, to-be-transmitted data sent by a network side device. A first moment is defined as the moment when the target device feeds back, to the network side device, whether the to-be-transmitted data is correctly received is defined as a first moment. Before the first moment, the cooperation device is configured to send the to-be-transmitted data to the target device. And the target device is configured to receive, process and check the to-be-transmitted data sent by the cooperation device before the first moment.

Abstract: Embodiments of this application disclose a communication method, a related device, and a system. The method includes: receiving, by a network device, a first preamble sequence that is sent by a first terminal in a time window; sending, by the network device, a response message to the first terminal based on the first preamble sequence; receiving, by the network device, a first message sent by the first terminal, where the first message includes information used to identify the first terminal; and sending, by the network device, a second message to a second terminal and the first terminal, where the second message is used to indicate that the first terminal and the second terminal belong to a same user equipment cooperative group. According to this application, efficiency of establishing a user equipment cooperative group can be improved.