76results about How to "Increase coverage distance" patented technology

The invention discloses a control channel transmission method and device comprising: a base station indicates to a terminal whether a physical downlink control channel of the terminal adopts serial transmission, when the serial transmission is adopted, sends multiple physical downlink control channels to the terminal in continuous multiple sub-frames and completes one resource distribution to the terminal via the multiple physical downlink control channels. The control channel transmission method of the invention can make UE obtain time selectivity gain and coding combination gain by adopting the serial transmission, can improve flexible degree of PDCCH resource occupation and can raise the resource utilization rate to improve the covering distance of PDCCH in order to enhance receiving property of PDCCH.

The present invention provides a self-powered multi-parameter water quality monitor based on NB-IOT, including a main control chip, a NB-IOT communication module, a multi-parameter water quality detection module and a self-power supply device for providing power, and the main control chip is respectively Connected with the NB-IOT communication module and the multi-parameter water quality detection module; the main control chip outputs a parameter detection instruction to the multi-parameter water quality detection according to the operation instruction sent by the cloud received by the NB-IOT communication module module, processing the water quality detection result returned by the multi-parameter water quality detection module and uploading it to the cloud through the NB-IOT communication module.

Embodiments of the invention provide a method and an apparatus for device-to-device communication. The method and the apparatus are applied to a chain communication network. The chain communication network includes multiple master control nodes, each master control node and surrounding slave nodes thereof constitute a corresponding star network, and each master control node is used as a node in the chain communication network and is used to realize a multi-hopping function. The method comprises the following steps: the master control node of the current hop controls communication between any two slave nodes in the current star network corresponding to the master control node of the current hop; and the master control node of the current hop communicates with the master control node of next hop. By adopting the method and the apparatus provided by the embodiments of the invention, the coverage of the communication network can be increased.

The invention belongs to the technical field of high-temperature component cooling of an air turbine, in particular to an air film hole based on secondary flows of a bent passage, which comprises two parts: a bent passage section and a straight passage section, wherein the bent passage section is a circular arc and is formed by bending an air film hole inlet in the air flow incoming direction. Because of the bent passage of the air film hole, on one hand, cooling air flows generate secondary flowing by an air film, formed passage vortexes are bent through the transverse pushing of high-temperature air flows after leaving the air film hole, the rotation direction opposite to kidney-shaped vortexes is realized, the development of the kidney-shaped vortexes can be inhibited after the interaction, the strength of the kidney-shaped vortexes is weakened, the attaching capability of the air film to the wall surface is improved, and the air film cooling efficiency is improved. On the other hand, because of the existence of the passage vortexes, the cooling air flows have higher expansion speed at the outlet part of the air film hole, and the coverage width of the air film can be increased.

The invention discloses a microwave remote wireless covering system and method. In which, the system comprises: a microwave accessing unit for receiving a radio-frequency signal from base station, converting into microwave signal, sending out through a microwave transmission unit, receiving the microwave signal from the microwave transmission unit, converting into radio-frequency signal and transmitting to the base station; a microwave transmission unit for performing microwave signal space transmission; and a microwave remote unit for receiving the microwave signal from microwave transmission unit, converting into radio-frequency signal, sending out to performing area covering, receiving radio-frequency signal from mobile station, converting into microwave signal and sending out through the microwave transmission unit; The microwave remote wireless covering system in the invention adopts microwave as transmission medium, can effectively reduce equipment cost, reduce engineering construction complexity, and greatly increase repeater networking flexibility and communication reliability; At the same time, the invention can effectively extend base station covering distance while guarantees that the normal work of the base station is not influenced.

The invention relates to a WIA-PA based wireless gateway which comprises a power supply module, a digital filter and a gateway core board, wherein the digital filter and the network core board are connected with the power supply module, and the digital filter which is connected with an antenna is connected with the gateway core board. A communication method of the WIA-PA based wireless gateway comprises the steps that when data is received, the network core board sends a command to the digital filter via a serial port, the digital filter configures a reception channel according to the command and receives an RF signal via the antenna, the RF signal is filtered and then stored in a FLASH via a modem and converted into data of TCP/IP protocols via a CPU, and the data is transmitted via a network port; and when data is sent, the network core board modulates a digital signal into the RF signal and transmits the RF signal to the digital filter, an emission link in a narrowband filtering and amplification unit is powered on via a trigger signal of the modem, and the data is sent via the antenna. According to the WIA-PA based wireless gateway and the communication method thereof, interference signals in the 2.4GHz free frequency range as WLAN can be effectively filtered, the data reception sensitivity is improved, and the transmission distance is increased.

The invention relates to a dipole antenna comprising the following units: a first radiator with the length equal to 1/4 wavelength of a corresponding preset frequency; a second radiator with the length equal to 1/4 wavelength of a corresponding preset frequency, wherein the second radiator and the first radiator form a first sub dipole antenna; a third radiator with the length equal to 1/2 wavelength of a corresponding preset frequency, wherein the first and third radiators are respectively arranged on two sides of the second radiator, the third and second radiators are connected in series to form a second sub dipole antenna, and the signal phases transmitted by the third and second radiators are stacked in the same direction. The first and second radiators form the first sub dipole antenna; the third radiator and the second radiator are connected in series, and signal phases transmitted by the two radiators are stacked in the same direction, thus increasing the signal intensity without being mutually cancelled, and forming a half-wavelength dipole antenna; two dipole antennas are stacked, so the antenna gain is obvious, thus enhancing the coverage distances.

The invention discloses a directional pattern reconfigurable antenna, a directional pattern reconfigurable method and a wireless terminal device. The directional pattern reconfigurable antenna includes a PCB and an array antenna arranged on the PCB. The array antenna is formed by multiple antenna subunits, and each subunit is connected to a radio frequency switching circuit via radio frequency signal sub-links. The radio frequency switching circuit is connected to a radio frequency processing unit, and the radio frequency switching circuit is used for controlling gating or closing of each antenna subunit according to switch gating control signals transmitted by the radio frequency processing unit so that the array antenna operates in a specific working mode. The invention has the followingadvantages: dynamical adjusting of a wireless coverage area can be realized, coverage distances can be increased, the received signal strength at user terminals can be enhanced, the communication quality can be improved, etc.

The invention relates to a radio frequency system and communication equipment. The radio frequency system comprises a radio frequency transceiver, a first transceiving circuit, a second transceiving circuit and a diversity receiving circuit, wherein the first transceiving circuit and the diversity receiving circuit are configured to be connected with a first antenna and a second antenna in a switchable mode; the second transceiving circuit is configured to be connected with a third antenna; the diversity receiving circuit is configured to be connected with a fourth antenna; the first transceiving circuit supports emission and main set receiving of low-frequency signals; the second transceiving circuit supports emission and main set MIMO receiving of the low-frequency signals; and the diversity receiving circuit supports diversity receiving and diversity MIMO receiving of the low-frequency signals. Therefore, the radio frequency system can support double-path emission and a 4 * 4 MIMO function of the low-frequency signals; and when the radio frequency system is located in weak signal environments such as an edge of a community, a deep position of a building and an elevator, compared with a radio frequency system which can only support 2 * 2 MIMO receiving of the low-frequency signals in a related technology, the radio frequency system can double diversity gains, can double a coverage distance, and can greatly improve the receiving performance.

The present invention relates to the field of wristbands, in particular to an intelligent tamper-resistant bracelet, which includes an alarm circuit, a waterproof central shell, a first wristband, a second wristband, a buckle seat connected to the end of the first wristband, and a second The buckle head at the end of the second wristband, the alarm circuit includes the first alarm circuit buried in the first wristband, the second alarm circuit buried in the second wristband, and the controllable alarm signal set in the waterproof center shell. The alarm circuit board is equipped with a metal wiring pin in the buckle seat, and a metal wiring hole is buried in the buckle head. The wiring hole, the first alarm circuit, the metal wiring pin, the metal wiring hole, the second alarm circuit and the alarm circuit board are connected in sequence to form a closed circuit. After the smart anti-demolition bracelet is put on for the first time, if any part of the intelligent anti-demolition bracelet is broken, the anti-demolition alarm circuit board in the intelligent anti-demolition bracelet can be triggered to send an alarm signal.

The invention provides an information sending method and a terminal. The method comprises the following steps: determining a first sending resource for scheduling SA signaling and a second sending resource for data DATA in to-be-sent information, wherein the frequency band where the first sending resource is located is lower than or equal to the frequency band where the second sending resource islocated; and sending the to-be-sent information according to the first sending resource and the second sending resource. The method can solve the problems that in a V2X communication protocol in the prior art, SA and data are usually sent on one frequency band, the bandwidth is insufficient when low-frequency-band frequency domain resources are adopted, the coverage performance of high-frequency-band frequency domain resources is limited, and the high data transmission rate and the high coverage range and coverage distance of SA cannot be guaranteed at the same time.

The invention relates to a mining 5G base station radio frequency energy loss optimization method and device. The optimization method comprises the following steps: selecting a coaxial cable model, and obtaining an attenuation coefficient and a diameter ratio parameter; determining the geometrical relationship between the length and the bending angle of the coaxial cable after the coaxial cable is installed and bent according to the roadway condition; and determining the bending angle and length when the attenuation is weakest based on the relationship between the mismatch coefficient and the angle, wherein the geometric relationship between the mounting of the mining 5G communication antenna and the base station in the roadway and the coaxial cable for realizing the connection is an isosceles triangle. The length of two equal sides of the isosceles triangle is half of the length of the coaxial cable, and the vertex angle of the isosceles triangle is the bending angle of the coaxial cable. Therefore, the emission efficiency of the radio frequency energy of the 5G base station can be improved, the coverage distance of the 5G base station can be improved, the layout number of the 5G base station can be reduced, and the construction cost can be reduced.

An actuator having a simple configuration requiring no high dimensional accuracy, high in positioning accuracy and low in cost, and a head-positioning mechanism using the actuator are disclosed. An actuator according to a first application comprises a shear-type piezoelectric element of predetermined thickness and an opposed electrode formed on two electrodes in spaced relationship on a base member. The opposed electrode is displaced in accordance with the direction of polarization of the shear-type piezoelectric element upon applying a voltage between the two electrodes. The opposed electrode thus constitutes an operating section of the actuator. An actuator according to a second application comprises a movable member arranged on a drive member including a shear-type piezoelectric element on a base member. The drive member includes a plurality of layers of piezoelectric elements polarized in alternately opposite directions perpendicular to the thickness of the devices. A plurality of conductive layers are formed adjacently to the respective layers of the devices to permit voltage application thereto. The movable member can be driven in parallel to the base member upon application of a voltage between the conductive layers. Any one of these actuators can be incorporated as a part of the head actuator to constitute a head-positioning mechanism capable of displacing the head by a minuscule distance independently of the operation of the head actuator.

The present invention provides a captive balloon communication system, the communication system comprises a ground support system, an RRU and a BBU; the RRU is disposed on a balloon, the BBU is disposed on the ground and the RRU forms a split base station, or the BBU is disposed on the balloon and forms an integrated base station with the RRU, the ground support system and the balloon are connected by a cable, the cable is provided with an optical fiber, and signal output of the BBU is transmitted through the optical fiber, and the optical fiber transmits baseband IQ data and OAM signaling data of the BBU to the RRU. The captive balloon communication system allows increasing balloon height, so that coverage distance is greatly increased, and reduces an interference path of multipath interference. The captive balloon communication system can effectively reduce influence of the radius of curvature of the earth on communication. The low-band frequency allows the signal to be transmitted beyond line of sight transmission, and the signal will be as far as 120km to 300km.

The invention relates to a radio frequency system and communication equipment, the radio frequency system comprises a radio frequency transceiver and a radio frequency transmit-receive circuit, the radio frequency transmit-receive circuit is connected with the radio frequency transceiver, the radio frequency transmit-receive circuit is configured with a first receiving path, a second receiving path, a third receiving path and a fourth receiving path, the first receiving path is connected with the second receiving path, and the third receiving path is connected with the fourth receiving path. The main set is configured to support main set receiving of low-frequency signals; the second receiving path is configured to be used for diversity reception of the low-frequency signals; the third receiving path is configured to be used for supporting MIMO receiving of the low-frequency signal; and the fourth receiving path is configured to be used for supporting MIMO receiving of the low-frequency signals, and can realize a 4 * 4 MIMO receiving function of the low-frequency signals so as to improve the receiving performance of the low-frequency signals.

The invention belongs to the technical field of sensing, and discloses a culture fishery distributed water quality remote monitoring system and a monitoring method; the culture fishery distributed water quality remote monitoring system is composed of a water quality monitoring node, a network controller and an Internet of Things monitoring platform; wherein the water quality monitoring node is used for monitoring water quality through sensors, controlling on and off of aerators according to numerical values measured by the sensors, and sending collected data and an actuator state to the network controller through an LoRa communication module; the network controller is used for packaging all node data and then sending the packaged node data to the Internet of Things monitoring platform; and the Internet of Things monitoring platform is used for looking up the historical data of the sensors and remotely controlling the working state of each aerator of each node. The invention provides a communication scheme which can realize long distance, long battery life, simple installation, low cost, strong expansibility and secure encryption, and the system can be operated in global free frequency bands at present.

The invention discloses an uplink scheduling correction method based on an LTE system, and the method comprises the steps: calculating a scaling factor alpha according to the relation of an SINR (signal to interference plus noise ratio), a spectrum utilization ratio, a PHR, and a number of RBs of a scheduled PUSCH at the moments t1+t2 and t1+k; calculating the number (shown in the description) ofschedulable data channels RB at the moment t1+t2 according to the scaling factor alpha and the number (shown in the description) of schedulable data channels RB. The method reduces the number of uplink schedulable RBs on the basis of external annular link adaption when a mobile terminal moves an edge of a cell and the MCS is lower than a preset reference threshold MCSthreshold when a base stationside performs the scheduling of a terminal side PUSCH. Therefore, the method can improve the transmission energy on each RB when the terminal side performs the data transmission on a PUSCH, thereby improving the decoding capability of the PUSCH. Through this strategy, the coverage distance of the base station can be increased. In the field of private network communication, the method is applied tothe application field with the higher requirement for the coverage distance of the base station, and is higher in practical value.