CN110474971B

CN110474971B - Wide-area low-power-consumption Internet of things communication system and transmission method thereof

Info

Publication number: CN110474971B
Application number: CN201910715013.XA
Authority: CN
Inventors: 陈牧
Original assignee: Tianchen Xingtong Shenzhen Technology Co ltd
Current assignee: Tianchen Xingtong Shenzhen Technology Co Ltd
Priority date: 2019-08-05
Filing date: 2019-08-05
Publication date: 2022-06-10
Anticipated expiration: 2039-08-05
Also published as: CN110474971A

Abstract

The invention discloses a wide-area low-power-consumption Internet of things communication system, belonging to the technical field of Internet of things; a wide-area low-power-consumption Internet of things communication system comprises a plurality of Internet of things terminals, wherein data are received through an Internet of things terminal module for preprocessing and are transmitted to a satellite radio frequency unit to realize frequency conversion, so that a synchronous orbit communication satellite can receive signals through the transmitting action of a two-dimensional phased array antenna, receive information and transmit the information to a satellite Internet of things gateway station, the information is received and transmitted to a cloud computing center by the satellite Internet of things gateway station, and the information is processed by a cloud server and uploaded to a client Internet of things application platform; the beneficial effects of the invention are: by utilizing a synchronous orbit satellite and a gateway station, various internet of things terminals form a wide-area internet of things, so that wide-area internet of things communication is realized; the design of low power consumption is adopted, and the autonomous awakening and closing of the satellite radio frequency unit of the terminal are realized by monitoring data, so that the working time of the terminal is prolonged.

Description

Wide-area low-power-consumption Internet of things communication system and transmission method thereof

Technical Field

The invention relates to the technical field of Internet of things, in particular to a wide-area low-power-consumption Internet of things communication system and a transmission method thereof.

Background

The existing Internet of things is mainly based on a short-distance closed Internet of things set up by a ground public mobile communication network or a self-built gateway of an operator, and an Internet of things terminal realizes short-distance wireless communication by using lower frequencies of hundreds of MHz such as VHF \ UHF and the like; the communication connection of the internet of things cannot be provided in remote areas, oceans, air and other areas and in areas where the ground network of the operator cannot cover or the access gateway cannot be arranged.

The Chinese patent with the application number of 201410845811.1 provides a method for a special internet of things gateway for a refrigerator based on Beidou satellite positioning. The Beidou satellite positioning system utilizes the Beidou satellite positioning function to realize position information acquisition, and transmits information such as position, temperature and the like to a platform through GPRS; therefore, in the patent of the invention, the satellite only plays a positioning function, and the transmission function of the internet of things is realized by the GPRS data communication service provided by an operator.

The chinese patent with application number 201711416665.0 provides a system for realizing data acquisition and transmission of internet of things based on an internet of things constellation consisting of a plurality of internet of things minisatellites, the internet of things satellites in the system are low orbit minisatellites with orbit height of hundreds to one thousand kilometers, and dozens or even thousands of satellites are needed to realize real-time large-scale ground coverage, and a plurality of years are needed from implementation to service provision, and the current rapid and vigorous internet of things application development needs cannot be solved.

Disclosure of Invention

The invention aims to provide a wide-area low-power-consumption Internet of things communication system, which utilizes the existing synchronous orbit communication satellite to realize the wide-area Internet of things communication function under various application environments with different regions and long distances.

The invention is realized by the following technical scheme:

a wide-area low-power-consumption Internet of things communication system comprises a sensor transceiving system, a satellite and a mobile client processing system;

the sensor transceiving system comprises a sensor data interface for receiving detection information of an external sensor; the Internet of things terminal module receives information transmitted from the sensor data interface and transmits the information to the satellite radio frequency unit; the satellite radio frequency unit is used for carrying out frequency conversion on the information sent to the satellite and sending the information to the two-dimensional phased array antenna; the two-dimensional phased array antenna is used for sending the information after frequency conversion to a synchronous or medium-low orbit communication satellite;

the satellite is a synchronous or medium-low orbit communication satellite and is used for sending the received information to a ground information processing station;

the client processing system comprises a satellite Internet of things gateway station and is used for receiving information transmitted by a satellite or sending an acquisition instruction to the satellite; and the cloud service center is used for receiving information transmitted by the satellite Internet of things gateway station and transmitting the information to an industry user or receiving an acquisition instruction of the industry user and transmitting the acquisition instruction to the satellite Internet of things gateway station.

Further, the internet of things terminal module: the device comprises an external interface, a baseband unit and a processing unit, wherein the baseband unit packages a protocol suitable for satellite channel transmission for data from a sensor data port; and redundant error correction symbols are added for correcting burst error codes caused by data transmission of a long-distance wireless channel; the baseband unit is also used for grouping the data packets after modulation and coding and carrying out spread spectrum modulation on the grouped data packets so as to enable the grouped data packets to be suitable for remote satellite channel transmission;

the processing unit is used for awakening or sleeping the baseband unit, wherein the awakening comprises timing awakening and fixed-point awakening, the timing awakening is used for awakening the Internet of things terminal in a specified place, and the fixed-point awakening is used for awakening the Internet of things terminal in a specified area; or response is realized on the acquisition instruction sent by the ground information processing station, and the vehicle-mounted Internet of things terminal is awakened to complete acquisition and transmission of the required data;

a satellite radio frequency unit: the satellite-borne communication system comprises an up-conversion module and a down-conversion module, wherein the up-conversion module carries out up-band frequency conversion on information sent to a satellite, and the down-conversion module carries out down-band frequency conversion on information returned by the satellite;

Two-dimensional phased array antenna: and the two-dimensional scanning is realized through the pitching azimuth, and the two-dimensional scanning is used for beam tracking and modulation coding of radio frequency signals sent to the synchronous orbit communication satellite.

The satellite Internet of things gateway station comprises: the multi-channel gateway equipment comprises a plurality of multi-channel gateway equipment which are connected in parallel, wherein the multi-channel gateway equipment comprises a radio frequency branching and branching device, a multi-channel gateway module, a network module and a power supply module; when receiving information, the radio frequency branching and branching device is used for receiving satellite internet of things information of the satellite radio frequency unit and branching the satellite internet of things information to the multi-channel gateway module; when the information is sent, the radio frequency combiner is used for combining the satellite Internet of things information of the multi-channel gateway module and then transmitting the combined information to the satellite radio frequency unit; when receiving information, the multi-channel gateway module decodes and demodulates the satellite internet of things information received from the radio frequency splitter into baseband information, and then transmits the baseband information to the ground network through the network interface; when information is sent, baseband information of a ground network is received, modulated and encoded into a satellite Internet of things information format, and transmitted to a satellite through a satellite radio frequency unit and a satellite communication antenna; when receiving the information, the network module is used for collecting the baseband information demodulated by the multi-channel gateway module and then transmitting the baseband information to the ground network; when sending information, the network module is used for modulating baseband information transmitted by the ground network and then sending the modulated baseband information to the multi-channel gateway module; and the power supply module is respectively used for supplying power to the multi-channel gateway module, the network module and the radio frequency combiner/divider.

Further, the multi-channel gateway module comprises an external interface, a satellite internet of things communication module and a multi-channel satellite internet of things gateway module;

the external interface is used for realizing information transmission with the network module and the radio frequency combiner/divider;

the satellite Internet of things communication module is used for converting satellite Internet of things information and baseband signals;

and the multi-channel satellite Internet of things gateway module is used for completing the control and information transmission of the multi-channel communication module.

The satellite Internet of things communication module comprises a multitask processing unit, and a FLASH module, an indicator lamp module, a satellite Internet of things channel module, a clock module, a watchdog module, an RS232/RS485 transceiver module and a network interface module which are communicated with the multitask processing unit are connected around the multitask processing unit; the satellite Internet of things channel module is also communicated with a wireless interface; the RS232/RS485 transceiver module is also communicated with the power supply module through a data interface module; the network interface module is also communicated with the satellite Internet of things gateway module; the satellite Internet of things gateway module consists of 8 satellite Internet of things gateway channel modules; the multi-channel gateway module is provided with 8 satellite Internet of things channel modules with different frequencies in parallel, each satellite Internet of things channel module forms a complete frequency band of the network management module, and a frequency division molecular communication unit is adopted when a signal is accessed.

Further, the sensor transceiving system also comprises a lithium ion battery module for supplying power to the vehicle-mounted internet of things terminal; the driving control unit is used for controlling the interior of the terminal of the Internet of things; the synchronous orbit communication satellite is used for data transparent transmission between the terminal of the Internet of things and the central station;

the lithium ion battery module is communicated with the drive control unit, the Internet of things terminal module, the sensor data interface, the miniature radio frequency unit and the two-dimensional phased array antenna respectively, the drive control unit is communicated with the Internet of things terminal module, the Internet of things terminal module is communicated with the satellite radio frequency unit and the sensor data interface respectively, and the satellite radio frequency unit is communicated with the two-dimensional phased array antenna.

Further, the sensor transceiving system comprises a sensor data interface for receiving detection information of an external sensor; the Internet of things terminal module receives information transmitted from the sensor data interface and transmits the information to the satellite radio frequency unit; the satellite radio frequency unit is used for carrying out frequency conversion on the information sent to the satellite and sending the information to the two-dimensional phased array antenna; the two-dimensional phased array antenna is used for sending the information after frequency conversion to a synchronous or medium-low orbit communication satellite;

Through thing networking terminal module received data carry out the preliminary treatment to transmit to satellite radio frequency unit and realize the frequency conversion, so that synchronous orbit communication satellite can receive the signal through the transmission action of two-dimensional phased array antenna, synchronous orbit communication satellite receives after the information and forwards satellite thing networking gateway station, receives and transmits to cloud computing center by satellite thing networking gateway station, handles the back and uploads to customer thing networking application platform through the cloud ware.

Furthermore, the terminal of the internet of things comprises an external interface and a baseband unit, the terminal of the internet of things is connected with a sensor in a designated place or a designated area through the external interface, after the terminal of the internet of things receives sensor data transmitted by the external interface, the baseband unit carries out modulation coding for adapting to satellite channel transmission on the data, and redundancy error correction symbols of 4/5 coding rate are added in the modulation coding to correct sudden error codes; the baseband unit packages the data from the sensor data port by a protocol suitable for satellite channel transmission; and redundant error correction symbols are added for correcting burst error codes caused by data transmission of a long-distance wireless channel;

The terminal of the internet of things further comprises a processing unit, wherein the processing unit is used for awakening or sleeping the baseband unit, the awakening comprises timing awakening and fixed-point awakening, the timing awakening is used for awakening the terminal of the internet of things in a specified place, and the fixed-point awakening is used for awakening the terminal of the internet of things in a specified area; or response is realized to the acquisition instruction sent by the ground information processing station, and the terminal of the internet of things is awakened to complete acquisition and transmission of the required data.

Further, if the satellite radio frequency unit uploads information, the internet of things terminal module acquires data through a sensor data interface and modulates and codes the received effective information; an up-conversion module of the satellite radio frequency unit up-converts the modulated and coded upload data from an L wave band to an L, S, C, X, Ku, Ka or EHF frequency band signal, and a two-dimensional phased array antenna receives and amplifies the frequency-converted upload data and then sends the frequency-converted upload data to a synchronous or medium-low orbit communication satellite;

if the satellite radio frequency unit downloads information, a down-conversion module of the satellite radio frequency unit down-converts the information transmitted by the synchronous or medium-low orbit communication satellite from an L, S, C, X, Ku, Ka or EHF frequency band wave band signal to an L wave band, and an Internet of things terminal module receives the down-conversion information and then transmits the down-conversion information to a sensor through an external data interface.

Further, when a vehicle, a ship or an airplane moves in a designated area, the two-dimensional phased array antenna adjusts the direction of a wave beam through the driving unit and the driving control unit to realize alignment and tracking of a synchronous medium or low orbit communication satellite; the driving control unit respectively receives information of the GPS positioning module and the attitude and heading sensor, determines the current position, attitude and heading information of the two-dimensional phased array antenna, acquires a pitching angle and an azimuth angle of the two-dimensional phased array antenna, which are aligned to be adjusted, according to the requirements of a synchronous or medium-low orbit communication satellite, and then sends the pitching angle and the azimuth angle to the driving unit; and the driving unit adjusts according to the pitch angle and the azimuth angle so that the wave beam of the two-dimensional phased array antenna is aligned to the satellite.

The system comprises a plurality of multi-channel gateway devices connected in parallel, wherein each multi-channel gateway device comprises a radio frequency branching and branching device, a multi-channel gateway module, a network module and a power supply module;

when receiving information, the radio frequency branching and branching device is used for receiving satellite internet of things information of the satellite radio frequency unit and branching the satellite internet of things information to the multi-channel gateway module; when the information is sent, the radio frequency combiner is used for combining the satellite Internet of things information of the multi-channel gateway module and then transmitting the combined information to the satellite radio frequency unit; the radio frequency divider and the splitter are also used for transmitting the received signals to a satellite Internet of things module, the satellite Internet of things module is communicated with an external ground network interface through an external data interface, the external ground network interface transmits information to a network control server of a cloud service center through the Internet, and the network control server identifies user information by using the information marks and transmits the information to a specified client through the ground Internet; or the user client applies for information acquisition to a cloud service center network control server through a mobile terminal APP, the network control server transmits the request to a satellite Internet of things gateway station, the satellite Internet of things gateway and a satellite Internet of things terminal of the client needing information acquisition are appointed to be in satellite connection, data of the appointed sensor are collected through an Internet of things terminal station interface, transmitted to the satellite through a radio frequency unit, received by the satellite Internet of things gateway station and transmitted to a cloud service center through a ground network, and then forwarded to the user side initiating the acquisition signal

When receiving information, the multi-channel gateway module decodes and demodulates the satellite internet of things information received from the radio frequency splitter into baseband information, and then transmits the baseband information to the ground network through the network interface; when information is sent, baseband information of a ground network is received, modulated and encoded into a satellite Internet of things information format, and transmitted to a satellite through a satellite radio frequency unit and a satellite communication antenna;

when receiving the information, the network module is used for collecting the baseband information demodulated by the multi-channel gateway module and then transmitting the baseband information to the ground network; when sending information, the network module is used for modulating baseband information transmitted by the ground network and then sending the modulated baseband information to the multi-channel gateway module.

And the power supply module is respectively used for supplying power to the multi-channel gateway module, the network module and the radio frequency combiner/divider.

the multi-channel satellite Internet of things gateway module is used for completing distribution and information transmission of the multi-channel communication module; the access quantity of the Internet of things terminals of one satellite Internet of things communication module is less than 2000; if the number of the terminals which work simultaneously is increased to more than 2000 or the transmission rate is larger than 120kbps, accessing another terminal which needs to communicate into the same gateway or different gateway idle channels; the accessed gateway channel is connected to a ground local area network and is transmitted to a cloud server through the ground network and the Internet;

The cloud server is provided with a network control server, the network control server judges whether a gateway channel is congested according to the access quantity of the gateways and frequency bandwidth resources, if so, the idle channels are sequentially started by a new request according to a convention sequence, otherwise, the idle channels are not required to be started; if all idle channels of one gateway station are occupied, the network control server starts the next satellite Internet of things gateway station; when the next satellite Internet of things gateway station is started, if the next satellite Internet of things gateway station is an authenticated in-network user, the next satellite Internet of things gateway station can be in butt joint with the synchronous orbit satellite, otherwise, access is refused; the in-network authentication is a network identification number used for identifying access between the terminal and the terminal of the Internet of things.

Compared with the prior art, the invention has the beneficial effects that:

by utilizing a synchronous orbit satellite and a gateway station, various internet of things terminals form a wide-area internet of things, so that wide-area internet of things communication is realized; by utilizing the remote coverage of the synchronous orbit satellite, the problem that the transmission distance of the traditional Internet of things is short and the information acquisition of cross-region coverage cannot be realized is solved; the design of low power consumption is adopted, and the radio frequency unit of the terminal satellite is automatically awakened and closed by monitoring data, so that the power consumption of daily standby is reduced, the battery consumption is effectively saved, and the working time of the terminal is greatly prolonged.

Drawings

FIG. 1 is a diagram of a wide area low power IOT communication system for a geostationary orbit communication satellite in accordance with the present invention;

FIG. 2 is a schematic flow chart of receiving and sending messages according to the present invention;

FIG. 3 is a schematic diagram of a terminal of the Internet of things of a synchronous orbit communication satellite according to the present invention;

FIG. 4 is a flow chart of phased array antenna tracking versus stars in accordance with the present invention;

FIG. 5 is a flow chart of the low power control of the present invention;

FIG. 6 is a schematic diagram of a satellite Internet of things gateway station according to the present invention;

FIG. 7 is a schematic diagram of a multi-channel gateway module according to the present invention;

fig. 8 is a schematic structural diagram of a satellite internet of things channel module according to the present invention.

Detailed Description

The present application will be described in further detail with reference to the following drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the relevant invention and not restrictive of the invention. It should be noted that, for convenience of description, only the portions related to the present invention are shown in the drawings.

It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present application will be described in detail below with reference to the embodiments with reference to the attached drawings.

the sensor transceiving system comprises a sensor data interface for receiving the detection information of an external sensor; the Internet of things terminal module receives information transmitted from the sensor data interface and transmits the information to the satellite radio frequency unit; the satellite radio frequency unit is used for carrying out frequency conversion on the information sent to the satellite and sending the information to the two-dimensional phased array antenna; the two-dimensional phased array antenna is used for sending the information after frequency conversion to a synchronous or medium-low orbit communication satellite;

the satellite is a synchronous or medium-low orbit communication satellite and is used for sending the received information to the ground information processing station;

the client processing system comprises a satellite Internet of things gateway station and is used for receiving information transmitted by a satellite or sending an acquisition instruction to the satellite; the cloud service center is used for receiving information transmitted by the satellite Internet of things gateway station and transmitting the information to an industry user or receiving an acquisition instruction of the industry user and transmitting the acquisition instruction to the satellite Internet of things gateway station; by utilizing a synchronous orbit satellite and a gateway station, various internet of things terminals form a wide-area internet of things, so that wide-area internet of things communication is realized; by utilizing the remote coverage of the synchronous orbit satellite, the problem that the transmission distance of the traditional Internet of things is short and the information acquisition of cross-region coverage cannot be realized is solved; the design of low power consumption is adopted, and the radio frequency unit of the terminal satellite is automatically awakened and closed by monitoring data, so that the power consumption of daily standby is reduced, the battery consumption is effectively saved, and the working time of the terminal is greatly prolonged.

Thing networking terminal module: the device comprises an external interface, a baseband unit and a processing unit, wherein the baseband unit packages the data from a sensor data port by a protocol suitable for satellite channel transmission; and redundant error correction symbols are added for correcting burst error codes caused by data transmission of a long-distance wireless channel; the baseband unit is also used for grouping the data packets after modulation coding and carrying out spread spectrum modulation on the grouped data packets so as to enable the grouped data packets to be suitable for remote satellite channel transmission;

the processing unit is used for awakening or sleeping the baseband unit, and awakening comprises timing awakening and fixed point awakening, wherein the timing awakening is used for awakening the Internet of things terminal in a specified place, and the fixed point awakening is used for awakening the Internet of things terminal in a specified area; or response is realized on the acquisition instruction sent by the ground information processing station, and the vehicle-mounted Internet of things terminal is awakened to complete acquisition and transmission of the required data;

Satellite thing networking gateway station: the multi-channel gateway equipment comprises a plurality of multi-channel gateway equipment which are connected in parallel, wherein the multi-channel gateway equipment comprises a radio frequency branching and branching device, a multi-channel gateway module, a network module and a power supply module; when receiving information, the radio frequency branching and branching device is used for receiving satellite internet of things information of the satellite radio frequency unit and branching the satellite internet of things information to the multi-channel gateway module; when the information is sent, the radio frequency combiner is used for combining the satellite Internet of things information of the multi-channel gateway module and then transmitting the combined information to the satellite radio frequency unit; when receiving information, the multi-channel gateway module decodes and demodulates the satellite internet of things information received from the radio frequency splitter into baseband information, and then transmits the baseband information to the ground network through the network interface; when information is sent, baseband information of a ground network is received, modulated and encoded into a satellite Internet of things information format, and transmitted to a satellite through a satellite radio frequency unit and a satellite communication antenna; when receiving the information, the network module is used for collecting the baseband information demodulated by the multi-channel gateway module and then transmitting the baseband information to the ground network; when sending information, the network module is used for modulating baseband information transmitted by the ground network and then sending the modulated baseband information to the multi-channel gateway module; and the power supply module is respectively used for supplying power to the multi-channel gateway module, the network module and the radio frequency combiner/divider.

The multi-channel gateway module comprises an external interface, a satellite Internet of things communication module and a multi-channel satellite Internet of things gateway module;

The satellite Internet of things communication module comprises a multitasking unit, and a FLASH module, an indicator light module, a satellite Internet of things channel module, a clock module, a watchdog module, an RS232/RS485 transceiver module and a network interface module which are communicated with the multitasking unit are connected around the multitasking unit; the satellite Internet of things channel module is also communicated with the wireless interface; the RS232/RS485 transceiver module is also communicated with the power supply module through a data interface module; the network interface module is also communicated with the satellite Internet of things gateway module; the satellite Internet of things gateway module consists of 8 satellite Internet of things gateway channel modules; the multi-channel gateway module is provided with 8 satellite Internet of things channel modules with different frequencies in parallel, each satellite Internet of things channel module forms a complete frequency band of the network management module, and a frequency division molecular communication unit is adopted when a signal is accessed.

The sensor transceiving system also comprises a lithium ion battery module for supplying power to the vehicle-mounted Internet of things terminal; the driving control unit is used for controlling the interior of the terminal of the Internet of things; the synchronous orbit communication satellite is used for data transparent transmission between the terminal of the Internet of things and the central station;

the lithium ion battery module is communicated with the driving control unit, the Internet of things terminal module, the sensor data interface, the miniature radio frequency unit and the two-dimensional phased array antenna respectively, the driving control unit is further communicated with the Internet of things terminal module, the Internet of things terminal module is further communicated with the satellite radio frequency unit and the sensor data interface respectively, and the satellite radio frequency unit is further communicated with the two-dimensional phased array antenna.

The client processing system comprises a satellite Internet of things gateway station and is used for receiving information transmitted by a satellite or sending an acquisition instruction to the satellite; and the cloud service center is used for receiving information transmitted by the satellite Internet of things gateway station and transmitting the information to the industry user or receiving an acquisition instruction of the industry user and transmitting the acquisition instruction to the satellite Internet of things gateway station.

The data are received through the Internet of things terminal module and preprocessed, and the data are transmitted to the satellite radio frequency unit to achieve frequency conversion, so that the synchronous orbit communication satellite can receive signals through the transmitting action of the two-dimensional phased array antenna, receive information and transmit the information to the satellite Internet of things gateway station, the information is received and transmitted to the cloud computing center through the satellite Internet of things gateway station, and the information is processed by the cloud server and uploaded to the client Internet of things application platform.

The terminal of the Internet of things comprises an external interface and a baseband unit, the terminal of the Internet of things is mutually connected with a sensor in a specified place or a specified area through the external interface, after the terminal of the Internet of things receives sensor data transmitted from the external interface, the baseband unit carries out modulation coding for the data to adapt to satellite channel transmission, and redundancy error correction symbols of 4/5 coding rate are added in the modulation coding to correct burst error codes; the baseband unit packages the data from the sensor data port by a protocol suitable for satellite channel transmission; and redundant error correction symbols are added for burst error correction caused by data transmission of a long-distance wireless channel;

The terminal of the internet of things further comprises a processing unit, wherein the processing unit is used for awakening or sleeping the baseband unit, the awakening comprises timing awakening and fixed point awakening, the timing awakening is used for awakening the terminal of the internet of things in a specified place, and the fixed point awakening is used for awakening the terminal of the internet of things in a specified area; or response is realized to the acquisition instruction sent by the ground information processing station, and the terminal of the internet of things is awakened to complete acquisition and transmission of the required data.

If the satellite radio frequency unit uploads information, the Internet of things terminal module acquires data through a sensor data interface and modulates and codes the received effective information; an up-conversion module of the satellite radio frequency unit up-converts the modulated and coded upload data from an L wave band to an L, S, C, X, Ku, Ka or EHF frequency band signal, and a two-dimensional phased array antenna receives and amplifies the frequency-converted upload data and then sends the frequency-converted upload data to a synchronous or medium-low orbit communication satellite;

if the satellite radio frequency unit downloads information, a down-conversion module of the satellite radio frequency unit down-converts the information transmitted by the synchronous or medium-low orbit communication satellite from L, S, C, X, Ku, Ka or EHF frequency band signals to an L wave band, and an Internet of things terminal module receives the down-conversion information and then transmits the down-conversion information to a sensor through an external data interface.

When a vehicle, a ship or an airplane moves in a designated area, the two-dimensional phased array antenna adjusts the direction of a wave beam through the driving unit and the driving control unit to realize alignment and tracking of a synchronous or medium-low orbit communication satellite; the driving control unit respectively receives information of the GPS positioning module and the attitude and heading sensor, determines the current position, attitude and heading information of the two-dimensional phased array antenna, acquires a pitching angle and an azimuth angle of the two-dimensional phased array antenna, which are aligned to be adjusted, according to the requirements of a synchronous or medium-low orbit communication satellite, and then sends the pitching angle and the azimuth angle to the driving unit; and the driving unit adjusts according to the pitch angle and the azimuth angle so that the wave beam of the two-dimensional phased array antenna is aligned to the satellite.

The multi-channel gateway equipment comprises a plurality of multi-channel gateway equipment which are connected in parallel, wherein the multi-channel gateway equipment comprises a radio frequency branching and branching device, a multi-channel gateway module, a network module and a power supply module;

When receiving information, the multi-channel gateway module decodes and demodulates the satellite internet of things information received from the radio frequency combiner into baseband information, and then transmits the baseband information to a ground network through a network interface; when information is sent, baseband information of a ground network is received, modulated and encoded into a satellite Internet of things information format, and transmitted to a satellite through a satellite radio frequency unit and a satellite communication antenna;

the multi-channel satellite Internet of things gateway module is used for completing distribution and information transmission of the multi-channel communication module; the access quantity of the Internet of things terminals of one satellite Internet of things communication module is less than 2000; if the number of the terminals which work simultaneously is increased to more than 2000 or the transmission rate is larger than 120kbps, accessing another terminal which needs to communicate into the same gateway or different gateway idle channels; the accessed gateway channel is connected in a ground local area network and is transmitted to the cloud server through the ground network through the Internet;

According to the size of the network scale, the gateway can also realize seamless stacking, and realize the expansion of network capacity or industry users and services; the network scale is judged according to the number of terminals in the network, if less than 500 terminals are in small scale, more than 5 ten thousand terminals are in large scale, and the middle is in medium scale;

the Internet cloud computing center stores the Internet of things server software system in the cloud for information control, management and forwarding in a satellite Internet of things network consisting of a satellite Internet of things network management server, a plurality of gateway stations and a plurality of terminals.

The gateway station of the internet of things is composed of a plurality of gateways of the internet of things, one gateway is provided with 8 channel modules, and each channel module is a single-channel module and can be connected with a plurality of terminals. The module of one channel can realize satellite connection with an in-network authenticated Internet of things terminal with a unique network identification number; if a plurality of internet of things terminals are accessed simultaneously, according to signals which are sent by the terminals and have different frequencies and spreading code configurations, the internet of things gateway can support a channel of a plurality of orthogonal frequency channel internet of things gateways on a single channel to be communicated with the terminals simultaneously, and in order to ensure that the signals between the terminals cannot interfere with each other, the spreading codes are configured in an orthogonal mode, so that frequency and time multiplexing is realized. One channel supports a plurality of channels with orthogonal frequencies, a single channel can allocate a plurality of frequency bands for terminals to use in a designated transmission bandwidth, and terminals can share one frequency and use in a time-sharing mode through the allocation of time slots in a time-division working mode; the maximum access amount of one channel can support the access of 2000 terminals of the internet of things, when the data rate sent by the terminals to the gateway is high or the number of the terminals working at the same time is increased in the terminals of the internet of things, due to the problem of bandwidth, when a single channel receives terminal information with high transmission rate, the whole frequency band and time are occupied, so that the number of the terminals capable of communicating at the same time in the single channel is reduced, namely the number of the terminals accessed at the same time in a single channel module is reduced, and if a new terminal needs to communicate at the same time, the terminal is accessed to other single channels; at the moment, the gateway of the Internet of things opens a new bandwidth or allocates the connected terminal to other channel modules; if the 8 channels of the same gateway module have spare resources, the spare resources are distributed to other channels of the 8 channels of the same gateway module, and if the 8 channels of the same module are full, the spare resources are distributed to a single channel or other gateways of other gateway modules;

A radio frequency unit in the satellite Internet of things gateway transmits the received signal to a satellite Internet of things module, the satellite Internet of things module is communicated with an external ground network interface through an external data interface, the external ground network interface transmits information to a network control server of a cloud service center through the Internet, the network control server identifies a user ID number through an information mark, and transmits the information to a specified client through the ground Internet; or the user client applies for information acquisition to a cloud service center network control server through a mobile terminal APP, the network control server transmits a request to a satellite Internet of things gateway station, the satellite Internet of things gateway is appointed to be in satellite connection with a satellite Internet of things terminal of a client needing information acquisition, data of an appointed sensor is collected through an Internet of things terminal station interface, transmitted to a satellite through a radio frequency unit, received by the satellite Internet of things gateway station, transmitted to a cloud service center through a ground network, and forwarded to a user side initiating acquisition signals;

the network control server can judge whether a gateway channel is congested according to the access quantity of the gateways and frequency bandwidth resources, when the gateway channel is congested in communication, new requests can sequentially start idle channels according to a preset sequence, and when all idle channels of a gateway station are occupied, the network control server can start a new multi-channel gateway station according to a preset sequence. The output is that the internet of things module of the gateway station converts signals transmitted by the satellite into baseband signals available for the ground network, and the baseband signals are directly transmitted to the internet through an external network interface and are transmitted to the cloud server through the internet.

The internet of things gateway station is connected with the internet of things terminal through a satellite, and the internet of things terminal transmits data to the gateway and then transmits the data to the cloud server through the ground network through the gateway, and vice versa. The method comprises the following steps that the interior of a satellite internet of things network, namely the interior of the internet of things network formed by network management software, gateway stations and terminal stations on a cloud server; the cloud computing server comprises a network server and an application server, wherein: the network server is positioned at the cloud end and consists of one or more control management modules, executes authentication, channel assignment and service transmission establishment and release of the gateway and the terminal, and forwards data to the application server; a network server can be connected to a plurality of application servers, which server the terminal uses being determined by the application to which the terminal belongs.

The application server is responsible for accessing the terminal to the network, and encrypting the downlink data and decrypting the uplink data. The method is mainly used for automatic control and management. All in-network terminal users are in different application scenes, including fixed use scenes and a little use scene of vehicle, ship and airborne application scenes, and different scenes have different requirements on modules for attitude control; after the sensor collects information, different types of terminals finish uploading; the method comprises the following steps that all internet of things terminals have the same information acquisition mode and transmission mode, wherein fixed station antennas are flat antennas, and vehicle-mounted antennas, ship-mounted antennas and airborne antennas are communication-in-motion antennas; after being forwarded by a synchronous orbit satellite, the data are received by a ground Internet of things gateway station and are sent to a cloud computing center; the client Internet of things application platform refers to a set of application software which can be transmitted to the client Internet of things application platform on the ground and in a mobile mode, comprises a database, an operation interface, a configuration interface and a control interface, and has the functions of receiving data acquired by the satellite Internet of things, analyzing and obtaining a result for a user to use, or remotely monitoring and controlling the working mode or the acquisition frequency of a remote terminal and the like, so that the wide-area Internet of things signal receiving and sending are realized.

The gateway station and the Internet of things sensors of various types of terminals have the same type of data interface; the driving control unit has the main functions of calculating the pitching and azimuth angles of the antenna according to the track forecast, calculating the pitching and azimuth angles of the antenna through information transmitted by track forecast software, resolving the pitching and azimuth angles into amplitude-phase data codes of all channels of the array surface, and controlling the amplitude-phase value, the calibration working state and the like of each subarray of each phased array antenna corresponding to one antenna channel. Each chip on the circuit integrated board where the drive control unit is located provides working voltage and is connected with the power supply module through a control cable; the connection relation between the antenna working power supply and the power supply module and between the antenna working power supply and the driving module is as follows: the power module is connected to the driving module, the antenna working power supply is connected to the driving module, and the driving module controls the power module to forward the switch of the antenna working power supply. The digital control circuit mainly comprises an FPGA, a FLASH and the like, realizes various control communication requirements of the antenna, and is mainly used for instruction resolving inside the FPGA. And (3) sending functional instructions such as beam switching, power-on, power-off control, gain control and the like to the antenna to complete the control of a phase shifter and an attenuator in the antenna. A beam-controlled hardware wave control board in the antenna generates various working power supplies required by the chip in the module through a power supply conversion chip from a digital or analog power supply provided by the power supply extension. The lithium batteries are all fixedly configured units, the satellite radio frequency unit and the two-dimensional phased array antenna are respectively configured with units or antennas which are matched with the satellite antenna and adopt different radio frequency units and different satellite antennas to form L, C, Ku or Ka frequency bands according to selected synchronous orbit satellites with different frequency bands, wherein the gateway station adopts a ground station antenna, and the terminal station adopts the two-dimensional phased array antenna to meet the requirement of automatic satellite tracking of mobile carriers such as vehicles, ships, aircrafts and the like. The terminal uses ground gateway station and cloud computing server to link together through the internet, need the communication when all kinds of terminals, open the switch at terminal, be connected the data interface cable at required thing networking collection equipment and terminal, after the thing networking sensor gathered data, send by the sensor, the sensor is dispatched from the factory and is set for to thing networking terminal, the terminal is automatic accomplishes and aims at synchronous orbital communication satellite, and pass through satellite remote transmission with thing networking data to ground gateway station, ground gateway station sends information to cloud computing center through ground internet, data only do at the cloud server and forward, do not do information processing. And the data are forwarded to application centers of various users, so that the data transmission of the wide area Internet of things is realized.

The user can also remotely initiate a request to the network server through the application server, the network server informs the gateway station to establish connection with a terminal which needs to communicate with the user, the network server sends an instruction to the sensor to request the sensor to set up data acquisition, the acquisition of the information of the internet of things is initiated, the request instruction of the user is sent to the cloud computing center through the ground internet, the request is sent to the ground gateway station after being processed by the cloud server, the ground gateway station sends the data acquisition instruction through a satellite, and the terminal can control the sensor of the internet of things to carry out data acquisition after receiving the data acquisition instruction.

Data collected by the internet of things sensors arranged on various carriers or fixed platforms are accessed to internet of things sensor data interfaces in fixed, shipborne or airborne internet of things terminals and are sent to internet of things terminal modules in the terminals, the internet of things modules are used for monitoring, and if valid data exist in the interfaces and are transmitted to a cache or are awakened at regular time, data receiving is judged; when data are received, the received sensor data are modulated and coded and transmitted to a satellite radio frequency unit through an internal cable, the satellite radio frequency unit up-converts the modulated baseband data to the frequency of a synchronous orbit communication satellite, the frequency can be up-converted to L, C, Ku or Ka frequency band carrier waves according to the type of the selected synchronous satellite, the carrier waves are transmitted to a two-dimensional phased array antenna unit, radio frequency signals are transmitted to the synchronous orbit satellite, the signals are transmitted through the synchronous satellite, received by a remote internet of things gateway station and then transmitted to a cloud computing center through the internet, and the signals are processed by a cloud server and then transmitted to users in various industries.

The remote initiative initiation data acquisition process of an industry user comprises the steps that an industry user request instruction is operated on Internet of things application platform software, the request is sent to a cloud computing center through the Internet on an application server through a ground network, the cloud server receives the request and sends data to an Internet of things gateway station, the gateway station modulates and encodes information and then transmits the information to a satellite through a radio frequency unit, the information is forwarded to a specified Internet of things terminal through the satellite, the terminal receives the instruction and then sends a data acquisition requirement to an Internet of things sensor, the Internet of things sensor transmits the data to the terminal, the terminal sends the data to the satellite through the radio frequency unit and an antenna, and the data is forwarded to the gateway station through the satellite and is sent to an industry client through the ground network.

Wherein to realize that vehicle, ship, aircraft accomplish in the marching and to the transmission of synchronous orbit satellite, need two-dimensional phased array antenna to accomplish accurate tracking to the star, its work flow is: a control driving unit in the terminal is provided with an attitude sensor and a GPS receiver, attitude and course information of a vehicle can be automatically acquired after the control driving unit is started, the pitching and azimuth angles of the two-dimensional phased array antenna are calculated in real time according to the longitude position of the selected synchronous satellite, the calculated result is transmitted to the interior of the two-dimensional phased array antenna through a serial port, the antenna finishes automatic alignment of a beam to the satellite according to the calculated result, adjusts the direction of the beam every 200ms or more in the moving process of the vehicle, and aligns and tracks the synchronous orbit communication satellite.

The low power transmission is realized through a terminal wake-up function: the main power usage in the terminal is that the transmitting power amplifier of the satellite radio frequency unit comprises a transmitting up-converter, a power amplifier, a receiving down-converter and a low noise amplifier. The control unit of each terminal is connected with the terminal radio frequency unit through an I2C or similar serial bus interface, a low level is transmitted through the control unit, the switch is closed, a high level is transmitted, the switch turns on a power switch of the interface control terminal radio frequency unit, and meanwhile, the control unit is connected with the sensor interface of the Internet of things through the bus interface, so that interface data can be monitored in real time. When the control unit monitors that the data interface has data transmission, the control unit automatically opens a transmitting channel of the satellite radio frequency unit to finish the satellite transmission of the data, and the satellite transmission is configured in the terminal in advance within an appointed time, usually 5-10 seconds, the terminal automatically counts time according to an internal clock, and the control unit automatically closes when no new data enters the data interface; the method mainly comprises the steps of monitoring whether data are transmitted into a data interface BUFF area of a connection sensor or not and monitoring a transmitting channel of a satellite radio frequency unit, so that the low-power-consumption function of the terminal is realized.

The above description is only a preferred embodiment of the application and is illustrative of the principles of the technology employed. It will be appreciated by a person skilled in the art that the scope of the invention as referred to in the present application is not limited to the embodiments with a specific combination of the above-mentioned features, but also covers other embodiments with any combination of the above-mentioned features or their equivalents without departing from the inventive concept. For example, the above features may be replaced with (but not limited to) features having similar functions disclosed in the present application.

Claims

1. The utility model provides a wide area low-power consumption thing networking communication system which characterized in that: the system comprises a sensor transceiving system, a satellite and a mobile client processing system;

the client processing system comprises a satellite Internet of things gateway station and is used for receiving information transmitted by a satellite or sending an acquisition instruction to the satellite; the cloud service center is used for receiving information transmitted by the satellite Internet of things gateway station and transmitting the information to an industry user or receiving an acquisition instruction of the industry user and transmitting the acquisition instruction to the satellite Internet of things gateway station;

the Internet of things terminal module: the device comprises an external interface, a baseband unit and a processing unit, wherein the baseband unit packages a protocol suitable for satellite channel transmission for data from a sensor data port; and redundant error correction symbols are added for correcting burst error codes caused by data transmission of a long-distance wireless channel; the baseband unit is also used for grouping the data packets after modulation and coding and carrying out spread spectrum modulation on the grouped data packets so as to enable the grouped data packets to be suitable for remote satellite channel transmission;

two-dimensional phased array antenna: the two-dimensional scanning is realized through the pitching azimuth, and the two-dimensional scanning is used for beam tracking and modulation coding of radio frequency signals sent to a synchronous orbit communication satellite;

2. The wide-area low-power internet of things communication system of claim 1, wherein:

the external interface is used for realizing information transmission with the network module and the radio frequency combiner;

the multi-channel satellite Internet of things gateway module is used for completing control and information transmission of the multi-channel communication module;

3. The wide-area low-power internet of things communication system according to claim 1, wherein: the sensor transceiving system also comprises a lithium ion battery module for supplying power to the vehicle-mounted Internet of things terminal; the driving control unit is used for controlling the interior of the terminal of the Internet of things; the synchronous orbit communication satellite is used for data transparent transmission between the terminal of the Internet of things and the central station;

4. A wide-area low-power-consumption Internet of things communication method is applied to a wide-area low-power-consumption Internet of things communication system comprising a sensor transceiving system, a satellite and a mobile client processing system, and is characterized in that:

the data are received through the Internet of things terminal module and preprocessed, and the data are transmitted to the satellite radio frequency unit to realize frequency conversion, so that the synchronous orbit communication satellite can receive signals through the transmitting action of the two-dimensional phased array antenna, the synchronous orbit communication satellite receives information and transmits the information to the satellite Internet of things gateway station, the information is received and transmitted to the cloud computing center through the satellite Internet of things gateway station, and the information is processed by the cloud server and uploaded to the client Internet of things application platform;

the terminal of the Internet of things comprises an external interface and a baseband unit, the terminal of the Internet of things is mutually connected with a sensor in a specified place or a specified area through the external interface, after the terminal of the Internet of things receives sensor data transmitted by the external interface, the baseband unit carries out modulation coding for the data to adapt to satellite channel transmission, and redundancy error correction symbols of 4/5 coding rate are added in the modulation coding to correct burst error codes; the baseband unit packages the data from the sensor data port by a protocol suitable for satellite channel transmission; and redundant error correction symbols are added for correcting burst error codes caused by data transmission of a long-distance wireless channel;

The terminal of the internet of things further comprises a processing unit, wherein the processing unit is used for awakening or sleeping the baseband unit, the awakening comprises timing awakening and fixed-point awakening, the timing awakening is used for awakening the terminal of the internet of things in a specified place, and the fixed-point awakening is used for awakening the terminal of the internet of things in a specified area; or response is realized on the acquisition instruction sent by the ground information processing station, and the terminal of the Internet of things is awakened to complete acquisition and transmission of the required data.

5. The wide-area low-power internet of things communication method according to claim 4, wherein:

if the satellite radio frequency unit uploads information, the Internet of things terminal module collects data through a sensor data interface and modulates and codes the received effective information; an up-conversion module of the satellite radio frequency unit up-converts the modulated and coded upload data from an L wave band to an L, S, C, X, Ku, Ka or EHF frequency band signal, and a two-dimensional phased array antenna receives and amplifies the frequency-converted upload data and then sends the frequency-converted upload data to a synchronous or medium-low orbit communication satellite;

6. The wide-area low-power internet of things communication method according to claim 4, wherein:

7. The wide-area low-power internet of things communication method according to claim 4, wherein:

the satellite Internet of things gateway station comprises a plurality of multi-channel gateway devices connected in parallel, wherein each multi-channel gateway device comprises a radio frequency branching and branching device, a multi-channel gateway module, a network module and a power module;

when receiving information, the radio frequency branching and branching device is used for receiving satellite internet of things information of the satellite radio frequency unit and branching the satellite internet of things information to the multi-channel gateway module; when the information is sent, the radio frequency combiner is used for combining the satellite Internet of things information of the multi-channel gateway module and then transmitting the combined information to the satellite radio frequency unit; the radio frequency divider and the splitter are also used for transmitting the received signals to a satellite Internet of things module, the satellite Internet of things module is communicated with an external ground network interface through an external data interface, the external ground network interface transmits information to a network control server of a cloud service center through the Internet, and the network control server identifies user information by using the information marks and transmits the information to a specified client through the ground Internet; or the user client applies for information acquisition to a cloud service center network control server through a mobile terminal APP, the network control server transmits a request to a satellite Internet of things gateway station, the satellite Internet of things gateway is appointed to be in satellite connection with a satellite Internet of things terminal of a client needing information acquisition, data of an appointed sensor is collected through an Internet of things terminal station interface, transmitted to a satellite through a radio frequency unit, received by the satellite Internet of things gateway station, transmitted to a cloud service center through a ground network, and forwarded to a user side initiating acquisition signals;

when receiving the information, the network module is used for collecting the baseband information demodulated by the multi-channel gateway module and then transmitting the baseband information to the ground network; when sending information, the network module is used for modulating baseband information transmitted by the ground network and then sending the modulated baseband information to the multi-channel gateway module;

8. The wide-area low-power internet of things communication method according to claim 7, characterized in that:

The multi-channel satellite Internet of things gateway module is used for completing distribution and information transmission of the multi-channel communication module; the access quantity of the Internet of things terminals of one satellite Internet of things communication module is less than 2000; if the number of the terminals which work simultaneously is increased to more than 2000 or the transmission rate exceeds 120kbps, accessing another terminal which needs to communicate into the same gateway or different gateway idle channels; the accessed gateway channel is connected in a ground local area network and is transmitted to a cloud server through the ground network through the Internet;

the cloud server is provided with a network control server, the network control server judges whether a gateway channel is congested according to the access quantity of the gateways and frequency bandwidth resources, if so, the idle channels are sequentially started by a new request according to a convention sequence, otherwise, the idle channels are not required to be started; if all idle channels of one gateway station are occupied, the network control server starts the next satellite Internet of things gateway station; when the next satellite Internet of things gateway station is started, if the next satellite Internet of things gateway station is an authenticated in-network user, the next satellite Internet of things gateway station is in butt joint with the synchronous orbit satellite, and if the next satellite Internet of things gateway station is not an authenticated in-network user, access is denied; the in-network authentication is a network identification number used for identifying access between the terminal and the terminal of the Internet of things.