CN110971551B - Cross-protocol communication platform based on passive sensing technology - Google Patents
Cross-protocol communication platform based on passive sensing technology Download PDFInfo
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- CN110971551B CN110971551B CN201911184234.5A CN201911184234A CN110971551B CN 110971551 B CN110971551 B CN 110971551B CN 201911184234 A CN201911184234 A CN 201911184234A CN 110971551 B CN110971551 B CN 110971551B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L27/00—Modulated-carrier systems
- H04L27/0008—Modulated-carrier systems arrangements for allowing a transmitter or receiver to use more than one type of modulation
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L69/00—Network arrangements, protocols or services independent of the application payload and not provided for in the other groups of this subclass
- H04L69/18—Multiprotocol handlers, e.g. single devices capable of handling multiple protocols
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
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Abstract
The invention discloses a cross-protocol communication platform based on a passive sensing technology, which belongs to the technical field of information systems of the Internet of things and comprises a radio frequency front section, a receiver, a transmitter, a microcontroller and sensing equipment; the receiver is used for decoding received signals and specifically comprises a detector, a peak value finder, a threshold setting circuit and a comparator which are sequentially connected, the transmitter is used for transmitting communication signals of different protocols to realize cross-platform communication, the digital transmission signals output by the microcontroller and the impedance of the matching network are controlled to adjust, and modulation modes adopted by different platform communication protocols are output; according to the invention, multiple modulation modes are realized on one device through a backscattering technology, the device can be adaptively communicated with multiple devices according to requirements, and signals are generated only through the backscattering modulation technology, so that an active effect is played for finally improving the intercommunication among different devices of the Internet of things.
Description
Technical Field
The invention belongs to the technical field of information systems of the Internet of things, relates to a communication platform of the Internet of things, and particularly relates to a cross-protocol communication platform based on a passive sensing technology.
Background
The internet of things, as an extension of information systems to the physical world, expands the ability of human beings to recognize and control the physical world, has been called the third wave of the world information industry following computers and the internet, and is deeply changing the living environment and life style of human beings.
The core task of the internet of things is ubiquitous data sensing, wireless-based data transmission and intelligent data processing, with the development of 5G and big data technologies, large-scale data transmission and processing are no longer factors restricting the application and development of the internet of things, ubiquitous data sensing is the key of the internet of things, especially artificial intelligence and industrial manufacturing 4.0 are vigorously developed under the promotion of the nation, robots and industrial internet of things have more and more related applications, higher requirements are provided for the data sensing of the internet of things, the internet of things needs to realize wider interconnection and intercommunication connections, including connections between mobile phones, computers, information equipment and all intelligent and intelligent physical equipment, communication protocols of different equipment are different, and therefore various connection modes are needed, but the existing technology can only realize information exchange between one communication protocol, and can not autonomously realize free communication among various equipment. For example, the RFID tag is communicated with a reader by using an EPC protocol, but cannot be directly communicated with a mobile phone or a computer, some wearable devices can only be communicated with a special device by using a specific communication protocol, but cannot autonomously select the communication protocol for communication, so that a bottleneck is brought to all intercommunication and connection of the Internet of things. In addition, the internet of things equipment is diversified in types and reaches billions in quantity, but an important problem exists: the node of the internet of things is difficult to supply power for a long time and continuously operate, the working mode of a battery leads to the very limited service life of the node, a large amount of maintenance cost is needed, and because a power supply device is needed, the overall dimension of the node is often greatly limited, the node is difficult to be applied to clothes, shoes, socks and other wearing articles and other similar daily necessities, the expandability and the practicability of the system are directly reduced greatly, especially, the algorithm complexity needed for designing the platform of the internet of things for cross-protocol communication is improved, so that more energy is consumed, the energy problem is also an important consideration factor for designing the cross-protocol communication platform, and therefore, the cross-protocol communication platform with low energy consumption and among various devices can be designed.
The passive sensing system is characterized in that a passive sensing node is not equipped with or mainly depends on self power supply equipment to supply power, energy is obtained from the environment to support calculation, sensing, communication and networking of the passive sensing node, the energy can be from light energy, motion energy and ubiquitous electromagnetic energy, the passive sensing system well solves the energy problem in the Internet of things, the electromagnetic energy node even does not need a transceiver with common active equipment, and an antenna can be used for loading and reflecting transmission of electromagnetic wave signals.
The main problem to be solved for realizing the communication between the cross protocols is that the modulation and demodulation modes adopted by different communication protocols are inconsistent, for example, the EPC protocol specifies that the RFID uses ASK modulation, the bluetooth BLE protocol uses FSK modulation, the Wifi protocol uses QPSK modulation, and the broadcast information uses FM modulation, so as shown in fig. 1, how to design a cross-protocol communication platform can simultaneously generate ASK, PSK, QPSK, FSK, FM and other modulation modes to realize the communication between different devices, and considering the energy factor, the platform cannot carry energy by itself, and needs to work in a passive mode, which is a key problem to be solved, and is a necessary subject to realize the real intercommunication and connection of the internet of things devices.
Disclosure of Invention
The invention overcomes the defects of the prior art, provides a cross-protocol communication platform based on a passive sensing technology, realizes multiple modulation modes on one device through a backscattering technology, can adaptively communicate with multiple devices according to requirements, generates signals through the backscattering modulation technology, and plays an active role in finally improving the mutual communication among different devices of the Internet of things.
In order to achieve the above object, the present invention is achieved by the following technical solutions.
A cross-protocol communication platform based on a passive sensing technology comprises a radio frequency front section, a receiver, a transmitter, a microcontroller and sensing equipment; the receiver decodes a received signal, and specifically comprises a detector, a peak finder, a threshold setting circuit and a comparator which are connected in sequence, wherein the detector is used for removing a carrier part of the received signal, and the peak finder is used for storing a peak value of the received signal in a capacitor; setting a threshold circuit to determine a threshold; finally, the comparator compares the received signal with a threshold value to realize the demodulation of the received signal; the transmitter is used for transmitting communication signals of different protocols to realize cross-platform communication, and the transmitter is used for adjusting by controlling the digital transmission signal output by the microcontroller and the impedance of the matching network and outputting modulation modes adopted by different platform communication protocols.
Preferably, the modulation method adopted by the output of different platform communication protocols is as follows: ASK modulation, FSK modulation, QPSK modulation, and FM modulation.
Preferably, the radio frequency front end is used for collecting and managing energy, and includes an antenna, a capacitor, an impedance matching network, a boost pump, a level converter and an energy storage, and the collected energy is stored in the capacitor.
Preferably, the microcontroller is a low power consumption processor, and is configured to process the decoded signal and generate a sending digital signal; the sensing equipment senses the environment, the sensing data are embedded into the data of the micro controller, and finally the sensing data are transmitted through the backscattering signals.
Preferably, the communication platform adopts a self-adaptive backscattering mechanism, the self-adaptive backscattering mechanism comprises testing and estimating the channel state and corresponding the channel state to the modulation mode, the channel state is judged by judging the intensity of the received signal and the data received by the platform sensor, the channel state is corresponding to the modulation mode by adopting a look-up table mode, and the modulation mode is adjusted up or down according to the error rate by transmitting a section of data.
Compared with the prior art, the invention has the beneficial effects that.
The invention designs a passive sensing technology and a cross-protocol communication platform, realizes multiple modulation modes on one device through a backscattering technology, can adaptively communicate with multiple devices according to requirements, and plays an active role in finally improving the mutual communication among different devices of the Internet of things by only generating signals through the backscattering modulation technology in consideration of the fact that the platform works in a passive environment.
Drawings
FIG. 1 is a cross-protocol communication model.
Fig. 2 is a general framework diagram of the cross-protocol communication platform according to the present invention.
Fig. 3 is a schematic diagram of a cross-protocol communication platform receiver according to the present invention.
Fig. 4 is a schematic diagram of a cross-protocol communication platform transmitter according to the present invention.
Detailed Description
In order to make the technical problems, technical solutions and advantageous effects to be solved by the present invention more clearly apparent, the present invention is further described in detail with reference to the embodiments and the accompanying drawings. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention. The technical solution of the present invention is described in detail below with reference to the embodiments and the drawings, but the scope of protection is not limited thereto.
The overall framework of the cross-protocol communication platform based on the passive sensing technology is shown in fig. 2, and the platform mainly comprises four parts, namely: (1) The radio frequency front section is responsible for collecting energy and managing the energy, the collected energy is mainly stored in a capacitor, and an antenna, an impedance matching network, a booster pump, a level converter and an energy storage device are needed; (2) The receiver decodes the received signals, the received signals comprise signals such as communication protocol types required to be generated next step, the rate required to be transmitted by the signals and the like, all devices of the receiver adopt passive devices in consideration of energy consumption, and the decoding also needs a low-power consumption mode. (3) And the transmitter is used for transmitting communication signals of different protocols to realize cross-platform communication, and mainly can adjust through controlling the digital transmission signal output by the microcontroller and the impedance of the matching network. (4) The microcontroller and the sensing equipment realize simple calculation and perception, the microcontroller uses an MSP430 low-power-consumption processor to mainly process decoded signals and generate sending digital signals, and the sensing equipment can sense the environment, embeds sensing data into the data of the microcontroller and finally transmits the sensing data through backscattering signals.
The invention mainly focuses on the design of a receiver, a transmitter and an adaptive adjusting mechanism, and the specific implementation mode is as follows:
(1) Cross-protocol communication platform receiver design
The receiver mainly comprises four components, as shown in fig. 3, wherein: the envelope detector is used for removing a carrier part of a received signal, the device comprises a diode and a capacitor, and envelope detection is realized by reasonably designing a debugging value to enable the frequency of the debugging value to be consistent with the frequency of a modulation signal in the received signal; a peak finder which mainly functions to store a peak value of the received signal in the capacitor; setting a threshold circuit to achieve halving of the threshold; finally, the comparator compares the received signal with a threshold value, when the received signal is greater than the threshold value, the output is 1, and when the received signal is less than the threshold value, the output is 0, so that the demodulation of the received signal is realized. In the design process, the platform works under the passive condition, so that the energy is less, and all devices are passive low-power-consumption devices.
(2) Trans-protocol communication platform transmitter design
The digital transmission signal output by the microcontroller and the impedance of the matching network are controlled to adjust, wherein the matching network is designed as shown in fig. 4, the corresponding impedance is selected according to the signal to be transmitted, and the impedance value is determined according to the radar cross-sectional area and the reflection system which need to be achieved and calculated by using Smith V3.10 software. The communication with the RFID reader, the Wifi equipment and the Bluetooth equipment is realized by digital transmission signals output by a control microcontroller, and common binary signals, signals with time delay and binary signals with inconsistent frequencies are output respectively; the M-QAM modulation is realized by adjusting the impedance of a matching network and selecting different conditions required by different impedance matching by using a single-pole multi-throw switch.
(3) Adaptive backscattering mechanism design
In order to optimize the throughput of a cross-protocol communication platform and design a strategy capable of adaptively adjusting a modulation mode according to a real-time channel state to achieve the maximum throughput under the condition of ensuring an error rate, wherein the two aspects of the design are included, the first aspect is that the channel state needs to be tested and estimated, the channel state is judged by judging the intensity of a received signal and data received by a platform sensor, the second aspect is that the channel state corresponds to the modulation mode by adopting a look-up table mode, and the modulation mode is adjusted up or down according to the error rate by transmitting a section of data.
The invention designs a passive sensing technology and a cross-protocol communication platform, realizes multiple modulation modes on one device through a backscattering technology, can adaptively communicate with multiple devices according to requirements, and plays an active role in finally improving the mutual communication among different devices of the Internet of things by only generating signals through the backscattering modulation technology in consideration of the fact that the platform works in a passive environment.
While the invention has been described in further detail with reference to specific preferred embodiments thereof, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (5)
1. A cross-protocol communication platform based on a passive sensing technology is characterized by comprising a radio frequency front section, a receiver, a transmitter, a microcontroller and sensing equipment; the receiver decodes a received signal, and specifically comprises a detector, a peak finder, a threshold setting circuit and a comparator which are connected in sequence, wherein the detector is used for removing a carrier part of the received signal, and the peak finder is used for storing a peak value of the received signal in a capacitor; setting a threshold circuit to determine a threshold; finally, the comparator compares the received signal with a threshold value to realize the demodulation of the received signal; the transmitter is used for transmitting communication signals of different protocols to realize cross-platform communication, and the digital transmission signals output by the microcontroller and the impedance of the matching network are controlled to adjust and output modulation modes adopted by different platform communication protocols.
2. The cross-protocol communication platform based on the passive sensing technology according to claim 1, wherein the modulation mode adopted for outputting different platform communication protocols is as follows: ASK modulation, FSK modulation, QPSK modulation, and FM modulation.
3. The cross-protocol communication platform based on the passive sensing technology of claim 1, wherein the radio frequency front-end is used for energy collection and energy management, the radio frequency front-end comprises an antenna, a capacitor, an impedance matching network, a booster pump, a level converter and an energy storage, and the collected energy is stored in the capacitor.
4. The cross-protocol communication platform based on the passive sensing technology is characterized in that the microcontroller is a low-power processor and is used for processing the decoded signals and generating sending digital signals; the sensing equipment senses the environment, the sensing data is embedded into the data of the micro controller, and finally the sensing data is transmitted through a backscattering signal.
5. The cross-protocol communication platform based on the passive sensing technology as claimed in claim 1, wherein the communication platform employs an adaptive backscattering mechanism, the adaptive backscattering mechanism includes test estimation of a channel state and correspondence between the channel state and a modulation mode, the channel state is determined by determining received signal strength and data received by a platform sensor, the channel state is corresponding to the modulation mode by employing a look-up table, and the modulation mode is adjusted up or down according to an error rate of a section of data transmitted.
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| CN115398929B (en) * | 2020-07-10 | 2024-06-18 | Oppo广东移动通信有限公司 | Control method and communication device of Internet of things equipment |
| CN112904710B (en) * | 2021-01-20 | 2022-07-01 | 太原理工大学 | Low-power consumption method of mining Internet of things sensor based on data energy conservation |
| CN113031745B (en) * | 2021-03-25 | 2022-09-06 | 中国电子科技集团公司第五十四研究所 | Environment electromagnetic energy acquisition oriented ultra-low power consumption operation method for Internet of things |
| CN113098441B (en) * | 2021-03-30 | 2023-01-24 | 太原理工大学 | Electromagnetic wave optimization model based on particle filter algorithm |
| EP4383598A1 (en) * | 2021-08-04 | 2024-06-12 | Guangdong Oppo Mobile Telecommunications Corp., Ltd. | Wireless communication method, terminal device and network device |
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