CN110995956B - Image transmission method and device based on LoRa, computer equipment and storage medium - Google Patents
Image transmission method and device based on LoRa, computer equipment and storage medium Download PDFInfo
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- CN110995956B CN110995956B CN201911241926.9A CN201911241926A CN110995956B CN 110995956 B CN110995956 B CN 110995956B CN 201911241926 A CN201911241926 A CN 201911241926A CN 110995956 B CN110995956 B CN 110995956B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N1/00—Scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission; Details thereof
- H04N1/00095—Systems or arrangements for the transmission of the picture signal
- H04N1/00103—Systems or arrangements for the transmission of the picture signal specially adapted for radio transmission, e.g. via satellites
Abstract
The application relates to a picture transmission method, a picture transmission device, computer equipment and a storage medium based on LoRa, wherein the method comprises the following steps: acquiring a picture transmission request based on LoRa, wherein the request comprises picture data to be transmitted; sub-packaging the picture data to be transmitted according to the request to obtain a plurality of picture data packets, and transmitting all the sub-packaged picture data packets to corresponding gateways at one time; the gateway acquires the plurality of picture data packets, sequentially checks the acquired picture data packets and records a check result; returning the serial number corresponding to the picture data packet with the problem of the verification result to the corresponding node; and the node transmits the corresponding problematic picture data packet according to the number sent by the gateway. The invention greatly saves the picture transmission time, improves the picture transmission efficiency, improves the system performance as much as possible and reduces the occupancy rate of gateway resources.
Description
Technical Field
The invention relates to the technical field of internet of things, in particular to a picture transmission method and device based on LoRa, computer equipment and a storage medium.
Background
At present, a Low Power Wide Area Network (LPWAN) technology is used as a new internet of things wireless access technology, and compared with a traditional wireless technology, the LPWAN technology has the advantages of long transmission distance, low power consumption, low cost, large coverage capacity and the like, and is suitable for application occasions of long distance, low power and low data transmission rate. LPWAN technologies include LoRa, SigFox, LTE-M, NB-IoT, Weightless, and the like. The LoRa is a novel ultra-long-distance low-power-consumption data transmission technology proposed by Semtech corporation, the working frequency band of the LoRa is below 1GHz, and the LoRa has the characteristics of interference resistance, strong confidentiality, multipath effect resistance and the like by adopting a linear spread spectrum modulation technology. The wireless communication system is high in receiving sensitivity, solves the problem that the traditional wireless communication design scheme cannot give consideration to distance, interference resistance and power consumption at the same time, and has wide application scenes.
In the conventional technology, LoRa data transmission is realized by transmitting data to a gateway through a node, the gateway checks the data from the node, and sends a response to the node after judging that the data has no problem, so that the node knows that the gateway has correctly received the data which is just sent, then the node transmits the next packet of data again, otherwise, the node retransmits the previous packet of data and circulates in sequence, and thus, each packet of data can be ensured to have no problem.
However, in the experiment, the size of the picture photographed by the camera is generally 200Kbyte, the picture is stored in the SD card, the maximum data load of each packet of LoRa is 256 bytes, and the 256 bytes require information of the data packet in addition to the picture data, so the effective picture data of each packet can only be about 240 bytes, and then one 200Kbyte picture needs to be split into 800 packets of data for transmission, LoRa communication is a low-power wide-area low-speed transmission technology, which is time-consuming when using a traditional transmission scheme, increases the power consumption of the system, and greatly occupies the resources of the gateway.
Disclosure of Invention
In view of the foregoing, it is desirable to provide a picture transmission method, device, computer device and storage medium based on LoRa, which can improve picture transmission efficiency.
A picture transmission method based on LoRa, the method comprising:
acquiring a picture transmission request based on LoRa, wherein the request comprises picture data to be transmitted;
sub-packaging the picture data to be transmitted according to the request to obtain a plurality of picture data packets, and transmitting all the sub-packaged picture data packets to corresponding gateways at one time;
the gateway acquires the plurality of picture data packets, sequentially checks the acquired picture data packets and records a check result;
returning the serial number corresponding to the picture data packet with the problem of the verification result to the corresponding node;
and the node transmits the corresponding problematic picture data packet according to the number sent by the gateway.
In one embodiment, the step of packetizing the picture data to be transmitted according to the request to obtain a plurality of picture data packets further includes:
each picture data packet also comprises a number corresponding to the picture data packet, and the number is used for distinguishing different picture data packets.
In one embodiment, the step of acquiring, by the gateway, the plurality of picture data packets, sequentially verifying the acquired picture data packets, and recording a verification result further includes:
the gateway receives the plurality of picture data packets in sequence;
when each picture data packet is transmitted, performing CRC (cyclic redundancy check) on the picture data packet to judge whether the picture data packet has a problem or not;
and recording the numbers corresponding to all the picture data packets with problems.
In one embodiment, the node transmits the corresponding problematic picture data packet according to the number sent by the gateway, and the method comprises the following steps:
the node acquires a feedback message sent by a gateway;
and according to the number of the picture data packet in the feedback message, resending the picture data packet corresponding to the number to the corresponding gateway.
A LoRa-based picture transfer device, the device comprising:
the acquisition module is used for acquiring a picture transmission request based on LoRa, and the request comprises picture data to be transmitted;
the sub-packaging module is used for sub-packaging the picture data to be transmitted according to the request to obtain a plurality of picture data packages and sending all the sub-packaged picture data packages to the corresponding gateways at one time;
the checking module is used for the gateway to acquire the plurality of picture data packets, check the acquired picture data packets in sequence and record checking results;
the return module is used for returning the serial number corresponding to the picture data packet with the problem of the verification result to the corresponding node;
and the transmission module is used for transmitting the corresponding problematic picture data packet by the node according to the serial number sent by the gateway.
In one embodiment, the packetization module is further configured to:
and performing sub-packaging on the picture data to be transmitted to obtain a plurality of picture data packets, wherein each picture data packet further comprises a number corresponding to the picture data packet, and the number is used for distinguishing different picture data packets.
In one embodiment, the verification module is further configured to:
the gateway receives the plurality of picture data packets in sequence;
when each picture data packet is transmitted, performing CRC (cyclic redundancy check) on the picture data packet to judge whether the picture data packet has a problem or not;
and recording the numbers corresponding to all the picture data packets with problems.
In one embodiment, the transmission module is further configured to:
the node acquires a feedback message sent by a gateway;
and according to the number of the picture data packet in the feedback message, resending the picture data packet corresponding to the number to the corresponding gateway.
A computer device comprising a memory, a processor and a computer program stored on the memory and executable on the processor, the processor implementing the steps of any of the above methods when executing the computer program.
A computer-readable storage medium, on which a computer program is stored which, when being executed by a processor, carries out the steps of any of the methods described above.
According to the image transmission method and device based on the LoRa, the computer equipment and the storage medium, the image transmission request based on the LoRa is obtained, and the request comprises the image data to be transmitted; sub-packaging the picture data to be transmitted according to the request to obtain a plurality of picture data packets, and transmitting all the sub-packaged picture data packets to corresponding gateways at one time; the gateway acquires the plurality of picture data packets, sequentially checks the acquired picture data packets and records a check result; returning the serial number corresponding to the picture data packet with the problem of the verification result to the corresponding node; and the node transmits the corresponding problematic picture data packet according to the number sent by the gateway. According to the invention, through recording the number corresponding to the problematic picture data packet, the node only transmits the problematic data packet after receiving the feedback message of the gateway, so that the picture transmission time is greatly saved, the picture transmission efficiency is improved, the system performance is improved as much as possible, and the occupancy rate of gateway resources is reduced.
Drawings
FIG. 1 is a diagram of an application environment of an image transmission method based on LoRa in an embodiment;
FIG. 2 is a block diagram of a hardware configuration of a LoRa-based picture transmission system in one embodiment;
FIG. 3 is a flow chart illustrating an exemplary LoRa-based image transmission method;
FIG. 4 is a flow chart illustrating a LoRa-based image transmission method according to another embodiment;
FIG. 5 is a flow chart illustrating a LoRa-based image transmission method according to yet another embodiment;
FIG. 6 is a block diagram of an exemplary picture transmission device based on LoRa;
FIG. 7 is a diagram illustrating an internal structure of a computer device according to an embodiment.
Detailed Description
In order to make the objects, technical solutions and advantages of the present application more apparent, the present application is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application.
At present, in traditional LoRa data transmission, a node transmits data to a gateway, the gateway performs CRC check on the data from the node, and sends a response to the node after judging that the data has no problem, so that the node knows that the gateway has correctly received the data which has just been sent, and then the node transmits the next packet of data again, otherwise, the node retransmits the previous packet of data and circulates in sequence, thereby ensuring that each packet of data has no problem. However, in the actual transmission process, since one picture usually includes hundreds of picture data packets, it is time-consuming to sequentially check and re-upload the data packets, and the power consumption of the system is increased, and the resources of the gateway are greatly occupied. Based on this, the invention provides an image transmission method based on LoRa, aiming to solve the technical problems.
The picture transmission method based on LoRa provided by the present invention can be applied to the application environment shown in fig. 1, and the application environment includes: server 110, gateway device 120, and node device 130. Specifically, a hardware structure block diagram of each part may be as shown in fig. 2. Wherein, node device 130 includes power module, camera module, MCU module, and the loRa module, wherein MCU uses is stm 32. Gateway device 120 includes power module, net gape module, MCU module, and the loRa module, wherein MCU uses is stm 32. The node apparatus 130 communicates with the gateway apparatus 120 via the LoRa module, and the gateway apparatus 120 communicates with the server 110 via the portal module.
In one embodiment, as shown in fig. 3, there is provided a picture transmission method based on LoRa, where the method applied in the application environment shown in fig. 1 includes:
step 302, acquiring a picture transmission request based on LoRa, wherein the request comprises picture data to be transmitted;
step 304, performing sub-packaging on the picture data to be transmitted to obtain a plurality of picture data packets, and transmitting all the sub-packaged picture data packets to corresponding gateways at one time;
step 306, the gateway acquires a plurality of picture data packets, checks the acquired picture data packets in sequence and records the checking result;
step 308, returning the serial numbers corresponding to the image data packets with the problems in the verification result to the corresponding nodes;
and step 310, the node transmits the corresponding problematic picture data packet according to the number sent by the gateway.
Specifically, first, the node device can collect an environment picture through the camera, for example, collect a farmland leaf picture, collect corresponding picture data through the camera, and the picture data can be stored in the SD card. And then, acquiring a picture transmission request based on LoRa, subpackaging the corresponding picture data to be transmitted according to the specific content in the request to obtain a plurality of picture data packets, and transmitting all the subpackaged picture data packets to the corresponding gateways at one time.
In a specific embodiment, the step of packetizing the picture data to be transmitted according to a request to obtain a plurality of picture data packets further includes: each picture data packet also comprises a number corresponding to the picture data packet, and the number is used for distinguishing different picture data packets.
Then, the gateway device acquires a plurality of picture data packets, sequentially checks the acquired picture data packets, and records the check result. The gateway acquires all picture data packets of the picture, checks each picture data packet in sequence, records a number corresponding to the data packet if a data packet with a problem is checked, and records the number until all the picture data packets of the picture are checked. After all the verification is finished, the gateway returns the number corresponding to the picture data packet with the problem in the verification result to the corresponding node, the node searches the corresponding picture data packet according to the number sent by the gateway, and the corresponding picture data packet with the problem is sent to the gateway again.
In the embodiment, by obtaining a picture transmission request based on LoRa, the request includes picture data to be transmitted; the method comprises the steps that the picture data to be transmitted are subjected to sub-packaging according to a request to obtain a plurality of picture data packets, and all the sub-packaged picture data packets are sent to corresponding gateways at one time; the gateway acquires a plurality of picture data packets, sequentially checks the acquired picture data packets and records a check result; returning the serial number corresponding to the picture data packet with the problem of the verification result to the corresponding node; and the node transmits the corresponding problematic picture data packet according to the number sent by the gateway. In the embodiment, the serial numbers corresponding to the problematic picture data packets are recorded, and the nodes only transmit the problematic data packets after receiving the feedback message of the gateway, so that the picture transmission time is greatly saved, the picture transmission efficiency is improved, the system performance is improved as much as possible, and the occupancy rate of gateway resources is reduced.
In an embodiment, as shown in fig. 4, a picture transmission method based on LoRa is provided, where the step of acquiring, by a gateway, a plurality of picture data packets, sequentially verifying the acquired picture data packets, and recording a verification result further includes:
step 402, the gateway receives a plurality of picture data packets in sequence;
step 404, when each picture data packet is transmitted, performing CRC check on the picture data packet to judge whether the picture data packet has a problem;
and step 406, recording the numbers corresponding to all the problematic picture data packets.
In one embodiment, as shown in fig. 5, a picture transmission method based on LoRa is provided, where a node transmits a corresponding problematic picture data packet according to a number sent by a gateway, where the method includes:
step 502, a node acquires a feedback message sent by a gateway;
and step 504, according to the number of the picture data packet in the feedback message, resending the picture data packet corresponding to the number to the corresponding gateway.
In the above-described embodiment, first, the picture data is directly packetized and then the picture data is transmitted all at once. Then, the gateway receives all the photo data in sequence, judges whether the data packet has a problem or not through CRC check when each packet data is transmitted, records the problem, sends the data packet number with the problem to the node when the node completely sends the data packet of one photo, and only transmits the data packet with the problem after the node receives the feedback message of the gateway, so that the picture transmission time is greatly saved, and the system performance is improved as much as possible.
It should be understood that although the various steps in the flow charts of fig. 3-5 are shown in order as indicated by the arrows, the steps are not necessarily performed in order as indicated by the arrows. The steps are not performed in the exact order shown and described, and may be performed in other orders, unless explicitly stated otherwise. Moreover, at least some of the steps in fig. 3-5 may include multiple sub-steps or multiple stages that are not necessarily performed at the same time, but may be performed at different times, and the order of performance of the sub-steps or stages is not necessarily sequential, but may be performed in turn or alternating with other steps or at least some of the sub-steps or stages of other steps.
In one embodiment, as shown in fig. 6, there is provided a LoRa-based picture transmission apparatus 600, including:
an obtaining module 601, configured to obtain a picture transmission request based on LoRa, where the request includes picture data to be transmitted;
the sub-packaging module 602 is used for sub-packaging the picture data to be transmitted according to the request to obtain a plurality of picture data packets, and transmitting all the sub-packaged picture data packets to the corresponding gateways at one time;
the checking module 603 is configured to acquire a plurality of picture data packets by the gateway, check the acquired picture data packets in sequence, and record a checking result;
a returning module 604, configured to return a number corresponding to the picture data packet with the problem in the check result to a corresponding node;
and a transmission module 605, configured to transmit the corresponding problematic picture data packet according to the number sent by the gateway by the node.
In one embodiment, the packetization module 602 is further to:
and performing sub-packaging on the picture data to be transmitted to obtain a plurality of picture data packets, wherein each picture data packet further comprises a number corresponding to the picture data packet, and the number is used for distinguishing different picture data packets.
In one embodiment, the verification module 603 is further configured to:
the gateway receives a plurality of picture data packets in sequence;
when each picture data packet is transmitted, performing CRC (cyclic redundancy check) on the picture data packet to judge whether the picture data packet has a problem or not;
and recording the numbers corresponding to all the picture data packets with problems.
In one embodiment, the transmission module 605 is further configured to:
a node acquires a feedback message sent by a gateway;
and according to the number of the picture data packet in the feedback message, resending the picture data packet corresponding to the number to the corresponding gateway.
For specific limitations of the LoRa-based image transmission device, reference may be made to the above limitations of the LoRa-based image transmission method, which are not described herein again.
In one embodiment, a computer device is provided, the internal structure of which may be as shown in FIG. 7. The computer apparatus includes a processor, a memory, and a network interface connected by a device bus. Wherein the processor of the computer device is configured to provide computing and control capabilities. The memory of the computer device comprises a nonvolatile storage medium and an internal memory. The nonvolatile storage medium stores an operating device, a computer program, and a database. The internal memory provides an environment for the operation device in the nonvolatile storage medium and the execution of the computer program. The network interface of the computer device is used for communicating with an external terminal through a network connection. The computer program is executed by a processor to implement a LoRa-based picture transmission method.
Those skilled in the art will appreciate that the architecture shown in fig. 7 is merely a block diagram of some of the structures associated with the disclosed aspects and is not intended to limit the computing devices to which the disclosed aspects apply, as particular computing devices may include more or less components than those shown, or may combine certain components, or have a different arrangement of components.
In one embodiment, a computer device is provided, comprising a memory, a processor and a computer program stored on the memory and executable on the processor, the processor implementing the steps of the above method embodiments when executing the computer program.
In one embodiment, a computer-readable storage medium is provided, on which a computer program is stored, which, when being executed by a processor, carries out the steps of the above respective method embodiments.
It will be understood by those skilled in the art that all or part of the processes of the methods of the embodiments described above can be implemented by hardware instructions of a computer program, which can be stored in a non-volatile computer-readable storage medium, and when executed, can include the processes of the embodiments of the methods described above. Any reference to memory, storage, database, or other medium used in the embodiments provided herein may include non-volatile and/or volatile memory, among others. Non-volatile memory can include read-only memory (ROM), Programmable ROM (PROM), Electrically Programmable ROM (EPROM), Electrically Erasable Programmable ROM (EEPROM), or flash memory. Volatile memory can include Random Access Memory (RAM) or external cache memory. By way of illustration and not limitation, RAM is available in a variety of forms such as Static RAM (SRAM), Dynamic RAM (DRAM), Synchronous DRAM (SDRAM), Double Data Rate SDRAM (DDRSDRAM), Enhanced SDRAM (ESDRAM), Synchronous Link DRAM (SLDRAM), Rambus Direct RAM (RDRAM), direct bus dynamic RAM (DRDRAM), and memory bus dynamic RAM (RDRAM).
The technical features of the above embodiments can be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the above embodiments are not described, but should be considered as the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several embodiments of the present application, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the concept of the present application, which falls within the scope of protection of the present application. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (4)
1. A picture transmission method based on LoRa is characterized by comprising the following steps:
acquiring a picture transmission request based on LoRa, wherein the request comprises picture data to be transmitted;
sub-packaging the picture data to be transmitted according to the request to obtain a plurality of picture data packets, and transmitting all the sub-packaged picture data packets to corresponding gateways at one time; each picture data packet also comprises a number corresponding to the picture data packet, and the number is used for distinguishing different picture data packets;
the gateway acquires the plurality of picture data packets, sequentially checks the acquired picture data packets and records a check result;
returning the serial number corresponding to the picture data packet with the problem of the verification result to the corresponding node;
the node transmits a corresponding problematic picture data packet according to the number sent by the gateway;
the steps of the gateway acquiring the plurality of picture data packets, sequentially checking the acquired picture data packets and recording the checking result further comprise: the gateway receives the plurality of picture data packets in sequence; when each picture data packet is transmitted, performing CRC (cyclic redundancy check) on the picture data packet to judge whether the picture data packet has a problem or not; recording the corresponding serial numbers of all the picture data packets with problems;
the node transmits the corresponding problematic picture data packet according to the number sent by the gateway, and the method comprises the following steps: the node acquires a feedback message sent by a gateway; and according to the number of the picture data packet in the feedback message, resending the picture data packet corresponding to the number to the corresponding gateway.
2. An apparatus for picture transmission based on LoRa, the apparatus comprising:
the acquisition module is used for acquiring a picture transmission request based on LoRa, and the request comprises picture data to be transmitted;
the sub-packaging module is used for sub-packaging the picture data to be transmitted according to the request to obtain a plurality of picture data packages and sending all the sub-packaged picture data packages to the corresponding gateways at one time; each picture data packet also comprises a number corresponding to the picture data packet, and the number is used for distinguishing different picture data packets;
the checking module is used for the gateway to acquire the plurality of picture data packets, check the acquired picture data packets in sequence and record checking results;
the return module is used for returning the serial number corresponding to the picture data packet with the problem of the verification result to the corresponding node;
the transmission module is used for the node to transmit the corresponding problematic picture data packet according to the serial number sent by the gateway;
the verification module is further configured to: the gateway receives the plurality of picture data packets in sequence; when each picture data packet is transmitted, performing CRC (cyclic redundancy check) on the picture data packet to judge whether the picture data packet has a problem or not; recording the corresponding serial numbers of all the picture data packets with problems;
the transmission module is further configured to: the node acquires a feedback message sent by a gateway; and according to the number of the picture data packet in the feedback message, resending the picture data packet corresponding to the number to the corresponding gateway.
3. A computer device comprising a memory, a processor and a computer program stored on the memory and executable on the processor, wherein the steps of the method of claim 1 are implemented when the computer program is executed by the processor.
4. A computer-readable storage medium, on which a computer program is stored, which, when being executed by a processor, carries out the steps of the method as claimed in claim 1.
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| CN112367148B (en) * | 2020-10-22 | 2022-05-17 | 华南农业大学 | Large-area hillside orchard LoRa wireless transmission frame loss detection method and device |
| CN112468407A (en) * | 2020-12-15 | 2021-03-09 | 东莞中国科学院云计算产业技术创新与育成中心 | Data subpackage transmission method and device, computer equipment and storage medium |
| CN113573266A (en) * | 2021-08-12 | 2021-10-29 | 北京国网富达科技发展有限责任公司 | Big data transmission method and system based on narrow-band Internet of things transmission technology |
| CN114613081B (en) * | 2022-03-15 | 2022-12-13 | 郑州大学 | Self-service inspection result printing device based on wireless communication |
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