CN108173920B - LORAWAN-based file transmission method - Google Patents
LORAWAN-based file transmission method Download PDFInfo
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- CN108173920B CN108173920B CN201711407588.2A CN201711407588A CN108173920B CN 108173920 B CN108173920 B CN 108173920B CN 201711407588 A CN201711407588 A CN 201711407588A CN 108173920 B CN108173920 B CN 108173920B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L67/00—Network arrangements or protocols for supporting network services or applications
- H04L67/01—Protocols
- H04L67/06—Protocols specially adapted for file transfer, e.g. file transfer protocol [FTP]
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
- H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
- H04L1/18—Automatic repetition systems, e.g. Van Duuren systems
- H04L1/1812—Hybrid protocols; Hybrid automatic repeat request [HARQ]
- H04L1/1816—Hybrid protocols; Hybrid automatic repeat request [HARQ] with retransmission of the same, encoded, message
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L67/00—Network arrangements or protocols for supporting network services or applications
- H04L67/50—Network services
- H04L67/56—Provisioning of proxy services
- H04L67/565—Conversion or adaptation of application format or content
- H04L67/5651—Reducing the amount or size of exchanged application data
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Abstract
The embodiment of the invention relates to the technical field of communication, and particularly discloses a LORAWAN-based file transmission method, which comprises the steps of sending a file uploading request packet to a LORAWAN gateway through a network server; after receiving the file uploading request packet, the LORAWAN gateway responds to the file uploading request packet and transmits the file uploading request packet to the network server; after receiving the file uploading request packet, the network server divides the file to be sent into a plurality of data packets which meet the uploading requirements of the LORAWAN gateway file; and the network server sends the data packets to the LORAWAN gateway one by one until the file to be sent is sent completely. The method and the system have the advantages that better reliability is realized when the LORAWAN gateway and the network server transmit the data files, and the integrity and the transmission efficiency of the data are ensured.
Description
Technical Field
The invention relates to the technical field of communication, in particular to a file transmission method based on LORAWAN.
Background
The LoRa technology is an ultra-long distance and low power consumption solution of the internet of things provided by Semtech corporation. The LORA gateway is the core of LORA network, and is the bridge between the terminal and the network server, and is also a multi-channel transceiver. The LORAWANLORAWAN gateway is connected with the network server through a standard IP, more protocols adopted between the LORAWANLORAWAN gateway and the network server are realized based on a UDP (user Datagram protocol), the file transmission efficiency can be higher by using the UDP, but the UDP has the problems of poor reliability, such as transmission data packet loss and message tampering, and the problem that only a single data message transmission mechanism and a data retransmission mechanism are few when the UDP transmits files.
Disclosure of Invention
In view of the above, the present application provides a more reliable method for transmitting files based on LORAWAN, aiming at the above problems existing in the prior art that files are transmitted by using UDP protocol.
In order to solve the technical problems, the technical scheme provided by the invention is a file transmission method based on a LORAWAN, which is applied to a network server and a LORAWAN gateway and comprises the following steps:
s11: the network server sends a file uploading request packet to a LORAWAN gateway;
s12: after receiving the file uploading request packet, the LORAWAN gateway responds to the file uploading request packet and transmits the file uploading request packet to a network server; the LORAWAN gateway creates a corresponding file for storing the data packet received from the network server;
s13: after receiving the file uploading request packet, the network server divides the file to be sent into a plurality of data packets which meet the uploading requirements of the LORAWAN gateway file;
s14: and the network server sends the data packets to the LORAWAN gateway one by one until the file to be sent is sent completely.
Preferably, in step S11, the file upload request package includes a file name, a file size, and a file sub-package size of the file to be transmitted.
Preferably, in step S12, the file upload request package includes a file size and a file sub-package size of the file acceptable by the LORAWAN gateway.
Preferably, in step S14, the method for the network server to send data packets to the LORAWAN gateway one by one until the file to be sent is sent completely includes:
s141: the network server divides the data packets into a plurality of data packets according to a preset batch number;
s142: and the network server sends data packets to the LORAWAN gateway batch by batch until the file to be sent is sent completely.
Preferably, in step S142, the method for the network server to send the data packets to the LORAWAN gateway batch by batch until the file to be sent is sent completely includes:
s1421: the network server continuously sends a batch of data packets to the LORAWAN gateway;
s1422: the network server sends the batch data packet loss query packet to a LORAWAN gateway;
s1423: the LORAWAN gateway checks whether the data packets in the batch of data packets are lost, if not, step S1425 is performed, and if yes, step S1424 is performed;
s1424: the LORAWAN gateway responds to the number of the missing data packets and the number of the missing data packets to the network server, and the network server retransmits the missing data packets in the data packets to the LORAWAN gateway, and then the step S1422 is performed;
s1425: the LORAWAN gateway responds to the network server that the data packets in the batch of data packets are not lost; the network server checks whether the file to be sent is sent completely, if not, the step S1426 is executed; if yes, go to step S1427;
s1426: the network server continuously sends the next batch of data packets to the LORAWAN gateway, and proceeds to step 1422;
s1427, the network server sends the packet loss query packet of the data packets with the packet number of 0 to the LORAWAN gateway, and the LORAWAN gateway responds that the data packets are not lost to the network server, and then the file to be sent is sent completely.
The invention also provides a file transmission method based on LORAWAN, which is applied to a network server and a LORAWAN gateway and comprises the following steps:
s21: the network server sends a file downloading request packet to a LORAWAN gateway;
s22: after receiving the file downloading request packet, the LORAWAN gateway responds to a file downloading confirmation packet to the network server; the LORAWAN gateway divides the file to be downloaded into a plurality of data packets;
s23: after the network server receives the file download confirmation packet, the network server creates a corresponding file for storing the data packet received from the LORAWAN gateway;
s24: and the LORAWAN gateway sends the data packets to the network server one by one until the file to be downloaded is sent completely.
More preferably, in the step S21, the file download request packet includes a file name of the file to be downloaded.
More preferably, in step S22, the file download confirmation package includes the file name, the file size, and the file packetization size of the file to be downloaded.
Preferably, in step S24, the method for the LORAWAN gateway to send data packets to the network server one by one until the file to be downloaded is sent completely includes:
s241: dividing a plurality of data packets into a plurality of data packets by the LORAWAN gateway according to a preset batch number;
s242: and the LORAWAN gateway sends the data packets to the network server batch by batch until the file to be downloaded is sent completely.
Preferably, in step S242, the method for sending the data packets to the network server by the LORAWAN gateway batch by batch until the file to be downloaded is sent completely includes:
s2421: the LORAWAN gateway continuously sends a batch of data packets to a network server;
s2422: the LORAWAN gateway sends the batch of data packet loss query packets to a network server;
s2423: the network server checks whether the data packets in the batch of data packets are lost, if not, the step S2425 is carried out, and if so, the step S2424 is carried out;
s2424: the network server responds to the number of the lost data packets and the number of the lost data packets to the LORAWAN gateway, the LORAWAN gateway retransmits the lost data packets in the data packets to the network server, and the step S2422 is executed;
s2425: the network server responds to the LORAWAN gateway that the data packets in the batch of data packets are not lost, the LORAWAN gateway checks whether the file to be downloaded is sent completely, and if not, the step S2426 is executed; if yes, go to step S2427;
s2426: the LORAWAN gateway continuously sends next batch of data packets to the network server, and the step S2422 is entered;
s2427: and the LORAWAN gateway sends the batch of data packet lost inquiry packets with the packet number of 0 to the LORAWAN gateway, the network server responds to the data packets which are not lost in the batch of data packets to the LORAWAN gateway, and the transmission of the file to be downloaded is finished.
Compared with the prior art, the beneficial effects of the method are detailed as follows: the method and the system have the advantages that better reliability is realized during data file transmission between the LORAWAN gateway and the network server, and better data integrity and transmission efficiency are realized during data transmission.
Drawings
Fig. 1 is a schematic flow chart of a file transmission method based on LORAWAN according to an embodiment of the present invention;
fig. 2 is a schematic flow chart of a method for a network server to send data packets to a LORAWAN gateway one by one according to an embodiment of the present invention;
fig. 3 is a flowchart illustrating a method for a network server to send packets to a LORAWAN gateway batch by batch according to an embodiment of the present invention;
FIG. 4 is a flowchart illustrating a LORAWAN-based file transfer method according to another embodiment of the present invention;
fig. 5 is a flowchart illustrating a method for a LORAWAN gateway to send packets to a network server one by one according to another embodiment of the present invention;
fig. 6 is a flowchart illustrating a method for a LORAWAN gateway to send data packets to a network server batch by batch according to another embodiment of the present invention.
Detailed Description
In order to make the technical solutions of the present invention better understood by those skilled in the art, the present invention will be further described in detail with reference to the accompanying drawings and specific embodiments.
As shown in fig. 1, an embodiment of the present invention provides a file transmission method based on a LORAWAN, which is applied to a network server and a LORAWAN gateway, and is applied to the network server to upload a file to the LORAWAN gateway, and includes:
s11: the network server sends a file uploading request packet to a LORAWAN gateway;
s12: after receiving the file uploading request packet, the LORAWAN gateway responds to the file uploading request packet and transmits the file uploading request packet to the network server; the LORAWAN gateway creates a corresponding file for storing the data packet received from the network server;
s13: after receiving the file uploading request packet, the network server divides the file to be sent into a plurality of data packets which meet the uploading requirements of the LORAWAN gateway file;
s14: and the network server sends the data packets to the LORAWAN gateway one by one until the file to be sent is sent completely.
Specifically, in step S11, the file upload request packet includes the file name, the file size, and the file sub-packet size of the file to be transmitted.
Specifically, in step S12, the file upload request package includes the file size and the file sub-package size of the file that the LORAWAN gateway can accept.
As shown in fig. 2, in step S14, the method for the network server to send data packets to the LORAWAN gateway one by one until the file to be sent is sent, includes:
s141: the network server divides the data packets into a plurality of data packets according to a preset batch number;
s142: and the network server sends the data packets to the LORAWAN gateway batch by batch until the file to be sent is sent completely.
As shown in fig. 3, in step S142, the method for the network server to send data packets to the LORAWAN gateway batch by batch until the file to be sent is sent completely includes:
s1421: the network server continuously sends a batch of data packets to the LORAWAN gateway;
s1422: the network server sends the batch data packet loss query packet to a LORAWAN gateway;
s1423: the LORAWAN gateway checks whether the data packets in the batch of data packets are lost, if not, step S1425 is performed, and if yes, step S1424 is performed;
s1424: the LORAWAN gateway responds to the number of the missing data packets and the number of the missing data packets to the network server, and the network server retransmits the missing data packets in the data packets to the LORAWAN gateway, and then the step S1422 is performed;
s1425: the LORAWAN gateway responds to the network server that the data packets in the batch of data packets are not lost; the network server checks whether the file to be sent is sent completely, if not, the step S1426 is executed; if yes, go to step S1427;
s1426: the network server continuously sends the next batch of data packets to the LORAWAN gateway, and proceeds to step 1422;
s1427, the network server sends the packet loss query packet of the data packets with the packet number of 0 to the LORAWAN gateway, and the LORAWAN gateway responds that the data packets are not lost to the network server, and then the file to be sent is sent completely.
For example, when a web server uploads a file to a LORAWAN gateway, the code is defined as: cmd is a command keyword, dir is a transmission direction, fl is a file length, ps is a packet size, pn is a packet number, pc is a packet count, and pl is a packet number list.
TRANS _ FILE (cmd is 0, dir is 0, fl is 12345, ps is 1024, name is test.txt), the network server sends a FILE transmission request, the FILE name is test.txt, the FILE length is 12345 bytes, and the FILE packet size is 1024 bytes.
TRANS _ FILE _ ACK (cmd: Ox80, fl: 12345, ps: 1024), the LORAWAN gateway responds with acceptable FILE size and packetization size.
TRANS_FILE(cmd＝1，pn＝0，data…)，
TRANS_FILE(cmd＝1，pn＝1，data…)，
TRANS_FILE(cmd＝1，pn＝2，data…)，
TRANS _ FILE (cmd 1, pn 3, data …), the web server transmits the FILE data, and continuously transmits 4 packets by a preset number.
TRANS _ FILE (cmd is 2, pc is 4, pl is 0,1,2,3), the network server queries whether there is a packet drop.
TRANS _ FILE _ ACK (cmd — Ox83, pc — 1, pl — 2), the LORAWAN gateway acknowledges the number of packets and packet numbers that are not received.
TRANS _ FILE (cmd 1, pn 2, data …), the network server retransmits the lost packet.
TRANS _ FILE (cmd is 2, pc is 1, pl is 2), the network server re-inquires whether there is a packet drop.
TRANS _ FILE _ ACK (cmd ═ Ox83, pc ═ 0), the LORAWAN gateway responds with no dropped packets.
The TRANS _ FILE (cmd is 2, pc is 0) network server completes transmission, and notifies the LORAWAN gateway by transmitting a query packet with a packet number of 0.
TRANS _ FILE _ ACK (cmd ═ Ox83, pc ═ 0) LORAWAN gateway acknowledge receipt.
As shown in fig. 4, another embodiment of the present invention provides a method for transferring files based on LORAWAN, which is applied to a network server and a LORAWAN gateway, and is applied to the network server to download files from the LORAWAN gateway, including:
s21: the network server sends a file downloading request packet to a LORAWAN gateway;
s22: after receiving the file downloading request packet, the LORAWAN gateway responds to the file downloading confirmation packet and sends the file downloading confirmation packet to the network server; the LORAWAN gateway divides the file to be downloaded into a plurality of data packets;
s23: after the network server receives the file download confirmation packet, the network server creates a corresponding file for storing the data packet received from the LORAWAN gateway;
s24: and the LORAWAN gateway sends the data packets to the network server one by one until the file to be downloaded is sent completely.
Specifically, in step S21, the file download request packet includes the file name of the file to be downloaded.
Specifically, in step S22, the file download confirmation package includes the file name, the file size, and the file packetization size of the file to be downloaded.
As shown in fig. 5, in step S24, the method for the LORAWAN gateway to send packets to the network server one by one until the file to be downloaded is sent completely includes:
s241: dividing a plurality of data packets into a plurality of data packets by the LORAWAN gateway according to a preset batch number;
s242: and the LORAWAN gateway sends the data packets to the network server batch by batch until the file to be downloaded is sent.
As shown in fig. 6, in step S242, the method for the LORAWAN gateway to send data packets to the network server batch by batch until the file to be downloaded is sent completely includes:
s2421: the LORAWAN gateway continuously sends a batch of data packets to a network server;
s2422: the LORAWAN gateway sends the batch of data packet loss query packets to a network server;
s2423: the network server checks whether the data packets in the batch of data packets are lost, if not, the step S2425 is carried out, and if so, the step S2424 is carried out;
s2424: the network server responds to the number of the lost data packets and the number of the lost data packets to the LORAWAN gateway, the LORAWAN gateway retransmits the lost data packets in the data packets to the network server, and the step S2422 is executed;
s2425: the network server responds to the LORAWAN gateway that the data packets in the batch of data packets are not lost, the LORAWAN gateway checks whether the file to be downloaded is sent completely, and if not, the step S2426 is executed; if yes, go to step S2427;
s2426: the LORAWAN gateway continuously sends next batch of data packets to the network server, and the step S2422 is entered;
s2427: and the LORAWAN gateway sends the batch of data packet lost inquiry packets with the packet number of 0 to the LORAWAN gateway, the network server responds to the data packets which are not lost in the batch of data packets to the LORAWAN gateway, and the transmission of the file to be downloaded is finished.
A file transfer Protocol (file transfer method) set by the network server and the loran wan gateway includes a file request packet, a data packet, and a packet loss query based on UDP (User Datagram Protocol, abbreviated as User Datagram Protocol). The file transfer is bi-directional, and the network server can upload files to the LORAWAN gateway and also download files existing in the LORAWAN gateway. The transmission process is that the network server sends a file request packet to the LORAWAN gateway, the request packet contains information such as file name, file size, sub-packet size and the like, the LORAWAN gateway responds to the network server after receiving the information, and the LORAWAN gateway negotiates the file size and the sub-packet size which are acceptable by the LORAWAN gateway with the network server. And then the network server can send data packets in batches, then the packet loss inquiry packet is used for inquiring whether packet loss exists or not, if the packet loss exists, the packet loss is retransmitted, and the process is repeated until the file sending is finished. And if the file is uploaded, the LORAWAN gateway creates a corresponding file and stores the file after receiving the data. If the file is downloaded, the network server sends a file request, and the LORAWAN gateway sends a data packet and inquires packet loss. The file transmission method has better reliability, and simultaneously realizes the integrity of data and the high efficiency of transmission during data transmission.
The above is only a preferred embodiment of the present invention, and it should be noted that the above preferred embodiment should not be considered as limiting the present invention, and the protection scope of the present invention should be subject to the scope defined by the claims. It will be apparent to those skilled in the art that various modifications and adaptations can be made without departing from the spirit and scope of the invention, and these modifications and adaptations should be considered within the scope of the invention.
Claims (2)
1. A file transmission method based on LORAWAN is applied to a network server and a LORAWAN gateway, and is characterized by comprising the following steps:
s11: the network server sends a file uploading request packet to a LORAWAN gateway; the file uploading request packet comprises a file name, a file size and a file sub-packet size of a file to be sent;
s12: after receiving the file uploading request packet, the LORAWAN gateway responds to the file uploading request packet and transmits the file uploading request packet to a network server; the LORAWAN gateway creates a corresponding file for storing the data packet received from the network server; the file uploading requirement packet comprises the file size and the file sub-packet size of a file which can be accepted by the LORAWAN gateway;
s13: after receiving the file uploading request packet, the network server divides the file to be sent into a plurality of data packets which meet the uploading requirements of the LORAWAN gateway file;
s14: the network server sends data packets to the LORAWAN gateway one by one until the file to be sent is sent completely;
wherein, the method of S14 includes:
s141: the network server divides the data packets into a plurality of data packets according to a preset batch number;
s142: the network server sends data packets to the LORAWAN gateway batch by batch until the file to be sent is sent completely;
wherein the method of S142 comprises:
s1421: the network server continuously sends a batch of data packets to the LORAWAN gateway;
s1422: the network server sends the batch data packet loss query packet to a LORAWAN gateway;
s1423: the LORAWAN gateway checks whether the data packets in the batch of data packets are lost, if not, step S1425 is performed, and if yes, step S1424 is performed;
s1424: the LORAWAN gateway responds to the number of the missing data packets and the number of the missing data packets to the network server, and the network server retransmits the missing data packets in the data packets to the LORAWAN gateway, and then the step S1422 is performed;
s1425: the LORAWAN gateway responds to the network server that the data packets in the batch of data packets are not lost; the network server checks whether the file to be sent is sent completely, if not, the step S1426 is executed; if yes, go to step S1427;
s1426: the network server continuously sends the next batch of data packets to the LORAWAN gateway, and proceeds to step 1422;
s1427, the network server sends the packet loss query packet of the data packets with the packet number of 0 to the LORAWAN gateway, and the LORAWAN gateway responds that the data packets are not lost to the network server, and then the file to be sent is sent completely.
2. A file transmission method based on LORAWAN is applied to a network server and a LORAWAN gateway, and is characterized by comprising the following steps:
s21: the network server sends a file downloading request packet to a LORAWAN gateway; the file downloading request packet comprises a file name of a file to be downloaded;
s22: after receiving the file downloading request packet, the LORAWAN gateway responds to a file downloading confirmation packet to the network server; the LORAWAN gateway divides the file to be downloaded into a plurality of data packets; the file downloading confirmation package comprises a file name, a file size and a file sub-package size of a file to be downloaded;
s23: after the network server receives the file download confirmation packet, the network server creates a corresponding file for storing the data packet received from the LORAWAN gateway;
s24: the LORAWAN gateway sends data packets to a network server one by one until the file to be downloaded is sent;
wherein, the method of S24 includes:
s241: dividing a plurality of data packets into a plurality of data packets by the LORAWAN gateway according to a preset batch number;
s242: the LORAWAN gateway sends data packets to a network server batch by batch until the file to be downloaded is sent;
wherein the method of S242 includes:
s2421: the LORAWAN gateway continuously sends a batch of data packets to a network server;
s2422: the LORAWAN gateway sends the batch of data packet loss query packets to a network server;
s2423: the network server checks whether the data packets in the batch of data packets are lost, if not, the step S2425 is carried out, and if so, the step S2424 is carried out;
s2424: the network server responds to the number of the lost data packets and the number of the lost data packets to the LORAWAN gateway, the LORAWAN gateway retransmits the lost data packets in the data packets to the network server, and the step S2422 is executed;
s2425: the network server responds to the LORAWAN gateway that the data packets in the batch of data packets are not lost, the LORAWAN gateway checks whether the file to be downloaded is sent completely, and if not, the step S2426 is executed; if yes, go to step S2427;
s2426: the LORAWAN gateway continuously sends next batch of data packets to the network server, and the step S2422 is entered;
s2427: and the LORAWAN gateway sends the batch of data packet lost inquiry packets with the packet number of 0 to the LORAWAN gateway, the network server responds to the data packets which are not lost in the batch of data packets to the LORAWAN gateway, and the transmission of the file to be downloaded is finished.
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| CN109067892A (en) * | 2018-08-22 | 2018-12-21 | 苏州凌犀物联网技术有限公司 | Big data transmission method, terminal and server in a kind of Lora communication system |
| CN109327525A (en) * | 2018-10-26 | 2019-02-12 | 浙江理工大学 | It is a kind of for being knitted the document transmission method and device of interconnection plane |
| CN111757273B (en) * | 2019-03-29 | 2022-04-12 | 阿里巴巴集团控股有限公司 | Multicast communication method, system, multicast application server and terminal of communication network |
| CN110198349B (en) * | 2019-05-27 | 2022-11-22 | 腾讯科技（深圳）有限公司 | File transmission method and device, storage medium and electronic device |
| CN110492978B (en) * | 2019-08-13 | 2020-04-24 | 翱捷科技(深圳)有限公司 | LoRaWAN system capable of achieving rapid confirmation and implementation method thereof |
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