CN111835465B - Lora network communication method, lora node and Lora network communication system - Google Patents
Lora network communication method, lora node and Lora network communication system Download PDFInfo
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- CN111835465B CN111835465B CN201910682116.0A CN201910682116A CN111835465B CN 111835465 B CN111835465 B CN 111835465B CN 201910682116 A CN201910682116 A CN 201910682116A CN 111835465 B CN111835465 B CN 111835465B
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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
- H04L1/004—Arrangements for detecting or preventing errors in the information received by using forward error control
- H04L1/0056—Systems characterized by the type of code used
- H04L1/0061—Error detection codes
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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
- H04L1/1607—Details of the supervisory signal
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
- H04W4/30—Services specially adapted for particular environments, situations or purposes
- H04W4/38—Services specially adapted for particular environments, situations or purposes for collecting sensor information
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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 provides a Lora network communication method, a Lora node and a Lora network communication system, wherein the method comprises the following steps: after uploading node data containing the actual load data acquired this time to a Lora gateway in a time window, judging whether the node data is uploaded successfully, and if the node data is uploaded unsuccessfully, storing the node data which is uploaded unsuccessfully; and uploading the stored node data and the node data containing the actual load data collected next time to the Lora gateway at the next time window by the Lora node. The invention can avoid the data loss caused by short-term network quality difference and ensure the integrity of the transmitted data.
Description
Technical Field
The invention belongs to the technical field of communication, and particularly relates to a Lora network communication method, a Lora node and a Lora network communication system.
Background
A single-channel star Radio (Long Range Radio) network is a network composed of a Lora gateway and a plurality of Lora nodes, and the communication parameters of the Lora nodes and the Lora gateway are the same, so that the Lora nodes and the Lora gateway can communicate with each other, but can interfere with each other. Therefore, a time-division multiplexing method is generally adopted to allocate a time window for each node to communicate with the gateway, and only one node is active in each time window. The nodes need to periodically collect the data of the sensors and upload the data in their own time windows. Due to the external environment interference, the communication between the node and the gateway may be unsuccessful or wrong, and the acquired data cannot be transmitted to the gateway, thereby causing data loss.
Disclosure of Invention
The invention provides a Lora network communication method, a Lora node and a Lora network communication system, which can avoid the data loss caused by short-term network quality difference and ensure the integrity of transmitted data.
The invention provides a Lora network communication method, which comprises the following steps:
after uploading node data containing the actual load data acquired this time to a Lora gateway in a time window, judging whether the node data is uploaded successfully, and if the node data is uploaded unsuccessfully, storing the node data which is uploaded unsuccessfully;
and uploading the stored node data and the node data containing the actual load data collected next time to the Lora gateway at the next time window by the Lora node.
Preferably, the Lora node determines whether the node data is uploaded successfully, and specifically includes the following steps:
and uploading node data to the Lora gateway by the Lora node in the corresponding time window, and repeatedly uploading the node data to the Lora gateway when a successful response of data uploading returned by the Lora gateway is not received after a set time length, and judging that the node data is successfully uploaded if the Lora node receives a successful response of data uploading returned by the Lora node in the corresponding time window.
Preferably, the method further comprises the following steps:
after the data are acquired by the Lora node every time, distributing a message number to the actual load data acquired this time; and the node data of the Lora node further comprises a message number corresponding to the actual load data acquired this time.
Preferably, the method further comprises the following steps:
and deleting the stored node data after the Lora node judges that the stored node data is uploaded successfully.
Preferably, the method further comprises the following steps:
and the Lora gateway receives the node data uploaded by the Lora node, judges whether the node data are repeatedly uploaded or not, and stores the node data which are not repeatedly uploaded.
Preferably, the method further comprises the following steps:
and after the node data sent by the Lora node is received, the Lora gateway checks the node data, and after the correction is passed, the Lora gateway sends a data uploading success response to the Lora node.
The present invention also provides a Lora node, which includes:
the data uploading state judging module is used for judging whether the node data are uploaded successfully after the node data containing the acquired actual load data are uploaded to the Lora gateway in a time window, and if the node data are uploaded unsuccessfully, the node data which are uploaded unsuccessfully are stored;
and the node data uploading module is used for uploading the stored node data and the node data containing the actual load data acquired next time to the Lora gateway at the next time window.
The invention also provides a Lora network communication system, which comprises the Lora nodes and the Lora gateway, wherein the Lora nodes comprise:
the data uploading state judging module is used for judging whether the node data are uploaded successfully after the node data containing the acquired actual load data are uploaded to the Lora gateway in a time window, and if the node data are uploaded unsuccessfully, the node data which are uploaded unsuccessfully are stored;
and the node data uploading module is used for uploading the stored node data and the node data containing the actual load data acquired next time to the Lora gateway at the next time window.
Preferably, the data uploading state determining module is further configured to upload node data to the Lora gateway in the corresponding time window, and repeatedly upload the node data to the Lora gateway when a data uploading success response returned by the Lora gateway is not received for a set duration, until a data uploading success response returned by the Lora node is received in the time window corresponding to the Lora node, determine that the node data is uploaded successfully.
Preferably, the Lora gateway includes:
and the data screening and storing module is used for receiving the node data uploaded by the Lora node, judging whether the node data uploaded repeatedly exists or not, and storing the node data not uploaded repeatedly.
According to the Lora network communication method, the Lora node and the Lora network communication system, in a time window, after the node fails to upload the node data, the node data which is unsuccessfully uploaded is stored, in the next time window, the stored node data is taken out and uploaded to the Lora gateway together with the latest node data, iteration can be repeated for multiple times until the Lora node judges that the data is successfully uploaded, the integrity of the uploaded data is ensured, and the situation of data loss caused by short-term network quality difference can be avoided.
Drawings
FIG. 1 is a flow chart of a Lora network communication method provided by the present invention;
FIG. 2 is a schematic diagram of a communication process between a Lora node and a Lora gateway provided in the present invention;
fig. 3 is a schematic diagram of the format of node data provided by the present invention.
Detailed Description
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention and do not limit the application scope of the present invention, and it is obvious for a person skilled in the art to apply the present invention to other similar scenes according to the drawings without creative efforts.
The invention provides a Lora network communication method, as shown in figure 1, comprising the following steps:
after uploading node data containing the actual load data acquired this time to a Lora gateway in a time window, judging whether the node data is uploaded successfully, and if the node data is uploaded unsuccessfully, storing the node data which is uploaded unsuccessfully; generally, the node data which fails to be uploaded can be stored in a Flash memory;
and uploading the stored node data and the node data containing the actual load data collected next time to the Lora gateway at the next time window by the Lora node.
The method for judging whether the node data is uploaded successfully by the Lora node comprises the following steps:
and uploading the node data to the Lora gateway by the Lora node in the corresponding time window, and repeatedly uploading the node data to the Lora gateway when the successful response of uploading the data returned by the Lora gateway is not received for a set time length until the Lora node receives the successful response of uploading the data returned by the Lora node in the corresponding time window, and then judging that the uploading of the node data is successful.
As shown in fig. 2, when communication is performed between the Lora node and the Lora gateway, a response returned by the Lora gateway may be received after data is transmitted by the Lora node.
The Lora network communication method further comprises the following steps:
after the data are collected by the Lora node every time, distributing a message number to the actual load data collected this time, wherein the node data of the Lora node also comprises the message number corresponding to the actual load data collected this time.
Specifically, as shown in fig. 3, the node Data at least includes a node number nodeid, a message number MsgID, actual load Data, and a Check code CRC (Cyclic Redundancy Check code), where the Check code CRC can be calculated according to a field of the message number, and the node Data is framed and then uploaded to the Lora gateway.
The Lora network communication method further comprises the following steps:
and when the Lora node judges that the stored node data is uploaded successfully, deleting the stored node data.
The Lora network communication method further comprises the following steps:
and the Lora gateway receives the node data uploaded by the Lora node, judges whether the uploaded node data contains the repeatedly uploaded node data or not, stores the node data which is not repeatedly uploaded, and directly ignores the repeatedly uploaded node data.
The Lora network communication method further comprises the following steps:
and after receiving the node data sent by the Lora node, the Lora gateway checks the node data, and after the correction is passed, sends a data uploading success response to the Lora node.
Specifically, the Lora gateway may perform CRC check on the node data, and after the CRC check is passed, the Lora node is issued with a data upload success response, and when the Lora node receives the response issued by the Lora gateway, it is considered that this communication is successful, and the message number in the node system is increased by 1 again for being allocated to actual load data acquired next time.
The method includes that a Lora node does not receive a successful response of data uploading issued by a Lora gateway, the Lora gateway possibly receives data successfully, but fails to issue the response, the Lora node uploads the node data again until a next time window, the Lora gateway receives the node data uploaded again, judges that a message number in the node data is the same as a message number in the node data uploaded before, judges that the node data is uploaded successfully before, and ignores the data if the node data is considered to be repeated data, and replies the node with a successful response of data uploading.
If the node fails to upload the data, the message number corresponding to the node data is not changed when the node uploads the node data again. And in a time window, the node uploads the data to the gateway again for many times, if the communication time window is exhausted and a response cannot be received, the last data is considered to be failed, the actual load data and the corresponding message number are stored in a system Flash of the node, and 1 is added to the current message number to serve as the message number of the actual load data collected next time.
And in the next time window, the node uploads the newly acquired actual load data and the corresponding message number thereof, and the actual load data and the message number in the storage to the gateway together.
After receiving the node data, the gateway compares the message numbers in the node data uploaded to the gateway by the node last time with the message numbers in the node data of the current time, and judges the freshness of the data according to the message numbers. The node data corresponding to the message number received by the gateway, which is greater than the last message number, is new data, and the rest of the node data are old data and are directly ignored.
And in the time window, when the node fails to upload the node data containing the actual load data acquired at this time, if the node data fails to be uploaded continuously in the next time window, the node data is continuously uploaded continuously in the next time window, and the steps are repeated until the acquired actual load data are uploaded to the gateway.
The present invention also provides a Lora node, which includes: the device comprises a data uploading state judging module and a node data uploading module.
The data uploading state judging module is used for judging whether the node data are uploaded successfully after the node data containing the actual load data acquired at this time are uploaded to the Lora gateway in a time window, and storing the node data which are uploaded unsuccessfully if the node data are uploaded unsuccessfully.
And the node data uploading module is used for uploading the stored node data and the node data containing the actual load data acquired next time to the Lora gateway at the next time window.
The invention also provides a Lora network communication system, which comprises a Lora node and a Lora gateway, wherein the Lora node comprises: the device comprises a data uploading state judging module and a node data uploading module.
The data uploading state judging module is used for judging whether the node data are uploaded successfully after the node data containing the actual load data acquired at this time are uploaded to the Lora gateway in a time window, and storing the node data which are uploaded unsuccessfully if the node data are uploaded unsuccessfully.
And the node data uploading module is used for uploading the stored node data and the node data containing the actual load data acquired next time to the Lora gateway at the next time window.
The data uploading state judgment module is further used for uploading the node data to the Lora gateway in the corresponding time window, and repeatedly uploading the node data to the Lora gateway when the data uploading successful response returned by the Lora gateway is not received in the set time duration, and judging that the node data are successfully uploaded if the data uploading successful response returned by the Lora node is received in the time window corresponding to the Lora node.
The Lora node further comprises a framing module, the framing module is used for distributing a message number to the actual load data collected at this time after the data are collected at the Lora node every time, and the node data of the Lora node comprises the message number corresponding to the actual load data collected at this time.
The data uploading state judging module is also used for deleting the stored node data after the stored node data are uploaded successfully.
The Lora gateway includes: and a data screening and storing module.
The data screening and storing module is used for receiving the node data uploaded by the Lora node, judging whether the node data has repeatedly uploaded node data or not, and storing the node data which is not repeatedly uploaded.
The Lora gateway also comprises a node data verification module, wherein the node data verification module is used for verifying the node data after receiving the node data sent by the Lora node, and sending a data uploading success response to the Lora node after the node data is corrected.
The invention introduces the message numbering mode, adopts the message numbering mode when the actual load data is collected in a communication time window, and avoids the problem of data repetition caused by node retransmission data due to the failure of gateway response sending through the unique and self-increasing mode of the message numbering. After the node fails to retransmit the data, the data is not discarded, but stored in a Flash memory, and is uploaded together until the next time window, and the iteration can be repeated for multiple times until the data is uploaded successfully, so that the integrity of the data is ensured, and the condition of data loss caused by short-term poor network quality can be avoided.
The above description is intended to be illustrative of the preferred embodiment of the present invention and should not be taken as limiting the invention, but rather, the intention is to cover all modifications, equivalents, and alternatives falling within the spirit and scope of the invention.
Claims (7)
1. A Lora network communication method is characterized by comprising the following steps:
after the data are acquired by the Lora node every time, distributing a message number to the actual load data acquired this time;
the method comprises the steps that after a Lora node uploads node data containing actual load data collected this time to a Lora gateway in a time window, whether the node data are uploaded successfully is judged, if the node data are uploaded unsuccessfully in the time window, the actual load data and a corresponding message number are stored in a system Flash of the node, 1 is added to the current message number to serve as the message number of the actual load data collected next time, and the node data at least comprise the node number, the message number, the actual load data and a check code;
the method comprises the steps that the Lora node uploads stored node data and node data containing actual load data collected next time to the Lora gateway in the next time window, the Lora gateway conducts CRC on the node data after receiving the node data sent by the Lora node, and when the CRC passes, a data uploading success response is sent to the Lora node; when the Lora node receives a response issued by the Lora gateway, determining that the uploading of data is successful, and increasing the message number by 1 for distributing the message number to the actual load data collected next time;
and the Lora gateway receives the node data uploaded by the Lora node, judges whether the node data are repeatedly uploaded or not, and stores the node data which are not repeatedly uploaded.
2. The Lora network communication method according to claim 1, wherein the Lora node determines whether the node data is uploaded successfully, and specifically includes the following steps:
and uploading node data to the Lora gateway by the Lora node in the corresponding time window, and repeatedly uploading the node data to the Lora gateway when the successful response of uploading the data returned by the Lora gateway is not received within a set time length until the Lora node receives the successful response of uploading the data returned by the Lora node in the corresponding time window, and then judging that the uploading of the node data is successful.
3. The Lora network communication method according to claim 1, further comprising the steps of:
and deleting the stored node data after the Lora node judges that the stored node data is uploaded successfully.
4. A Lora node, comprising:
the data uploading state judging module is used for distributing a message number to the actual load data acquired at this time after the data are acquired each time; after node data containing the actual load data collected this time is uploaded to a Lora gateway in a time window, whether the node data are uploaded successfully is judged, if the node data are not uploaded in the time window, the actual load data and a corresponding message number are stored in a system Flash of the node, 1 is added to the current message number to serve as the message number of the actual load data collected next time, and the node data at least comprise the node number, the message number, the actual load data and a check code;
the node data uploading module is used for uploading the stored node data and the node data containing the actual load data acquired next time to the Lora gateway at the next time window, the Lora gateway is used for performing CRC (cyclic redundancy check) on the node data after receiving the node data sent by the Lora node, and when the CRC passes, the Lora node is issued with a data uploading success response; the Lora gateway receives the node data uploaded by the Lora node, judges whether the node data are repeatedly uploaded or not, and stores the node data which are not repeatedly uploaded;
the node data uploading module is further configured to: and when the Lora node receives a response issued by the Lora gateway, determining that the uploading of the data is successful, and increasing the message number by 1 for distributing the message number to the actual load data acquired next time.
5. A Lora network communication system, comprising the Lora node and the Lora gateway of claim 4.
6. The Lora network communication system according to claim 5, wherein the data upload state determining module is further configured to upload node data to the Lora gateway in the corresponding time window, and when a successful data upload response returned by the Lora gateway is not received after a set duration, repeatedly upload the node data to the Lora gateway until a successful data upload response returned by the Lora node is received in the time window corresponding to the Lora node, and then determine that the node data upload is successful.
7. The Lora network communication system according to claim 5, wherein the Lora gateway comprises:
and the data screening and storing module is used for receiving the node data uploaded by the Lora node, judging whether the node data uploaded repeatedly exists or not, and storing the node data not uploaded repeatedly.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910317806.6A CN110071786A (en) | 2019-04-19 | 2019-04-19 | A method of improving LoRa communication integrity |
| CN2019103178066 | 2019-04-19 |
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| CN111835465A CN111835465A (en) | 2020-10-27 |
| CN111835465B true CN111835465B (en) | 2023-03-24 |
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| CN201910682116.0A Active CN111835465B (en) | 2019-04-19 | 2019-07-26 | Lora network communication method, lora node and Lora network communication system |
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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 |
| CN113472486A (en) * | 2021-06-30 | 2021-10-01 | 四川省分析测试服务中心 | Efficient retransmission method and device for low-frequency acquisition of instrument operation data |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106209613A (en) * | 2016-08-31 | 2016-12-07 | 上海宏力达信息技术股份有限公司 | A kind of gateway based on LoRa wireless technology |
| CN107517261A (en) * | 2017-08-31 | 2017-12-26 | 深圳市中兴物联科技有限公司 | Gateway, server, method, apparatus, storage medium and Internet of things system |
| CN107528926A (en) * | 2017-10-11 | 2017-12-29 | 郑州云海信息技术有限公司 | A kind of file uploading method and system |
| CN108989455A (en) * | 2018-08-13 | 2018-12-11 | 中国科学院声学研究所南海研究站 | A kind of data based on LoRa Internet of Things report and instruct delivery method |
| CN109587006A (en) * | 2018-12-27 | 2019-04-05 | 深圳云博智联科技有限公司 | A kind of data forward method and its system and storage medium based on Lora gateway |
-
2019
- 2019-04-19 CN CN201910317806.6A patent/CN110071786A/en not_active Withdrawn
- 2019-07-26 CN CN201910682116.0A patent/CN111835465B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106209613A (en) * | 2016-08-31 | 2016-12-07 | 上海宏力达信息技术股份有限公司 | A kind of gateway based on LoRa wireless technology |
| CN107517261A (en) * | 2017-08-31 | 2017-12-26 | 深圳市中兴物联科技有限公司 | Gateway, server, method, apparatus, storage medium and Internet of things system |
| CN107528926A (en) * | 2017-10-11 | 2017-12-29 | 郑州云海信息技术有限公司 | A kind of file uploading method and system |
| CN108989455A (en) * | 2018-08-13 | 2018-12-11 | 中国科学院声学研究所南海研究站 | A kind of data based on LoRa Internet of Things report and instruct delivery method |
| CN109587006A (en) * | 2018-12-27 | 2019-04-05 | 深圳云博智联科技有限公司 | A kind of data forward method and its system and storage medium based on Lora gateway |
Non-Patent Citations (3)
| Title |
|---|
| 基于LoRa的农业大棚无线温湿度监测系统设计与实现;杨祯等;《电子测量技术》;20180608(第11期);正文第1-3节 * |
| 基于马尔科夫链的LoRaWAN网络节点性能分析;何通能等;《传感技术学报》;20180915(第09期);全文 * |
| 杨祯等.基于LoRa的农业大棚无线温湿度监测系统设计与实现.《电子测量技术》.2018,(第11期), * |
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| CN111835465A (en) | 2020-10-27 |
| CN110071786A (en) | 2019-07-30 |
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