CN108173685A - Upgrade method, system and corresponding terminal device and server based on LoRa communications - Google Patents
Upgrade method, system and corresponding terminal device and server based on LoRa communications Download PDFInfo
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- CN108173685A CN108173685A CN201711430959.9A CN201711430959A CN108173685A CN 108173685 A CN108173685 A CN 108173685A CN 201711430959 A CN201711430959 A CN 201711430959A CN 108173685 A CN108173685 A CN 108173685A
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- terminal device
- upgrade
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- spreading factor
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L41/00—Arrangements for maintenance, administration or management of data switching networks, e.g. of packet switching networks
- H04L41/08—Configuration management of networks or network elements
- H04L41/0803—Configuration setting
- H04L41/0813—Configuration setting characterised by the conditions triggering a change of settings
- H04L41/082—Configuration setting characterised by the conditions triggering a change of settings the condition being updates or upgrades of network functionality
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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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- 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
Abstract
The present invention is intended to provide upgrade method, system and corresponding terminal device and server based on LoRa communications, do not have upgrade function with the terminal device communicated based on LoRa solved the problems, such as in prior art.Upgrade method includes：Terminal device is grouped；Upgrade task in response to firmware code, server sends that each group terminal device is notified to open the upgrade notification instruction of reception window in preset time with default spreading factor and broadcasts upgrade package in preset time with default spreading factor to each group terminal device to each group terminal device；Terminal device is instructed in response to the upgrade notification that server is sent, according to the upgrade package of the upgrade notification command reception server broadcast.Corresponding, the invention also includes corresponding upgrade-system and corresponding terminal devices and server.It realizes the terminal device firmware code upgrading communicated based on LoRa, and is grouped based on terminal device and with spreading factor SF upgrade, improve upgrading efficiency.
Description
Technical field
The present invention relates to the communications fields, and in particular to upgrade method, system and corresponding terminal based on LoRa communications are set
Standby and server.
Background technology
Internet of things networking project plan comparison currently based on LoRa communications is ripe, be widely used in smart city, wisdom environment,
In the fields such as wisdom agricultural, but do not have code upgrade function using the terminal of LoRa communications, once product goes wrong, then need
It in high volume to recall, cost is huge.
Internet of things networking scheme based on LoRa communications does not have client code upgrade function, and flexibility is poor, and risk is higher；
Once product goes wrong, then high-volume is needed to recall, cost is huge.Although the internet of things networking scheme based on GPRS technologies can
To carry out terminal device code upgrade, but its power consumption is big, of high cost, every time can only be to single terminal end device upgrade, and Internet of Things
Equipment often enormous amount, therefore cause that upgrading efficiency is low, and server load pressure is big.
The existing client code upgrade method based on GPRS be point-to-point upgrading, and based on LoRa communication traffic rate compared with
Low, rate only has 1/10th of GPRS under SF7 transmission, and using point-to-point upgrading, time-consuming, it is difficult to bear, can not play
LoRa technologies have the characteristics of broadcast transmission.
Invention content
The present invention is intended to provide upgrade method, system and corresponding terminal device and server based on LoRa communications, with
Solve the problems, such as that the terminal device communicated based on LoRa in prior art does not have upgrade function.
In order to realize the purpose, the present invention is based on the upgrade method of LoRa communications, for the firmware of upgrading terminals equipment
Code, including：
Terminal device is grouped；
Upgrade task in response to firmware code, server sends that each group terminal device is notified to exist to each group terminal device
Preset time with preset spreading factor open reception window upgrade notification instruction and to each group terminal device preset time with
Default spreading factor broadcast upgrade package, wherein, the preset time of each group terminal device and default spreading factor differ；
Terminal device is instructed in response to the upgrade notification that server is sent, according to the upgrade notification command reception server
The upgrade package of broadcast is upgrading.
Preferably, it is described to include terminal device grouping:Server is grouped according to the signal strength of each terminal device；
The default spreading factor numerical value of the strong terminal device group of signal is less than the default spreading factor of the weak terminal device group of signal.
Preferably, server issues time data with the uplink time section of prescribed terminal equipment, and terminal device receives service
The time data that device issues reports the period to send business datum and is receiving the upgrade notification instruction of server transmission.
Preferably, it is described to include terminal device grouping:Terminal device is divided into two groups by server；One group of terminal device
Default spreading factor is set to SF9, and the preset time of this group of terminal device instructs the next of place uplink time section for upgrade notification
First period of uplink time section；The default spreading factor of another group of terminal device is set to SF12, this group of terminal device
Second period of next uplink time section of uplink time section where preset time is instructed for upgrade notification；It is described to each group
Terminal device is broadcasted upgrade package with default spreading factor in preset time and is included：It is broadcasted and risen with SF9 in first period
Grade packet broadcasts upgrade package in second period with SF12.
Preferably, it is described to be included to each group terminal device in preset time with default spreading factor broadcast upgrade package：It will rise
Grade packet splits into several data packets, and broadcast the data packet, wherein, each data packet includes sequence number and total packet number；Eventually
End equipment third period detection of next uplink time section of uplink time section where upgrade notification instruction judges upgrading
Whether bag data has missing, if there is missing, in the data packet that the third period lacks to server request.
Preferably, first period is first 1/3 period of next uplink time section；Described second
A period is second 1/3 period of next uplink time section；The third period is next upload
1/3 period of third of period.
Preferably, the terminal device sends business datum in a random time for reporting the period；And/or
The data packet that a random time of the terminal device in the third period is lacked to server request.
Another aspect of the present invention, based on the upgrade-system of LoRa communications, for the firmware code of upgrading terminals equipment, packet
Include server and terminal device；
The server is configured as：Terminal device is grouped；Upgrade task in response to firmware code, set to each group terminal
Preparation is sent for notifying each group terminal device in preset time to preset the upgrade notification instruction that spreading factor opens reception window, with
And upgrade package is broadcasted with default spreading factor in preset time to each group terminal device, wherein, each group terminal device it is default when
Between and default spreading factor differ；
The terminal device is configured as：It is instructed in response to the upgrade notification that server is sent, according to the upgrade notification
The upgrade package of command reception server broadcast is upgrading.
Another aspect of the present invention, a kind of terminal device, the terminal device are configured as：It is sent in response to server
For notifying each group terminal device in preset time to preset the upgrade notification instruction that spreading factor opens reception window, according to described
Upgrade notification instruction opens reception window to receive the upgrading of server broadcast in corresponding preset time with corresponding setting factor beforehand
Packet.
Another aspect of the present invention, a kind of server, the server are configured as：Terminal device is grouped；In response to
Firmware code upgrades task, sent to each group terminal device for notify each group terminal device preset time with default spread spectrum because
Son opens the upgrade notification instruction of reception window and broadcasts upgrading in preset time with default spreading factor to each group terminal device
Packet, wherein, the preset time of each group terminal device and default spreading factor differ.
Following advantageous effects can be obtained by implementing the present invention：
1. realizing the terminal device firmware code upgrading communicated based on LoRa, and it is grouped based on terminal device with different expansions
Frequency factor S F is upgraded, and improves upgrading efficiency.
2. server is grouped according to the signal strength of each terminal device, hour transmission speed is got over for spreading factor value
The characteristics of faster and transmission range is shorter, the strong terminal device group of signal preset that spreading factor value is small, and the weak terminal of signal is set
The standby default spreading factor value of group is big；And then it can quickly receive upgrade package apart near terminal device；And apart from remote end
End equipment can still receive upgrade package, and then improve the efficiency of transmission of upgrade package.
3. terminal device reports the period to send business datum and is receiving the upgrade notification instruction of server transmission, should
The advantages of it is the periodic period to report the period, the periodic period be, can be between server and terminal device
Unified setting, can such as set：When server-side sends upgrade notification instruction in this period, upgraded in subsequent time period；
And which time interval for being set in next period carries out upgrade package reception by which group device end；Further may be used also
Upgrade package is carried out with what spreading factor value by which group device end with which time interval for setting next period
It receives.Such setting so that upgrade notification instruction may know that when device end is receiving upgrading without complicated data
Packet carries out upgrade package reception with what spreading factor value.
4. the terminal device sends business datum, and then reduce terminal in a random time for reporting the period
Equipment sends the probability of business datum simultaneously, reduces server stress or reduces the complexity that data upload setting.
It, can be in order to transmitting 5. by the way that upgrade package is split as several data packets；In the third period, request lacks simultaneously
The data packet of mistake ensures the integrality of data packet.
Description of the drawings
Fig. 1 is the flow chart of the upgrade method based on LoRa communications in embodiment 1；
Fig. 2 is the connection figure of the upgrade-system based on LoRa communications in embodiment 2.
Specific embodiment
For the ease of the understanding of those skilled in the art, the present invention is made further with reference to specific embodiment
It is bright：
Embodiment 1：
The present invention provides the upgrade method communicated based on LoRa, for the firmware code of upgrading terminals equipment, such as Fig. 1 institutes
Show, including：
Step S1：Terminal device is grouped；
Step S2：Upgrade task in response to firmware code, server sends to notify that each group is whole to each group terminal device
End equipment opens the upgrade notification instruction of reception window and to each group terminal device pre- in preset time to preset spreading factor
If the time broadcasts upgrade package with default spreading factor, wherein, the preset time of each group terminal device and default spreading factor not phase
Together；
Step S3：Terminal device is instructed in response to the upgrade notification that server is sent, and is connect according to upgrade notification instruction
The upgrade package of server broadcast is received to upgrade.
The present embodiment efficiently uses the spreading factor SF of LoRa (Long Range) communications, by dividing terminal device
Group so that difference group terminal devices when receiving upgrade package using different spreading factors, when the firmware code of terminal device
When needing upgrading, server notifies each group terminal device to open reception window in preset time with setting factor beforehand；And with each group terminal
The preset time and setting factor beforehand of equipment opening reception window are corresponding, and server is in the corresponding time with corresponding default
The factor broadcasts upgrade package；Terminal device is allowd to receive the upgrade package of service area broadcast, and is upgraded according to upgrade package, is realized
Terminal device firmware code upgrading based on LoRa communications；And it is grouped based on terminal device and is risen with different spreading factor SF
Grade improves upgrading efficiency.Due to different spreading factor SF, spread speed, propagation distance and power consumption differ, using this reality
The method for applying example can be grouped according to the characteristics of different spreading factors according to actual demand, finally meet the practical need
It asks.
It is known that, LoRaWAN communications protocol can be used in LoRa communications.
In one embodiment, the upgrade package according to the upgrade notification command reception server broadcast is rising
Grade includes：Preset time that terminal device refers in upgrade notification instruction opens reception window with default spreading factor, to receive
Server broadcast upgrade package.
In one embodiment, it is described to include terminal device grouping:Server is strong according to the signal of each terminal device
It is weak to be grouped；The default spreading factor numerical value of the strong terminal device group of signal is less than the default expansion of the weak terminal device group of signal
The frequency factor.Server is grouped according to the signal strength of each terminal device, for spreading factor value more hour transmission speed more
The characteristics of fast and transmission range is shorter, the strong terminal device group of signal preset that spreading factor value is small, the weak terminal device of signal
The default spreading factor value of group is big；And then it can quickly receive upgrade package apart near terminal device；And apart from remote terminal
Equipment can still receive upgrade package, and then improve the efficiency of transmission of upgrade package.It is known that, server is according to each terminal
It is that the signal strength carried out in the same spread factor values that terminal device uses is sentenced when the signal strength of equipment is grouped
It is disconnected.
In one embodiment, server issues time data with the uplink time section of prescribed terminal equipment, and terminal is set
It is standby to receive time data that server issues and lead to the period is reported to send business datum and receive the upgrading of server transmission
Know instruction.Terminal device reports the period to send business datum and is receiving the upgrade notification instruction of server transmission, on this
The advantages of section that calls time is the periodic period, the periodic period is, can unite between server and terminal device
One setting, can such as set：When server-side sends upgrade notification instruction in this period, upgraded in subsequent time period；And
Which time interval for being set in next period carries out upgrade package reception by which group device end；It further can be with
Which time interval for setting next period is connect by which group device end carries out upgrade package with what spreading factor value
It receives.Such setting so that upgrade notification instruction may know that without complicated data device end when receive upgrade package,
What spreading factor value upgrade package reception is carried out with.As preferably embodiment, device end update time section no longer on
Pass data.
As the embodiment of the above-mentioned upgrade method based on LoRa communications, the terminal device reports the period described
A random time send business datum, and then reduce terminal device and send the probability of business datum simultaneously, reduce server
Pressure.
It is described to include terminal device grouping as the embodiment of the above-mentioned upgrade method based on LoRa communications:Service
Terminal device is divided into two groups by device；The default spreading factor of one group of terminal device is set to SF9, the preset time of this group of terminal device
First period of next uplink time section of uplink time section where being instructed for upgrade notification；Another group of terminal device it is pre-
If spreading factor is set to SF12, uplink time section where the preset time of this group of terminal device is instructed for upgrade notification it is next on
Pass second period of period；It is described that upgrade package packet is broadcasted with default spreading factor in preset time to each group terminal device
It includes：Upgrade package is broadcasted with SF9 in first period, upgrade package is broadcasted with SF12 in second period.Spread spectrum
When factor values are 9, when terminal device is with server communication, has speed；When spreading factor value is 12, has distance；It is logical
It crosses in different time sections respectively with SF9 and SF12 transmission upgrade package, that is, has taken into account distance and taken into account speed.It is known that,
That group of device end that default spreading factor is set to SF9 is the relatively good device end of signal of communication；Default spreading factor is put
That group of device end for SF12 is the relatively poor device end of signal of communication.In the present embodiment, due to update time to send out
Based on sending the time that upgrade notification instructs, therefore very simple signal may be used in upgrade notification instruction, and then simplifies upgrading
The complexity of notification instruction.
As it is above-mentioned based on LoRa communication upgrade method embodiment, it is described to each group terminal device in preset time
Upgrade package is broadcasted with default spreading factor to include：Upgrade package is split into several data packets, and broadcasts the data packet, wherein,
Each data packet includes sequence number and total packet number；Next upload of terminal device uplink time section where upgrade notification instruction
The third period detection of period judges to upgrade whether bag data has missing, if there is missing, in the third time
The data packet that section is lacked to server request.It, can be in order to transmitting by the way that upgrade package is split as several data packets；Simultaneously the
The data packet of three period request missings ensures the integrality of data packet.
In one embodiment, first period is first 1/3 time of next uplink time section
Section；Second period is second 1/3 period of next uplink time section；The third period is institute
State 1/3 period of third of next uplink time section.
In one embodiment, the terminal device in the random time of the third period to server
Ask the data packet of missing.It can prevent terminal device from being clashed in the data packet of request missing.It is known that,
The third period missing data packet amount it is less, at this time to the requirement of speed should not, can unify to communicate with SF12.
In one embodiment, server issues time data with synchronizer terminal time.
Embodiment 2：
As described in Figure 2, the upgrade-system based on LoRa communications, for the firmware code of upgrading terminals equipment, including service
Device 1 and terminal device 2；
The server 1 is configured as：Terminal device is grouped；Upgrade task in response to firmware code, to each group terminal
Equipment is sent for notifying each group terminal device in preset time to preset the upgrade notification instruction that spreading factor opens reception window,
And upgrade package is broadcasted with default spreading factor in preset time to each group terminal device, wherein, each group terminal device is preset
Time and default spreading factor differ；
The terminal device 2 is configured as：It is instructed in response to the upgrade notification that server is sent, according to the upgrade notification
The upgrade package of command reception server broadcast is upgrading.
In one embodiment, server is configured as：It is grouped according to the signal strength of each terminal device；Signal is strong
The default spreading factor numerical value of terminal device group be less than the default spreading factor of the weak terminal device group of signal.
In one embodiment, server is configured as：Time data is issued with the uplink time section of prescribed terminal equipment,
Terminal device is configured as：Receive the time data that server issues the period is reported to send business datum and is receiving service
The upgrade notification instruction that device is sent.
In one embodiment, it is described to include terminal device grouping:Terminal device is divided into two groups by server；One group whole
The default spreading factor of end equipment is set to SF9, and the preset time of this group of terminal device instructs place uplink time for upgrade notification
First period of next uplink time section of section；The default spreading factor of another group of terminal device is set to SF12, and the group is whole
Second period of next uplink time section of uplink time section where the preset time of end equipment is instructed for upgrade notification；Institute
It states to each group terminal device and is included in preset time with default spreading factor broadcast upgrade package：First period with
SF9 broadcasts upgrade package, and upgrade package is broadcasted with SF12 in second period.
In one embodiment, it is described that upgrade package packet is broadcasted with default spreading factor in preset time to each group terminal device
It includes：Upgrade package is split into several data packets, and broadcasts the data packet, wherein, each data packet includes sequence number and total
Packet number；Terminal device third period detection of next uplink time section of uplink time section where upgrade notification instruction is sentenced
Whether disconnected upgrading bag data has missing, if there is missing, in the data packet that the third period lacks to server request.
In one embodiment, first period is first 1/3 period of next uplink time section；
Second period is second 1/3 period of next uplink time section；The third period is described
1/3 period of third of next uplink time section.
In one embodiment, the terminal device sends business number in a random time for reporting the period
According to.
In one embodiment, the terminal device please to server in the random time of the third period
Seek the data packet of missing.
System in the present embodiment is used to perform the method in embodiment 1, and principle and effect are consistent in method, this
Embodiment is no longer described in detail.
Embodiment 3：
A kind of terminal device, the terminal device are configured as：In response to server send for notifying each group terminal
Equipment, to preset the upgrade notification instruction that spreading factor opens reception window, is instructed according to the upgrade notification right in preset time
The preset time answered opens reception window to receive the upgrade package of server broadcast with corresponding setting factor beforehand.
The present embodiment is the terminal device of 2 system of embodiment, and principle, effect and optional embodiment can be with reference implementations
Content in example 2, the present invention are not repeated to describe.
Embodiment 4：
A kind of server, the server are configured as：Terminal device is grouped；Upgrade task in response to firmware code,
It sends to notify each group terminal device in preset time with the liter of default spreading factor opening reception window to each group terminal device
Grade notification instruction and upgrade package is broadcasted with default spreading factor in preset time to each group terminal device, wherein, each group terminal
The preset time of equipment and default spreading factor differ.
The present embodiment is the server of 2 system of embodiment, and principle, effect and optional embodiment can be with reference implementation examples
Content in 2, the present invention are not repeated to describe.
Technical characteristic the foregoing is merely specific embodiments of the present invention, but the present invention is not limited thereto, Ren Heben
The technical staff in field in the field of the invention, all cover among the scope of the claims of the present invention by the variation or modification made.
Claims (10)
1. based on the upgrade method of LoRa communications, for the firmware code of upgrading terminals equipment, which is characterized in that
Including：
Terminal device is grouped；
Upgrade task in response to firmware code, server sends to notify each group terminal device default to each group terminal device
Time with preset spreading factor open the upgrade notification instruction of reception window and to each group terminal device in preset time with default
Spreading factor broadcasts upgrade package, wherein, the preset time of each group terminal device and default spreading factor differ；
Terminal device is instructed in response to the upgrade notification that server is sent, according to the upgrade notification command reception server broadcast
Upgrade package upgrading.
2. the upgrade method as described in claim 1 based on LoRa communications, which is characterized in that described be grouped terminal device is wrapped
It includes:Server is grouped according to the signal strength of each terminal device；The default spreading factor number of the strong terminal device group of signal
Value is less than the default spreading factor of the weak terminal device group of signal.
3. the upgrade method as claimed in claim 1 or 2 based on LoRa communications, which is characterized in that server issues time number
The uplink time section of prescribed terminal equipment according to this, terminal device receive the time data that server issues and the period are reported to send
Business datum and the upgrade notification instruction for receiving server transmission.
4. the upgrade method as claimed in claim 3 based on LoRa communications, which is characterized in that described be grouped terminal device is wrapped
It includes:Terminal device is divided into two groups by server；The default spreading factor of one group of terminal device is set to SF9, this group of terminal device
First period of next uplink time section of uplink time section where preset time is instructed for upgrade notification；Another group of terminal
The default spreading factor of equipment is set to SF12, and the preset time of this group of terminal device instructs place uplink time section for upgrade notification
Next uplink time section second period；It is described to be broadcasted to each group terminal device in preset time with default spreading factor
Upgrade package includes：Upgrade package is broadcasted with SF9 in first period, is broadcasted and upgraded with SF12 in second period
Packet.
5. the upgrade method as claimed in claim 4 based on LoRa communications, which is characterized in that described to exist to each group terminal device
Preset time is broadcasted upgrade package with default spreading factor and is included：Upgrade package is split into several data packets, and broadcasts the data
Packet, wherein, each data packet includes sequence number and total packet number；Terminal device uplink time section where upgrade notification instruction
The third period detection of next uplink time section judges to upgrade whether bag data has missing, if there is lacking, described the
The data packet that three periods lack to server request.
6. the upgrade method as claimed in claim 5 based on LoRa communications, which is characterized in that first period is institute
State first 1/3 period of next uplink time section；Second period is the second of next uplink time section
A 1/3 period；Third 1/3 period of the third period for next uplink time section.
7. the upgrade method as claimed in claim 5 based on LoRa communications, which is characterized in that the terminal device is on described
One random time of the section that calls time sends business datum；And/or the terminal device is at one of the third period
The data packet that random time is lacked to server request.
8. based on the upgrade-system of LoRa communications, for the firmware code of upgrading terminals equipment, which is characterized in that including server
And terminal device；
The server is configured as：Terminal device is grouped；Upgrade task in response to firmware code, sent out to each group terminal device
It send for each group terminal device to be notified to be instructed in preset time to preset the upgrade notification of spreading factor opening reception window, Yi Jixiang
Each group terminal device broadcasts upgrade package in preset time with default spreading factor, wherein, the preset time of each group terminal device and
Default spreading factor differs；
The terminal device is configured as：It instructs in response to the upgrade notification that server is sent, is instructed according to the upgrade notification
The upgrade package of server broadcast is received to upgrade.
9. a kind of terminal device, which is characterized in that the terminal device is configured as：It is used to notify in response to what server was sent
Each group terminal device is instructed in preset time with presetting the upgrade notification of spreading factor opening reception window, according to the upgrade notification
Instruction opens reception window to receive the upgrade package of server broadcast in corresponding preset time with corresponding setting factor beforehand.
10. a kind of server, which is characterized in that the server is configured as：Terminal device is grouped；In response to firmware code
Upgrading task sends that each group terminal device is notified to connect with default spreading factor opening in preset time to each group terminal device
It receives the upgrade notification instruction of window and upgrade package is broadcasted with default spreading factor in preset time to each group terminal device, wherein,
The preset time of each group terminal device and default spreading factor differ.
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| CN110769411A (en) * | 2019-10-23 | 2020-02-07 | 厦门四信通信科技有限公司 | Method, device, equipment and system for stably realizing batch OTA (over the air) upgrade of terminal equipment |
| CN111465039A (en) * | 2020-04-13 | 2020-07-28 | 中科芯集成电路有限公司 | Wireless upgrading method based on L ora technology |
| CN111970136A (en) * | 2019-05-20 | 2020-11-20 | 深圳长城开发科技股份有限公司 | Firmware upgrading method, LoRa gateway, LoRa system and computer readable storage medium |
| CN113568641A (en) * | 2021-08-02 | 2021-10-29 | 成都长城开发科技有限公司 | Wireless upgrade system |
| CN114020304A (en) * | 2022-01-06 | 2022-02-08 | 杭州字节信息技术有限公司 | LoRaWan-based OTA implementation method, terminal device and computer storage medium |
| CN114584424A (en) * | 2020-12-01 | 2022-06-03 | 深圳绿米联创科技有限公司 | Communication method, communication device, electronic equipment and computer-readable storage medium |
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| CN114584424A (en) * | 2020-12-01 | 2022-06-03 | 深圳绿米联创科技有限公司 | Communication method, communication device, electronic equipment and computer-readable storage medium |
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