CN108173344A - LORA wireless communication techniques are in the application process of low-voltage distribution transformer platform district - Google Patents
LORA wireless communication techniques are in the application process of low-voltage distribution transformer platform district Download PDFInfo
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- CN108173344A CN108173344A CN201711481773.6A CN201711481773A CN108173344A CN 108173344 A CN108173344 A CN 108173344A CN 201711481773 A CN201711481773 A CN 201711481773A CN 108173344 A CN108173344 A CN 108173344A
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- 238000004891 communication Methods 0.000 title claims abstract description 50
- 238000000034 method Methods 0.000 title claims abstract description 42
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Classifications
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- H02J13/0075—
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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
- H04L67/12—Protocols specially adapted for proprietary or special-purpose networking environments, e.g. medical networks, sensor networks, networks in vehicles or remote metering networks
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L9/00—Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols
- H04L9/06—Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols the encryption apparatus using shift registers or memories for block-wise or stream coding, e.g. DES systems or RC4; Hash functions; Pseudorandom sequence generators
- H04L9/0618—Block ciphers, i.e. encrypting groups of characters of a plain text message using fixed encryption transformation
- H04L9/0631—Substitution permutation network [SPN], i.e. cipher composed of a number of stages or rounds each involving linear and nonlinear transformations, e.g. AES algorithms
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W12/00—Security arrangements; Authentication; Protecting privacy or anonymity
- H04W12/02—Protecting privacy or anonymity, e.g. protecting personally identifiable information [PII]
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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
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02B90/20—Smart grids as enabling technology in buildings sector
-
- 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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- 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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
-
- 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
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S40/00—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them
- Y04S40/12—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them characterised by data transport means between the monitoring, controlling or managing units and monitored, controlled or operated electrical equipment
- Y04S40/126—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them characterised by data transport means between the monitoring, controlling or managing units and monitored, controlled or operated electrical equipment using wireless data transmission
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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
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S40/00—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them
- Y04S40/20—Information technology specific aspects, e.g. CAD, simulation, modelling, system security
Abstract
The present invention relates to LORA wireless communication techniques low-voltage distribution transformer platform district application process,Communication system includes terminal device,LoRa gateways,Distribution transformer terminals and main equipment,LoRa modules are respectively connected in multiple terminal devices,The LoRa modules are connect by built-in chip type or RS485 interfaces with terminal device,Multiple terminal devices are carried out data transmission by LoRa wireless networks and LoRa gateways,Carried out data transmission between the LoRa gateways and distribution transformer terminals by RS485 networks,Carried out data transmission between the distribution transformer terminals and main equipment by GPRS signals,The present invention is LPWAN (low-power consumption wide area network) wireless communication technique using newest Internet of Things LORA,Its appearance changes considered mode about the compromise of transmission range and power consumption in the past,Provide a kind of can simply realize at a distance to the user,Long battery life,The system of large capacity,And then extend sensing network.
Description
Technical field
The present invention relates to LORA wireless communication techniques low-voltage distribution transformer platform district application process.
Background technology
Power distribution station supply district is more dispersed at present, and supply path is long, and the responsible range of taiwan area manager is bigger,
When low-voltage equipment failure has a power failure, repair personnel requires a great deal of time and energy investigates trouble point, greatly
Big reliability, safety and the stability for reducing residential electricity consumption.
With rural economy, culture, the continuous improvement of living standard, wast rural area is to power supply scale, power supply capacity, power supply
Quality has the demand of high quality, and the power supply quality in rural area is not singly a kind of market behavior, it is related to the steady of wast rural area
The problem of determining, being also related to Science in Future in China sustainable development, thus it is possible to which no safeguard rural power grids and be to rural area normal power supply
The Duty demands of power supply department.
At present, the unit exception of distribute-electricity transformer district, trouble shoot, maintenance management etc. also exist and cannot find, locate in time in time
The problem of reason.It is mainly reflected in following several respects：
(1) electric network composition in rural area is weak.Rural power grids are mostly radiation network, and ring network power supply range is small, load transfer ability
Difference, accident, power failure range are big, and power supply reliability is poor.
(2) power quality is low.With rural power grids power load rapid development, existing medium voltage distribution network is because conducting wire is thin, returns
Road is few, and distribution transforming is layouted the factors such as insufficient, reactive compensation capacity shortcoming, and rate of qualified voltage is generally relatively low, and the low pressure of rural power grids is caused to set
It is standby to be not normally functioning, reduce the safety of electricity consumption.
(3) equipment is outmoded, the general level of the health is low, safety and poor reliability.Lack integrated management, management level is low.Due to
Management level is low, can not prejudge failure in advance, and Frequent Troubles cause certain economic loss.
(4) lack of long-term planning is busy with dealing with Problems Existing.It is planned due to lacking, the distribution transformer distribution of rural power grids is not
Rationally, low-pressure line-outgoing circuit is full of twists and turns, and the failure for directly contributing rural power grids electric power transmission line circuit is occurred frequently.
Controller switching equipment in distribute-electricity transformer district is acquired with distribution transformer terminals communication information mainly with GPRS/CDMA, carrier wave, small wireless
Collection, which is copied, to be waited based on communication modes, in existing communication modes, is responsible for acquiring the real time data of communication apparatus by trunk module, is passed through
GPRS transmission is cascaded to communication adapter, then by communication adapter and distribution transformer terminals, and master is transferred data to by distribution transformer terminals
It stands system.Leakage protects equipment with trunk module because using 485 communications such as in Zhejiang Province's residual current action protector monitoring system
Mode, warning information must be acquired by trunk module, can not be realized abnormal active alarm truly, be affected system
Real-time；It is protected due to family and communication is not implemented, affect the implementation that " last one kilometer " channel is communicated in low voltage electric network；Distribution transforming platform
The equipment such as temperature controller, access controller, intelligent capacitor controller in area are mainly based on wired RS485 communication modes.It is practical
In, collector communication failure is more, and installation and debugging are complicated, and trouble shoot difficulty is big, installs communication apparatus additional and causes in-site installation
Situations such as difficulty, field installation process unsightly, influence look of a village village looks, and O＆M difficulty is big.These communication modes, which exist simultaneously, to be made
Huge numerous and diverse into communication system, cumbersome, data acquisition success rate is not high, and data block serious and high in the presence of communication rate
High, the drawbacks of O＆M difficulty is big；The problems such as equipment is complicated there are panel operation, and each producer's panel sets differentiation, is protected in leakage, increases
The use difficulty of basic staff, meanwhile, when leakage is protected, and tripping fault occurs, there are service personnel's fault location to expend duration,
The problems such as overhaul efficiency is low.
Monitoring device in rural power grids distribute-electricity transformer district mainly includes temperature controller, access controller, intelligent capacitor controller etc., this
A little equipment are mainly cascaded with wired RS485 and distribution transformer terminals, and distribution transformer terminals carry out these monitoring devices data acquisition and teletransmission
Main station system.In practical application, because using wired mode, communication apparatus causes in-site installation difficult, and O＆M difficulty is big etc. is installed additional
Problem.
These communication modes exist simultaneously, and cause communication system huge numerous and diverse, cumbersome, and data acquisition success rate is not
Height, data block the problems such as serious, and there is the drawbacks of communication rate are high, O＆M difficulty is big.
At present, the acquisition system of electric energy meter and rural power grids residual current action protector monitoring system are to separate, electric energy meter
Acquisition is mainly copied etc. with GPRS/CDMA, carrier wave, small wireless collection based on communication modes.In actual use, carrier communication easily by
Power utilization environment interferes, and meter reading is caused to fail；And the small wireless collection that current market uses is copied mainly based on zigbee communication modes,
Because zigbee communication distances are limited, generally at 200 meters or so, practical ranges are seriously limited.GPRS/CDMA communication parties
Formula, there is also some drawbacks, such as in remote mountain areas, signal may cover not exclusively or signal is weaker, also can all cause
Meter reading fails, and influences system function.Meanwhile using GPRS/CDMA communication modes, post and telecommunication tariff is also that a no small fund is paid
Go out.
Invention content
In order to solve the technical issues of above-mentioned, the object of the present invention is to provide a kind of LORA wireless communication techniques to match in low pressure
Become the application process of taiwan area, this method causes low-voltage distribution transformer platform district power supply quality to greatly improve.
To achieve these goals, present invention employs following technical solutions：
LORA wireless communication techniques low-voltage distribution transformer platform district application process, communication system include terminal device, LoRa nets
Close, distribution transformer terminals and main equipment, be respectively connected with LoRa modules in multiple terminal devices, the LoRa modules by built-in chip type or
Person's RS485 interfaces are connect with terminal device, and multiple terminal devices are carried out data transmission by LoRa wireless networks and LoRa gateways,
Carried out data transmission between the LoRa gateways and distribution transformer terminals by RS485 networks, between the distribution transformer terminals and main equipment
Carried out data transmission by GPRS signals, communication steps are as follows：
A), networking certification, terminal must carry out an adition process, terminal before data exchange is participated in LoRa gateways
Equipment must carry out primary new adition process when losing session information every time, and adition process needs terminal progress individual character to set
It puts, setting information includes DevEUI, AppEUI, AppKey, and DevEUI is IEEE-EUI64 device addresses, and AppEUI is IEEE-
EUI64 application address, AppKey are AES-128 application secret keys；
B) when, equipment adds in network by over the air, OTA, AppKey is used for deriving AppSkey and NwkSKey to encrypt
It is transmitted with verification, terminal does not need to the setting of any NwkSKey, just can be in the internetwork roaming of the network of different suppliers；
C), terminal device, which adds in network, needs two MAC information exchanging process：Join-Request and Jion-Accept；
Join-Request message is initiated from terminal, the random number DevNonce including AppEUI, DevEUI and two bytes；LoRa
The specific random numbers sended over before gateway tracing equipment terminal, ignore that this terminal sends later with other with
Any addition request of machine number；
D), LoRa gateways can make reply, i.e. Jion-Accept message to adding in application, Jion-Accept message and general
Logical downstream message is the same, unique the difference is that being replaced with JOIN_ACCEPT_DELAY1 and JOIN_ACCEPT_DELAY2
RECEIVE_DELAY1 and RECEIVE_DELAY2 is not allowed to if adding in request, does not have Jion-Accept message；
E), under electronic codebook mode pattern, LoRa gateways encrypt Jion-Accept message, terminal with AES decryption oprerations
Equipment just decrypts message using AES encryption operation.
Preferably：The terminal device include temperature controller, intelligent capacitor controller, protector, electric energy meter or
Access controller.
The present invention is LPWAN (low-power consumption wide area network) wireless communication technique using newest Internet of Things LORA, it changes
Become and considered mode about the compromise of transmission range and power consumption in the past, remote, length can simply be realized by providing one kind to the user
The system of battery life, large capacity, and then extend sensing network.
The implementation of the present invention can improve supply voltage quality, improve power supply reliability, power consumption management level be substantially improved, together
When with splendid economic benefit.1) power loss is reduced, can reduce the power loss of feeder ear and user terminal, 2) improve taiwan area
Power factor (PF), reduce the generation of low-voltage, 3) improve the load capacity of circuit, for the relatively low circuit of capacity-load ratio, extend
Its service life, reduce improvement expenses, 4) distribution transforming three-phase imbalance rate is reduced, and therefore reduce the operation damage of power distribution network
Consumption, while the safety of low-voltage platform area operation is improved, extend the service life of low-voltage platform area equipment.5) shorten line fault to search
Time substantially reduces labor intensity, improves power supply quality and reliability, reduces loss of outage.
The more potential professions of guiding are carried out technology leather by the promotion and application of the present invention using LoRa wireless communication techniques
Newly, the replacement of a large amount of cables, collector, accessory power supply and tank material is saved, realizes " covering entirely for intellective protector communication
Lid, full monitoring, full early warning, full guard ", with reference to fine work taiwan area construction, improves the aesthetics of low-voltage power facility, power-assisted look of a village
The rectification of village's looks, General Promotion rural safe electricity consumption level resident and living standard；Meanwhile reduce the wave of enterprise's raw material
Take, saved a large amount of energy and human cost, greatly improve the economic benefit of enterprise, the development that will also promote environmental protection cause,
The economy for electricity consumption, safety and reliability are promoted, the generation of the fire incident as caused by low-voltage power supply failure is reduced, will produce
Raw huge social benefit.
Description of the drawings
Fig. 1 is the system structure diagram of the present invention.
Fig. 2 is the group-network construction schematic diagram of the present invention.
Fig. 3 is the topological structure schematic diagram that the present invention uses.
Specific embodiment
The embodiment of the present invention is described below in detail, the example of the embodiment is shown in the drawings, wherein from beginning to end
Same or similar label represents same or similar element or the element with same or like function.Below with reference to attached
The embodiment of figure description is exemplary, it is intended to for explaining the present invention, and is not considered as limiting the invention.
LORA wireless communication techniques as shown in Figure 1, Figure 2 and Figure 3 are in the application process of low-voltage distribution transformer platform district, communication system
Including terminal device, LoRa gateways, distribution transformer terminals and main equipment, LoRa modules are respectively connected in multiple terminal devices, it is described
LoRa modules are connect by built-in chip type or RS485 interfaces with terminal device, and multiple terminal devices pass through LoRa wireless networks
Carry out data transmission with LoRa gateways, carried out data transmission between the LoRa gateways and distribution transformer terminals by RS485 networks, institute
It states and is carried out data transmission between distribution transformer terminals and main equipment by GPRS signals, communication steps are as follows：
Networking certification, terminal must carry out an adition process before data exchange is participated in LoRa gateways, and terminal is set
Standby that primary new adition process must be carried out when losing session information every time, adition process needs terminal to carry out individual character setting,
Setting information includes DevEUI, AppEUI, AppKey, and DevEUI is IEEE-EUI64 device addresses, and AppEUI is IEEE-
EUI64 application address, AppKey are AES-128 application secret keys；
When equipment adds in network by over the air, OTA, AppKey is used for deriving AppSkey and NwkSKey to encrypt and test
Card transmission, terminal do not need to the setting of any NwkSKey, just can be in the internetwork roaming of the network of different suppliers；
Terminal device, which adds in network, needs two MAC information exchanging process：Join-Request and Jion-Accept；
Join-Request message is initiated from terminal, the random number DevNonce including AppEUI, DevEUI and two bytes；LoRa
The specific random numbers sended over before gateway tracing equipment terminal, ignore that this terminal sends later with other with
Any addition request of machine number；
LoRa gateways can make replys, i.e. Jion-Accept message to adding in application, Jion-Accept message and commonly
Downstream message it is the same, it is unique unlike replaced with JOIN_ACCEPT_DELAY1 and JOIN_ACCEPT_DELAY2
RECEIVE_DELAY1 and RECEIVE_DELAY2 is not allowed to if adding in request, does not have Jion-Accept message；
Under electronic codebook mode pattern, LoRa gateways encrypt Jion-Accept message with AES decryption oprerations, and terminal is set
It is standby that message is just decrypted using AES encryption operation.
The terminal device includes temperature controller, intelligent capacitor controller, protector, electric energy meter or access controller.
LoRa is a kind of spread spectrum, is not Direct Sequence Spread Spectrum.Direct Sequence Spread Spectrum is passed by modulating carrier chip
Defeated more frequency spectrums, so as to improve coding gain.And LoRa modulation is similar with multimode FSK modulation, is come using unmodulated carrier
Linear frequency modulation is carried out, energy is made to be distributed to wider frequency range, realizes telecommunication.
From the point of view of network structure, the LoRa network architectures are a typical star topologies, in this network architecture,
LoRa gateways are the relayings of a transparent transmission, connect terminal device and rear end central server.Pass through between gateway and server
Standard IP connections, terminal device is using single-hop and one or more gateway communications.It is two-way between all nodes and gateway
Letter, while the operations such as high in the clouds upgrading is also supported to reduce high in the clouds communication time.The Star Network structure that LoRa is used simplifies logical
The complexity of letter, LoRa protocol layers are realized in addition uplink and downlink channel selection, channel monitoring, the functions such as retransmission mechanism carry significantly
The high stability of LoRa communications and pressure-resistant performance.
IP Security is ensured using only network key (EU164) in terms of safety, using uniquely using key
(EU164) and ensure application layer end-by-end security, equipment access safety is ensured using the special key of equipment (EUI128).It is all
The content of equipment is encrypted using encryption polymerization methods, ensure that the safety of data transmission.User uses in order to prevent simultaneously
Electric data are analyzed, and user power utilization data need to have secret protection ability.
For networking certification, terminal must carry out an adition process before data exchange is participated in LoRa gateways.Eventually
End equipment must carry out primary new adition process when losing session information every time.Adition process needs terminal progress individual character to set
It puts, setting information includes DevEUI, AppEUI, AppKey.DevEUI is IEEE-EUI64 device addresses.AppEUI is IEEE-
EUI64 application address.AppKey is AES-128 application secret keys.
When equipment adds in network by over the air, OTA, AppKey is used for deriving AppSkey and NwkSKey to encrypt and test
Card transmission.Therefore, terminal does not need to the setting of any NwkSKey, so terminal becomes in the internetwork roaming of the network of different suppliers
It obtains easily.
Terminal device, which adds in network, needs two MAC information exchanging process：Join-Request and Jion-Accept.
Join-Request message is initiated from terminal, the random number DevNonce including AppEUI, DevEUI and two bytes.LoRa
The specific random numbers sended over before gateway tracing equipment terminal, ignore that this terminal sends later with other with
Any addition request of machine number.This mechanism can prevent Replay Attack (Replay Attracts).Such as：Before transmission
The addition information of record, it is intended that disconnect each node from network.
Join-Request message is not encrypted, and message integrity code MIC value computational methods are as follows：
Cmac=aes128_cmac (AppKey, MHDR | AppEUI | DevEUI | DevNonce)
MIC=cmac [0..3]
LoRa gateways can make reply, i.e. Jion-Accept message to adding in application.Jion-Accept message and common
Downstream message it is the same, it is unique unlike replaced with JOIN_ACCEPT_DELAY1 and JOIN_ACCEPT_DELAY2
RECEIVE_DELAY1 and RECEIVE_DELAY2.If adding in request not to be allowed to, Jion-Accept message is not had.
AppNonce is that the random number that LoRa gateways provide or some ID, terminal device derive network session with it
It is as follows to generate algorithm for secret key (NwkSKey) and utility cession secret key (AppSKey)：
NwkSKey=aes128_encrypt (AppKey, 0x01 | AppNonce | NetID | DevNonce | pad16)
AppSKey=aes128_encrypt (AppKey, 0x02 | AppNonce | NetID | DevNonce | pad16)
The computational methods of MIC are as follows：
Cmac=aes128_cmac (AppKey, MHDR | AppNonce | NetID | DevAddr | RFU | RxDelay |
CFList)
MIC=cmac [0..3]
The message of Jion-Accept is encrypted with AppKey, and Encryption Algorithm is as follows：
aes128_decrypt(AppKey,AppNonce|NetID|DevAddr|RFU|RxDelay|CFList|MIC)
Under ECB (electronic codebook mode) pattern, LoRa gateways encrypt Jion-Accept message, institute with AES decryption oprerations
Message can be decrypted with AES encryption operation with terminal device.By this method, terminal device only needs to perform cryptographic operation
Without performing decryption oprerations.
Realization LoRa long ranges, the cordless communication network of low-power consumption.Only network key is used in terms of safety
(EU164) ensure IP Security, using uniquely using key (EU164) and ensureing application layer end-by-end security, using setting
Standby special key (EUI128) ensures equipment access safety.The content of all devices is encrypted using ES128 modes, ensure that
The safety of data transmission.System architecture design based on Internet of Things, needs the system and national grid that meet Internet of Things simultaneously
Specification.
In order to protect the integrality of the privacy of user and data in intelligent grid, most straightforward approach is to carry out data to add
It is close, however, this will cause carries out a large amount of decryption calculating in control centre.Polymerization technique can substantially reduce in power grid communication,
It calculates and storage overhead, the aggregation scheme with reference to secret protection is solve the problems, such as mass data secure communication in intelligent grid one
A method, currently existing scheme is based primarily upon safety signal processing mostly, less efficient based on homomorphism and multi-party computations.This
Scheme is intended using the encryption aggregation scheme with secret protection so that mass data reaches control centre safe efficiently, simultaneously
Protect user data privacy.
Concrete scheme is described as follows：
Key generates：System generation series of parameters (p, q) obtains n=pq and λ=lcm (p-1, q-1), defines one
A power functionWherein, public key be pk=(n, g), private key
For sk=(λ, μ).
Data encryption：The intelligent terminals such as intelligence instrument are to electricity consumption data m ∈ ZnIt is encrypted.One number of generation at randomThen generation ciphertext c=E (m)=gm·rnmodn2。
Data deciphering:Control centre is to the ciphertext of acquisitionIt is decrypted, obtains plaintext m=D (c)=L (cλmod
n2)·μmod n.Control centre can obtain the summation of residential quarter electricity consumption data in this way, without knowing the use of each family user
Electric data.This programme is capable of confidentiality, the integrality of effective protection user power utilization data, while improves the efficiency of encryption and decryption.
It should be pointed out that above example is only the representative example of the present invention.The present invention can also there are many deform.It is every
Any simple modification, equivalent change and modification that essence according to the present invention makees above example is considered as belonging to this
The protection domain of invention.
Claims (2)
1.LORA wireless communication techniques are in the application process of low-voltage distribution transformer platform district, it is characterised in that：Communication system is set including terminal
Standby, LoRa gateways, distribution transformer terminals and main equipment are respectively connected with LoRa modules in multiple terminal devices, and the LoRa modules pass through
Built-in chip type or RS485 interfaces are connect with terminal device, multiple terminal devices by LoRa wireless networks and LoRa gateways into
Row data transmission is carried out data transmission between the LoRa gateways and distribution transformer terminals by RS485 networks, the distribution transformer terminals and
Carried out data transmission between main equipment by GPRS signals, communication steps are as follows：
A) networking certification, terminal must carry out an adition process, terminal device before data exchange is participated in LoRa gateways
Primary new adition process must be carried out when losing session information every time, adition process needs terminal to carry out individual character setting, if
Confidence breath includes DevEUI, AppEUI, AppKey, and DevEUI is IEEE-EUI64 device addresses, and AppEUI is IEEE-EUI64
Application address, AppKey are AES-128 application secret keys；
B) when equipment adds in network by over the air, OTA, AppKey is used for deriving AppSkey and NwkSKey to encrypt and verify
Transmission, terminal do not need to the setting of any NwkSKey, just can be in the internetwork roaming of the network of different suppliers；
C) terminal device, which adds in network, needs two MAC information exchanging process：Join-Request and Jion-Accept；Join-
Request message is initiated from terminal, the random number DevNonce including AppEUI, DevEUI and two bytes；LoRa gateways
The specific random numbers sended over before tracing equipment terminal, ignore that this terminal sends later with other random numbers
Any addition request；
D) LoRa gateways can make replys, i.e. Jion-Accept message to adding in application, Jion-Accept message and commonly
Downstream message is the same, unique the difference is that replacing RECEIVE_ with JOIN_ACCEPT_DELAY1 and JOIN_ACCEPT_DELAY2
DELAY1 and RECEIVE_DELAY2 is not allowed to if adding in request, does not have Jion-Accept message；
E) under electronic codebook mode pattern, LoRa gateways encrypt Jion-Accept message, terminal device with AES decryption oprerations
Just message is decrypted using AES encryption operation.
2. LORA wireless communication techniques according to claim 1 are in the application process of low-voltage distribution transformer platform district, it is characterised in that：
The terminal device includes temperature controller, intelligent capacitor controller, protector, electric energy meter or access controller.
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