CN109167615A - A method of the uplink and downlink tdm communication based on G3-PLC communication network - Google Patents
A method of the uplink and downlink tdm communication based on G3-PLC communication network Download PDFInfo
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- CN109167615A CN109167615A CN201810934591.8A CN201810934591A CN109167615A CN 109167615 A CN109167615 A CN 109167615A CN 201810934591 A CN201810934591 A CN 201810934591A CN 109167615 A CN109167615 A CN 109167615A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B3/00—Line transmission systems
- H04B3/54—Systems for transmission via power distribution lines
- H04B3/544—Setting up communications; Call and signalling arrangements
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B3/00—Line transmission systems
- H04B3/54—Systems for transmission via power distribution lines
- H04B3/56—Circuits for coupling, blocking, or by-passing of signals
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L63/00—Network architectures or network communication protocols for network security
- H04L63/04—Network architectures or network communication protocols for network security for providing a confidential data exchange among entities communicating through data packet networks
- H04L63/0428—Network architectures or network communication protocols for network security for providing a confidential data exchange among entities communicating through data packet networks wherein the data content is protected, e.g. by encrypting or encapsulating the payload
- H04L63/0435—Network architectures or network communication protocols for network security for providing a confidential data exchange among entities communicating through data packet networks wherein the data content is protected, e.g. by encrypting or encapsulating the payload wherein the sending and receiving network entities apply symmetric encryption, i.e. same key used for encryption and decryption
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L63/00—Network architectures or network communication protocols for network security
- H04L63/08—Network architectures or network communication protocols for network security for authentication of entities
- H04L63/083—Network architectures or network communication protocols for network security for authentication of entities using passwords
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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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- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Computer Security & Cryptography (AREA)
- Power Engineering (AREA)
- Computer Hardware Design (AREA)
- Computing Systems (AREA)
- General Engineering & Computer Science (AREA)
- Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
- Small-Scale Networks (AREA)
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Abstract
A method of the uplink and downlink tdm communication based on G3-PLC network, in the G3-PLC network, the G3-PLC module for being used for uplink and downlink communication is integrated in ammeter, indoor terminal integrates a G3-PLC module, the ammeter G3-PLC module uses the G3-PLC protocol communication of standard in uplink communication links with concentrator, communicates with the G3-PLC module of indoor terminal using the protocol communication based on G3-PLC media access control sublayer in downstream communications link.Pass through the uplink and downlink power line branch coupling to the extension of G3-PLC module software media access control sublayer agreement in ammeter and hardware, by the CSMA/CA mechanism in G3-PLC media access control sublayer, and communication data prioritization scheme and 128 encryption mechanism of AES and cryptographic authentication mechanisms are introduced, the uplink and downlink tdm communication method based on G3-PLC single communication network is completed.
Description
Technical field
This patent is related to power-line carrier communication field, especially a kind of uplink and downlink based on G3-PLC communication network
The method of tdm communication.
Background technique
In existing G3-PLC communication technology standard, two kinds of equipment of PAN Coordinator and PAN Device are defined,
In AMI (Advanced Metering Infrastructure) system, it is integrated in concentrator devices and ammeter equipment respectively,
Networking and communication are carried out by the DLMS/COSEM agreement and G3-PLC agreement of standard.But it is needing ammeter while supporting to pass through family
In the application scenarios of interior user terminal access, need ammeter and meanwhile support uplink and concentrator group-net communication and downlink with it is indoor
Terminal One-to-one communication, then G3-PLC standard agreement framework can not be supported, at this point, needing integrated two G3-PLC communication in ammeter
Module is communicated with uplink concentrator respectively and downlink is communicated with indoor terminal or downlink uses another independent communication party
Formula.
But two G3-PLC communication modules of uplink and downlink are integrated either in ammeter, or independent in addition using downlink
A kind of communication mode all can improve the cost of ammeter equipment, increase the complexity of system because of downlink communication module all the way is increased
Degree increases maintenance workload.In addition, if using two G3-PLC communication modules of uplink and downlink, two G3-PLC in ammeter
Communication network networking and communication simultaneously, increases collision probability, reduces communication reliability.
Summary of the invention
The purpose of the present invention is that cannot support uplink and downlink communication simultaneously for G3-PLC standard agreement framework in the prior art,
It supports that integrated two-way G3-PLC communication module is difficult to maintenance simultaneously when uplink and downlink communication and communication quality is poor in ammeter, and collects simultaneously
The problem of increasing system complexity and cost at two kinds of communication modes of uplink and downlink, proposes a kind of based on the upper of G3-PLC communication network
Downlink tdm communication method, by the uplink and downlink of the extension of G3-PLC module software media access control sublayer agreement and hardware electricity in ammeter
The coupling of line of force branch by the CSMA/CA mechanism in G3-PLC media access control sublayer, and introduces communication data priority and divides machine
System and 128 encryption mechanism of AES and cryptographic authentication mechanisms complete the uplink and downlink tdm communication based on G3-PLC single communication network
Method.
The technical scheme is that
A method of the uplink and downlink tdm communication based on G3-PLC network in the G3-PLC network, collects in ammeter
The G3-PLC module of uplink and downlink communication is used at one, indoor terminal to integrate a G3-PLC module, the ammeter G3-PLC
Module in uplink communication links with concentrator use standard G3-PLC protocol communication, in downstream communications link with indoor end
The G3-PLC module communication at end uses the protocol communication based on G3-PLC media access control sublayer.
Further, ammeter G3-PLC module downlink and indoor terminal G3-PLC module are using G3-PLCMAC sublayer
CSMA/CA communication mechanism guarantees in entire G3-PLC communication network, when ammeter uplink and downlink concurrent communication, is all based on same set of
The G3-PLC conflict avoiding mechanism of standard reduces collision probability.
Further, aforementioned ammeter G3-PLC module uses uplink and downlink power line branch coupled structure,
The module includes diode D9, capacitor C2, transformer T1, safety capacitor EC1 and EC3, and the two of the diode D9
End is in parallel with the input terminal of transformer T1, and parallel connection point TXOUTN and TXOUTP is controlled as the PLC of control signal transmitting and receiving end and ammeter
The differential signal sending and receiving end of device processed is connected, and capacitor C2 is accessed between the pin 2 and pin 4 of transformer T1, with balanced circuit impedance,
One group of output end of transformer T1 be pin 10 and pin 7, pin 10 concatenate safety capacitor EC1 after with pin 7 as ammeter
Lead-in wire terminal LINE_IN and NEUTRAL_IN are connected with concentrator, and another group of output end of transformer T1 is pin 9 and pin 6, draw
Leading-out terminal LINE_OUT and NEUTRAL_OUT and indoor terminal phase after the concatenation of foot 9 safety capacitor EC3 with pin 6 as ammeter
Even, to realize, PLC controls signal to uplink and downlink branch coupling simultaneously all the way.
Further, the data of ammeter G3-PLC module, which are sent, uses communication data prioritization scheme, according to preferential
Grade size preferentially sends the higher data of priority；It include: 0- uplink event reported data and control command, in 1- downlink event
Count off evidence and control command, 2- downlink copy reading data, 3- uplink copy reading data, wherein 0 highest of priority and priority 3 is minimum,
In this way, not only reducing collision probability, but also improve preferential reliable transmission when network concurrent communicates to significant data.
Further, the communication protocol of ammeter G3-PLC module and indoor terminal G3-PLC module introduces AES 128 and encrypts
Mechanism carries out coded communication data, for encrypting the user data of ammeter and indoor terminal chain road, due to ammeter G3-PLC mould
The G3-PLC agreement that standard is used in the communication of block uplink and concentrator, has had perfect encryption mechanism, in this way, ensuring that
The safety of data communication in entire G3-PLC agreement framework.
Further, it in ammeter in the communication protocol of G3-PLC module and indoor terminal G3-PLC module, introduces ammeter and sets
Standby cryptographic acess mechanism carries out encryption certification when indoors terminal accesses ammeter.Cryptographic acess of the indoor terminal to ammeter
Mechanism specifically refers to: in ammeter in G3-PLC module downlink and the communication of indoor terminal G3-PLC module, indoor terminal user needs
The access password for inputting ammeter could read the configuration of the data and change ammeter in ammeter.
Beneficial effects of the present invention:
The method that the present invention uses the uplink and downlink tdm communication based on G3-PLC communication network, efficiently solves standard
G3-PLC agreement framework does not support uplink and downlink while communicating that ammeter will support uplink and downlink while the integrated two G3-PLC communication of communication
Communication efficiency is poor when module, is difficult to safeguard, or increases the defect of system complexity and cost using two kinds of independent communication modes.
It is coupled by the extension to G3-PLC, and to hardware uplink and downlink power line branch, standard G3-PLC agreement frame is based on using uplink
Structure, downlink is based on G3-PLC media access control sublayer, by the CSMA/CA mechanism of media access control sublayer, and introduces the division of communication data priority
Mechanism and 128 encryption mechanism of AES and user password access mechanism, realize uplink and downlink timesharing based on G3-PLC network,
Reliably, safe communication construction, and the complexity of system architecture is reduced, reduce the cost of ammeter equipment.
Other features and advantages of the present invention will then part of the detailed description can be specified.
Detailed description of the invention
Exemplary embodiment of the invention is described in more detail in conjunction with the accompanying drawings, it is of the invention above-mentioned and its
Its purpose, feature and advantage will be apparent, wherein in exemplary embodiment of the invention, identical reference label
Typically represent same parts.
Fig. 1 is network architecture schematic diagram of this patent based on G3-PLC；
Fig. 2 is the uplink and downlink communication Extended Protocol configuration diagram based on G3-PLC；
Fig. 3 is the uplink and downlink branch coupling circuit figure of ammeter G3-PLC module；
Fig. 4 is ammeter uplink and downlink communication data according to priority transmission flow figure.
Specific embodiment
The preferred embodiment that the present invention will be described in more detail below with reference to accompanying drawings.Although showing the present invention in attached drawing
Preferred embodiment, however, it is to be appreciated that may be realized in various forms the present invention without the embodiment party that should be illustrated here
Formula is limited.
A kind of uplink and downlink tdm communication method based on G3-PLC network, including the G3-PLC to G3-PLC module in ammeter
Agreement media access control sublayer protocol extension refers to ammeter in the integrated module of G3-PLC all the way, and uplink uses the G3-PLC agreement of standard
It is communicated with concentrator, and downlink is then based on G3-PLC Standard MAC sublayers agreement and indoor terminal communicates, while indoor terminal
G3-PLC module is also based on G3-PLC Standard MAC sublayers.
G3-PLC PAN Device module hardware in ammeter is coupled using uplink and downlink power line branch, is referred in ammeter
In an integrated G3-PLC module, uplink and ammeter power line inlet end (LINE_IN, NEUTRAL_ in such as Fig. 3 are being kept
IN) on the basis of circuit coupling, increase downlink and ammeter power line outlet end (LINE_OUT, NEUTRAL_ in such as Fig. 3 all the way
OUT) the circuit coupled.In Fig. 3, output difference signal when TXOUTP and TXOUTN are sent for PLC, using subsequent coupling
Circuit is sent on power line；PLC signal coupling circuit T1 herein uses multi-coil coupled modes, makes PLC transmitting-receiving all the way
Signal simultaneously be coupled to ammeter lead-in wire terminal LINE_IN and NEUTRAL_IN and ammeter leading-out terminal LINE_OUT and
NEUTRAL_OUT, since in practical application scene, concentrator is connected with ammeter lead-in wire terminal, indoor terminal and ammeter leading-out terminal
Connection, thereby realizing PLC signal all the way, branch couples simultaneously to uplink and downlink.
Ammeter and indoor terminal communication protocol architecture are based on G3-PLC media access control sublayer, by G3-PLC media access control sublayer CSMA/
CA mechanism refers in G3-PLC module downlink is communicated with indoor terminal in ammeter G3-PLC media access control sublayer agreement, using G3-
CSMA/CA mechanism in PLC standard guarantees in entire G3-PLC communication network, when ammeter uplink and downlink concurrent communication, is all based on
The G3-PLC conflict avoiding mechanism of same set of standard reduces collision probability.
Communication data prioritization scheme refers to that G3-PLC module is when sending data in ammeter, draws to the data of transmission
Divide priority, including 0- uplink event reported data and control command, 1- downlink event reported data and control command, 2- downlink
Copy reading data, 3- uplink copy reading data, wherein 0 highest of priority, priority 3 are minimum, for preferentially guaranteeing event reported data
The real-time communication experience of transmission and user with control command.In this way, not only reducing collision probability, but also improve network concurrent
To the preferential reliable transmission of significant data when communication.
Ammeter downlink and 128 encryption mechanism of AES of indoor terminal communication refer in ammeter G3-PLC module downlink and indoor
In the communication of terminal G3-PLC module, on the basis of being based on G3-PLC media access control sublayer, 128 encryption mechanism of AES is introduced, for adding
The user data of cipher telegram table and indoor terminal chain road, due to using mark in the communication of ammeter G3-PLC module uplink and concentrator
Quasi- G3-PLC agreement, has had perfect encryption mechanism, in this way, ensuring that the entire G3-PLC agreement framework in this project
The safety of middle data communication.
Indoor terminal refers to G3-PLC module downlink and indoor terminal G3-PLC in ammeter to the cryptographic acess mechanism of ammeter
In module communication, indoor terminal user needs to input the access password of ammeter, could read data and change ammeter in ammeter
Configuration, due in the communication of ammeter G3-PLC module uplink and concentrator use standard G3-PLC and DLMS/COSEM assist
View, has had perfect authentication mechanism, in this way, ensuring that in entire G3-PLC agreement framework in this patent to ammeter equipment
The safety of access.Wherein, code key and user password are encrypted in the installation process of ammeter and indoor terminal, distributes to each use
Family, and user's modification authority is set, to guarantee the safety and confidentiality of each user data transmission and equipment access.
Various embodiments of the present invention are described above, above description is exemplary, and non-exclusive, and
It is not limited to disclosed each embodiment.Without departing from the scope and spirit of illustrated each embodiment, for this skill
Many modifications and changes are obvious for the those of ordinary skill in art field.
Claims (6)
1. a kind of method of the uplink and downlink tdm communication based on G3-PLC network, in the G3-PLC network, integrated in ammeter
One is used for the G3-PLC module of uplink and downlink communication, and indoor terminal integrates a G3-PLC module, it is characterised in that: the electricity
Table G3-PLC module uses the G3-PLC protocol communication of standard in uplink communication links with concentrator, in downstream communications link
It is communicated with the G3-PLC module of indoor terminal using the protocol communication based on G3-PLC media access control sublayer.
2. a kind of method of uplink and downlink tdm communication based on G3-PLC network according to claim 1, which is characterized in that
Ammeter G3-PLC module downlink and indoor terminal G3-PLC module use the CSMA/CA communication mechanism of G3-PLC media access control sublayer, with
Realize conflict avoiding.
3. a kind of method of uplink and downlink tdm communication based on G3-PLC network according to claim 1 or 2, feature exist
Use uplink and downlink power line branch coupled structure in, aforementioned ammeter G3-PLC module, the module include diode D9, capacitor C2,
Transformer T1, safety capacitor EC1 and EC3, the both ends of the diode D9 are in parallel with the input terminal of transformer T1, point in parallel
TXOUTN and TXOUTP is connected as control signal transmitting and receiving end with the differential signal sending and receiving end of the PLC controller of ammeter, transformer
Capacitor C2 is accessed between the pin 2 and pin 4 of T1, with balanced circuit impedance, one group of output end of transformer T1 is 10 He of pin
Pin 7, pin 10 concatenate lead-in wire terminal LINE_IN and NEUTRAL_IN and concentration with pin 7 as ammeter after safety capacitor EC1
Device is connected, and another group of output end of transformer T1 is pin 9 and pin 6, pin 9 concatenate after safety capacitor EC3 with 6 conduct of pin
The leading-out terminal LINE_OUT and NEUTRAL_OUT of ammeter are connected with indoor terminal, and to realize, PLC controls signal to uplink and downlink all the way
Branch coupling simultaneously.
4. a kind of method of uplink and downlink tdm communication based on G3-PLC network according to claim 1, which is characterized in that
The data of ammeter G3-PLC module, which are sent, uses communication data prioritization scheme, is preferentially sent according to priority size preferential
The higher data of grade；It include: 0- uplink event reported data and control command, 1- downlink event reported data and control command,
2- downlink copy reading data, 3- uplink copy reading data, wherein 0,1,2,3 priority of priority successively reduces.
5. a kind of method of uplink and downlink tdm communication based on G3-PLC network according to claim 1, which is characterized in that
The communication protocol of ammeter G3-PLC module and indoor terminal G3-PLC module introduces 128 encryption mechanism of AES, carries out coded communication
Data.
6. a kind of method of uplink and downlink tdm communication based on G3-PLC network according to claim 1, which is characterized in that
In ammeter in the communication protocol of G3-PLC module and indoor terminal G3-PLC module, the cryptographic acess mechanism of ammeter equipment is introduced,
When indoors terminal accesses ammeter, encryption certification is carried out.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810934591.8A CN109167615B (en) | 2018-08-16 | 2018-08-16 | Uplink and downlink time-sharing communication method based on G3-PLC communication network |
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| CN201810934591.8A CN109167615B (en) | 2018-08-16 | 2018-08-16 | Uplink and downlink time-sharing communication method based on G3-PLC communication network |
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| CN109167615A true CN109167615A (en) | 2019-01-08 |
| CN109167615B CN109167615B (en) | 2021-08-10 |
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Cited By (1)
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| CN111489522A (en) * | 2020-05-29 | 2020-08-04 | 北京百度网讯科技有限公司 | Method, device and system for outputting information |
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