CN109565298A - The connection method and PLC device of PLC device - Google Patents

The connection method and PLC device of PLC device Download PDF

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Publication number
CN109565298A
CN109565298A CN201780048201.0A CN201780048201A CN109565298A CN 109565298 A CN109565298 A CN 109565298A CN 201780048201 A CN201780048201 A CN 201780048201A CN 109565298 A CN109565298 A CN 109565298A
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CN
China
Prior art keywords
opposite equip
code key
network
plc device
plc
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CN201780048201.0A
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Chinese (zh)
Inventor
罗素
张明
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Huawei Technologies Co Ltd
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Huawei Technologies Co Ltd
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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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00—Data switching networks

Abstract

This application discloses a kind of connection method of PLC device and PLC devices, by the first network message broadcasted according to opposite equip., judge whether opposite equip. is PLC device；Wherein, first network is non-PLC network；If so, carrying out code key certification with opposite equip., authenticate by then establishing power line communications link with opposite equip..To realize between PLC device through message interaction, confirms identity and be automatically performed code key certification, quickly establish the connection of PLC device, improve the efficiency of PLC device connection.

Description

The connection method and PLC device of PLC device
This application claims Patent Office of the People's Republic of China was submitted on 03 03rd, 2017, application No. is 201710124835.1, a kind of priority of the Chinese patent application of entitled " method and apparatus of Homeplug connection ", entire contents are hereby incorporated by reference in the application.
Technical field
The invention relates to the connection methods and PLC device of power line communication more particularly to a kind of PLC device.
Background technique
Power line communication (Power Line Communication, PLC) technology refers to a kind of communication mode using power line transmission data and media signal.Homeplug is to utilize a kind of terminal communication device of this principle similar with home gateway, and only home gateway uses telephone wire or network cable transmission data, and Homeplug uses power line transmission data.Homeplug is modulated at digital broadband signal in certain signal frequency range and is loaded into 220V alternating current and transmitted, on any one node in this way in power grid scope, modulated signal in power grid can be demodulated to original wideband digital signal by another Homeplug, power net is achieved the purpose that become broadband network.
There are three types of connection types for Homeplug in the prior art, the first is to press that the key of two Homeplugs connected is needed to match respectively by user；Second is the device password (Device Password, DPW) for being manually entered another Homeplug on the configuration IE page of a Homeplug by user, and DPW can be usually read out from the nameplate of power modem device；The third is to be manually entered network cipher (the Network Password for needing another Homeplug being attached on the configuration IE page of a Homeplug by user, NPW), however the NPW of another Homeplug also needs user to read and insert in the configuration page for the Homeplug being attached thereto in the configuration IE page of the Homeplug.Above-mentioned connection procedure is relatively complicated, it is necessary to which user's manual operation causes setting to perplex to user.
Summary of the invention
The technical issues of the embodiment of the present application provides the connection method and PLC device of a kind of PLC device, needs user to be manually operated for solving PLC device connection in the prior art, and joint efficiency is low, poor operability.
In a first aspect, the embodiment of the present application provides a kind of connection method of PLC device, comprising: according to the first network message that opposite equip. is broadcasted, judge whether opposite equip. is PLC device；
Wherein, first network is non-PLC network；If so, carrying out code key certification with opposite equip., authenticate by then establishing power line communications link with opposite equip..
In a kind of possible design, code key certification is carried out with opposite equip., comprising: it is random to generate dynamic code key TK, the dynamic code key TK is encrypted based on the first preset main code key MK；
Certification code key is generated according to the dynamic code key TK, dynamic code key TK and certification code key after broadcast enciphering, so that opposite equip. is decrypted the certification code key according to the encrypted dynamic code key TK.
In a kind of possible design, certification code key is generated according to dynamic code key TK, comprising: encrypt based on attribute information of the dynamic code key TK to PLC device, obtain certification code key.
In a kind of possible design, certification code key is generated according to dynamic code key TK, comprising: encrypt based on network cipher NPW of the dynamic code key TK to the PLC network of equipment, obtain certification code key.
In a kind of possible design, the attribute information of PLC device includes: the device password DPW of PLC device, and/or, the MAC Address of PLC device.
In a kind of possible design, certification passes through, comprising: if opposite equip. it is preset the second main code key MK it is identical as the first main code key MK, opposite equip. gets authentication information to certification code key decryption, determines that certification passes through.
In a kind of possible design, according to the first network message that opposite equip. is broadcasted, judge whether opposite equip. is PLC device, comprising: the message on detection first network, if comprising identifying the field that opposite equip. is PLC device in message, it is determined that opposite equip. is PLC device.
In a kind of possible design, first network includes: WiFi network, blueteeth network or wired broadband network.
In a kind of possible design, first network includes WiFi network；
Correspondingly, first network message includes: in the custom field of WiFi message include power line communication identification information.
In a kind of possible design, if PLC device is the equipment for not establishing power line communications link with any PLC device, this method further include: broadcast first network message on the first network.
In a kind of possible design, on the first network after broadcast first network message, further includes: receive the code key authentication information of opposite equip. broadcast；
Code key certification is carried out according to code key authentication information and opposite equip., certification is by then establishing power line communications link with to standby.
In a kind of possible design, code key authentication information includes: that opposite equip. encrypts the dynamic code key TK generated at random according to the first preset main code key MK, the encrypted dynamic code key TK of generation, further includes: the certification code key generated according to dynamic code key TK；
Correspondingly, carrying out code key certification with opposite equip., comprising: be decrypted according to encrypted dynamic code key TK to certification code key, obtain authentication information.
In a kind of possible design, certification code key is decrypted according to encrypted dynamic code key TK, include: that encrypted dynamic code key TK is decrypted according to the second preset main code key MK, certification code key is decrypted according to the dynamic code key TK obtained after decryption；
If the second main code key MK is identical as the first main code key MK, authentication information is got after decryption, certification passes through.
In a kind of possible design, authentication information is got after decryption, comprising: the attribute information of opposite equip. is got after decryption, attribute information includes: the device password DPW of opposite equip., and/or, the MAC Address of opposite equip..
In a kind of possible design, if getting the MAC Address in the attribute information of opposite equip. including opposite equip. after decryption, after getting authentication information after then decrypting, further include: the MAC Address got after decryption is compared with the source MAC for identifying opposite equip. in code key authentication information, if consistent, confirm that certification passes through.
In a kind of possible design, authentication information is got after decryption, comprising: the network cipher NPW of opposite equip. is got after decryption.
In a kind of possible design, according to the first network message that opposite equip. is broadcasted, before judging whether opposite equip. is PLC device, further includes: determine on the plc network with the presence or absence of identical as the network identity NID of itself Opposite equip.；If it exists, then power line communications link is established with opposite equip.；
If it does not exist, then the first network message broadcasted according to opposite equip. is executed, the step of whether opposite equip. is PLC device judged.
In a kind of possible design, before opposite equip. progress code key certification, further includes: obtain the signal strength of the first network of opposite equip.；
If the signal strength of the first network of opposite equip. meets preset threshold, code key certification is carried out with opposite equip..
In a kind of possible design, it determines on the plc network with the presence or absence of after opposite equip. identical with the network identity NID of itself, further include: it determines and opposite equip. identical with the network identity NID of itself is not present on the plc network, then remove the history power line communications link record of PLC device on the plc network.
In a kind of possible design, after the history power line communications link record of removing PLC device on the plc network, further includes: send the request message for establishing power line communications link with opposite equip. on the plc network；
The response message for receiving request message of opposite equip. feedback is received, the power line communications link with opposite equip. is established.
In a kind of possible design, method further include: receive the request message for establishing power line communications link that opposite equip. is sent；
Open the waiting sign for waiting and establishing power line communications link with opposite equip.；
The triggering message for establishing power line communications link with opposite equip. of user's triggering is received, closes and waits sign:
The response message for receiving request message is sent, the power line communications link with opposite equip. is established.
In a kind of possible design, it determines on the plc network with the presence or absence of after opposite equip. identical with the network identity NID of itself, further include: it determines and opposite equip. identical with the network identity NID of itself is not present on the plc network, then according to the MAC Address of opposite equip., judge whether once to establish power line communications link with opposite equip., if so, sending the request message for establishing power line communications link with opposite equip.；
If it is not, the signal strength of opposite equip. is then detected whether in preset threshold range, if so, sending the request message for establishing power line communications link with opposite equip..
Second aspect, the embodiment of the present application provide a kind of power line communication PLC device, comprising:
Judgment module, the first network message for being broadcasted according to opposite equip. judge whether opposite equip. is PLC device；Wherein, first network is non-PLC network；
Authentication module, for carrying out code key certification with opposite equip. when judgment module judges that opposite equip. is PLC device；
Module is established, for establishing power line communications link with opposite equip. after authentication module confirmation certification passes through.
In a kind of possible design, authentication module, comprising:
Submodule is encrypted, for generating dynamic code key TK at random, the dynamic code key TK is encrypted based on the first preset main code key MK；Certification code key is generated according to the dynamic code key TK；
Sending submodule, for the dynamic code key TK and certification code key after broadcast enciphering, so that opposite equip. is decrypted certification code key according to encrypted dynamic code key TK.
In a kind of possible design, submodule is encrypted, specifically for the category based on dynamic code key TK to PLC device Property information encrypted, obtain certification code key.
In a kind of possible design, submodule is encrypted, specifically for encrypting based on network cipher NPW of the dynamic code key TK to the PLC network of equipment, obtains certification code key.
In a kind of possible design, the attribute information of PLC device includes:
The device password DPW of PLC device, and/or, the MAC Address of PLC device.
In a kind of possible design, authentication module is identical as the first main code key MK specifically for working as the second preset main code key MK of opposite equip., then after opposite equip. gets authentication information to certification code key decryption, determines that certification passes through.
In a kind of possible design, judgment module includes:
Detection sub-module, for detecting the message on first network；
Submodule is determined, for determining that opposite equip. is PLC device when detection module detects in message comprising identifying field of the opposite equip. for PLC device.
In a kind of possible design, first network includes: WiFi network, blueteeth network or wired broadband network.
In a kind of possible design, first network includes WiFi network；Correspondingly, first network message includes: in the custom field of WiFi message include power line communication identification information.
In a kind of possible design, if PLC device is the equipment for not establishing power line communications link with any PLC device, PLC device further include:
Broadcast module, for broadcasting first network message on the first network.
In a kind of possible design, PLC device further include:
Receiving module, for receiving the code key authentication information of opposite equip. broadcast；
Authentication module is also used to carry out code key certification according to code key authentication information and opposite equip..
In a kind of possible design, code key authentication information includes: that opposite equip. encrypts the dynamic code key TK generated at random according to the first preset main code key MK, the encrypted dynamic code key TK of generation, further includes: the certification code key generated according to dynamic code key TK；Correspondingly, authentication module, comprising:
Submodule is decrypted, for certification code key to be decrypted according to encrypted dynamic code key TK, obtains authentication information.
In a kind of possible design, submodule is decrypted, specifically for encrypted dynamic code key TK is decrypted according to the second preset main code key MK, certification code key is decrypted according to the dynamic code key TK obtained after decryption；When the second main code key MK is identical as the first main code key MK, then authentication information is got after decrypting, certification passes through.
In a kind of possible design, submodule is decrypted, specifically for getting the attribute information of opposite equip. after decryption, attribute information includes: the device password DPW of opposite equip., and/or, the MAC Address of opposite equip..
In a kind of possible design, the MAC Address including opposite equip. in the attribute information of opposite equip. is got after decryption submodule decryption, then authentication module further include:
Submodule is compared, for the MAC Address got after decryption to be compared with the source MAC for identifying opposite equip. in code key authentication information, if unanimously, confirming that certification passes through.
In a kind of possible design, submodule is decrypted, specifically for getting the network cipher NPW of opposite equip. after decryption.
In a kind of possible design, the PLC device further include:
Determining module whether there is opposite end identical with the network identity NID of itself for determining on the plc network Equipment；
Module is established, is also used to after determining module determines and there is opposite equip. identical with the network identity NID of itself on the plc network, establishes power line communications link with opposite equip.；
Judgment module is also used to determine on the plc network in determining module there is no after opposite equip. identical with the network identity NID of itself, executes the first network message broadcasted according to opposite equip., judge whether opposite equip. is PLC device.
In a kind of possible design, the PLC device further include:
Obtain module, the signal strength of the first network for obtaining opposite equip.；
Authentication module is also used to when the signal strength of the first network of opposite equip. meets preset threshold, carries out code key certification with opposite equip..
In a kind of possible design, the PLC device further include:
Module is removed, for determining that there is no after opposite equip. identical with the network identity NID of itself, remove the history power line communications link record of PLC device on the plc network on the plc network.
In a kind of possible design, the PLC device further include:
Sending module, for sending the request message for establishing power line communications link with opposite equip. on the plc network；
Receiving module receives the response message of request message for receive opposite equip. feedback, establishes and the power line communications link of opposite equip. so as to establish module.
In a kind of possible design, receiving module is also used to receive the request message for establishing power line communications link of opposite equip. transmission；Open the waiting sign for waiting and establishing power line communications link with opposite equip.；The triggering message for establishing power line communications link with opposite equip. of user's triggering is received, closes and waits sign；
Sending module is also used to send the response message for receiving request message, so as to establish the power line communications link of module foundation and opposite equip..
In a kind of possible design, judgment module, it is also used to determine on the plc network in determining module there is no after opposite equip. identical with the network identity NID of itself, according to the MAC Address of opposite equip., judges whether once to establish power line communications link with opposite equip.；If so, sending the request message for establishing power line communications link with opposite equip.；If it is not, the signal strength of opposite equip. is then detected whether in preset threshold range, if so, sending the request message for establishing power line communications link with opposite equip..
In a kind of possible design, PLC device includes at least one of following equipment: PLC device, the PLC device of integrated wireless network interface card, the PLC device of integrated wired network interface of integrated router.
It can be seen that, in the above various aspects, the connection method and PLC device of PLC device provided by the embodiments of the present application, pass through the message according to interaction between PLC device, confirmation is the identity of PLC device each other, and code key authentication information is interacted after confirming identity, and after success identity, the automatic connection realized between PLC device.Need to be confirmed by user which PLC device needs is attached in the prior art to solve, and the connection completed between PLC device is manually operated, joint efficiency is low, the technical issues of poor operability, realize the quick connection between PLC device, it ensure that the accuracy connected between PLC device, safety simultaneously, improve the efficiency that PLC device is successfully connected.In addition, a variety of code key authentication modes provided by the embodiment of the present application, can satisfy diversified connection requirement.Meanwhile the embodiment of the present application provides the scheme that PLC device connection is judged whether to according to network signal intensity, further ensures the accuracy connected between PLC device.
Detailed description of the invention
Fig. 1 is the network environment schematic diagram of the connection method of PLC device provided by the present application；
Fig. 2 is the flow diagram of the connection method for the PLC device that one embodiment of the application provides；
Fig. 3 is the flow diagram of the connection method for the PLC device that another embodiment of the application provides；
Fig. 4 is the frame structure schematic diagram of WiFi message in embodiment illustrated in fig. 3；
Fig. 5 is the standard agreement process that PLC device connects on the plc network in embodiment illustrated in fig. 3；
Fig. 6 is the flow diagram of the connection method for the PLC device that another embodiment of the application provides；
The interaction flow schematic diagram that Fig. 7 is Fig. 3, the PLC device of embodiment illustrated in fig. 6 connects；
Fig. 8 is the structural schematic diagram for the PLC device that one embodiment of the application provides；
Fig. 9 is the structural schematic diagram for the PLC device that another embodiment of the application provides.
Specific embodiment
The network environment of the application is introduced first, as shown in Figure 1, PLC device 1 (Homeplug) in application scheme can be arranged in multiple rooms with compartment, PLC device 1 is inserted on the outlet of power line 2, carries out the transmission of network data between each PLC device 1 by power line 2.The access terminals equipment 3 of user, such as computer, PAD, mobile phone can receive the power line network data that PLC device 1 is transmitted by cable 4 or wireless network card 5, wherein, PLC device 1 is integrated with following at least one function, router 6 is integrated in PLC device 1, it is integrated with wired network interface in PLC device 1, wireless network card 5 is integrated in PLC device, is able to carry out wired or wireless WiFi communication.
Fig. 2 is the flow diagram of the connection method for the PLC device that one embodiment of the application provides, as shown in Fig. 2, the present embodiment provides a kind of connection methods of PLC device, comprising:
The first network message that step 201, PLC device are broadcasted according to opposite equip. judges whether opposite equip. is PLC device.
In this step, after PLC device powers on, start to detect the message on first network, for example, beacon beacon is detected, wherein, the first network is non-PLC network, for example, can realize the connection of power line network by WiFi network, blueteeth network etc..So that PLC device can not only be connected by power line, it can also be connected to the network by other, reach the quick connection of multipath.If PLC device detects the message of first network, can then judge whether the equipment for issuing the message is PLC device according to the information in message, it then selects to be attached with it if PLC device, if not PLC device does not respond the message, to targetedly quickly navigate to target PLC device.
Step 202, opposite equip. are PLC devices, then carry out code key certification with opposite equip., are authenticated by establishing power line communications link with opposite equip..
In this step, if it is PLC device that identification, which obtains opposite equip., it is also necessary to the identity of opposite equip. is verified, it specifically can be by carrying out code key certification with opposite equip., so that the opposite equip. passed through with certification establishes plc communication link.The room of example multicompartmented as shown in figure 1, if being authenticated without code key, it is more likely that can with one wall of neighbour's every PLC device establish a connection, therefore, it is necessary to authenticate by code key, guarantee the safety that PLC network connects.
By above-mentioned two step, realize PLC device automatic identification broadcasting packet, determine opposite end be PLC device after from It is dynamic to send authentication information, the quick connection to establish a connection automatically after certification is completed, to solve the cumbersome connection procedure for needing user to be manually entered the identification information of opposite end PLC device in the prior art.
The connection method of PLC device provided in this embodiment judges whether opposite equip. is PLC device by the first network message broadcasted according to opposite equip.；Wherein, first network is non-PLC network；If so, carrying out code key certification with opposite equip., authenticate by then establishing power line communications link with opposite equip..To realize between PLC device through message interaction, confirms identity and be automatically performed code key certification, be manually operated without user, quickly establish the connection of PLC device automatically, improve the efficiency of PLC device connection.
Fig. 3 is the flow diagram of the connection method for the PLC device that another embodiment of the application provides, as shown in figure 3, on the basis of the above embodiments, the present embodiment provides a kind of connection methods of PLC device, comprising:
Message in step 301, detection first network, if comprising identifying the field that opposite equip. is PLC device in message, it is determined that opposite equip. is PLC device.Wherein, first network can be WiFi network, blueteeth network or wired broadband network.If first network is WiFi network；The identification information for power line communication that then to may include: in the custom field of WiFi message in first network message include.As shown in figure 4, the identification information of device=PLC is added in the customized frame of the Frame body of wifi message, so as to detect that the PLC device of the message can quickly recognize other PLC devices and request to establish connection.
Step 302, random generation dynamic code key TK, encrypt dynamic code key TK based on the first preset main code key MK.
Main code key is production code key (Manufacture Key, MK), is usually the code key being preset at before PLC device factory by producer in PLC device.In general, the PLC device MK having the same of identical MK or the factory of same manufacturer be may have with the PLC device of model.Therefore, it is unsafe for carrying out the identification of PLC device only according to MK.Because neighbour's is likely to possess the PLC device with oneself same brand, then two MK are likely to identical.Therefore, it is also desirable to carry the further authentication information in step 303.Wherein, dynamic code key (Traffic Key, TK), the interim code key being randomly generated encrypt TK using preset MK, and encrypted TK are sent to opposite equip..
Step 303 generates certification code key according to dynamic code key TK, dynamic code key TK and certification code key after broadcast enciphering, so that opposite equip. is decrypted demonstrate,proved code key according to the encrypted dynamic code key TK.
In this step, generating certification code key according to dynamic code key TK may include following two mode, and 1) it is encrypted based on attribute information of the dynamic code key TK to PLC device, obtain certification code key.The attribute information of the PLC device may include: the device password (Device Password, DPW) of PLC device, that is, the information that user inputs in user interface in the prior art, and/or, the MAC Address of PLC device.2) network cipher (Network Password, NPW) of the PLC network of equipment, that is, the information that user inputs in user interface in the prior art are encrypted based on dynamic code key TK, obtains certification code key.
That is after generating TK at random, TK is encrypted using preset MK, obtains certification code key using TK encryption DPW and/or MAC；Or certification code key is obtained using TK encryption NPW.Authentication information in step 302 and step 303 can pass through Probe request IE field: device=PLC, type=TK, content=MK (TK)；Device=PLC, type=DPW, content=TK (NewSTA_DPW+MAC)；Device=PLC, type=NPW, content=TK (NPW), are sent to the PLC device of opposite end.In general, after each PLC device powers on, it is based on security consideration, the duration of certification code key multicast controls within the scope of preset duration, for example, the transmission duration of above-mentioned code key authentication information controlled in 2 minutes.
Step 304, certification are by establishing power line communications link with opposite equip. afterwards.
For the PLC device that can be established a connection, all be provided with identical main code key MK inside it in advance, if that is the second preset main code key MK of opposite equip. is identical as the first main code key MK of the PLC device of broadcast authentication key information, opposite equip. can be decrypted correctly to get authentication information with its second main secret key pair certification code key.For example, opposite equip. decrypt to obtain using oneself the second main code key MK device password DPW in step 303, the MAC Address of PLC device, PLC device the authentication informations such as network cipher NPW, then can determine that certification passes through.Next, two PLC devices can be by PLC standard agreement process (as shown in Figure 5, wherein PLC-A and PLC-B represents two PLC devices after code key certification passes through, the standard agreement process is the prior art, and this will not be repeated here) realize that the plc communication of two equipment links.If the second main code key MK can not successful decryption go out TK, also can not decrypt the information such as DPW, MAC, NPW naturally, therefore, authenticate it is unsuccessful, two PLC devices cannot achieve connection.
Further, since MK is factory code key preset when dispatching from the factory, accordingly, there exist neighbour's to have the case where identical MK with oneself PLC device, therefore, can obtain the signal strength of the first network of opposite equip. before sending code key authentication information；If the signal strength of the first network of opposite equip. meets preset threshold, code key certification is carried out with opposite equip..To further guarantee the safety of PLC device link, operation only is attached to the PLC device in preset range.Wherein, the preset threshold of the signal strength can be according to the performance sets itself of PLC product, for example, -45dBm.
Fig. 6 is the flow diagram of the connection method for the PLC device that another embodiment of the application provides, as shown in fig. 6, on the basis of the above embodiments, the present embodiment provides a kind of connection methods of PLC device, comprising:
Step 601 broadcasts first network message on the first network.
In this step, it is the equipment for not establishing power line communications link with any PLC device for PLC device, that is, the PLC device may be the equipment for accessing PLC network for the first time, it is also likely to be also not establish the equipment that PLC is linked with other PLC devices, it it could also be because unstable networks and be disconnected the equipment linked with other PLC devices, then the PLC device can be broadcast periodically first network message on the first network, so that other PLC devices of monitor channel receive the first network message of the not-connected status of oneself, know the information for thering is the request of other PLC devices to establish connection in channel.
Step 602, the code key authentication information for receiving opposite equip. broadcast.
In this step, code key authentication information may include: that opposite equip. encrypts the dynamic code key TK generated at random according to the first preset main code key MK, the encrypted dynamic code key TK of generation；The certification code key generated according to dynamic code key TK.
Step 603 carries out code key certification according to code key authentication information and opposite equip..
In this step, it needs that certification code key is decrypted according to the encrypted dynamic code key TK received, to obtain authentication information.And encrypted dynamic code key TK is decrypted certification code key according to the dynamic code key TK obtained after decryption firstly the need of encrypted dynamic code key TK is decrypted according to the second preset main code key MK；If the second main code key MK is identical as the first main code key MK, authentication information can be got after decryption, confirmation certification passes through.For the PLC device that can be connected, all be provided with identical main code key MK inside it in advance, if that is the second preset main code key MK of opposite equip. is identical as the first main code key MK of the PLC device of broadcast authentication key information, opposite equip. can get authentication information with its second main secret key pair certification code key decryption.For example, successful decryption goes out the device password DPW of the PLC device in previous embodiment in step 303, PLC device The authentication informations such as network cipher NPW of MAC Address, PLC device, after getting these information, can determine that certification passes through.Next, two PLC devices can realize that the plc communication of two equipment is linked by PLC standard agreement process shown in fig. 5.
Wherein, authentication information may include: the attribute information of the opposite equip. got after decrypting, which includes: the device password DPW of opposite equip., and/or, the MAC Address of opposite equip..If getting the MAC Address in the attribute information of opposite equip. including opposite equip. after decryption, the MAC Address got after decryption is compared with the source MAC for identifying opposite equip. in the code key authentication information, if unanimously, confirming that certification passes through.
Authentication information can also include: the network cipher NPW of the opposite equip. got after decrypting.
Step 604, certification are by establishing power line communications link with opposite equip. afterwards.
The interaction flow schematic diagram that Fig. 7 is Fig. 3, the PLC device of embodiment illustrated in fig. 6 connects, as shown in fig. 7, the first network message in the embodiment is illustrated by taking WiFi message as an example.
On the basis of the above embodiments, optionally, in the first network message that PLC device is broadcasted according to opposite equip., before judging whether opposite equip. is PLC device, the step of can also including: step 701, determining on the plc network with the presence or absence of network identity (Network Identifier, NID) identical opposite equip. with itself；Wherein, NID is the network name that PLC device is formed on power line, and the NID of the PLC device of successful matching is identical.If it exists, power line communications link is established based on PLC standard agreement process shown in fig. 5 and opposite equip.；If it does not exist, step 702 is executed.
Step 702, the first network message for receiving opposite equip. PLC2 broadcast.
Step 703 judges whether opposite equip. PLC2 is PLC device.If judging, opposite equip. PLC2 is PLC device, and the first network signal strength for judging opposite equip. generates TK in threshold range at random, encrypts TK using preset MK, encrypts DPW and MAC using TK.(encrypting and transmitting can also be carried out to NPW using TK in this step)
Step 704 sends Probe request IE field, wherein carries the authentication information in step 703.Wherein, encrypted TK and encrypted DPW and MAC information can be sent in the same Probe request IE field, or be divided into the transmission of former and later two frames.
Step 705, PLC2 detect that PLC1 is PLC device, and its signal strength is within a preset range, then decrypt TK using preset MK, and TK decrypts DPW and MAC, and whether the MAC for judging that decryption obtains is equal with the MAC of PLC device.
It if obtained MAC is equal with the source address MAC of the frame is sent after decryption, can determine that the identity of PLC1 is correct, may be that other PLC devices are truncated to authentication information just in the transmission, transmission of assuming another's name if unequal.Therefore, by mac authentication, the safety of code key certification can be further assured that.
Step 706, successful decryption, and confirm that MAC is equal, then execute PLC standard agreement process (shown in Fig. 5).
Optionally, determining that there is no after opposite equip. identical with the network identity NID of itself, can also include: to remove the history power line communications link record of PLC device on the plc network on the plc network.The request message that power line communications link is established with opposite equip. is sent on the plc network.The response message for receiving request message of opposite equip. feedback is received, the power line communications link with opposite equip. is established.Since PLC network communication protocol defines, only with identical NID PLC device between can just carry out PLC network communication, therefore, for it is non-for the first time access network PLC device, inside may store before link history NID information, therefore, Before sending linking request, history power line communications link record can be removed, first to promote link efficiency.For above-mentioned steps, PLC device is to send and receive the message for establishing PLC link on the plc network, the process can concurrently or sequentially be carried out with being established the link in previous embodiment by first network, either parallel or serial execution, its purpose is provided to the link established between PLC device as early as possible, accelerates link rate.
Further, for the PLC device for the request message for establishing power line communications link for receiving opposite equip. transmission, after receiving the request message, the waiting sign for waiting and establishing power line communications link with opposite equip. is opened；The triggering message for establishing power line communications link with opposite equip. of user's triggering is received, closes and waits sign；The response message for receiving request message is sent, the power line communications link with opposite equip. is established.Usually, the waiting sign can be by being arranged indicator light in PLC device, after PLC device receives request message, indicator light is lit, the wait state that prompt user is currently in waiting and opposite equip. is attached, key is also provided in PLC device, so that user's pressing keys, as the triggering message for receiving to establish power line communications link with opposite equip., PLC device, which receives to close after the triggering message of user's pressing keys, waits sign, i.e. indicator light is closed, and response message is sent to opposite equip., so that two PLC devices establish PLC link.
Optionally, determining that there is no after opposite equip. identical with the network identity NID of itself on the plc network, it can also comprise determining that there is no opposite equip.s identical with the network identity NID of itself on the plc network, then according to the MAC Address of opposite equip., judge whether once to establish power line communications link with opposite equip., if so, sending the request message for establishing power line communications link with opposite equip.；If it is not, the signal strength of opposite equip. is then detected whether in preset threshold range, if so, sending the request message for establishing power line communications link with opposite equip..Judged by the MAC Address to the PLC device for once having linking relationship, the step of judging its signal strength can be removed from, to accelerate to link rate.The step can also concurrently or sequentially be carried out with being established the link in previous embodiment by first network, and either parallel or serial execution, purpose is also provided to the link established between PLC device as early as possible, accelerate link rate.
Fig. 8 is the structural schematic diagram for the PLC device that one embodiment of the application provides, as shown in figure 8, the power line communication PLC device, comprising: judgment module 81, the first network message for being broadcasted according to opposite equip. judge whether opposite equip. is PLC device；Wherein, first network is non-PLC network；Authentication module 82, for carrying out code key certification with opposite equip. when judgment module 81 judges that opposite equip. is PLC device；Module 83 is established, for establishing power line communications link with opposite equip. after the confirmation certification of authentication module 82 passes through.
Power line communication PLC device provided in this embodiment judges whether opposite equip. is PLC device by the first network message broadcasted according to opposite equip.；Wherein, first network is non-PLC network；If so, carrying out code key certification with opposite equip., authenticate by then establishing power line communications link with opposite equip..To realize between PLC device through message interaction, confirms identity and be automatically performed code key certification, be manually operated without user, quickly establish the connection of PLC device automatically, improve the efficiency of PLC device connection.
Fig. 9 is the structural schematic diagram for the PLC device that another embodiment of the application provides, as shown in figure 9, on the basis of a upper embodiment, authentication module 82, include: encryption submodule 821, for generating dynamic code key TK at random, dynamic code key TK is encrypted based on the first preset main code key MK；Certification code key is generated according to dynamic code key TK；Sending submodule 822, for the dynamic code key TK and certification code key after broadcast enciphering, so that opposite equip. is decrypted certification code key according to encrypted dynamic code key TK.
Optionally, submodule 821 is encrypted, specifically for encrypting based on attribute information of the dynamic code key TK to PLC device, obtains certification code key.
Optionally, submodule 821 is encrypted, specifically for encrypting based on network cipher NPW of the dynamic code key TK to the PLC network of equipment, obtains certification code key.
Optionally, the attribute information of PLC device includes: the device password DPW of PLC device, and/or, the MAC Address of PLC device.
Optionally, authentication module 82, it is identical as the first main code key MK specifically for working as the second preset main code key MK of opposite equip., then after opposite equip. gets authentication information to certification code key decryption, determine that certification passes through.
Optionally, judgment module 81 includes: detection sub-module 811, for detecting the message on first network；Submodule 812 is determined, for determining that opposite equip. is PLC device when detection module detects in message comprising identifying field of the opposite equip. for PLC device.
Optionally, first network includes: WiFi network, blueteeth network or wired broadband network.
Optionally, first network includes WiFi network；Correspondingly, first network message includes: in the custom field of WiFi message include power line communication identification information.
Optionally, if PLC device is the equipment for not establishing power line communications link with any PLC device, PLC device further include: broadcast module 84, for broadcasting first network message on the first network.
Optionally, PLC device further include: receiving module 85, for receiving the code key authentication information of opposite equip. broadcast；Authentication module 82 is also used to carry out code key certification according to code key authentication information and opposite equip..
Optionally, code key authentication information includes: that opposite equip. encrypts the dynamic code key TK generated at random according to the first preset main code key MK, the encrypted dynamic code key TK of generation, further includes: the certification code key generated according to dynamic code key TK；Correspondingly, authentication module 82, comprising:
Submodule 823 is decrypted, for the certification code key to be decrypted according to encrypted dynamic code key TK, obtains authentication information.
Optionally, submodule 823 is decrypted, specifically for encrypted dynamic code key TK is decrypted according to the second preset main code key MK, certification code key is decrypted according to the dynamic code key TK obtained after decryption；When the second main code key MK is identical as the first main code key MK, then authentication information is got after decrypting, certification passes through.
Optionally, submodule 823 is decrypted, specifically for getting the attribute information of opposite equip. after decryption, attribute information includes: the device password DPW of opposite equip., and/or, the MAC Address of opposite equip..
Optionally, decryption submodule 823 gets the MAC Address including opposite equip. in the attribute information of opposite equip. after decrypting, then authentication module 82 further include:
Submodule 824 is compared, for the MAC Address got after decryption to be compared with the source MAC for identifying opposite equip. in code key authentication information, if unanimously, confirming that certification passes through.
Optionally, submodule 823 is decrypted, specifically for getting the network cipher NPW of opposite equip. after decryption.
Optionally, further includes: determining module 86 whether there is opposite equip. identical with the network identity NID of itself for determining on the plc network；Module 83 is established, is also used to after determining module 86 determines and there is opposite equip. identical with the network identity NID of itself on the plc network, establishes power line communications link with opposite equip.；Judgment module 81 is also used to determine on the plc network in determining module 86 there is no after opposite equip. identical with the network identity NID of itself, executes the first network message broadcasted according to opposite equip., judge whether opposite equip. is PLC device.
Optionally, further includes: obtain module 87, the signal strength of the first network for obtaining opposite equip.；Authentication module 82 is also used to when the signal strength of the first network of opposite equip. meets preset threshold, with opposite equip. Carry out code key certification.
Optionally, further includes: module 88 is removed, for determining that there is no after opposite equip. identical with the network identity NID of itself, remove the history power line communications link record of PLC device on the plc network on the plc network.
Optionally, further includes: sending module 89, for sending the request message for establishing power line communications link with opposite equip. on the plc network；Receiving module 810 receives the response message of request message for receive opposite equip. feedback, establishes and the power line communications link of opposite equip. so as to establish module 83.
Optionally, receiving module 810 are also used to receive the request message for establishing power line communications link of opposite equip. transmission；Open the waiting sign for waiting and establishing power line communications link with opposite equip.；The triggering message for establishing power line communications link with opposite equip. of user's triggering is received, closes and waits sign；Sending module 89 is also used to send the response message for receiving request message, so as to establish the power line communications link of module foundation and opposite equip..
Optionally, judgment module 81 are also used to determine on the plc network in determining module there is no after opposite equip. identical with the network identity NID of itself, according to the MAC Address of opposite equip., judge whether once to establish power line communications link with opposite equip.；If so, sending the request message for establishing power line communications link with opposite equip.；If it is not, the signal strength of opposite equip. is then detected whether in preset threshold range, if so, sending the request message for establishing power line communications link with opposite equip..
Optionally, PLC device includes at least one of following equipment: PLC device, the PLC device of integrated wireless network interface card, the PLC device of integrated wired network interface of integrated router.
Finally, it should be noted that above embodiments are only to illustrate the technical solution of the application, rather than its limitations；Although the application is described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: it is still possible to modify the technical solutions described in the foregoing embodiments or equivalent replacement of some of the technical features；And these are modified or replaceed, the spirit and scope of each embodiment technical solution of the application that it does not separate the essence of the corresponding technical solution.

Claims (45)

  1. A kind of connection method of PLC device characterized by comprising
    According to the first network message that opposite equip. is broadcasted, judge whether the opposite equip. is PLC device；Wherein, the first network is non-PLC network；
    If so, carrying out code key certification with the opposite equip., authenticate by then establishing power line communications link with the opposite equip..
  2. The method according to claim 1, wherein described carry out code key certification with the opposite equip., comprising:
    It is random to generate dynamic code key TK, the dynamic code key TK is encrypted based on the first preset main code key MK；
    Certification code key is generated according to the dynamic code key TK, dynamic code key TK and certification code key after broadcast enciphering, so that opposite equip. is decrypted the certification code key according to the encrypted dynamic code key TK.
  3. According to the method described in claim 2, it is characterized in that, described generate certification code key according to the dynamic code key TK, comprising:
    The attribute information of PLC device is encrypted based on the dynamic code key TK, obtains certification code key.
  4. According to the method described in claim 2, it is characterized in that, described generate certification code key according to the dynamic code key TK, comprising:
    It is encrypted based on network cipher NPW of the dynamic code key TK to the PLC network of equipment, obtains certification code key.
  5. According to the method described in claim 3, it is characterized in that, the attribute information of the PLC device includes:
    The device password DPW of the PLC device, and/or, the MAC Address of the PLC device.
  6. According to the described in any item methods of claim 2~5, which is characterized in that the certification passes through, comprising:
    If the second preset main code key MK of the opposite equip. is identical as the described first main code key MK, the opposite equip. gets authentication information to certification code key decryption, determines that certification passes through.
  7. The method according to claim 1, wherein the first network message broadcasted according to opposite equip., judges whether the opposite equip. is PLC device, comprising:
    The message on first network is detected, if comprising identifying the field that opposite equip. is PLC device in message, it is determined that the opposite equip. is PLC device.
  8. The method according to the description of claim 7 is characterized in that the first network includes: WiFi network, blueteeth network or wired broadband network.
  9. According to the method described in claim 8, it is characterized in that, the first network includes WiFi network；Correspondingly, the first network message includes: in the custom field of WiFi message include the power line communication identification information.
  10. The method according to claim 1, wherein if the PLC device is the equipment for not establishing power line communications link with any PLC device, the method also includes:
    The first network message is broadcasted on the first network.
  11. According to the method described in claim 10, it is characterized in that, it is described broadcast the first network message on the first network after, further includes:
    Receive the code key authentication information of opposite equip. broadcast；
    Carry out code key certification according to the code key authentication information and the opposite equip., certification by then with the opposite end Equipment establishes power line communications link.
  12. According to the method for claim 11, it is characterized in that, the code key authentication information includes: that opposite equip. encrypts the dynamic code key TK generated at random according to the first preset main code key MK, the encrypted dynamic code key TK generated, further includes: the certification code key generated according to the dynamic code key TK；Correspondingly, described carry out code key certification with the opposite equip., comprising:
    The certification code key is decrypted according to the encrypted dynamic code key TK, obtains authentication information.
  13. According to the method described in claim 12, which is characterized in that described that the certification code key is decrypted according to the encrypted dynamic code key TK, comprising:
    The encrypted dynamic code key TK is decrypted according to the second preset main code key MK, the certification code key is decrypted according to the dynamic code key TK obtained after decryption；
    If the second main code key MK is identical as the described first main code key MK, the authentication information is got after decryption, certification passes through.
  14. According to the method for claim 13, which is characterized in that get authentication information after the decryption, comprising:
    The attribute information of opposite equip. is got after decryption, the attribute information includes: the device password DPW of opposite equip., and/or, the MAC Address of opposite equip..
  15. According to the method for claim 14, which is characterized in that if got after decryption include in the attribute information of opposite equip. the opposite equip. MAC Address, after getting authentication information after the decryption, further includes:
    The MAC Address got after decryption is compared with the source MAC for identifying opposite equip. in the code key authentication information, if unanimously, confirming that certification passes through.
  16. According to the method for claim 13, which is characterized in that get authentication information after the decryption, comprising:
    The network cipher NPW of opposite equip. is got after decryption.
  17. The method according to claim 1, wherein the first network message broadcasted according to opposite equip., before judging whether the opposite equip. is PLC device, further includes:
    It determines and whether there is opposite equip. identical with the network identity NID of itself on the plc network；
    If it exists, then power line communications link is established with the opposite equip.；
    If it does not exist, then the first network message broadcasted according to opposite equip. is executed, the step of whether opposite equip. is PLC device judged.
  18. The method according to claim 1, wherein before the progress code key certification with the opposite equip., further includes:
    Obtain the signal strength of the first network of the opposite equip.；
    If the signal strength of the first network of the opposite equip. meets preset threshold, code key certification is carried out with the opposite equip..
  19. According to the method for claim 17, which is characterized in that the determination whether there is on the plc network after opposite equip. identical with the network identity NID of itself, further includes:
    It determines and opposite equip. identical with the network identity NID of itself is not present on the plc network, then remove the history power line communications link record of the PLC device on the plc network.
  20. According to the method for claim 19, which is characterized in that after the history power line communications link record of the removing PLC device on the plc network, further includes:
    The request message that power line communications link is established with opposite equip. is sent on the plc network；
    The response message for receiving the receiving request message of the opposite equip. feedback, establishes the power line communications link with the opposite equip..
  21. According to the method for claim 20, which is characterized in that the method also includes:
    Receive the request message for establishing power line communications link that opposite equip. is sent；
    Open the waiting sign for waiting and establishing power line communications link with the opposite equip.；
    The triggering message that power line communications link is established with opposite equip. for receiving user's triggering, closes the waiting sign；
    The response message for receiving the request message is sent, the power line communications link with the opposite equip. is established.
  22. According to the method for claim 17, which is characterized in that the determination whether there is on the plc network after opposite equip. identical with the network identity NID of itself, further includes:
    It determines and opposite equip. identical with the network identity NID of itself is not present on the plc network, then according to the MAC Address of the opposite equip., judge whether once to establish power line communications link with the opposite equip., if so, sending the request message for establishing power line communications link with the opposite equip.；If it is not, the signal strength of the opposite equip. is then detected whether in preset threshold range, if so, sending the request message for establishing power line communications link with the opposite equip..
  23. A kind of power line communication PLC device characterized by comprising
    Judgment module, the first network message for being broadcasted according to opposite equip. judge whether the opposite equip. is PLC device；Wherein, the first network is non-PLC network；
    Authentication module, for carrying out code key certification with the opposite equip. when the judgment module judges that the opposite equip. is PLC device；
    Module is established, for establishing power line communications link with the opposite equip. after authentication module confirmation certification passes through.
  24. PLC device according to claim 23, which is characterized in that the authentication module, comprising:
    Submodule is encrypted, for generating dynamic code key TK at random, the dynamic code key TK is encrypted based on the first preset main code key MK；Certification code key is generated according to the dynamic code key TK；
    Sending submodule, for the dynamic code key TK and certification code key after broadcast enciphering, so that opposite equip. is decrypted the certification code key according to the encrypted dynamic code key TK.
  25. PLC device according to claim 24, which is characterized in that
    The encryption submodule obtains certification code key specifically for encrypting based on the dynamic code key TK to the attribute information of PLC device.
  26. PLC device according to claim 24, which is characterized in that
    The encryption submodule obtains certification code key specifically for encrypting based on network cipher NPW of the dynamic code key TK to the PLC network of equipment.
  27. PLC device according to claim 25, which is characterized in that the attribute information of the PLC device includes:
    The device password DPW of the PLC device, and/or, the MAC Address of the PLC device.
  28. According to the described in any item PLC devices of claim 24~27, which is characterized in that
    The authentication module, it is identical as the described first main code key MK specifically for working as the second preset main code key MK of the opposite equip., then after the opposite equip. gets authentication information to certification code key decryption, determine that certification passes through.
  29. PLC device according to claim 23, which is characterized in that the judgment module includes:
    Detection sub-module, for detecting the message on first network；
    Submodule is determined, for determining that the opposite equip. is PLC device when detection module detects in message comprising identifying field of the opposite equip. for PLC device.
  30. PLC device according to claim 29, which is characterized in that the first network includes: WiFi network, blueteeth network or wired broadband network.
  31. PLC device according to claim 30, which is characterized in that the first network includes WiFi network；Correspondingly, the first network message includes: in the custom field of WiFi message include the power line communication identification information.
  32. PLC device according to claim 23, which is characterized in that if the PLC device is the equipment for not establishing power line communications link with any PLC device, the PLC device further include:
    Broadcast module, for broadcasting the first network message on the first network.
  33. PLC device according to claim 32, which is characterized in that the PLC device further include:
    Receiving module, for receiving the code key authentication information of opposite equip. broadcast；
    The authentication module is also used to carry out code key certification according to the code key authentication information and the opposite equip..
  34. PLC device according to claim 33, it is characterized in that, the code key authentication information includes: that opposite equip. encrypts the dynamic code key TK generated at random according to the first preset main code key MK, the encrypted dynamic code key TK generated, further includes: the certification code key generated according to the dynamic code key TK；Correspondingly, the authentication module, comprising:
    Submodule is decrypted, for the certification code key to be decrypted according to the encrypted dynamic code key TK, obtains authentication information.
  35. According to the PLC device described in claim 34, which is characterized in that
    The decryption submodule is decrypted the certification code key according to the dynamic code key TK obtained after decryption specifically for the encrypted dynamic code key TK is decrypted according to the second preset main code key MK；When the described second main code key MK is identical as the described first main code key MK, then the authentication information is got after decrypting, certification passes through.
  36. PLC device according to claim 35, which is characterized in that
    The decryption submodule, specifically for getting the attribute information of opposite equip. after decryption, the attribute information includes: the device password DPW of opposite equip., and/or, the MAC Address of opposite equip..
  37. PLC device according to claim 36, which is characterized in that the MAC Address including the opposite equip. in the attribute information of opposite equip. is got after the decryption submodule decryption, then the authentication module further include:
    Submodule is compared, for the MAC Address got after decryption to be compared with the source MAC for identifying opposite equip. in the code key authentication information, if unanimously, confirming that certification passes through.
  38. PLC device according to claim 35, which is characterized in that
    The decryption submodule, specifically for getting the network cipher NPW of opposite equip. after decryption.
  39. PLC device according to claim 23, which is characterized in that further include:
    Determining module whether there is opposite equip. identical with the network identity NID of itself for determining on the plc network；
    It is described to establish module, it is also used to after the determining module determines and there is opposite equip. identical with the network identity NID of itself on the plc network, establishes power line communications link with the opposite equip.；
    The judgment module is also used to determine on the plc network in the determining module there is no after opposite equip. identical with the network identity NID of itself, executes the first network message broadcasted according to opposite equip., judge whether the opposite equip. is PLC device.
  40. PLC device according to claim 23, which is characterized in that further include:
    Obtain module, the signal strength of the first network for obtaining the opposite equip.；
    The authentication module is also used to when the signal strength of the first network of the opposite equip. meets preset threshold, carries out code key certification with the opposite equip..
  41. PLC device according to claim 39, which is characterized in that further include:
    Module is removed, for determining that there is no after opposite equip. identical with the network identity NID of itself, remove the history power line communications link record of the PLC device on the plc network on the plc network.
  42. PLC device according to claim 41, which is characterized in that further include:
    Sending module, for sending the request message for establishing power line communications link with opposite equip. on the plc network；
    Receiving module, the response message of the receiving request message for receiving the opposite equip. feedback, so that the power line communications link for establishing module foundation and the opposite equip..
  43. PLC device according to claim 43, which is characterized in that
    The receiving module is also used to receive the request message for establishing power line communications link of opposite equip. transmission；Open the waiting sign for waiting and establishing power line communications link with the opposite equip.；The triggering message that power line communications link is established with opposite equip. for receiving user's triggering, closes the waiting sign；
    The sending module is also used to send the response message for receiving the request message, so that the power line communications link for establishing module foundation and the opposite equip..
  44. PLC device according to claim 39, which is characterized in that
    The judgment module is also used to determine on the plc network in the determining module there is no after opposite equip. identical with the network identity NID of itself, according to the MAC Address of the opposite equip., judges whether once to establish power line communications link with the opposite equip.；If so, sending the request message for establishing power line communications link with the opposite equip.；If it is not, the signal strength of the opposite equip. is then detected whether in preset threshold range, if so, sending the request message for establishing power line communications link with the opposite equip..
  45. PLC device according to claim 23, which is characterized in that the PLC device includes at least one of following equipment: PLC device, the PLC device of integrated wireless network interface card, the PLC device of integrated wired network interface of integrated router.
CN201780048201.0A 2017-03-03 2017-06-09 The connection method and PLC device of PLC device Pending CN109565298A (en)

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Application publication date: 20190402

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