CN109818791B - KNX wireless communication method and system based on LoRa physical layer - Google Patents
KNX wireless communication method and system based on LoRa physical layer Download PDFInfo
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Abstract
The invention discloses a KNX wireless communication method and a system thereof based on a LoRa physical layer, wherein the method comprises the following steps: s1, redesigning the KNX-RF link layers of the terminal node protocol layer and the KNX-RF gateway protocol layer respectively, reserving necessary information in standard KNX-RF, and performing permutation and combination suitable for LoRa communication transmission again to form a new KNX-RF link layer; s2, then loading the new KNX-RF link layer in S1 into a payload PHYPay load of a LoRa physical layer to form a new terminal node protocol layer and a KNX-RF gateway protocol layer; and S3, respectively constructing a new terminal node and a KNX-RF gateway based on the new terminal node protocol layer and the KNX-RF gateway protocol layer in the S2, and forming a KNX wireless communication system based on the LoRa physical layer to realize KNX wireless communication. The system comprises terminal nodes and a KNX-RF gateway, wherein the plurality of terminal nodes are connected with the KNX-RF gateway through LoRa-RF communication to construct a star network and realize KNX wireless communication. The technical scheme can avoid the limitation of frequency bands and transmitting power on standard KNX wireless communication, and has small use limitation.
Description
Technical Field
The invention relates to the technical field of LoRa technology and KNX wireless communication, in particular to a KNX wireless communication method and a KNX wireless communication system based on a LoRa physical layer.
Background
In 5 months 1999, the European three bus protocols EIB, BatiBus and EHSA are combined to form the Konnex association, the KNX protocol is provided, the protocol provides a complete solution for home and building automation, the KNX is the only global residence and building control standard, and the KNX protocol product is widely used in domestic middle-high-end public building and intelligent home system projects due to high reliability, high flexibility, high expansibility, high quality and high consistency. The KNX transmission medium has three modes of TP (twisted pair), RF (radio frequency) and IP (Ethernet). The standard signal transmission bandwidth specified by the KNX RF protocol is 868MHz, the maximum transmission energy is 25mW, the operating frequency of 868 MHz-868.6 MHz is increased for micropower (short-distance) radio application by the chinese government in 2008, and the standard signal transmission bandwidth requires a transmission power limit value for the radio frequency of radio equipment: 5mW, so that the frequency and the transmitting power of the KNX RF communication are limited in China, and the KNX RF product cannot be popularized and applied in China. LoRa is a low power consumption local area network wireless standard, and currently, LoRa has 2 ISM (free) frequency bands in the chinese region: CN 779-787: maximum transmit power is only 10dBm (10 mW); CN 470-510: the maximum transmitting power can reach 17dBm (50mW), and the transmitting time is less than 5000 ms. It can be seen that the LoRa communication using CN470-510 frequency band fully meets the practical requirement. Compared with an FSK modulation mode adopted by KNX RF, LoRa has the advantages of long distance, low power consumption and strong anti-interference performance.
Prior art is as utility model discloses a KNX IP gateway of publication number CN208143237U, including loRa communication module, KNX IP agreement processing module, ethernet communication module, storage module, power module and status indication and control module, KNX IP agreement processing module links to each other with KNX IP agreement processing module and ethernet communication module respectively, and storage module links to each other with KNX IP agreement processing module, and power module is used for the power supply, and status indication and control module are used for instructing data communication's state and carrying out the control that the gateway programmed the setting. Through the scheme that adopts KNX IP agreement and loRa agreement to combine together, on the basis that satisfies KNX IP agreement standard, loRa wireless communication technique transmission distance is far away, the interference killing feature is strong, and need not the wiring, deploys in a flexible way. However, the wireless communication is limited by frequency band and transmitting power, and the existing ISM (free) frequency band cannot be used for communication, so that the application range has certain limitation.
Disclosure of Invention
The invention aims to provide a KNX wireless communication method and a KNX wireless communication system based on an LoRa physical layer, and aims to solve the problems that the wireless communication of the LoRa wireless communication technology in the prior art proposed in the background technology is limited by frequency ranges and transmitting power, the existing ISM (free) frequency ranges can not be used for communication, and the use range has certain limitation.
In order to achieve the purpose, the invention provides the following technical scheme:
a KNX wireless communication method based on a LoRa physical layer comprises the following steps:
s1, redesigning the KNX-RF link layers of the terminal node protocol layer and the KNX-RF gateway protocol layer respectively, reserving necessary information in standard KNX-RF, and performing permutation and combination suitable for LoRa communication transmission again to form a new KNX-RF link layer;
s2, loading the new KNX-RF link layer in S1 into a payload PHYPayload of a LoRa physical layer to form a new terminal node protocol layer and a KNX-RF gateway protocol layer;
s3, respectively constructing a new terminal node and a KNX-RF gateway based on the new terminal node protocol layer and the KNX-RF gateway protocol layer in the S2, and forming a KNX wireless communication system based on the LoRa physical layer to realize KNX wireless communication.
Preferably, the step S1 of retaining the necessary information in the standard KNX-RF includes retaining standard protocols of KNX application, transport, network layer and LoRa physical layer PHY.
Preferably, the rearrangement combination suitable for the LoRa communication transmission in S1 is to add a KNX-TP protocol universal part to the proprietary part information of the KNX-RF link layer, and to perform the rearrangement combination suitable for the LoRa communication transmission again.
A KNX wireless communication system based on a LoRa physical layer, comprising:
the terminal node comprises a node LoRa communication circuit, a node MCU, a peripheral interface, a node power supply circuit and a protocol layer, wherein the protocol layer comprises a node KNX application layer, a node KNX transmission layer, a node KNX network layer, a node LoRa physical layer PHY and a node KNX-RF link layer of a standard protocol; and a KNX-RF gateway, which comprises a KNX communication circuit, a gateway MCU, a gateway LoRa communication circuit, a gateway power supply circuit, a gateway KNX application layer of a standard protocol, a gateway KNX transmission layer, a gateway KNX network layer, a gateway LoRa physical layer PHY, a gateway KNX-RF link layer, a gateway KNX-TP link layer and a gateway TP physical layer PHY;
the node KNX-RF link layer and the gateway KNX-TP link layer increase permutation combination suitable for LoRa communication transmission on the basis of reserving KNX-RF necessary information and load the permutation combination into a payload PHYPayload of a LoRa physical layer;
and the terminal node is connected with the KNX-RF gateway through LoRa-RF communication.
Preferably, the node LoRa communication circuit is used as a communication medium and a physical layer PHY of the whole communication protocol to realize LoRa RF wireless communication; the node MCU realizes link, network, transmission, application and other protocol layers based on the LoRa physical layer PHY; the peripheral interface is connected with various sensors and actuators for collecting and outputting switching values; the node power supply circuit is used for supplying power to the terminal node.
Preferably, the KNX communication circuit is used for realizing a physical layer and a link layer of KNX-TP communication; the gateway MCU is used for completing the functions of a link, a network, a transmission protocol layer and the like based on the LoRa physical layer and the KNX-TP physical layer, a gateway route and the like; the gateway LoRa communication circuit is used as a communication medium and a physical layer (PHY) of the whole communication protocol to realize LoRa-RF wireless communication; the gateway power supply circuit is used for supplying power to the gateway.
Preferably, there are a plurality of the terminal nodes and the plurality of the KNX-RF gateways, and the plurality of terminal nodes and the plurality of the KNX-RF gateways constitute a star network structure.
Compared with the prior art, the invention has the beneficial effects that: according to the KNX wireless communication method and the system based on the LoRa physical layer, the communication can be carried out in ISM (free) frequency bands of various national regions by utilizing the LoRa, the limitation of the frequency bands and the transmitting power on the standard KNX RF wireless communication is avoided, the characteristic of long-distance low power consumption of the LoRa can be fully utilized, and the coverage range of the KNX wireless communication can be effectively expanded without relaying; for a large number of switch type acquisition terminal devices, the built-in battery can be used for supporting the work for years; in addition, when the KNX wireless product is used, new KNX equipment can be added without rewiring, and secondary transformation and upgrading are facilitated. With the widespread use of KNX in domestic middle-high-end public buildings and intelligent home system projects, the KNX wireless communication method based on the LoRa physical layer in the technical scheme has wide market application prospects and good economic value.
Drawings
Fig. 1 is a schematic flow chart of a KNX wireless communication method based on a LoRa physical layer according to the present invention;
fig. 2 is a KNX wireless communication system topology diagram based on the LoRa physical layer according to the present invention;
FIG. 3 is a schematic diagram of a KNX wireless communication protocol layer design according to the present invention;
FIG. 4 is a schematic diagram of a KNX-RF link layer design according to the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without making any creative effort based on the embodiments in the present invention, belong to the protection scope of the present invention.
As shown in fig. 1, a KNX wireless communication method based on a LoRa physical layer includes the following steps:
s1, redesigning the KNX-RF link layers of the terminal node protocol layer and the KNX-RF gateway protocol layer respectively, reserving necessary information in standard KNX-RF, and performing permutation and combination suitable for LoRa communication transmission again to form a new KNX-RF link layer.
KNX application, transmission and network layer in the terminal node and the KNX-RF gateway are standard protocols, a LoRa physical layer PHY is also a standard protocol and is mainly realized by a LoRa communication circuit and a corresponding MCU internal drive, the KNX application, transmission and network layer in the KNX-RF gateway is a standard protocol, the LoRa physical layer PHY is also a standard protocol, and only the KNX-RF link layer needs to be redesigned. The KNX-RF link layer is composed of a KNX-RF special part information of the characteristic length, the control word, the domain address (or the serial number) and the like, a KNX-Ctrl part and a KNX-TP protocol universal part, the KNX-RF link layer retains necessary information in standard KNX RF during design, such as standard protocols of a KNX application, transmission and network layer and a standard protocol of a LoRa physical layer PHY, and permutation and combination suitable for LoRa communication transmission are carried out again to form a new terminal node KNX-RF link layer and a KNX-RF gateway KNX-RF link layer respectively.
S2, and then loading the new KNX-RF link layer in S1 into a payload PHYPayload of a LoRa physical layer to form a new terminal node protocol layer and a KNX-RF gateway protocol layer.
And loading the new terminal node KNX-RF link layer and the KNX-RF gateway KNX-RF link layer into payloads PHYPayLOAD of LoRa physical layers of the terminal node and the KNX-RF gateway respectively to form a new terminal node protocol layer and a new KNX-RF gateway protocol layer.
S3, respectively constructing a new terminal node and a KNX-RF gateway based on the new terminal node protocol layer and the KNX-RF gateway protocol layer in the S2, and forming a KNX wireless communication system based on the LoRa physical layer to realize KNX wireless communication.
And respectively constructing a new terminal node and a KNX-RF gateway according to the new terminal node protocol layer and the KNX-RF gateway protocol layer, and forming a KNX wireless communication system based on the LoRa physical layer to realize KNX wireless communication.
As shown in fig. 2, the present invention also discloses a KNX wireless communication system based on the LoRa physical layer, which includes:
the terminal node comprises a node LoRa communication circuit, a node MCU, a peripheral interface, a node power supply circuit and a protocol layer, wherein the protocol layer comprises a node KNX application layer, a node KNX transmission layer, a node KNX network layer, a node LoRa physical layer PHY and a node KNX-RF link layer of a standard protocol; the KNX-RF gateway comprises a KNX communication circuit, a gateway MCU, a gateway LoRa communication circuit, a gateway power supply circuit, a gateway KNX application layer of a standard protocol, a gateway KNX transmission layer, a gateway KNX network layer, a gateway LoRa physical layer PHY, a gateway KNX-RF link layer, a gateway KNX-TP link layer and a gateway TP physical layer PHY;
the node KNX-RF link layer and the gateway KNX-TP link layer are added with a permutation combination suitable for LoRa communication transmission on the basis of reserving KNX-RF necessary information and are loaded into a payload PHYPayload of a LoRa physical layer;
the terminal node and the KNX-RF gateway are connected through LoRa-RF communication.
And the terminal node comprises a node LoRa communication circuit, a node MCU, a peripheral interface, a node power supply circuit and a protocol layer, wherein the protocol layer comprises a node KNX application layer, a node KNX transmission layer, a node KNX network layer, a node LoRa physical layer PHY and a node KNX-RF link layer of a standard protocol. Specifically, the node loRa communication circuit is used as a communication medium and a physical layer (PHY) of the whole communication protocol to realize the loRa RF wireless communication; the node MCU realizes protocol layers such as a link, a network, transmission and application based on the LoRa physical layer PHY; the peripheral interface is connected with various sensors and actuators for collecting and outputting switching values; the node power supply circuit is used for supplying power to the terminal node.
As shown in the left diagram of fig. 3, in the protocol layer of the terminal node, the node KNX application layer, the node KNX transmission layer, the node KNX network layer, and the node LoRa physical layer PHY all use standard protocols, and only the node KNX-RF link layer is designed. As shown in fig. 4, the KNX-RF link layer, which is composed of the KNX-RF proprietary part information such as the characteristic length, the control word, the domain address (or the serial number), etc. and the part behind the KNX-Ctrl, which is the general part of the KNX-TP protocol, retains the necessary information in the standard KNX-RF when the KNX-RF link layer is redesigned, and performs the permutation and combination suitable for the LoRa communication transmission again, and then loads the permutation and combination into the payload PHYPayload of the LoRa physical layer, i.e. the RF communication can be performed by means of the LoRa physical layer.
The KNX-RF gateway comprises a KNX communication circuit, a gateway MCU, a gateway LoRa communication circuit, a gateway power supply circuit, a gateway KNX application layer of a standard protocol, a gateway KNX transmission layer, a gateway KNX network layer, a gateway LoRa physical layer PHY, a gateway KNX-RF link layer, a gateway KNX-TP link layer and a gateway TP physical layer PHY. Specifically, the KNX communication circuit is used for realizing a physical layer and a link layer of KNX-TP communication; the gateway MCU is used for completing the functions of a link, a network, a transmission protocol layer and the like based on the LoRa physical layer and the KNX-TP physical layer, a gateway route and the like; the gateway LoRa communication circuit is used as a communication medium and a physical layer (PHY) of the whole communication protocol to realize LoRa-RF wireless communication; the gateway power supply circuit is used for supplying power to the gateway.
As shown in the right diagram of fig. 3, the gateway KNX application layer, the gateway KNX transport layer, the gateway KNX network layer, and the gateway LoRa physical layer PHY in the protocol layer of the gateway all use standard protocols, and only the KNX-RF link layer is redesigned, so that the link layer and the physical layer support both the LoRa-based physical layer PHY and the KNX-RF link layer, and also support the standard KNX-TP physical layer and the link layer.
The KNX wireless communication system based on the LoRa physical layer is composed of a plurality of terminal nodes and KNX-RF gateways, wherein the number of the terminal nodes is multiple, the number of the KNX-RF gateways is multiple, a star network structure is formed, and relaying is not needed. The terminal node is connected with various sensors and actuators through various special peripheral interfaces, such as a switch panel and keys through a switching value acquisition peripheral interface; the actuator module is controlled to be opened and closed through switching value output, and a battery power supply scheme can be adopted for the switching value acquisition terminal node.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (6)
1. A KNX wireless communication method based on a LoRa physical layer is characterized by comprising the following steps:
s1, redesigning the KNX-RF link layer of the terminal node protocol layer and the KNX-RF gateway protocol layer respectively, reserving necessary information in standard KNX-RF, and performing permutation and combination suitable for LoRa communication transmission again, wherein the KNX-RF link layer is composed of a KNX-RF special part information of the characteristic length, the control word, the domain address or the serial number, the part behind the KNX-Ctrl and a KNX-TP protocol universal part to form a new KNX-RF link layer;
the step of maintaining necessary information in standard KNX-RF in S1 includes maintaining standard protocols for KNX application, transport, network layer, and LoRa physical layer PHY;
s2, loading the new KNX-RF link layer in S1 into a payload PHYPayload of a LoRa physical layer to form a new terminal node protocol layer and a KNX-RF gateway protocol layer;
s3, respectively constructing a new terminal node and a KNX-RF gateway based on the new terminal node protocol layer and the KNX-RF gateway protocol layer in the S2, and forming a KNX wireless communication system based on the LoRa physical layer to realize KNX wireless communication.
2. The KNX wireless communication method according to claim 1, wherein the rearrangement suitable for LoRa communication transmission in S1 is performed by adding a KNX-TP protocol universal part to the proprietary part information of the KNX-RF link layer, and performing the rearrangement suitable for LoRa communication transmission again.
3. A KNX wireless communication system based on loRa physical layer, characterized by comprising:
the terminal node comprises a node LoRa communication circuit, a node MCU, a peripheral interface, a node power supply circuit and a protocol layer, wherein the protocol layer comprises a node KNX application layer, a node KNX transmission layer, a node KNX network layer, a node LoRa physical layer PHY and a node KNX-RF link layer of a standard protocol; and a KNX-RF gateway, which comprises a KNX communication circuit, a gateway MCU, a gateway LoRa communication circuit, a gateway power supply circuit, a gateway KNX application layer of a standard protocol, a gateway KNX transmission layer, a gateway KNX network layer, a gateway LoRa physical layer PHY, a gateway KNX-RF link layer, a gateway KNX-TP link layer and a gateway TP physical layer PHY;
the node KNX-RF link layer and the gateway KNX-TP link layer keep necessary information in standard KNX-RF and carry out permutation and combination suitable for LoRa communication transmission again, wherein the KNX-RF link layer consists of a KNX-RF special part information of the characteristic length, the control word, the domain address or the serial number, a part behind the KNX-Ctrl and a KNX-TP protocol general part and is loaded into a payload PHYPayloyload of a LoRa physical layer;
and the terminal node is connected with the KNX-RF gateway through LoRa-RF communication.
4. The KNX wireless communication system based on the LoRa physical layer according to claim 3, characterized in that the node LoRa communication circuit is used as a communication medium and a physical layer PHY of the whole communication protocol to realize the LoRa RF wireless communication; the node MCU realizes a link, a network, a transmission and application protocol layer based on the LoRa physical layer PHY; the peripheral interface is connected with various sensors and actuators for collecting and outputting switching values; the node power supply circuit is used for supplying power to the terminal node.
5. The KNX wireless communication system based on the LoRa physical layer according to the claim 3, characterized in that, the KNX communication circuit is used for realizing the physical layer and the link layer of the KNX-TP communication; the gateway MCU is used for completing the functions of a link, a network, a transport protocol layer and a gateway route based on the LoRa physical layer and the KNX-TP physical layer; the gateway LoRa communication circuit is used as a communication medium and a physical layer PHY of the whole communication protocol to realize LoRa-RF wireless communication; the gateway power supply circuit is used for supplying power to the gateway.
6. A LoRa physical layer-based KNX wireless communication system as claimed in claim 3, wherein there are a plurality of said end nodes and said KNX-RF gateways, and said plurality of end nodes and said plurality of KNX-RF gateways form a star network architecture.
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| CN208143557U (en) * | 2018-04-24 | 2018-11-23 | 南京数帆信息科技有限公司 | A kind of KNX dimming driver based on LoRa technology |
| CN208143237U (en) * | 2018-04-24 | 2018-11-23 | 南京数帆信息科技有限公司 | A kind of KNX IP gateway based on LoRa technology |
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