CN113721527A - Data interaction method and system based on dual communication channels and valve terminal control system - Google Patents
Data interaction method and system based on dual communication channels and valve terminal control system Download PDFInfo
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Abstract
The invention discloses a data interaction method and system based on a dual communication channel and a valve island control system, wherein the data interaction method comprises the following steps: after the control host is accessed into the server through the dual communication channel, an authentication request sent by the control host is received through the management channel, and identity authentication is carried out; after the identity authentication is passed, allocating resource types and resource quantities for the control host according to the access quantity and the data length of the control host, and obtaining the channel width of a data channel; performing channel allocation according to the connection state of the control host, channel parameters and communication code rates required by communication to obtain a channel configuration file, and sending the channel configuration file to the corresponding control host; and after receiving the channel configuration response of the control host through the data channel, obtaining a transmission priority according to the connection rate between the server and the control host and the data refreshing frequency, and performing data interaction according to the transmission priority. And a multi-band sharing mode is adopted, and a communication mechanism is upgraded, so that the data interaction rate is higher, and the reliability is higher.
Description
Technical Field
The invention relates to the technical field of valve terminal control and data interaction, in particular to a data interaction method and system based on a dual communication channel and a valve terminal control system.
Background
The statements in this section merely provide background information related to the present disclosure and may not necessarily constitute prior art.
The pneumatic technology is an automatic control technology which takes compressed air as a power source to control the action, and is an important means for realizing production and automatic control. The pneumatic control is widely popularized and applied by virtue of the advantages of low cost, simple structure and high reliability, and has a very important position in the field of automation. But there are some practical problems in the practical application process. The main control parts of the pneumatic control are an electromagnetic valve and an air cylinder, and the electromagnetic valve is controlled by taking a PLC (programmable logic controller) or other control parts as a control center, so that the action of the air cylinder is controlled.
In actual use, a connecting cable between a control center and an electromagnetic valve is a weak item of a control link, and mainly comprises the problems of long cable length, large cable quantity, high cable following movement damage rate and the like, and a series of cable faults of high cable maintenance cost, high damage rate and the like, wherein the problems of long downtime are caused because the cables are large in quantity and long in length and occupy a large amount of time in the maintenance process; the communication cable fault is one of all field faults with the highest maintenance cost, and is also a fault which cannot be completely avoided.
In the traditional pneumatic control, a bus plate is mainly used as a bearing mode of an electromagnetic valve, and a cable bundle with a large label is additionally arranged as a control cable of the electromagnetic valve. With the continuous development of automation technology, the problem of improving pneumatic control is continuously generated in the valve island technology, but the problem is not completely solved. The pneumatic valve island integrates the electromagnetic valve and the electric driving module together, so that the structure is more compact and the reliability is higher; the pneumatic valve island is used as a new generation of gas-electricity integrated control component and goes through multiple stages such as a multi-pin type and a field bus type, and with the development, the bus type valve island is changed from an industrial bus form such as RS485 and CAN into an Ethernet bus form, but the problem of multiple cables always exists.
Disclosure of Invention
In order to solve the problems, the invention provides a data interaction method and system based on a dual communication channel and a valve island control system, which adopt a multi-band sharing mode of a data channel and a management channel, optimize channel allocation by balancing real-time requirements and rate, evaluate channel quality, enable a plurality of control hosts to use the same sending mode, ensure data encapsulation and splicing and data synchronism, and reduce channel competition.
In order to achieve the purpose, the invention adopts the following technical scheme:
in a first aspect, the present invention provides a data interaction method based on dual communication channels, including:
after the control host is accessed into the server through the dual communication channel, an authentication request sent by the control host is received through the management channel, and identity authentication is carried out;
after the identity authentication is passed, allocating resource types and resource quantities for the control host according to the access quantity and the data length of the control host, and obtaining the channel width of a data channel;
performing channel allocation according to the connection state of the control host, channel parameters and communication code rates required by communication to obtain a channel configuration file, and sending the channel configuration file to the corresponding control host;
and after receiving the channel configuration response of the control host through the data channel, obtaining a transmission priority according to the connection rate between the server and the control host and the data refreshing frequency, and performing data interaction according to the transmission priority.
In a second aspect, the present invention provides a data interaction system based on dual communication channels, including:
the identity authentication module is configured to receive an authentication request sent by the control host through the management channel and then perform identity authentication;
the resource allocation module is configured to allocate resource types and resource quantities for the control host according to the access quantity and the data length of the control host after the identity authentication is passed, and obtain the channel width of the data channel;
the channel configuration module is configured to perform channel allocation according to the connection state of the control host, channel parameters and communication code rates required by communication to obtain a channel configuration file, and send the channel configuration file to the corresponding control host;
and the data interaction module is configured to receive the channel configuration response of the control host through the data channel, obtain a transmission priority according to the connection rate between the server and the control host and the data refreshing frequency, and perform data interaction according to the transmission priority.
In a third aspect, the present invention provides a valve island control system comprising: the valve island server and the valve island control host; the valve island server is provided with the data interaction system of the second aspect, and performs data interaction with the valve island control host by adopting the data interaction method of the first aspect.
Compared with the prior art, the invention has the beneficial effects that:
the WIFI6 is used as a communication channel to realize the connection of the control center, the server and the control host, the WIFI6 is used as a transmission channel to perform pneumatic control, the problems of long delay time, uncertain delay time, high possibility of interference on transmission signals and the like in WIFI6 transmission are solved, and meanwhile, the problems of network node capacity and concurrency are solved.
The invention fully considers the factors of high reliability and real-time performance, the 5G and 2.4G are combined and applied, the 5G channel is used for real-time data communication and only used for data transmission, other management services are not applied, the low delay and reliability of the data are ensured, the 2.4G channel is used for equipment management, information maintenance, identity authentication, data backup channel and the like, and the 5G channel is used as an emergency channel for data transmission when the 5G channel fails, so that the reliability of the data is further ensured.
The invention uses WIFI6 technology to apply OFDMA and MU-MIMO to multipoint connection of a valve island control center, thereby improving concurrency and channel utilization rate. And in order to ensure the transmission reliability and environmental adaptability, the beam forming is used to ensure that the communication transmission between the server and the control host is more reliable and stable.
In order to solve the problems of WIFI transmission delay and uncertain delay caused by channel competition, a transmission mechanism is changed into a master-slave mode in a data channel, a server uniformly manages data receiving and transmitting of equipment, competition is avoided as far as possible, channel optimization adjustment opportunity is placed after data transmission or when data transmission fails, OFDMA and MU-MIMO are introduced simultaneously, data concurrency is improved, data can be received and transmitted to a plurality of or all control hosts simultaneously, and equipment is prevented from competing for channels.
Advantages of additional aspects of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.
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The accompanying drawings, which are incorporated in and constitute a part of this specification, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate exemplary embodiments of the invention and together with the description serve to explain the invention and not to limit the invention.
Fig. 1 is a flowchart of data interaction provided in embodiment 1 of the present invention.
The specific implementation mode is as follows:
the invention is further described with reference to the following figures and examples.
It is to be understood that the following detailed description is exemplary and is intended to provide further explanation of the invention as claimed. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of exemplary embodiments according to the invention. As used herein, the singular forms "a", "an", and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise, and it should be understood that the terms "comprises" and "comprising", and any variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
The embodiments and features of the embodiments of the present invention may be combined with each other without conflict.
Example 1
As shown in fig. 1, this embodiment provides a data interaction method based on dual communication channels, including:
s1: after the control host is accessed into the server through the dual communication channel, an authentication request sent by the control host is received through the management channel, and identity authentication is carried out;
s2: after the identity authentication is passed, allocating resource types and resource quantities for the control host according to the access quantity and the data length of the control host, and obtaining the channel width of a data channel;
s3: performing channel allocation according to the connection state of the control host, channel parameters and communication code rates required by communication to obtain a channel configuration file, and sending the channel configuration file to the corresponding control host;
s4: and after receiving the channel configuration response of the control host through the data channel, obtaining a transmission priority according to the connection rate between the server and the control host and the data refreshing frequency, and performing data interaction according to the transmission priority.
In this embodiment, in the server, first, protocol forwarding is optimized, and a Profinet/ethercat protocol is used to optimize Ethernet, so as to reduce the forwarding delay and uncertainty and ensure high real-time performance of control data; the Profinet/ethercat protocol adopts an 802.3 protocol, the WIFI transmission adopts an 802.11 protocol, necessary protocol conversion is needed, meanwhile, the real-time problem is considered, the delay uncertainty caused by the uncertainty of forwarding is needed to be considered during the protocol conversion, and the priority and the overhead control of forwarding are processed during the protocol conversion and the forwarding.
And secondly, in WIFI management, equipment management and data interaction are included, wherein the equipment management mainly comprises identity authentication of a control host, channel allocation, a time division multiplexing mechanism, a data transmission rate, management channel allocation, priority allocation and the like. The most core technology in the Wifi6 technology is OFDMA and MU-MIMO, OFDMA adopts OFDM orthogonal frequency division multiplexing technology, so that the same channel can contain more network devices, the utilization rate of bandwidth is improved, and simultaneously a plurality of devices with the same priority and high synchronization requirements can be distributed to the same channel for simultaneous transmission, thereby solving the problem of network delay caused by data multi-stage forwarding; the MU-MIMO technology adopts multiple transmitting and multiple receiving channels, uses multiple antennas to transmit in parallel, and further realizes the synchronization and real-time performance of multiple devices. In conventional network deployment, the same server can simultaneously and parallelly communicate with 64-128 devices, so that low-delay data transmission is guaranteed.
The wifi6 chip with wifi6802.11ax used in this embodiment is marvell (now owned by NXP corporation), supports 8x8 MIMO configuration, supports 4.8G bandwidth at most, uses 5.8G communication band, and uses a piece of 802.11ac chip 88W8964 with 2.4G 4x4 MIMO configuration as a management channel. The two frequencies are used simultaneously and are combined in a division manner.
The server also comprises the verification of the legality of the control host, and the safe encryption of the data content, so that the confidentiality of the data is ensured, and meanwhile, the interference of illegal data is prevented.
In this embodiment, in the control host, the wifi6 chip (now belonging to NXP corporation) IW620 with marvell as low-profile wifi6802.11ax is used, supports 2x2 MIMO configuration, supports 1.2G bandwidth at the highest, uses 5.8G communication band, and uses 2.4G band channel as management channel, thereby reducing cost.
Meanwhile, the control host actively reports identity information to the server for identity authentication, reports information of an execution module managed by the control host, and the server performs unified organization management and positioning; the control host also reports the self health state and the health state of the execution module periodically, and reports the abnormal condition in real time.
In the embodiment, taking a valve island server and a valve island control host as an example, in an execution module managed by the valve island control host, hot plug identification, online condition monitoring, health state detection of the execution module, data interaction and priority processing of the execution module and the like can be realized; the execution module of the starting valve island mainly takes electromagnetic valve control as a main part, and can integrate other types of input and output modules related to pneumatic control as extension signals, wherein the extension execution module is mainly divided into an IO input module, an IO output module, a relay output module, a 0-10V input module, a 4-20mA output module, a 4-20mA input module, an RTD/CT input module, a high-speed pulse output module, a pulse counter and the like.
In this embodiment, in step S1, a communication connection is established between the server and the control host through the dual communication channel, the server and the control host perform data transmission using wireless signals, and the transmitted data is divided into control data and management data, so that the control data is transmitted using the data channel, and the data channel uses a 5G frequency band for transmission, and uses an 802.11ax protocol; management data is transmitted by using a management channel, the management channel transmits by using a 2.4G frequency band, an 802.11ax protocol is preferentially used, and the 802.11ac protocol can also be used because the management channel has no strict requirements on data volume and real-time performance.
The data processing of the management channel comprises the following steps: the method comprises the steps of controlling access of host equipment, identity authentication, configuration information of a host, heartbeat mechanism of the host, diagnosis information and health monitoring of the host and the like, and has low real-time requirement on data and small data volume, so that data of a management channel can be routed to a higher-level management monitoring host by adopting a TCP/IP protocol stack.
In this embodiment, a multi-band sharing technology is adopted between the server and the control host, and 2.4G and 5G bands are used simultaneously, that is, a data channel of the 5G band and a management channel of the 2.4G band, a processing flow shared by two bands is used, and when serious interference and failure occur in the 5G band, the 2.4G band is used as the data channel. When the 5G channel is used as a data channel, no Beacon frame is sent, the equipment is not allowed to access through the 5G frequency band, the 5G frequency band does not process a user interaction flow, data optimization of the 5G channel is processed by a server, and network delay is reduced to the maximum extent;
therefore, in the embodiment, the control host is accessed through the management channel to perform processing such as identity authentication, but when the 2.4G channel is used as the management channel, the Beacon frame is not sent in the working mode, and the ordinary device user cannot find the Beacon frame through network scanning, but can connect through the MAC, thereby avoiding unnecessary network delay and attack.
It should be noted that, in the network configuration phase, in order to reduce the complexity of device debugging, the sending of Beacon frames may be started in the debugging phase, and the control host may find the server through scanning and access the valve island server through the set user name and password.
In step S1, the control host performs identity authentication after accessing the server, sends an authentication request, and after receiving the authentication request, the server sends a random sequence to the control host, and after receiving the random sequence, the control host encrypts the random sequence using a set key, and sends an encrypted ciphertext to the server, and the server verifies the ciphertext, and if the ciphertext is correct, the identity authentication is passed, otherwise, the identity authentication fails.
In step S2, after the identity authentication of the control hosts passes, allocating the type and location of resource RU (resource unit) to each control host according to the number of control hosts accessing the server and the data length of each control host, and calculating the channel width of the data channel according to the total number of RUs;
specifically, the channel width supports CBW20, CBW40, CBW80, CBW160, and the RU supports 26, 52, 106, 242, 484, and 996 subcarrier types, and a smaller value indicates a smaller amount of data that can be transmitted;
for example, the CBW20 may contain 9 RUs of 26-subanticarrier type, and the server allocates an appropriate type of RU according to the data size of each control host and calculates the channel width of the data channel according to the total number of RUs; if there are 7 control hosts, 5 control hosts allocate RU26 type RU, 2 control hosts allocate RU52 type RU, and the width of 9 RU26 type RU is dedicated altogether, and the control hosts may allocate CBW20 channel width, or if more RUs are present, increase the channel width, and use CBW40 or CBW 80.
In this embodiment, a MU-MIMO multi-user multiple-input multiple-output technology is combined to send multiple parallel data streams to different control hosts, so as to improve system capacity, coverage and signal-to-noise ratio, and due to the relatively large distance between the control hosts, the frequency spectrum utilization rate and sending rate can be improved by using multi-stream parallel transmission; each control host supports 2x2 MIMO, the server supports 8x8 MIMO, each control host is associated with 2 antennas of the server, and the server and 4 control hosts simultaneously carry out data transmission, thereby greatly improving the concurrency of data.
In the embodiment, OFDMA and MU-MIMO are applied to multipoint connection, and beam forming is used for establishing communication transmission between a server and a control host, so that the concurrency capability and the delay performance of the server are improved; specifically, under the condition that the concurrency and the delay meet the requirements, the advantages of multiple antennas are used, the beam forming technology is utilized, signals sent by one or more antennas generate a certain phase difference, wireless signals can be superposed or interfered in a certain area, the signal strength is increased, and the signal stability and the environmental adaptability are improved.
In step S3, the server generates a channel configuration file for each control host according to the connection state of each control host and the channel parameters and communication code rate required in the communication process, and sends the corresponding configuration file to the control host that has passed the identity authentication.
Preferably, in the channel allocation process, the server needs to perform a trade-off process, and since the installation location of each control host is different and the data rate of the connection is different, the server needs to balance the relation between the real-time requirement and the rate to optimize the channel allocation, and complete the data transmission of all the control hosts in one data transmission as much as possible, thereby ensuring the synchronism of the data received by the control hosts.
In step S4, after receiving the configuration responses of all the control hosts, the data channel performs data interaction according to the channel configuration file, and after receiving the interaction data sent by the server, the control host sends the data that needs to be reported to the server as response data to complete a data interaction.
When data interaction is carried out, in order to prevent the data from being monitored and stolen, the data is safely encrypted; specifically, the server is used as an access point of the Profinet protocol, the Profinet protocol needs to be analyzed, data content is extracted, a target address of data is analyzed, an MAC address of the control host is determined, then the data content is packaged into 802.11 protocol content, only a first layer and a second layer of an OSI protocol stack are used, and a two-layer forwarding mode is adopted to avoid network delay caused by multi-layer forwarding; and meanwhile, the Qos priority of the data transmission is determined according to the wireless connection rate between the control host and the server and the data refreshing frequency of a preset value, finally, the data is packaged into a complete 802.11 protocol data packet, the data packet is sent through a 5G frequency band by using a data channel, and the packaging process simultaneously uses a standard wpa3 encryption mode in wifi6 to prevent the data from being monitored and stolen.
In this embodiment, because a random avoidance link exists in channel contention, the delay and delay uncertainty of WIFI transmission are prone to be caused, so to avoid channel contention, in this embodiment, a transmission mechanism is changed into a master-slave mode in a data channel, a server uniformly manages data transceiving of devices, contention is avoided as much as possible, and a channel optimization adjustment opportunity is placed after data transmission or when data transmission fails, OFDMA and MU-MIMO are introduced at the same time, so that data concurrency is improved, data can be simultaneously transceived to multiple or all control hosts, and device contention for the channel is avoided.
When the server allocates the channel, the channel quality is evaluated according to the connection state of the equipment, the transmission modulation mode and the speed are balanced, the data transmission speed and the modulation mode are reduced on the premise of confirming the time requirement, so that a plurality of control hosts use the same transmission mode, the data can be packaged and spliced, the data can be transmitted simultaneously, and the occurrence of competition is reduced.
In further embodiments, a data interaction system based on dual communication channels is further provided, including:
the identity authentication module is configured to receive an authentication request sent by the control host through the management channel and then perform identity authentication;
the resource allocation module is configured to allocate resource types and resource quantities for the control host according to the access quantity and the data length of the control host after the identity authentication is passed, and obtain the channel width of the data channel;
the channel configuration module is configured to perform channel allocation according to the connection state of the control host, channel parameters and communication code rates required by communication to obtain a channel configuration file, and send the channel configuration file to the corresponding control host;
and the data interaction module is configured to receive the channel configuration response of the control host through the data channel, obtain a transmission priority according to the connection rate between the server and the control host and the data refreshing frequency, and perform data interaction according to the transmission priority.
It should be noted that the modules correspond to the steps described in embodiment 1, and the modules are the same as the corresponding steps in the implementation examples and application scenarios, but are not limited to the disclosure in embodiment 1. It should be noted that the modules described above as part of a system may be implemented in a computer system such as a set of computer-executable instructions.
Based on the data interaction method and the data interaction system, in further embodiments, there is also provided a valve island control system, including: the valve island server and the valve island control host; the valve island server is internally provided with the data interaction system, and performs data interaction with the valve island control host by adopting the data interaction method.
In this embodiment, the valve island control system further includes a control center, the valve island server is in wired network connection with the control center (a general term for PLC and similar devices) through network forms such as Profinet and etherCat, and the connection between the valve island server and the control center adopts a mature and reliable existing network technology, which belongs to direct connection, and can be guaranteed in terms of data reliability and low latency without adopting excessive additional technologies.
The valve island server virtualizes all subordinate valve islands aiming at the control center, namely the valve island server virtualizes all subordinate valve islands, namely the control center is directly connected with the valve island server, and the valve island server collects all information of the valve island control host through managing the valve island control host, performs fusion in the valve island server and virtualizes the valve island control host; the valve island server is a complete execution mechanism in the view of the control center, the existence of the valve island control host cannot be sensed, and meanwhile, the configuration setting work can be completed only by associating and configuring the valve island server in the control center, so that the development difficulty and complexity are greatly reduced.
In the embodiment, the valve island server is connected with the valve island control host by adopting the WIFI6, and the WIFI6 has the characteristics of high speed, low delay, large capacity and high safety, the WIFI technology is applied to the field of valve island control, the factors of high reliability and real-time performance are fully considered, the 5G technology and the 2.4G technology are combined and applied, the 5G channel is used for real-time data communication and is only used for data transmission, other management services are not applied, and the low delay and the reliability of data are ensured; the 2.4G channel is used for equipment management, information maintenance, identity authentication, data backup channels and the like, and is used as an emergency channel for data transmission when the 5G channel fails, so that the reliability of data is further ensured.
The system of the embodiment also comprises an execution module for managing the valve island control host, wherein the execution module can be compatible with the execution module of the original product, so that resources can be reused, the design cost is reduced, meanwhile, the execution module is partially upgraded, the main upgrading content is the upgrading of the communication mechanism of the host module and the execution module, the speed is higher, and the reliability is higher; meanwhile, the system diagnosis capability is upgraded, so that the intelligent degree of the product is higher.
In this embodiment, the valve island control host manages hot plug identification, online state detection, health state detection, data interaction, priority processing and the like of the execution module, and when the device is started, the valve island control host needs to enumerate the connected execution modules and perform data interaction through the G-BUS;
when enumeration starts, an in-place signal is only effective for a first device, the first device changes the level of the in-place signal and feeds back the device to a valve island control host machine to be in place, the valve island control host machine distributes a device address to the first device, and after the address distribution and transmission are completed, the valve island control host machine enables the in-place signal of the first device by sending an in-place enabling command to the first device, so that the in-place signal is connected to a second device;
the second device monitors the in-place signal, changes the in-place signal, feeds back the in-place of the device to the valve island control host, the valve island control host allocates a device address to the second device, after the address allocation and the transmission are completed, the valve island control host enables the in-place signal of the second device through a command, and sequentially transmits the in-place signal until the valve island control host cannot monitor the change of the in-place signal, and the enumeration process is finished;
if an effective in-place signal appears in the operation process, the valve island control host identifies the plugging and unplugging action of the equipment, allocates an address to the new equipment, and the new equipment is online after the interaction is completed;
the execution module can define the priority level by self, and reports the priority level to the control host along with the equipment information during equipment enumeration, and the valve island control host can preferentially improve the interaction interval time according to the priority setting.
The valve island control host carries out data interaction with the execution module in real time through a G-BUS BUS, if data is overtime or wrong in verification, diagnostic information is generated, and the diagnostic information is reported to a valve island server; meanwhile, the valve island control host and the execution module can monitor the voltage condition of the valve island control host and the free state detection of the equipment, such as information of overcurrent, overvoltage, overheat, disconnection, short circuit and the like, and report the information to the valve island controller, and the valve island controller reports the information to the valve island server.
Although the embodiments of the present invention have been described with reference to the accompanying drawings, it is not intended to limit the scope of the present invention, and it should be understood by those skilled in the art that various modifications and variations can be made without inventive efforts by those skilled in the art based on the technical solution of the present invention.
Claims (10)
1. A data interaction method based on dual communication channels is characterized by comprising the following steps:
after the control host is accessed into the server through the dual communication channel, an authentication request sent by the control host is received through the management channel, and identity authentication is carried out;
after the identity authentication is passed, allocating resource types and resource quantities for the control host according to the access quantity and the data length of the control host, and obtaining the channel width of a data channel;
performing channel allocation according to the connection state of the control host, channel parameters and communication code rates required by communication to obtain a channel configuration file, and sending the channel configuration file to the corresponding control host;
and after receiving the channel configuration response of the control host through the data channel, obtaining a transmission priority according to the connection rate between the server and the control host and the data refreshing frequency, and performing data interaction according to the transmission priority.
2. The data interaction method based on dual communication channels as claimed in claim 1, wherein the dual communication channels include a 5G communication band and a 2.4G communication band, the 5G communication band is used as the data channel, and the 2.4G communication band is used as the management channel.
3. The dual communication channel-based data interaction method as claimed in claim 1, wherein the identity authentication comprises: after receiving an authentication request of the control host, sending a random sequence to the control host so that the control host encrypts the random sequence, and the server verifies the ciphertext, if the ciphertext is correct, the identity authentication is passed, otherwise, the identity authentication is failed.
4. The dual communication channel-based data interaction method as claimed in claim 1, wherein the channel width includes CBW20, CBW40, CBW80 and CBW160, and the resource types include 26, 52, 106, 242, 484 and 996 subcarrier types.
5. The method as claimed in claim 1, wherein after the control hosts access the server, each control host associates with an antenna of the server, and uses a beamforming technique to generate a phase difference between the wireless signals transmitted by at least one antenna and superimpose the wireless signals.
6. The data interaction method based on dual communication channels as claimed in claim 1, wherein during data interaction, the data destination address is parsed, the MAC address of the control host is determined, the data content is encapsulated into 802.11 protocol data packets using OSI protocol stack, and the data is transmitted through 5G band using data channel.
7. The dual communication channel-based data interaction method of claim 6, wherein data encryption is performed in a wpa3 encryption mode in WIFI6 during encapsulation.
8. The data interaction method based on dual communication channels as claimed in claim 1, wherein during data interaction, the control host sends data to be reported as response data to the server, completing a data interaction between the server and the control host; the data to be reported comprises the running state data of an execution module managed by the control host, the control host and the execution module perform data interaction through a G-BUS, in the running process of the execution module, in-place signals of the execution module are sequentially checked, and if the checking is wrong, the generated diagnosis information and the running state data are reported to the server.
9. A data interaction system based on dual communication channels is characterized by comprising:
the identity authentication module is configured to receive an authentication request sent by the control host through the management channel and then perform identity authentication;
the resource allocation module is configured to allocate resource types and resource quantities for the control host according to the access quantity and the data length of the control host after the identity authentication is passed, and obtain the channel width of the data channel;
the channel configuration module is configured to perform channel allocation according to the connection state of the control host, channel parameters and communication code rates required by communication to obtain a channel configuration file, and send the channel configuration file to the corresponding control host;
and the data interaction module is configured to receive the channel configuration response of the control host through the data channel, obtain a transmission priority according to the connection rate between the server and the control host and the data refreshing frequency, and perform data interaction according to the transmission priority.
10. A valve island control system comprising: the valve island server and the valve island control host; the valve island server is provided with the data interaction system of claim 9, and performs data interaction with the valve island control host by using the data interaction method of any one of claims 1 to 8.
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