Method for identifying network device by means of short training field symbol in radio frame and for achieving security

Abstract

The present invention belongs to the technical field of wireless communications. Disclosed is a method for identifying a network device by means of a short training field (STF) symbol in a radio frame and for achieving security. The network device security method comprises the specific steps of: S1, configuring STF sequences and the number thereof; S2, sending radio frames, which have consistent STFs; S3, after random symbols are inserted, sending LTFs; S4, performing reception and verifying the consistency of STF formats; S5, when consistency is achieved, continuing receiving the radio frames; S51, tracking a radio frame, which has a specific STF; S52, receiving and parsing a radio frame signal; and S6, when consistency is not achieved, terminating the reception. By implementing the solution, at a physical layer of a radio signal, the network isolation from existing radio techniques and the device isolation between WIA-FA networks are better achieved. Therefore, at the physical layer, other illegitimate devices are effectively prevented from accessing a network, so as to realize the screening and isolation of data, thereby ensuring the security of a communication network.

Description

A method for identifying network devices and achieving security using short training domain symbols in wireless frames. Technical Field

[0001] This invention belongs to the field of wireless communication technology, specifically a method for identifying network devices and achieving security through STF symbols in wireless frames. Background Technology

[0002] With the development of intelligent manufacturing in my country, the high real-time and high-reliability industrial wireless WIA-FA technology has been applied in various key industries. The MAC layer of WIA-FA network technology is based on a TDMA access mechanism, ensuring deterministic communication cycles and latency, making it suitable for industrial control applications. However, in some industrial settings, the security of wireless data transmission remains a crucial issue that needs to be explored and resolved.

[0003] Current wireless network data transmission relies on software encryption, and incidents such as wireless signals being detected, data encryption algorithms being cracked, and wireless data leaks are frequently reported. Based on these findings, this paper proposes a security solution that uses STF symbols in wireless frames to identify network devices.

[0004] Summary of the Invention

[0005] The purpose of this invention is to provide a method for identifying network devices and achieving security through STF symbols in wireless frames, in order to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a method for securing network devices by identifying network devices using STF symbols in wireless frames, wherein the specific steps of the network device security method are as follows:

[0007] S1, through register configuration, configures unique STF (Short Training Field) sequence content and the number of STF symbols to be sent for transmitting radio frames for the devices that make up the WIA-FA network;

[0008] S2, the transmitting device sends a wireless frame with the same STF sequence content and the same number of STF symbols;

[0009] S3, after the STF symbol transmission is completed, insert 0-N random symbols, and then continue to transmit the LTF symbol content of the radio frame;

[0010] S4. When a WIA-FA network device receives a radio frame, it determines whether the STF symbol format in the received radio frame is consistent with the register configuration of the receiving end, based on the principle of consistency of STF symbol format in the radio frame.

[0011] S5, determine if the STF symbol format in the received wireless frame is consistent with the receiver register configuration, and the WIA-FA network device continues to receive wireless frames;

[0012] When receiving wireless frames, the S51 WIA-FA network device only tracks wireless frame signals whose received STF content is the same as the receiving device register configuration and whose number of STFs in the wireless frame is the same as the receiving device register configuration.

[0013] S52, after the receiving end has finished receiving the STF symbol, it continues to receive and parse the wireless signal of the wireless frame;

[0014] S6. If it is determined that the STF symbol format in the received radio frame is inconsistent with the receiver register configuration, then the tracking and reception of the radio frame shall be terminated.

[0015] Preferably, it further includes: setting the number of STF symbols to be transmitted when transmitting a radio frame, and ensuring that the STF sequence content and the number of STF symbols in the radio frames transmitted by all devices in the same WIA-FA network are consistent.

[0016] Preferably, it further includes: after sending the STF symbol, inserting 0 to N random symbols, and then continuing to send the subsequent content of the wireless frame, so as to enhance the security of communication and make it difficult for other wireless devices to track and analyze the wireless signal.

[0017] Preferably, the access devices in the network can periodically update the content of the STF sequence in the network according to the surrounding wireless environment and usage requirements, and configure the STF sequence content of the wireless frames sent by the field devices via wireless frames.

[0018] Preferably, the device is a WIA-FA network device, including a register or configuration interface for configuring STF sequence content, and a transmitter for sending wireless frames containing customized STF sequence content, wherein the STF sequence content serves as a unique identifier for the device or contains encrypted information.

[0019] Preferably, it also includes a control unit for setting and controlling the number of STF symbols when transmitting radio frames to ensure compatibility with other devices within the same network.

[0020] Preferably, it also includes a random symbol generator for inserting 0 to N random symbols after sending STF symbols to enhance the security of communication.

[0021] Preferably, it also includes an STF sequence update module, which is used to periodically update the STF sequence content according to the surrounding wireless environment and usage requirements, and to receive and configure new STF sequence content via wireless frames.

[0022] Preferably, the network device is required by default to support at least N STF sequences in order to provide reliability for wireless signal transmission between devices.

[0023] The beneficial effects of this invention are as follows:

[0024] This solution identifies network devices by designing STF symbols in the composition of wireless frames and achieves secure control of wireless signals. When a wireless frame is transmitted, the STF is sent as the primary signal. The receiving device determines whether to continue receiving the signal by verifying the format requirements of the STF, thus achieving the goal of ensuring communication security from the source. It effectively isolates illegal devices in existing wireless technologies and WIA-FA networks, ensures the screening and isolation of data during transmission, and thus comprehensively improves the security of the communication network.

[0025] This solution effectively isolates the wireless signal from existing wireless technologies at the physical layer, and isolates devices between WIA-FA networks. It effectively prevents unauthorized devices from joining the network at the physical layer, enabling data filtering and isolation, and ensuring the security of the communication network. Attached Figure Description

[0026] Figure 1 is a simplified flowchart of the safety method of the present invention;

[0027] Figure 2 is a structural diagram of the wireless transmission frame of the present invention. Detailed Implementation

[0028] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0029] As shown in Figures 1 and 2, this embodiment of the invention provides a method for achieving network device security by identifying network devices using short training field (STF) symbols in wireless frames. The specific steps of this network device security method are as follows:

[0030] S1, through register configuration, configures unique STF (Short Training Field) sequence content and the number of STF symbols to be sent for transmitting radio frames for devices that make up the WIA-FA network; the STF sequence content serves as a unique identifier for the device or contains encrypted information for device identification and communication security;

[0031] S2, the transmitting device sends a wireless frame with the same STF sequence content and the same number of STF symbols;

[0032] S3, after the STF symbol transmission is completed, insert 0-N random symbols, and then continue to transmit the LTF symbol content of the radio frame;

[0033] S4. When a WIA-FA network device receives a radio frame, it determines whether the STF symbol format in the received radio frame is consistent with the configuration of the receiver register, based on the principle of consistency of STF symbol format in the radio frame.

[0034] S5, determine if the STF symbol format in the received wireless frame is consistent with the receiver register configuration, and the WIA-FA network device continues to receive wireless frames;

[0035] When receiving wireless frames, the S51 WIA-FA network device only tracks wireless frame signals whose STF content is the same as the receiver register configuration and whose number of STFs in the wireless frame is the same as the receiver register configuration. By inserting 0-N random symbols into the STF, it makes it impossible for other wireless devices to track and parse the wireless signal.

[0036] S52, after the receiving end has finished receiving the STF symbol, it continues to receive and parse the wireless signal of the wireless frame;

[0037] S6. If the determination is inconsistent, then stop tracking and receiving the wireless frame.

[0038] When a radio frame is transmitted, a Short Training Sequence (STF, a sequence of regularly ordered 0s and 1s) is sent first. The receiving device tracks the radio frame signal based on the STF. If the STF symbols meet the format requirements of the received frame, the receiving device will continue to track and receive the radio signal.

[0039] This further includes: setting the number of STF symbols to be sent when transmitting radio frames, and ensuring that the STF sequence content and the number of STF symbols in the radio frames transmitted by all devices in the same WIA-FA network are consistent.

[0040] Security is ensured by transmitting identical STF sequence content that makes up the radio frame, and by configuring the WIA-FA network to have the same number of STF symbols in the radio frame. Furthermore, when receiving radio frames, WIA-FA network devices only track radio frame signals whose received STF content and the number of STF symbols in the radio frame are identical to those configured in the receiver's registers.

[0041] This also includes inserting 0 to N random symbols after sending the STF symbol, and then continuing to send the subsequent content of the wireless frame to enhance the security of communication and make it difficult for other wireless devices to track and analyze the wireless signal.

[0042] WIA-FA network devices support configuration via registers, etc. After transmitting the STF symbol, the device can insert 0-N random symbols before continuing to transmit the LTF symbol content of the radio frame. The receiving end, after receiving the STF symbol, continues to receive and parse the radio signal of that radio frame. By inserting 0-N random symbols into the STF, other wireless devices cannot track and parse the radio signal.

[0043] The access devices in the network can periodically update the content of the STF sequence in the network according to the surrounding wireless environment and usage requirements, and configure the STF sequence content of the wireless frame to be sent by the field devices through wireless frames.

[0044] Access devices in the network can periodically update the STF symbol sequence content in the network according to the surrounding wireless environment and usage requirements; field devices in the network can configure the STF symbol sequence content of the wireless frames they send via wireless frames.

[0045] The device is a WIA-FA network device, which includes a register or configuration interface for configuring STF sequence content, and a transmitter for sending wireless frames containing customized STF sequence content, which serves as a unique identifier for the device or contains encrypted information.

[0046] It also includes a control unit for setting and controlling the number of STF symbols when transmitting radio frames to ensure compatibility with other devices within the same network.

[0047] It also includes a random symbol generator, which inserts 0 to N random symbols after sending STF symbols to enhance the security of communication.

[0048] WIA-FA network devices support configuration via registers, etc. After transmitting the STF symbol, the device can insert 0-N random symbols before continuing to transmit the LTF symbol content of the radio frame. The receiving end, after receiving the STF symbol, continues to receive and parse the radio signal of that radio frame. By inserting 0-N random symbols into the STF, other wireless devices cannot track and parse the radio signal.

[0049] After transmitting the STF sequence, devices in a WIA-FA network distinguish a type of device by the number of random symbols (0-N). The receiving end can be configured to continue tracking the maximum random symbol or a specified random symbol after receiving the STF symbols; only radio frames meeting this requirement can be received normally. Access devices within the WIA-FA network can control the reception of radio signals from a specific type of device.

[0050] It also includes an STF sequence update module, which is used to periodically update the STF sequence content according to the surrounding wireless environment and usage requirements, and to receive and configure new STF sequence content via wireless frames.

[0051] WIA-FA network devices, including access devices in the network, can periodically update the STF symbol sequence content in the network according to the surrounding wireless environment and usage requirements; field devices in the network support configuring the STF symbol sequence content of the wireless frames sent by the device via wireless frames.

[0052] This also includes the requirement that network devices support at least N STF sequences by default in order to provide reliability for wireless signal transmission between devices.

[0053] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0054] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A method for achieving security by identifying network devices using short training domain symbols in wireless frames, characterized in that: The network device security method includes the following steps: S1, through register configuration, configures unique short training domain sequence content for the devices that make up the WIA-FA network, as well as the number of short training domain symbols to be sent for transmitting radio frames; S2, transmit wireless frames with identical short training domain sequence content and the same number of short training domain symbols through the transmitting device; S3, after the short training domain symbols are sent, insert 0-N random symbols, and then continue to send the LTF symbol content of the radio frame; S4. When a WIA-FA network device receives a radio frame, it determines whether the short training field symbol format in the received radio frame is consistent with the configuration of the receiver and registers, based on the principle of consistency of the short training field symbol format in the radio frame. S5. If it is determined that the short training domain symbol format in the received radio frame is consistent with the receiver register configuration, the WIA-FA network device continues to receive radio frames. S51, when a WIA-FA network device receives a radio frame, it only tracks radio frame signals whose short training field content is the same as the receiving device register configuration and whose number of short training fields in the radio frame is the same as the receiving device register configuration. S52, after the receiving end has received the short training domain symbol, it continues to receive and parse the wireless signal of the wireless frame. S6. If it is determined that the short training domain symbol format in the received wireless frame is inconsistent with the receiver register configuration, then the tracking and reception of the wireless frame shall be terminated.

2. The method for achieving security by identifying network devices using short training domain symbols in wireless frames according to claim 1, characterized in that: Further includes: Set the number of short training domain symbols to be sent when transmitting radio frames, and ensure that the short training domain sequence content and the number of short training domain symbols in the radio frames transmitted by all devices in the same WIA-FA network are consistent.

3. The method for achieving security by identifying network devices using short training domain symbols in wireless frames according to claim 1 or 2, characterized in that: Also includes: After sending a short training domain symbol, 0 to N random symbols are inserted before continuing to send the subsequent content of the wireless frame to enhance the security of the communication, making it difficult for other wireless devices to track and analyze the wireless signal.

4. The method for achieving security by identifying network devices using short training domain symbols in wireless frames according to any one of claims 1-3, characterized in that: Access devices in the network can periodically update the content of short training domain sequences in the network according to the surrounding wireless environment and usage requirements, and configure the short training domain sequence content to be sent by field devices via wireless frames.

5. The network device for identifying network devices using short training domain symbols in wireless frames according to claim 1, characterized in that: The device is a WIA-FA network device, including a register or configuration interface for configuring short training domain sequence content, and a transmitter for transmitting radio frames containing customized short training domain sequence content, which serves as a unique identifier for the device or contains encrypted information.

6. The network device for identifying short training domain symbols in a wireless frame according to claim 5, characterized in that: It also includes a control unit for setting and controlling the number of short training domain symbols when transmitting wireless frames to ensure compatibility with other devices within the same network.

7. The network device for identifying network components using short training domain symbols in a wireless frame according to claim 5 or 6, characterized in that: It also includes a random symbol generator for inserting 0 to N random symbols after sending short training domain symbols to enhance the security of communication.

8. The network device for identifying network devices via short training domain symbols in wireless frames according to any one of claims 5-7, characterized in that: It also includes a short training domain sequence update module, which is used to periodically update the short training domain sequence content according to the surrounding wireless environment and usage requirements, and to receive and configure new short training domain sequence content via wireless frames.

9. The network device for identifying short training domain symbols in a wireless frame according to claim 5, characterized in that: It also includes the requirement that network devices, by default, support at least N short training domain sequences to provide reliability for wireless signal transmission between devices.

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