Wireless ad hoc network anti-interference method, device and equipment based on wide and narrow band waveforms

Abstract

The invention relates to a wireless ad hoc network anti-interference method, device and equipment based on wide and narrow band waveforms. The method comprises the following steps that: a plurality of nodes adopt a TDMA (Time Division Multiple Access) protocol to carry out distributed networking at an initial working frequency to form a wireless ad hoc network; a wireless ad hoc network MAC layer TDMA time slot is divided into a control time slot adopting a narrow-band waveform and a service time slot adopting a broadband waveform, and the broadband waveform and the narrow-band waveform are fused by adopting a TD-FDMA protocol, so that wireless ad hoc network anti-interference based on the broadband and narrow-band fused waveform is realized; wherein in a control time slot, a TDMA protocol is adopted and a narrowband frequency hopping waveform is utilized to carry out wireless ad hoc network maintenance and ultrahigh-priority narrowband service transmission; and under the service time slot, adopting an FDMA protocol and utilizing the broadband adaptive frequency selection waveform to carry out broadband service transmission. By adopting the method, the scale of the wireless ad hoc network and the anti-interference performance and effectiveness of the network can be improved.

Description

Technical Field

[0001] The present application relates to the field of communication technology, and in particular to a method, device and equipment for wireless ad hoc network anti-interference based on wide- and narrow-band waveforms. Background Art

[0002] All nodes in wireless ad hoc networking communication technology communicate based on the same wireless frequency. In order to achieve stable and reliable networking in a strong interference electromagnetic environment, the following three anti-interference technologies are generally used: spread spectrum, frequency hopping and adaptive frequency selection.

[0003] Spread spectrum technology increases signal bandwidth and improves receiving gain, which reduces the signal-to-noise ratio requirements of the receiving device and can demodulate useful signals from certain interference signals, thereby achieving anti-interference function and increasing the coverage distance of communication equipment. However, spread spectrum technology will cause a sharp drop in communication bandwidth and cannot meet the needs of broadband communication.

[0004] Frequency hopping technology means that the wireless carrier frequency is controlled by a pseudo-random code. Within its working bandwidth, its frequency synthesizer continuously changes the frequency according to the random law of the pseudo-random code (PN code), thereby avoiding the interference signal frequency and realizing the anti-interference function of the equipment. However, regardless of whether there is interference in the electromagnetic environment or the distribution of the interference frequency, when frequency hopping technology is used, each node in the wireless ad hoc network communication system switches the frequency according to the pre-set frequency hopping pattern, and there is a high probability of hopping to the frequency of interference in the environment to work. At the same time, in broadband communication applications, due to the wide air interface signal, there are fewer frequencies that can be used for frequency hopping, and the jammer can quickly keep up with the frequency hopping frequency, thereby achieving interference. This technology not only sacrifices the service transmission rate, but also cannot effectively resist interference in broadband applications.

[0005] Adaptive frequency selection technology refers to the acquisition of spatial spectrum energy of each node based on spectrum sensing technology of each node, thereby forming their own spectrum sets. When receiving interference models, the system selects the frequency point with the lowest spatial spectrum energy from the frequency set for communication, thereby avoiding external signal interference. However, since distributed self-organizing network technology generally adopts the same frequency networking mode, each node has the same operating frequency. When the spatial spectrum energy sensed by each node is different at each frequency, the frequency sets of each node in the system are inconsistent. Adaptive frequency selection technology is prone to cause network chaos and fragmentation, and the convergence speed is slow, which cannot meet the needs of fast networking applications. Summary of the invention

[0006] Based on this, it is necessary to provide a wireless self-organizing network anti-interference method, device and equipment based on wide- and narrow-band waveforms to address the above-mentioned technical problems, ensure the stability and rate of the entire network and high-priority service transmission, do not affect the high efficiency of broadband service transmission, maintain the stability of the entire wireless self-organizing network, reduce communication overhead, and improve the networking scale and the network's anti-interference and effectiveness.

[0007] A wireless ad hoc network anti-interference method based on wide-narrowband waveforms, the method comprising: Multiple nodes use TDMA protocol to form a distributed network at the initial working frequency to form a wireless ad hoc network; The TDMA time slots of the MAC layer of the wireless ad hoc network are divided into control time slots using narrowband waveforms and service time slots using wideband waveforms, and the wideband waveform and narrowband waveform are merged using the TD-FDMA protocol to achieve anti-interference of the wireless ad hoc network based on the wide-narrowband fusion waveform; Among them, in the control time slot, the TDMA protocol is adopted and the narrowband frequency hopping waveform is used to maintain the wireless ad hoc network and transmit ultra-high priority narrowband services; in the service time slot, the FDMA protocol is adopted and the broadband adaptive frequency selection waveform is used to transmit broadband services.

[0008] In one embodiment, the wireless ad hoc network MAC layer TDMA time slot is divided into a control time slot using a narrowband waveform and a service time slot using a broadband waveform, including: Any one of the TDMA time slots is selected as a control time slot using a narrowband waveform, and the other time slots are selected as service time slots using a wideband waveform.

[0009] In one of the embodiments, the data format of the service time slot consists of a source address, a destination address, transmission frequency information and a spectrum sensing instruction.

[0010] In one embodiment, the method further comprises: For any node in the wireless ad hoc network, in the transmitting time slot in the service time slot of the node, the physical layer modifies the node air interface operating frequency by parsing the transmitting frequency information; in the receiving time slot in the service time slot of the node, the physical layer performs full channel background noise perception by parsing the spectrum sensing instruction, and forms the optimal frequency set of the node according to the perception result, and further informs the other nodes in the wireless ad hoc network of the optimal frequency set of the node by controlling the narrowband frequency hopping waveform adopted in the time slot according to the source address and target address of the communication; wherein the optimal frequency set is composed of the optimal frequencies at which several other nodes receive the information of the node.

[0011] In one embodiment, the narrowband waveform of the control time slot operates in a frequency hopping mode. In the control time slot, all nodes operate at the same frequency at the same time.

[0012] In one of the embodiments, the broadband waveform of the service time slot operates in a multi-concurrent multi-frequency point adaptive frequency selection mode. In the service time slot, the transmitting working frequency and the receiving working frequency of different nodes at the same time are different.

[0013] A wireless ad hoc network anti-interference device based on wide-narrowband waveform, the device comprising: A network building module is used for multiple nodes to form a distributed network using the TDMA protocol at the initial working frequency to form a wireless ad hoc network; The anti-interference module is used to divide the TDMA time slot of the wireless ad hoc network MAC layer into a control time slot using a narrowband waveform and a service time slot using a wideband waveform, and to fuse the wideband waveform and the narrowband waveform using the TD-FDMA protocol to achieve anti-interference of the wireless ad hoc network based on the wide-narrowband fusion waveform; Among them, in the control time slot, the TDMA protocol is adopted and the narrowband frequency hopping waveform is used to maintain the wireless ad hoc network and transmit ultra-high priority narrowband services; in the service time slot, the FDMA protocol is adopted and the broadband adaptive frequency selection waveform is used to transmit broadband services.

[0014] A computer device comprises a memory and a processor, wherein the memory stores a computer program, and when the processor executes the computer program, the following steps are implemented: Multiple nodes use TDMA protocol to form a distributed network at the initial working frequency to form a wireless ad hoc network; The TDMA time slots of the MAC layer of the wireless ad hoc network are divided into control time slots using narrowband waveforms and service time slots using wideband waveforms, and the wideband waveform and narrowband waveform are merged using the TD-FDMA protocol to achieve anti-interference of the wireless ad hoc network based on the wide-narrowband fusion waveform; Among them, in the control time slot, the TDMA protocol is adopted and the narrowband frequency hopping waveform is used to maintain the wireless ad hoc network and transmit ultra-high priority narrowband services; in the service time slot, the FDMA protocol is adopted and the broadband adaptive frequency selection waveform is used to transmit broadband services.

[0015] The above-mentioned wireless ad hoc network anti-interference method, device and equipment based on wide- and narrow-band waveforms have the following technical effects compared with the prior art: 1. A TD-FDMA protocol (Time Division-Frequency Division Multiple Access) is provided. This protocol combines broadband waveform and narrowband waveform by combining time division multiple access and frequency division multiple access technologies. While improving the receiving sensitivity and anti-interference ability of the wireless ad hoc network, it will not affect the transmission rate of the new broadband business.

[0016] 2. By defining fixed control time slots and using narrowband frequency hopping waveforms to maintain unlimited self-organizing networks and transmit ultra-high priority narrowband services, the stability and anti-interference of the network can be greatly improved, and the most important information in narrowband services can be transmitted first, ensuring the reliability of information. In addition, by using broadband adaptive frequency selection waveforms to transmit broadband services through other service time slots, the efficiency and anti-interference of broadband service transmission can be guaranteed, and at the same time, the service bandwidth can be ensured not to be significantly reduced due to the number of networking nodes, which greatly reduces the communication overhead of unlimited self-organizing networks and improves the networking scale and network effectiveness.

[0017] 3. The narrowband waveform of the control time slot works in the frequency hopping mode. In the control time slot, the working frequency of all nodes is the same at the same time, which can shorten the convergence time of the network automatic frequency hopping, and can also achieve various forms of anti-interference, improving the transmission reliability of important information; the broadband waveform in the service time slot works in the multi-concurrency multi-frequency point adaptive frequency selection mode. In the service time slot, the transmitting working frequency and the receiving working frequency of different nodes at the same time are different, which improves the multi-node concurrency capability of the wireless ad hoc network and has strong anti-interference. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 A schematic diagram of a flow chart of a wireless ad hoc network anti-interference method based on wide- and narrow-band waveforms in one embodiment; Figure 2 A schematic diagram of time slot division in one embodiment; Figure 3 A schematic diagram of the data format of a service time slot in an embodiment; Figure 4 FIG. 4 is a diagram showing the internal structure of a computer device in one embodiment. DETAILED DESCRIPTION

[0019] In order to make the purpose, technical solution and advantages of the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0020] In one embodiment, Figure 1 As shown, a wireless ad hoc network anti-interference method based on wide-narrowband waveform is provided, comprising the following steps: Step S1, multiple nodes use the TDMA protocol to perform distributed networking at an initial working frequency to form a wireless ad hoc network.

[0021] Among them, TDMA (Time Division Multiple Access) is a method for implementing shared transmission media (usually radio A communication technology that allows multiple users to communicate in different time slices ( Time slot ) to use the same frequency .

[0022] Step S2, divide the TDMA time slot of the wireless ad hoc network MAC layer into a control time slot that uses a narrowband waveform and a service time slot that uses a broadband waveform, and use the TD-FDMA protocol to fuse the broadband waveform and the narrowband waveform to achieve wireless ad hoc network anti-interference based on a broadband and narrowband fusion waveform; wherein, in the control time slot, the TDMA protocol is used and a narrowband frequency hopping waveform is used to maintain the wireless ad hoc network and transmit ultra-high priority narrowband services; in the service time slot, the FDMA protocol is used and a broadband adaptive frequency selection waveform is used to transmit broadband services.

[0023] The MAC layer, also known as the media access control layer, is used to provide addressing and media access control methods so that different devices or nodes on the network can communicate on a multi-point network without conflicting with each other.

[0024] The TD-FDMA protocol combines broadband and narrowband waveforms by combining time division multiple access and frequency division multiple access technologies. Frequency division multiple access (FDMA) is a multiple access technology that divides the carrier bandwidth into different frequency channels, each of which can transmit one signal in parallel.

[0025] In one embodiment, the wireless ad hoc network MAC layer TDMA time slot is divided into a control time slot using a narrowband waveform and a service time slot using a broadband waveform, including: Any one of the TDMA time slots is selected as a control time slot using a narrowband waveform, and the other time slots are selected as service time slots using a wideband waveform.

[0026] Specifically, Figure 2 As shown, time slot 0 is used as a control time slot, and a narrowband frequency hopping waveform is used, which is mainly used to maintain wireless ad hoc network access, network exit, and exchange full network synchronization information. Time slots 1 to n are used as service time slots, and a broadband adaptive frequency selection waveform is used for broadband service transmission.

[0027] In one embodiment, if Figure 3 As shown, the data format of the service time slot consists of a source address, a destination address, transmission frequency information and a spectrum sensing instruction.

[0028] In one embodiment, the method further comprises: For any node in the wireless ad hoc network, in the transmitting time slot of the node's business time slot, the physical layer modifies the node's air interface operating frequency by parsing the transmitting frequency information; in the receiving time slot of the node's business time slot, the physical layer performs full-channel noise floor perception by parsing the spectrum sensing instructions, and forms the optimal frequency set of the node based on the perception results, and further informs other nodes in the wireless ad hoc network of the optimal frequency set of the node by controlling the narrowband frequency hopping waveform used in the time slot based on the source address and target address of the communication.

[0029] The optimal frequency set consists of the optimal frequencies at which several other nodes receive information from the node, as shown in Table 1: Table 1 Optimal frequency set

[0030] In one embodiment, the narrowband waveform of the control time slot operates in a frequency hopping mode. In the control time slot, all nodes operate at the same frequency at the same time.

[0031] In one of the embodiments, the broadband waveform of the service time slot operates in a multi-concurrent multi-frequency point adaptive frequency selection mode. In the service time slot, the transmitting working frequency and the receiving working frequency of different nodes at the same time are different.

[0032] According to the above method, by adopting the TD-FDMA protocol to merge the broadband waveform and the narrowband waveform, the receiving sensitivity and anti-interference of the wireless ad hoc network are improved, while the transmission rate of the new broadband service is not affected. At the same time, the control time slot adopts a narrowband frequency hopping waveform to transmit networking information and high-priority information, which can greatly improve the stability and anti-interference of the network, and ensure that the most important information is transmitted first, ensuring the reliability of information. The service time slot adopts a broadband adaptive frequency selection waveform, combined with a spectrum sensing algorithm, to form an optimal frequency set, and inform other nodes of the best frequency to receive. When the node transmits the time slot, according to the destination address to be communicated, the optimal frequency is selected for information transmission, which greatly improves the anti-interference of the broadband service waveform, and does not affect the service transmission efficiency. At the same time, it can also ensure that the service bandwidth will not be greatly reduced due to the number of networking nodes, greatly reducing the communication overhead of the unlimited ad hoc network, and improving the networking scale and network effectiveness.

[0033] It should be understood that although Figure 1 The steps in the flowchart are shown in sequence as indicated by the arrows, but these steps are not necessarily executed in the order indicated by the arrows. Unless otherwise specified in this document, there is no strict order restriction for the execution of these steps, and these steps can be executed in other orders. Moreover, Figure 1At least part of the steps may include multiple sub-steps or multiple stages. These sub-steps or stages are not necessarily executed at the same time, but can be executed at different times. The execution order of these sub-steps or stages is not necessarily sequential, but can be executed in turn or alternately with other steps or at least part of the sub-steps or stages of other steps.

[0034] In one embodiment, a wireless ad hoc network anti-interference device based on wide- and narrow-band waveforms is provided, comprising: A network building module is used for multiple nodes to form a distributed network using the TDMA protocol at the initial working frequency to form a wireless ad hoc network; The anti-interference module is used to divide the TDMA time slot of the wireless ad hoc network MAC layer into a control time slot using a narrowband waveform and a service time slot using a broadband waveform, and adopt the TD-FDMA protocol to fuse the broadband waveform and the narrowband waveform to achieve wireless ad hoc network anti-interference based on the broadband and narrowband fusion waveform; wherein, in the control time slot, the TDMA protocol is adopted and the narrowband frequency hopping waveform is used to maintain the wireless ad hoc network and transmit ultra-high priority narrowband services; in the service time slot, the FDMA protocol is adopted and the broadband adaptive frequency selection waveform is used to transmit broadband services.

[0035] The specific definition of the wireless ad hoc network anti-interference device based on wide-narrowband waveform can be referred to the definition of the wireless ad hoc network anti-interference method based on wide-narrowband waveform in the above text, which will not be repeated here. Each module in the above-mentioned wireless ad hoc network anti-interference device based on wide-narrowband waveform can be implemented in whole or in part by software, hardware and a combination thereof. Each of the above-mentioned modules can be embedded in or independent of the processor in the computer device in the form of hardware, or can be stored in the memory in the computer device in the form of software, so that the processor can call and execute the operations corresponding to each of the above modules.

[0036] In one embodiment, a computer device is provided. The computer device may be a terminal, and its internal structure diagram may be as follows: Figure 4As shown. The computer device includes a processor, a memory, a network interface, a display screen and an input device connected through a system bus. Among them, the processor of the computer device is used to provide computing and control capabilities. The memory of the computer device includes a non-volatile storage medium and an internal memory. The non-volatile storage medium stores an operating system and a computer program. The internal memory provides an environment for the operation of the operating system and the computer program in the non-volatile storage medium. The network interface of the computer device is used to communicate with an external terminal through a network connection. When the computer program is executed by the processor, a wireless ad hoc network anti-interference method based on wide- and narrow-band waveforms is implemented. The display screen of the computer device can be a liquid crystal display screen or an electronic ink display screen, and the input device of the computer device can be a touch layer covered on the display screen, or a key, trackball or touchpad set on the computer device housing, or an external keyboard, touchpad or mouse, etc.

[0037] Those skilled in the art will understand that Figure 4 The structure shown in the figure is only a block diagram of a part of the structure related to the solution of the present application, and does not constitute a limitation on the computer device to which the solution of the present application is applied. The specific computer device may include more or fewer components than those shown in the figure, or combine certain components, or have a different arrangement of components.

[0038] In one embodiment, a computer device is provided, including a memory and a processor, wherein the memory stores a computer program, and when the processor executes the computer program, the following steps are implemented: Multiple nodes use TDMA protocol to form a distributed network at the initial working frequency to form a wireless ad hoc network; The TDMA time slots of the MAC layer of the wireless ad hoc network are divided into control time slots using narrowband waveforms and service time slots using wideband waveforms, and the wideband waveform and narrowband waveform are merged using the TD-FDMA protocol to achieve anti-interference of the wireless ad hoc network based on the wide-narrowband fusion waveform; Among them, in the control time slot, the TDMA protocol is adopted and the narrowband frequency hopping waveform is used to maintain the wireless ad hoc network and transmit ultra-high priority narrowband services; in the service time slot, the FDMA protocol is adopted and the broadband adaptive frequency selection waveform is used to transmit broadband services.

[0039] The technical features of the above embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0040] The above-described embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the present application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the present application shall be subject to the attached claims.

Claims

1. A wireless ad hoc network anti-interference method based on wide- and narrow-band waveforms, characterized in that: The method comprises: Multiple nodes use TDMA protocol to form a distributed network at the initial working frequency to form a wireless ad hoc network; The TDMA time slots of the MAC layer of the wireless ad hoc network are divided into control time slots using narrowband waveforms and service time slots using wideband waveforms, and the wideband waveform and narrowband waveform are merged using the TD-FDMA protocol to achieve anti-interference of the wireless ad hoc network based on the wide-narrowband fusion waveform; Among them, in the control time slot, the TDMA protocol is adopted and the narrowband frequency hopping waveform is used to maintain the wireless ad hoc network and transmit ultra-high priority narrowband services; in the service time slot, the FDMA protocol is adopted and the broadband adaptive frequency selection waveform is used to transmit broadband services.

2. The method according to claim 1, characterized in that The TDMA time slots of the wireless ad hoc network MAC layer are divided into control time slots using narrowband waveforms and service time slots using broadband waveforms, including: Any one of the TDMA time slots is selected as a control time slot using a narrowband waveform, and the other time slots are selected as service time slots using a wideband waveform.

3. The method according to claim 1 or 2, characterized in that: The data format of the service time slot consists of a source address, a destination address, transmission frequency information and a spectrum sensing instruction.

4. The method according to claim 3, characterized in that The method further comprises: For any node in the wireless ad hoc network, in the transmitting time slot in the service time slot of the node, the physical layer modifies the node air interface operating frequency by parsing the transmitting frequency information; in the receiving time slot in the service time slot of the node, the physical layer performs full channel noise floor perception by parsing the spectrum sensing instruction, and forms an optimal frequency set for the node based on the perception result, and further informs the other nodes in the wireless ad hoc network of the optimal frequency set of the node through the narrowband frequency hopping waveform adopted in the control time slot based on the source address and target address of the communication; wherein the optimal frequency set is composed of the optimal frequencies at which several other nodes receive the node information.

5. The method according to claim 1, characterized in that The narrowband waveform of the control time slot operates in a frequency hopping mode. In the control time slot, all nodes have the same operating frequency at the same time.

6. The method according to claim 1, characterized in that The broadband waveform of the service time slot operates in a multi-concurrent multi-frequency point adaptive frequency selection mode. In the service time slot, the transmitting working frequency and the receiving working frequency of different nodes at the same time are different.

7. A wireless ad hoc network anti-interference device based on wide-narrowband waveform, characterized in that: The device comprises: A network building module is used for multiple nodes to form a distributed network using the TDMA protocol at the initial working frequency to form a wireless ad hoc network; The anti-interference module is used to divide the TDMA time slot of the wireless ad hoc network MAC layer into a control time slot using a narrowband waveform and a service time slot using a broadband waveform, and adopt the TD-FDMA protocol to fuse the broadband waveform and the narrowband waveform to achieve wireless ad hoc network anti-interference based on the broadband and narrowband fusion waveform; wherein, in the control time slot, the TDMA protocol is adopted and the narrowband frequency hopping waveform is used to maintain the wireless ad hoc network and transmit ultra-high priority narrowband services; in the service time slot, the FDMA protocol is adopted and the broadband adaptive frequency selection waveform is used to transmit broadband services.

8. A computer device comprising a memory and a processor, wherein the memory stores a computer program, wherein: When the processor executes the computer program, the steps of the method according to any one of claims 1 to 6 are implemented.

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