Dynamic environment self-adaptive relay blocking network communication system and scheduling method thereof

Abstract

The invention relates to a dynamic environment self-adaptive relay blocking network communication system and a scheduling method thereof, the system comprises a plurality of mobile nodes, and the mobile nodes have wireless communication capability and can autonomously establish communication connection with other nodes to form a self-organizing network; a plurality of controlled interception areas, wherein the mobile nodes in each controlled interception area realize data transmission through a time division multiple access scheduling strategy; a physical layer waveform and signal processing module; and a scheduling strategy module. The scheduling method comprises the following steps: dynamically dividing a network into a plurality of controlled interception areas, and implementing time division multiple access scheduling in each controlled interception area; redundant transmission is realized through multi-node cooperative communication, and cooperative diversity is constructed; selecting an automatic retransmission request-free mechanism or an automatic retransmission request mechanism according to the real-time network state so as to balance reliability and time delay; and multipath fading and signal collision are suppressed by using a physical layer waveform and signal processing technology. The method has the advantages of being short in access time, high in expansibility and high in reliability and stability.

Description

Technical Field

[0001] The present invention relates to the field of wireless communication systems, and particularly relates to a dynamic environment adaptive anti-relay network communication system and its scheduling method. Background Art

[0002] In the field of modern wireless communication, multipath fading of signals and signal collisions are the main factors leading to the degradation of communication quality. These problems are particularly prominent in dynamically changing environments, such as urban environments, battlefield environments, etc. There are numerous electromagnetic interference sources in these environments, and the signal propagation paths are complex, making it difficult for traditional wireless communication technologies to ensure the stability and reliability of communication. Traditional wireless networks mainly rely on fixed routing protocols and IP addresses, such as OSPF, RIP, etc. These protocols perform well in static network environments, but in dynamically changing wireless environments, their performance will be greatly reduced. In these networks, problems such as packet collisions, hidden terminals, and exposed terminals are widespread. These problems not only reduce communication efficiency but also increase resource consumption. In addition, when faced with rapidly changing network topologies, these networks often have difficulty adapting quickly, resulting in communication interruptions and data loss.

[0003] To address the problems of multipath fading and signal collisions, researchers have proposed various technologies, such as RAKE receivers, multiple-input multiple-output (MIMO) technologies, space-time coding (STC), etc. These technologies have improved the robustness of signals to a certain extent, but they often require complex hardware support and high computational overhead. Cognitive radio technology improves spectrum utilization through dynamic spectrum access and spectrum sensing, but its main focus is on the efficient utilization of the spectrum rather than directly enhancing the anti-interference performance of communication.

[0004] In addition, self-organizing networks (such as MANETs) can dynamically establish and maintain network connections without fixed infrastructure and improve the network's anti-interference performance. However, their routing protocols often respond slowly when faced with rapidly changing network topologies, resulting in low communication efficiency. For example, existing self-organizing networks based on cooperative communication improve the robustness of signals through cooperation between nodes, and use redundant transmissions of nodes to construct cooperative diversity, thereby improving the anti-interference ability of signals to a certain extent. However, these solutions often require complex cooperation strategies and synchronization mechanisms, and face many challenges in practical applications, such as the selection of cooperative nodes, the synchronization of cooperative signals, and the energy consumption problem during the cooperation process. Some other studies have proposed wireless network optimization technologies based on artificial intelligence and machine learning. These technologies dynamically adjust network parameters by learning the historical data and environmental characteristics of the network to improve the performance of the network. However, these technologies usually require a large amount of training data and computing resources, and have limitations in terms of real-time and dynamic performance.

[0005] To this end, the present invention proposes a dynamic environment adaptive barrage relay network communication system and its scheduling method, which is applicable to the adversarial radio environment and provides reliable performance. Summary of the Invention

[0006] Aiming at problems faced by traditional wireless networks in a dynamic environment, such as signal multipath fading, signal collision, packet conflict, hidden terminal, exposed terminal, etc., based on the barrage relay network (abbreviated as BRN), the present invention proposes a dynamic environment adaptive barrage relay network communication system and its scheduling method to adapt to the rapidly changing wireless environment and improve the stability and reliability of communication. By establishing a controlled blocking region (CBR) and using time division multiple access (TDMA) scheduling and multi-node cooperative communication technology, efficient data transmission in a dynamic environment is achieved. The specific technical solutions are as follows: A dynamic environment adaptive barrage relay network communication system includes: Multiple mobile nodes, which have wireless communication capabilities and can autonomously establish communication connections with other nodes to form an ad hoc network; Multiple controlled blocking regions, which divide the network into multiple independently communicating controlled blocking regions through an algorithm, and the mobile nodes within each controlled blocking region achieve data transmission through a time division multiple access scheduling strategy; A multi-node cooperative communication mechanism, which constructs cooperative diversity using redundant transmission to improve signal robustness; A physical layer waveform and signal processing module, which executes physical layer waveform and signal processing technologies to achieve self-consistent cooperative communication; A scheduling strategy module, which includes two mechanisms: no automatic repeat request and automatic repeat request, and dynamically selects according to the network state and communication requirements.

[0007] Furthermore, the division of the controlled blocking region is based on the dynamic network topology, and the size and period of the controlled blocking region are adjusted through an algorithm to adapt to network load and topology changes.

[0008] Furthermore, within the controlled blocking region, the nodes are divided into source nodes, destination nodes, intermediate relay nodes, and blocking nodes; among them, the relay nodes are used for cross-region data transmission; the blocking nodes are used to suppress redundant data packets to reduce network congestion.

[0009] Furthermore, the physical layer waveform and signal processing technologies include constant envelope detection, frequency hopping, modern error correction codes, maximum likelihood sequence estimation equalization, iterative detection, and phase jitter; the modern error correction codes are LDPC codes or Turbo codes.

[0010] Furthermore, when the scheduling strategy module adopts the automatic repeat request mechanism, the cycle period and redundancy parameters of the barrage relay network are adjusted through a feedback method.

[0011] A dynamic environment adaptive relay network scheduling method, based on the above system, includes the following steps: Dynamically divide the network into multiple controlled interception areas, and implement time division multiple access (TDMA) scheduling within each controlled interception area; Achieve redundant transmission through multi-node cooperative communication to construct cooperative diversity; Select either the no automatic repeat request (ARQ) or the automatic repeat request mechanism according to the real-time network status to balance reliability and latency; Utilize physical layer waveform and signal processing technologies to suppress multipath fading and signal collisions.

[0012] Furthermore, the specific steps of the time division multiple access scheduling are as follows: The source node broadcasts a request to send (RTS) control frame; After receiving the RTS control frame, the intermediate node determines and updates the node function according to the preset rules, and forwards the RTS control frame to the destination node; After receiving the RTS control frame, the destination node broadcasts a clear to send (CTS) control frame; After receiving the CTS control frame, the intermediate node updates and broadcasts the CTS control frame; After receiving the CTS control frame, the intermediate node and the source node stop sending.

[0013] Furthermore, the automatic repeat request mechanism is as follows: The sending node waits for the confirmation from the receiving node; When the sending node does not receive the confirmation from the receiving node, it automatically retransmits the data packet, and optimizes the relay network parameters based on the retransmission statistics.

[0014] The beneficial effects of the present invention are as follows: 1. The basic building block of the relay network is not a point-to-point wireless link, but a fast and robust broadcast mechanism. This mechanism adopts an autonomous cooperative communication scheme, which improves the robustness and adaptability of communication by establishing temporary and dynamic connections between nodes, and has the characteristics of short access time, strong scalability, high reliability and stability.

[0015] 2. Utilize the suppress-and-forward function of some nodes to divide the network into several independent communication areas, and realize effective data transmission through the flooding algorithm within the independent areas. By establishing controlled interception areas, within these areas, data is broadcast from the sending node to the destination node through synchronous time division multiple access scheduling and multi-node cooperative communication, realizing point-to-point communication. It is applicable to the radio environment, not afraid of single link interruption, can bypass, the network can self-heal, and is more reliable. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0017] Figure 1 It is the working flowchart of each node in the controlled interception area described in the present invention; Figure 2 It is the schematic diagram of the division of labor of each node in the controlled interception area described in the present invention. Specific embodiments

[0018] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus cannot be understood as a limitation to the present invention. In addition, the terms "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, the features defined with "first", "second", etc. may explicitly or implicitly include one or more of such features. In the description of the present invention, unless otherwise specified, the meaning of "a plurality" is two or more.

[0019] It should be noted that the Barrage Relay Network (BRN) is a multi-hop mobile ad hoc network routing protocol designed specifically for tactical edge communication requirements. The present invention provides the following specific implementation schemes: In a first aspect, the present invention provides a dynamic environment adaptive Barrage Relay Network (BRN) communication system, which includes rapid deployment, high reliability, and anti-interference capabilities. The system consists of multiple mobile nodes, which can be radio devices carried by soldiers or other battlefield communication devices. The mobile nodes have wireless communication capabilities and can autonomously establish communication connections with other nodes to form an ad-hoc network. The BRN realizes effective data transmission within the area by establishing Controlled Barrage Regions (CBRs). Within each CBR, the nodes perform data transmission according to the Time Division Multiple Access (TDMA) scheduling strategy, effectively avoiding signal collisions and interference. A multi-node cooperative communication mechanism is constructed, and cooperative diversity is constructed using redundant transmission to improve signal robustness. At the physical layer, the BRN can implement a series of robust physical layer waveform and signal processing technologies for radio signal multipath fading and signal collisions through cooperative combining processing of signals, including constant envelope detection, frequency hopping, modern error correction codes, maximum likelihood sequence estimation equalization, iterative detection, phase jitter, etc., thus realizing autonomous cooperative communication (ACC). The scheduling strategies in the BRN include two mechanisms: No Automatic Repeat reQuest (NO-ARQ) and Automatic Repeat reQuest (ARQ), and these two mechanisms can be flexibly selected according to network conditions and communication requirements to optimize network performance.

[0020] Furthermore, the establishment of the CBR is based on the dynamic topology of the network, and the network is dynamically divided into multiple independent communication areas through an algorithm.

[0021] Furthermore, as Figure 1-2As shown in the figure, within the CBR, the functions of nodes can be diverse. Nodes are divided into source nodes, destination nodes, intermediate forwarding nodes, and blocking nodes. Source nodes and destination nodes perform relay transmission through intermediate nodes. Source nodes periodically broadcast request to send (RTS) control frames. Intermediate nodes determine node functions according to the set formula rules, update and then broadcast the RTS control frames until they reach the destination node. After receiving the RTS control frame, the destination node broadcasts a clear to send (CTS) control frame. Intermediate nodes update and broadcast the CTS control frame after receiving it. Intermediate nodes and source nodes stop sending after receiving the CTS. Among them, relay forwarding nodes are responsible for transmitting data packets from one area to another to ensure that data can reach the destination smoothly; blocking nodes are used to suppress data packets that do not need to continue spreading to reduce network congestion and unnecessary energy consumption. The intelligence of CBR lies in its dynamic adjustment ability. Each node in the network can autonomously adjust its behavior according to the real-time network state and transmission requirements. For example, when the network load is high, CBR can expand its buffer area to disperse the data stream; when the network load is low, CBR can narrow its scope to improve transmission efficiency. In addition, the design of CBRs also considers network security and reliability. By implementing strict data packet filtering and transmission control mechanisms within CBR, the spread of malicious data packets can be effectively prevented, protecting the network from attacks. At the same time, CBR can also quickly reroute data packets in the event of node failures or link interruptions to ensure the continuity and stability of data transmission.

[0022] Furthermore, the physical layer waveform and signal processing technologies of BRN include constant envelope detection, frequency hopping, modern error correction codes, maximum likelihood sequence estimation equalization, iterative detection, phase jitter, etc.; Among them, constant envelope detection: By keeping the envelope of the signal constant, it reduces interference caused by signal changes and improves the transmission efficiency of the signal.

[0023] Frequency hopping: By quickly switching between multiple frequencies, it reduces the interference that may be suffered by staying on a single frequency for a long time and improves the anti-interference ability of the signal.

[0024] Modern error correction codes: Adopt advanced error correction coding technologies, such as low-density parity-check (LDPC) codes or Turbo codes, to improve the reliability of data transmission.

[0025] Maximum likelihood sequence estimation equalization: By estimating the propagation path of the signal in a multipath environment, the signal is equalized to improve the demodulation quality of the signal.

[0026] Iterative detection: By using iterative algorithms to detect and decode the signal, it improves the detection accuracy of the signal.

[0027] Phase jitter: By introducing random jitter in the phase of the signal, the mutual interference between signals is reduced, and the transmission quality of the signal is improved.

[0028] In ACC, when several data packets carrying the same data arrive at a certain receiving point simultaneously, these data packets not only do not conflict or interfere with each other, but also form cooperative diversity with each other, improving the probability of correct decoding and message reconstruction. Therefore, the blocking relay network avoids problems such as packet conflicts, hidden terminals, and exposed terminals in traditional wireless networks, saving the resource consumption for solving these problems.

[0029] Furthermore, in the NO-ARQ strategy, the node does not wait for the receiver's acknowledgment (ACK) after sending a data packet. If the data packet is lost or damaged during transmission, the sender does not automatically retransmit the data packet. This strategy is suitable for scenarios with low requirements for latency, which can reduce the communication overhead of the network, but may reduce the reliability of data transmission. The ARQ strategy requires the sender to wait for the receiver's acknowledgment after sending a data packet. If the sender does not receive an acknowledgment within a certain time, it will consider that the data packet is lost or damaged during transmission and will automatically retransmit the data packet. The ARQ strategy can improve the reliability of data transmission, but may increase the latency because it needs to wait for acknowledgment or retransmission. In BRN, these two strategies can be flexibly selected according to network conditions and communication requirements to optimize network performance.

[0030] In a second aspect, the present invention provides a dynamic environment adaptive blocking relay network scheduling method. Based on the above system, it includes the following steps: dynamically dividing the network into multiple controlled interception areas and implementing time division multiple access scheduling within each controlled interception area; realizing redundant transmission through multi-node cooperative communication to construct cooperative diversity; selecting the no automatic repeat request or automatic repeat request mechanism according to the real-time network state to balance reliability and latency; using physical layer waveform and signal processing technologies to suppress multipath fading and signal collisions.

[0031] In this solution, the network is dynamically divided into multiple independent communication areas, namely Controlled Intercept Regions (CBRs). Inside each region, orderly data transmission is achieved through Time Division Multiple Access (TDMA) scheduling, effectively reducing signal collisions and interference. Meanwhile, through multi-node cooperative communication technology, cooperative diversity is constructed by means of redundant transmissions between nodes to improve the robustness of signals and enhance the anti-interference ability of the network. In addition, the system can dynamically adjust the size and period of the Controlled Intercept Region (CBR) and the scheduling strategy of Time Division Multiple Access (TDMA) according to changes in the network environment and communication requirements to adapt to the rapid changes in network topology. This self-adaptability enables the BRN to flexibly respond to emergencies in the battlefield environment and maintain the continuity and stability of communication. The BRN does not rely on traditional IP addresses and gateways, reducing the complexity of network configuration and dependence on infrastructure, simplifying network deployment and maintenance, and enabling the BRN to be quickly deployed anywhere needed, especially in battlefield environments lacking infrastructure. In addition, a series of physical layer waveform and signal processing technologies are utilized, such as constant envelope detection, frequency hopping, modern error correction codes, maximum likelihood sequence estimation equalization, iterative detection, and phase jitter, etc., to improve the anti-multipath fading ability of signals. The application of these technologies enhances the penetration and stability of signals in complex environments, reducing signal loss and interference. The Autonomous Cooperative Communication (ACC) mechanism allows that when multiple data packets carrying the same data arrive at the receiving point simultaneously, these data packets not only do not conflict but instead form cooperative diversity, improving the decoding correctness rate and message reconstruction probability. This mechanism enables the BRN to maintain efficient data transmission and high reliability in the face of signal interference and collisions. Through the comprehensive application of these technologies, the present invention can achieve fast, robust, and scalable multicast tactical Internet communication in a dynamic environment, effectively solving the challenges faced by traditional wireless networks in a dynamic environment and providing a new solution for battlefield communication. The design of this system takes into account the special requirements of the battlefield environment, including rapid deployment, high reliability, and anti-interference ability, making it an ideal choice for modern tactical communication.

[0032] The above has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. What is described in the above embodiments and the specification only illustrates the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of the present invention claimed. For example, adjusting the scheduling strategy in the BRN system, such as switching between NO-ARQ and ARQ to adapt to different communication scenarios and performance requirements. Alternative solutions may involve using different error correction coding techniques, or adjusting the TDMA scheduling algorithm to optimize the network throughput and latency. In addition, the application of BRN technology is not limited to the military battlefield environment and can also be extended to civilian fields, such as emergency rescue, disaster response, and other scenarios that require rapid deployment and high-reliability communication. These design changes and alternative solutions make the BRN system more flexible and capable of adapting to a wide range of application requirements.

Claims

1. A dynamic environment adaptive relay network communication system, characterized in that: include: Multiple mobile nodes, each of which has wireless communication capabilities and can autonomously establish communication connections with other nodes to form a self-organizing network; Multiple controlled interception areas: The network is dynamically divided into multiple controlled interception areas for independent communication through algorithms. Mobile nodes in each controlled interception area realize data transmission through time division multiple access scheduling strategy. Multi-node cooperative communication mechanism, using redundant transmission to build cooperative diversity to improve signal robustness; Physical layer waveform and signal processing module, which implements physical layer waveform and signal processing technology to achieve self-consistent cooperative communication; The scheduling strategy module includes two mechanisms: no automatic retransmission request and automatic retransmission request, which are dynamically selected according to the network status and communication requirements.

2. A dynamic environment adaptive relay network communication system according to claim 1, characterized in that: The division of controlled interception areas is based on the dynamic network topology, and the size and period of the controlled interception areas are adjusted through algorithms to adapt to changes in network load and topology.

3. A dynamic environment adaptive relay network communication system according to claim 1, characterized in that: In the controlled interception area, the nodes are divided into source nodes, destination nodes, intermediate forwarding nodes and blocking nodes; among them, relay forwarding nodes are used for cross-regional data transmission; blocking nodes are used to suppress redundant data packets to reduce network congestion.

4. A dynamic environment adaptive relay network communication system according to claim 1, characterized in that: Physical layer waveform and signal processing technologies include constant envelope detection, frequency hopping, modern error correction codes, maximum likelihood sequence estimation equalization, iterative detection, and phase jitter; modern error correction codes are LDPC codes or Turbo codes.

5. The dynamic environment adaptive relay network communication system according to claim 1, characterized in that: When the scheduling strategy module adopts the automatic retransmission request mechanism, the cycle period and redundancy parameters of the relay network are adjusted through feedback.

6. A dynamic environment adaptive relay network scheduling method, based on the dynamic environment adaptive relay network communication system according to any one of claims 1 to 5, characterized in that: The following steps are involved: Dynamically divide the network into multiple controlled interception areas and implement time division multiple access scheduling in each controlled interception area; Redundant transmission is achieved through multi-node cooperative communication to build cooperative diversity; Choose no automatic retransmission request or automatic retransmission request mechanism according to the real-time network status to balance reliability and latency; Physical layer waveform and signal processing technology are used to suppress multipath fading and signal collision.

7. A dynamic environment adaptive relay network scheduling method according to claim 6, characterized in that: The specific steps of time division multiple access scheduling are as follows: The source node broadcasts a request to send an RTS control frame; After receiving the RTS control frame, the intermediate node determines the node function and updates it according to the preset rules, and forwards the RTS control frame to the destination node; After receiving the RTS control frame, the destination node broadcasts a clear-to-send CTS control frame; After receiving the CTS control frame, the intermediate node updates and broadcasts the CTS control frame; After receiving the CTS control frame, the intermediate node and the source node stop sending.

8. A dynamic environment adaptive relay network scheduling method according to claim 6, characterized in that: The automatic retransmission request mechanism is as follows: The sending node waits for confirmation from the receiving node; The sending node automatically retransmits the data packet when it does not receive confirmation from the receiving node, and optimizes the relay network parameters based on the retransmission calculation.

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