A communication access method and system based on a VDES system

By adjusting the number of transmissions using the signal-to-noise-interference ratio (SINR) and a recursive formula, the problems of low channel utilization and interference in the VDES system were solved, achieving efficient and reliable communication access and enhancing the system's robustness and throughput.

CN116192336BActive Publication Date: 2026-07-21SHANGHAI SPACEFLIGHT INST OF TT&C & TELECOMM
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
SHANGHAI SPACEFLIGHT INST OF TT&C & TELECOMM
Filing Date
2023-03-07
Publication Date
2026-07-21

AI Technical Summary

Technical Problem

The existing VDES technical standard fails to maximize the use of channel resources and does not take into account factors such as the transmit power of LinkID and differences in channel quality, resulting in low channel utilization. Furthermore, in actual VDES communication systems, there are unknown interferences and differences in channel quality, making it difficult to guarantee stable message transmission.

Method used

By detecting the signal-to-noise-interference ratio (SINR) at the receiving end, the control center infers the appropriate service link number (LinkID) based on a recursive formula. The transmitting end adjusts the number of single-frame transmissions to meet the frame rate requirements, enabling flexible transmission of repeated frames and abandoning or terminating communication that does not meet the conditions.

Benefits of technology

This improved the throughput and robustness of the VDES system, enhanced the effective access of terminal devices, and improved the system's reliability and channel utilization.

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Abstract

The application relates to the technical field of communication access, and provides a communication access method based on a VDES system, which comprises the following steps: P1: a receiving end detects a signal-to-noise interference ratio (SINR) value of a signaling link number (LinkID) signal transmitted by a transmitting end, and judges whether the signal-to-noise interference ratio (SINR) value meets a preset communication condition; P2: a control center deduces whether there is a suitable service link number (LinkID) for data interaction according to the signal-to-noise interference ratio (SINR) value of the signaling link number (LinkID) and a preset recursive formula; and P3: in the data interaction process, the transmitting end adjusts the number of single frame transmissions according to a receiving mask sent by the receiving end using the signaling link number (LinkID), so that the current frame rate of the receiving end is greater than or equal to a preset minimum frame rate; when any one of the conditions in P1, P2 and P3 does not meet the condition, the receiving end and the transmitting end give up or terminate the current communication. The application is used for efficient access of the control center and terminal equipment in the VDE-SAT and VDE-TER systems, improves the system throughput, and enhances the robustness of the system.
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Description

Technical Field

[0001] This invention relates to the technical field of communication access, and in particular to a communication access method and system based on the VDES system. Background Technology

[0002] VDES (VHF Data Exchange System) is an enhanced and upgraded version of the Automatic Identification System (AIS) for maritime mobile services. It was proposed after the 2012 World Radiocommunication Conference (WRC-12) of the International Telecommunication Union (ITU) and finalized at the 2015 World Radiocommunication Conference (WRC-15) by 162 member states and 136 international organizations and groups. Building upon the AIS system, VDES adds ASM and VDE communication systems (including VDE-TER (VDE-terrestrial) and VDE-SAT (VDE-satellite) systems), enabling data exchange between ships, between ships and shore, and between ships and satellites, providing a feasible solution for future global maritime interoperability.

[0003] The star network architecture VDE communication system adopts a time-division and frequency-division synchronous access system, enabling the central node to control the number of users and channel parameters, thus fully realizing the controllable use of channel resources and avoiding problems such as channel congestion and user conflict interference. The VDES technical standard is defined in the IALA G1139 / ITU-R M.2092.1 standard document. However, in the existing standard, the following problems still exist regarding user access: (1) Although the VDES technical standard defines that users select the corresponding LinkID according to the channel quality indication, it does not take into account the influence of factors such as the transmit power of different LinkIDs, channel quality, and differences in channel quality, and thus fails to maximize the utilization of the channel.

[0004] (2) There are unknown interferences in the actual VDES communication system. In addition, the satellite coverage is wide and the channel quality varies even more in different areas. In the process of uplink and downlink addressing service interaction, if a flexible repetition frame transmission mode is not adopted, it is difficult to ensure stable message transmission under the condition of a unified limited number of retransmissions. Summary of the Invention

[0005] To address the aforementioned problems, the present invention aims to provide a communication access method and system based on the VDES system, for efficient access to addressing services of control centers, including shore stations, satellites, and concentrator terminals, as well as terminal equipment, including shipborne terminals, rescue terminals, and handheld terminals, in VDE-SAT and VDE-TER systems, thereby improving system throughput and enhancing system robustness.

[0006] The above-mentioned objective of this invention is achieved through the following technical solutions: A communication access method based on a VDES system includes: P1: The receiver detects the signal-to-noise-interference ratio (SINR) of the signaling link number LinkID transmitted by the transmitter and determines whether the SINR meets the preset communication conditions. P2: The control center infers whether there is a suitable service link ID for data interaction based on the signal-to-noise-interference ratio (SINR) value of the signaling link ID and the preset recursive formula. P3: During data interaction, the transmitting end adjusts the number of times a single frame is sent according to the receiving mask sent by the receiving end using the signaling link number LinkID, so that the current frame resolution rate of the receiving end is greater than or equal to the preset minimum frame resolution rate. If any of the conditions in processes P1, P2, and P3 are not met, the receiving end and the transmitting end will abandon or terminate the current communication.

[0007] Further, in P1, the receiving end detects the signal-to-noise-interference ratio (SINR) value of the signaling link number LinkID transmitted by the transmitting end, and determines whether the SINR value meets the preset communication conditions, specifically: The receiving end receives signaling signals, including SBB / TBB broadcast, multimedia access control MAC, and paging frames, sent by the transmitting end in the channel using the signaling link number LinkID. The receiving end calculates the signal-to-noise-interference ratio (SINR) value corresponding to the currently received signaling link number LinkID, and determines whether the SINR value is greater than or equal to a preset SINR threshold value corresponding to the signaling link number LinkID. If the threshold value is met, the preset communication condition is satisfied. The SINR value is calculated by a power detection algorithm using the noise interference power and the useful signal power of the currently received signal. The ratio of the useful signal power to the noise interference power is the SINR value.

[0008] Furthermore, in P2, the control center, based on the signal-to-noise-interference ratio (SINR) value of the signaling link ID (LinkID) and a preset recursive formula, infers whether there is a suitable service link ID (LinkID) for data interaction. Specifically: The appropriate service link number (LinkID) and the corresponding channel are calculated using the recursive formula based on the current signaling link number (LinkID) of the transmitter and the corresponding signal-to-noise ratio (SINR) of the channel, the transmit power (Pt), and the channel interference noise power (NI). The recursive formula is as follows:

[0009] Wherein, *lid* and *Ch* are the signaling link number (LinkID) and the channel of the current transmitter, respectively. * and Ch * The calculated service link number (LinkID) and the corresponding channel.

[0010] For uplink addressing services where the transmitting end is a terminal device and the receiving end is the control center, the appropriate service link number (LinkID) and the corresponding channel are calculated by substituting the uplink signaling link number (LinkID) and the corresponding channel into the recursive formula. For downlink addressing services where the transmitting end is the control center and the receiving end is the terminal device, the appropriate service link number LinkID and the corresponding channel are calculated by substituting the downlink signaling link number LinkID and the corresponding channel into the recursive formula. The control center calculates the appropriate service link number (LinkID) and the corresponding channel, while the terminal device provides feedback on the service link number (LinkID) and the corresponding channel for the downlink addressing service, as well as the signal-to-noise ratio (SINR) value.

[0011] Furthermore, in P3, during data interaction, the transmitting end adjusts the number of transmissions per frame based on the receive mask sent by the receiving end using the signaling link number LinkID, ensuring that the current frame resolution rate of the receiving end is greater than or equal to the preset minimum frame resolution rate, specifically: The transmitting end continuously receives the receiving end using the signaling link number LinkID to send the receiving mask, and calculates the current frame rate per unit time based on the receiving mask; If the current frame resolution rate is less than the preset minimum frame resolution rate, the number of times a single frame is sent is adjusted to increase the frame resolution rate of the channel, so that the current frame resolution rate of the receiving end is greater than or equal to the preset minimum frame resolution rate, thereby increasing the reliability of system data communication. The receive mask adopts an ACK / NACK information feedback mechanism, which consists of several bytes. Each bit indicates whether the current frame has been received correctly, with 1 representing not received and 0 representing received.

[0012] The number of times a single frame is transmitted refers to the number of times the block number corresponding to the addressing service, including the uplink addressing service and the downlink addressing service, appears in a communication process, or the number of times a single block of data is repeatedly transmitted in a communication process.

[0013] The deframe rate is the ratio of the number of service blocks that have been parsed after deduplication per unit time to the number of service blocks that can be transmitted after deduplication on the current channel.

[0014] Furthermore, the receiving end and the transmitting end may abandon or terminate this communication, specifically as follows: If any condition in processes P1, P2, and P3 is not met, the receiving end and the transmitting end terminate the session by either not responding to the communication process or sending an end-session signal frame (EDN). The method of not responding to the communication process is adopted at the beginning of the communication process, and the method of sending the end-session signal frame (EDN) is adopted during the session.

[0015] A VDES-based communication access system for executing the VDES-based communication access method described above includes: The communication condition detection module is used to provide the receiving end with the signal-to-noise-interference ratio (SINR) value of the signaling link number LinkID transmitted by the transmitting end to detect the SINR value and determine whether the SINR value meets the preset communication conditions. The interactive service inference module is used to provide the control center with the ability to infer whether there is a suitable service link ID for data interaction based on the signal-to-noise-interference ratio (SINR) value of the signaling link ID (LinkID) and a preset recursive formula. The frame rate calculation module is used to adjust the number of times a single frame is sent during data interaction, based on the receive mask sent by the receiver using the signaling link number LinkID, so that the current frame rate of the receiver is greater than or equal to the preset minimum frame rate. The communication termination module is used to allow the receiving end and the transmitting end to abandon or terminate the current communication when any one of the conditions detected by the communication condition detection module, the interactive service inference module, and the frame rate calculation module is not met.

[0016] A computer device includes a memory and one or more processors, the memory storing computer code that, when executed by the one or more processors, causes the one or more processors to perform the method described above.

[0017] A computer-readable storage medium storing computer code that, when executed, performs the method described above.

[0018] Compared with the prior art, the present invention has the following beneficial effects: A communication access method based on a VDES system is provided, comprising: P1: The receiving end detects the signal-to-noise-interference ratio (SINR) of the signaling link number (LinkID) transmitted by the transmitting end, and determines whether the SINR meets preset communication conditions; P2: The control center infers whether there is a suitable service link number (LinkID) for data interaction based on the SINR of the signaling link number (LinkID) and a preset recursive formula; P3: During data interaction, the transmitting end adjusts the number of transmissions per frame according to the receive mask sent by the receiving end using the signaling link number (LinkID), ensuring that the current frame resolution rate of the receiving end is greater than or equal to a preset minimum frame resolution rate; if any condition in processes P1, P2, and P3 is not met, the receiving end and the transmitting end abandon or terminate the current communication. This technical solution, for VDE-TER and VDE-SAT communication systems with a star network architecture, achieves reliable communication access by selecting appropriate communication frequency bands, LinkIDs, transmission counts, and intelligent session termination based on uplink and downlink channel quality, and by the control center and terminal equipment. Based on this access method, the control center (shore station, satellite and shipborne terminals) and terminal equipment (shipborne terminals) enhance the effective access of terminal equipment, increase the system throughput, and improve the system robustness, laying a technical foundation for the efficient application of VDE-TER and VDE-SAT communication systems in the future. Attached Figure Description

[0019] Figure 1 This is a diagram showing the overall structure of the communication access method based on the VDES system of the present invention. Figure 2 This is a flowchart illustrating the overall communication process for uplink and downlink addressing services in this invention. Figure 3 This is a flowchart illustrating the communication details of uplink and downlink addressing services in this invention. Figure 4 This is a diagram showing the overall structure of the communication access system based on the VDES system of this invention. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0021] Those skilled in the art will understand that, unless specifically stated otherwise, the singular forms “a,” “an,” “the,” and “the” used herein may also include the plural forms. It should be further understood that the term “comprising” as used in this specification means the presence of the stated features, integers, steps, operations, elements, and / or components, but does not exclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and / or groups thereof.

[0022] First Embodiment like Figure 1-3 As shown, this embodiment provides a communication access method based on the VDES system for efficient access of control nodes and terminal addressing services in VDE-SAT and VDE-TER systems, improving system throughput and enhancing system robustness, based on the uplink and downlink addressing service access process of the VDES system with a star network architecture.

[0023] First, before proceeding with a detailed description, let's clarify the concepts of receiver and transmitter. Receiver and transmitter do not refer to a specific communication point; their meanings vary depending on the addressing service. In uplink addressing services, the receiver is the control center, and the transmitter is the terminal equipment. In downlink addressing services, the receiver is the terminal equipment, and the transmitter is the control center.

[0024] Control centers (shore stations, satellites, concentrator terminals, etc.) and terminal equipment (shipborne terminals, rescue terminals, handheld terminals, etc.) are configured with communicable LinkIDs (uplink and downlink signaling link IDs and uplink and downlink service link IDs) and their received SINR (signal-to-noise ratio) thresholds. ) and transmit power ( Maximum number of sends () Minimum frame rate () ).

[0025] The specific implementation includes the following steps: P1: The receiving end detects the signal-to-interference-plus-noise ratio (SINR) value of the signaling link number LinkID transmitted by the transmitting end, and determines whether the SINR value meets the preset communication conditions, specifically: According to the access procedure of uplink and downlink addressing services, the receiving end receives signaling signals, including SBB / TBB broadcast, Multimedia Access Control (MAC), and paging frames, transmitted by the transmitting end using the signaling link number (LinkID) in the channel. The receiving end calculates the signal-to-noise-interference ratio (SINR) value corresponding to the currently received signaling link number (LinkID), and determines whether the SINR value is greater than or equal to a preset SINR threshold value corresponding to the signaling link number (LinkID). If the threshold is met, the preset communication condition is satisfied. The SINR value is calculated by a power detection algorithm, which measures the noise interference power and the useful signal power of the currently received signal. The ratio of the useful signal power to the noise interference power is the SINR value.

[0026] like Figure 3 The diagram illustrates a downlink addressing service where the terminal device is the receiver and the control center is the transmitter. The terminal device (receiver) receives the signaling link ID (linkID) from the control center (transmitter). ) in the channel ( The terminal calculates the currently received signaling signals, such as broadcast (Satellite / Terrestrial Bulletin Board, SBB / TBB), Media Access Control (MAC), and paging frames, sent by the satellite / terrestrial bulletin board. ,judge If true, then the communication conditions are met.

[0027] P2: The control center, based on the signal-to-noise-interference ratio (SINR) of the signaling link ID (LinkID) and a preset recursive formula, infers whether there is a suitable service link ID (LinkID) for data interaction. Specifically: Based on the transmit power and communicable frequency band of each LinkID, it is deduced whether the service LinkID in the specified frequency band meets the service communication conditions.

[0028] Using an energy estimation method, a suitable service link number (LinkID) and the corresponding channel are calculated using the recursive formula based on the current signaling link number (LinkID) of the transmitter and the corresponding signal-to-noise ratio (SINR) of the channel, the transmit power (Pt), and the channel interference noise power (NI). The recursive formula is as follows:

[0029] Wherein, *lid* and *Ch* are the signaling link number (LinkID) and the channel of the current transmitter, respectively. * and Ch * The calculated service link number (LinkID) and the corresponding channel.

[0030] Or with Figure 3 The following example illustrates the downlink addressing service. An energy estimation method is used, based on the current... Received power ( ), transmit power ( ) and channel interference noise power ( To calculate The SINR value. The control center is based on... Does the SINR recursive formula have a suitable service link ID (LinkID(lid*) and channel? .

[0031] Furthermore, for uplink addressing services where the transmitting end is a terminal device and the receiving end is the control center, the appropriate service link number (LinkID) and corresponding channel are calculated by substituting the uplink signaling link number (LinkID) and corresponding channel into the recursive formula. For downlink addressing services where the transmitting end is the control center and the receiving end is the terminal device, the appropriate service link number (LinkID) and corresponding channel are calculated by substituting the downlink signaling link number (LinkID) and corresponding channel into the recursive formula. The calculation of the appropriate service link number (LinkID) and corresponding channel is performed by the control center, and the service link number (LinkID) and corresponding channel of the downlink addressing service, as well as the signal-to-noise ratio (SINR) value, are fed back by the terminal device.

[0032] Figure 3 For example, the recursive formula for downlink addressing services is as follows:

[0033] Figure 3 The recursive formula for the uplink addressing service in the example is as follows:

[0034] P3: During data interaction, the transmitting end adjusts the number of transmissions per frame based on the receive mask Nack_Mask sent by the receiving end using the signaling link number LinkID. ( The current frame rate of the receiving end is greater than or equal to the preset minimum frame rate. ≥ Specifically: The transmitting end continuously receives the receive mask Nack_Mask sent by the receiving end using the signaling link number LinkID, and calculates the current frame rate per unit time based on the receive mask. ; If the current frame rate is less than the preset minimum frame rate ( If so, adjust the number of times a single frame is sent. This increases the decoding rate of the channel, ensuring that the current decoding rate of the receiving end is greater than or equal to the preset minimum decoding rate. This increases the reliability of system data communication; The receive mask employs an ACK / NACK feedback mechanism, which consists of several bytes. Each bit indicates whether the current frame has been correctly received, with 1 representing no reception and 0 representing reception. The number of transmissions per frame is the number of times the block number corresponding to the addressing service, including the uplink and downlink addressing services, appears in a communication process, or the number of times a single block of data is repeatedly transmitted in a communication process. The frame decomposition rate is the ratio of the number of deduplicated and parsed service blocks per unit time to the number of service blocks that can be transmitted after deduplication on the current channel.

[0035] If any condition in process P1, P2, or P3 is not met, the receiving end and the transmitting end abandon or terminate the current communication. Specifically, if any condition in process P1, P2, or P3 is not met, the receiving end and the transmitting end terminate the session by means of either not responding to the communication process or sending an End Delivery Notification (EDN) signal frame. The method of not responding to the communication process is adopted at the beginning of the communication process, and the method of sending the End Delivery Notification (EDN) signal frame is adopted during the session.

[0036] Second Embodiment like Figure 4 As shown, this embodiment provides a VDES-based communication access system for executing the VDES-based communication access method described above, comprising: Communication condition detection module 1 is used to provide the receiving end with the signal-to-noise-interference ratio (SINR) value of the signaling link number LinkID transmitted by the transmitting end to detect and determine whether the SINR value meets the preset communication conditions. The interactive service inference module 2 is used to provide the control center with inferences based on the signal-to-noise-interference ratio (SINR) value of the signaling link number LinkID and a preset recursive formula to determine whether there is a suitable service link ID LinkID for data interaction. The frame rate calculation module 3 is used to adjust the number of times a single frame is sent during data interaction, based on the receiving mask sent by the receiving end using the signaling link number LinkID, so that the current frame rate of the receiving end is greater than or equal to the preset minimum frame rate. The communication termination module 4 is used to allow the receiving end and the transmitting end to abandon or terminate the current communication when any one of the conditions detected by the communication condition detection module, the interactive service inference module, and the frame rate calculation module is not met.

[0037] A computer-readable storage medium stores computer code that, when executed, performs the methods described above. Those skilled in the art will understand that all or part of the steps in the various methods of the above embodiments can be implemented by a program instructing related hardware. This program can be stored in a computer-readable storage medium, which may include: read-only memory (ROM), random access memory (RAM), a magnetic disk, or an optical disk, etc.

[0038] The above description is merely a preferred embodiment of the present invention. The scope of protection of the present invention is not limited to the above embodiments. All technical solutions falling within the scope of the present invention's concept are within the scope of protection of the present invention. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principles of the present invention should also be considered within the scope of protection of the present invention.

[0039] The technical features of the above embodiments can be combined in any way. For the sake of brevity, 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] It should be noted that the above embodiments can be freely combined as needed. The above description is only a preferred embodiment of the present invention. It should be pointed out that for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A communication access method based on a VDES system, characterized in that, include: P1: The receiving end detects the signal-to-noise-interference ratio (SINR) of the signaling link number LinkID transmitted by the transmitting end and determines whether the SINR meets the preset communication conditions; wherein, in the uplink addressing service, the receiving end is the control center and the transmitting end is the terminal equipment; in the downlink addressing service, the receiving end is the terminal equipment and the transmitting end is the control center. P2: The control center, based on the signal-to-noise-interference ratio (SINR) of the signaling link ID (LinkID) and a preset recursive formula, infers whether there is a suitable service link ID (LinkID) for data interaction. Specifically: The appropriate service link number (LinkID) and the corresponding channel are calculated using the recursive formula based on the current signaling link number (LinkID) of the transmitter and the corresponding channel's signal-to-noise-interference ratio (SINR), transmit power (Pt), and channel interference noise power (NI). The recursive formula is as follows: Wherein, *lid* and *Ch* are the signaling link number (LinkID) and the channel of the current transmitter, respectively. * and Ch * The calculated service link number (LinkID) and the corresponding channel; when When the value is greater than or equal to a preset threshold, it is inferred that there is a suitable business link ID (LinkID) for data interaction. P3: During data interaction, the transmitting end adjusts the number of times a single frame is sent according to the receiving mask sent by the receiving end using the signaling link number LinkID, so that the current frame resolution rate of the receiving end is greater than or equal to the preset minimum frame resolution rate. If any of the conditions in processes P1, P2, and P3 are not met, the receiving end and the transmitting end will abandon or terminate the current communication.

2. The communication access method based on the VDES system according to claim 1, characterized in that, In P1, the receiving end detects the signal-to-noise-interference ratio (SINR) value of the signaling link number LinkID transmitted by the transmitting end, and determines whether the SINR value meets the preset communication conditions, specifically: The receiving end receives signaling signals, including SBB / TBB broadcast, multimedia access control MAC, and paging frames, sent by the transmitting end in the channel using the signaling link number LinkID. The receiving end calculates the signal-to-noise-interference ratio (SINR) value corresponding to the currently received signaling link number LinkID, and determines whether the SINR value is greater than or equal to a preset SINR threshold value corresponding to the signaling link number LinkID. If the threshold value is met, the preset communication condition is satisfied. The SINR value is calculated by a power detection algorithm using the noise interference power and the useful signal power of the currently received signal. The ratio of the useful signal power to the noise interference power is the SINR value.

3. The communication access method based on the VDES system according to claim 1, characterized in that, The calculation of the suitable service link number LinkID and the corresponding channel using the recursive formula based on the current transmitter's signaling link number LinkID and the corresponding channel's signal-to-noise ratio (SINR), transmit power Pt, and channel interference noise power NI further includes: For uplink addressing services where the transmitting end is a terminal device and the receiving end is the control center, the appropriate service link number (LinkID) and the corresponding channel are calculated by substituting the uplink signaling link number (LinkID) and the corresponding channel into the recursive formula. For downlink addressing services where the transmitting end is the control center and the receiving end is the terminal device, the appropriate service link number LinkID and the corresponding channel are calculated by substituting the downlink signaling link number LinkID and the corresponding channel into the recursive formula. The control center calculates the appropriate service link number (LinkID) and the corresponding channel, while the terminal device provides feedback on the service link number (LinkID) and the corresponding channel for the downlink addressing service, as well as the signal-to-noise ratio (SINR) value.

4. The communication access method based on the VDES system according to claim 3, characterized in that, In P3, during data interaction, the transmitting end adjusts the number of transmissions per frame based on the receive mask sent by the receiving end using the signaling link number LinkID, ensuring that the current frame resolution rate of the receiving end is greater than or equal to the preset minimum frame resolution rate. Specifically: The transmitting end continuously receives the receiving end using the signaling link number LinkID to send the receiving mask, and calculates the current frame rate per unit time based on the receiving mask; If the current frame resolution rate is less than the preset minimum frame resolution rate, the number of times a single frame is sent is adjusted to increase the frame resolution rate of the channel, so that the current frame resolution rate of the receiving end is greater than or equal to the preset minimum frame resolution rate, thereby increasing the reliability of system data communication. The receive mask adopts an ACK / NACK information feedback mechanism, which consists of several bytes. Each bit indicates whether the current frame has been received correctly, with 1 representing not received and 0 representing received.

5. The communication access method based on the VDES system according to claim 4, characterized in that, Also includes: The number of times a single frame is sent is the number of times the block number corresponding to the addressing service, including the uplink addressing service and the downlink addressing service, appears in a communication process, or the number of times a single block of data is repeatedly sent in a communication process. The deframe rate is the ratio of the number of service blocks that have been parsed after deduplication per unit time to the number of service blocks that can be transmitted after deduplication on the current channel.

6. The communication access method based on the VDES system according to claim 1, characterized in that, The receiving end and the transmitting end abandon or terminate this communication, specifically as follows: If any of the conditions in processes P1, P2, and P3 are not met, the receiving end and the transmitting end terminate the session by means of either not responding to the communication process or sending an end-session signal frame (EDN). At the beginning of the communication process, the communication process is not responded to. During the session, the session termination signal frame (EDN) is sent.

7. A VDES-based communication access system for executing the VDES-based communication access method as described in any one of claims 1-6, characterized in that, include: The communication condition detection module is used to provide the receiving end with the signal-to-noise-interference ratio (SINR) value of the signaling link number LinkID transmitted by the transmitting end to detect the SINR value and determine whether the SINR value meets the preset communication conditions. The interactive service inference module is used to provide the control center with the ability to infer whether there is a suitable service link ID for data interaction based on the signal-to-noise-interference ratio (SINR) value of the signaling link ID (LinkID) and a preset recursive formula. The frame rate calculation module is used to adjust the number of times a single frame is sent during data interaction, based on the receive mask sent by the receiver using the signaling link number LinkID, so that the current frame rate of the receiver is greater than or equal to the preset minimum frame rate. The communication termination module is used to allow the receiving end and the transmitting end to abandon or terminate the current communication when any one of the conditions detected by the communication condition detection module, the interactive service inference module, and the frame rate calculation module is not met.

8. A computer device comprising a memory and one or more processors, the memory storing computer code that, when executed by the one or more processors, causes the one or more processors to perform the method as described in any one of claims 1 to 6.

9. A computer-readable storage medium storing computer code, wherein when the computer code is executed, the method of any one of claims 1 to 6 is performed.