A wide and narrow band network transmission switching method

Abstract

This invention discloses a method for switching between broadband and narrowband network transmission, comprising: initializing broadband and narrowband network transmission by a broadband and narrowband network transmission module; and completing the broadband and narrowband network switching by a link selection module of the MIAM core layer. This invention can comprehensively determine and select IP / ACARS links for transmission; it achieves cross-network converged transmission and seamless roaming between ACARS and IP networks, improving the redundancy and diversity of air-to-ground transmission; and it allows for flexible configuration of switching strategies, improving transmission security and economy.

Description

Technical Field

[0001] This invention relates to the field of network transmission technology, and in particular to a method for switching between broadband and narrowband network transmission. Background Technology

[0002] According to predictions from the International Air Transport Organization (IATA), a considerable number of new aircraft models will be included in the future. On the one hand, these new models will be equipped with a large number of sensors, generating massive amounts of data during flight. On the other hand, facing increasingly busy airspace, the amount of data exchanged between ground controllers and pilots will increase exponentially in order to more accurately ensure flight safety. However, the current domestic civil aircraft air-to-ground communication uses the ACARS network with ARINC 618 protocol encapsulation, which can only support messages of about 3.3kb or smaller, and cannot meet the massive data air-to-ground communication needs of future aircraft flights.

[0003] To improve the efficiency of traditional networks, a Media Independent Air-to-Ground Message Transmission (MIAM) mechanism is proposed. While enhancing the information exchange capabilities of traditional Aircraft Addressing and Reporting Systems (ACARS) networks, MIAM proposes using IP networks for ACARS message air-to-ground transmission. MIAM extends the ACARS message length, overcoming the limitations of the ARINC 618 ACARS protocol stack on the size of transmitted data blocks. Through message segmentation and reassembly features, it supports larger message transmissions than the ACARS network, enabling applications to transmit large volumes of data using the ACARS network. Simultaneously, it provides a method for AOC applications to use IP networks for air-to-ground transmission. This achieves a high-capacity, secure, efficient, and economical air-to-ground interaction method for ACARS messages based on both ACARS and IP networks, supporting reliable and trustworthy air-to-ground information transmission and enabling secure data transmission across heterogeneous networks.

[0004] Under this architecture, ACARS messages can be transmitted simultaneously via both broadband and narrowband networks. However, due to varying economic and security requirements among different airlines, different application message sizes, and changing link states, transmission switching over the IP / ACARS network is subject to multiple factors and constraints. Therefore, it is necessary to comprehensively consider the transmission link priority, message size, and link availability in the configuration file to design a reasonable, feasible, and diverse broadband / narrowband network switching strategy. Summary of the Invention

[0005] Therefore, the present invention provides a method for switching between broadband and narrowband network transmission.

[0006] This invention discloses a method for switching between broadband and narrowband network transmissions, comprising: Step 1: The broadband and narrowband network transmission modules initialize the broadband and narrowband network transmission. Step 2: The MIAM core layer link selection module completes the switching between broadband and narrowband networks.

[0007] Further, step 1 includes: Step 11: The broadband and narrowband network transmission modules perform initialization operations, read system configuration items, and determine whether the system configuration items have been successfully loaded; Step 12: If the system configuration items are successfully loaded, read the link status; the link status includes whether the current link is available; Step 13: Determine if the IP link is available, and determine if the ACARS link is available; Step 14: If the IP link or ACARS link is available, after checking that the peer MIAM entity exists through the ALO / ALR handshake mechanism, update the context; Step 15: Determine whether the broadband and narrowband network transmission initialization was successful. If the initialization was successful, enter the IDLE state and wait for message transmission. If the broadband and narrowband network transmission initialization failed, enter the fault mode and update the log.

[0008] Furthermore, step 11 also includes: If loading system configuration items fails, enter fault mode and update the logs.

[0009] Furthermore, step 13 also includes: If the IP link or ACARS link is unavailable, update the context and then re-execute step 15.

[0010] Furthermore, the link selection module selects IP links and ACARS links according to the IP / ACARS transmission link selection strategy; The IP / ACARS transmission link selection strategy includes a link configuration policy file, the availability of the IP / ACARS network, the size of the application message, and the MIAM core layer link selection strategy. There is a one-to-one correspondence between the link configuration policy file, the availability of the IP / ACARS network, the size of the application message, and the MIAM core layer link selection strategy. The MIAM core layer link selection strategy is jointly determined based on the link configuration policy file, the availability of the IP / ACARS network, and the size of the application message.

[0011] Furthermore, when the number of application messages exceeds a preset value, transmission can only be performed through the ACARS link. The MIAM core layer link selection strategy includes selecting ACARS link for transmission, selecting ACARS link for transmission, returning NACK to the distribution application, or discarding the message and returning NACK to the distribution application.

[0012] Furthermore, the link configuration policy file includes the airline's economic and security requirements for application message transmission, namely, prioritizing ACARS or IP networks for transmission, or only one link can be selected; in terms of IP / ACARS network availability, if the comprehensive judgment policy indicates that no link is available, the message is discarded and a NACK is returned to the distribution application.

[0013] Further, step 2 includes: Step 21: The MIAM core layer receives the application data request and selects a link based on the link configuration policy file and the link status; the link status includes whether the current link is available. Step 22: When an IP link is selected, if the transmission is successful, the current transmission ends; if the transmission fails, return to the link selection section to determine whether to switch links. If switching is possible, select the ACARS link for transmission. When an ACARS link is selected, the data is compressed and transmission begins. If the transmission is successful, the current transmission ends; if the transmission fails, return to the link selection section to determine whether to switch links. If switching is possible, select the IP link for transmission. Step 23: If the number of transmission attempts by switching links reaches the preset number and the transmission still fails, then this transmission has failed.

[0014] Furthermore, an IP / ACARS transmission link switching strategy is used to determine whether to switch links. The IP / ACARS transmission link switching strategy includes: if transmission fails through a link, and the IP / ACARS transmission link switching strategy determines that the link can be switched, then the transmission is switched to another link; if the comprehensive determination shows that the link cannot be switched, then the message is discarded and a NACK is returned to the distribution application.

[0015] Furthermore, the IP / ACARS transmission link switching strategy includes a link configuration strategy file, IP / ACARS network availability, message size, MIAM core layer link selection strategy, link transmission result, and MIAM core layer link switching strategy; there is a one-to-one correspondence between the link configuration strategy file, IP / ACARS network availability, message size, MIAM core layer link selection strategy, link transmission result, and MIAM core layer link switching strategy; wherein, the link configuration strategy file includes a priority comparison between ACARS links and IP policies.

[0016] Because of the adoption of the above technical solution, the present invention has the following advantages: 1. Comprehensive judgment on broadband and narrowband link selection: The selection of IP / ACARS link for transmission can be comprehensively judged based on the airline's security and economic requirements, the availability of IP / ACARS link, and the size of application messages.

[0017] 2. Air-to-ground data switching transmission across narrowband and broadband links: It has the ability to select and switch between ACARS network links and IP network links. Air-to-ground data can be switched and transmitted across broadband and narrowband links, realizing cross-network converged transmission and seamless roaming between ACARS network and IP network, and improving the redundancy and diversity of air-to-ground transmission.

[0018] 3. Flexible configuration of switching strategies to improve transmission security and economy: Switching strategies can be flexibly configured to meet the needs of different airline customers and different applications, thereby reducing air-to-ground transmission costs and improving transmission security performance. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments recorded in the embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings.

[0020] Figure 1 This is a schematic diagram of the broadband and narrowband network transmission initialization process according to an embodiment of the present invention; Figure 2 This is a schematic diagram of the broadband / narrowband network switching process according to an embodiment of the present invention; Figure 3 This is a flowchart illustrating a method for switching between broadband and narrowband network transmission according to an embodiment of the present invention. Detailed Implementation

[0021] The present invention will be further described in conjunction with the accompanying drawings and embodiments. The described embodiments are only a part of the embodiments of the present invention, and not all of them. All other embodiments obtained by those skilled in the art should fall within the protection scope of the present invention.

[0022] See Figure 3 This invention provides an embodiment of a method for switching between broadband and narrowband network transmissions, comprising: S1: The broadband and narrowband network transmission modules initialize the broadband and narrowband network transmission. The validity of the configuration file loaded during initialization is a prerequisite for the handover transmission between air-to-ground broadband and narrowband networks. The flowchart of the broadband and narrowband network transmission initialization logic is as follows: Figure 1 As shown. The loaded configuration file includes the transport link specified by the application and the priority of the transport link.

[0023] The broadband and narrowband network transmission modules perform initialization operations, reading system configuration items and link status. After checking the existence of the peer MIAM entity through the ALO / ALR handshake mechanism, they update the context, display "initialization successful," and enter the IDLE state, waiting for message transmission. If initialization fails, they enter fault mode and update the logs. The link status includes whether the current link is available.

[0024] S2: The MIAM core layer link selection module completes the switching between wideband and narrowband networks.

[0025] The broadband / narrowband network switching function is completed by the link selection module of the MIAM core layer. Figure 2 This describes the handover process between broadband and narrowband networks. The broadband / narrowband network handover process is as follows: When the MIAM core layer receives an application data request, it selects a link based on the configuration file and link status. The specific link selection strategy is shown in Table 1. Link status refers to the availability of the IP / ACARS network. When an IP link is selected, if the transmission is successful, the transmission ends; if the transmission fails, return to the link selection section to determine whether to switch links. If switching is possible, select the ACARS link for transmission.

[0026] When an ACARS link is selected, the data is compressed and then transmitted. If the transmission is successful, the transmission ends. If the transmission fails, the system returns to the link selection section to determine whether to switch links. If a switch is possible, an IP link is selected for transmission.

[0027] If the transmission fails after three attempts to switch links, the transmission is considered a failure.

[0028] The strategy for selecting between broadband and narrowband networks is as follows: After successful initialization, the system successfully reads the system configuration items and link status. After checking the existence of the MIAM entity on the IP and ACARS links via the ALO / ALR handshake mechanism, the link selection module determines the link selection and switching strategy between ACARS and IP networks based on the link configuration policy file, the availability of the IP / ACARS network, and the size of the application message. When the application message is too large, it can only be transmitted via the ACARS link. The recommended threshold value in this algorithm is 50KB. The link configuration policy file contains the airline's economic and security requirements for application message transmission, i.e., whether to prioritize ACARS or IP networks for transmission, or whether only one link can be selected. The IP / ACARS transmission link selection strategy is shown in Table 1. If the comprehensive judgment strategy indicates that no link is available, the message is discarded and a NACK is returned to the distribution application. Table 1 IP / ACARS Transmission Link Selection Strategy

[0029] The broadband / narrowband network handover strategy is as follows: The IP / ACARS transmission link switching strategy is shown in Table 2. If transmission fails on a certain link, and the switching strategy determines that a link can be switched, then transmission will switch to another link. If the overall determination indicates that a link cannot be switched, then the message will be discarded and a NACK will be returned to the distribution application.

[0030] Table 2 IP / ACARS Transmission Link Switching Strategy

[0031] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit it. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that modifications or equivalent substitutions can still be made to the specific implementation of the present invention. Any modifications or equivalent substitutions that do not depart from the spirit and scope of the present invention should be covered within the scope of protection of the claims of the present invention.

Claims

1. A method for wide and narrow band network transmission switching, characterized by, include: Step 1: The broadband and narrowband network transmission modules initialize the broadband and narrowband network transmission. Step 2: The link selection module of the MIAM core layer completes the switching between broadband and narrowband networks; The link selection module selects IP links and ACARS links according to the IP / ACARS transmission link selection strategy; The IP / ACARS transmission link selection strategy includes a link configuration policy file, the availability of the IP / ACARS network, the size of the application message, and the MIAM core layer link selection strategy. There is a one-to-one correspondence between the link configuration policy file, the availability of the IP / ACARS network, the size of the application message, and the MIAM core layer link selection strategy. The MIAM core layer link selection strategy is jointly determined based on the link configuration policy file, the availability of the IP / ACARS network, and the size of the application message. When the number of application messages exceeds the preset value, they can only be transmitted through the ACARS link. The MIAM core layer link selection strategy includes selecting ACARS link for transmission, selecting ACARS link for transmission, returning NACK to the distribution application, or discarding the message and returning NACK to the distribution application. Step 2 includes: Step 21: The MIAM core layer receives the application data request and selects a link based on the link configuration policy file and the link status; the link status includes whether the current link is available. Step 22: When an IP link is selected, if the transmission is successful, the current transmission ends; if the transmission fails, return to the link selection section to determine whether to switch links. If switching is possible, select the ACARS link for transmission. When an ACARS link is selected, the data is compressed and transmission begins. If the transmission is successful, the current transmission ends; if the transmission fails, return to the link selection section to determine whether to switch links. If switching is possible, select the IP link for transmission. Step 23: If the number of transmission attempts by switching links reaches the preset number and the transmission still fails, then this transmission has failed.

2. The method of claim 1, wherein, Step 1 includes: Step 11: The broadband and narrowband network transmission modules perform initialization operations, read system configuration items, and determine whether the system configuration items have been successfully loaded; Step 12: If the system configuration items are successfully loaded, read the link status; the link status includes whether the current link is available; Step 13: Determine if the IP link is available, and determine if the ACARS link is available; Step 14: If the IP link or ACARS link is available, after checking that the peer MIAM entity exists through the ALO / ALR handshake mechanism, update the context; Step 15: Determine whether the broadband and narrowband network transmission initialization was successful. If the initialization was successful, enter the IDLE state and wait for message transmission. If the broadband and narrowband network transmission initialization failed, enter the fault mode and update the log.

3. The method of claim 2, wherein, Step 11 further includes: If loading system configuration items fails, enter fault mode and update the logs.

4. The method according to claim 2, characterized in that, Step 13 also includes: If the IP link or ACARS link is unavailable, update the context and then re-execute step 15.

5. The method according to claim 1, characterized in that, The link configuration policy file includes the airline's economic and security requirements for application message transmission, namely, prioritizing ACARS or IP networks for transmission, or only one link can be selected; in the availability of IP / ACARS networks, if the comprehensive judgment policy indicates that no link is available, the message is discarded and a NACK is returned to the distribution application.

6. The method according to claim 1, characterized in that, The IP / ACARS transmission link switching strategy is used to determine whether to switch links. The IP / ACARS transmission link switching strategy includes: if transmission fails through a link, and the IP / ACARS transmission link switching strategy determines that the link can be switched, then the transmission is switched to another link; if the comprehensive determination shows that the link cannot be switched, then the message is discarded and a NACK is returned to the distribution application.

7. The method according to claim 6, characterized in that, The IP / ACARS transmission link switching strategy includes a link configuration policy file, IP / ACARS network availability, message size, MIAM core layer link selection strategy, link transmission results, and MIAM core layer link switching strategy. These six elements—link configuration policy file, IP / ACARS network availability, message size, MIAM core layer link selection strategy, link transmission results, and MIAM core layer link switching strategy—correspond one-to-one. The link configuration policy file includes a priority comparison between ACARS links and IP policies.

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