CN117318795A - Air-to-ground transmission system and method supporting wide and narrow band link switching - Google Patents
Air-to-ground transmission system and method supporting wide and narrow band link switching Download PDFInfo
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- CN117318795A CN117318795A CN202311438177.5A CN202311438177A CN117318795A CN 117318795 A CN117318795 A CN 117318795A CN 202311438177 A CN202311438177 A CN 202311438177A CN 117318795 A CN117318795 A CN 117318795A
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- 230000005540 biological transmission Effects 0.000 title claims abstract description 177
- 238000000034 method Methods 0.000 title claims abstract description 25
- 238000004891 communication Methods 0.000 claims abstract description 56
- 230000004927 fusion Effects 0.000 claims abstract description 33
- 238000007726 management method Methods 0.000 claims description 204
- 230000006978 adaptation Effects 0.000 claims description 21
- 230000003993 interaction Effects 0.000 claims description 16
- 238000012545 processing Methods 0.000 claims description 8
- 101000741965 Homo sapiens Inactive tyrosine-protein kinase PRAG1 Proteins 0.000 claims description 4
- 102100038659 Inactive tyrosine-protein kinase PRAG1 Human genes 0.000 claims description 4
- 238000007906 compression Methods 0.000 claims description 4
- 230000006835 compression Effects 0.000 claims description 4
- 238000012790 confirmation Methods 0.000 claims description 4
- 238000013144 data compression Methods 0.000 claims description 4
- 230000011218 segmentation Effects 0.000 claims description 4
- 238000012546 transfer Methods 0.000 claims description 4
- 238000004458 analytical method Methods 0.000 claims description 3
- 238000011161 development Methods 0.000 description 4
- 230000018109 developmental process Effects 0.000 description 4
- 230000007246 mechanism Effects 0.000 description 4
- 238000004590 computer program Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
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- 238000012423 maintenance Methods 0.000 description 1
- 238000010295 mobile communication Methods 0.000 description 1
Classifications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/14—Relay systems
- H04B7/15—Active relay systems
- H04B7/185—Space-based or airborne stations; Stations for satellite systems
- H04B7/18502—Airborne stations
- H04B7/18506—Communications with or from aircraft, i.e. aeronautical mobile service
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W36/00—Hand-off or reselection arrangements
- H04W36/14—Reselecting a network or an air interface
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W36/00—Hand-off or reselection arrangements
- H04W36/16—Performing reselection for specific purposes
- H04W36/18—Performing reselection for specific purposes for allowing seamless reselection, e.g. soft reselection
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
Abstract
The invention discloses an air-ground transmission system and method supporting wide and narrow-band link switching, belonging to the field of air-ground communication, and comprising an airborne system and a ground system; the airborne system comprises a wide-narrow-band link management module, a communication management module, a wide-band link management module and various wide-narrow-band links; the ground system comprises an ACARS gateway of a ground data service provider, a ground end broadband link management module and a ground end broadband narrow band link management module. The invention is compatible with the existing ACARS network communication system, also supports the network communication system based on the IP protocol, carries out unified management and scheduling on the non-IP link and the IP link, and can carry out wide-narrow band link switching when the link is interrupted, thereby further realizing the fusion transmission of various air-ground wireless networks.
Description
Technical Field
The invention relates to the field of air-to-ground communication, in particular to an air-to-ground transmission system and method supporting wide and narrow-band link switching.
Background
With the rapid increase of civil aviation traffic and the rapid development of informatization technologies, air traffic management departments, airline operation and control centers, pilots, crews, maintenance tasks, passengers, aircraft manufacturers and the like all put forward extremely high requirements on the data volume, interaction instantaneity and safety of air-ground interaction, and the traditional HF (high frequency) and VHF (very high frequency) link transmission bandwidth is narrow, the safety is low, the system architecture design advancement is limited and the like, so that the real-time and high-bandwidth interaction requirements required by the autonomous operation process of the aircraft cannot be met gradually.
With the development of the new generation air-ground communication network, the air-ground communication network gradually evolves from the traditional ACARS network to the IP broadband network. For example, the communication means of the traditional HF and VHF, the cockpit L-band satellite aeroMACS, ka/Ku frequency band broadband satellite, air-ground broadband communication ATG, aviation airport scene broadband mobile communication system and the like are developed. Various broadband wireless communication links have advantages of available bandwidth, high communication rate, and the like, as compared to conventional HF/VHF.
Meanwhile, with the technical development and the increase of complexity of the avionics system, more and more airborne data are required to be transmitted in real time in the air, and how to safely, reliably and real-time transmit mass data in the air by utilizing a broadband link on the premise of being compatible with the existing application and link becomes the development trend of the air-ground transmission system of the advanced civil aircraft in the future.
The traditional air-ground link front and rear cabins are isolated in a physical mode, the cockpit terminal application utilizes a non-IP link to carry out air-ground transmission, and the rear cabin terminal application utilizes an IP link to carry out air-ground transmission. The IP link cannot be compatible with existing ACARS applications and cannot be switched over by a broadband or narrowband link after the link is interrupted.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide a space-to-ground transmission system and a method supporting wide and narrow-band link switching, which have the advantages of strong compatibility and the like.
The invention aims at realizing the following scheme:
an air-to-ground transmission system supporting wide and narrow band link switching comprises a wide and narrow band link management module, a communication management module and a wide band link management module;
the wide and narrow band link management module interacts with the communication management module through an ARINC429 bus to realize air-to-ground message transmission based on ACARS, and interacts with the wide band link management module through the Ethernet to realize air-to-ground message transmission based on ACARS;
the communication management module is used for realizing the function of an ACARS protocol stack, interacting with the wide and narrow band link management module through an ARINC429 bus and interacting with the cabin marine sanitation device through the ARINC429 bus, supporting the routing, flow control and space and ground reliable transmission functions of data transmission of a cabin marine sanitation link non-IP link, and being responsible for space and ground data receiving and transmitting based on the non-IP link and seamless roaming and switching between the non-IP links;
the method comprises the steps of interacting with a broadband link management module through Ethernet and interacting with broadband link transmission equipment of an Ethernet cockpit, supporting the functions of routing, flow control and space-based reliable transmission of broadband link data transmission of the cockpit, and supporting seamless roaming and switching among IP links; and the analysis, routing and distribution of the ACARS messages are realized through the ACARS gateway.
Further, the wide-narrow-band link management module comprises an airborne-end wide-narrow-band link management module and a ground-end wide-narrow-band link management module, wherein the airborne-end wide-narrow-band link management module resides in an IMA platform or in a communication management module or in a single wide-narrow-band link management device; the ground end broadband and narrowband link management module resides in a ground system server, supports seamless roaming and switching between a non-IP link and an IP link, supports data compression, encoding and decoding and encryption and decryption, and realizes ACARS-based segmented transmission and IP-based message transmission which accord with ARINC 841.
Further, the broadband link management module comprises an airborne broadband link management module and a ground broadband link management module; the onboard broadband link management module resides in an information system server or resides in broadband link management equipment alone; the ground-side broadband link management module resides in a ground server.
Further, the method further comprises the following steps: the ACARS air-to-ground communication link composed of HF, VHF, L wave band guard, HF ground station, VHF ground station and L wave band guard ground station is used for completing the air-to-ground ACARS message wireless transmission function.
Further, the method further comprises the following steps: the air-to-ground broadband communication link is formed by the 5G ATG, the 5G aeroMACS, the Ku/Ka wave band guard link, the 5G ATG base station, the 5G aeroMACS base station and the Ku/Ka wave band guard ground station and is used for completing the air-to-ground broadband data wireless transmission function.
Further, the broadband and narrowband link management module specifically comprises an application layer, an application interface adaptation layer, a broadband and narrowband link core management layer, an ACARS fusion layer and an IP fusion layer;
the application layer is specifically an upper layer application residing in the terminal or in the wide and narrow band link management equipment, and the newly developed application performs message interaction with the ground end wide and narrow band link management module through a standard interface and a wide and narrow band link management module; the existing application performs message interaction with the ground end broadband and narrowband link management module through the access broadband and narrowband link management module which is not perceived by the application interface adaptation layer;
the application interface adaptation layer is used as an adaptation module to complete communication between the broadband and narrowband link core management layer and the terminal application, so that the terminal application is not perceived to access the broadband and narrowband link core management layer;
the broadband and narrowband link core management layer provides connectionless message service for the application layer, and is used for carrying out message interaction with the opposite-end broadband and narrowband link core management layer, and is irrelevant to a network for transmitting messages;
the ACARS fusion layer provides transmission service based on an ACARS network for the information of the broadband and narrowband link core management layer;
the IP convergence layer provides message/data transmission service for the broadband/narrowband link core management layer through the IP network communication service using the IP middleware.
Further, the broadband and narrowband link core management layer can interact with both character-based messages and bit-based messages, and specifically includes implementing the following functions:
message number: numbering the messages of the application layer so as to facilitate message confirmation or retransmission;
message integrity check: calculating CRC value of the message and checking at the opposite end;
link selection and switching: defining a priority-based routing and switching strategy according to the security level, real-time performance and reliability requirements of a terminal application service flow, and transmitting the service flow needing to be subjected to air-ground transmission by using a cockpit non-IP link to an ACARS (access control information system) on-board terminal through an ACARS fusion layer to realize non-IP link transmission; the service flow which needs to be transmitted by the IP link in the air-to-ground mode is sent to the broadband link management airborne terminal through the IP fusion layer, so that the IP link transmission is realized; when the IP or non-IP link is interrupted, switching the links between the IP and the non-IP link according to the state of the current link on the premise that the interrupted application is not perceived;
and/or the number of the groups of groups,
message compression processing: for reducing the transmission data length of the empty section.
Further, the ACARS fusion layer specifically includes implementing the following functions:
message codec: the method comprises the steps of encoding a message of a broadband and narrowband link core management layer according to an ACARS character set format, and decoding the received message at an opposite end;
message life cycle management: carrying out message life cycle management on the messages of the broadband and narrowband link core management layer during transmission through the ACARS network;
message segmentation and reassembly: segmenting the information transmitted by the ACARS network to ensure that the length of the information is not more than the maximum length specified by ARINC 618 specification, and reorganizing the received information;
encrypting and decrypting the message: message encryption is carried out on the information of the broadband and narrowband link core management layer during transmission through the ACARS network, and received information is decrypted;
file transfer management: file transmission management is carried out on the segmented message through a file transmission protocol;
communication with the ACARS on-board terminal: as terminal application of ACARS, the terminal application communicates with an ACARS on-board terminal according to a standard data link protocol, and provides ACARS message transmission service for messages of a broadband and narrowband link core management layer.
Further, the IP convergence layer specifically includes implementing the following functions:
message life cycle management: message life cycle management is carried out on the messages of the broadband and narrowband link core management layer during the transmission through the IP network;
communication with the IP intermediate layer: the message can be transmitted safely and reliably based on the IP network through the IP middleware.
A space-to-ground transmission method supporting wide and narrow band link switching, based on the space-to-ground transmission system supporting wide and narrow band link switching as described above, performs the following steps:
s1, an airborne terminal application layer initiates a data transmission request;
s2, an application interface adaptation layer adapts the interface according to the need and initiates a data request to a broadband and narrowband link core management layer;
s3, after being processed by the broadband and narrowband link core management layer, selecting a link according to the link priority configuration file and the current link state;
s4, when the IP link is selected, the data is processed through the IP fusion layer and then transmitted through the IP link; when the transmission is successful, the transmission is ended; when the transmission is unsuccessful, returning to a link selection part in the broadband and narrowband link core management layer, judging whether to switch the link, and if the link can be switched, selecting an ACARS link for transmission; if the final transmission fails, performing failure processing, and ending the message transmission;
s5, when the ACARS link is selected, the data is processed through the ACARS fusion layer and then transmitted through the ACARS link; when the transmission is successful, the transmission is ended; when the transmission is unsuccessful, returning to a link selection part in the broadband and narrowband link core management layer, judging whether to switch the link, and if the link can be switched, selecting an IP link for transmission; if the final transmission fails, NACK is sent to the application layer, and the message transmission is ended.
The beneficial effects of the invention include:
(1) The scheme of the invention can be compatible with narrowband and broadband links: the device can be compatible with various narrow bands such as VHF, HF, L-band guard and the like and various broadband links such as Ka/Ku, ATG, aeroMACS and the like.
(2) The scheme of the invention does not affect the existing ACARS equipment: the switching mechanism is realized as an upper protocol layer based on the existing ACARS service, does not need to modify any existing ACARS components, and does not influence the existing ACARS equipment.
(3) The scheme of the invention does not affect the existing application: the switching mechanism introduces an application interface adaptation layer, has no influence on the existing application, and can perform message interaction between the existing application and the ground end broadband narrowband link management module through the access broadband narrowband link management module which is not perceived by the application interface adaptation layer.
(4) The scheme of the invention can support the switching transmission of space-to-ground data across narrowband and broadband links: the cross-network switching transmission between the character-based ACARS network and the bit-based IP network can be supported.
(5) The scheme of the invention is compatible with the existing ACARS network communication system, can also support the network communication system based on the IP protocol, performs unified management and scheduling on the non-IP link and the IP link, and can perform wide-narrow band link switching when the link is interrupted, thereby further realizing the fusion transmission of various air-ground wireless networks.
Drawings
In order to more clearly illustrate the embodiments of the invention or the technical solutions of the prior art, the drawings which are used in the description of the embodiments or the prior art will be briefly described, it being obvious that the drawings in the description below are only some embodiments of the invention, and that other drawings can be obtained according to these drawings without inventive faculty for a person skilled in the art.
Fig. 1 is a space-time transmission system architecture supporting wide-narrowband link switching in accordance with an embodiment of the present invention;
FIG. 2 is a software hierarchical structure of a broadband/narrowband link management module in accordance with an embodiment of the present invention;
fig. 3 is a flow chart of switching a narrowband link according to an embodiment of the invention.
Detailed Description
All of the features disclosed in all of the embodiments of this specification, or all of the steps in any method or process disclosed implicitly, except for the mutually exclusive features and/or steps, may be combined and/or expanded and substituted in any way.
In view of the problems in the background, the invention provides a broadband and narrowband link switching mechanism, which aims to be compatible with the existing ACARS network communication system, can also support the network communication system based on an IP protocol, uniformly manage and schedule non-IP links and IP links, and can switch broadband and narrowband links when the links are interrupted, thereby further realizing the fusion transmission of various air-to-ground wireless networks.
In one aspect, the present invention provides a new air-to-ground transmission system supporting switching of wide and narrow links, where the system architecture is shown in fig. 1, and the system mainly includes an airborne system and a ground system, and the airborne system includes: the system comprises a broadband and narrowband link management module, a communication management module, a broadband link management module and various broadband and narrowband links. The ground system consists of an ACARS gateway of a ground data service provider, a broadband link management module (ground end) and a broadband and narrowband link management module (ground end).
The broadband and narrowband link management module: the system comprises an airborne terminal and a ground terminal, wherein the airborne terminal can reside in an IMA platform, a communication management unit or single broadband and narrowband link management equipment, the ground terminal resides in a ground system server, seamless roaming and switching between a non-IP link and an IP link are supported, data compression, encoding and decoding, encryption and decryption and the like are supported, and ACARS-based segmented transmission and IP-based message transmission conforming to ARINC 841 are realized; the wide and narrow band link management module interacts with the communication management module through ARINC429 bus to realize the air-to-ground message transmission based on ACARS, interacts with the wide band link management module through Ethernet to realize the air-to-ground message transmission based on ACARS,
and a communication management module: the method mainly realizes the function of an ACARS protocol stack, interacts with a wide-narrow-band link management module through an ARINC429 bus and interacts with cockpit HF, VHF and L-band marine sanitation equipment, supports the functions of routing, flow control and space-to-ground reliable transmission of data transmission of the non-IP links of the cockpit HF, VHF and L-band marine sanitation links, and is responsible for space-to-ground data transceiving based on the non-IP links and seamless roaming and switching between the non-IP links;
broadband link management module: the system comprises an onboard end and a ground end, wherein the onboard end can reside in an information system server or can reside in broadband link management equipment independently, and the ground end resides in a ground server. The Ethernet is interacted with the broadband link management module, and broadband link transmission equipment such as cockpit broadband guard, ATG, 5G aeroMACS and the like is interacted, so that the functions of routing, flow control and space reliable transmission of broadband link data transmission such as cockpit broadband guard, ATG, 5G aeroMACS and the like are supported, and seamless roaming and switching among IP links can be supported;
HF. VHF, L band guard, HF ground station, VHF ground station, L band guard ground station: an ACARS air-space communication link is used for completing the air-space ACARS message wireless transmission function;
5G ATG, 5G aeroMACS, ku/Ka band guard link, 5G ATG base station, 5GAeroMACS base station, ku/Ka band guard ground station: the air-to-ground broadband communication link completes the air-to-ground broadband data wireless transmission function;
ACARS gateway: and the functions of analyzing, routing, distributing and the like of the ACARS message are realized.
Further, in the present invention, the wideband and narrowband link management module is the core of wideband and narrowband link switching transmission, and proposes a new software hierarchical structure, as shown in fig. 2, and specifically includes:
application layer: the system mainly refers to an upper layer application residing in a terminal or in a wide and narrow band link management device, and a newly developed application can carry out message interaction with a ground end wide and narrow band link management module through a standard interface; the existing application can carry out message interaction with the ground end broadband and narrowband link management module through the access broadband and narrowband link management module which is not perceived by the application interface adaptation layer;
application interface adaptation layer: the communication between the broadband and narrowband link core management layer and the terminal application is completed as an adaptation module, so that the terminal application is not perceived to access the broadband and narrowband link core management layer;
core management layer of wide and narrow band link: the method mainly provides connectionless message service for an application layer, and is used for carrying out message interaction with a peer broadband and narrowband link core management layer, and is irrelevant to a network for transmitting messages. Both character-based and bit-based messages can be interacted with. The main functions include:
message number: numbering the messages of the application layer so as to facilitate message confirmation or retransmission;
message compression processing: an optional operation for reducing a transmission data length of the null segment;
message integrity check: calculating CRC value of the message and checking at the opposite end;
link selection and switching: the routing and switching strategy based on priority can be defined according to the security level, instantaneity and reliability requirements of the terminal application service flow, and the service flow which needs to be transmitted in the air by using the cockpit non-IP links (HF, VHF, L-band guard and the like) is transmitted to an ACARS (access control and data reporting system) airborne terminal through an ACARS fusion layer, so that the non-IP link transmission is realized; the service flow which needs to be transmitted in the air and the ground by using the IP links (5G ATG, ku/Ka wave band guard, 5G aeroMACS, airport wireless communication and the like) is sent to the broadband link management airborne terminal through the IP fusion layer, so that the IP link transmission is realized; when the IP or non-IP link is interrupted, the link switching between the IP and the non-IP link can be carried out according to the state of the current link on the premise that the interrupt application is not perceived;
ACARS fusion layer: and providing transmission service based on ACARS network for the information of the broad and narrow band link core management layer. The ACARS fusion layer mainly comprises the following functions:
message codec: and the information of the broadband and narrowband link core management layer is encoded according to an ACARS character set format, and the received information is decoded at the opposite end.
Message life cycle management: carrying out message life cycle management on the messages of the broadband and narrowband link core management layer during transmission through the ACARS network;
message segmentation and reassembly: segmenting the information transmitted by the ACARS network to ensure that the length of the information is not more than the maximum length (less than 3520 characters) specified by ARINC 618 specification, and reorganizing the received information;
encrypting and decrypting the message: and encrypting the information of the broadband and narrowband link core management layer during transmission through the ACARS network, and decrypting the received information.
File transfer management: and carrying out file transmission management on the segmented message through a file transmission protocol.
Communication with the ACARS on-board terminal: as terminal application of ACARS, the terminal application communicates with an ACARS on-board terminal according to a standard data link protocol such as ARINC619 protocol, and provides ACARS message transmission service for messages of a broadband and narrowband link core management layer;
IP fusion layer: through the IP network communication service using the IP middleware, the message/data transmission service is provided for the broadband/narrowband link core management layer, and the main functions are as follows:
message life cycle management: message life cycle management is carried out on the messages of the broadband and narrowband link core management layer during the transmission through the IP network;
communication with the IP intermediate layer: the message can be transmitted safely and reliably based on the IP network through the IP middleware.
On the other hand, in the present invention concept, a new broadband/narrowband link switching mechanism is proposed, and the flow is shown in fig. 3, and specifically includes the following steps:
(1) The airborne terminal application layer initiates a data transmission request;
(2) The application interface adaptation layer adapts the interface according to the need and initiates a data request to the broadband and narrowband link core management layer;
(3) After being processed by the broadband and narrowband link core management layer, the link is selected according to the link priority configuration file and the current link state;
(4) When an IP link is selected, the data is processed through the IP convergence layer and then transmitted through the IP link. When the transmission is successful, the transmission is ended; and when the transmission is unsuccessful, returning to a link selection part in the broadband and narrowband link core management layer, judging whether to switch the link, and if so, selecting an ACARS link for transmission. If the final transmission fails, performing failure processing, and ending the message transmission;
(5) When an ACARS link is selected, data is processed through the ACARS fusion layer and then transmitted through the ACARS link. When the transmission is successful, the transmission is ended; and when the transmission is unsuccessful, returning to a link selection part in the broadband and narrowband link core management layer, judging whether to switch the link, and if the link can be switched, selecting an IP link for transmission. If the final transmission fails, NACK is sent to the application layer, and the message transmission is ended.
It should be noted that, within the scope of protection defined in the claims of the present invention, the following embodiments may be combined and/or expanded, and replaced in any manner that is logical from the above specific embodiments, such as the disclosed technical principles, the disclosed technical features or the implicitly disclosed technical features, etc.
Example 1
An air-to-ground transmission system supporting wide and narrow band link switching comprises a wide and narrow band link management module, a communication management module and a wide band link management module;
the wide and narrow band link management module interacts with the communication management module through an ARINC429 bus to realize air-to-ground message transmission based on ACARS, and interacts with the wide band link management module through the Ethernet to realize air-to-ground message transmission based on ACARS;
the communication management module is used for realizing the function of an ACARS protocol stack, interacting with the wide and narrow band link management module through an ARINC429 bus and interacting with the cabin marine sanitation device through the ARINC429 bus, supporting the routing, flow control and space and ground reliable transmission functions of data transmission of a cabin marine sanitation link non-IP link, and being responsible for space and ground data receiving and transmitting based on the non-IP link and seamless roaming and switching between the non-IP links;
the method comprises the steps of interacting with a broadband link management module through Ethernet and interacting with broadband link transmission equipment of an Ethernet cockpit, supporting the functions of routing, flow control and space-based reliable transmission of broadband link data transmission of the cockpit, and supporting seamless roaming and switching among IP links; and the analysis, routing and distribution of the ACARS messages are realized through the ACARS gateway.
Example 2
On the basis of embodiment 1, the wide-narrow link management module comprises an onboard wide-narrow link management module and a ground wide-narrow link management module, wherein the onboard wide-narrow link management module resides in the IMA platform or in the communication management module or in a separate wide-narrow link management device; the ground end broadband and narrowband link management module resides in a ground system server, supports seamless roaming and switching between a non-IP link and an IP link, supports data compression, encoding and decoding and encryption and decryption, and realizes ACARS-based segmented transmission and IP-based message transmission which accord with ARINC 841.
Example 3
On the basis of the embodiment 1, the broadband link management module comprises an airborne broadband link management module and a ground broadband link management module; the onboard broadband link management module resides in an information system server or resides in broadband link management equipment alone; the ground-side broadband link management module resides in a ground server.
Example 4
On the basis of the embodiment 1, the method further comprises the following steps: the ACARS air-to-ground communication link composed of HF, VHF, L wave band guard, HF ground station, VHF ground station and L wave band guard ground station is used for completing the air-to-ground ACARS message wireless transmission function.
Example 5
On the basis of the embodiment 1, the method further comprises the following steps: the air-to-ground broadband communication link is formed by the 5G ATG, the 5G aeroMACS, the Ku/Ka wave band guard link, the 5G ATG base station, the 5G aeroMACS base station and the Ku/Ka wave band guard ground station and is used for completing the air-to-ground broadband data wireless transmission function.
Example 6
Based on embodiment 1, the broadband and narrowband link management module specifically includes an application layer, an application interface adaptation layer, a broadband and narrowband link core management layer, an ACARS fusion layer, and an IP fusion layer;
the application layer is specifically an upper layer application residing in the terminal or in the wide and narrow band link management equipment, and the newly developed application performs message interaction with the ground end wide and narrow band link management module through a standard interface and a wide and narrow band link management module; the existing application performs message interaction with the ground end broadband and narrowband link management module through the access broadband and narrowband link management module which is not perceived by the application interface adaptation layer;
the application interface adaptation layer is used as an adaptation module to complete communication between the broadband and narrowband link core management layer and the terminal application, so that the terminal application is not perceived to access the broadband and narrowband link core management layer;
the broadband and narrowband link core management layer provides connectionless message service for the application layer, and is used for carrying out message interaction with the opposite-end broadband and narrowband link core management layer, and is irrelevant to a network for transmitting messages;
the ACARS fusion layer provides transmission service based on an ACARS network for the information of the broadband and narrowband link core management layer;
the IP convergence layer provides message/data transmission service for the broadband/narrowband link core management layer through the IP network communication service using the IP middleware.
Example 7
Based on embodiment 6, the broadband and narrowband link core management layer is capable of interacting both character-based messages and bit-based messages, and specifically includes implementing the following functions:
message number: numbering the messages of the application layer so as to facilitate message confirmation or retransmission;
message integrity check: calculating CRC value of the message and checking at the opposite end;
link selection and switching: defining a priority-based routing and switching strategy according to the security level, real-time performance and reliability requirements of a terminal application service flow, and transmitting the service flow needing to be subjected to air-ground transmission by using a cockpit non-IP link to an ACARS (access control information system) on-board terminal through an ACARS fusion layer to realize non-IP link transmission; the service flow which needs to be transmitted by the IP link in the air-to-ground mode is sent to the broadband link management airborne terminal through the IP fusion layer, so that the IP link transmission is realized; when the IP or non-IP link is interrupted, switching the links between the IP and the non-IP link according to the state of the current link on the premise that the interrupted application is not perceived;
and/or the number of the groups of groups,
message compression processing: for reducing the transmission data length of the empty section.
Example 8
On the basis of embodiment 6, the ACARS fusion layer specifically includes implementing the following functions:
message codec: the method comprises the steps of encoding a message of a broadband and narrowband link core management layer according to an ACARS character set format, and decoding the received message at an opposite end;
message life cycle management: carrying out message life cycle management on the messages of the broadband and narrowband link core management layer during transmission through the ACARS network;
message segmentation and reassembly: segmenting the information transmitted by the ACARS network to ensure that the length of the information is not more than the maximum length specified by ARINC 618 specification, and reorganizing the received information;
encrypting and decrypting the message: message encryption is carried out on the information of the broadband and narrowband link core management layer during transmission through the ACARS network, and received information is decrypted;
file transfer management: file transmission management is carried out on the segmented message through a file transmission protocol;
communication with the ACARS on-board terminal: as terminal application of ACARS, the terminal application communicates with an ACARS on-board terminal according to a standard data link protocol, and provides ACARS message transmission service for messages of a broadband and narrowband link core management layer.
Example 9
On the basis of embodiment 6, the IP convergence layer specifically includes implementing the following functions:
message life cycle management: message life cycle management is carried out on the messages of the broadband and narrowband link core management layer during the transmission through the IP network;
communication with the IP intermediate layer: the message can be transmitted safely and reliably based on the IP network through the IP middleware.
Example 10
An air-to-ground transmission method supporting wide and narrow band link switching, based on the air-to-ground transmission system supporting wide and narrow band link switching described in embodiment 6, performs the following steps:
s1, an airborne terminal application layer initiates a data transmission request;
s2, an application interface adaptation layer adapts the interface according to the need and initiates a data request to a broadband and narrowband link core management layer;
s3, after being processed by the broadband and narrowband link core management layer, selecting a link according to the link priority configuration file and the current link state;
s4, when the IP link is selected, the data is processed through the IP fusion layer and then transmitted through the IP link; when the transmission is successful, the transmission is ended; when the transmission is unsuccessful, returning to a link selection part in the broadband and narrowband link core management layer, judging whether to switch the link, and if the link can be switched, selecting an ACARS link for transmission; if the final transmission fails, performing failure processing, and ending the message transmission;
s5, when the ACARS link is selected, the data is processed through the ACARS fusion layer and then transmitted through the ACARS link; when the transmission is successful, the transmission is ended; when the transmission is unsuccessful, returning to a link selection part in the broadband and narrowband link core management layer, judging whether to switch the link, and if the link can be switched, selecting an IP link for transmission; if the final transmission fails, NACK is sent to the application layer, and the message transmission is ended.
The units involved in the embodiments of the present invention may be implemented by software, or may be implemented by hardware, and the described units may also be provided in a processor. Wherein the names of the units do not constitute a limitation of the units themselves in some cases.
According to an aspect of embodiments of the present invention, there is provided a computer program product or computer program comprising computer instructions stored in a computer readable storage medium. The computer instructions are read from the computer-readable storage medium by a processor of a computer device, and executed by the processor, cause the computer device to perform the methods provided in the various alternative implementations described above.
As another aspect, the embodiment of the present invention also provides a computer-readable medium that may be contained in the electronic device described in the above embodiment; or may exist alone without being incorporated into the electronic device. The computer-readable medium carries one or more programs which, when executed by the electronic device, cause the electronic device to implement the methods described in the above embodiments.
Claims (10)
1. The air-to-ground transmission system supporting wide and narrow band link switching is characterized by comprising a wide and narrow band link management module, a communication management module and a wide band link management module;
the wide and narrow band link management module interacts with the communication management module through an ARINC429 bus to realize air-to-ground message transmission based on ACARS, and interacts with the wide band link management module through the Ethernet to realize air-to-ground message transmission based on ACARS;
the communication management module is used for realizing the function of an ACARS protocol stack, interacting with the wide and narrow band link management module through an ARINC429 bus and interacting with the cabin marine sanitation device through the ARINC429 bus, supporting the routing, flow control and space and ground reliable transmission functions of data transmission of a cabin marine sanitation link non-IP link, and being responsible for space and ground data receiving and transmitting based on the non-IP link and seamless roaming and switching between the non-IP links;
the method comprises the steps of interacting with a broadband link management module through Ethernet and interacting with broadband link transmission equipment of an Ethernet cockpit, supporting the functions of routing, flow control and space-based reliable transmission of broadband link data transmission of the cockpit, and supporting seamless roaming and switching among IP links; and the analysis, routing and distribution of the ACARS messages are realized through the ACARS gateway.
2. The air-to-ground transmission system supporting wideband and narrowband link switching of claim 1, wherein the wideband and narrowband link management modules comprise an on-board end wideband and narrowband link management module and a ground end wideband and narrowband link management module, wherein the on-board end wideband and narrowband link management module resides in an IMA platform or in a communication management module or in a separate wideband and narrowband link management device; the ground end broadband and narrowband link management module resides in a ground system server, supports seamless roaming and switching between a non-IP link and an IP link, supports data compression, encoding and decoding and encryption and decryption, and realizes ACARS-based segmented transmission and IP-based message transmission which accord with ARINC 841.
3. The air-to-ground transmission system supporting wide and narrow band link switching of claim 1, wherein the wide band link management module comprises an on-board side wide band link management module and a ground side wide band link management module; the onboard broadband link management module resides in an information system server or resides in broadband link management equipment alone; the ground-side broadband link management module resides in a ground server.
4. The space-to-ground transmission system supporting wide narrowband link handoff of claim 1, further comprising: the ACARS air-to-ground communication link composed of HF, VHF, L wave band guard, HF ground station, VHF ground station and L wave band guard ground station is used for completing the air-to-ground ACARS message wireless transmission function.
5. The space-to-ground transmission system supporting wide narrowband link handoff of claim 1, further comprising: the air-to-ground broadband communication link is formed by the 5G ATG, the 5G aeroMACS, the Ku/Ka wave band guard link, the 5G ATG base station, the 5G aeroMACS base station and the Ku/Ka wave band guard ground station and is used for completing the air-to-ground broadband data wireless transmission function.
6. The air-to-ground transmission system supporting switching of wide and narrow links according to claim 1, wherein the wide and narrow link management module specifically comprises an application layer, an application interface adaptation layer, a wide and narrow link core management layer, an ACARS fusion layer and an IP fusion layer;
the application layer is specifically an upper layer application residing in the terminal or in the wide and narrow band link management equipment, and the newly developed application performs message interaction with the ground end wide and narrow band link management module through a standard interface and a wide and narrow band link management module; the existing application performs message interaction with the ground end broadband and narrowband link management module through the access broadband and narrowband link management module which is not perceived by the application interface adaptation layer;
the application interface adaptation layer is used as an adaptation module to complete communication between the broadband and narrowband link core management layer and the terminal application, so that the terminal application is not perceived to access the broadband and narrowband link core management layer;
the broadband and narrowband link core management layer provides connectionless message service for the application layer, and is used for carrying out message interaction with the opposite-end broadband and narrowband link core management layer, and is irrelevant to a network for transmitting messages;
the ACARS fusion layer provides transmission service based on an ACARS network for the information of the broadband and narrowband link core management layer;
the IP convergence layer provides message/data transmission service for the broadband/narrowband link core management layer through the IP network communication service using the IP middleware.
7. The air-to-ground transmission system supporting wideband and narrowband link switching of claim 6, wherein said wideband and narrowband link core management layer is capable of interacting both character-based and bit-based messages, and in particular comprising implementing the following functions:
message number: numbering the messages of the application layer so as to facilitate message confirmation or retransmission;
message integrity check: calculating CRC value of the message and checking at the opposite end;
link selection and switching: defining a priority-based routing and switching strategy according to the security level, real-time performance and reliability requirements of a terminal application service flow, and transmitting the service flow needing to be subjected to air-ground transmission by using a cockpit non-IP link to an ACARS (access control information system) on-board terminal through an ACARS fusion layer to realize non-IP link transmission; the service flow which needs to be transmitted by the IP link in the air-to-ground mode is sent to the broadband link management airborne terminal through the IP fusion layer, so that the IP link transmission is realized; when the IP or non-IP link is interrupted, switching the links between the IP and the non-IP link according to the state of the current link on the premise that the interrupted application is not perceived;
and/or the number of the groups of groups,
message compression processing: for reducing the transmission data length of the empty section.
8. The air-to-ground transmission system supporting switching of wide and narrow links according to claim 6, wherein said ACARS fusion layer specifically comprises the following functions:
message codec: the method comprises the steps of encoding a message of a broadband and narrowband link core management layer according to an ACARS character set format, and decoding the received message at an opposite end;
message life cycle management: carrying out message life cycle management on the messages of the broadband and narrowband link core management layer during transmission through the ACARS network;
message segmentation and reassembly: segmenting the information transmitted by the ACARS network to ensure that the length of the information is not more than the maximum length specified by ARINC 618 specification, and reorganizing the received information;
encrypting and decrypting the message: message encryption is carried out on the information of the broadband and narrowband link core management layer during transmission through the ACARS network, and received information is decrypted;
file transfer management: file transmission management is carried out on the segmented message through a file transmission protocol;
communication with the ACARS on-board terminal: as terminal application of ACARS, the terminal application communicates with an ACARS on-board terminal according to a standard data link protocol, and provides ACARS message transmission service for messages of a broadband and narrowband link core management layer.
9. The air-to-ground transmission system supporting wide and narrow band link switching of claim 6, wherein said IP convergence layer specifically comprises the following functions:
message life cycle management: message life cycle management is carried out on the messages of the broadband and narrowband link core management layer during the transmission through the IP network;
communication with the IP intermediate layer: the message can be transmitted safely and reliably based on the IP network through the IP middleware.
10. A space-to-ground transmission method supporting wide narrowband link switching, characterized by performing the following steps based on the space-to-ground transmission system supporting wide narrowband link switching of claim 6:
s1, an airborne terminal application layer initiates a data transmission request;
s2, an application interface adaptation layer adapts the interface according to the need and initiates a data request to a broadband and narrowband link core management layer;
s3, after being processed by the broadband and narrowband link core management layer, selecting a link according to the link priority configuration file and the current link state;
s4, when the IP link is selected, the data is processed through the IP fusion layer and then transmitted through the IP link; when the transmission is successful, the transmission is ended; when the transmission is unsuccessful, returning to a link selection part in the broadband and narrowband link core management layer, judging whether to switch the link, and if the link can be switched, selecting an ACARS link for transmission; if the final transmission fails, performing failure processing, and ending the message transmission;
s5, when the ACARS link is selected, the data is processed through the ACARS fusion layer and then transmitted through the ACARS link; when the transmission is successful, the transmission is ended; when the transmission is unsuccessful, returning to a link selection part in the broadband and narrowband link core management layer, judging whether to switch the link, and if the link can be switched, selecting an IP link for transmission; if the final transmission fails, NACK is sent to the application layer, and the message transmission is ended.
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