CN117320023A - Layered airborne network architecture - Google Patents

Layered airborne network architecture Download PDF

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Publication number
CN117320023A
CN117320023A CN202311268960.1A CN202311268960A CN117320023A CN 117320023 A CN117320023 A CN 117320023A CN 202311268960 A CN202311268960 A CN 202311268960A CN 117320023 A CN117320023 A CN 117320023A
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China
Prior art keywords
network
domain
access network
switch
data
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CN202311268960.1A
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Chinese (zh)
Inventor
许佳
王凯
刘海宁
王言伟
金业凯
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Shenyang Aircraft Design and Research Institute Aviation Industry of China AVIC
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Shenyang Aircraft Design and Research Institute Aviation Industry of China AVIC
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Priority to CN202311268960.1A priority Critical patent/CN117320023A/en
Publication of CN117320023A publication Critical patent/CN117320023A/en
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W16/00—Network planning, e.g. coverage or traffic planning tools; Network deployment, e.g. resource partitioning or cells structures
    • H04W16/18—Network planning tools
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
    • H04B10/25—Arrangements specific to fibre transmission
    • H04B10/2575—Radio-over-fibre, e.g. radio frequency signal modulated onto an optical carrier
    • H04B10/25752—Optical arrangements for wireless networks
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L69/00—Network arrangements, protocols or services independent of the application payload and not provided for in the other groups of this subclass
    • H04L69/08—Protocols for interworking; Protocol conversion
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W40/00—Communication routing or communication path finding
    • H04W40/02—Communication route or path selection, e.g. power-based or shortest path routing
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W40/00—Communication routing or communication path finding
    • H04W40/24—Connectivity information management, e.g. connectivity discovery or connectivity update
    • H04W40/248—Connectivity information update
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W84/00—Network topologies
    • H04W84/02—Hierarchically pre-organised networks, e.g. paging networks, cellular networks, WLAN [Wireless Local Area Network] or WLL [Wireless Local Loop]
    • H04W84/04—Large scale networks; Deep hierarchical networks
    • H04W84/06—Airborne or Satellite Networks

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Computer Security & Cryptography (AREA)
  • Data Exchanges In Wide-Area Networks (AREA)

Abstract

The application relates to a layered airborne network architecture, which comprises a backbone network and each domain access network, wherein each domain access network adopts a network design configured according to the needs of multiple protocols, the network architecture comprises domain access network sub-cards and domain access network switches, the hardware types of network cards are uniform, different network protocols are configured according to the needs of each domain, and an inter-domain network protocol conversion function is realized in each domain access network switch; the backbone network adopts an all-optical switching network based on WDM, the WDM switch is connected with the switch of each domain access network, and an optical fiber transmission path is provided for the information exchange between domains; the backbone network can adopt star topology, and support flexible access of access points and flexible wavelength configuration and route switching.

Description

Layered airborne network architecture
Technical Field
The application belongs to the technical field of airborne network design, and particularly relates to a layered airborne network architecture.
Background
Currently, when an airborne network is built, all sub-units in the system are respectively built by using an FC network, a 1394 bus and an ARINC818 network according to data transmission requirements in the units and among the units, in the communication process, data to be transmitted can be transmitted after being processed through sub-cards of different types and protocol conversion equipment, if communication among the sub-systems needs to be completed, the types and the number of related hardware equipment are more, larger negative effects are brought to the weight and maintainability of a task system, meanwhile, the data are sent from a sensor to a general data processing unit to be calculated through a plurality of sub-cards and data conversion, a large amount of time is occupied, and the requirements of a new generation of aircraft on the rapidity and the high efficiency of the information processing system cannot be met.
In addition, the construction of the airborne network is still a rigid structure which is interconnected by adopting a fixed protocol, the design based on a specific protocol cannot support flexible switching of protocol conversion modes of each port, the flexibility and the dilatability of the system networking are also greatly reduced due to the fixed bandwidth of each port, and due to the fixed internal switching topology structure, a communication model built according to a specific scene is difficult to adapt to a new application scene after task change, a great deal of time and cost are required for upgrading corresponding network and processing resources, the fixed internal working mode also enables the system to be incapable of flexibly switching among a plurality of working modes, and when no task is required, the corresponding network and task resources are in an idle state, the on-demand allocation and dynamic scheduling of resources cannot be realized according to the task requirements, and the waste of platform resources is serious.
The present application has been made in view of the existence of the above-mentioned technical drawbacks.
It should be noted that the above disclosure of the background art is only for aiding in understanding the inventive concept and technical solution of the present application, which is not necessarily prior art to the present application, and should not be used for evaluating the novelty and creativity of the present application in the case where no clear evidence indicates that the above content has been disclosed at the filing date of the present application.
Disclosure of Invention
It is an object of the present application to provide a hierarchical on-board network architecture that overcomes or mitigates at least one technical disadvantage of known existing aspects.
The technical scheme of the application is as follows:
1. a hierarchical airborne network architecture comprising a backbone network and domain access networks, wherein,
each domain access network adopts a network design configured according to the need of multiple protocols, and comprises a domain access network sub-card and a domain access network switch, wherein the hardware types of the network cards are uniform, different network protocols are configured according to the needs of each domain, and an inter-domain network protocol conversion function is realized in each domain access network switch;
the backbone network adopts an all-optical switching network based on WDM, the WDM switch is connected with the switch of each domain access network, and an optical fiber transmission path is provided for the information exchange between domains; the backbone network can adopt star topology, and support flexible access of access points and flexible wavelength configuration and route switching;
the data processed by the switch of access network of each domain enters the WDM switch through the optical channel, the wavelength division multiplexer separates the multiplexing optical signals composed of different wavelengths and sends the multiplexing optical signals into the all-optical switching unit, the all-optical switching unit distributes each individual wavelength signal to the optical switching switch of corresponding wavelength, feeds the optical switching switch to the wavelength division multiplexer for filtering and combining, and finally outputs the optical signals to the switch of access network of each domain through the optical channel.
In accordance with at least one embodiment of the present application, in the hierarchical airborne network architecture described above, the WDM switch may further be configured with a power management module, a memory module, a clock module, a controller module, and a health management module.
According to at least one embodiment of the present application, in the above-mentioned hierarchical airborne network architecture, each domain access network sub-card supports FC, SRIO, ETH, ARINC and TTE network protocols, data to be transmitted enters a multiprotocol interface unit through a high-speed serial physical interface, after protocol analysis is performed on the data by a protocol processing unit, the data is sent to a communication scheduling unit, scheduling and processing of a CPU are waited, the data processed by the CPU is sent back to the communication scheduling unit through a PCIE host interface, and after protocol encapsulation is performed by the protocol processing unit, the data is output by the multiprotocol interface unit;
the access network sub-cards of all domains support multiple redundancy mode configuration through a redundancy management unit to meet different service requirements, wherein the access network sub-cards are configured into a four-redundancy mode for safety key domains and a dual-redundancy mode for non-safety key domains;
each domain access network sub-card supports a high-precision time synchronization function of the distributed system through a clock synchronization unit;
the access network sub-cards of each domain are provided with a multi-protocol interface configuration unit which is responsible for the management control function of the access network sub-cards, interface protocols, message types and receiving modes are configured before operation, and the domain access network sub-card is initialized after operation.
According to at least one embodiment of the present application, in the hierarchical airborne network architecture, for each domain access network switch, if the data is intra-domain transmission, the data to be exchanged is loaded into a transmission queue after protocol conversion, and enters the exchange unit to perform corresponding exchange according to rule table information, and finally is output to a corresponding terminal through an output port, if the data is inter-domain transmission, the exchanged data is output to the WDM access unit through the transmission queue, and is sent to the WDM optical fiber to perform transmission after being coupled by a multiplexer.
Drawings
Fig. 1 is a schematic diagram of a hierarchical airborne network architecture provided in an embodiment of the present application;
fig. 2 is a schematic diagram of a WDM switch provided in an embodiment of the present application;
fig. 3 is a schematic diagram of a domain access network daughter card provided in an embodiment of the present application;
fig. 4 is a schematic diagram of a domain access network switch provided in an embodiment of the present application.
For the purpose of better illustrating the present embodiments, certain elements of the drawings may be omitted, enlarged or reduced and do not represent the actual product dimensions, and furthermore, the drawings are for illustrative purposes only and are not to be construed as limiting the present patent.
Detailed Description
In order to make the technical solution of the present application and the advantages thereof more apparent, the technical solution of the present application will be more fully described in detail below with reference to the accompanying drawings, it being understood that the specific embodiments described herein are only some of the embodiments of the present application, which are for explanation of the present application, not for limitation of the present application. It should be noted that, for convenience of description, only the portion relevant to the present application is shown in the drawings, and other relevant portions may refer to a general design, and without conflict, the embodiments and technical features in the embodiments may be combined with each other to obtain new embodiments.
Furthermore, unless defined otherwise, technical or scientific terms used in the description of this application should be given the ordinary meaning as understood by one of ordinary skill in the art to which this application belongs. The terms "upper," "lower," "left," "right," "center," "vertical," "horizontal," "inner," "outer," and the like as used in this description are merely used to indicate relative directions or positional relationships, and do not imply that a device or element must have a particular orientation, be configured and operated in a particular orientation, and that the relative positional relationships may be changed when the absolute position of the object being described is changed, and thus should not be construed as limiting the present application. The terms "first," "second," "third," and the like, as used in the description herein, are used for descriptive purposes only and are not to be construed as indicating or implying any particular importance to the various components. The use of the terms "a," "an," or "the" and similar referents in the description of the invention are not to be construed as limited in number to the precise location of at least one. As used in this description, the terms "comprises," "comprising," or the like are intended to cover an element or article that appears before the term and that is listed after the term and its equivalents, without excluding other elements or articles.
Furthermore, unless specifically stated and limited otherwise, the terms "mounted," "connected," and the like in the description herein are to be construed broadly and refer to either a fixed connection, a removable connection, or an integral connection, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can also be communicated with the inside of two elements, and the specific meaning of the two elements can be understood by a person skilled in the art according to specific situations.
The present application is described in further detail below with reference to fig. 1-4.
The embodiment of the application provides a hierarchical airborne network architecture, which is designed and constructed, and concretely can refer to the following process.
The method comprises the steps of disassembling system functions according to task requirements, analyzing processing flows of an airborne system under various function modes and different performance requirements, quantifying transmission requirements according to information flow analysis results, including room names such as transmission bandwidth, transmission rate, time delay, time synchronization, time certainty, expandability and the like, dividing different functional domains according to an airborne information processing system, and particularly constructing autonomous and highly cohesive switching networks of different areas according to the different functional domains, wherein the autonomous and highly cohesive switching networks are constructed according to the airborne information processing system, and realizing logical interconnection of the cross systems through data links among external machines by utilizing and disposing information gateways of the collaborative management domains.
A hierarchical airborne network architecture is designed, comprising a backbone network and access networks of various domains, as shown in fig. 1, wherein:
the backbone network adopts an all-optical switching network based on WDM, the WDM switch is connected with the switch of each domain access network, and a high-bandwidth, high-speed and long-distance optical fiber transmission path is provided for the information exchange between domains;
the network design of the multi-protocol on-demand configuration is adopted by each domain access network, the hardware types of the network cards are unified, different network protocols are configured according to the requirements of each domain, the inter-domain network protocol conversion function is realized in each domain access network switch, the hardware conversion replaces the traditional software conversion, and the conversion time delay is reduced.
The data processed by the switch of access network of each domain enters the WDM switch through the optical channel, the wavelength division multiplexer separates the multiplexing optical signals composed of different wavelengths to isolate each channel and sends the signals to the all-optical switching unit, and the all-optical switching unit distributes each individual wavelength signal to the optical switching switch of corresponding wavelength, then feeds the signals to the wavelength division multiplexer to filter and combine, and finally outputs the signals to the switch of access network of each domain through the optical channel, as shown in figure 2.
The WDM switch can be further provided with a power management module, a memory module, a clock module, a controller module, a health management module and other functional modules.
The WDM-based all-optical switching network can greatly increase transmission bandwidth through an optical multiplexing technology, meanwhile, a backbone network can adopt star topology, flexible access of an access point and flexible wavelength configuration and route switching are supported, and dynamic changes of tasks and loads of an avionics system can be well adapted.
Each domain access network adopts a network design of multi-protocol on-demand configuration, and comprises a domain access network sub-card and a domain access network switch.
Each domain access network sub-card can support a plurality of network protocols such as FC, SRIO, ETH, ARINC, TTE and the like, data to be transmitted enters the multi-protocol interface unit through the high-speed serial physical interface, the data is sent to the communication scheduling unit after protocol analysis by the protocol processing unit, the data waiting for scheduling and processing of the CPU is sent back to the communication scheduling unit through the PCIE host interface, and the data after processing by the CPU is output by the multi-protocol interface unit after protocol encapsulation by the protocol processing unit, as shown in figure 3.
The access network sub-card of each domain can support multiple redundancy mode configuration through the redundancy management unit to meet different service requirements, is generally configured into a four-redundancy mode for safety key domains such as a control domain and a electromechanical domain, and is generally configured into a dual-redundancy mode for non-safety key domains such as a task domain.
The sub-cards of the access network of each domain can support the high-precision time synchronization function of the distributed system through the clock synchronization unit, can realize multi-level global clock synchronization service between the inside and outside of the machine, between the inside and the outside of the machine, and between the backbone network and the access network of the domain, and provide support for multi-machine and multi-task cooperative data alignment.
The multi-protocol interface configuration unit is arranged in each domain access network sub-card and is responsible for the management control function of the access network sub-card, the interface protocol, the message type, the receiving mode and other information are configured in a software definition mode according to the service requirement before the system operates, and the domain access network sub-card is initialized after the system operates, so that the aim of configuration according to the requirement is fulfilled.
As shown in figure 4, the switch of each domain access network is formed by integrating a WDM optical access component and an access network switch, integrating a core switching scheduling unit and a wavelength division multiplexing and demultiplexing unit, and realizing the high-speed switching of multi-protocol data of subunits of each functional domain and the access of backbone network data. If the data is in-domain transmission, the data to be exchanged is loaded into a transmission queue after protocol conversion, enters an exchange unit for corresponding exchange according to rule table information, and is finally output to a corresponding terminal through an output port; if the data is inter-domain transmission, the exchanged data is output to the WDM access unit through the transmission queue, and is sent to the WDM optical fiber for transmission after being coupled by the multiplexer.
When the network equipment or the task load of the aircraft avionics system changes, the network controller can dynamically schedule according to the task demand, and send configuration information to each domain access network switch, and the switch units in each domain access network switch perform optical path switching according to the configuration content, so that the network structure can be flexibly configured, and the custom-made characteristics according to the requirement are realized.
According to the layered airborne network architecture, on the basis of function requirements and processing flow analysis of an airborne network, the network architecture is designed in a layered manner, a whole unified network is constructed, effective integration of network resources and capacity improvement are achieved, the weight, the volume and the cost of a system can be effectively reduced, the data flow transmission rate is accelerated, real-time sharing of system combat data is achieved, and combat capacity is deployed and dynamically generated according to requirements.
In the layered airborne network architecture, the backbone network adopts an all-optical switching network based on WDM, the transmission bandwidth is greatly increased through an optical multiplexing technology, star topology is adopted, flexible wavelength configuration and route switching are supported, the organic integration of service inheritance and network capacity improvement can be realized, each domain access network adopts a network design of multi-protocol on-demand configuration, a domain access network sub-card can support FC, SRIO, ETH, ARINC and TTE multiple network protocols, multiple redundancy modes are supported according to different service demands, a domain access switch realizes the conversion of the network protocols through hardware, the high-speed exchange of multi-protocol data of each functional domain sub-unit and the access of backbone network data can be realized, and when the network equipment or task load of the avionics system changes, the network structure can be flexibly configured, so that the on-demand customization characteristic is realized.
The layered airborne network architecture adopts an airborne unified network, can open the gaps among the sensing domain, the task domain and the control domain, realizes global interconnection, has a unified configuration of the physical resources of the airborne network, greatly reduces the types of modules, reduces the cost, improves the maintainability and supports flexible migration of processing functions.
According to the layered airborne network architecture, an optical fiber technology is adopted to replace an original coaxial cable to connect all subsystems, so that performance parameters such as weight and volume of an aircraft can be reduced, and the optical fiber has the characteristics of high bandwidth, high speed, electromagnetic interference resistance and the like, and can well meet the requirements of avionic network transmission;
the layered airborne network architecture can realize flexible configuration of various network protocols such as FC, SRIO, ETH, ARINC818, TTE and the like in a software-defined mode, and meet various business data transmission requirements such as strong real-time/weak real-time, safety key/non-safety key, periodic class/event class and the like.
The layered airborne network architecture supports layered network construction of access networks and backbone networks of all domains, has large-scale and diversified node dynamic access, can ensure the expandability of the network, can be networked according to requirements, can effectively utilize network bandwidth resources, and supports software definition function coordination;
the layered airborne network architecture can reduce interface conversion equipment, changes the protocol conversion from software implementation into pure hardware implementation, has low protocol conversion time delay and high conversion efficiency, and supports high-speed transmission of multi-service data streams and real-time sharing of combat data.
In the description, each embodiment is described in a progressive manner, and each embodiment is mainly described by the differences from other embodiments, so that the same similar parts among the embodiments are mutually referred.
Having thus described the technical aspects of the present application with reference to the preferred embodiments illustrated in the accompanying drawings, it should be understood by those skilled in the art that the scope of the present application is not limited to the specific embodiments, and those skilled in the art may make equivalent changes or substitutions to the relevant technical features without departing from the principles of the present application, and those changes or substitutions will now fall within the scope of the present application.

Claims (4)

1. A hierarchical airborne network architecture comprising a backbone network and domain access networks, wherein,
each domain access network adopts a network design configured according to the need of multiple protocols, and comprises a domain access network sub-card and a domain access network switch, wherein the hardware types of the network cards are uniform, different network protocols are configured according to the needs of each domain, and an inter-domain network protocol conversion function is realized in each domain access network switch;
the backbone network adopts an all-optical switching network based on WDM, the WDM switch is connected with the switch of each domain access network, and an optical fiber transmission path is provided for the information exchange between domains; the backbone network can adopt star topology, and support flexible access of access points and flexible wavelength configuration and route switching;
the data processed by the switch of access network of each domain enters the WDM switch through the optical channel, the wavelength division multiplexer separates the multiplexing optical signals composed of different wavelengths and sends the multiplexing optical signals into the all-optical switching unit, the all-optical switching unit distributes each individual wavelength signal to the optical switching switch of corresponding wavelength, and the optical switching unit feeds the optical signals to the wavelength division multiplexer for filtering and combination, and finally outputs the optical signals to the switch of access network of each domain through the optical channel.
2. The hierarchical on-board network architecture of claim 1, wherein,
the WDM switch can be further provided with a power management module, a memory module, a clock module, a controller module and a health management module.
3. The hierarchical on-board network architecture of claim 1, wherein,
each domain access network sub-card supports FC, SRIO, ETH, ARINC and TTE network protocols, data to be transmitted enters a multi-protocol interface unit through a high-speed serial physical interface, the protocol processing unit analyzes the protocol of the data and then sends the data to a communication scheduling unit, the data waiting for the scheduling and processing of a CPU (central processing unit) is sent back to the communication scheduling unit through a PCIE host interface, and the data after being processed by the CPU is output by the multi-protocol interface unit after being subjected to protocol encapsulation through the protocol processing unit;
the access network sub-cards of all domains support multiple redundancy mode configuration through a redundancy management unit to meet different service requirements, wherein the access network sub-cards are configured into a four-redundancy mode for safety key domains and a dual-redundancy mode for non-safety key domains;
each domain access network sub-card supports a high-precision time synchronization function of the distributed system through a clock synchronization unit;
the access network sub-cards of each domain are provided with a multi-protocol interface configuration unit which is responsible for the management control function of the access network sub-cards, interface protocols, message types and receiving modes are configured before operation, and the domain access network sub-card is initialized after operation.
4. The hierarchical on-board network architecture of claim 1, wherein,
for each domain access network exchanger, if the data is in-domain transmission, the data to be exchanged is loaded into a transmission queue after protocol conversion, enters the exchange unit for corresponding exchange according to rule table information, and is finally output to a corresponding terminal through an output port, if the data is in-domain transmission, the exchanged data is output to a WDM access unit through the transmission queue, and is transmitted to a WDM optical fiber for transmission after being coupled by a multiplexer.
CN202311268960.1A 2023-09-28 2023-09-28 Layered airborne network architecture Pending CN117320023A (en)

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Application Number Priority Date Filing Date Title
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