CN105049308B - A kind of adaptive BC and its operation method based on protocol conversion bridge - Google Patents
A kind of adaptive BC and its operation method based on protocol conversion bridge Download PDFInfo
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Abstract
The invention discloses a kind of adaptive BC and its operation method based on protocol conversion bridge, adaptive BC includes optical module, FC protocol process module, adaptive link condition judgment module, protocol conversion module and emulation backup BC modules, optical module, adaptive link condition judgment module and protocol conversion module are connect with FC protocol process module, emulate backup BC modules and protocol conversion module is connect with adaptive link condition judgment module.Optical module receives the FC frames of FC networks and converts optical signals into as electric signal, for FC protocol process module by effective content transmission of FC frames to protocol conversion module, FC protocol process module judges that the information that will determine that after the link connection state information that optical module exports is transferred to adaptive link condition judgment module.Adaptive link condition judgment module selects protocol conversion module or emulation backup BC modules as operational module respectively according to the on off operating mode of FC links.The present invention can maintain the normal operation of MIL STD 1553B buses when the FC links of bridging device disconnect.
Description
Technical field
It is specifically a kind of based on the adaptive BC of protocol conversion bridge and its operation side the present invention relates to aviation electronics field
Method.
Background technology
Bus network in aviation electronics field is undergoing by the evolution of MIL-STD-1553B to FC networks.Although
FC networks substitute MIl-STD-1553B bus network with surprising rapidity with high bandwidth and its good real-time, still
MIL-STD-1553B buses are widely used for many years in aviation electronics field, existing FC networks be difficult substitute it completely, so
How to allow two kinds of networks coexisted in aviation electronic bus be many people research at present project.
In order to meet the above demand, the aviation electronics environment subcommittee of FC has investigated a set of compatible MIL-STD-1553B
FC networks and MIL-STD- may be implemented by the special mapping relations of the agreement in the agreement of bus --- FC-AE-1553
Data communication between 1553B buses.Wherein, the equipment that can realize the mapping relations is known as assisting in FC-AE-1553 agreements
Discuss bridge device.
The remote terminal of all carries in the MIL-STD-1553B buses bridged at present（RT）Pass through the net in FC networks
Network controller（NC）It controls, in order to ensure the stability of communication network, the double remainings of traditional aviation electronic bus generally use
Design ensures that when a network controller NC goes offline, remaining network controller NC can continue to run.However, being set in bridge joint
When standby optical fiber disconnects, all MIL-STD-1553B which is connected will lose the control of NC, in paralysis shape
State, this can influence the normal operation of MIL-STD-1553B buses.
Invention content
It is an object of the invention to overcome the deficiencies of the prior art and provide a kind of adaptive BC based on protocol conversion bridge
And its operation method, the normal operation of MIL-STD-1553B buses can be also maintained when the FC links of bridging device disconnect.
The present invention, which solves the above problems, to be achieved through the following technical solutions：It is a kind of based on the adaptive of protocol conversion bridge
BC, including optical module, FC protocol process module, adaptive link condition judgment module, protocol conversion module and emulation backup BC
Module, wherein：
Optical module is used to receive the FC frames of FC networks and converts optical signals into as electric signal；
FC protocol process module is connected with optical module, protocol conversion module and adaptive link condition judgment module, right
FC content frames and FC primitive contents carry out validity judgement, and by effective content transmission of FC frames to protocol conversion module；FC is assisted
View processing module also judges the link connection state information of optical module output, and link-state information is transferred to adaptively
Link state judgment module；
Adaptive link condition judgment module is also connected with emulation backup BC modules and protocol conversion module, is assisted according to FC
The make-and-break status information of the FC links of processing module output is discussed to select input data source, selects agreement to turn when FC links are connected
Change the mold input data source of the block as MIL-STD-1553B buses, select to emulate when FC links disconnect backup BC modules as
The input data source of MIL-STD-1553B buses；
Protocol conversion module is used to receive the FC content frames of FC protocol process module output, is assisted according to FC-AE-1553
Specific mapping is made in the requirement of view, and will be in the data transmission after mapping to MIL-STD-1553B buses；
Backup BC modules are emulated, are used to receive bus marco table, and advised according to bus marco table when FC links are disconnected
Fixed message sending cycle controls MIL-STD-1553B buses.
It is further, a kind of for the transmission of buffered data in the present invention because the message transmission rate of FC networks is higher
Adaptive BC based on protocol conversion bridge further includes DDR2 controllers, and the DDR2 controllers are arranged in FC protocol process module
On the circuit being connect with protocol conversion module, the data for being used to FC protocol process module being transferred to protocol conversion module carry out
Protocol conversion module is transmitted to after caching again.
Further, a kind of adaptive BC based on protocol conversion bridge, further includes USB controller, the USB controller with
It emulates backup BC modules to be connected, is used to the bus marco table of reception being transferred to emulation backup BC modules.The present invention is specific
When implementation, the interface between hardware and PC of the invention is not limited to USB interface, and PCIE, PCI, RS232, RJ45 also can be used
It is realized Deng other interfaces.
Further, a kind of adaptive BC based on protocol conversion bridge, further includes MIL-STD-1553B transceivers, described
Protocol conversion module and emulation backup BC modules are connected with MIL-STD-1553B transceivers, and protocol conversion module and emulation
Backup BC modules transfer data to MIL-STD-1553B buses by MIL-STD-1553B transceivers.
A kind of operation method of the adaptive BC based on protocol conversion bridge, includes the following steps：
Step 1: in protocol bridge initializtion protocol bridge device after the power is turned on, and by emulate backup BC modules receive it is spare total
Line traffic control is tabulated and spare configuration parameter；
Step 2: adaptive link condition judgment module judge in optical module FC links whether normal ON, connect if normal
It is logical, the control emulation backup BC modules closing of adaptive link condition judgment module, command frame, the data frame that the NC of FC networks is sent out
Become the command word and data word that MIL-STD-1553B can be identified by protocol conversion module mapping；If non-normal ON, from
It adapts to link state judgment module control emulation backup BC modules to start, MIL-STD-1553B buses, which bring into operation, to be powered on initially
The bus marco table loaded when change；
Step 3: step 2 is repeated, until protocol bridge, which is closed, terminates operation.Wherein, the present invention under normal conditions, FC chains
Line state is normal, and emulation backup BC modules are closed, and bridge joint 1553B buses are controlled by NC, after FC links disconnect, emulates backup BC
Module starts, and bridge joint 1553B buses are by emulation backup BC modules control.When protocol conversion module is run, agreement turns the present invention
Change the mold block also becomes status frames and data by the RT of carry in the MIL-STD-1553B buses status words replied and data word mapping
Frame replies to the NC of FC networks.
Further, the bus marco table includes the subframe of multiple ordered arrangements, and each subframe includes a plurality of orderly row
The message of cloth, wherein message is the minimum unit that user sends, including command word, status word and data word, is disappeared in each subframe
The quantity of breath is no more than 256；Each message in poll bus control table always when backup BC modules start is emulated, and is pressed
The time slice that bus marco table distributes sends message.
In conclusion the invention has the advantages that：The present invention is by being arranged adaptive link condition judgment module
With emulation backup BC modules, can be monitored in real time by adaptive link condition judgment module and automatic identification in present invention application
The on off operating mode of FC networks, FC networks under normal circumstances, adaptive link condition judgment module select protocol conversion module make
For the data input pin of MIL-STD-1553B buses, the backup BC in protocol bridge is in unactivated state, MIL-STD-1553B
The RT of bus is completely controlled by the NC of FC networks, and when FC networks disconnect, adaptive link condition judgment module opens emulation
Backup BC modules, MIL-STD-1553B buses are still up at this time, but are no longer controlled by the NC of FC networks, but controlled
In emulation backup BC, the message in bus is in backup BC in protocol bridge initialization procedure just designated good bus table.
In this way, the present invention is when protocol bridge FC network links disconnect, MIL-STD-1553B buses also can autonomous operation.
Description of the drawings
Structure when Fig. 1 is NC in external PC, MIL-STD-1553B bus of a specific embodiment of the invention and FC networks
Schematic diagram；
Fig. 2 is the work flow diagram of a specific embodiment of the invention.
Specific implementation mode
With reference to embodiment and attached drawing, detailed description further, but embodiments of the present invention are done to the present invention
It is without being limited thereto.
Embodiment 1：
As shown in Figure 1, a kind of adaptive BC based on protocol conversion bridge, including it is optical module, FC protocol process module, adaptive
Answer link state judgment module, protocol conversion module and emulation backup BC modules, optical module, adaptive link condition judgment module
And protocol conversion module is connect with FC protocol process module, emulate backup BC modules and protocol conversion module with adaptive chain
Line state judgment module connects.The optical module of the present embodiment is used to receive the FC frames of FC networks and converts optical signals into as telecommunications
Number, the optical signal of optical module output includes FC content frames and FC protocol modeling language contents, and FC protocol process module is transmitted according to FC assists
View carries out validity judgement to FC content frames and FC primitive contents, and by effective content transmission of FC frames to protocol conversion module,
The FC protocol process module of the present embodiment also judges the link connection state information of optical module output, and by link state
Information is transferred to adaptive link condition judgment module.Adaptive link condition judgment module is exported according to FC protocol process module
The make-and-break status informations of FC links select input data source, select protocol conversion module as MIL- when FC links are connected
The input data source of STD-1553B buses selects emulation backup BC modules total as MIL-STD-1553B when FC links disconnect
The input data source of line.The protocol conversion module of the present embodiment is used to receive the FC content frames of FC protocol process module output, root
Specific mapping is made according to the requirement of FC-AE-1553 agreements, and will be in the data transmission after mapping to MIL-STD-1553B buses.
The emulation backup BC modules of the present embodiment are provided when FC links are disconnected according to bus marco table for receiving bus marco table
Message sending cycle control MIL-STD-1553B buses.Wherein, the mapping that protocol conversion module is made includes command frame-
The mapping of command word, data frame-data word and status frames-status word, emulation backup BC modules have complete MIL-STD-
1553B bus control unit functions, including bus table is defined, send command word, data word, reception state word, data word etc..
The adaptive BC of the present embodiment（Adaptive bus control unit）In application, optical module passes through in optical fiber and FC networks
Network controller（NC）Connection, in this way, the FC frames that NC is sent out are passed to optical module by FC networks by optical fiber.When the present embodiment is applied
The backup external PC of BC modules is emulated, bus marco table is specified by the software being equipped in PC.
As shown in Fig. 2, when the adaptive BC operations of the present embodiment, include the following steps：Step 1: powering on beginning, initially
Change equipment, issues bus marco table；Step 2: judge FC links whether normal ON, connect if normal, then enter step three,
Otherwise four are entered step；Step 3: emulation backup BC modules are closed, protocol conversion module is started to work；Step 4: emulation backup
BC modules start, and poll sends preset bus marco table message；Step 5: step 2~step 4 is repeated, until protocol bridge is closed
Close end operation.The specific implementation step of step 1 is in the present embodiment：In protocol bridge initializtion protocol bridge device after the power is turned on, and
Spare bus marco table and spare configuration parameter are issued from software to emulation backup BC modules.Step 2 exists in the present embodiment
When implementation, the connection status of FC links is timely captured by adaptive link condition judgment module.The step of the present embodiment three
Protocol conversion module carries out following processing in the specific implementation：Command frame that protocol conversion module sends out the NC of FC networks, number
Become the command word and data word that MIL-STD-1553B can be identified according to frame mapping.In this way, the present embodiment is in application, adaptive
Link state judgment module control always synchronization emulation backup BC modules and protocol conversion module only there are one working.
The bus marco table of the present embodiment includes the subframe of multiple ordered arrangements, and each subframe includes a plurality of ordered arrangement
Message, wherein message is the minimum unit that user sends, including command word, status word（Broadcast the message no status word）And number
According to word, the quantity of message is no more than 256 in each subframe.It emulates when backup BC modules start in poll bus control table always
Each message, and the time slice distributed by bus marco table sends message.In the present embodiment message interval can by with
Family is self-defined, and it is 1 us to differentiate forthright and sincere, and the time for sending a subframe is known as the minor cycle, minimum support 1ms, the message in subframe
The summation at interval was necessarily less than equal to the minor cycle, and all message in endless subframe are otherwise sent in the minor cycle.In the present embodiment
The set of multiple subframes constitutes prime frame, i.e., entire bus marco table, and the time for sending a prime frame is known as a large period.This reality
The data structure for applying bus marco table in example also can be used a two-dimensional array to indicate, the first dimension is message index, two-dimensional representation
Minor cycle indexes, and the two confirms absolute position of the message in bus table jointly.It is expressed as defining this when value is 0 and disappear
Breath indicates there is this message in the minor cycle when value is 1.
Embodiment 2：
The present embodiment is made that restriction further below on the basis of embodiment 1：The adaptive BC of the present embodiment is also wrapped
Include DDR2 controllers, wherein DDR2 controllers are arranged on the circuit that FC protocol process module is connect with protocol conversion module, such as
This, FC protocol process module is transferred to the data of protocol conversion module and need to be cached through DDR2 controllers when the present embodiment is applied
It is transmitted to protocol conversion module again afterwards.
Embodiment 3：
The present embodiment is made that restriction further below on the basis of embodiment 1 or embodiment 2：The present embodiment it is adaptive
It further includes USB controller to answer BC, wherein USB controller by USB3.0 interfaces with emulation backup BC modules be connected, be used for by
The bus marco table of reception is transferred to emulation backup BC modules.The present embodiment is in system electrification, by USB controller by MIL-
Bus marco table spare STD-1553B and spare configuration parameter are transferred to emulation backup BC modules.
Embodiment 4：
The present embodiment is made that limit further below in 1~embodiment of embodiment 3 on the basis of any one embodiment
It is fixed：The adaptive BC of the present embodiment further includes MIL-STD-1553B transceivers, wherein the MIL-STD-1553B of the present embodiment is received
Hair device is connected with BJ77 connectors, and protocol conversion module and emulation backup BC modules are connected with MIL-STD-1553B transceivers,
MIL-STD-1553B transceivers are connected with BJ77 connectors, and are connected with MIL-STD-1553B buses by Shielded Twisted Pair, such as
This, the present embodiment in application, protocol conversion module mapping after MIL-STD-1553B command words, data word, and emulation backup
The data of BC modules output are sent to MIL-STD- by MIL-STD-1553B transceivers, BJ77 connectors and Shielded Twisted Pair
In 1553B buses.The present embodiment in the specific implementation, when FC link states are normal, emulation backup BC modules closing, not to
MIL-STD-1553B transceivers transmit any data content, and when FC link states disconnect, emulation backup BC modules start, to
Command word and data word content in MIL-STD-1553B transceiver transmission backup bus marco tables.
The above content is combine specific preferred embodiment to the further description of the invention made, and it cannot be said that originally
The specific implementation mode of invention is confined to these explanations.For those of ordinary skill in the art to which the present invention belongs,
The other embodiment obtained in the case where not departing from technical scheme of the present invention, should be included within the scope of the present invention.
Claims (4)
1. a kind of adaptive BC based on protocol conversion bridge, which is characterized in that including optical module, FC protocol process module, adaptive
Link state judgment module, protocol conversion module and emulation backup BC modules are answered, wherein：
Optical module is used to receive the FC frames of FC networks and converts optical signals into as electric signal；
FC protocol process module is connected with optical module, protocol conversion module and adaptive link condition judgment module, to FC frames
Content and FC primitive contents carry out validity judgement, and by effective content transmission of FC frames to protocol conversion module；At FC agreements
Reason module also judges the link connection state information of optical module output, and link-state information is transferred to adaptive link
Condition judgment module；
Adaptive link condition judgment module is also connected with emulation backup BC modules and protocol conversion module, at FC agreements
The make-and-break status information of the FC links of module output is managed to select input data source, protocol conversion mould is selected when FC links are connected
Input data source of the block as MIL-STD-1553B buses selects emulation backup BC modules as MIL- when FC links disconnect
The input data source of STD-1553B buses；
Protocol conversion module is used to receive the FC content frames of FC protocol process module output, according to FC-AE-1553 agreements
It is required that specific mapping is made, and will be in the data transmission after mapping to MIL-STD-1553B buses；
Backup BC modules are emulated, are used to receive bus marco table, and when FC links are disconnected according to as defined in bus marco table
Message sending cycle controls MIL-STD-1553B buses.
2. a kind of adaptive BC based on protocol conversion bridge according to claim 1, which is characterized in that further include DDR2 controls
Device processed, the DDR2 controllers are arranged on the circuit that FC protocol process module is connect with protocol conversion module, are used for FC
Protocol process module be transferred to protocol conversion module data cached after be transmitted to protocol conversion module again.
3. a kind of adaptive BC based on protocol conversion bridge according to claim 1, which is characterized in that further include USB controls
Device processed, the USB controller are connected with emulation backup BC modules, are used to the bus marco table of reception being transferred to emulation backup
BC modules.
4. a kind of adaptive BC based on protocol conversion bridge according to any one of claims 1 to 3, feature exist
In further including MIL-STD-1553B transceivers, the protocol conversion module and emulation backup BC modules are and MIL-STD-
1553B transceivers are connected, and protocol conversion module and emulation backup BC modules are by MIL-STD-1553B transceivers by data
It is sent to MIL-STD-1553B buses.
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107666415B (en) * | 2017-09-07 | 2020-11-03 | 北京京东尚科信息技术有限公司 | Optimization method and device of FC-AE-1553 protocol bridge |
| CN108923537B (en) * | 2018-07-14 | 2020-07-07 | 东方电子股份有限公司 | Intelligent substation maintenance method based on link switching |
| CN109491950B (en) * | 2018-09-26 | 2020-07-03 | 北京时代民芯科技有限公司 | A simplified system interface 1553B remote terminal circuit |
| CN109587029A (en) * | 2018-11-29 | 2019-04-05 | 北京计算机技术及应用研究所 | FC-AE-1553 bus and MIL-STD-1553B bus non-transparent bridge welding system |
| CN113114549B (en) * | 2021-03-16 | 2022-09-16 | 国营芜湖机械厂 | Integrated simulation system of avionics system with hybrid bus structure |
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