CN108134725A - A kind of data communications method of NC and NT - Google Patents
A kind of data communications method of NC and NT Download PDFInfo
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- CN108134725A CN108134725A CN201711337711.8A CN201711337711A CN108134725A CN 108134725 A CN108134725 A CN 108134725A CN 201711337711 A CN201711337711 A CN 201711337711A CN 108134725 A CN108134725 A CN 108134725A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L12/00—Data switching networks
- H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
- H04L12/40—Bus networks
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L12/00—Data switching networks
- H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
- H04L12/40—Bus networks
- H04L12/40006—Architecture of a communication node
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L12/00—Data switching networks
- H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
- H04L12/40—Bus networks
- H04L2012/40267—Bus for use in transportation systems
- H04L2012/4028—Bus for use in transportation systems the transportation system being an aircraft
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- Computer Networks & Wireless Communication (AREA)
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Abstract
The present invention relates to the data communications methods of NC and NT a kind of, are related to time and frequency measurement technical field.In the present invention, network controller (NC) and the network terminal (NT) are communicated using a kind of ethernet communication method (1553oE) based on 1553B agreements.The present invention has the certainty and real-time of 1553B, can be compatible with traditional 1553B equipment；But also with Ethernet high speed and low cost the features such as, bus data transfer rate can be improved, the development of modern aerospace bus system can be met.
Description
Technical field
The present invention relates to Ethernet communication technology fields, and in particular to the data communications method of NC and NT a kind of.
Background technology
The update upgrading of aerospace vehicle, the rate of the 1Mb/s of traditional 1553B buses far can not meet in recent years
Big quantity, the high speed transmission demand such as video, voice, has been increasingly becoming the bottleneck of aerospace bus system development.It is navigating
Empty space industry, great amount of terminals use 1553B agreements, and new bus system has to compatible traditional 1553B equipment, realizes total
The graceful upgrade of linear system system.
In recent years, ethernet technology has obtained development at full speed.Ethernet is a kind of open network of standard；Data pass
Defeated rate is high, supports 10Mbps, 100Mbps, 1Gbps and 10Gbps；Support a variety of physical mediums and flexible topological structure；Into
Originally it is and low-cost.Above-mentioned advantage causes Ethernet to obtain extremely wide application, has become the skill of business telecommunication mainstream
Art.
Complete autonomy between each terminal device of Ethernet, send and receive packets do not have unified management and control, are occupying ether
Conflict is generated on network bus, competition bus bandwidth brings uncertainty.Ethernet is being applied to aerospace field bus system
In encounter very big resistance.
Invention content
(1) technical problems to be solved
The technical problem to be solved by the present invention is to：How to realize with similar 1553B buses real-time, certainty and ether
The ethernet communication system of network bus high speed low cost, and the 1553B bus apparatus that the ethernet communication system compatible is traditional,
And a kind of data communications method of NC and NT is realized based on the system.
(2) technical solution
The ethernet communication system based on 1553B agreements is utilized in order to solve the above technical problem, the present invention provides a kind of
The NC and the data communications method of NT that system is realized, the system include network controller NC and network terminal NT, pass through Ethernet
Exchange network realizes the interconnection of NC, NT, and NC and NT is the network equipment, is assisted between each network equipment using a kind of based on 1553B
The ethernet communication method of view communicates, and it is real using 1553oE Ethernets to be somebody's turn to do the ethernet communication method based on 1553B agreements
Existing, the 1553oE Ethernets are referred to as 1553oE, and the 1553oE is defined as：Meet seven layer network models of OSI, only in OSI
Increase 1553oE control sublayers in the data link layer of seven layer network models, be used to implement the communication based on 1553B agreements；It is described
The frame structure of 1553oE includes destination address, source address, type/length, 1553oE frame heads, upper layer protocol data and FCS verifications；
The control of 1553oE and status display are determined that 1553oE frame heads are different according to definition, represent command frame respectively by 1553oE frame heads
Head, state frame head and data frame head；1553oE command frames, status frames and data frame carry out Ethernet by ethernet switched network
Frame switch, source address is the MAC Address of sending device in 1553oE command frames, status frames and data frame, and destination address is receives
The MAC Address of equipment；The ethernet switched network only according to the destination address of 1553oE command frames, status frames and data frame into
Row ethernet frame exchanges, and exchanges to and correctly receives the network equipment；
The network controller NC of the 1553oE, it is any for the data transmission of NT terminals each in management scheduling system
When etching system in have and only there are one NC to work, NC can send 1553oE command frames and data frame to NT, can receive NT hairs
The 1553oE status frames and data frame sent, NC have unique MAC Address in ethernet switched network；
The network terminal NT of the 1553oE, it is impossible to actively initiate data transmission, need to realize data by the management and dispatching of NC
Transmission, NT can receive the 1553oE command frames and data frame of NC transmissions, can send 1553oE status frames and data frame to NC,
NT has unique MAC Address in ethernet switched network；
This method includes the following steps：
1) NC sends 1553oE command frames to NT, and command frame can carry data or follow data frame, command frame and is sent out to NT
The source address of the data frame sent is the MAC Address of NC, and destination address is the MAC Address of NT；
2) ethernet switched network only carries out ethernet frame exchange according to the destination address of 1553oE command frames and data frame,
By the network port where command frame and data frames exchange to NT；
3) NT receives command frame and data frame, and status frames are sent to NC, and status frames can carry data or follow data frame,
Status frames and MAC Address of the source address for NT to the NC data frames sent, destination address is the MAC Address of NC；
4) ethernet switched network only carries out ethernet frame exchange according to the destination address of 1553oE status frames and data frame,
By the network port where status frames and data frames exchange to NC；
5) status frames or status frames and data frame that NC receptions NT is sent, complete data communication.
Preferably, 1553oE command frames are used to implement the order of 1553 agreements, optional carrying data, when 1553oE command frames
Length be less than Ethernet minimum frame length when, filling supply frame length；When the length of 1553oE command frames is more than Ethernet largest frames
When long, split into command frame and, one or more data frames；
1553oE status frames are used to implement the response of 1553 agreements, optional carrying data；When the length of 1553oE status frames
During less than Ethernet minimum frame length, frame length is supplied in filling；When the length of 1553oE status frames is more than Ethernet maximum frame length, tear open
Be divided into status frames and, one or more data frames；
1553oE data frames are not used alone, and command frame or status frames are followed, for data transmission；
1553oE is used to implement the data transmission of 1553B agreements, and the network controller NC of 1553oE is equivalent to 1553B buses
BC, the network terminal NT of 1553oE is equivalent to the RT of 1553B buses, the NC of 1553oE for sending command frame and data frame,
The NT of 1553oE is used to send status frames and data frame.
Preferably, 1553oE realizes that the data transfer mode of the RT of BC to the 1553B buses of 1553B buses is 1553oE's
NC sends command frame, carries data, optional transmission data frame；The NT of 1553oE carries out reception processing, is carried out to the NC of 1553oE
Response sends status frames, does not carry data；
1553oE realizes that the NC that the data transfer mode of the BC of RT to the 1553B buses of 1553B buses is 1553oE is sent
Command frame does not carry data, and the NT of 1553oE carries out reception processing, responded to the NC of 1553oE, sends status frames, carries
Data, optional transmission data frame；
1553oE realizes various mode codes of the 1553B for control, and during the transmission of 1553oE mode codes, mode code command frame
The value in the subaddressing domain of head is full 0 or complete 1；1553oE realizes the biography of the mode code of the RT of BC to the 1553B buses of 1553B buses
The NC that defeated mode is 1553oE sends command frame, and form is mode code order frame head+mode code+filling；The NT of 1553oE is carried out
Reception is handled, and is responded to the NC of 1553oE, sends status frames, and form is state frame head+filling；
1553oE realizes that the NC that the mode code transmission mode of the BC of RT to the 1553B buses of 1553B buses is 1553oE is sent out
Command frame is sent, form is mode code order frame head+filling；The NT of 1553oE carries out reception processing, is rung to the NC of 1553oE
Should, status frames are sent, form is state frame head+mode code+filling.
Preferably, the system uses 1553oE network bridge NB, realizes 1553oE network controller NC and 1553B buses RT
Bridge joint, realize the data communication between system and 1553B buses；
The 1553B buses RT has virtual MAC Address in systems, has in ethernet switched network unique
Property；
The 1553oE network bridges NB is used to implement the opposite of 1553oE network/MAC address and 1553B bus RT addresses and reflects
It penetrates；It is additionally operable to realize Relative Maps and 1553oE shapes between 1553oE command frames and 1553B bus line commands word and data word
Relative Maps between state frame and 1553B bus states word and data word.
(3) advantageous effect
The present invention proposes a kind of ethernet communication system based on 1553B agreements, and realizing has similar 1553B buses reality
The ethernet communication system of Shi Xing, certainty and industry ethernet high speed low cost, and the ethernet communication system compatible passes
The 1553B bus apparatus of system proposes a kind of network controller (NC) based on the service system and the network terminal (NT) is based on
The method that the ethernet communication method (1553oE) of 1553B agreements communicates.The present invention with 1553B certainty and in real time
Property, traditional 1553B equipment can be compatible with；But also with Ethernet high speed and low cost the features such as, bus data can be improved
Transmission rate can meet the development of modern aerospace bus system.
Description of the drawings
Fig. 1 is the 1553oE communication system block diagrams of the present invention；
Fig. 2 is data transmission format schematic diagram between NC-NT of the invention；
Fig. 3 is data transmission format schematic diagram between NC-RT of the invention.
Specific embodiment
To make the purpose of the present invention, content and advantage clearer, with reference to the accompanying drawings and examples, to the present invention's
Specific embodiment is described in further detail.
Embodiments of the Fig. 1 for a kind of ethernet communication system based on 1553B agreements of the present invention, the system embodiment
In, have and only there are one work network controller (NC), 4 network terminals (NT), by ethernet switched network realize NC,
The interconnection of NT, the network equipment are communicated using a kind of ethernet communication method (1553oE) based on 1553B agreements, this is based on
The ethernet communication method of 1553B agreements realizes that the 1553oE Ethernets are referred to as 1553oE using 1553oE Ethernets.Institute
1553oE is stated to be defined as：Meet seven layer network models of OSI, only increase in the data link layer of seven layer network models of OSI
1553oE controls sublayer, is used to implement the communication based on 1553B agreements；The frame structure of the 1553oE includes destination address, source
Address, type/length, 1553oE frame heads, upper layer protocol data and FCS verifications；The control of 1553oE and status display by
1553oE frame heads determine that 1553oE frame heads are different according to definition, represent order frame head, state frame head and data frame head respectively；
1553oE command frames, status frames and data frame carry out ethernet frame exchange, 1553oE command frames, shape by ethernet switched network
Source address is the MAC Address of sending device in state frame and data frame, and destination address is the MAC Address of receiving device；The ether
Net exchange network only carries out ethernet frame exchange according to the destination address of 1553oE command frames, status frames and data frame, exchanges to
Correctly receive the network equipment.
The network controller NC of the 1553oE passes for the data of each NT terminals in management and dispatching 1553oE systems
It is defeated, have in etching system when any and only there are one NC work.NC can send 1553oE command frames and data frame, Ke Yijie to NT
Receive 1553oE status frames and the data frame that NT is sent.NC has unique MAC Address in ethernet switched network.
The network terminal NT of the 1553oE, it is impossible to actively initiate data transmission, need to realize data by the management and dispatching of NC
Transmission.NT can receive the 1553oE command frames and data frame of NC transmissions, can send 1553oE status frames and data frame to NC.
NT has unique MAC Address in ethernet switched network.
1553oE command frames are used to implement the order of 1553 agreements, optional carrying data, when the length of 1553oE command frames
During less than Ethernet minimum frame length, frame length is supplied in filling；When the length of 1553oE command frames is more than Ethernet maximum frame length, tear open
Be divided into command frame and, one or more data frames；
1553oE status frames are used to implement the response of 1553 agreements, optional carrying data；When the length of 1553oE status frames
During less than Ethernet minimum frame length, frame length is supplied in filling；When the length of 1553oE status frames is more than Ethernet maximum frame length, tear open
Be divided into status frames and, one or more data frames；
1553oE data frames are not used alone, and command frame or status frames are followed, for data transmission；
1553oE is used to implement the data transmission of 1553B agreements, and the network controller NC of 1553oE is equivalent to 1553B buses
BC, the network terminal NT of 1553oE is equivalent to the RT of 1553B buses, the NC of 1553oE for sending command frame and data frame,
The NT of 1553oE is used to send status frames and data frame.
1553oE realizes that the NC that the data transfer mode of the RT of BC to the 1553B buses of 1553B buses is 1553oE is sent
Command frame carries data, optional transmission data frame；The NT of 1553oE carries out reception processing, is responded to the NC of 1553oE, hair
Status frames are sent, do not carry data；
1553oE realizes that the NC that the data transfer mode of the BC of RT to the 1553B buses of 1553B buses is 1553oE is sent
Command frame does not carry data, and the NT of 1553oE carries out reception processing, responded to the NC of 1553oE, sends status frames, carries
Data, optional transmission data frame；
1553oE realizes various mode codes of the 1553B for control, and during the transmission of 1553oE mode codes, mode code command frame
The value in the subaddressing domain of head is full 0 or complete 1；1553oE realizes the biography of the mode code of the RT of BC to the 1553B buses of 1553B buses
The NC that defeated mode is 1553oE sends command frame, and form is mode code order frame head+mode code+filling；The NT of 1553oE is carried out
Reception is handled, and is responded to the NC of 1553oE, sends status frames, and form is state frame head+filling；
1553oE realizes that the NC that the mode code transmission mode of the BC of RT to the 1553B buses of 1553B buses is 1553oE is sent out
Command frame is sent, form is mode code order frame head+filling；The NT of 1553oE carries out reception processing, is rung to the NC of 1553oE
Should, status frames are sent, form is state frame head+mode code+filling.
The 1553oE real-time performances NC communicates in the following way with the data of NT, as shown in Figure 2.
1) NC can send 1553oE command frames to NT.Command frame can carry data or follow data frame.Command frame and
The source address of data frame is the MAC Address of NC, and destination address is the MAC Address of NT.
2) ethernet switched network only carries out ethernet frame exchange according to the destination address of 1553oE command frames and data frame,
By the network port where command frame and data frames exchange to NT.
3) NT receives command frame and data frame, sends status frames to NC, can carry data or follow data frame.State
The source address of frame and data frame is the MAC Address of NT, and destination address is the MAC Address of NC.
4) ethernet switched network only carries out ethernet frame exchange according to the destination address of 1553oE status frames and data frame,
By the network port where status frames and data frames exchange to NC.
5) NC receives the status frames (and data frame) that NT is sent, and completes data communication.
In embodiment, system uses 1553oE network bridge NB, realizes 1553oE network controller NC and 1553B buses RT
Bridge joint, realize the data communication between 1553oE systems and 1553B buses.
The 1553B bus RT equipment has virtual MAC Address in systems, has in ethernet switched network
Uniqueness.
The 1553oE network bridge NB realize that 1553oE network/MAC address is opposite with 1553B bus RT addresses and reflect
It penetrates.
The 1553oE network bridge NB, realize 1553oE command frames and 1553B bus line commands word and data word and
Relative Maps between 1553oE status frames and 1553B bus states word and data word.
The 1553oE real-time performances NC communicates in the following way with the data of RT, as shown in Figure 3.
1) 1 RT equipment initiates command frame to NC thereto, and the source address of command frame is the MAC Address of NC, and destination address is
The virtual mac address of RT, is transmitted in ethernet networks.
2) ethernet switched network is only according to the destination address of command frame, network-side command frame being forwarded to where NB
Mouthful.
3) after NB receives command frame, agreement is mapped to the command word (can be with data word) of 1553B buses, total in 1553B
It is transmitted on line.
4) after NT receives command frame (can be with data word), according to 1553B bus protocols, sending responsive state word (can band
Data word).
5) NB receives status word (can be with data word), and agreement is mapped to the status frames of 1553oE networks, in ethernet networks
Transmission, the source address of status frames are the virtual mac address of RT, and destination address is the MAC Address of NC, is transmitted in ethernet networks.
6) ethernet switched network is only according to the destination address of status frames, network-side status frames being forwarded to where NC
Mouthful.
7) NC receives the status frames of RT transmissions, completes data communication.
The above is only the preferred embodiment of the present invention, it is noted that for the ordinary skill people of the art
For member, without departing from the technical principles of the invention, several improvement and deformation can also be made, these are improved and deformation
Also it should be regarded as protection scope of the present invention.
Claims (4)
1. a kind of data communications method of the NC realized using the ethernet communication system based on 1553B agreements and NT, feature
It is,
The system includes network controller NC and network terminal NT, and the interconnection of NC, NT, NC are realized by ethernet switched network
It is the network equipment with NT, is communicated between each network equipment using a kind of ethernet communication method based on 1553B agreements,
The ethernet communication method based on 1553B agreements realizes that the 1553oE Ethernets are referred to as using 1553oE Ethernets
1553oE, the 1553oE are defined as：Meet seven layer network models of OSI, only in the data link layer of seven layer network models of OSI
Increase 1553oE control sublayers, be used to implement the communication based on 1553B agreements；The frame structure of the 1553oE includes destination
Location, source address, type/length, 1553oE frame heads, upper layer protocol data and FCS verifications；The control of 1553oE and status display by
1553oE frame heads determine that 1553oE frame heads are different according to definition, represent order frame head, state frame head and data frame head respectively；
1553oE command frames, status frames and data frame carry out ethernet frame exchange, 1553oE command frames, shape by ethernet switched network
Source address is the MAC Address of sending device in state frame and data frame, and destination address is the MAC Address of receiving device；The ether
Net exchange network only carries out ethernet frame exchange according to the destination address of 1553oE command frames, status frames and data frame, exchanges to
Correctly receive the network equipment；
The network controller NC of the 1553oE, for the data transmission of NT terminals each in management scheduling system, any moment
Have in system and only there are one NC work, NC can send 1553oE command frames and data frame to NT, can receive NT transmissions
1553oE status frames and data frame, NC have unique MAC Address in ethernet switched network；
The network terminal NT of the 1553oE, it is impossible to data transmission is actively initiated, need to realize data transmission by the management and dispatching of NC,
NT can receive the 1553oE command frames and data frame of NC transmissions, and 1553oE status frames and data frame, NT tools can be sent to NC
There is unique MAC Address in ethernet switched network；
This method includes the following steps：
1) NC sends 1553oE command frames to NT, and command frame can carry data or follow data frame, command frame and sends to NT
The source address of data frame is the MAC Address of NC, and destination address is the MAC Address of NT；
2) ethernet switched network only carries out ethernet frame exchange according to the destination address of 1553oE command frames and data frame, will order
Enable the network port where frame and data frames exchange to NT；
3) NT receives command frame and data frame, sends status frames to NC, status frames can carry data or follow data frame, state
Frame and MAC Address of the source address for NT to the NC data frames sent, destination address is the MAC Address of NC；
4) ethernet switched network only carries out ethernet frame exchange according to the destination address of 1553oE status frames and data frame, by shape
The network port where state frame and data frames exchange to NC；
5) status frames or status frames and data frame that NC receptions NT is sent, complete data communication.
2. the method as described in claim 1, which is characterized in that
1553oE command frames are used to implement the order of 1553 agreements, optional carrying data, when the length of 1553oE command frames is less than
During Ethernet minimum frame length, frame length is supplied in filling；When the length of 1553oE command frames is more than Ethernet maximum frame length, split into
Command frame and, one or more data frames；
1553oE status frames are used to implement the response of 1553 agreements, optional carrying data；When the length of 1553oE status frames is less than
During Ethernet minimum frame length, frame length is supplied in filling；When the length of 1553oE status frames is more than Ethernet maximum frame length, split into
Status frames and, one or more data frames；
1553oE data frames are not used alone, and command frame or status frames are followed, for data transmission；
1553oE is used to implement the data transmission of 1553B agreements, and the network controller NC of 1553oE is equivalent to 1553B buses
The network terminal NT of BC, 1553oE are equivalent to the RT of 1553B buses, and the NC of 1553oE is used to send command frame and data frame,
The NT of 1553oE is used to send status frames and data frame.
3. the method as described in claim 1, which is characterized in that 1553oE realizes the RT of BC to the 1553B buses of 1553B buses
Data transfer mode be 1553oE NC send command frame, carry data, optional transmission data frame；The NT of 1553oE is connect
Receipts processing, is responded to the NC of 1553oE, is sent status frames, is not carried data；
1553oE realizes that the NC that the data transfer mode of the BC of RT to the 1553B buses of 1553B buses is 1553oE sends order
Frame does not carry data, and the NT of 1553oE carries out reception processing, responded to the NC of 1553oE, sends status frames, carries number
According to optional transmission data frame；
1553oE realizes various mode codes of the 1553B for control, and during the transmission of 1553oE mode codes, mode code order frame head
The value in subaddressing domain is full 0 or complete 1；1553oE realizes the transmission side of the mode code of the RT of BC to the 1553B buses of 1553B buses
The NC that formula is 1553oE sends command frame, and form is mode code order frame head+mode code+filling；The NT of 1553oE is received
Processing, is responded to the NC of 1553oE, sends status frames, and form is state frame head+filling；
1553oE realizes that the NC that the mode code transmission mode of the BC of RT to the 1553B buses of 1553B buses is 1553oE sends life
Frame is enabled, form is mode code order frame head+filling；The NT of 1553oE carries out reception processing, is responded to the NC of 1553oE, hair
Status frames are sent, form is state frame head+mode code+filling.
4. the method as described in claim 1, which is characterized in that the system uses 1553oE network bridge NB, realizes 1553oE
The bridge joint of network controller NC and 1553B bus RT realizes the data communication between system and 1553B buses；
The 1553B buses RT has virtual MAC Address in systems, has uniqueness in ethernet switched network；
The 1553oE network bridges NB is used to implement the Relative Maps of 1553oE network/MAC address and 1553B bus RT addresses；
It is additionally operable to realize Relative Maps and 1553oE states between 1553oE command frames and 1553B bus line commands word and data word
Relative Maps between frame and 1553B bus states word and data word.
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