CN107528635A - Communicator and method based on SFP optical modules - Google Patents
Communicator and method based on SFP optical modules Download PDFInfo
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- CN107528635A CN107528635A CN201710705962.0A CN201710705962A CN107528635A CN 107528635 A CN107528635 A CN 107528635A CN 201710705962 A CN201710705962 A CN 201710705962A CN 107528635 A CN107528635 A CN 107528635A
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- 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
- H04B10/40—Transceivers
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- 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
- H04B10/2589—Bidirectional transmission
- H04B10/25891—Transmission components
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Abstract
The invention belongs to the technical field of communication, there is provided one kind in the case where one-way safety transmits data, can realize the technical scheme of high speed data transfer, and the technical scheme includes communicator and method based on SFP optical modules；Described device includes：Programmable logic device, is provided with parallel data grabbing card, and can be by the data conversion received into the data for meeting predetermined format；String and data conversion chip, are connected, and can realize the mutual conversion between serial data and parallel data with the programmable logic device by parallel bus；SFP optical modules, it is connected with the string and data conversion chip by serial data line, and the SFP optical modules use the one-way communication mode without bi-directional verification in data transmission procedure.
Description
Technical field
The present invention relates to the technical field of communication, more particularly to a kind of communicator based on SFP optical modules, system and side
Method, more particularly, to a kind of nuclear safety that is applied to by the communicator and method based on SFP optical modules in level communication.
Background technology
It is security consideration in the higher communications field of security-level requirements, such as in the communication of nuclear power station, ensures security-critical
The information security of equipment, often require that communication communicates for one direction, if can accomplish that data can only be from peace on physical link
Sent on full visual plant, can be simpler and reliable in the exploited in communication of safety.
One-way transmission solution employs the signal transfer protocol with electrical connection mostly in the prior art, such as
(full name is " electrical characteristic of balanced voltage digital interface circuit " to RS-422, and it defines the characteristic of interface circuit.)；But send out
A person of good sense has found that this kind of solution has problems with during the present invention is realized：1st, opposed optical fibers transmit, its transmission distance
From shorter；2nd, transmission rate is not high, typically all within 10M；3rd, due to the connection using electric signal, electrical separation is not
It is good.
In order to solve the above-mentioned technical problem, it will usually transmitted using optical fiber, because optical fiber transmission has anti-interference good, electric
Air bound from, long transmission distance, high speed, easily connect up the features such as；Such as pass through SFP (English full name Small Form-factor
Pluggable, also referred to as SFP GBIC (Gigabit Interface Converter abbreviation)) optical module light number
It is widely used according to transmission.
But invention also found that SFP optical modules of the prior art are in actual applications during the present invention is realized
There is also many problems, such as：For two communication nodes for the point-to-point SFP for following 802.3 standards, mainly pass through Ethernet
PHY (English full name Physical Layer, physical layer) chip realizes that communicating pair diagnoses all the time to receiving-transmitting chain, i.e.,
It only can just carry out data transmission after both sides judge that each transmitting-receiving link is normal, that is, " LINK (connection) " process be present, and
And there is a certain degree of uncertainty in the time of this " LINK " process.
The content of the invention
In order to solve in communication technology scheme higher to safety requirements in the prior art, it is impossible to while take into account stable realization
One-way communication and the high technical problem of communication speed；The present invention provides a kind of communicator and method based on SFP optical modules, leads to
The technical scheme with reference to programmable logic device and SFP optical modules is crossed, realizes that high-speed secure communicates.
To achieve these goals, technical scheme provided by the invention includes：
On the one hand, there is provided a kind of communicator based on SFP optical modules, it is characterised in that including：
Programmable logic device, parallel data grabbing card is provided with, and can be predetermined into meeting by the data conversion received
The data of form；
String and data conversion chip, are connected with the programmable logic device by parallel bus, and can be realized serial
Mutual conversion between data and parallel data；
SFP optical modules, it is connected with the string and data conversion chip by serial data line, and the SFP optical modules
The one-way communication mode without bi-directional verification is used in data transmission procedure.
Preferably, the SFP optical modules use the list without bi-directional verification to the embodiment of the present invention in data transmission procedure
It is that only a data link is connected with the string and data conversion chip in the SFP optical modules to communication pattern.
The embodiment of the present invention is it is further preferred that only have a data link and the string and number in the SFP optical modules
Connected according to conversion chip, that is, remove the transmission data wire of the SFP optical modules or receive data wire, retain the SFP optical modes
The reception data wire of block sends data wire.
Preferably, simultaneously data conversion chip can pass through the change adjustment institute of its reference clock to the string to the embodiment of the present invention
State string and between data conversion chip and the SFP optical modules data transmission rate.
The embodiment of the present invention preferably, it is described string and data conversion chip be connected with the programmable logic device it is parallel always
Line is the parallel bus of TBI types.
Preferably, the SFP optical modules are arranged to serial electric signal to be converted to optic communication signal to the embodiment of the present invention.
Preferably, the programmable logic device is provided with can receive other data processors transmission number to the embodiment of the present invention
According to parallel data receiving port.
Preferably, the programmable logic device and/or other data processors can use self-defined the embodiment of the present invention
Secure communication protocols by data processing send to it is described string and data conversion chip.
On the other hand, the present invention also provides a kind of communication means based on SFP optical modules, it is characterised in that including：
Programmable logic device sends data to string and data conversion chip by parallel bus；
Simultaneously the parallel data of reception is converted to serial data to the string by data conversion chip；
The data conversion chip by the serial data after the conversion by the one-way communication mode without bi-directional verification,
The serial data is sent to the SFP optical modules.
Preferably, simultaneously data conversion chip sends the serial data after the conversion to institute to the string to the embodiment of the present invention
Before stating SFP optical modules, additionally it is possible to which the change for passing through its reference clock adjusts the string and data conversion chip and the SFP light
The transmission rate of data between module.
Preferably, the SFP optical modules use the list without bi-directional verification to the embodiment of the present invention in data transmission procedure
It is that only a data link is connected with the string and data conversion chip in the SFP optical modules to communication pattern.
The embodiment of the present invention is it is further preferred that only have a data link and the string and number in the SFP optical modules
The mode connected according to conversion chip is to remove the transmission data wire of the SFP optical modules, retains the reception number of the SFP optical modules
According to line.Or a data link is the reception data wire for removing the SFP optical modules, retain the SFP optical modules
Send data wire.
Preferably, the programmable logic device is provided with can receive other data processors transmission number to the embodiment of the present invention
According to parallel data receiving port；And the programmable logic device and/or other data processors can use customized
Secure communication protocols send data processing to the string and data conversion chip.
Preferably, methods described also includes the embodiment of the present invention：
Simultaneously data conversion chip by the one-way communication mode without bi-directional verification, receives the SFP optical modules to the string
Data；
Simultaneously data conversion chip is converted to parallel data to the string to the serial data of reception；
The programmable logic device receives the parallel data after the string and the conversion of data conversion chip by parallel bus.
Using above-mentioned technical proposal provided by the invention, one kind in following beneficial effect can be at least obtained：
1st, the achievable physically unidirectional data communication based on the communication of SFP optical modules, the high speed of SFP optic communications can be retained
Communication, while meet the security of single line of data transmission, high efficiency.
2nd, adjusted, realized to string and data conversion chip and institute by the change to string and data conversion chip reference clock
State the adjustment of the transmission rate of data between SFP optical modules so that realize that speed can adjust based on the communication of SFP optical modules.
3rd, the physical layer and link layer communication protocols of own safe level can be achieved based on the communication of SFP optical modules, pacify in core
During full level communication, increase extra Safety assurance measures without additionally needing, such data communication protocol will not be excessively complicated.
4th, when the transmission data wire for removing SFP optical modules, when retaining the reception data wire of SFP optical modules, wiring is reduced
Quantity.
The further feature and advantage of invention will illustrate in the following description, also, partly become aobvious from specification
And be clear to, or understood by implementing technical scheme.The purpose of the present invention and other advantages can be by illustrating
Specifically noted structure and/or flow are realized and obtained in book, claims and accompanying drawing.
Brief description of the drawings
Fig. 1 is a kind of schematic block diagram of the communicator based on SFP optical modules provided in an embodiment of the present invention；
Fig. 2 is a kind of flow chart of the communication means based on SFP optical modules provided in an embodiment of the present invention.
Embodiment
Embodiments of the present invention are described in detail below with reference to drawings and Examples, and how the present invention is applied whereby
Technological means solves technical problem, and the implementation process for reaching technique effect can fully understand and implement according to this.Need to illustrate
, these specific descriptions are to allow those of ordinary skill in the art to be more prone to, clearly understand the present invention, rather than to this hair
Bright limited explanation；And if conflict is not formed, each embodiment in the present invention and each spy in each embodiment
Sign can be combined with each other, and the technical scheme formed is within protection scope of the present invention.
In addition, can be in the control system of a such as group controller executable instruction the flow of accompanying drawing illustrates the step of
Middle execution, although also, show logical order in flow charts, in some cases, can be with different from herein
Order performs shown or described step.
Below by the drawings and specific embodiments, technical scheme is described in detail：
Embodiment
As shown in figure 1, the present embodiment a kind of communicator based on SFP optical modules of offer, the communicator include：
Programmable logic device 110, parallel data grabbing card is provided with, and can be predetermined into symbol by the data conversion received
The data of form；Wherein, the data of predetermined format can be user own data format (user as needed exploitation design
The data format come), or can also be the data format for meeting preassigned；
Programmable logic device 110 can be but not limited to FPGA, and (English full name is Field-Programmable Gate
Array, i.e. field programmable gate array) or CPLD (English full name is Complex Programmable Logic
Device, i.e. CPLD), transceiving data gigabit Ethernet is provided with the programmable logic device 110
FPDP, such as TBI (English full name is Ten-Bit interface, i.e. 10 interfaces) FPDP, it is so programmable to patrol
A kind of parallel data grabbing card TBI FPDPs transmitting-receiving TLK1211RCP (classes of Ethernet data transceiver can be used by collecting device 110
Type) data, and data collector can be integrated in inside programmable logic device 110, can also be arranged to lead to
Data-interface is crossed, is received from outside individually data collector；
String and data conversion chip 120, are connected, and can realize serial number with programmable logic device by parallel bus
According to the mutual conversion between parallel data；That is the FPDP of the string and data conversion chip 120 programmable logic device 110
Parallel data be converted to serial data (English is Serializer), and serial data of its reception is converted to parallel data
(English is Deserializer), is then sent to programmable logic device 110 by the parallel interface in it；
SFP (English full name Small Form-factor Pluggable, also referred to as SFP GBIC (Gigabit
Interface Converter abbreviation)) optical module 130, it is connected with string and data conversion chip 120 by serial data line,
And SFP optical modules use the one-way communication mode without bi-directional verification in data transmission procedure；List without bi-directional verification
Being to communication pattern need not be as prior art using two-way between SFP optical modules 130 and string and data conversion chip 120
" LINK " process, but data directly can be transmitted from a direction the opposing party by serial data line.
Preferably, SFP optical modules 130 use the one-way communication without bi-directional verification to the present embodiment in data transmission procedure
Pattern is that only a data link is connected with string and data conversion chip 120 in SFP optical modules.
It is connected it is further preferred that only having a data link in SFP optical modules 130 with string and data conversion chip 120
Mode be to remove the transmission data wire of SFP optical modules 130 or send FPDP, retain the reception number of SFP optical modules 130
According to line or receive FPDP；Only just realized by the reception data wire or reception FPDP of SFP optical modules 130
Go here and there and data conversion chip 120 is to the unidirectional data transmission of SFP optical modules 130 and/or SFP optical modules 130 to string and data conversion
The unidirectional data transmission of chip 120.
Certainly it can also be arranged to, when simultaneously data conversion chip 120 is to SFP 130 unidirectional data transmissions of optical module for string, make
With string and data conversion chip 120 to receive data wire or receive FPDP, now SFP optical modules 130 transmission data
Link corresponding to line or data sending terminal mouth is off；And work as SFP optical modules 130 to string and data conversion chip
During 120 unidirectional data transmission, using the transmission data wire or data sending terminal mouth of SFP optical modules 130, and SFP light now
Link corresponding to the reception data wire or reception FPDP of module 130 is off.
The present embodiment preferably, is gone here and there and data conversion chip 120 can be gone here and there by the change adjustment of its reference clock and number
According to the transmission rate of data between conversion chip 120 and SFP optical modules 130.Specifically, counted in string and data conversion chip 120
It is variable according to transmission rate, adjustable from 600Mbps to 1.3Gbps, its message transmission rate is dependent on its reference clock (English
Full name reference clock, abbreviation REFCLK), corresponding to the transmission rate of data, REFCLK is from 60MHz to 130MHz；It is low
In with higher than this reference clock frequency, go here and there and data conversion chip 120 is all not normally functioning.
Therefore, adjusted, realized to string and data conversion chip by the change to string and data conversion chip reference clock
The adjustment of the transmission rate of data between SFP optical modules so that realize that speed can adjust based on the communication of SFP optical modules.
The present embodiment preferably, is gone here and there and data conversion chip 120 is with the parallel bus that programmable logic device 110 is connected
The parallel bus of TBI (English full name is Ten-Bit interface, i.e. 10 interfaces) type.
Preferably, SFP optical modules 130 are arranged to as the general optic communication based on Ethernet the present embodiment, string
Capable electric signal is converted to optic communication signal.
Preferably, programmable logic device 110 is provided with can receive other data processors transmission number to the embodiment of the present invention
According to parallel data receiving port；It is further preferred that programmable logic device 120 and/or other data processors (such as CPU
The processor of type) customized secure communication protocols can be used to send data processing to string and data conversion chip.
Specifically, when the programmable logic device 110 that the present embodiment provides is as data processing centre, can set thereon
There are TBI data-interfaces, such programmable logic device 110 just has data-transformation facility, realizes the data transfer association of TBI interfaces
View；And data processing function, the data received are handled according to design requirement, and the data that needs are transmitted are sent
To TBI interfaces.When interface unit of the programmable logic device 110 as data processing that the present embodiment provides, FPGA
Device 110 just realizes TBI data-interface transfer functions, realizes the Data Transport Protocol of TBI interfaces；It is and single with external data processing
Member carries out data-interface transfer function, and external data processing unit can be CPU or other data processing units.And
And customized safe data communication protocol can be used in CPU or programmable logic device (FPGA/CPLD) 110, when
When control applied to nuclear power station administration, it is possible to the data communication protocol of self-defining character synkaryon safety requirements, so can be with
Realize the physical layer and link layer communication protocols of own nuclear safe level.
As shown in Fig. 2 the present embodiment also provides a kind of communication means based on SFP optical modules, this method includes：
S110, programmable logic device send data to string and data conversion chip by parallel bus；FPGA
Device, which is provided with, can receive the parallel data receiving port that other data processors send data；And programmable logic device and/
Or other data processors can use customized secure communication protocols to send data processing to string and data conversion chip.
The parallel data of reception is converted to serial data by S120, string and data conversion chip；
S130, string and data conversion chip send the serial data after conversion to before SFP optical modules, additionally it is possible to pass through
Its reference clock change adjustment string and between data conversion chip and SFP optical modules data transmission rate；
S140, data conversion chip by the one-way communication mode without bi-directional verification, incite somebody to action the serial data after conversion
Serial data is sent to SFP optical modules.SFP optical modules use the one-way communication mould without bi-directional verification in data transmission procedure
Formula is that only a data link is connected with string and data conversion chip in SFP optical modules.It is further preferred that SFP optical modules
In only a data link with string and the mode that is connected of data conversion chip be to remove the transmission data wire of SFP optical modules, guarantor
Stay the reception data wire of SFP optical modules.When data are transmitted to SFP optical modules 130 from programmable logic device 110, pass through SFP light
The destination of module transfer data, such as the field control station of parameter to be received.
Preferably, the above method also includes the embodiment of the present invention：
Go here and there and data conversion chip is by the one-way communication mode without bi-directional verification, receive the data of SFP optical modules, and
Transmit to programmable logic device 110；When data are transmitted to programmable logic device 110 from SFP, data source location, for example (,) it is existing
Field control station.
Go here and there and data conversion chip is converted to parallel data to the serial data of reception；
Programmable logic device receives the parallel data after string and the conversion of data conversion chip by parallel bus.
Using above-mentioned technical proposal provided by the invention, one kind in following beneficial effect can be at least obtained：
1st, the achievable physically unidirectional data communication based on the communication of SFP optical modules, the high speed of SFP optic communications can be retained
Communication, while meet the security of single line of data transmission, high efficiency.
2nd, by string and data conversion chip reference clock change adjust, realize to string and data conversion chip with
The adjustment of the transmission rate of data between SFP optical modules so that realize that speed can adjust based on the communication of SFP optical modules.
3rd, the physical layer and link layer communication protocols of own safe level can be achieved based on the communication of SFP optical modules, pacify in core
During full level communication, increase extra Safety assurance measures without additionally needing, such data communication protocol will not be excessively complicated.
4th, when the transmission data wire or reception data wire that remove SFP optical modules, the reception data wire of reservation SFP optical modules
Or when sending data wire, reduce wiring quantity.
One of ordinary skill in the art will appreciate that：Realizing all or part of step of above-mentioned each method embodiment can lead to
The related hardware of programmed instruction is crossed to complete.Foregoing program can be stored in a computer read/write memory medium.The journey
Sequence upon execution, execution the step of including above-mentioned each method embodiment；And foregoing storage medium includes：ROM, RAM, magnetic disc or
Person's CD etc. is various can be with the medium of store program codes.
Finally it should be noted that described above is only highly preferred embodiment of the present invention, not the present invention is appointed
What formal limitation.Any those skilled in the art, it is without departing from the scope of the present invention, all available
The way and technology contents of the disclosure above make many possible variations and simple replacement etc. to technical solution of the present invention, these
Belong to the scope of technical solution of the present invention protection.
Claims (10)
- A kind of 1. communicator based on SFP optical modules, it is characterised in that including：Programmable logic device, is provided with parallel data grabbing card, and can be by the data conversion received into meeting predetermined format Data；String and data conversion chip, for the mutual conversion between serial data and parallel data；The string and data conversion core Piece is connected with the programmable logic device by parallel bus, and the programmable logic device uses customized secure communication protocols Data processing is sent to the string and data conversion chip；SFP optical modules, it is connected with the string and data conversion chip by serial data line, and in the SFP optical modules only There is a data link to be connected with the string and data conversion chip；It is described string and data conversion chip by reference to clock change Change the transmission rate of data between adjustment and the SFP optical modules.
- 2. device according to claim 1, it is characterised in that only have a data link and institute in the SFP optical modules The mode for stating string and the connection of data conversion chip is to remove the transmission data wire of the SFP optical modules or receive data wire, is protected Stay the reception data wire of the SFP optical modules or send data wire.
- 3. device according to claim 1, it is characterised in that the string and data conversion chip and the FPGA The parallel bus of device connection is the parallel bus of TBI types.
- 4. device according to claim 1, it is characterised in that the SFP optical modules are arranged to serial electric signal to turn It is changed to optic communication signal.
- 5. device according to claim 1, it is characterised in that the programmable logic device, which is provided with, can receive other numbers The parallel data receiving port of data is sent according to processor.
- A kind of 6. communication means based on SFP optical modules, it is characterised in that including：Programmable logic device uses customized secure communication protocols, and string and data conversion are sent data to by parallel bus Chip；Simultaneously the parallel data of reception is converted to serial data to the string by data conversion chip；Simultaneously data conversion chip adjusts the string simultaneously data conversion chip and the SFP light to the string by reference to the change of clock The transmission rate of data between module；The string and data conversion chip is by the serial data after the conversion, passes through the SFP optical modules and the string and number According to the data link of conversion chip, the serial data is sent to the SFP optical modules.
- 7. according to the method for claim 6, it is characterised in that the SFP optical modules and the string and data conversion chip Between only a data link connection.
- 8. according to the method for claim 7, it is characterised in that a data link is to remove the SFP optical modules Transmission data wire, retain the reception data wires of the SFP optical modules.
- 9. according to the method for claim 7, it is characterised in that a data link is to remove the SFP optical modules Reception data wire, retain the transmission data wires of the SFP optical modules.
- 10. according to the method for claim 6, it is characterised in that methods described also includes：The string and data conversion chip is by the one-way communication mode without bi-directional verification, receives the number of the SFP optical modules According to；Simultaneously data conversion chip is converted to parallel data to the string to the serial data of reception；The programmable logic device receives the parallel data after the string and the conversion of data conversion chip by parallel bus.
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