CN106603366A - High-reliability redundant field bus system, and data processing method and apparatus - Google Patents
High-reliability redundant field bus system, and data processing method and apparatus Download PDFInfo
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- CN106603366A CN106603366A CN201710084990.5A CN201710084990A CN106603366A CN 106603366 A CN106603366 A CN 106603366A CN 201710084990 A CN201710084990 A CN 201710084990A CN 106603366 A CN106603366 A CN 106603366A
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- 230000005540 biological transmission Effects 0.000 claims abstract description 18
- 238000012545 processing Methods 0.000 claims description 24
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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
- H04L12/40169—Flexible bus arrangements
- H04L12/40176—Flexible bus arrangements involving redundancy
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L45/00—Routing or path finding of packets in data switching networks
- H04L45/24—Multipath
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Abstract
The invention discloses a high-reliability redundant network system, and a data processing method and apparatus. The system comprises a first communication device, a second communication device, and two or more independent redundant links located between the two communication devices. The system is characterized in that communication nodes located on different independent redundant links are interconnected so that more transmission paths are provided for data messages in the process of transmitting the data messages from the first communication device to the second communication device. According to the high-reliability redundant network system, the mode of mutual independence and isolation of redundant channels of a conventional redundant network is broken through, and the reliability and the fault tolerance are higher compared with the conventional redundant network.
Description
Technical field
The present invention relates to communication technical field, and in particular to a kind of high reliability redundant network system and data processing side
Method, device.
Background technology
Pursuit of the mankind to data transmission credibility is endless, and especially in aerospace field, people attempt each
The technology for planting various kinds is used for ensureing the reliability of data transfer.Improve the most simply conventional method of data transmission credibility to be just to increase
Extra data channel, as shown in figure 1, improving terminal 1 by the dual redundant passage design of remaining subregion A and remaining subregion B
The reliability of data transfer between terminal 2.If dual redundant passage is still inadequate, general way is to continue with increasing independent
Redundant channel, however, increase extra data channel to mean to increase a set of extra connection equipment and circuit, so
Hardware cost can be greatly improved, and also results in the series of problems in design.How increase hardware device as few as possible
The reliability of data transfer can be improved again, to be applied to the networking scene higher to data transmission credibility requirement, especially navigated
The bus system of empty space flight association area, is the technical problem to be solved.
The content of the invention
In view of above-mentioned the deficiencies in the prior art, the present invention proposes a kind of high reliability redundant network system and data processing
Method, device.
According to an aspect of the invention, there is provided a kind of high reliability on site redundant bus system, the system includes the
One communication equipment, the second communication equipment and the two or more pieces independent redundancy link between described two communication equipments, its
It is characterised by, by the communication node interconnection being located at respectively on different independent redundancy links, so that data message is logical from first
Letter device transmission is to having more transmission paths during the second communication equipment.
The communication node or the second communication equipment also include redundant message processing module, for rejecting by different paths
The message of repeated reaching.
The redundant message processing module is specifically included：Data message logging modle, reaching for record data message should
Time and data message ID during communication node；Data message processing module, for setting in the communication node or the second communication
For when receiving a data message, the ID of the data message is compared one by one with all records of data message logging modle
Compared with if there is the data message receiving record with identical ID, and it receives the time also not less than aging threshold, then directly return
Return or send the corresponding response of the identical recordings message；If there is no the data message receiving record with identical ID, or
Although person there is the data message receiving record with identical ID but it receives the time more than aging threshold, then the datagram
The ID and current timestamp information of text gives data message logging modle and is recorded, and then processes the data message.
According to another aspect of the present invention, a kind of redundant network data processing method is additionally provided, it is characterised in that when
When communication node receives a data message, all messages preserved on the ID of the data message and communication node are received into note
Record is compared one by one, and if there is the data message receiving record with identical ID, and it receives the time also not less than aging
Threshold value, then directly return or send the corresponding response of the identical recordings message；
If there is no the data message receiving record with identical ID, although or existing and being connect with the data message of identical ID
Receive record but it receives the time more than aging threshold, then the ID and current timestamp information of the data message are preserved, so
Post-process the data message.
According to another aspect of the present invention, additionally provide a kind of data processing equipment to complete above-mentioned data processing side
Method, the data processing equipment may be located at the receiving device of the communication node on redundant link or data message.The data
Processing meanss are specifically included：
Data message logging modle, the time and data message ID when reaching the communication equipment for record data message；
Data message processing module, for when the communication equipment receives a data message, by the data message
ID is compared one by one with all records of data message logging modle, and if there is the data message with identical ID note is received
Record, and it receives the time also not less than aging threshold, then directly return or send the corresponding response of the identical recordings message；
If there is no the data message receiving record with identical ID, although or existing and being connect with the data message of identical ID
Receive record but it receives the time more than aging threshold, then give data the ID and current timestamp information of the data message
Message accounting module is recorded, and then processes the data message.
Compared with prior art, the present invention has broken the structure that each remaining subregion of traditional redundant network is mutually isolated, by original
This independent each redundant link is interconnected so that data can carry out packet transmission by more mulitpath, carry significantly
The reliability of high data transfer reduces as far as possible hardware device again.Simultaneously in order to the forwarding solved due to switch may cause mesh
Mark network node receives many parts of same packets, by processing the transmitting message that each communication node of network is received, can
Realization is filtered to duplicate data, so as to only retain the advantage of redundant network proposed by the invention, its shortcoming can be removed again, is made
It meets the final demand of user.
Description of the drawings
Fig. 1 illustrates the transmission structure schematic diagram of traditional redundant network.
Fig. 2 illustrates the transmission structure schematic diagram of high reliability redundant network of the invention.
Fig. 3 illustrates traditional redundant network data transfer path 1.
Fig. 4 illustrates traditional redundant network data transfer path 2.
Fig. 5 illustrates the data transfer path 3 that the redundant network of the present invention increases.
Fig. 6 illustrates the data transfer path 4 that the redundant network of the present invention increases.
Fig. 7 illustrates the Redundancy Management flow chart of communication node.
Fig. 8 illustrates communication node link layer data process chart.
Fig. 9 illustrates communication node transport layer data process chart.
Specific embodiment
The present invention is described in further detail below in conjunction with the accompanying drawings.
With reference to the transmission structure schematic diagram and Fig. 2 of traditional redundant network of Fig. 1 high reliability redundant network of the invention
Transmission structure schematic diagram can be seen that the present invention and increase only for remaining subregion A, B on hardware device for traditional redundant network
Data interconnection equipment is added, it is minimum that hardware increases cost.But the data transfer path of traditional redundant network is only such as Fig. 3 and Tu
Two paths shown in 4, the redundant network after the present invention is improved can then increase the extra message transmissions paths of Fig. 5 Fig. 6 two,
Obviously the increase in path substantially increases the reliability of data transfer, while and not increasing too many hardware device.
In the redundant network of the present invention, while opening 4 transmission paths shown in Fig. 3-Fig. 6, whole network is real-time
Reconstruct, namely any time, as long as any one paths therein are normal, data transfer can success.With traditional redundant network
Network is compared, and when there are two Single Point of Faliures, network self-healing rate can lift 1 times.It should be noted that Fig. 1-Fig. 6 is only to show
Meaning property, the remaining subregion of traditional redundant network can also be two or more, as long as by the communication node in different remaining subregions
Between network is formed by interconnection can form the redundant network with more transmission paths of the invention.
In the case of all of transmission path standard-sized sheet, due to the presence of many transmission paths, a message may pass through
Same communication node is arrived in different paths；Due to error detection retransmission process, message is likely to be arrived in different time same
Individual equipment.The present invention enables partial parameters of all devices in network by contrast message, rejects the message of repeated reaching, this
Individual process is referred to as redundancy management.
The core of redundancy management of the present invention is：
1) in a switch, a message is only processed once；
2) on a node card, to a piece of news real response once；
3) on a communication node, to a piece of news only to host report once.
In order to realize Redundancy Management, first have to set up the unique identification of message, to confirm never with path or difference
Whether the message that the time reaches is same message, and this is strictly related to message format.The unique mark of message is referred to as UPID
（Unique Packet Indicator）.UPID message field (MFLD)s shown in following table are constituted, before it there is coiling in command sequence number,
Protocol specification should ensure that the uniqueness of UPID：
The UPID of table 1 is constituted
| Field name | Referred to as | Explanation | Explain |
| Command Seq | CSEQ | Command sequence number | Command sequence number, from the beginning of 1, each equipment often sends an order then+1 |
| Retry | Retransmission sequence number | Once+1 is often retransmitted, is at most retransmitted 3 times | |
| Source RT | SRT | Source node address | It is message source, rather than order source address |
| Response Indicator | RI | Response identification | 1 represents that this is in response to message |
| Command | CMD | Order | |
| Frame Index | FIDX | Frame index | Many frame index inside an order |
In order to realize the purpose that duplicate message is filtered, need all to carry out redundancy pipe to communication nodes such as network node and switches
Reason.The Redundancy Management of communication node includes 2 layers of process, and ground floor is link layer Redundancy Management, and the second layer is transport layer management, such as
Shown in Fig. 7.
It is specific as follows as Fig. 8 shows communication node link layer data process chart：
Step 1：256 grades of fifo queues of an overall situation are initially set up, word width 128bits is recorded, total length is 4K bytes；Often
One record is included：Timestamp（64bits）+ UPID（48bits）+ retain（16bits）；
Step 2：When a heading is received, first a note is formed with " Timestamp ' 64b+UPID ' 48b+0 ' 16b "
Record, is then one by one compared this record with all record RecX in fifo queue.If the note in fifo queue
Record alreadys exceed 5.2ms（For 1GE networks）, then show that this records weathered, skip over this record.If in fifo queue
Record also within life cycle, and the UPID of the record is identical with the UPID of the message for newly receiving, then shown this message
It is processed, return, do not reprocess the message.If all records within life cycle all do not have and the message for receiving
UPID is identical, shows that this is a newly arrived message, the record " Timestamp ' 64b+UPID ' 48b+ of this new message
0 ' 16b " is pressed into fifo queue, then processes this message.
In initialization, the full memory space of fifo queue is reset.In addition, receiving directly returning or processing
Before the message for arriving, the corresponding MIB counters in this port are also updated, one is redundant message counter, and one is effective
Packet accouter.
In transport layer, then the re-transmission in link layer is carried out further Redundancy Management, to the multiple order for retransmitting,
Do single treatment.In other words, the Redundancy Management of transport layer, can be regarded as retransmission management.So communication node is in transport layer
It is not the judgement that duplicate message is carried out using UPID, but by UMID（Unique Message Indicator, message is only
One mark）To carry out the judgement of duplicate message.UMID compositions are as shown in the table：
The UMID of table 2 is constituted
| Field name | Referred to as | Explanation | Explain |
| Command Seq | CSEQ | Command sequence number | Command sequence number, from the beginning of 1, each equipment often sends an order then+1 |
| Source RT | SRT | Source node address | It is message source, rather than order source address |
| Response Indicator | RI | Response identification | 1 represents that this is in response to message |
| Command | CMD | Order | |
| Frame Index | FIDX | Frame index | Many frame index inside an order |
The data processing of transport layer stores history message information also with 256 grades of FIFO, and specific handling process is such as
Shown in Fig. 9：
Step 1：256 grades of fifo queues of an overall situation are initially set up, word width 128bits is recorded, total length is 4K bytes；Often
One record is included：Timestamp（64bits）+ UPID（30bits）+ retain（34bits）；
Step 2：When a complete message is received, one is formed with " Timestamp ' 64b+UMID ' 30b+0 ' 34b " first
Record, is then one by one compared this record with all record RecX in fifo queue.If in fifo queue
Record alreadys exceed 5.2ms（For 1GE networks）, then show that this records weathered, skip over this record.If fifo queue
In record also within life cycle, and the UMID of the record is identical with the UMID of the message for newly receiving, then shown this message
It is processed to cross, return, send former response.If all records within life cycle all do not have and the message for receiving
UMID is identical, shows that this is a newly arrived message, the record " Timestamp ' 64b+UMID ' 30b+ of this new message
0 ' 16b " is pressed into fifo queue, then processes this message, response message is stored in after queue and sends the response message.
Above-mentioned transport layer is embodied in 2 aspects with link layer to the process main difference of data message：
1) component of record is different；
2) it is judged as redundant message（Retransmit message）Processing method afterwards is different.After being judged as redundant message, be in history
The corresponding responses of UMID are searched in response queue, if response is present, and this response message is also without aging, then this
Response message is retransmited one time, the Retry of this response message is modified as during transmission it is consistent with source messages, so as to be shown to be
Response to this message for retransmitting.
It should be noted that when response is retransmitted, it is also possible to retransmit one group of Frame, and not exclusively one.
Due to the presence of following two situations, it would be desirable to carry out burin-in process to message, reason is as follows：
The first situation, the test serial number SEQ counter heights of each node are 14bits, then sending 16384 messages
Afterwards, ensuing test serial number and UMID will be used in history.Though FIFO caching depth only has
256, but if catching up with limiting case, the message of longer period of time by chance all lost in way, it is likely that different reports occur
The sequence number and UMID of text are identical to cause Message processing mistake；
Second situation, certain node have sent and just restarted after several messages, and SEQ restarts.If at this moment
Offered load is very light, and the new SEQ for producing is entirely possible to be also present in FIFO, so as to cause to judge failure.So, it is old in time
Change what message was still quite necessary.
It should be noted that aforementioned embodiments not only can be completed on communication node, on some redundant paths
Communication node do not possess disposal ability or communication node it is very few even without when, it is also possible to complete above-mentioned redundancy report in receiving terminal
The data processing of text, it is final to cause target network node only to process a same packet.
Those skilled in the art are it should be appreciated that embodiments of the invention can be provided as method, system or computer program
Product.Therefore, the present invention can be using complete hardware embodiment, complete software embodiment or with reference to the reality in terms of software and hardware
Apply the form of example.And, the present invention can be adopted and wherein include the computer of computer usable program code at one or more
The shape of the computer program implemented in usable storage medium (including but not limited to magnetic disc store and optical memory etc.)
Formula.
The present invention is the flow process with reference to method according to embodiments of the present invention, equipment (system) and computer program
Figure and/or block diagram are describing.It should be understood that can be by computer program instructions flowchart and/or each stream in block diagram
The combination of journey and/or square frame and flow chart and/or the flow process in block diagram and/or square frame.These computer programs can be provided
The processor of all-purpose computer, special-purpose computer, Embedded Processor or other programmable data processing devices is instructed to produce
A raw machine so that produced for reality by the instruction of computer or the computing device of other programmable data processing devices
The device of the function of specifying in present one flow process of flow chart or one square frame of multiple flow processs and/or block diagram or multiple square frames.
These computer program instructions may be alternatively stored in can guide computer or other programmable data processing devices with spy
In determining the computer-readable memory that mode works so that the instruction being stored in the computer-readable memory is produced to be included referring to
Make the manufacture of device, the command device realize in one flow process of flow chart or one square frame of multiple flow processs and/or block diagram or
The function of specifying in multiple square frames.
These computer program instructions also can be loaded in computer or other programmable data processing devices so that in meter
Series of operation steps is performed on calculation machine or other programmable devices to produce computer implemented process, so as in computer or
The instruction performed on other programmable devices is provided for realizing in one flow process of flow chart or multiple flow processs and/or block diagram one
The step of function of specifying in individual square frame or multiple square frames.Obviously, those skilled in the art can carry out various to the present invention
Change with modification without departing from the spirit and scope of the present invention.So, if these modifications of the present invention and modification belong to this
Within the scope of bright claim and its equivalent technologies, then the present invention is also intended to comprising these changes and modification.
Claims (10)
1. a kind of high reliability on site redundant bus system, the system includes the first communication equipment, the second communication equipment and is located at
Two or more pieces independent redundancy link between described two communication equipments, it is characterised in that will respectively be located at different independence
Communication node interconnection on redundant link, so that data message is transmitting the process to the second communication equipment from the first communication equipment
In have more transmission paths.
2. field bus system as claimed in claim 1, it is characterised in that the communication node or the second communication equipment are also wrapped
Redundant message processing module is included, for rejecting the message by different paths repeated reaching.
3. field bus system as claimed in claim 2, it is characterised in that the redundant message processing module is specifically included：
Data message logging modle, time when reaching the communication node or the second communication equipment for record data message and
Data message ID；
Data message processing module, for when the communication node or the second communication equipment receive a data message, inciting somebody to action
The ID of the data message is compared one by one with all records of data message logging modle, if there is the number with identical ID
According to message receiving record, and it receives the time also not less than aging threshold, then directly return or send the identical recordings message
Corresponding response；
If there is no the data message receiving record with identical ID, although or existing and being connect with the data message of identical ID
Receive record but it receives the time more than aging threshold, then give data the ID and current timestamp information of the data message
Message accounting module is recorded, and then processes the data message.
4. high reliability redundant network system as claimed in claim 3, it is characterised in that by logical in communication node or second
Set up fifo queue on letter equipment to preserve the ID and current timestamp information of the data message for receiving.
5. high reliability redundant network system as claimed in claim 3, it is characterised in that each record length is 128 ratios
It is special.
6. a kind of redundant network data processing method, it is characterised in that when the communication node or communication equipment on link is received
During one data message, the ID of the data message is connect with all messages of preservation on the communication node or the second communication equipment
Receive record be compared one by one, if there is the data message receiving record with identical ID, and its receive time also not less than
Aging threshold, then directly return or send the corresponding response of the identical recordings message；
If there is no the data message receiving record with identical ID, although or existing and being connect with the data message of identical ID
Receive record but it receives the time more than aging threshold, then the ID and current timestamp information of the data message are preserved, so
Post-process the data message.
7. data processing method as claimed in claim 6, it is characterised in that by communication node or the second communication equipment
Set up fifo queue to preserve the ID and current timestamp information of the data message for receiving.
8. data processing method as claimed in claim 6, it is characterised in that each record length is 128 bits.
9. a kind of redundant network data processing equipment, it is characterised in that include：
Data message logging modle, for time during record data message arrival communication equipment and data message ID；
Data message processing module, for when the communication equipment receives a data message, by the data message
ID is compared one by one with all records of data message logging modle, and if there is the data message with identical ID note is received
Record, and it receives the time also not less than aging threshold, then directly return or send the corresponding response of the identical recordings message；
If there is no the data message receiving record with identical ID, although or existing and being connect with the data message of identical ID
Receive record but it receives the time more than aging threshold, then give data the ID and current timestamp information of the data message
Message accounting module is recorded, and then processes the data message.
10. data processing equipment as claimed in claim 9, it is characterised in that by setting up FIFO on the communication equipment
Queue is preserving the ID and current timestamp information of the data message for receiving.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710084990.5A CN106603366A (en) | 2017-02-17 | 2017-02-17 | High-reliability redundant field bus system, and data processing method and apparatus |
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| CN201710084990.5A CN106603366A (en) | 2017-02-17 | 2017-02-17 | High-reliability redundant field bus system, and data processing method and apparatus |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110312141A (en) * | 2019-07-05 | 2019-10-08 | 杭州当虹科技股份有限公司 | A kind of event mode internet live broadcasting method |
| CN115604481A (en) * | 2022-11-28 | 2023-01-13 | 成都索贝数码科技股份有限公司（Cn） | Method, device and system for improving codec and transmission parallelism |
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| US6175571B1 (en) * | 1994-07-22 | 2001-01-16 | Network Peripherals, Inc. | Distributed memory switching hub |
| CN102082696A (en) * | 2011-03-10 | 2011-06-01 | 中控科技集团有限公司 | Redundancy network system and message sending method based on same |
| CN102082695A (en) * | 2011-03-07 | 2011-06-01 | 中控科技集团有限公司 | Hot standby redundancy network system and redundancy realization method |
| CN104954105A (en) * | 2014-03-25 | 2015-09-30 | 西门子公司 | Receiver network component, communication network and method for operating communication network |
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2017
- 2017-02-17 CN CN201710084990.5A patent/CN106603366A/en active Pending
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US6175571B1 (en) * | 1994-07-22 | 2001-01-16 | Network Peripherals, Inc. | Distributed memory switching hub |
| CN102082695A (en) * | 2011-03-07 | 2011-06-01 | 中控科技集团有限公司 | Hot standby redundancy network system and redundancy realization method |
| CN102082696A (en) * | 2011-03-10 | 2011-06-01 | 中控科技集团有限公司 | Redundancy network system and message sending method based on same |
| CN104954105A (en) * | 2014-03-25 | 2015-09-30 | 西门子公司 | Receiver network component, communication network and method for operating communication network |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110312141A (en) * | 2019-07-05 | 2019-10-08 | 杭州当虹科技股份有限公司 | A kind of event mode internet live broadcasting method |
| CN115604481A (en) * | 2022-11-28 | 2023-01-13 | 成都索贝数码科技股份有限公司（Cn） | Method, device and system for improving codec and transmission parallelism |
| CN115604481B (en) * | 2022-11-28 | 2023-04-18 | 成都索贝数码科技股份有限公司 | Method, device and system for improving parallelism of encoding and decoding and transmission |
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