CN206422785U - A kind of high reliability on site redundant bus system and data processing equipment - Google Patents
A kind of high reliability on site redundant bus system and data processing equipment Download PDFInfo
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- CN206422785U CN206422785U CN201720141918.7U CN201720141918U CN206422785U CN 206422785 U CN206422785 U CN 206422785U CN 201720141918 U CN201720141918 U CN 201720141918U CN 206422785 U CN206422785 U CN 206422785U
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Abstract
The utility model discloses a kind of high reliability redundant network system and data processing equipment, the system includes the first communication equipment, the second communication equipment and the two or more pieces independent redundancy link between described two communication equipments, it is characterized in that, by the communication node interconnection being located at respectively on different independent redundancy links, so that data message has more transmission paths during being transmitted from the first communication equipment to the second communication equipment.The utility model breaches the pattern of each redundant channel of traditional redundant network mutually independently with isolation, has higher reliability and fault-tolerance than traditional redundant network.
Description
Technical field
The utility model is related to communication technical field, and in particular to a kind of high reliability on site redundant bus system and data
Processing unit.
Background technology
Pursuit of the mankind to data transmission credibility is endless, especially in aerospace field, and people attempt each
The technology for planting various kinds is used for ensureing the reliable of data transfer.The method that raising data transmission credibility is most simply commonly used is exactly to increase
Extra data channel, as shown in figure 1, designing to improve terminal 1 by remaining subregion A and remaining subregion B dual redundant passage
The reliability of data transfer between terminal 2.If dual redundant passage is still inadequate, it is independent that general way is to continue with increase
Redundant channel, however, the extra data channel of increase means to a set of extra connection equipment of increase and circuit, so
Hardware cost can be greatly improved, and also results in a series of problems in design.How as far as possible few increase hardware device
The reliability of data transfer can be improved again, to require higher networking scene applied to data transmission credibility, especially navigated
The bus system of empty space flight association area, is technical problem to be solved in the utility model.
The content of the invention
In view of above-mentioned the deficiencies in the prior art, the utility model proposes a kind of high reliability on site redundant bus system and
Data processing equipment.
According to one side of the present utility model, there is provided a kind of high reliability on site redundant bus system, the system bag
Include the first communication equipment, the second communication equipment and the two or more pieces independent redundancy chain between described two communication equipments
Road, it is characterised in that interconnect the communication node being located at respectively on different independent redundancy links, so that data message is from the
One communication equipment has more transmission paths during transmitting to the second communication equipment.
The communication node or the second communication equipment also include redundant message processing module, and different paths are passed through for rejecting
The message of repeated reaching.
The redundant message processing module is specifically included：Data message logging modle, being reached for record data message should
Time and data message ID during communication node；Data message processing module, for being set in the communication node or the second communication
For when receiving a data message, the ID of the data message and all records of data message logging modle are compared one by one
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 returns
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 give data message logging modle and recorded, and then handle the data message.
According to other side of the present utility model, additionally provide a kind of data processing equipment to complete on site redundant bus
Redundant message processing in system, the data processing equipment can be located at communication node or data message on redundant link
Receiving device.The data processing equipment is specifically included：
Data message logging modle, 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 datagram
The ID and all records of data message logging modle of text are compared one by one, are connect if there is the data message with identical ID
Record is received, and it receives the time also not less than aging threshold, then directly returns to or send the corresponding sound of the identical recordings message
Should；
If there is no the data message receiving record with identical ID, although or in the presence of the datagram with identical ID
Literary receiving record but its receive time exceed aging threshold, then the ID and current timestamp information of the data message are given
Data message logging modle is recorded, and then handles the data message.
Compared with prior art, the utility model has broken the structure that each remaining subregion of traditional redundant network is mutually isolated,
Originally independent each redundant link is interconnected so that data can carry out packet transmission by more mulitpath, greatly
The big reliability for improving data transfer reduces hardware device as far as possible again.Simultaneously in order to which the forwarding solved due to interchanger may be led
Target network node is caused to receive many parts of same packets, by the transmitting message that is received to each communication node of network
Reason, can be achieved to filter out repeated data, so as to only retain the advantage for the redundant network that the utility model is proposed, and can remove
Its shortcoming, the final demand for making it meet user.
Brief description of the drawings
Fig. 1 shows the transmission structure schematic diagram of traditional redundant network.
Fig. 2 shows the transmission structure schematic diagram according to high reliability redundant network of the present utility model.
Fig. 3 shows traditional redundant network data transfer path 1.
Fig. 4 shows traditional redundant network data transfer path 2.
Fig. 5 shows the increased data transfer path 3 of redundant network of the present utility model.
Fig. 6 shows the increased data transfer path 4 of redundant network of the present utility model.
Fig. 7 shows the Redundancy Management flow chart of communication node.
Fig. 8 shows communication node link layer data process chart.
Fig. 9 shows communication node transport layer data process chart.
Embodiment
The utility model is described in further detail below in conjunction with the accompanying drawings.
With reference to transmission structure schematic diagram and Fig. 2 the high reliability redundant network of the present utility model of Fig. 1 traditional redundant network
The transmission structure schematic diagram of network can be seen that the utility model and be directed to traditional redundant network on hardware device only for remaining point
Area A, B add data interconnection equipment, and hardware increase cost is minimum.But the data transfer path of traditional redundant network only has such as
Two paths shown in Fig. 3 and Fig. 4, the redundant network after the utility model is improved can then increase by two extra reports of Fig. 5 Fig. 6
Literary transmission path, it is clear that the increase in path substantially increases the reliability of data transfer, while not increasing too many hardware again
Equipment.
In redundant network of the present utility model, while opening 4 transmission paths shown in Fig. 3-Fig. 6, whole network is
Real-time Reconstruction, namely any time, as long as any one paths therein are normal, data transfer can succeed.It is superfluous with tradition
Co-net 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
It is schematical, the remaining subregion of traditional redundant network can also be two or more, as long as by the communication in different remaining subregions
The redundant network of the present utility model with more transmission paths can be formed by forming network by interconnection between node.
In the case of all transmission path standard-sized sheets, 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, a message may also arrive at same in different time
Individual equipment.The utility model enables all devices in network by contrasting the partial parameters of message, rejects the report of repeated reaching
Text, this process is referred to as redundancy management.
The core of redundancy management of the present utility model is：
1) in an interchanger, a message is only handled 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 coiling occurs for command sequence number,
Protocol specification should ensure that UPID uniqueness：
The UPID of table 1 is constituted
In order to realize the purpose of duplicate message filtering, it is necessary to all carry out redundancy to communication nodes such as network node and interchangers
Management.The Redundancy Management of communication node includes 2 layers of processing, and first layer is link layer Redundancy Management, and the second layer is transport layer management,
As shown in Figure 7.
It is specific as follows as Fig. 8 shows communication node link layer data process chart：
Step 1：A global 256 grade fifo queue is initially set up, word width 128bits is recorded, total length is 4K words
Section；Each record is included：Timestamp（64bits）+ UPID（48bits）+ retain（16bits）；
Step 2：When receiving a heading, first with " Timestamp ' 64b+UPID ' 48b+0 ' 16b " formation one
Bar is recorded, and then this record is compared one by one with all record RecX in fifo queue.If in fifo queue
Record already exceed 5.2ms（For 1GE networks）, then show that this records weathered, skip over this record.If FIFO teams
Record in row is also within life cycle, and the UPID of messages of the UPID of the record with newly receiving is identical, then shows this message
It has been be processed that, return, the message is not reprocessed.If the report of all records all not with receiving within life cycle
The UPID of text is identical, and it is a newly arrived message to show this, the record " Timestamp ' 64b+UPID ' of this new message
48b+0 ' 16b " are pressed into fifo queue, then handle this message.
In initialization, the full memory space of fifo queue is reset.In addition, being received directly returning or handling
Before the message arrived, 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 further Redundancy Management of re-transmission progress in link layer, the order to repeatedly retransmitting, only
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 that the judgement of duplicate message is carried out using UPID, but passes through 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
The data processing of transport layer stores history message information, specific processing stream also with 256 grades of FIFO
Journey is as shown in Figure 9：
Step 1：A global 256 grade fifo queue is initially set up, word width 128bits is recorded, total length is 4K words
Section；Each record is included：Timestamp（64bits）+ UPID（30bits）+ retain（34bits）；
Step 2：When receiving a complete message, first with " Timestamp ' 64b+UMID ' 30b+0 ' 34b " formation
One record, is then one by one compared this record with all record RecX in fifo queue.If fifo queue
In record already exceed 5.2ms（For 1GE networks）, then show that this records weathered, skip over this record.If FIFO
Record in queue is also within life cycle, and the UMID of messages of the UMID of the record with newly receiving is identical, then shows that this is reported
Text has been processed, and is returned, and sends former response.If the message of all records all not with receiving within life cycle
UMID it is identical, it is a newly arrived message to show this, the record " Timestamp ' 64b+UMID ' 30b of this new message
+ 0 ' 16b " is pressed into fifo queue, then handles this message, and the response message is sent after response message is stored in queue.
Above-mentioned transport layer is embodied in 2 aspects with link layer to the processing 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.It is judged as after redundant message, be
The corresponding responses of UMID are searched in historical responses queue, if response is present, and this response message does not have aging also, 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 that table
Bright is the response of the message to this re-transmission.
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
After message, ensuing test serial number and UMID all will be used in history.Though FIFO cachings depth is only
Have 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 occur different
The sequence number and UMID of message are identical to cause Message processing mistake；
Second of situation, some node just restarts after have sent several messages, and SEQ restarts.If this
When network load it is very light, the SEQ that newly produces is entirely possible to be also present in FIFO, so as to can cause to judge to fail.So, and
Shi Laohua messages are still quite necessary.
It should be noted that aforementioned embodiments can not only 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, above-mentioned redundancy report can also be completed in receiving terminal
The data processing of text, it is final to cause target network node only to handle a same packet.
Claims (8)
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 two communication equipments, it is characterised in that different independent redundancies will be located at respectively
Communication node interconnection on link, so that data message has during being transmitted from the first communication equipment to the second communication equipment
There are 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 path repeated reachings.
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 and all records of data message logging modle are compared one by one, 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 returns to or send the identical recordings message
Corresponding response；
If there is no the data message receiving record with identical ID, although or being connect in the presence of the data message with 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 handles the data message.
4. field bus system as claimed in claim 3, it is characterised in that by communication node or the second communication equipment
Fifo queue is set up to preserve the ID and current timestamp information of the data message received.
5. field bus system as claimed in claim 3, it is characterised in that each record length is 128 bits.
6. a kind of data processing equipment, it is characterised in that including：
Data message logging modle, time and data message ID during for record data message arrival communication equipment；
Data message processing module, for when the communication equipment receives a data message, by the data message
ID and all records of data message logging modle are compared one by one, are received and are remembered if there is the data message with identical ID
Record, and it receives the time also not less than aging threshold, then directly returns to or send the corresponding response of the identical recordings message；
If there is no the data message receiving record with identical ID, although or being connect in the presence of the data message with 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 handles the data message.
7. data processing equipment as claimed in claim 6, it is characterised in that by setting up FIFO teams on the communication equipment
Arrange to preserve the ID and current timestamp information of the data message received.
8. data processing equipment as claimed in claim 6, it is characterised in that each record length is 128 bits.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201720141918.7U CN206422785U (en) | 2017-02-17 | 2017-02-17 | A kind of high reliability on site redundant bus system and data processing equipment |
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| CN201720141918.7U CN206422785U (en) | 2017-02-17 | 2017-02-17 | A kind of high reliability on site redundant bus system and data processing equipment |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108051071A (en) * | 2017-12-07 | 2018-05-18 | 国网河南省电力公司电力科学研究院 | Distribution type fiber-optic vibration detecting device based on indoor OPGW |
| CN113346983A (en) * | 2021-08-03 | 2021-09-03 | 浙江国利信安科技有限公司 | EPA equipment with mirror redundancy and EPA system |
-
2017
- 2017-02-17 CN CN201720141918.7U patent/CN206422785U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108051071A (en) * | 2017-12-07 | 2018-05-18 | 国网河南省电力公司电力科学研究院 | Distribution type fiber-optic vibration detecting device based on indoor OPGW |
| CN113346983A (en) * | 2021-08-03 | 2021-09-03 | 浙江国利信安科技有限公司 | EPA equipment with mirror redundancy and EPA system |
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