CN104866399B - UM-BUS bus run Failure Detection Controller and detection method - Google Patents
UM-BUS bus run Failure Detection Controller and detection method Download PDFInfo
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Abstract
A kind of UM-BUS bus run Failure Detection Controller and detection method, the channel failure detection controller includes channel health status table, detect state of a control machine and Air conduct measurement communication controler, using the three-stage channel failure detection method and layer-stepping Controlling model of " order-response-confirmation ", realize to the on-line real-time measuremen of UM-BUS bus run failure with it is dynamically labeled, UM-BUS bus is enabled to pass through dynamic restructuring, communication data is dynamically assigning on healthy channel and is transmitted, it ensure that correct communication of the bus in the case where channel is broken down.
Description
Technical field
The present invention relates to a kind of bus run Failure Detection Controller and detection methods, particularly, are related to UM-BUS bus
Channel failure detects controller and detection method.
Background technique
Dynamic reconfigurable high-speed serial bus (UM-BUS bus) is that one kind can be organic with redundancy fault-tolerant by high-speed communication
It is unified, the high-speed serial bus with Remote Expansion ability.It is based on M-LVDS (Multipoint Low Voltage
Differential Signaling, multiple spot low-voltage differential signal) signal transmission form, using bus type topological structure；It is logical
Crossing multichannel concurrent fashion can provide the up to traffic rate of 6.4Gbps；It can be to multiple buses by the dynamic restructuring of multichannel
It is carried out with node failure fault-tolerant；With Remote metering system ability, can be provided for the Remote Expansion of embedded system strong
Support；With link state self-checking function, online real-time dynamic monitoring can be carried out to bus run health status.
Dynamic restructuring is the key technology that UM-BUS realizes concurrent transmission and dynamic fault-tolerant, it passes through in each node of bus
It establishes and safeguards a channel health status table, communication data is dynamically assigning on correct channel transmits accordingly, thus
To channel failure carry out shielding with it is fault-tolerant.
CN102622323B discloses the data transfer management based on switch matrix in a kind of dynamic reconfigurable universal serial bus
Method utilizes channel failure state table, passes through switch matrix data transfer management array dynamic management buffer area and not fixed number
The data in mesh channel are transmitted, and are assigned to making data balancing on effective channel, are realized the dynamic restructuring of data under malfunction.
The key foundation of dynamic reconfigurable universal serial bus is that online inspection in real time is carried out to bus run failure, node failure
It surveys, the channel health status table of real-time update communication node, guarantees normal communication of the UM-BUS bus under channel failure state.
Bus run fault detection method in the prior art speed, in terms of be not able to satisfy this requirement.
Summary of the invention
The invention reside in a kind of UM-BUS bus run Failure Detection Controller and detection method is provided, realize logical to bus
The real-time online detection of road failure, node failure, and according to failure detection result, dynamic updates communication node involved in failure
In health status table.
A kind of technical solution that the present invention is taken to achieve the above object are as follows: UM-BUS bus run fault detection control
Device, it is characterised in that: including channel health status table, detection state of a control machine and Air conduct measurement communication controler, wherein described
Channel health status table is the two-dimensional table established according to the master and slave node connection situation of communication of UM-BUS bus run；It is described
Sense command of the state of a control machine according to upper layer or the sense command packet from channel host node are detected, Air conduct measurement mistake is started
Journey realizes the timing of different detecting states, controls the transmitting-receiving that the Air conduct measurement communication controler carries out Air conduct measurement data packet,
Complete the update to channel health status table；The Air conduct measurement communication controler is set on each bus run, described
Under the control for detecting state of a control machine, framing and the parsing of Air conduct measurement packet are completed, is carried out on bus run by channel MAC
Sending and receiving for detection data packet, judges channel failure.
The present invention also provides use UM-BUS bus run Failure Detection Controller to carry out the detection of UM-BUS bus failure
Method, it is characterised in that: host node fault detection includes the following steps:
(1) reset passages health status table；
(2) host node from all channels simultaneously to sending a sense command packet respectively from node, and start one it is fixed
When device, when being timed to pre-determined bit after be transferred to step (3)；
(3) host node resets its timer, restarts timing, the detection response sent from each channel reception from node
Packet, when being timed to pre-determined bit after be transferred to step (4)；
(4) host node resets its timer, after restarting timing, from it is all receive detection response bag channels on to
Send detection confirmation packet from node, it is undetermined when pre-determined bit after terminate Air conduct measurement process, the channel updated in host node is strong
Health state table；
Include the following steps: from node failure detection
(a) after receiving sense command packet, start timer from node, timing is transferred to step (b) to after when being pre-positioned；
(b) reset from node by its timer, restart timing, and from each channel for receiving sense command packet to
Host node loopback detects response bag, is periodically transferred to step (c) to after when being pre-positioned；
(c) it is reset from node by its timer, restarts timing, from all channels for sending detection response bag, connect
Receive detection confirmation packet, it is undetermined up to pre-determined bit when after, terminate Air conduct measurement process from node, with host node synchronized update oneself
Channel health status table.
UM-BUS bus run Failure Detection Controller according to the present invention and detection method, using " order-response-is true
Recognize " three-stage channel failure detection method and layer-stepping Controlling model, realize to the online of UM-BUS bus run failure
Real-time detection with it is dynamically labeled.Enable UM-BUS bus by dynamic restructuring, it is logical that communication data is dynamically assigning to health
It is transmitted on road, ensure that correct communication of the bus in the case where channel is broken down.
Detailed description of the invention
Fig. 1 is UM-BUS bus topolopy figure；
Fig. 2 is UM-BUS bus protocol model and data flow diagram；
Fig. 3 is UM-BUS bus run detection data packet format；
Fig. 4 is UM-BUS bus failure detection method schematic diagram；
Fig. 5 is UM-BUS bus failure detector structural model.
Specific embodiment
UM-BUS bus uses the bus topolopy of the concurrent redundancy of multichannel based on M-LVDS technology, supports most 30
A communication node direct interconnection does not need router or adapter required when usual high-speed bus networking；It is logical using 2~32
Road concurrent transmission improves bus communication speed, and highest communication rate is up to 6.4Gbps；Pass through the dynamic redundancy and failure of multichannel
Reconstruct the dynamic fault-tolerant, it can be achieved that most 31 channel failures；Using the Remote metering system agreement of principal and subordinate's command response formula,
Flexible long-range non intelligent extended capability is provided for system.The topological structure of UM-BUS bus is as shown in Figure 1.
As shown in Fig. 2, UM-BUS communication protocol is divided into three process layer, data link layer, physical layer levels.Data link
Layer is divided into data buffering sublayer, transmission sublayer and media access control sublayer again.
Process layer is the top layer of UM-BUS Communication Protocol Model, completes the management work of bus communication and by partial information
Feed back to external equipment or upper layer application.
Data link layer completes channel failure management and data dynamically distribute function, is the core of UM-BUS bus protocol
Point.Wherein data buffering sublayer provides a 260x32 Data Buffer Memories, is used in communication process to communication number
According to being stored；Media access control sublayer completes channel management, fault detection, the maintenance of channel health status table, channel data framing and frame decoding
Etc. functions；It transmits the grouping transmission that sublayer realizes communication data and realizes data in healthy channel according to channel health status table
Equilibrium assignment.
UM-BUS bus uses Double-strand transmission, and using 8b/10b coding mode, physical layer completes data encoding and decoding, mistake
Verification, character synchronization, clock such as synchronize at the functions.
When data communication, transmitting terminal keeps in data buffering layer by processing layer building communication data packet.Then by transmitting
Sublayer carries out dynamic restructuring to outgoing data according to the channel health status information table from media access control sublayer, and data packet dynamic is equal
Weighing apparatus is assigned in all available channels.The packaging that physical layer receives and dispatches packet data package, by 8b/10b encoding and decoding
It is converted into bit stream transmission.
In receiving end, physical layer flows into row clock to bit and synchronizes, and 8b/10b decoding, channel data unpacks.Then by passing
Defeated sublayer carries out dynamic organization to data according to the channel health status information table from media access control sublayer, and data buffering layer is arrived in storage,
Application layer is delivered by process layer to use.
No matter data send or receive, and UM-BUS bus communication both sides require in its media access control sublayer, to bus run
Health status is detected, and establishes a mutually coordinated consistent channel health status table.Meanwhile to guarantee the correct of communication
Property and real-time, channel health status detection process must be reliable complete, and the bus bandwidth more than Mrs cannot be expended.
According to the analysis to bus topolopy and physical link, the communication channel failure of UM-BUS bus can be divided into channel
Line fault, node circuit failure two major classes.Port line failure normally results in all communication nodes all cannot be logical in failure
Dao Shangzhen's normal open letter；The normal communication of this section point and node circuit failure often only has an impact；But no matter which kind of failure all can
Cause communicating pair that cannot correctly interactively communicate data on the channel that failure is related to.
For the process fault detection for simplifying UM-BUS bus, communication bandwidth, and the communication for enabling to failure unrelated are saved
The communication of node is not influenced by failure, keeps higher traffic rate.The health status table of UM-BUS bus presses communicating pair section
Point establishes a two-dimensional table.By taking node 1 as an example, the channel health status table in UM-BUS bus node is as shown in table 1.
The corresponding physical channel of each column of table 1, indicates that channel health is available for 1, indicates that channel failure is unavailable for 0；
The corresponding UM-BUS bus node of every row, indicates that channel when node 1 is communicated with the node can use situation.UM-BUS bus branch
It holds 32 nodes and 32 channels is concurrent, therefore table size is 32x32.UM-BUS bus protocol interior joint 0 and 31 is to retain
Node, each node cannot be communicated with itself, therefore the corresponding behavior full 0 of 1 interior joint of table 0,1,31.
The channel health status table of 1 node 1 of table
When channel is broken down, it will not pass through faulty channel between related master and slave node and carry out data interaction.
Therefore, host node and between node by the mutual Transfer pipe detection data packet in each channel, so that it may determine that bus is logical
Whether health is available in road, to achieve the purpose that detect failure.For this purpose, the present invention designs channel inspection as shown in Figure 3
Measured data packet.In the detection process, main and subordinate node carries out the mutual transmission of detection data packet respectively on each channel.
In detection data packet, sense command is a 8b/10b control word, for identifying the beginning of a detection packet, simultaneously
The type of detection data packet is also given, 8b/10b control word K28.0, K28.1, K28.2 respectively indicate sense command, detection is answered
It answers, detect three kinds of different detection data packets of confirmation.
Destination node number indicates the node for receiving detection data packet, with 5 binary representation nodes 0~31.Source node number
Indicate the node of the transmission detection data packet, same 5 binary representations.Channel position is the channel for transmitting detection data packet
Physical order number in detection host node side, with 5 binary representation channels 0~31.Check bit is to destination node number, source
The odd of node number, channel position and 8 reserve bytes.Destination node number, source node number, channel position and check bit totally 16
Position, is divided into two data bytes and is transmitted.
Reserve bytes in detection data packet carry out the use of channel transfer delay measurements for UM-BUS bus, with fault detection
Itself is unrelated.
According to UM-BUS bus transfer protocol, detection data packet is carried out when bus run transmits, by physical layer by byte
After 8b/10b coding, reformulates physical layer transmission frame and transmitted.When single channel communications rate is 100Mbps, a UM-
BUS bus run detection data packet is when the transmission time on bus run is 90~116 (every when 10ns).Wherein physics
Layer transmission frame frame head, postamble and bus retention time totally 50 when, at detection data bag data 40, line transmission delay is maximum
At 26.
Channel health status table is all reset to 0 when resetting by each node of UM-BUS bus.Then by communication host node
Air conduct measurement, setting host node and the corresponding corresponding line from the channel health status table in node are carried out to each node respectively.
When UM-BUS bus host node finds mistake (time-out or error in data) in communication process, can also be started by host node to logical
The Air conduct measurement of believer in a certain religion's node corrects the corresponding line in the channel health status table in master and slave node according to testing result.
The Air conduct measurement of UM-BUS bus is always initiated by communication host node, and target is opened using communication as few as possible
Pin, detects the line fault and node circuit failure of communication channel, the healthy shape in the master and slave node M AC sublayer of synchronized update
State table.For this purpose, the present invention is using " order-response-confirmation " three-stage channel failure detection as shown in Figure 4 and health status table
Air conduct measurement process is divided into three phases by update method: 1. sense command transmission phase, 2. detecting state acknowledgment phase and 3.
Testing result confirmation stage.Each stage sends corresponding detection packet by host node or from node respectively.Since detection packet uses
Each phases-time length when transmission time is 90~116, therefore, it is total to be fixed as 128 UM-BUS by fixed format
When line transmits position (when channel rate is 100Mbps, total 1280ns).
For host node, after the detection enabling signal for receiving upper layer, 1. into sense command transmission phase, from all channels
It is upper and to start a timer simultaneously to sending a sense command packet respectively from node, when being timed to 128 after, be transferred to inspection
Survey state acknowledgment phase is 2..
Detecting state acknowledgment phase 2., its timer clear 0 is restarted timing, received from each channel by host node
The detection response bag sent from node.After when timing is to 128, it is transferred to testing result confirmation stage 3..
3. into testing result confirmation stage, host node restarts timing equally by timer clear 0.Then, from all
It receives and sends detection confirmation packet to from node on the channel of detection response bag.It is undetermined when 128 after, terminate Air conduct measurement mistake
Journey updates the channel health status table in host node.
During Air conduct measurement, if a certain channel can receive detection response bag, indicate that main and subordinate node can be logical by this
Road normal communication is marked as healthy channel in health status table.Otherwise, there is failure in port line or node, lead,
From node cannot normal communication on that channel, be marked as faulty channel.
For from node, Air conduct measurement process is passively.When a certain channel is received to the sense command packet of this node
Afterwards, sense command transmission phase is immediately entered 1. from node, and start a timer.Due to detection packet the delivery time be 90~
At 116, from node most soon sense command packet issue 90 when after could receive it completely.Therefore, from the timing of node
Device timing since 90.After when timing is to 128, the normal channel of institute should all receive sense command packet, be transferred to from node
Detecting state acknowledgment phase is 2..
Detecting state acknowledgment phase 2., from node by its timer clear 0, restart timing, and receive inspection from each
It surveys on the channel of order packet and detects response bag to host node loopback.Then, periodically to 128 when after, be transferred to testing result confirmation
Stage is 3..
3. into testing result confirmation stage, restart timing equally by timer clear 0 from node.Then, from all
On the channel for sending detection response bag, detection confirmation packet is received.It is undetermined when 128 after, all correct channels should all receive
The detection confirmation packet sent to host node, terminates Air conduct measurement process from node, strong with the channel of host node synchronized update oneself
Health state table.
During Air conduct measurement, if a certain channel can receive detection confirmation packet, indicate that main and subordinate node can be logical by this
Road normal communication is marked as healthy channel in health status table.Otherwise, there is failure in port line or node, lead,
From node cannot normal communication on that channel, be marked as faulty channel.
UM-BUS bus supports 2~32 channel concurrent transmissions, and to improve detection efficiency, the bandwidth for reducing Air conduct measurement is opened
Pin when Air conduct measurement, using parallel mode, carries out the interaction of detection packet simultaneously on all channels, to all channels simultaneously into
Row detection.In addition, reducing resource overhead to simplify Air conduct measurement logic, use when realization " centralized control independent communication "
UM-BUS bus run detection controller is divided into detection state of a control machine A-MAC and channel as shown in Figure 5 by hierarchical control model
Detect communication controler C-MAC two parts.
A-MAC is the core for detecting controller, according to the sense command on upper layer or come the sense command of autonomous node
Packet starts Air conduct measurement process, realizes the timing of different detecting states, and control C-MAC carries out the transmitting-receiving of Air conduct measurement data packet,
Complete the update to channel health status table.
An Air conduct measurement communication controler C-MAC is arranged in each UM-BUS bus run, complete under the control of A-MAC
Framing and parsing at Air conduct measurement packet carry out the reception and transmission of detection data packet by channel MAC on bus run, right
Channel failure is judged.
Claims (2)
1. a kind of method for carrying out the detection of UM-BUS bus failure using UM-BUS bus run Failure Detection Controller, feature
It is: the UM-BUS bus run Failure Detection Controller, including channel health status table, detection state of a control machine and channel
Communication controler is detected, wherein the channel health status table is the master and slave node connection of communication according to UM-BUS bus run
The two-dimensional table that situation is established；The detection state of a control machine is according to the sense command on upper layer or the inspection from channel host node
Survey order packet, start Air conduct measurement process, realize the timing of different detecting states, control the Air conduct measurement communication controler into
The update to channel health status table is completed in the transmitting-receiving of row of channels detection data packet；The Air conduct measurement communication controler setting
In on each bus run, under the control of the detection state of a control machine, framing and the parsing of Air conduct measurement packet is completed, is passed through
Channel MAC carries out sending and receiving for detection data packet on bus run, judges channel failure；The UM-BUS is total
The method of line fault detection includes host node fault detection and detects from node failure:
Host node fault detection includes the following steps:
(1) reset passages health status table；
(2) host node and starts a timer simultaneously to sending a sense command packet respectively from node from all channels,
Step (3) are transferred to after when being timed to pre-determined bit；
(3) host node resets its timer, restarts periodically, the detection response bag sent from each channel reception from node,
Step (4) are transferred to after when being timed to pre-determined bit；
(4) host node resets its timer, after restarting timing, from Xiang Congjie on all channels for receiving detection response bag
Point send detection confirmation packet, it is undetermined up to pre-determined bit when after terminate Air conduct measurement process, update host node in channel health shape
State table；
Include the following steps: from node failure detection
(a) after receiving sense command packet, start timer from node, timing is transferred to step (b) to after when being pre-positioned；
(b) it is reset from node by its timer, restarts timing, and to main section from each channel for receiving sense command packet
Point loopback detects response bag, is periodically transferred to step (c) to after when being pre-positioned；
(c) it is reset from node by its timer, restarts timing, from all channels for sending detection response bag, receive inspection
Survey confirmation packet, it is undetermined up to pre-determined bit when after, terminate Air conduct measurement process from node, the channel with host node synchronized update oneself
Health status table.
2. according to the method described in claim 1, it is characterized by: when pre-determined bit is 128 UM-BUS bus transfer positions
When.
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| CN105323133A (en) * | 2015-11-12 | 2016-02-10 | 浙江大学 | CAN bus redundant communication method and system |
| CN107229039B (en) * | 2017-07-02 | 2021-02-19 | 中国航空工业集团公司雷华电子技术研究所 | Radar frame fault detection method |
| CN107894764B (en) * | 2017-12-21 | 2023-06-20 | 重庆金鑫科技产业发展有限公司 | Data detection equipment |
| US20190286537A1 (en) * | 2018-03-13 | 2019-09-19 | Carrier Corporation | Detection of wiring faults in serial bus connected components |
| CN109595687B (en) * | 2018-12-17 | 2021-02-26 | 长春工业大学 | Electric heating DCS control system, fault diagnosis method and fault tolerance method of electric heating DCS control system |
| CN113253698B (en) * | 2021-03-01 | 2024-06-25 | 东软睿驰汽车技术（沈阳）有限公司 | Detection device and electric automobile |
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