CN105530124B - A kind of AFDX end system failure fast positioning method - Google Patents
A kind of AFDX end system failure fast positioning method Download PDFInfo
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- CN105530124B CN105530124B CN201510902280.XA CN201510902280A CN105530124B CN 105530124 B CN105530124 B CN 105530124B CN 201510902280 A CN201510902280 A CN 201510902280A CN 105530124 B CN105530124 B CN 105530124B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L41/00—Arrangements for maintenance, administration or management of data switching networks, e.g. of packet switching networks
- H04L41/06—Management of faults, events, alarms or notifications
- H04L41/0677—Localisation of faults
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Abstract
The invention belongs to computer network software technical fields, and in particular to AFDX end system failure fast positioning method.This method sufficiently proves the fault type of end system first, secondly it is directed to different fault type failure definition parameters, and failure definition parameter storage address, then by end system according to current working status real-time update fault parameter, inquire the memory space of fault parameter, fault parameter is obtained, it is final to determine that fault type completes fault location.The method for not needed using this method by external fault detection device, and capable of quickly positioning AFDX end system failure is suitable for product flight-line service and upgrading, improves the availability of end system.
Description
Technical field
The invention belongs to computer network software technical fields, and in particular to AFDX end system failure fast positioning method.
Background technique
AFDX network has networking scale big and the spy of strong flexibility as avionics network transmission technology of new generation
Point, the avionics system suitable for large and medium-sized aircraft interconnect.AFDX network is made of end system, interchanger and transmission link.
AFDX end system is the important component of AFDX network, is network in each equipment applied to avionics system AFDX network
In distinct device the unified interface that connect with AFDX interchanger is provided, in realization AFDX network between each equipment securely and reliably
Data-transformation facility has the characteristics that full duplex, bandwidth are high, determining, reliable.
Based on the importance of AFDX end system, domestic and international AFDX Network Provider gives end system fault detection side
Method, these methods need special detection instrument (such as: PBA card) mostly, and need analog network verification environment.Usually detection work
The price of tool is very expensive, and on machine generally can not fast construction network verification environment, therefore how to design it is a kind of only
The method that AFDX end system fault location is rapidly completed by environment existing on machine is very necessary.
Summary of the invention
In order to solve the problems in background technique, the invention proposes one kind not to need by external fault detection device,
Suitable for product flight-line service and upgrading, the AFDX end system failure fast positioning method of the availability of end system is improved.
Technical scheme is as follows:
The invention proposes a kind of AFDX end system failure fast positioning methods, which comprises the following steps:
1) according to AFDX end system operative scenario, the fault type of AFDX end system is obtained；
2) it by analyzing fault type, obtains to be used to identify the fault parameter of fault type, and provide event
Hinder parameter definition；
3) according to the working condition of AFDX end system, the storage and update of fault parameter are completed；
4) by the memory space of inquiry fault parameter, fault parameter is obtained；
5) according to fault parameter, determine that fault type completes fault location.
Above-mentioned fault type includes hardware fault, link layer fault, IP or UDP layer failure, software operation troubles.
Above-mentioned hardware fault includes AES port failure, RTC time stamp failure, FLASH failure, cpu fault, SDRAM event
Barrier, DPRAM failure, pci bus failure；
The link layer fault includes VL mistake, mac source address error, MAC destination address mistake；
The IP or UDP layer failure include IP address mistake, UDP address error, crc error；
The software operation troubles includes AES software operation state, software version information, allocation list version information.
Above-mentioned fault parameter includes hardware fault parameter, link layer fault parameter, IP or UDP layer fault parameter, software fortune
Row fault parameter；
The hardware fault parameter definition is AES port failure state value, RTC time stamp failure state value, FLASH failure
State value, cpu fault state value, SDRAM failure state value, DPRAM failure state value, pci bus failure state value；
The link layer fault parameter definition is VL error count, the counting of mac source address error, MAC destination address mistake
It counts；
The IP or UDP layer fault parameter are defined as IP, UDP, crc error counts；
The software operation troubles parameter definition is application state mark, software version number and allocation list version number.
Above-mentioned failed storage uses and the fault parameter is stored in twoport buffer area, and passes through pci bus and map；Often
A kind of address of the corresponding storage space of fault type.
The present invention has the advantages that
1, the method that the present invention uses does not need to be suitable for product flight-line service by external fault detection device and rise
Grade, while improving the availability of end system.
2, failure is classified, is defined, stored and is updated by the present invention, the ground of the corresponding storage space of each failure
Location, convenient for the quick positioning of failure.
Detailed description of the invention
Fig. 1 is flow chart of the invention；
Fig. 2 is AFDX network topological diagram；
Fig. 3 is AFDX end system data flow schematic diagram.
Specific embodiment
It does not need to be suitable for product flight-line service and upgrading by external fault detection device the invention proposes one kind,
Improve the AFDX end system failure fast positioning method of the availability of end system.Method includes the following steps:
Step 1) obtains the fault type of AFDX end system according to AFDX end system operative scenario；
Identify fault type
Fig. 2 is AFDX network topological diagram, is made of an AFDX interchanger and multiple hosts with AFDX end system, is led to
The fault types such as cable failure, exchange fault can be identified by crossing end system external interface.Fig. 3 is AFDX end system workflow
Figure, is always divided into 5 levels, and the failure that may occur for every layer is identified, can be derived that the AFDX end system course of work
The middle possible fault type occurred, some types are defined as follows:
1, hardware fault:
A) AES port failure；
B) RTC time stabs failure；
C) FLASH failure；
D) cpu fault；
E) SDRAM failure；
F) DPRAM failure；
G) pci bus failure；
2, link layer fault
H) VL mistake
I) mac source address error
J) MAC destination address mistake
3, IP/UDP layers of failure
K) IP address mistake；
L) UDP address error；
M) crc error；
N) data-message size error；
4, software operation troubles
O) AES software operation state；
P) software version information；
Q) allocation list version information.
Step 2) obtains to be used to identify the fault parameter of fault type, and give by analyzing fault type
Be out of order parameter definition；
Failure definition parameter
By analyzing fault type, definition can indicate that the fault parameter of the fault type, the fault parameter are answered
For system can real-time statistics, and using storage, for fault type given above, the fault parameter of definition such as 1 institute of table
Show.
The definition of 1 fault parameter of table
Step 3) completes the storage and update of fault parameter according to the working condition of AFDX end system；
Fault parameter storage
In view of AFDX end system is integrated into host system usually as a chip or module, once design is completed,
In addition to AFDX network interface, it will not usually retain the necessary port I/O when debugging, such as debugging serial ports, but host system can be retained
Debug serial ports, therefore the fault fast positioning in order to realize end system, all fault parameters need to be stored to one piece of host and
The space that end system can access.Therefore this method is by the memory for being stored in end system of all fault parameters, and
It is to be mapped there are in DPRAM (twoport buffer area), and by pci bus, enables a system to read failure parameter at any time, portion
Divide the definition of fault parameter address as shown in table 2, wherein 0x78000000 is system virtual address, and corresponding twoport buffer area is on the spot
Location.
The definition of 2 fault parameter address of table
Step 4) obtains fault parameter by the memory space of inquiry fault parameter；
Step 5) determines that fault type completes fault location according to fault parameter.
Fault parameter updates
For the working condition for the reaction AFDX end system for keeping fault parameter strictly according to the facts, end system real-time statistics parameter is needed to believe
Breath, and it is written into corresponding space, the update of fault parameter is completed by software in this method, i.e., software can be to AFDX protocol package
Entire generation is monitored with resolving, according to different mistakes, is counted accordingly, and completes parameter update.
Fault location
After end system breaks down, fault location personnel can check all failures by the debugging serial ports of system
The memory space of parameter, and corresponding fault type is found according to fault parameter, complete fault location.
Claims (1)
1. a kind of AFDX end system failure fast positioning method, which comprises the following steps:
1) according to AFDX end system operative scenario, the fault type of AFDX end system is obtained；
2) by analyzing fault type, the fault parameter that can be used to identify fault type is obtained, and to the ginseng that is out of order
Number definition；
The fault type includes hardware fault, link layer fault, IP or UDP layer failure, software operation troubles；
The hardware fault include AES port failure, RTC time stamp failure, FLASH failure, cpu fault, SDRAM failure,
DPRAM failure, pci bus failure；
The link layer fault includes VL mistake, mac source address error, MAC destination address mistake；
The IP or UDP layer failure include IP address mistake, UDP address error, crc error；
The software operation troubles includes AES software operation state, software version information, allocation list version information；
3) according to the working condition of AFDX end system, the storage and update of fault parameter are completed；
Failed storage uses and the fault parameter is stored in twoport buffer area, and passes through pci bus and map；Each failure
The address of the corresponding storage space of type；
4) by the memory space of inquiry fault parameter, fault parameter is obtained；
The fault parameter includes hardware fault parameter, link layer fault parameter, IP or UDP layer fault parameter, software operation event
Hinder parameter；
The hardware fault parameter definition is AES port failure state value, RTC time stamp failure state value, FLASH malfunction
Value, cpu fault state value, SDRAM failure state value, DPRAM failure state value, pci bus failure state value；
The link layer fault parameter definition is VL error count, the counting of mac source address error, MAC destination address error count；
The IP or UDP layer fault parameter are defined as IP, UDP, crc error counts；
The software operation troubles parameter definition is application state mark, software version number and allocation list version number；
5) according to fault parameter, determine that fault type completes fault location.
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| CN202025062U (en) * | 2011-02-25 | 2011-11-02 | 长春晟德科技有限公司 | Small neutral earthed system fault locating device based on 3G (The 3rd Generation Telecommunication) communication network |
| CN102238577B (en) * | 2011-04-26 | 2013-12-04 | 北京锦鸿希电信息技术股份有限公司 | System for monitoring network transmission environment of global system for mobile communication for railway (GSM-R) on-vehicle wireless transmission module of China train control system (CTCS)-3 |
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