CN105187248B - A kind of redundancy switching system - Google Patents
A kind of redundancy switching system Download PDFInfo
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- CN105187248B CN105187248B CN201510595037.8A CN201510595037A CN105187248B CN 105187248 B CN105187248 B CN 105187248B CN 201510595037 A CN201510595037 A CN 201510595037A CN 105187248 B CN105187248 B CN 105187248B
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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
- H04L41/0654—Management of faults, events, alarms or notifications using network fault recovery
- H04L41/0668—Management of faults, events, alarms or notifications using network fault recovery by dynamic selection of recovery network elements, e.g. replacement by the most appropriate element after failure
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/22—Arrangements for detecting or preventing errors in the information received using redundant apparatus to increase reliability
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- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Hardware Redundancy (AREA)
- Data Exchanges In Wide-Area Networks (AREA)
Abstract
The invention discloses a kind of redundancy switching systems, and for the active-standby switch between server A and server B, which includes human-machine interface module, switching control module, communication interface handover module and power supply module；Human-machine interface module indicates current active-standby switch state and the operating status of active/standby server for selecting active-standby switch mode；Switching control module is used to acquire the active-standby switch state of human-machine interface module, and control instruction and operating status by control interface acquisition server A and server B；Switching control module by switch logic determine in server A and server B who be principal series server and who be standby be server；External communication interface is switched to fixed server by communication interface handover module according to the control instruction of switching control module.The present invention realizes the required data synchronization of redundancy and active-standby switch by hardware circuit, and reliable and stable, switching is smooth and reliable, reduces time-varying and uncertainty and risk that software exchange is brought.
Description
Technical field
The present invention relates to the superfluous of the train auto-matic control technology of urban track traffic more particularly to train automatic controlling system
Remaining switching system.
Background technology
Train automatic monitoring system (ATS) is one of the train automatic controlling system (ATC) for urban track traffic
Subsystem, it is the distributed real-time computer control system based on modern data communication network, by with time interval between to trains
The cooperation of system (ATP) and train automated driving system (ATO) is completed to high density settling pond rail vehicle transportation signal system
The automatic management of system and the control of full-automatic traffic dispatching command, provide safeguard for reliable, the Effec-tive Function of train, therefore how
Ensure that the reliability of ATS systems itself also seems particularly important.
Industry generally improves ATS reliability control systems using redundancy, that is, uses primary server and spare clothes
Business device two-node cluster hot backup, wherein core of the primary server as control system carries out service communication with outside, complete system just
Chang Gongneng, and in real time by data backed up in synchronization to standby server, and standby server not with PERCOM peripheral communication；When primary clothes
When device failure of being engaged in, system carries out active-standby switch, and standby server takes over the work of primary server, ensure business it is normal into
Row.The redundancy that industry mainly uses at present is software redundancy, i.e., realizes data synchronization and active-standby switch by software program
Redundancy.A kind of backed up in synchronization that data are carried out based on common software redundancy realization method, that is, Ethernet, with based on
Message or the mode of instruction realize active and standby control and switching, since it is simple with system structure, the low spy of hardware cost
Point is generally used in the industry.
For the software redundancy realization method that industry generally uses, its existing defect is analyzed separately below.
Software redundancy has incompleteness, since ATS system redundancies are related to all kinds of services of system, such as：It communicates, adopt
Collect, synchronize, it is difficult to the absolute success of software exchange be proved or ensure by perfect testing mechanism, because of handover mechanism
Often just work when breaking down, and the state of failure is not exclusively to service application software, and further relate to hardware
Data synchronize a series of problems between circuit, operating system, database and main preparation system, to the complete of program and malfunction
Detect extremely difficult, in addition the operating status of software systems has time variation and uncertainty, therefore by software goes to judge soft
The success or not of part switching is also incomplete.Consequence caused by the switching at crucial moment is unsuccessful for security system is
It is unaffordable.
Software redundancy can make software systems more complicated, and the failure of software systems often derives from its complexity.Active and standby service
The switching of device can be related to the switching of the relevant software programs such as communication, acquisition, application software, and in addition software exchange itself may require that
All kinds of software supports switch and ensure that operation synchronizes in system, these can all increase the complexity of software systems.Software complexity
Bring a series of other problems simultaneously, such as software redundancy switching time is long, real-time is poor, information is lost etc. in handoff procedure
Deng.
Additionally, due to active and standby system external communication interface only by software control export whether, really can not physically cut
Open close road runs software function failure thereon so when certain is failure, and communication interface is likely to generate unexpected external
Output signal causes system operation failure even to export non-secure states.
Invention content
The technical problems to be solved by the invention are just to provide a kind of redundancy switching system, using hardware redundancy system come gram
The defect for part redundant system of admitting defeated reaches and shortens switching time, ensures real-time and avoid information loss in handoff procedure
Purpose, it is ensured that system operation does not break down, and ensures safety and precise operation.
In order to solve the above technical problems, the present invention adopts the following technical scheme that：A kind of redundancy switching system is used for server
Active-standby switch between A and server B, the redundancy switching system include human-machine interface module, switching control module, communication interface
Handover module and power supply module；
The human-machine interface module indicates current active-standby switch state and active and standby clothes for selecting active-standby switch mode
The operating status of business device；
The switching control module is used to acquire the active-standby switch state of human-machine interface module, and is adopted by control interface
Collect the control instruction and operating status of server A and server B；The switching control module determines server by switch logic
In A and server B who be principal series server and who be standby be server, and result is fed back into server A by control interface
And server B, and communication interface switching command is provided by communication interface handover module of switch logic determination result, and will service
Device is active and standby and operating status feeds back to human-machine interface module；
External communication interface is switched to by the communication interface handover module according to the control instruction of switching control module
Determining server；
The power supply module is powered for entire redundancy switching system.
Preferably, the human-machine interface module is equipped with switch knob and status indicator lamp, and the switch knob is for selecting
Active and standby selection mode, the status indicator lamp are used to indicate system running state.
Preferably, the switch knob equipped with A is host, B is host and automatically selects three gears of host, the state
It is host indicator light, B is host indicator light that indicator light, which includes A systems Health LED, B systems Health LED, A,.
Preferably, the switching control module is equipped with A systems health status control device, B systems health status control device, A
Owner's machine behavior control device and B owner's machine behavior control device are respectively used to control A systems Health LED, the health instruction of B systems
It is the on and off of host indicator light that lamp, A, which are host indicator light, B,.
Preferably, the A systems health status control device judges whether A systems are healthy according to the A systems health status of input, such as
Fruit A systems health, A systems Health LED is bright, if A systems are unhealthy, A systems Health LED goes out.
Preferably, the B systems health status control device judges whether B systems are healthy according to the B systems health status of input, such as
Fruit B systems health, B systems Health LED is bright, if B systems are unhealthy, B systems Health LED goes out.
Preferably, A owner's machine behavior control device first determine whether switch knob gear be A be host gear or
Host gear is automatically selected, if being host gear in A, next judges whether A systems are healthy, if A systems health judges B again
Whether system is host, if B systems are host, it is the instruction that Host Status indicator light goes out to send out control A, if B systems are not main
Machine then show that A is the conclusion of host, and it is the bright instruction of Host Status indicator light to be simultaneously emitted by control A；If it is determined that switch knob
In the gear for automatically selecting host, it is determined that A is not host.
Preferably, B owner's machine behavior control device first determine whether switch knob gear be B be host gear or
Host gear is automatically selected, if being host gear in B, next judges whether B systems are healthy, if B systems health judges A again
Whether system is host, if A systems are host, it is the instruction that Host Status indicator light goes out to send out control B, if A systems are not main
Machine then show that B is the conclusion of host, and it is the bright instruction of Host Status indicator light to be simultaneously emitted by control B；If it is determined that switch knob
In the gear for automatically selecting host, it is determined that B is not host.
Preferably, external communication interface is switched to communication interface by the communication interface handover module when A systems are hosts
A to realize with the communication connection of server A, when B systems are hosts, external communication interface is switched to communication interface B thus
Realize the communication connection with server B.
Preferably, the power supply module is connected with main power source and stand-by power supply.
The present invention realizes the required data synchronization of redundancy and active-standby switch by system hardware circuit, and that brings is beneficial
Effect has：
1. switching control is realized by hardware circuit, switching time is short；
2. handoff functionality is complete directly, it is clear that the result is intuitive；
3. reducing software complexity, reduce development difficulty and the influence to system function itself
4. hardware circuit is reliable and stable, switching is smooth and reliable, reduces time-varying and uncertainty and risk that software exchange can be brought；
5. active and standby system's external interface is cut off when non-conduction by hardware, separates safely with system, ensure system not by failure
System influences.
Description of the drawings
The invention will be further described with reference to the accompanying drawings and detailed description：
Fig. 1 is redundancy switching system application environment schematic diagram；
Fig. 2 is redundancy switching system functional block diagram；
Fig. 3 is human-machine interface module schematic diagram；
Fig. 4 is A systems health status control logic figure；
Fig. 5 is B systems health status control logic figure；
Fig. 6 is A systems health status control logic figure；
Fig. 7 is A systems health status control logic figure；
Fig. 8 is communication interface handover module functional block diagram.
Specific implementation mode
The application environment of redundancy switching system is very wide, as shown in Figure 1, the present embodiment is cut for the active and standby of ATS servers
Example is changed to explain, altogether by ATS server As, ATS server Bs, redundancy switching system, external system, form, actually answering
There may be multiple systems to constitute with middle external system, here only by taking an external system as an example.Redundancy switching system mainly realizes 2
Partial function, server active-standby switch and communication interface active-standby switch, server active-standby switch refer to selection server A
Or server B is primary server, and communication interface active-standby switch refers to synchronizing the external of selection connection in active-standby switch
Signal of communication is ATS server As or ATS server Bs.
Redundancy switching system in the present invention is based on hardware redundancy technology, i.e. hardware redundancy switching system, refers to passing through to be
Hardware circuit of uniting realizes the required data synchronization of redundancy and active-standby switch.
As shown in Fig. 2, the redundancy switching system includes human-machine interface module, switching control module, communication interface switching mould
Block and power supply module, dotted portion function is actually contained in each module in wherein Fig. 2, such as control interface A and control interface B
It is integrated in switching control module, communication interface A, communication interface B, external communication interface are integrated in communication interface handover module
In.Wherein, control interface A and control interface B sends out switch-over control signal, communication interface A to server A and server B respectively
Carry out the transmission of signal of communication with server A and server B respectively with communication interface B.
The human-machine interface module indicates current active-standby switch state and active and standby clothes for selecting active-standby switch mode
The operating status of business device；
The switching control module is used to acquire the active-standby switch status information of human-machine interface module, and is connect by control
The control instruction and operating status of mouth acquisition server A and server B；The switching control module determines to take by switch logic
Business which of device A and server B are principal series server and which be standby is server, and result is passed through control interface
Server A and server B are fed back to, and communication interface switching is provided by communication interface handover module of switch logic determination result
Instruction, and by server is active and standby and operating status feeds back to human-machine interface module；
External communication interface is switched to by the communication interface handover module according to the control instruction of switching control module
Determining server；
The power supply module is powered for entire redundancy switching system, and specifically switching control module and communication interface switch mould
Block provides working power, and the power supply of power supply module comes from external ATS system power supplies.
Modules are described in detail below.
Human-machine interface module mainly selects standby machine and shows current system mode, is divided into switch knob and state instruction
Lamp two parts.
As shown in figure 3, switch knob is used for selecting active and standby selection mode, totally 3 grades, i.e. A is host, B is host and automatic
Select host.It is host gear to get to A when knob, then system default A is host, and B is standby host.It is host shelves to get to B when knob
Position, then system default B is host, and A is standby host.Got to when knob and automatically select host gear, then system according to A systems when powering on and
The startup time of B systems determines that who is host.System mode is divided into A systems health, and B systems health, A is host, and B is four kinds of shapes of host
State, A systems health refer to that normal operation does not have any failure, B systems health to refer to B systems system to current A systems system
Normal operation and no any failure, A are that host refers to that A machines are host in current running, and B owner's machine refers to
B machines are host in running at present.
Status indicator lamp is used to refer to the state of current system operation, and corresponding A system health, B systems health, A is host, and B is
It is host indicator light that it is host indicator light, B that four kinds of states of host, which are provided with A systems Health LED, B systems Health LED, A, is led to
Cross the instruction of the bright of status indicator lamp or carry out state of going out.
Switching control module is equipped with A systems health status control device, B systems health status control device, the Host Status control of A systems
Device processed and B owner's machine behavior control device, it is that host refers to be respectively used to control A systems Health LED, B systems Health LED, A
Show that lamp, B are the on and off of host indicator light.
A systems health status control device, B systems health status control device, A owner's machine behavior control device and B owner's machine
Behavior control device is hardware circuit, including logic circuit and relay, mainly complete by logic circuit and relay
At the control of system mode, this is the core of entire redundancy switching system, is respectively used to the health status control of A systems, the healthy shape of B systems
State control, the Host Status control of A systems and the Host Status control of B systems, state control result are strong by A systems Health LED, B systems respectively
Health indicator light, A are that host indicator light, B are that the on and off of host indicator light are indicated.
As shown in figure 4, A systems health status control logic is as follows：Server A inputs A systems health status information, the A systems
Health status control device judges whether A systems are healthy according to the A systems health status of input, if A systems are healthy, the health instruction of A systems
Lamp is bright, if A systems are unhealthy, A systems Health LED goes out.
As shown in figure 5, B systems health status control logic is as follows：Server B inputs B systems health status information, the B systems
Health status control device judges whether B systems are healthy according to the B systems health status of input, if B systems are healthy, the health instruction of B systems
Lamp is bright, if B systems are unhealthy, B systems Health LED goes out.
As shown in fig. 6, A owner's machine state control logic is as follows：A owner's machine behavior control device first determines whether to switch
It is host gear or to automatically select host gear that knob gear, which is in A, if being host gear in A, next judges A systems
Whether healthy, if A systems health judges whether B systems are host again, if B systems are host, it is that Host Status refers to send out control A
Show the instruction that lamp goes out, show that A is the conclusion of host if B systems are not hosts, it is Host Status indicator light to be simultaneously emitted by control A
Bright instruction；If it is determined that switch knob is in the gear for automatically selecting host, it is determined that A is not host.
As shown in fig. 7, B owner's machine state control logic is as follows：B owner's machine behavior control device first determines whether to switch
It is host gear or to automatically select host gear that knob gear, which is in B, if being host gear in B, next judges B systems
Whether healthy, if B systems health judges whether A systems are host again, if A systems are host, it is that Host Status refers to send out control B
Show the instruction that lamp goes out, show that B is the conclusion of host if A systems are not hosts, it is Host Status indicator light to be simultaneously emitted by control B
Bright instruction；If it is determined that switch knob is in the gear for automatically selecting host, it is determined that B is not host.
Communication interface modules completes the channel selecting of correspondence with foreign country signal according to the order of switching control module, such as Fig. 8 institutes
Show, A/B systems switching circuit turn-on condition is provided by switching control module, according to signal type selective relay or optocoupler etc. every
From switching circuit, ensure in the case where certain is fault condition, does not have circuit and failure end signal is conducted to external interface or another
System even exports non-secure states so as to cause system operation failure.
The module realizes that function mainly divides following three kinds of situations：
If A is host, by correspondence with foreign country signal conduction to A systems communication interface, server A will administer correspondence with foreign country work(
Can, the external communication interface function cut-out of B systems.
If B is host, by correspondence with foreign country signal conduction to B systems communication interface, server B will administer correspondence with foreign country work(
Can, the external communication interface function cut-out of A systems.
If A and B are not hosts, A/B correspondence with foreign country functions are cut off simultaneously.
What power supply module was used for powering to hardware redundancy switching system, in order to ensure the redundancy of whole system, power supply unit
It also must be redundancy to divide, and the power supply of power module comes with the power supply of external server as power supply, is independent two-way ATS
Power supply, either which road power supply disconnect, and it is server handoff functionality that only can break down corresponding one, and another system still can be normal
Work, becomes host or correspondence with foreign country.
In addition, the redundancy switching system of the present invention mainly applies to ATS control systems, but can also apply in similar frame
In the systems such as master-slave redundancy, the two-node cluster hot backup of structure, including interlock control system, vehicle control syetem and redundant server etc.
Deng.
Claims (3)
1. a kind of redundancy switching system, for the active-standby switch between server A and server B, it is characterised in that：The redundancy is cut
The system of changing includes human-machine interface module, switching control module, communication interface handover module and power supply module；
The human-machine interface module indicates current active-standby switch state and active/standby server for selecting active-standby switch mode
Operating status；
The switching control module is used to acquire the active-standby switch state of human-machine interface module, and is acquired and taken by control interface
The control instruction and operating status of business device A and server B；The switching control module by switch logic determine server A and
In server B who be principal series server and who be standby be server, and result is fed back into server A kimonos by control interface
Be engaged in device B, and provides communication interface switching command using switch logic determination result as communication interface handover module, and by server master
Standby and operating status feeds back to human-machine interface module；
The communication interface handover module switches external communication interface according to the communication interface switching command of switching control module
To fixed principal series server；
The power supply module is powered for entire redundancy switching system；
The human-machine interface module is equipped with switch knob and status indicator lamp, and the switch knob is for selecting active and standby selecting party
Formula, the status indicator lamp are used to indicate system running state, and the switch knob equipped with server A is host, server B is
Host and automatically select three gears of host, the status indicator lamp includes that server A Health LED, server B health refer to
Show that lamp, server A are host indicator lights and server B is host indicator light, the switching control module is run equipped with server A
Behavior control device, server B operating status control device, server A Host Status control device and server B Host Status
Control device, be respectively used to control server A Health LED, server B Health LED, server A be host indicator light,
Server B is the on and off of host indicator light, and the server A operating status control device is run according to the server A of input
Whether condition adjudgement server A is healthy, if server A is healthy, server A Health LED is bright, if server A is not good for
Health, server A Health LED go out, and the server B operating status control device is sentenced according to the server B operating status of input
Whether disconnected server B is healthy, if server B is healthy, server B Health LED is bright, if server B is unhealthy, service
Device B Health LEDs go out, and the server A Host Status control device first determines whether that switch knob gear is to be in server A
Host gear still automatically selects host gear, if being host gear in server A, next whether judges server A
Health, if server B is host, sends out control service if server A health judges whether server B is host again
Device A is the instruction that host indicator light goes out, and show that server A is the conclusion of host if server B is not host, is simultaneously emitted by
It is the bright instruction of host indicator light to control server A；If it is determined that switch knob is in the gear for automatically selecting host, it is determined that
Server A is not host, and the server B Host Status control device first determines whether that switch knob gear is to be in server B
Host gear still automatically selects host gear, if being host gear in server B, next whether judges server B
Health, if server A is host, sends out control service if server B health judges whether server A is host again
Device B is the instruction that host indicator light goes out, and show that server B is the conclusion of host if server A is not host, is simultaneously emitted by
It is the bright instruction of host indicator light to control server B；If it is determined that switch knob is in the gear for automatically selecting host, it is determined that
Server B is not host.
2. redundancy switching system according to claim 1, it is characterised in that：The communication interface handover module is in server
When A is host, external communication interface is switched to communication interface A to realize the communication connection with server A, in server B
When being host, external communication interface is switched to communication interface B to realize the communication connection with server B.
3. redundancy switching system according to claim 1, it is characterised in that：The power supply module is connected with main power source and standby
Use power supply.
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| CN201510595037.8A CN105187248B (en) | 2015-09-16 | 2015-09-16 | A kind of redundancy switching system |
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