CN100530996C - System and method for realizing veneer active/standby changeover in communication equipment - Google Patents
System and method for realizing veneer active/standby changeover in communication equipment Download PDFInfo
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- CN100530996C CN100530996C CNB2004100554583A CN200410055458A CN100530996C CN 100530996 C CN100530996 C CN 100530996C CN B2004100554583 A CNB2004100554583 A CN B2004100554583A CN 200410055458 A CN200410055458 A CN 200410055458A CN 100530996 C CN100530996 C CN 100530996C
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Abstract
Disclosed is a device and method for switching between primary and secondary in communication system. On each main control board and business board are equipped with crossing switch; the pair of signal input and output of the crossing switch on main control board are connected with processing module, other pairs of signal input and output are separately connected with the signal input and output of crossing switch on each business board; signal input and output of crossing switch on each business board are connected with business module, other signal input and output are separately connected with the input and output of crossing switches on each main control board. The main control board and business board send primary and secondary indicating signals to each other, according to the received signals, inputting control signal to the controlling signal input of crossing switch to control the switch of primary and secondary devices.
Description
Technical field
The present invention relates to communication technical field, relate in particular to the system and method for realizing single-board host-slave switching in a kind of communication equipment.
Background technology
Communication equipment is a physical entity of finishing specific function in communication network, in communication network, in order to guarantee the continuity of network work, require the non-stop run in 24 hours of some equipment, therefore the critical component to equipment carries out redundant double copies design, makes it can support activestandby hot backup work, when guaranteeing that the master is broken down with parts, can smoothly be switched to spare unit, can not cause professional interruption.Simultaneously, when the structure of network, the integrated function of single equipment needs to realize that by different level the veneer of difference in functionality module is except supporting the active and standby state of using respectively that also needing works in coordination finishes active and standby work.
Be in main parts at work and be called the main parts of using with state, the parts that are in stand-by state are called spare unit, by realizing the main work that backups each other with parts and spare unit, when making the master use unit failure, equipment automatically switches to spare unit, guarantee professional not interrupting, main mutual switching with parts and spare unit is called masterslave switchover.In the communication equipment, business board is a veneer of finishing concrete service processing function, comprises functions such as protocol processes and user management.Master control borad is in the core of system handles in communication equipment, finish capital equipment management and the function of communicating by letter.Master control borad and business board can be operated in the active and standby state of using, and support the masterslave switchover characteristic.
In the prior art scheme, employing master control borad that has and business board be masterslave switchover respectively, be illustrated in figure 1 as prior art master control borad and business board masterslave switchover structural principle schematic diagram respectively, processing module in the master control borad and the business module in the business board are by two business interface interconnection, interface adopts Gigabit Ethernet serial line interface (GE Serdes) signal, can adopt the interconnection of low-voltage positive emitter coupling logic (LVPECL) level, also can adopt the interconnection of Low Voltage Differential Signal (LVDS) level.Active and standby each other part between the master control borad, during the main control board fault, slave control board can rise to main usefulness, and the fault master control borad is reduced to stand-by state.Active and standby each other part between the business board, during working traffic plate fault, standby business board can rise to main usefulness, and the fault business board is reduced to stand-by state.
Situation one: suppose that master control borad A master uses, business board C master uses, at this moment the passage of main control board and working traffic plate is interface A, when main control board A fault, master control borad can be switched to slave control board B, at this moment the service channel between working traffic plate C and the master control borad B is interface C, for master control borad B, service channel does not change, but variation has taken place in the service channel of business board C, become interface C, at this moment the service channel of business board C will correspondingly switch to interface C, otherwise the business of main control board B and working traffic plate C will be interrupted.
Situation two: suppose that business board C master uses, master control borad A master uses, at this moment the passage of working traffic plate and main control board is interface A, when business board C fault, business board can be switched to business board D, at this moment the service channel between the business board D of the systematic master control board A of main usefulness and main usefulness is B, for business board D, service channel does not change, but variation has taken place in the service channel of master control borad A, become interface B, at this moment the service channel of master control borad A will correspondingly switch to interface B, otherwise the business between main control board A and the working traffic plate D will be interrupted.
The major defect of above-mentioned prior art scheme has:
Though 1, master control borad and business board are all supported masterslave switchover, switching of a side can cause interior processing module of master control borad and the business interface between the business module in the business board to change, and correspondingly wants the service switchover interface, causes business that interruption is arranged.
2, from the angle of reliability, no matter being switching of master control borad or business board, is not fully independently, and certain relevance is arranged each other.In other words, the interface sequence number that can cause between interior processing module of master control borad and the business board business module of switching of business board changes, thereby causes the destination interface of the processing module forwarding-table item in the master control borad that variation has taken place; Simultaneously, switching of master control borad can cause the passage of the business module in the business board to change, thereby causes the list item relevant with business interface all will be gone to upgrade by software.Therefore the fault of master control borad or business board all can exert an influence to the operating state of corresponding business plate or master control borad
3, the difficulty that realizes increases because either party switch the switching that all can cause the functional area, cause having a large amount of list items relevant to refresh with interface, bring very big difficulty to the realization of software, complicated service plate especially, the difficulty of realization can be bigger.For example: master control borad A and business board C master use, at this moment the service transmission channels of master control borad A and business board C is interface A, if business board C disturbance switching is to business board D, at this moment master control borad A still leads the state of using, the service transmission channels of business board D just switches to interface B, originally the up business setting of master control borad A is bundled on the interface A, at this moment because the switching the business interface that causes master control borad A and must switch to interface B of business board, so all settings that are tied to interface A all must reconfigure to interface B originally, the purpose interface that can cause master control borad A to go up a large amount of forwarding-table items like this switches, need the software intervention, can bring the reduction of the difficulty and the reliability of realization.
4, will transmit active and standby index signal mutually by agreement between master control borad and the business board, switch simultaneously and relate to professional switching of transmitting destination interface, software will upgrade a large amount of list items, so the speed of switching is slower.
5, taken 2 GE business interfaces, only used 1 GE business interface during real work, bandwidth waste half.
In order to overcome some shortcoming of technique scheme, prior art has proposed another scheme, master control borad and business board are formed a correlation module, both operating states link together, any single board default, the module that the capital causes these two veneers to be formed is switched, and the switching of constituting that interact between master control borad and the business board is called linking switching like this.Be illustrated in figure 2 as master control borad and business board linking switching structural principle schematic diagram, by a business interface interconnection, support masterslave switchover between the master control borad, and business board do not supported masterslave switchover between processing module in the master control borad and the business module in the business board.Bind together between master control borad and the business board, pass through protocol communication between the two.
Situation one: suppose master control borad A master usefulness, at this moment the passage of main control board and working traffic plate is interface A, and professional interface by business board C is up, shakes hands with to keep stable working state consistent by communication protocol between master control borad A and the business board C.When main control board A fault, master control borad can be switched to slave control board B, at this moment the communication disruption between master control borad A and the business board C, and the communication between main control board B and the service processing board D begins operate as normal, at this moment service channel switches to master control borad B and service processing board D.
Situation two: suppose master control borad A master usefulness, at this moment the passage of main control board and working traffic plate is interface A, and professional interface by business board C is up, shakes hands with to keep stable working state consistent by communication protocol between master control borad A and the business board C.When business board C fault, at this moment the communication disruption between master control borad A and the business board C, at this moment master control borad A thinks and the system failure therefore is switched to slave control board B, and the communication between master control borad B and the business board D begins operate as normal, and at this moment service channel switches to master control borad B and business board D.
But there is following defective in this technical scheme:
1, business board is not supported masterslave switchover, causes the dynamic data of working traffic plate can't backup to standby business board, and when business board switched like this, original user's business will be interrupted, and need apply for again, could recover professional.
2, master control borad and business board close-coupled, either party can cause linking switching at fault, so the fault of master control borad or business board all can exert an influence to the operating state of corresponding business plate or master control borad.
3, the state close-coupled of the fault of link and operation influences the stability of system.The up link of business board breaks down, at this moment business has been broken, business board detects the business interface link failure, can be by notice of settlement master control borad business board faulty link, switch, though at this moment master control borad does not have fault, because the uplink failure of business board will cause master control board switching.So the reliability of system is subjected to the influence of business board up link.
4, switch to rely between master control borad and the business board and move agreement, business board and master control borad can make the speed of switching be affected mutually by protocol negotiation like this before switching.If master control borad
CPU is just handling an interrupt routine, must handle this interrupt routine and could handle turning protocol.
Summary of the invention
Technical problem to be solved by this invention is: when overcoming existing communication equipment and carrying out masterslave switchover, service disconnection, poor reliability, the realization difficulty, the speed of switching that occur wait defective slowly, a kind of system and method for realizing masterslave switchover is provided, reduce influence, and improve the reliability of communication equipment and switch speed business.
The present invention solves the problems of the technologies described above the technical scheme that is adopted to be:
Realize the method for single-board host-slave switching in this communication equipment, described veneer comprises master control borad and business board, this master control borad comprises processing module, business board comprises business module, in each master control borad of communication equipment and business board, cross bar switch is set respectively, the a pair of signal input output end of cross bar switch is connected with described processing module in each master control borad, remaining some to signal input output end respectively with the corresponding connection of a pair of signal input output end of cross bar switch in each business board; The a pair of signal input output end of cross bar switch is connected with business module in each business board, remaining some to signal input output end respectively with the corresponding connection of a pair of signal input output end of cross bar switch in each master control borad, this method may further comprise the steps: master control borad sends the first active and standby index signal to each business board respectively, and each business board sends the second active and standby index signal to each master control borad respectively simultaneously; Master control borad and business board are according to the first or second active and standby index signal of receiving separately, and in cross bar switch signal input end input control signal corresponding separately, the control cross bar switch switches, and realizes the masterslave switchover of master control borad or business board.
Can in master control borad and business board, programmable logic device be set, receive from the second active and standby index signal on each business board by the programmable logic device on the master control borad, import the signal input end of cross bar switch on the described master control borad after treatment, the switching of cross bar switch on the control master control borad; Receive from the first active and standby index signal on each master control borad by the programmable logic device on the described business board, import the signal input end of cross bar switch on the described business board after treatment, the switching of cross bar switch on the control business board.
Master control borad can adopt two, and active and standby each other part, business board can adopt two, active and standby each other part.Cross bar switch can adopt 4 * 4 road electronics cross bar switches.
Realize the system of single-board host-slave switching in corresponding a kind of communication equipment, comprise master control borad and business board, this master control borad comprises processing module, business board comprises business module, in each master control borad of communication equipment and business board, be respectively equipped with cross bar switch, the a pair of signal input output end of cross bar switch is connected with described processing module in each master control borad, remaining some to signal input output end respectively with the corresponding connection of a pair of signal input output end of cross bar switch in each business board; The a pair of signal input output end of cross bar switch is connected with business module in each business board, remaining some to signal input output end respectively with the corresponding connection of a pair of signal input output end of cross bar switch in each master control borad;
In master control borad and business board, also be provided with programmable logic device, be connected with the processing module of master control borad and the business module of business board respectively, receive the first or second active and standby index signal; The signal input end of cross bar switch is connected on programmable logic device on the master control borad and the master control borad, and be connected with programmable logic device on each business board, reception is from the second active and standby index signal on each business board, handle the signal input end of cross bar switch on the described master control borad of back input, the switching of cross bar switch on the control master control borad, the masterslave switchover of realization master control borad; The signal input end of cross bar switch is connected on programmable logic device on the business board and the business board, and be connected with programmable logic device on each master control borad, reception is from the first active and standby index signal on each master control borad, handle the signal input end of cross bar switch on the described business board of back input, the switching of cross bar switch on the control business board, the masterslave switchover of realization business board.Master control borad and business board can respectively adopt two, and cross bar switch can adopt 4 * 4 road electronics cross bar switches.
Beneficial effect of the present invention is: master control borad of the present invention and business board send active and standby index signal mutually, inform the other side's operating state, adopt cross bar switch to realize that switch the physical channel and the isolation of concrete operating state, the switching of physical channel realizes automatically by hardware circuit, do not need software to participate in, realized that really intelligence switches.Concrete advantage is as follows:
1, the present invention is with professional physical channel and master control borad and the concrete operating state isolation of business board, and the state of link does not influence the operating state of veneer.The upstream Interface link failure of working as the working traffic plate in other words, at this moment the working traffic plate detects link failure, can auto switching arrive standby business board, and the programmable logic device of main control board meeting at this moment detects the active and standby index signal of business board automatically, can carry out the switching of electronics cross bar switch according to active and standby index signal, not carry out switching of master control borad.Thus, the link failure of any business board, influence only be the operating state of business board, can not influence the operating state of master control borad, main control board just carries out the switching of cross bar switch, thereby has improved the stability of whole system.
2, the operating state of master control borad and business board is isolated, carry out masterslave switchover respectively, either party switches switching of the operating state that can not influence the other side; Because the business of master control borad and business board shields by cross bar switch, processing module to master control borad, it can't see the channel status with business board, it only sees the output GE interface of its processing module, business module for business board is the same equally, and the stability of a system is improved.
3, the switching of professional physical channel realizes by hardware circuit, and the speed of switching is very fast, below 1 millisecond, really accomplishes the minimum that influences to business; Go to detect active and standby index signal by hardware logic, go to export control signal the electronics cross bar switch according to the high-low level of signal, the annexation of the input and output of control cross bar switch, thus can switch switching of the system of realization by switch.
4, to not influence of software, the reliability of whole system is very high.In whole reversed process, all be to remove detection signal between master control borad and the business board, again according to the signal output control signal that detects by hardware, so all be that hardware carries out automatically, do not have the participation of software, the reliability of system is higher, and realizes also very convenient.
Description of drawings
Fig. 1 is existing master control borad and business board difference masterslave switchover structural principle schematic diagram;
Fig. 2 is existing master control borad and business board linking switching structural principle schematic diagram;
Fig. 3 is a masterslave switchover structural principle schematic diagram of the present invention;
Fig. 4 is a cross bar switch operation principle schematic diagram;
Fig. 5 is a cross bar switch connection diagram in the master control borad A.
Embodiment
With embodiment the present invention is described in further detail with reference to the accompanying drawings below:
For overcoming the defective of prior art, the present invention proposes a kind of implementation method and system of intelligent masterslave switchover, in each master control borad of communication equipment and business board, cross bar switch is set respectively, master control borad sends active and standby index signal to each business board respectively, and each business board sends active and standby index signal to each master control borad respectively simultaneously; Master control borad and business board are according to the active and standby index signal of receiving separately, and in cross bar switch signal input end input control signal corresponding separately, the control cross bar switch switches, and realizes the masterslave switchover of master control borad or business board.
As shown in Figure 3, master control borad is two, active and standby each other part of master control borad A and master control borad B; Business board is two, active and standby each other part of business board C and business board D.On master control borad and business board, increase by 4 * 4 tunnel electronics cross bar switch and programmable logic device (CPLD).
Be illustrated in figure 4 as cross bar switch operation principle schematic diagram, cross bar switch is a kind of device of realizing signal cross, can realize any one tunnel input and any one tunnel output interconnection by control signal, 4 * 4 road electronics cross bar switches are 4 pairs of input differential signal (1A+ and 1A-, 2A+ and 2A-, 3A+ and 3A-, 4A+ and 4A-) and 4 pairs of output differential signals (1B+ and 1B-, 2B+ and 2B-, 3B+ and 3B-, 4B+ and 4B-), control signal is 2 Transistor-Transistor Logic level signals (C1/C2), realizes signal cross by cross matrix.
As Fig. 3 and shown in Figure 5, a pair of signal input output end of cross bar switch is connected with processing module in the master control borad A, remaining 2 pairs of signal input output end respectively with business board C and business board D in corresponding connection of a pair of signal input output end of cross bar switch; Equally, a pair of signal input output end of cross bar switch is connected with processing module in the master control borad B, remaining 2 pairs of signal input output end respectively with business board C and business board D in corresponding connection of a pair of signal input output end of cross bar switch.The a pair of signal input output end of cross bar switch is connected with business module in the business board C, and is same, and a pair of signal input output end of cross bar switch is connected with business module in the business board D.Between cross bar switch and processing module or the business module, and the interface between the cross bar switch all adopts Gigabit Ethernet serial line interface (GE Serdes) signal, can adopt the interconnection of low-voltage positive emitter coupling logic (LVPECL) level, also can adopt the interconnection of Low Voltage Differential Signal (LVDS) level.
In master control borad and business board, also be provided with programmable logic device (CPLD), be connected with the processing module of master control borad and the business module of business board respectively, receive active and standby index signal; The signal input end of cross bar switch is connected on programmable logic device on the master control borad and the master control borad, and be connected with programmable logic device on each business board, reception is from the active and standby index signal on each business board, handle the signal input end of cross bar switch on the described master control borad of back input, the switching of cross bar switch on the control master control borad, the masterslave switchover of realization master control borad; The signal input end of cross bar switch is connected on programmable logic device on the business board and the business board, and be connected with programmable logic device on each master control borad, reception is from the active and standby index signal on each master control borad, handle the signal input end of cross bar switch on the described business board of back input, the switching of cross bar switch on the control business board, the masterslave switchover of realization business board.
As shown in Figure 5, the switching of the cross bar switch on the master control borad A realizes the switching of interface by the active and standby index signal that detects business board C, go to detect active and standby index signal by the CPLD logic, if active and standby index signal is a high level, the GE signal of then master control borad A being gone up the cross bar switch left side switches to interface A; If detecting active and standby index signal is low level, then the GE signal with the left side switches to interface B.So just realized no matter how active and standby index signal changes, and the GE signal on the left side remains unchanged, and two groups of GE signals on the right can be realized switching according to the state of active and standby signal.Therefore the business module of the processing module of master control borad and business board is only seen the GE interface with its interface, and can't see the interface A and the interface B of both interconnection.
Concrete working condition is described below:
Situation one: during operate as normal, suppose master control borad A and business board C master usefulness, at this moment master control borad A send the master to arrive business board C and business board D with signal; Business board C send the master to arrive master control borad A and master control borad B with signal simultaneously.Master control borad A and B are active and standby each other, and business board C and D are active and standby each other.
Situation two: when master control borad A fault, master control borad is switched, master control borad B is upgraded to main using, at this moment master control borad A gives the active and standby invalidating signal of business board, business board C control electronics cross bar switch switches to service channel C, the switching of the data channel of business board C is to determine by the active and standby index signal that detection master control borad A sends here, the control signal of cross bar switch is set according to active and standby index signal, any can determine road input signal and output signal interconnection, this is to detect and realize by hardware logic, do not need the participation of software, so can be higher aspect speed and reliability.Be upgraded to the master control borad B of main usefulness and the business board C of main usefulness and carry out the transmitting-receiving of data by interface C.
Situation three: when business board C fault, business board is switched, business board D is upgraded to main using, at this moment business board C gives the active and standby invalidating signal of master control borad, master control borad A control electronics cross bar switch switches to service channel B, the switching of the data channel of master control borad A is to be undertaken by the active and standby index signal that detection business board C sends here, the active and standby index signal of sending here according to business board C is provided with the control signal of cross bar switch, any can determine road input signal and output signal interconnection, this is to detect and realize by hardware logic, do not need the participation of software, so can be higher aspect speed and reliability.The master control borad A of main usefulness and the business board D of main usefulness carry out the transmitting-receiving of data by interface B.
Master control borad of the present invention and business board send active and standby index signal mutually, inform the other side's operating state, adopt cross bar switch to realize that switch the physical channel and the isolation of concrete operating state, the switching of physical channel realizes automatically by hardware circuit, do not need software to participate in, a kind of implementation method of the intelligent masterslave switchover that can conveniently realize is provided, little to service impact, and improved the reliability of communication equipment and switched speed, realized that really intelligence switches.
When carrying out masterslave switchover, can export to the index signal of cross bar switch by CPLD control, carry out independently switching, also can control master control borad and business board is switched simultaneously, i.e. linking switching.Those skilled in the art do not break away from essence of the present invention and spirit, can there be the various deformation scheme to realize the present invention, the above only is the preferable feasible embodiment of the present invention, be not so limit to interest field of the present invention, the equivalent structure that all utilizations specification of the present invention and accompanying drawing content are done changes, and all is contained within the interest field of the present invention.
Claims (7)
1, realizes the method for single-board host-slave switching in a kind of communication equipment, described veneer comprises master control borad and business board, this master control borad comprises processing module, business board comprises business module, it is characterized in that: in each master control borad of communication equipment and business board, cross bar switch is set respectively, the a pair of signal input output end of cross bar switch is connected with described processing module in each master control borad, remaining some to signal input output end respectively with the corresponding connection of a pair of signal input output end of cross bar switch in each business board; The a pair of signal input output end of cross bar switch is connected with business module in each business board, remaining some to signal input output end respectively with the corresponding connection of a pair of signal input output end of cross bar switch in each master control borad, this method may further comprise the steps:
Master control borad sends the first active and standby index signal to each business board respectively, and each business board sends the second active and standby index signal to each master control borad respectively simultaneously;
Master control borad and business board are according to the first or second active and standby index signal of receiving separately, and in cross bar switch signal input end input control signal corresponding separately, the control cross bar switch switches, and realizes the masterslave switchover of master control borad or business board.
2, realize the method for single-board host-slave switching in the communication equipment according to claim 1, it is characterized in that: in master control borad and business board, be provided with programmable logic device, receive from the second active and standby index signal on each business board by the programmable logic device on the master control borad, import the signal input end of cross bar switch on the described master control borad after treatment, the switching of cross bar switch on the control master control borad; Receive from the first active and standby index signal on each master control borad by the programmable logic device on the described business board, import the signal input end of cross bar switch on the described business board after treatment, the switching of cross bar switch on the control business board.
3, realize the method for single-board host-slave switching in the communication equipment according to claim 1 and 2, it is characterized in that: described master control borad is two, active and standby each other part; Described business board is two, active and standby each other part.
4, realize the method for single-board host-slave switching in the communication equipment according to claim 3, it is characterized in that: described cross bar switch is 4 * 4 road electronics cross bar switches.
5, realize the system of single-board host-slave switching in a kind of communication equipment, comprise master control borad and business board, this master control borad comprises processing module, and business board comprises business module, it is characterized in that:
In each master control borad of communication equipment and business board, be respectively equipped with cross bar switch, the a pair of signal input output end of cross bar switch is connected with described processing module in each master control borad, remaining some to signal input output end respectively with the corresponding connection of a pair of signal input output end of cross bar switch in each business board; The a pair of signal input output end of cross bar switch is connected with business module in each business board, remaining some to signal input output end respectively with the corresponding connection of a pair of signal input output end of cross bar switch in each master control borad;
In master control borad and business board, also be provided with programmable logic device, be connected with the processing module of master control borad and the business module of business board respectively, receive the first or second active and standby index signal; The signal input end of cross bar switch is connected on programmable logic device on the master control borad and the master control borad, and be connected with programmable logic device on each business board, reception is from the second active and standby index signal on each business board, handle the signal input end of cross bar switch on the described master control borad of back input, the switching of cross bar switch on the control master control borad, the masterslave switchover of realization master control borad; The signal input end of cross bar switch is connected on programmable logic device on the business board and the business board, and be connected with programmable logic device on each master control borad, reception is from the first active and standby index signal on each master control borad, handle the signal input end of cross bar switch on the described business board of back input, the switching of cross bar switch on the control business board, the masterslave switchover of realization business board.
6, realize the system of single-board host-slave switching in the communication equipment according to claim 5, it is characterized in that: described master control borad and business board respectively are two.
7, realize the system of single-board host-slave switching in the communication equipment according to claim 6, it is characterized in that: described cross bar switch is 4 * 4 road electronics cross bar switches.
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| CN1731696A (en) | 2006-02-08 |
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