CN101026426B - Tributary interface device and method for protecting slot flexible configuration - Google Patents
Tributary interface device and method for protecting slot flexible configuration Download PDFInfo
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- CN101026426B CN101026426B CN2007100008164A CN200710000816A CN101026426B CN 101026426 B CN101026426 B CN 101026426B CN 2007100008164 A CN2007100008164 A CN 2007100008164A CN 200710000816 A CN200710000816 A CN 200710000816A CN 101026426 B CN101026426 B CN 101026426B
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Abstract
The branch interface equipment includes following units: (1) n pieces of connection unit in use for outputting the input signal from line to corresponding branch unit through tri-state gate selector; also tri-state gate selector can uses signal from branch unit as line output signal; moreover, able to carry out protection switching for protected branch unit; (2) protective connection unit in use for switching into conduction between input/output bus and protected branch unit; (3) protected branch unit connected to the cross connection unit is in use for transferring traffic signal after branch unit is in fault; (4) cross connection unit switches traffic signal to the protected branch unit based on fault signal alarming sent from each branch unit according to priority setup by monitoring unit. Features are: flexible system configuration, and easy reformation for enlarging capacity.
Description
Technical field
The present invention relates to the method for a kind of tributary interface device among the SDH (Synchronous Digital Hierarchy) SDH and the configuration of protection slot flexible.
Background technology
In the SDH system, the electric tributary interface of multiple speed (has 2Mb/s, 34Mb/s, a 45Mb/s as commonly used, the SDH tributary interface of the tributary interface of PDH such as 140Mb/s and 155Mb/s) all shines upon/separate in the frame signal that is mapped to SDH, by the optical link transmission of SDH with specific format.In the SDH system design that realizes these interfaces, often need tributary interface is decomposed into linkage unit (perhaps being called " terminal board ") and tributary unit (perhaps being called " interface disc ").Based on consideration, often need the tributary unit of key is designed to the 1:n protection to service reliability.Traditional method for designing is the groove position of fixedly protected location, so, the protection of corresponding a kind of interface type, as protection of 2Mb/s interface unit or the protection of 34Mb/s interface unit etc., all need to distribute the groove position of a fixing protected location, dispose the hardware protection of the corresponding interface if desired, this groove position must be reserved in advance; The networking initial stage; because the uncertainty of user's request; also not too clear and definite which service needed hardware protection; just have no way of also determining which class interface unit needs the configure hardware protection; in the configuration of professional groove position, very likely can take the groove position of protected location; in case when the user needs protection, will inevitably cause the groove position to redistribute interrupting service.
At first; protection for the tributary interface unit; interface rate height no matter; general adopt as shown in Figure 1 a bit to multipoint system: under the normal operation; the line interface business that links to each other with linkage unit 1 (generally introducing by the coaxial cable of 75 Ω) inserts cross-connection unit by tributary unit 1; the line interface that links to each other with linkage unit n is professional to insert cross-connection unit by tributary unit n, and protection linkage unit and protection tributary unit are in idle condition.
In case certain tributary unit r (1≤r≤n) lost efficacy, and the linkage unit r and the cross-connection unit of interface move simultaneously with it, with the line interface switching services on protection linkage unit and protection tributary unit.
From the angle of protection implementation, this mode is directly perceived, and is simple and clear.But there is following several drawback at least in it:
(1) fixed-site of protection linkage unit and protection tributary unit, the topological structure in system can't change.This defective just shows when carrying out dilatation in system.User's demand is constantly to change, in case the position of protection linkage unit and protection tributary unit is occupied in the engineering opening in early stage, need interrupt original business when increasing the defencive function of tributary unit again;
(2) adopt any to the multiple spot design, the value of n is restricted.Can imagine; in case n obtains big (such as n=5); input/output signal and protection Attachment Unit Interface that n linkage unit must be arranged; increased the PCB layout difficulty of backboard on the one hand; increased the design complexities of protection linkage unit simultaneously; particularly for the line interface of higher rate, these restraining factors show quite obviously.
Secondly, for the protection of the interface unit of low rate, also have and adopt bus mode, signal is as Fig. 2:
This structure has reduced the kind (having saved the protection linkage unit) of linkage unit, directly will protect bus and protected location to couple together on backboard, and mechanism and mode shown in Figure 1 that protection is switched are basic identical.But, also there is following defective:
(1) asymmetric in the design, though reduced the protection linkage unit on the veneer kind, in the occasion that does not need to coil protection, the groove position of protection tributary unit can't be professional up and down, and system's words ability up and down reduces;
(2) fixed-site of protection linkage unit and protection tributary unit, protection groove position can't be changed, and has the defective similar to Fig. 1.
Summary of the invention
The object of the present invention is to provide a kind of tributary interface device and a kind of method of protecting the slot flexible configuration.
Tributary interface device among a kind of SDH (Synchronous Digital Hierarchy) SDH provided by the invention, it comprises: n linkage unit, be used for line input signal being exported to corresponding tributary unit respectively, can also output on the public input bus by the triple gate selector by the triple gate selector; Simultaneously, the signal that is used for by the triple gate selector tributary unit being come is as line output signal, can also select signal on the public output bus as line output signal by the triple gate selector; Wherein three-state control signal is controlled the conducting of the triple gate of each linkage unit from cross-connection unit; The protection linkage unit is used for input/output bus and the conducting of protection tributary unit; The protection tributary unit is connected with cross-connection unit, the service signal of the tributary unit after being used for misfeed after the tributary unit inefficacy; Cross-connection unit according to the dish disablement signal alarm that each tributary unit is sent here, is controlled the generation of switching according to the priority level of monitoring unit setting; When cross-connection unit decision generation protection is switched, by the line output signal of the signal on the public output bus of triple gate selector selection as the inefficacy linkage unit; The linkage unit that lost efficacy is used for will outputing to public input bus from the signal of line interface input by the triple gate selector, as the input signal of the tributary unit of protecting; Be provided with one the tunnel and be protection linkage unit and protection tributary unit; other is configured to the linkage unit and the tributary unit of work; when not needing the tributary unit protection; the protection linkage unit is replaced by the linkage unit of work; cross-connection unit is according to the malfunction situation of each branch road, and whether the release of decision triple gate, and synchronization is only allowed the triple gate that discharges on the linkage unit; when not needing protection, close with all triple gates of protection bus interface.
The method of the protection slot flexible configuration among a kind of SDH (Synchronous Digital Hierarchy) SDH provided by the invention, it comprises that step (1) linkage unit is used for by the triple gate selector line input signal being exported to corresponding tributary unit respectively, can also output on the public input bus by the triple gate selector; Simultaneously, the signal that is used for by the triple gate selector tributary unit being come is as line output signal, can also select signal on the public output bus as line output signal by the triple gate selector; Wherein three-state control signal is controlled the conducting of the triple gate of each linkage unit from cross-connection unit; Step (2) protection linkage unit is with input/output bus and the conducting of protection tributary unit; The service signal of the tributary unit step (3) protection tributary unit is used for misfeed after tributary unit lost efficacy after; The dish disablement signal that step (4) cross-connection unit is sent here according to each tributary unit is alarmed and the situation that is provided with of protection priority level starts corresponding control signal; Step (5) is controlled triple gate selector according to this control signal so that finish inefficacy tributary unit switching to the protection tributary unit, switch the line interface and the input/output bus conducting that comprise the linkage unit that will break down, described conducting is meant by the line output signal of the signal on the public output bus of triple gate selector selection as the inefficacy linkage unit; The linkage unit that lost efficacy is used for will outputing to public input bus from the signal of line interface input by the triple gate selector, as the input signal of the tributary unit of protecting; Step (6) is provided with one the tunnel and is protection linkage unit and protection tributary unit; other is configured to the linkage unit and the tributary unit of work; when not needing the tributary unit protection; the protection linkage unit is replaced by the linkage unit of work; cross-connection unit is according to the malfunction situation of each branch road, and whether the release of decision triple gate, and synchronization is only allowed the triple gate that discharges on the linkage unit; when not needing protection, close with all triple gates of protection bus interface.
The present invention is applicable to the protection occasion of low rate electrical tributary interface units, as 2Mb/s, and 34Mb/s, the protection of the tributary unit of PDH such as 45Mb/s makes system configuration flexible, is easy to extending capacity reformation.The present invention has same reference function to the 1:n hardware protection design of other applications.
Description of drawings
Fig. 1 is a circuit diagram of by some multipoint system being realized tributary unit 1:n protection in the background technology;
Fig. 2 is a circuit diagram of realizing tributary unit 1:n protection in the background technology by internal bus;
Fig. 3 is the circuit diagram according to the tributary interface device of the embodiment of the invention.
Embodiment
According to Fig. 3 one embodiment of the present of invention are described below, as shown in Figure 3, it adopts bus structures, linkage unit 1,2 ... n mainly comprises line interface and triple gate selection control.The protection linkage unit is passive connecting plate, with the tributary unit of input/output bus and protection by the direct conducting of printing board PCB line in the plate (greatly the time, can pass through tens Europe mothers' isolation resistance conducting in n value, prevent the signal transmission quality deterioration).Three-state control signal CTR0, CTR1 ... CTRn controls the conducting of the triple gate of each linkage unit from cross-connection unit.
N linkage unit is used for by the triple gate selector line input signal being exported to corresponding tributary unit respectively, can also output on the public input bus by the triple gate selector; Simultaneously, the signal that is used for by the triple gate selector tributary unit being come is as line output signal, can also select signal on the public output bus as line output signal by the triple gate selector.
Above-mentioned three-state control signal comes from the cross-connection unit that is in the system core.Cross-connection unit is according to the failure condition of each work branch, and whether the release of decision triple gate.Synchronization is only allowed the triple gate that discharges on the linkage unit.
Adopt the design method of symmetry, needing configuration protection linkage unit on the groove position of configuration protection, configuration effort linkage unit on other groove positions; This demand can satisfy by any appointment of supervisory control system, and the artificial replacement need be passed through in the position of protection linkage unit; In the occasion that does not need protection, the protection linkage unit can be replaced by the work linkage unit, this groove position can be normally professional up and down.
The protection linkage unit is passive linkage unit, directly will protect tributary unit (being the protected location among Fig. 3) conducting (when the n value is big, can prevent the signal transmission quality deterioration by tens Europe mothers' isolation resistance conducting) of bus and protection.
As can see from Figure 3, the design of protection system has symmetry, no specific protection groove position, and before not specifying protection groove position, each groove position is reciprocity.When not needing protection, to close with all triple gates of protection bus interface, linkage unit is selected corresponding tributary unit signal.All groove positions all can the configuration effort linkage unit, normally words up and down; In the occasion that needs the tributary unit protection, only need artificial scene that the linkage unit type is set and get final product (that is to say that one of them tributary unit is set to protect tributary unit).
Principle is switched in protection: the protection of tributary unit is switched and will be moved in two unit, and one is for being in the cross-connection unit of control core.Its two, be the linkage unit of the tributary unit correspondence that breaks down.At first, specify certain tributary unit to be the protection tributary unit by supervisory control system, the corresponding protection linkage unit of human configuration is set the protection priority level of each work branch unit simultaneously.All tributary units are given cross-connection unit with operating state (whether the software and hardware fault alarm is arranged) real-time report, dish disablement signal alarm 1, alarm 2, alarm 3 that cross-connection unit is sent here according to each tributary unit.。。Alarm n, and the situation that the is provided with decision of the situation that is provided with of protection groove position and the protection priority level generation of switching.The prerequisite that protection is switched takes place: protection tributary unit (not having abnormality alarming) working properly; There is not the higher tributary unit of protection level to break down.The realization of protection action: the level counter-rotating (promptly " 0 " becomes " 1 ", and " 1 " becomes " 0 ") of corresponding three-state control signal; Service signal switches--the service signal between work branch unit and the cross-connection unit switched on the protection tributary unit; start the level counter-rotating of the three-state control signal of inefficacy work linkage unit simultaneously; the control fails linkage unit is finished switching action, with the line interface and the conducting of I/O protection bus of inefficacy linkage unit.The switching action of linkage unit referring to the choosing of triple gate selector among Fig. 3 to.
Illustrate below and switch the protection process: suppose manually to be provided with the first from left and be protection tributary unit and protection linkage unit position, other position configuration is work branch unit and linkage unit.Under the normal condition, main business inserts by the tributary unit of work, the protection tributary unit free time.In case detecting the tributary unit of certain work, cross-connection unit lost efficacy (alarm appears in the tributary unit 2 as the work among Fig. 3); it will carry out priority analysis (as whether having the higher tributary unit of priority level to break down according to the position of the tributary unit of working; whether the tributary unit that is in protection is normal); whether decision starts three-state control signal (CTR2); following switching action is finished in control connection unit 2: input/output signal is all swung to protection bus (referring to the selection signal of two selectors in the linkage unit 2 of working among Fig. 3), and any action does not take place the triple gate selector of the linkage unit of other work.
Be to adopt the scheme of Fig. 3 to realize 2Mb/s electricity tributary interface (E1) protection below, the density of tributary unit is 63 tunnel/unit, and the protection of tributary unit is the 1:7 protection.
In the occasion that is not needing to dispose the protection of 2Mb/s electricity tributary interface, 8 groove positions all can be normally call business up and down, system 2Mb/s electricity tributary interface words ability up and down is: 8*63=504 E1 interface.
In the occasion of needs configuration 2Mb/s electricity tributary interface protection, can specify a conduct in 8 groove positions to protect the groove position arbitrarily by supervisory control system (webmaster), remaining groove position is the work nest position, defencive function is normal.
Claims (4)
1. the tributary interface device among the SDH (Synchronous Digital Hierarchy) SDH is characterized in that:
N linkage unit is used for by the triple gate selector line input signal being exported to corresponding tributary unit respectively, can also output on the public input bus by the triple gate selector; Simultaneously, the signal that is used for by the triple gate selector tributary unit being come is as line output signal, can also select signal on the public output bus as line output signal by the triple gate selector; Wherein three-state control signal is controlled the conducting of the triple gate of each linkage unit from cross-connection unit;
The protection linkage unit is used for input/output bus and the conducting of protection tributary unit;
The protection tributary unit is connected with cross-connection unit, the service signal of the tributary unit after being used for misfeed after the tributary unit inefficacy;
Cross-connection unit according to the dish disablement signal alarm that each tributary unit is sent here, is controlled the generation of switching according to the priority level of monitoring unit setting;
When cross-connection unit decision generation protection is switched, by the line output signal of the signal on the public output bus of triple gate selector selection as the inefficacy linkage unit; The linkage unit that lost efficacy is used for will outputing to public input bus from the signal of line interface input by the triple gate selector, as the input signal of the tributary unit of protecting;
Be provided with one the tunnel and be protection linkage unit and protection tributary unit; other is configured to the linkage unit and the tributary unit of work; when not needing the tributary unit protection; the protection linkage unit is replaced by the linkage unit of work; cross-connection unit is according to the malfunction situation of each branch road, and whether the release of decision triple gate, and synchronization is only allowed the triple gate that discharges on the linkage unit; when not needing protection, close with all triple gates of protection bus interface.
2. device according to claim 1 is characterized in that:
When the n value is big, can make input/output bus and the conducting of protection tributary unit by tens Europe mothers' isolation resistance.
3. device according to claim 1 is characterized in that:
The protection linkage unit passes through the interior printing board PCB line of plate with input/output bus and the conducting of protection tributary unit.
4. the method for the configuration of the protection slot flexible among the SDH (Synchronous Digital Hierarchy) SDH is characterized in that:
Step (1) linkage unit is exported to corresponding tributary unit by the triple gate selector respectively with line input signal, can also output on the public input bus by the triple gate selector; Simultaneously, the signal that is used for by the triple gate selector tributary unit being come is as line output signal, can also select signal on the public output bus as line output signal by the triple gate selector; Wherein three-state control signal is controlled the conducting of the triple gate of each linkage unit from cross-connection unit;
Step (2) protection linkage unit is with input/output bus and the conducting of protection tributary unit;
The service signal of the tributary unit step (3) protection tributary unit is used for misfeed after tributary unit lost efficacy after;
The dish disablement signal that step (4) cross-connection unit is sent here according to each tributary unit is alarmed and the situation that is provided with of protection priority level starts corresponding control signal;
Step (5) is controlled triple gate selector according to this control signal so that finish inefficacy tributary unit switching to the protection tributary unit, switch the line interface and the input/output bus conducting that comprise the linkage unit that will break down, described conducting is meant by the line output signal of the signal on the public output bus of triple gate selector selection as the inefficacy linkage unit; The linkage unit that lost efficacy is used for will outputing to public input bus from the signal of line interface input by the triple gate selector, as the input signal of the tributary unit of protecting;
Step (6) is provided with one the tunnel and is protection linkage unit and protection tributary unit; other is configured to the linkage unit and the tributary unit of work; when not needing the tributary unit protection; the protection linkage unit is replaced by the linkage unit of work; cross-connection unit is according to the malfunction situation of each branch road, and whether the release of decision triple gate, and synchronization is only allowed the triple gate that discharges on the linkage unit; when not needing protection, close with all triple gates of protection bus interface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2007100008164A CN101026426B (en) | 2007-01-16 | 2007-01-16 | Tributary interface device and method for protecting slot flexible configuration |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2007100008164A CN101026426B (en) | 2007-01-16 | 2007-01-16 | Tributary interface device and method for protecting slot flexible configuration |
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| Publication Number | Publication Date |
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| CN101026426A CN101026426A (en) | 2007-08-29 |
| CN101026426B true CN101026426B (en) | 2011-07-13 |
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| CN105306253B (en) * | 2015-09-21 | 2019-01-18 | 烽火通信科技股份有限公司 | The pretection switch system and method that branch in optical transfer network and route protection are combined |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1993022856A1 (en) * | 1992-04-23 | 1993-11-11 | Nokia Telecommunications Oy | Synchronization of sdh signals |
| CN1558481A (en) * | 2004-01-16 | 2004-12-29 | 烽火通信科技股份有限公司 | Method for branch line unit protection |
| CN1622485A (en) * | 2004-12-23 | 2005-06-01 | 烽火通信科技股份有限公司 | A novel disk protection method |
| CN1649279A (en) * | 2004-01-20 | 2005-08-03 | 华为技术有限公司 | Branch circuit unit protection switching method and device |
-
2007
- 2007-01-16 CN CN2007100008164A patent/CN101026426B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1993022856A1 (en) * | 1992-04-23 | 1993-11-11 | Nokia Telecommunications Oy | Synchronization of sdh signals |
| CN1558481A (en) * | 2004-01-16 | 2004-12-29 | 烽火通信科技股份有限公司 | Method for branch line unit protection |
| CN1649279A (en) * | 2004-01-20 | 2005-08-03 | 华为技术有限公司 | Branch circuit unit protection switching method and device |
| CN1622485A (en) * | 2004-12-23 | 2005-06-01 | 烽火通信科技股份有限公司 | A novel disk protection method |
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| CN101026426A (en) | 2007-08-29 |
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