CN1700623A - Method for implementing clock management via Q3 interface in synchronous optical network - Google Patents
Method for implementing clock management via Q3 interface in synchronous optical network Download PDFInfo
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Abstract
This invention discloses one method to realize the clock management through Q3 interface in the simultaneous light network and faces the subject clock source to the subject technique and traces different clock network element to save the clock subject examples and determined the relative subject relationship by the needle. The subject relationship reflects the clock tracing and dynamically updates the relationship in the change of the clock reverse and forms Q3 interface clock management information module by one set of clock managed subject.
Description
Technical field
The present invention relates to the Synchronous Optical Network field, be specifically related to a kind of method that in Synchronous Optical Network, realizes Clock management by the Q3 interface.
Background technology
Clock synchronization is the basic function requirement of SDH/SONET network.In order to ensure transmission quality, the SDH/SONET network must guarantee the clock synchronization of each network element, therefore, realizes that on webmaster the supervision of clock signal and management are most important for the normal operation of whole network.For avoiding causing the step-out of whole Synchronization Network owing to the interruption in a clock synchronization path; a common network element can have the path in a plurality of acquisition synchronised clocks source; APS function by clock; when lose in the present clock source that network element is followed the tracks of; can automatically be switched on another clock source, road, guarantee the clock synchronization of transmission system.
SDH/SONET NML (NMS) comprises the management function of clock: obtain network element clock source information, obtain present clock source information, dynamically update clock source information and clock source switching operation etc. under the situation about changing in the clock source.
In order to support the management function of SDH/SONET NML (NMS) to clock, NMS must obtain the relevant information of clock unit from NE management layer (EMS), comprise clock unit information (mode of operation, switch quality, whether recover, recovery time), clock reference source information (comprising reference source quality, source, priority), switch status information, and can dynamically accept the clock relevant information notice reporting of EMS, NMS realizes management to the clock subnet according to these information.
The related notion that relates to the Clock management function is as follows:
Clock synchronization mode of operation: three kinds of mode of operations are arranged usually: normal mode of operation---tracking lock upper level clock pattern; The maintenance pattern---after all timing bases are lost, enter the maintenance pattern from clock; The free-running operation pattern---from all outside references of loss of clock regularly, also lost the timing base memory or be in the maintenance pattern oversize, worked in the free oscillation mode from the clock internal oscillator.
Principal and subordinate's synchronised clock of clock quality: SDH/SONET net can be divided into four types (rank) by precision, and ITU-T carries out standard (clock accuracies at different levels have been carried out standard) with each rank clock, and the clock quality rank is respectively in down from high to low:
Primary resource clock---satisfy G.811 standard;
Transit exchange's clock---satisfy G.812 standard (intermediate office changeover clock);
End office's clock---satisfy G.812 standard (local office clock);
The SDH/SONET Network Element Clock---satisfy G.813 standard (SDH/SONET network element onboard clock).
The clock source category: the kind in SDH/SONET network element clock source comprises:
External clock reference---by synchronous equipment timing physical interface functional block SETPI (Synchronous
Equipment Timing Physical Interface) provides input interface;
The line clock source---by SDH physical interface functional block SPI (Synchronous Physical
Interface) from the STM-N line signal, extract;
Tributary clock sources---by pdh physical interface functional block PPI (PDH Physical Interface) from
Extract in the PDH tributary signal;
Equipment onboard clock source---by synchronous equipment timing source functional block SETS (Synchronous
Equipment Timing Source) provides.
In order to realize the management to telecommunications network, International Telecommunications Union (ITU-T) has proposed Telecommunication Management Network (Telecommunication Management Network).The purpose of TMN is, angle from worldwide telecommunication network, a kind of organized architecture and standardized interface are provided, make between the dissimilar management systems, can both carry out unified integrated maintenance and management according to the method for standard to whole telecommunications network with the mode exchange of management information of unanimity between management system and the telecommunication apparatus.
The Q3 interface is the core of Telecommunication Management Network, it not only comprises the communication protocol of OSI (Open SystemInterconnect Reference Model) from one deck to seven layer, also be included in administrative messag and the Management Information Model used in the layer 7, making between the many producers equipment defer to these agreements can exchange of management information, really realizes the interconnection of open system formula.
By the Q3 interface, lower floor's webmaster provides Q3 interface proxy person (Agent) function, and the upper strata webmaster is realized Q3 interface management person (Manager) function, thereby realizes the unified management of multi-vendor equipment.
ITU-T has provided relevant Q3 interface information model scheme to the contents such as configuration management, fault management, performance management, safety management of transmission, but do not provide Q3 interface information model scheme, therefore also do not realize the method for Clock management by the Q3 interface to Clock management.
Summary of the invention
The purpose of this invention is to provide a kind of method that in Synchronous Optical Network, realizes Clock management, make the Clock management standard, effectively more between NMS and EMS by the Q3 interface.
Concrete technical scheme of the present invention is as follows:
A kind of method that in Synchronous Optical Network, realizes Clock management by the Q3 interface, it is characterized in that: represent the clock source with the object in the Object-oriented Technique, in the network element of following the tracks of the different clocks source, preserve the example of clock source object, determine the relevant object relationship of Clock management by pointer to object, this object relationship reflection clock source tracking relationship, when described clock source tracking relationship changes because of clock switch, dynamically update described object relationship; Form Q3 interface clock Management Information Model by one group of object that is used for Clock management, manager's module of network management system and succedaneum's module of Element management system are carried out the mutual transmission of Clock management information according to this Clock management information model; Carry out the initialization of the relevant object of Clock management by succedaneum's module of described Element management system, when lower floor's webmaster clock information changes, by manager's module of the described network management system of Clock management Q3 interface notice reporting; Manager's module of described network management system is by the succedaneum module inquiry network element clock information of described Clock management Q3 interface to described Element management system, transmitting order to lower levels operation.
Described method, wherein: the described Clock management information model of described Clock management Q3 interface comprises following object:
With reference to timing protected location object, this object is inherited International Telecommunications Union's protected location object, represents a kind of clock source;
With reference to regularly protecting group objects, this object to inherit International Telecommunications Union's protection group objects, the example of this object can comprise the regularly example of protected location object of a plurality of described references.
Described method, wherein: the described Clock management information model of described Clock management Q3 interface comprises following object:
Timing reference input Trail Termination Point object is represented the source in described clock source, and this class object comprises:
Terminal primary reference clock Trail Termination Point object, this object is inherited International Telecommunications Union's end path destination node object;
Terminal synchronizes feed unit Trail Termination Point object, this object is inherited International Telecommunications Union's end path destination node object;
Terminal synchronizes optical network device clock path destination node object, this object is inherited International Telecommunications Union's end path destination node object;
Timing reference input destination point object, the link information in expression and described clock source, this class object comprises:
Top timing reference input destination point object, this object is inherited International Telecommunications Union's top destination point object;
Terminal clock reference source destination point object, this object is inherited International Telecommunications Union's terminal destination point object;
Bidirectional clock reference source destination point object, this object are inherited described top timing reference input destination point object and described terminal clock reference source destination point object;
Synchronous path destination node object, this class object comprises:
Top synchronous path destination node object, this object is inherited International Telecommunications Union's top Trail Termination Point object;
Terminal synchronizes Trail Termination Point object, this object is inherited International Telecommunications Union's end path destination node object;
Bi-directional synchronization Trail Termination Point object, this object are inherited described top synchronous path destination node object and described terminal synchronizes Trail Termination Point object.
Described method, wherein: succedaneum's module of described Element management system is carried out the initialized step of the relevant object of Clock management and is comprised:
A1) inquiry lower floor webmaster obtains the network element clock information;
A2) create the example that group objects is regularly protected in described reference, this attribute with reference to timing protection group example is set simultaneously;
A3) create described example, create the example of the described synchronous path destination node object of each clock source correspondence, the example of the described timing reference input destination point object of establishment, the respective attributes of each object instance is set with reference to timing protected location object;
A4) according to present clock source information correlation between each object instance is set.
Described method, wherein: the step of manager's module inquiry network element clock information of described network management system comprises:
B1) obtain the described example of protecting group objects with reference to timing;
B2) by described with reference to the example of regularly protecting group objects, described example and expression present clock source described with reference to protected location object regularly that obtains its expression clock source that comprises with reference to the example of protected location object regularly;
B3) find the example of the described timing reference input destination point object in described present clock source by the described of described present clock source with reference to the unreliable resource pointer of the example of object of protection regularly, obtain the specifying information in described present clock source;
B4) find the example of the described timing reference input destination point object in other clock source by the described of described expression clock source with reference to the unreliable resource pointer of the example of protected location object regularly, obtain the specifying information in other clock source.
Described method, wherein: during network element end generation clock switch, the operating procedure of succedaneum's module of described Element management system comprises:
C1) obtain the described example that preceding expression present clock source takes place clock switch with reference to timing protected location object;
C2) revise its association attributes, its reliable resource pointer is set to null value;
C3) the expression present clock source after finding clock switch to take place according to switch messages is described with reference to the example of protected location object regularly;
The described reference in the expression present clock source after C4) the modification clock switch takes place is the attribute of the example of protected location object regularly, with the example of the described synchronous path destination node of its reliable resource pointed object;
C5) between the example of the example of the described timing reference input destination point object in described present clock source and described synchronous path destination node object, set up downstream concatenation pointer/upstream concatenation pointer relation;
C6) attribute with each object changes notice reporting to the upper strata webmaster, and the upper strata webmaster is according to this notifier processes clock switch.
Described method, wherein: when manager's module transmitting order to lower levels of described network management system was operated, the operating procedure of succedaneum's module of described Element management system was as follows:
D1) accept the switching operation order;
D2) operation according to the upper strata webmaster requires to be handed down to lower floor's webmaster;
D3) if failure is returned in lower floor's webmaster operation, webmaster returns failed message to the upper strata, EO;
D4) if lower floor's webmaster operation returns success, concern according to present clock source state refresh clock management object, and return success message to the upper strata webmaster.
Described method, wherein: described with reference to regularly protecting group objects to comprise following attribute item:
The protection group identification code: this attribute regularly protects the example of group objects that unique name is provided for the described reference in the network element;
Mode of operation: can this attribute be pointed out by described with reference to regularly protecting the protection mechanism of the case representation of group objects carry out its normal function;
Whether recover automatically: whether this attribute indication protection recovers automatically;
Automatic recovery pattern: this attribute indicates when keeping pattern, and whether recovery is under an embargo automatically;
Recover the stand-by period: this attribute indicates after the fault clearance to being switched to protected resource, the time that protection system need be waited for;
Auto switching clock source quality: this attribute indicates the clock source quality when auto switching takes place;
Clock source mode of operation: the residing mode of operation in this attribute representation's present clock source is one of normal mode, maintenance pattern, free-run mode.
Described method, wherein: described reference regularly protected location object comprises following attribute item:
The protected location identification code: this attribute provides unique name for described example with reference to timing protected location object;
Priority: this attribute indication and described priority with reference to the clock signal that regularly the protected location object is relevant;
The protection purposes: the indication of this attribute described with reference to protected location regularly to as if protectedly still be used to protect;
Reliable resource pointer: this pointer is indicated the clock source of current tracking;
Unreliable resource pointer: this pointer indication and the described relevant unreliable resource of example with reference to timing protected location object;
Guard mode: the described reference of this attribute indication is the protection switch status of the example of protected location object regularly;
The input of external calibration clock: this attribute indication is used for the clock input of external clock calibration.
Described method, wherein: described timing reference input destination point object comprises following attribute item:
The destination point identification code: this attribute provides unique name for the timing reference input destination point in the network element;
The clock source quality: this attribute indicates the quality in clock source;
Priority: this attribute is determined the priority in clock source;
Reference clock Source Type: the reference source type that this attribute representation is different.
The present invention is directed to prior art and can not be in Synchronous Optical Network realize the shortcoming of Clock management, set up Q3 interface clock Management Information Model, thereby make the network management system can the required information of clear description Clock management function by the Q3 interface; Realized being undertaken the function of Clock management, improved the Clock management efficient of SDH/SONET network, remedied the deficiencies in the prior art effectively by the Q3 interface.
Description of drawings
Fig. 1 is a Clock management Q3 interface schematic diagram of the present invention;
Fig. 2 is that succedaneum's module of EMS end of the present invention is carried out the initialized flow chart of clock object;
Fig. 3 is object relationship figure of the present invention;
Fig. 4 is the flow chart of manager's module inquiry network element clock information of NMS end of the present invention;
Fig. 5 be the present invention when network element generation clock switch, the process chart of succedaneum's module of EMS end;
Fig. 6 is the present invention when the NMS end issues operation, the operational flowchart of succedaneum's module of EMS end;
Fig. 7 is the relevant managed object inheritance figure of clock protection of the present invention;
Fig. 8 is the relevant managed object naming relationship figure of clock protection of the present invention;
Fig. 9 is timing reference input Trail Termination Point object inheritance figure of the present invention;
Figure 10 is timing reference input destination point object of the present invention and synchronous path destination node object inheritance figure;
Figure 11 is all kinds of clock destination node naming relationship figure of the present invention.
Embodiment
Below in conjunction with drawings and Examples the present invention is described in further detail:
Fig. 1 has introduced the schematic diagram of Clock management Q3 interface of the present invention, as shown in the figure, communication protocol stack, NMP and Clock management information model are three parts of Clock management Q3 interface, can adopt communication protocol stack based on TCP/IP as communication protocol in realization, CMIP is as NMP, and the Clock management information model then mainly is made up of a group objects of the present invention's design.
In the present invention, represent the clock source with the object in the Object-oriented Technique, in the network element of following the tracks of the different clocks source, preserve the example of clock source object, determine the relevant object relationship of Clock management by pointer to object, this object relationship reflection clock source tracking relationship, when described clock source tracking relationship changes because of clock switch, dynamically update described object relationship.
By following three kinds of operations, realize management between Manager and the Agent to clock:
1) inquiry: Manager inquiry Agent example tree goes up the information of clock object, and the upper strata webmaster can obtain the attribute information of each object of present clock subnet, and can obtain the clock tracing relation of current network;
2) notice reporting: when lower floor's webmaster clock information changed, Agent sent notice reporting to Manager simultaneously according to the information of change information refresh clock management related object example, and the upper strata webmaster dynamically updates the clock information of network in view of the above; Notice reporting information comprises: clock unit is created, clock unit is deleted, the clock unit attribute changes, the clock source increases, delete in the clock source, switch in the present clock source and clock source attribute change untill further notice reports;
3) transmitting order to lower levels operation: the upper strata webmaster can initiatively issue the operational order of clock object, for example increases and decreases the tracing time clock source of network element, initiatively carries out clock switch operation etc.
Fig. 2 has introduced succedaneum's module of Element management system and has carried out the initialized flow chart of clock object, as shown in the figure, lower floor's webmaster is at first inquired about by system, obtains the network element clock information, comprises clock unit information, clock reference source information and present clock reference source information; On Agent example tree, create with reference to timing protection group (rtpg:referenceTimingProtectionGroup) object according to clock unit information then, the attribute of rtpg is set simultaneously, as switches quality, mode of operation etc.; Create with reference to timing protected location (rtpu:referenceTimingProtectionUnit), the synchronous path destination node object (sTTP) of each clock source correspondence, timing reference input destination point object (sCTP) according to timing reference input then, the respective attributes of each object is set; At last correlation between each object is set according to present clock source information.
Fig. 3 has introduced object relationship figure of the present invention, rtpg (referenceTimingProtectionGroup): expression is with reference to regularly protecting group objects; Pgpu: refer to that protecting protection property value is the referenceTimingProtectionUnit object of TRUE, management clock source, a network element can have a plurality of clocks source, so the rtpg object comprises a plurality of pgpu objects;
Pdpu: refer to that protecting protection property value is the referenceTimingProtectionUnit object of FALSE, management present clock source, a network element has only a present clock source, so in a plurality of referenceTimingProtectionUnit objects that the rtpg object comprises, there is and has only a pdpu object, expression present clock source;
Rr (reliableResourcePointer, reliable resource pointer): the selection in expression present clock source, the rr of pdpu points to synchronous path destination node object (sTTP), the rr pointed NULL of pgpu;
Ur (unreliableResourcePointer, unreliable resource pointer): point to clock source destination point, the timing reference input destination point object (sCTP) of the ur pointed correspondence of each clock unit object (pu);
Ds (downstreamConnectivityPointer, the downstream concatenation pointer) and us (upstreamConnectivityPointer, the upstream concatenation pointer): the flow direction of expression present clock reference source, the timing reference input destination point object (sCTP) of the ur pointed of synchronous path destination node object (sTTP) and pdpu is represented the flow direction of present clock reference source by ds and us coreference;
Ccop (crossConnectionObjectPointer, interconnection pointer to object): sCTP and sTTP point to its management object referenceTimingProtectionUnit by ccop;
The relation of above-mentioned object is upgraded according to the change dynamics of clock source tracking relationship, clock switch for example takes place, the protecting attribute of corresponding each clock unit object (pu) changes, after changing, the rr pointed sTTP of new pdpu, sTTP and new sCTP pass through the ds/us coreference.
Fig. 4 is the flow chart of manager's module inquiry network element clock information of network management system, and as shown in the figure, the step of manager's module of network management system inquiry network element clock information comprises:
Obtain the rtpg object;
By the rtpg object, obtain pdpu object, pgpu object that the rtpg object comprises below;
Find the sCTP object in present clock source by the ur pointer of pdpu object, thereby obtain current
The specifying information in clock source;
Find the sCTP object in other clock source by the ur pointer of pgpu object, thereby obtain the specifying information in other clock source;
Can adopt flexible way to obtain network element present clock source information as required, for example, can obtain the sTTP object of network element earlier, can directly obtain the sCTP object in present clock source according to the ds/us pointer of sTTP object, also can be earlier ccop pointer by the sTTP object find the pdpu object, obtain the sCTP object in present clock source again according to the ur pointer of pdpu object.
Fig. 5 be the present invention when network element generation clock switch, the process chart of succedaneum's module of EMS end, as shown in the figure, after clock switch took place, system wanted the be correlated with correlation of MO of refresh clock management, each step is described as follows:
At first obtain current pdpu object, this pdpu object has been represented the present clock source of switching before taking place;
Revising its association attributes, is true with the protecting attribute modification, rr pointed NULL, and in fact this protected location has become the pgpu object after the modification;
Find the pgpu object of representing the present clock source according to switch messages then;
Revising the attribute of this pupu object, is false with the protecting attribute modification, rr pointed sTTP object, and in fact this protected location has become the pdpu object after the modification;
Between the sCTP in present clock source object and sTTP object, set up the ds/us relation.Like this, just set up and switched complete object relationship between each Clock management object of back;
The attribute of each object is changed notice reporting to the upper strata webmaster, and the upper strata webmaster can processing clock be switched according to notice reporting.
Fig. 6 is the present invention when the NMS end issues operation, the operational flowchart of succedaneum's module of EMS end, as shown in the figure, issue under the operational circumstances at the upper strata webmaster, Agent not only wants the correlation of refresh clock object, and also mutual with the levels webmaster respectively, process is as follows:
Agent receives the switching operation order;
Agent requires to be handed down to lower floor's webmaster according to the operation of upper strata webmaster;
If failure is returned in lower floor's webmaster operation, Agent also returns failure to the upper strata webmaster so, EO;
If lower floor's webmaster operation returns success, Agent concerns according to present clock source state refresh clock management object so, and returns success information to the upper strata webmaster.
By with upper type, Agent can dynamic real-time refresh clock object and the corresponding relation of actual transmissions network, guarantees that the upper strata webmaster realizes the dynamic real-time management to clock.
Will carry out Clock management by the Q3 interface, must set up the information model of Clock management, the Clock management information model comprises following object:
1) with reference to the timing protected location
ITU-T G774.3 has defined the protectionUnit object, is the protectionUnit object of true or false by a plurality of protection attribute protection values, can clear describe out current protection relation.In the ITU-T suggestion; the sdhMSProtectionUnit object that multiplex section protection adopts; and the connectionProtection object of SNCP employing, all be to inherit from the protectionUnit object, realize management to multiplex section protection and SNCP.Clock management also needs to describe a plurality of clock source informations with protection relation; need the distinctive information of Clock management simultaneously; so; this programme with the clock source as protected location; adopt new protected location object referenceTimingProtectionUnit object to represent the clock source; inherit from the protectionUnit object, increase the distinctive management information of Clock management, can conveniently satisfy the Clock management needs.Reference is protected location (referenceTimingProtectionUnit) regularly: this managed entity is used for managing protection or the protected timing reference input of Synchronous Optical Network network element (SDH/SONET NE).
The definition reference is the main attribute of protected location regularly:
Protected location identification code (protectionUnitId): this read only attribute is for providing a unique name with reference to the reference timing protected location object instance in the timing protection group;
Priority (priority): the priority of the clock signal that this read-write properties indication is relevant with reference timing protected location object instance.Identical in quality when a plurality of incoming timing reference sources with reference to timing protected location object instance, then selection has the reference timing protected location object instance of high priority;
The protection purposes (protecting): read-only, this attribute indicate this with reference to timing protected location object instance be protected (value: FALSE) or be used for the protection (value: TRUE);
Reliable resource pointer (reliableResourcePointer): this attribute is indicated the clock source of current tracking;
Unreliable resource pointer (unreliableResourcePointer): this attribute indication and the relevant unreliable resource of reference timing protected location object instance;
Guard mode (protectionStatus): this attribute indication is with reference to the protection switch status of timing protected location object instance;
External calibration clock input (externalTimeOut): this read-write attribute indication is used for the clock input (branch road, circuit and PRC) of external clock calibration.This clock is through behind the outside high precision clock source calibration, as an external clock reference.
Mainly notify with reference to the timing protected location:
Property value changes (attributeValueChange): this notice is used to report the variation of a given attribute value.
The definition reference is the protected location object relationship regularly:
One two or more with reference to timing protected location object instance with reference to existing in the timing source protection group objects example.
2) with reference to timing protection group
ITU-T G774.3 has defined protection group (protectiongroup) object; by the protectiongroup object; can realize one or more is had the management of protected location (protectionUnit) object of protection relation; in the suggestion of ITU-T; the sdhMSProtectionGroup object that multiplex section protection adopts; and the connectionProtectionGroup object of SNCP employing; all be to inherit, realize management multiplex section protection and SNCP from the protectiongroup object.Clock management also needs to realize the management that has the clock source of protection relation to a plurality of; need the distinctive information of Clock management simultaneously; so; this programme is handled clock unit as the protection group; adopt new reference timing protection group (referenceTimingProtectionGroup) object to represent a plurality of clock units; inherit from the protectiongroup object of ITU-T, increase the distinctive management information of Clock management, can conveniently satisfy the Clock management needs.
With reference to protection group (referenceTimingProtectionGroup) regularly: this managed object is used for representing being used for the selection with Synchronous Optical Network network element (SDH/SONETNE) the input clock reference source of Network Synchronization, and the basic management function that this object provides has PSE Protection Switch Event to report.
The definition reference is the main attribute of protection group regularly:
Protection group identification code (protectionGroupId): this read only attribute regularly protects the example of group objects that a unique name is provided for the reference in the network element;
Mode of operation (operationalState): can this read only attribute be pointed out by this with reference to regularly protecting the protection mechanism of the case representation of group objects carry out its normal function;
Whether recover automatically (revertive): the readable attribute of writing, whether this attribute indication protection is to recover automatically;
Automatic recovery pattern (autoRestorationMode): read only attribute, this attribute indicate when keeping pattern, and whether recovery is under an embargo automatically;
Recover the stand-by period (waitToRestoreTime): read only attribute, this attribute indicate after the fault clearance to being switched to protected resource, the time that protection system need be waited for (is unit with the second).This attribute is only meaningful to the protected mode of automatic recovery;
Auto switching clock source quality (switchedOnQuality): these read-write properties indicate the clock source quality when auto switching takes place;
Clock source mode of operation (workingMode): the pattern in this attribute representation's present clock source refers to: normal mode, maintenance pattern, free-run mode.
The definition reference is the main notice of protection group regularly:
Report (protectionSwitchReporting) is switched in protection: report PSE Protection Switch Event with reference to the example of regularly protecting group objects with this notice.
Property value changes notice (attributeValueChange): the change of the value of a particular community of report.
The definition reference is the object relationship of protection group regularly:
Usually have the example with reference to the managed object of timing source protection group in a network element entity, a reference regularly protects the example of group objects to comprise the regularly example of protected location object of two or more references.
Fig. 7 represents that the clock protection relates to the inheritance of object; referenceTimingProtectionGroup inherits from ITU-T protectiongroup object G.774.03, and referenceTimingProtectionUnit inherits from ITU-T protectionUnit object G.774.03.
Fig. 8 represents that the clock protection relates to the naming relationship figure of object,
ReferenceTimingProtectionGroup is articulated under the network element object (sdhNE), and referenceTimingProtectionUnit is articulated under the referenceTimingProtectionGroup.Promptly one can comprise a plurality of with reference to timing protected locations (corresponding clock source) with reference to timing protection group (corresponding clock unit).
3) timing reference input Trail Termination Point
In the suggestion of ITU-T, Trail Termination Point object (TTP, comprise trailTerminationPointSource, trailTerminationPointSink, trailTerminationPointBidirectional) expression generation/break path, the kind in SDH/SONET network element clock source comprises external reference source, circuit reference source, branch road reference source, the built-in reference source of equipment, represent various terminations by the Trail Termination Point object, position and source that can each clock source of clear expression without the clock source.The Trail Termination Point of multiplex section Trail Termination Point (msTTP), pdh physical interface Trail Termination Point (pPITTP) expression circuit, branch road is arranged in ITU-T, can directly be used for describing circuit reference source, branch road reference source destination node.The managed object of redetermination was represented below the built-in reference source of external reference source and equipment adopted:
Terminal primary reference clock Trail Termination Point object (pRCTTPSink): primary reference clock (pRC) Trail Termination Point.
Terminal synchronizes feed unit Trail Termination Point object (sSUTTPSink): synchronization supply unit (sSU) Trail Termination Point, the termination in a synchronization supply unit path of expression.
Terminal synchronizes optical network device clock path destination node object (sECTTPSink): Synchronous Optical Network equipment (sEC) clock path destination node, representing the termination in a Synchronous Optical Network equipment clock path provides inner synchronised clock source to network element.
Fig. 9 represents the inheritance figure of timing reference input Trail Termination Point, and sSUTTPSink, sECTTPSink, pRCTTPSink object are inherited from ITU-T trailTerminationPointSink object M.3100.
4) timing reference input destination point
In the suggestion of ITU-T, (CTP comprises the destination point object
ConnectionTerminationPointSource, connectionTerminationPointSink, connectionTerminationPointBidirectional) expression generation/interruption connects, redetermination object top timing reference input destination point object (sCTPSource), terminal clock reference source destination point object (sCTPSink), bidirectional clock reference source destination point object (sCTPBidirectional), inherit from the CTP object, can utilize the defined destination point characteristic of ITU-T on the one hand, increase the peculiar characteristic of timing reference input simultaneously, as the clock source quality, priority etc.
Top timing reference input destination point object (sCTPSource), terminal clock reference source destination point object (sCTPSink), bidirectional clock reference source destination point object (sCTPBidirectional): the connection of the expression beginning or the reference clock source that terminates.
The main attribute of definition timing reference input destination point object:
Timing reference input destination point identification code (sCTPId): read-only, this attribute is that the timing reference input destination point (sCTP) in the network element provides a unique name;
Clock source quality (quality): this read only attribute indicates the quality in clock source;
Priority (Priority): this attribute indicates the priority in clock source;
Reference clock Source Type (referenceType): this attribute indicates the reference source type, distinguishes pRC, sSU-A, different reference source types such as sSU-B, sEC.
5) synchronous path destination node
Comprise top synchronous path destination node object (sTTPSource), terminal synchronizes Trail Termination Point object (sTTPSink), bi-directional synchronization Trail Termination Point object (sTTPBidirectional): the termination of a synchronous path of expression, carry out the selection in clock source, carry out distribution and Network Synchronization function synchronously.
Figure 10 represents timing reference input destination point object of the present invention and synchronous path destination node object inheritance figure; With synchronous path destination node object (sTTP) is example, the sTTPSink object is inherited from ITU-T trailTerminationPointSink object M.3100, the sTTPSource object is inherited from ITU-T trailTerminationPointSource object M.3100, sTTPBidirectional then multiple inheritance from sTTPSource and sTTPSink.The inheritance of timing reference input destination point (sCTP) object is similar.
Figure 11 represents the naming relationship of all kinds of clock destination nodes, a network element can have a plurality of paths that obtain the synchronised clock source, therefore, a network element can comprise a plurality of timing reference input Trail Termination Point objects (comprising sECTTPSink, sSUTTPSink, pRCTTPSink, pPITTPSink, msTTPSink), and each timing reference input Trail Termination Point comprises a timing reference input destination point object (sCTPSink).
Though pass through with reference to the preferred embodiments of the present invention, the present invention is illustrated and describes, but those of ordinary skill in the art should be understood that, can do various changes to it in the form and details, and the spirit and scope of the present invention that do not depart from appended claims and limited.
Claims (10)
1, a kind of method that in Synchronous Optical Network, realizes Clock management by the Q3 interface, it is characterized in that: represent the clock source with the object in the Object-oriented Technique, in the network element of following the tracks of the different clocks source, preserve the example of clock source object, determine the relevant object relationship of Clock management by pointer to object, this object relationship reflection clock source tracking relationship, when described clock source tracking relationship changes because of clock switch, dynamically update described object relationship; Form Q3 interface clock Management Information Model by one group of object that is used for Clock management, manager's module of network management system and succedaneum's module of Element management system are carried out the mutual transmission of Clock management information according to this Clock management information model; Carry out the initialization of the relevant object of Clock management by succedaneum's module of described Element management system, when lower floor's webmaster clock information changes, by manager's module of the described network management system of Clock management Q3 interface notice reporting; Manager's module of described network management system is by the succedaneum module inquiry network element clock information of described Clock management Q3 interface to described Element management system, transmitting order to lower levels operation.
2, method according to claim 1 is characterized in that: the described Clock management information model of described Clock management Q3 interface comprises following object:
With reference to timing protected location object, this object is inherited International Telecommunications Union's protected location object, represents a kind of clock source;
With reference to regularly protecting group objects, this object to inherit International Telecommunications Union's protection group objects, the example of this object can comprise the regularly example of protected location object of a plurality of described references.
3, method according to claim 2 is characterized in that: the described Clock management information model of described Clock management Q3 interface comprises following object:
Timing reference input Trail Termination Point object is represented the source in described clock source, and this class object comprises:
Terminal primary reference clock Trail Termination Point object, this object is inherited International Telecommunications Union's end path destination node object;
Terminal synchronizes feed unit Trail Termination Point object, this object is inherited International Telecommunications Union's end path destination node object;
Terminal synchronizes optical network device clock path destination node object, this object is inherited International Telecommunications Union's end path destination node object;
Timing reference input destination point object, the link information in expression and described clock source, this class object comprises:
Top timing reference input destination point object, this object is inherited International Telecommunications Union's top destination point object;
Terminal clock reference source destination point object, this object is inherited International Telecommunications Union's terminal destination point object;
Bidirectional clock reference source destination point object, this object are inherited described top timing reference input destination point object and described terminal clock reference source destination point object;
Synchronous path destination node object, this class object comprises:
Top synchronous path destination node object, this object is inherited International Telecommunications Union's top Trail Termination Point object;
Terminal synchronizes Trail Termination Point object, this object is inherited International Telecommunications Union's end path destination node object;
Bi-directional synchronization Trail Termination Point object, this object are inherited described top synchronous path destination node object and described terminal synchronizes Trail Termination Point object.
4, method according to claim 3 is characterized in that: succedaneum's module of described Element management system is carried out the initialized step of the relevant object of Clock management and is comprised:
A1) inquiry lower floor webmaster obtains the network element clock information;
A2) create the example that group objects is regularly protected in described reference, this attribute with reference to timing protection group example is set simultaneously;
A3) create described example, create the example of the described synchronous path destination node object of each clock source correspondence, the example of the described timing reference input destination point object of establishment, the respective attributes of each object instance is set with reference to timing protected location object;
A4) according to present clock source information correlation between each object instance is set.
5, method according to claim 4 is characterized in that: the step of manager's module inquiry network element clock information of described network management system comprises:
B1) obtain the described example of protecting group objects with reference to timing;
B2) by described with reference to the example of regularly protecting group objects, described example and expression present clock source described with reference to protected location object regularly that obtains its expression clock source that comprises with reference to the example of protected location object regularly;
B3) find the example of the described timing reference input destination point object in described present clock source by the described of described present clock source with reference to the unreliable resource pointer of the example of object of protection regularly, obtain the specifying information in described present clock source;
B4) find the example of the described timing reference input destination point object in other clock source by the described of described expression clock source with reference to the unreliable resource pointer of the example of protected location object regularly, obtain the specifying information in other clock source.
6, method according to claim 5 is characterized in that: during network element end generation clock switch, the operating procedure of succedaneum's module of described Element management system comprises:
C1) obtain the described example that preceding expression present clock source takes place clock switch with reference to timing protected location object;
C2) revise its association attributes, its reliable resource pointer is set to null value;
C3) the expression present clock source after finding clock switch to take place according to switch messages is described with reference to the example of protected location object regularly;
The described reference in the expression present clock source after C4) the modification clock switch takes place is the attribute of the example of protected location object regularly, with the example of the described synchronous path destination node of its reliable resource pointed object;
C5) between the example of the example of the described timing reference input destination point object in described present clock source and described synchronous path destination node object, set up downstream concatenation pointer/upstream concatenation pointer relation;
C6) attribute with each object changes notice reporting to the upper strata webmaster, and the upper strata webmaster is according to this notifier processes clock switch.
7, method according to claim 6 is characterized in that: when manager's module transmitting order to lower levels of described network management system was operated, the operating procedure of succedaneum's module of described Element management system was as follows:
D1) accept the switching operation order;
D2) operation according to the upper strata webmaster requires to be handed down to lower floor's webmaster;
D3) if failure is returned in lower floor's webmaster operation, webmaster returns failed message to the upper strata, EO;
D4) if lower floor's webmaster operation returns success, concern according to present clock source state refresh clock management object, and return success message to the upper strata webmaster.
8, method according to claim 2 is characterized in that: described with reference to regularly protecting group objects to comprise following attribute item:
The protection group identification code: this attribute regularly protects the example of group objects that unique name is provided for the described reference in the network element;
Mode of operation: can this attribute be pointed out by described with reference to regularly protecting the protection mechanism of the case representation of group objects carry out its normal function;
Whether recover automatically: whether this attribute indication protection recovers automatically;
Automatic recovery pattern: this attribute indicates when keeping pattern, and whether recovery is under an embargo automatically;
Recover the stand-by period: this attribute indicates after the fault clearance to being switched to protected resource, the time that protection system need be waited for;
Auto switching clock source quality: this attribute indicates the clock source quality when auto switching takes place;
Clock source mode of operation: the residing mode of operation in this attribute representation's present clock source is one of normal mode, maintenance pattern, free-run mode.
9, method according to claim 2 is characterized in that: described reference regularly protected location object comprises following attribute item:
The protected location identification code: this attribute provides unique name for described example with reference to timing protected location object;
Priority: this attribute indication and described priority with reference to the clock signal that regularly the protected location object is relevant;
The protection purposes: the indication of this attribute described with reference to protected location regularly to as if protectedly still be used to protect;
Reliable resource pointer: this pointer is indicated the clock source of current tracking;
Unreliable resource pointer: this pointer indication and the described relevant unreliable resource of example with reference to timing protected location object;
Guard mode: the described reference of this attribute indication is the protection switch status of the example of protected location object regularly;
The input of external calibration clock: this attribute indication is used for the clock input of external clock calibration.
10, method according to claim 3 is characterized in that: described timing reference input destination point object comprises following attribute item:
The destination point identification code: this attribute provides unique name for the timing reference input destination point in the network element;
The clock source quality: this attribute indicates the quality in clock source;
Priority: this attribute is determined the priority in clock source;
Reference clock Source Type: the reference source type that this attribute representation is different.
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| CN200410044312A CN1700623B (en) | 2004-05-21 | 2004-05-21 | Method for implementing clock management via Q3 interface in synchronous optical network |
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| CN200410044312A CN1700623B (en) | 2004-05-21 | 2004-05-21 | Method for implementing clock management via Q3 interface in synchronous optical network |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2008125028A1 (en) * | 2007-04-11 | 2008-10-23 | Huawei Technologies Co., Ltd. | A method, an apparatus and a network element for tracing clock |
| CN101141208B (en) * | 2006-09-05 | 2011-11-30 | 中兴通讯股份有限公司 | Synchronization method of optical synchronization digital transmission network |
| CN101110657B (en) * | 2006-07-18 | 2012-07-04 | 中兴通讯股份有限公司 | Method for implementing clock source rearrangement and recovery under condition of single voltage controlled resistor |
| CN106681715A (en) * | 2016-12-09 | 2017-05-17 | 北京五八信息技术有限公司 | Timing function implementation method and system |
| CN110888867A (en) * | 2019-12-09 | 2020-03-17 | 中国航空工业集团公司沈阳飞机设计研究所 | Method and device for realizing redundancy management data structure of unmanned aerial vehicle |
| WO2021238377A1 (en) * | 2020-05-28 | 2021-12-02 | 华为技术有限公司 | Method and apparatus for clock source management |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100295445B1 (en) * | 1999-04-17 | 2001-07-12 | 윤종용 | Method and apparatus for holdind in common between network management systems |
| CN1126332C (en) * | 2000-03-03 | 2003-10-29 | 深圳市中兴通讯股份有限公司 | Multi-service remote-end integrated unit and its networking method |
| CN1138381C (en) * | 2001-06-25 | 2004-02-11 | 华为技术有限公司 | Method for implementing interface between workstation and operating system of telecommunication management network |
-
2004
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101110657B (en) * | 2006-07-18 | 2012-07-04 | 中兴通讯股份有限公司 | Method for implementing clock source rearrangement and recovery under condition of single voltage controlled resistor |
| CN101141208B (en) * | 2006-09-05 | 2011-11-30 | 中兴通讯股份有限公司 | Synchronization method of optical synchronization digital transmission network |
| WO2008125028A1 (en) * | 2007-04-11 | 2008-10-23 | Huawei Technologies Co., Ltd. | A method, an apparatus and a network element for tracing clock |
| US8160053B2 (en) | 2007-04-11 | 2012-04-17 | Huawei Technologies Co., Ltd. | Method, apparatus and network element for clock tracing |
| CN106681715A (en) * | 2016-12-09 | 2017-05-17 | 北京五八信息技术有限公司 | Timing function implementation method and system |
| CN110888867A (en) * | 2019-12-09 | 2020-03-17 | 中国航空工业集团公司沈阳飞机设计研究所 | Method and device for realizing redundancy management data structure of unmanned aerial vehicle |
| CN110888867B (en) * | 2019-12-09 | 2023-08-22 | 中国航空工业集团公司沈阳飞机设计研究所 | Method and device for realizing unmanned aerial vehicle redundancy management data structure |
| WO2021238377A1 (en) * | 2020-05-28 | 2021-12-02 | 华为技术有限公司 | Method and apparatus for clock source management |
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| Publication number | Publication date |
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| CN1700623B (en) | 2010-05-12 |
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