CN103428009A - Method and device for achieving OAM of grouped synchronous networks - Google Patents
Method and device for achieving OAM of grouped synchronous networks Download PDFInfo
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Abstract
The invention provides a method and device for achieving OAM of grouped synchronous networks. The device used in the frequency synchronous network in the grouped synchronous networks comprises a fault detecting module, a performance detecting module and an alarm processing module. The fault detecting module is used for detecting an input and output fault of an external clock, an input and output fault of a circuit clock and a fault of port failure and sending the detected fault to the alarm processing module or directly triggering the frequency synchronous network for clock switching; the performance detecting module is used for detecting the hardware performance of a clock device on the frequency synchronous network and the network performance of the frequency synchronous network and sending a detected performance fault to the alarm processing module; the alarm processing module is used for conducting unified format conversion on the received fault sent by the fault detecting module and/or the performance fault sent by the performance detecting module and reporting alarm information after format conversion to an upper service processing layer. According to the technical scheme, the maintainability and the stability of the grouped synchronous networks are greatly improved.
Description
Technical field
The present invention relates to the communications field, relate in particular to a kind of Operation, Administration and Maintenance (OAM) method and device of realizing the packet synchronization net.
Background technology
Timing Synchronization is widely used in telecommunications, electric power, metrology and measurement, Aero-Space, financial instrument, track traffic, broadcast telecommunications, industry manufacture and national defense and military etc. and communicates by letter and industrial application of information technology field.
Especially for wireless communication system, 2G and time-sharing multiplex pattern (TDM) epoch, business all is based on TDM and transmits, Frequency Synchronization is primary demand wireless, that exchange and transmit network, as global system for mobile communications (GSM), SDH (Synchronous Digital Hierarchy) (SDH), intelligent network etc., a small amount of system needs time synchronized as code division multiple access (CDMA).In 3G and Long Term Evolution (LTE) epoch, Frequency Synchronization and precise synchronization are the basic functions that all 3G and 4G network all have.
In addition, due to universal and a large amount of use of packet network, carry synchronizing signal on packet network, the group-based network is set up frequency/time synchronization network has become trend of the times.
Current time synchronized is mainly to realize by the 1588v2 agreement, claims again Precision Time Protocol (PTP) agreement.Select source and the protection mechanism of PTP agreement are to realize by best master clock (Best Master Clock, BMC) algorithm.
The implementation of carrier class time synchronized mainly comprises two large classes:
Complete Frequency Synchronization and time synchronized by the PTP agreement separately simultaneously;
Utilize the physical layer networks such as SDH or SyncE to complete Frequency Synchronization, on the basis of equipment and the Frequency Synchronization of basic reference clock (PRC), the system clock of set device, recycling PTP carries out the mutual of time message, the time of utilizing the PTP protocol interaction to obtain is revised system clock, thereby realizes time synchronized.
Wherein, rear a kind of mode is because its stability and high accuracy, and, on factors such as the impact of bandwidth are less, has certain technical advantage.
Operation management maintain (Operation, Administration, Maintenance, OAM) function is a whole set of function collection that the network manager administers and maintains existing network, extremely important for the stable operation of communication network, essential.At present the OAM(Operation Administration Maintenance) of transport layer is very perfect, but what mainly face is the management and supervision of all data flow of transport layer.The packet synchronization network is the service network of carrying thereon, has characteristic and the working method of oneself, and the OAM of transport layer can't be directly used in the management and supervision to it.
Increasingly mature along with the world of the clock of group-based network and time synchronized and domestic standard, synchronous function and performance index basic standardization are complete.And, have part operator to start the Synchronization Network of Scaledeployment group-based network.Under this background, for operation, the management of packet synchronization net, safeguard that (being OAM) function just becomes important and urgent.But no matter be the sync correlation standard at present, or Realization of Product, complete definition and realization about packet synchronization net OAM(Operation Administration Maintenance), the particularly definition of time synchronized OAM(Operation Administration Maintenance) all be there is no.Consider the extensive commercialization of product from now on, and synchronizing function is badly in need of improving the OAM(Operation Administration Maintenance) of packet synchronization net as a kind of key business.
Summary of the invention
The embodiment of the present invention provides a kind of OAM method and device of realizing the packet synchronization net, to solve the problem that does not realize the OAM(Operation Administration Maintenance) of packet synchronization net at present.
The embodiment of the present invention provides a kind of OAM device of realizing the packet synchronization net, and the Frequency Synchronization be applied in the packet synchronization net is online, and this device comprises:
Fault detection module, detected for input and output fault and the port failure of removal of the input and output fault to external clock, line clock, to warning processing module, sends the fault detected or directly trigger described Frequency Synchronization net and carry out the clock switching;
Performance detection module, the network performance of the hardware performance of online clockwork and this Frequency Synchronization net for detection of this Frequency Synchronization, send the performance fault detected to described warning processing module;
Described warning processing module, carry out the consolidation form conversion for the fault from described fault detection module that will receive and/or from the performance fault of described performance detection module, and report the warning information after format conversion to the Business treatment on upper strata.
Preferably, described device also comprises: the synchronous regime enquiry module, for receiving the inquiry request of webmaster transmission, and provide running status, network topology state, state handover event or the described warning information of the clockwork of this Frequency Synchronization net according to this inquiry request.
Preferably, described device also comprises: Synchronization Status Message (SSM) module, for the SSM algorithm is expanded, use the NE No., the clock alarm that comprise clock sign, clock quality grade, clock process to indicate, ban use of the SSM protocol massages of sign to carry out clock configuration and clock synchronous.
Preferably, described device also comprises: safety management module, for protocol massages being encrypted and the flow isolation, and carry out authentication vs. authorization for time source or time synchronized client's legitimacy; Wherein, protocol massages comprises SSM protocol massages and Precision Time Protocol (PTP) protocol massages.
Preferably, described device also comprises: notification module, for after described Frequency Synchronization net being detected and carrying out the clock switching, to the time synchronization network tranmitting data register handover information in described packet synchronization net; Perhaps, after described fault detection module detects fault or after described performance detection module detects performance fault, to described time synchronization network, send corresponding fault message.
Preferably, on the clockwork of described application of installation in described Frequency Synchronization net.
The embodiment of the present invention also provides a kind of OAM device of realizing the packet synchronization net, and the time synchronized be applied in the packet synchronization net is online, and this device comprises:
Fault detection module, for global positioning system (GPS) module, Precision Time Protocol (PTP) message and interface are carried out to fault detect, send the fault detected or the clock that triggers described time synchronization network switching to warning processing module;
Performance detection module, the network performance for detection of hardware performance and this time synchronization network of the node device of time synchronization network, send the performance fault detected to described warning processing module;
Described warning processing module, carry out the consolidation form conversion for the fault from described fault detection module that will receive and/or from the performance fault of described performance detection module, and report the warning information after format conversion to the Business treatment on upper strata.
Preferably, described device also comprises: the synchronous regime enquiry module, the inquiry request sent for receiving webmaster, and provide state and state handover event, network topology state or the described warning information of the running status of the node device of this time synchronization network, current different port according to this inquiry request.
Preferably, described device also comprises: link asymmetry detects and compensating module automatically, carries out automatic asymmetry compensation for the synchronization link to this time synchronization network, and reports compensation result to described synchronous regime enquiry module.
Preferably, described device also comprises: time link topology discovery module for receiving the request of the inquiry current time synchronous path information that webmaster sends, and provides the current time synchronous path information of acquisition according to this request.
Preferably, described device also comprises: best master clock (BMC) module, realize the time synchronized path of this time synchronization network for using PTP BMC algorithm; Safety management module, for protocol massages being encrypted and the flow isolation, and carry out authentication vs. authorization for time source or time synchronized client's legitimacy; Wherein, protocol massages comprises BMC protocol massages and Precision Time Protocol (PTP) protocol massages.
Preferably, on the node device of described application of installation in described time synchronization network.
The embodiment of the present invention provides again a kind of Operation, Administration and Maintenance (OAM) method that realizes the packet synchronization net, and this packet synchronization net comprises Frequency Synchronization net and the time synchronization network based on this Frequency Synchronization net, and the method comprises:
Described Frequency Synchronization net is detected the input and output fault of external clock, input and output fault and the port failure of removal of line clock, directly triggers the clock switching after fault being detected; To this Frequency Synchronization, the hardware performance of online clockwork and network performance are detected; And the Business treatment that the fault that detects and/or performance fault carry out after the consolidation form conversion reporting to upper strata is processed;
Described time synchronization network is carried out fault detect to global positioning system (GPS) module, Precision Time Protocol (PTP) message and interface, directly triggers the clock switching after fault being detected; Hardware performance and network performance to the node device of time synchronization network are detected; And the Business treatment that the fault that detects and/or performance fault carry out after the consolidation form conversion reporting to upper strata is processed.
Preferably, described method also comprises: described Frequency Synchronization net is after described Frequency Synchronization net being detected and carrying out the clock switching, to described time synchronization network tranmitting data register handover information; Perhaps, after fault being detected or after performance fault, to described time synchronization network, send corresponding fault message.
Adopt the embodiment of the present invention, can realize the Operations, Administration and Maintenance to the packet synchronization net, make operator can manage easily its packet synchronization net, greatly improved maintainability and the stability of packet synchronization net.
The accompanying drawing explanation
Fig. 1 is the functional frame composition of packet synchronization net embodiment of the present invention;
Fig. 2 is the structural representation that the present invention realizes the OAM device embodiment mono-of packet synchronization net;
Fig. 3 is the structural representation that the present invention realizes the OAM device embodiment bis-of packet synchronization net;
Fig. 4 is the configuration diagram of the Synchronization Network in carrier class grouping mobile backhaul net of the present invention.
Embodiment
For making the purpose, technical solutions and advantages of the present invention clearer, hereinafter in connection with accompanying drawing, embodiments of the invention are elaborated.It should be noted that, in the situation that do not conflict, the embodiment in the application and the feature in embodiment be combination in any mutually.
Packet synchronization net the most complete is divided into 2 layer networks: Frequency Synchronization net and the base time synchronization network thereon on basis.Angle from management maintenance, these 2 layers of each have their own characteristics of Synchronization Network, each have their own OAM(Operation Administration Maintenance) demand, so OAM(Operation Administration Maintenance) needs the layering operation from framework, that is: a set of OAM(Operation Administration Maintenance) collection of Frequency Synchronization network operation, the another set of OAM(Operation Administration Maintenance) collection of time synchronized network operation.Between these 2 layers of OAM(Operation Administration Maintenance) collection, can there is partial function to overlap.In addition, fault and performance degrades and the situations such as clockwork or synchronizing network state variation under need some interaction mechanisms, as shown in Figure 1.
Frequency Synchronization net OAM(Operation Administration Maintenance) collection should comprise following function: fault detect and report; Performance monitoring and report; The synchronous regime inquiry generates with alarm; Grouped frequency Synchronization Network Synchronization Status Message (SSM) strengthens function; And, safety management.
Below illustrate one by one above function:
(1) fault detect and report
For the Frequency Synchronization net, detection and the report mechanism of the fault there will be and correspondence are as follows:
External clock input/output fault: mainly comprise input/output frequency dropout fault, the external clock alarm indication of global positioning system (GPS) external clock, 2M Hz external clock, 2M bit/s external clock and suppress (AIS), LOF (LOF) fault etc.These faults are detected and are reported switching of webmaster or direct triggering synchronous net on the clockwork interface of direct-connected external clock;
Line clock input/output fault: mainly comprise the input/output frequency dropout fault of SDH line clock, FE/GE line clock, 1588 line clocks, the input/output frequency signal error fault of line clock etc.Detected and reported switching of webmaster or direct triggering synchronous net on the line interface of these failing clock equipment;
The port failure of removal: no matter be the external clock input/output end port, or the input/input port of line clock, the fault lost efficacy all may occur, this clockwork should be supported its detection and report webmaster or direct switching of triggering synchronous net.
(2) Performance Detection and report
For the Frequency Synchronization net, Performance Detection is very important OAM(Operation Administration Maintenance), and detection and the report mechanism of main performance fault and correspondence thereof are as follows:
Under the aging and temperature beyond limit of crystal oscillator, locking, the voltage-controlled voltage fluctuation of constant-temperature crystal oscillator (OCXO) is out-of-limit: the performance fault of these clockworks self hardware view can be detected and notify the upper-layer protocol processing layer to carry out subsequent treatment;
The clock reference source frequency crosses the border, packet delay changes (PDV) network quality and descends out-of-limit: these belong to the network performance fault, when the network performance that detects upstream when certain clockwork degrades, alarm notification upper-layer protocol processing layer can be carried out to subsequent treatment;
Performance statistics: comprise the voltage-controlled voltage performance statistics of OCXO, PDV network performance statistics, real-time packet statistics etc.This function can offer webmaster and check at any time the overall performance situation in a period of time before.
(3) synchronous regime inquiry
This OAM(Operation Administration Maintenance) collection is mainly used in each equipment running status that webmaster obtains the Frequency Synchronization net in time.Mainly comprise following mechanism:
State handover event notifying mechanism: comprise detection and the announcement of the events such as clock source is switched, the switching of frequency phase lock ring status, synchronization link switching.
(4) alarming processing
The fault that this OAM(Operation Administration Maintenance) collection is mainly used in occurring carries out generating warning information after the consolidation form conversion.Mainly comprise following mechanism:
Alarming mechanism: the notifying mechanism to all functional faults, performance fault and some special events to the upper-layer service processing layer.
(5) grouped frequency Synchronization Network SSM strengthens function
Existing SSM algorithm can be realized the synchronous of grouped frequency well, but it has two weak points:
A, can not process well the problem of synchronised clock Cheng Huan, therefore need to pay special attention on engineering and in the clock configuration especially, guarantee to avoid occurring the situation of clock Cheng Huan;
The attenuation problem of B, frequency signal; Along with the increase of synchronization link number, gradually deteriorated of the noise of synchronous assigning process and the quality that the caused drift of variations in temperature all can make timing reference signal, therefore on same synchronization link, the actual synchronously number of network element is limited.But existing SSM algorithm can't reference clock equipment jumping figure selected source.
Suitable expansion by existing SSM algorithm makes in the SSM protocol massages and comprises: sign is indicated, is banned use of in the NE No. of clock sign, clock quality grade, clock process, clock alarm.Make the grouped frequency net can solve well above two problems.
(6) safety management
If the grouped frequency of using the PTP message mode to carry out is synchronous, PTP regularly stream of packets may need to cross over a plurality of network areas, and therefore regularly the fail safe of stream of packets must be considered.The mode that can take has:
Message encryption, checking;
Flow isolation: by VLAN (vlan) isolation flow, or be carried on 1588 agreements (1588over LSP) in LSP;
Prevent that client clock (Slave) is connected to wrong master clock (Master), prevent that Master from providing synchronous service etc. to undelegated Slave;
Time synchronization network OAM(Operation Administration Maintenance) collection should comprise following function: fault detect and report, the announcement of PTP BMC algorithm information, performance monitoring and report (comprising detection and the filtration of phase hit), synchronous regime inquiry and alarm generation, the automatic detection of link asymmetry and compensation, time link topology discovery mechanism and safety management.
Below illustrate one by one above function:
(1) fault detect and report
For time synchronization network, detection and the report mechanism of the fault there will be and correspondence are as follows:
The GPS dependent failure: the basic reference time source (PRTC) of time synchronization network or terminal equipment can directly connect GPS and obtain frequency and time signal, when the GPS module on it breaks down, such as dropout, signal are unavailable, lose magnitude, need to report in time switching of webmaster or triggering synchronous net;
PTP message monitoring and report: comprise the content false of the out-of-limit and all PTP messages of the loss of the general message that loss is out-of-limit, some are important (Announce, Follow_up, Delay_Resp etc.) of all event messages (Sync, Delay_Req, Pdelay_Req, Pdelay_Resp) etc.;
The fault of 1PPS+ToD interface and Performance Detection: 1PPS+ToD is used very general external interface in time synchronization network, can transmit frequency+time signal to equipment simultaneously, if this interface breaks down, must process in time;
(2) PTP BMC algorithm information announcement
The PTP agreement is used the BMC protocol algorithm to calculate in real time state and the switching of the current different port of this equipment on each OC and BC equipment, comprise initialization (initializing), fault (faulty), disabled (going to enable), listening (monitoring), pre_master (pre-master port), master port (master), passive (passive port), uncalibrated (in advance from port), from port (slave), and notify in time webmaster and upper-layer service processing layer by these information.
(3) performance monitoring and report (comprising detection and the filtration of phase hit)
For time synchronization network, performance monitoring is very important OAM(Operation Administration Maintenance), main performance fault and corresponding detection and report mechanism following (partial function overlaps with the Performance Detection OAM(Operation Administration Maintenance) of Frequency Synchronization net) thereof:
Under the aging and temperature beyond limit of crystal oscillator, locking, the voltage-controlled voltage fluctuation of OCXO is out-of-limit: the performance fault of these clockworks self hardware view can be detected and notify the upper-layer protocol processing layer to carry out subsequent treatment;
It is out-of-limit that time reference source phase place is crossed the border, the PDV network quality descends: these belong to the network performance fault, when the network performance that detects upstream when certain clockwork degrades, alarm notification upper-layer protocol processing layer can be carried out to subsequent treatment;
Performance statistics: comprise the voltage-controlled voltage performance statistics of OCXO, PDV network performance statistics, real-time packet statistics etc.This function can offer webmaster and check at any time the overall performance situation in a period of time before;
The looped network time failure detects and location mechanism automatically: ring-network topology is widely used in communication network, utilize its special topology, and the extension negotiation mechanism of some PTP messages, can realize automatic detection and the localization of fault of the fault that the time synchronization error of all nodes on looped network is out-of-limit;
Phase hit testing mechanism: when synchronization link generation change in topology, by synchronizer, be there will be phase hit, detect this saltus step and carry out smoothing processing or filtration treatment must be supported.
(4) synchronous regime inquiry
This OAM(Operation Administration Maintenance) collection is mainly used in each equipment running status of the timely acquisition time Synchronization Network of webmaster.Mainly comprise following mechanism:
State handover event notifying mechanism: comprise detection and the announcement of the events such as time source is switched, ancestral's clock (GrandMaster) switching, 1588 phase-locked loop state switchings, the switching of PTP equipment state.
(5) alarm generates
Alarm after this OAM(Operation Administration Maintenance) collection is mainly used in breaking down generates and announcement.Mainly comprise following mechanism:
Alarming mechanism: to the notifying mechanism to the upper-layer service processing layer of all functional faults, performance fault and some special events.
(6) link asymmetry detects and compensation automatically
Concerning time synchronized, the compensation of the asymmetry of link is very important, the problem that must solve.Current common method is after carrying out the measurement of pointwise by tester, more manual compensation.Although this method realizes simple, consuming time, effort, cost is very high.Needing technically has auto-compensation mechanism, and the lower method of some costs, and following optional replacement scheme is arranged at present:
Base station GPS directly measures asymmetric value compensation;
Change fine auto-compensation scheme: be divided into manual and automatic 2 kinds of modes;
Single fiber bi-directional scheme: be of limited application;
The automatic detection scheme of looped network: it is convenient to safeguard, but, under some scenes, has loss.
(7) time link topology discovery mechanism
Be mainly a kind of Topology Discovery mechanism as required, by protocol massages and the interaction mechanism of expansion PTP, realize a kind of topology information exchange and inquiry mechanism.For assisting webmaster to inquire about at any time current time synchronized routing information, contribute to the network planning and fault location.
(8) safety management
Similar with the grouped frequency net that the PTP mode realizes, the packet time that uses the PTP message mode to carry out is synchronous, and PTP regularly stream of packets may need to cross over a plurality of network areas, and therefore regularly the fail safe of stream of packets must be considered.The mode that can take has:
Message encryption, checking;
The flow isolation: isolate flow by vlan, or 1588over LSP;
Prevent that Slave is connected to wrong Master, prevent that Master from providing synchronous service etc. to undelegated Slave.
2 layers of Synchronization Network defined above OAM(Operation Administration Maintenance) collection separately is that interaction mechanism each other need to be arranged in some cases.Mainly comprise:
Frequency Synchronization net fault and performance degrade and announce to time synchronization network: the precision of the time synchronized of time synchronization network, stability are affected by the Frequency Synchronization net, when Frequency Synchronization net OAM mechanism is found fault, when perhaps performance degrades, must notify time synchronization network, it is processed accordingly;
The Frequency Synchronization net state changes to be announced to time synchronization network: this state comprises the running status of clockwork; also comprise the state that the Frequency Synchronization network topology changes; the variation of these states all can exert an influence to time synchronization network, such as the protection switching of Frequency Synchronization net can cause time synchronization network, phase hit to a certain degree etc. occurs.So these situations of change all must be notified time synchronization network in time, and it is processed accordingly.
Utilize a set of fairly perfect packet synchronization net OAM framework and function collection defined above, and the interaction mechanism between them, can realize the Operations, Administration and Maintenance to the packet synchronization net, make operator can manage easily its packet synchronization net, greatly improved maintainability and the stability of packet synchronization net.
In order to complete well above-mentioned functions, the embodiment of the present invention provides a kind of Operation, Administration and Maintenance (OAM) device of realizing the packet synchronization net, the Frequency Synchronization be applied in the packet synchronization net is online, as shown in Figure 2, this device comprises fault detection module 21, performance detection module 22 and warning processing module 23, wherein:
Fault detection module, detected for input and output fault and the port failure of removal of the input and output fault to external clock, line clock, to warning processing module, sends the fault detected or directly trigger described Frequency Synchronization net and carry out the clock switching;
Performance detection module, the network performance of the hardware performance of online clockwork and this Frequency Synchronization net for detection of this Frequency Synchronization, send the performance fault detected to described warning processing module;
Described warning processing module, carry out the consolidation form conversion for the fault from described fault detection module that will receive and/or from the performance fault of described performance detection module, and report the warning information after format conversion to the Business treatment on upper strata.
Wherein, this device can also comprise: SSM module 24, for the SSM algorithm is expanded, use the NE No., the clock alarm that comprise clock sign, clock quality grade, clock process to indicate, ban use of the SSM protocol massages of sign to carry out clock configuration and clock synchronous.This SSM module can be avoided the problem of synchronised clock Cheng Huan and the attenuation problem of frequency signal well.
In addition, this device can also comprise: safety management module 25, for protocol massages being encrypted and the flow isolation, and carry out authentication vs. authorization for time source or time synchronized client's legitimacy; Wherein, protocol massages comprises SSM protocol massages and Precision Time Protocol (PTP) protocol massages.
Preferably, described device can also comprise: synchronous regime enquiry module 26, for receiving the inquiry request of webmaster transmission, and provide running status, network topology state, state handover event or the described warning information of the clockwork of this Frequency Synchronization net according to this inquiry request.
Further, described device can also comprise: notification module 27, for after described Frequency Synchronization net being detected and carrying out the clock switching, to the time synchronization network tranmitting data register handover information in described packet synchronization net; Perhaps, after described fault detection module detects fault or after described performance detection module detects performance fault, to described time synchronization network, send corresponding fault message.Said apparatus completes mutual with time synchronization network by this notification module just.
Said apparatus is applied on the clockwork in described Frequency Synchronization net.
Accordingly, in order to realize better above-mentioned functions, the embodiment of the present invention also provides a kind of OAM device of realizing the packet synchronization net, and the time synchronized be applied in the packet synchronization net is online, this device comprises fault detection module 31, performance detection module 32 and warning processing module 33, wherein:
Fault detection module, for global positioning system (GPS) module, PTP message and interface are carried out to fault detect, send the fault detected or the clock that triggers described time synchronization network switching to warning processing module;
Performance detection module, the network performance for detection of hardware performance and this time synchronization network of the node device of time synchronization network, send the performance fault detected to described warning processing module;
Described warning processing module, carry out the consolidation form conversion for the fault from described fault detection module that will receive and/or from the performance fault of described performance detection module, and report the warning information after format conversion to the Business treatment on upper strata.
Wherein, described device also comprises: best master clock (BMC) module 34, the time synchronized path that point-to-point for using (PTP) BMC algorithm is realized this time synchronization network; Safety management module 35, for protocol massages being encrypted and the flow isolation, and carry out authentication vs. authorization for time source or time synchronized client's legitimacy; Wherein, protocol massages comprises BMC protocol massages and Precision Time Protocol (PTP) protocol massages.What above-mentioned BMC module adopted is prior art.
In addition, described device can also comprise: synchronous regime enquiry module 36, the inquiry request sent for receiving webmaster, and provide state and state handover event, network topology state or the described warning information of the running status of the node device of this time synchronization network, current different port according to this inquiry request.
Further, described device also comprises: link asymmetry detects and compensating module 37 or time link topology discovery module 38 automatically; This link asymmetry detects and compensating module automatically, carries out automatic asymmetry compensation for the synchronization link to this time synchronization network, and reports compensation result to described synchronous regime enquiry module.This time link topology discovery module, for receiving the request of the inquiry current time synchronous path information that webmaster sends, and provide the current time synchronous path information of acquisition according to this request.
Said apparatus is applied on the node device in described time synchronization network.
The OAM method that realizes this packet synchronization network be applied on above-mentioned packet synchronization network comprises:
Step 1, described Frequency Synchronization net are detected the input and output fault of external clock, input and output fault and the port failure of removal of line clock, directly trigger the clock switching after fault being detected; To this Frequency Synchronization, the hardware performance of online clockwork and network performance are detected; And the Business treatment that the fault that detects and/or performance fault carry out after the consolidation form conversion reporting to upper strata is processed;
Step 2, described time synchronization network are carried out fault detect to global positioning system (GPS) module, PTP message and interface, directly trigger the clock switching after fault being detected; Hardware performance and network performance to the node device of time synchronization network are detected; And the Business treatment that the fault that detects and/or performance fault carry out after the consolidation form conversion reporting to upper strata is processed.
In addition, between described Frequency Synchronization net and time synchronization network, have some mutual, for example described Frequency Synchronization net is after described Frequency Synchronization net being detected and carrying out the clock switching, to described time synchronization network tranmitting data register handover information; Perhaps, after fault being detected or after performance fault, to described time synchronization network, send corresponding fault message.
In a word, said method can be realized the Operations, Administration and Maintenance to the packet synchronization net, makes operator can manage easily its packet synchronization net, has greatly improved maintainability and the stability of packet synchronization net.
Embodiment
Fig. 2 is the Organization Chart of a Synchronization Network in typical carrier class grouping mobile backhaul net, wherein comprises Frequency Synchronization net and time synchronization network.
On each clockwork of Frequency Synchronization net, or the clockwork of some key positions, can be in real time or move desirably or several the functions that following OAM(Operation Administration Maintenance) is concentrated:
Fault detect and report;
Performance monitoring and report;
The synchronous regime inquiry generates with alarm;
Grouped frequency Synchronization Network SSM strengthens function;
Safety management.
Time synchronization network is by various types of PTP nodes (comprising OC, BC, TC etc.) equipment, or general load bearing equipment forms.On each PTP node device of time synchronization network, or the PTP node device of some key positions, can be in real time or move desirably or several the functions that following OAM(Operation Administration Maintenance) is concentrated:
Fault detect and report;
The announcement of PTP BMC algorithm information;
Performance monitoring and report (comprising detection and the filtration of phase hit);
The synchronous regime inquiry generates with alarm;
Link asymmetry detects and compensation automatically;
Time link topology discovery mechanism;
Safety management.
Between these 2 layers of OAM(Operation Administration Maintenance) collection, can there is partial function to overlap.In addition, fault and performance degrades and the situations such as clockwork or synchronizing network state variation under, need some interaction mechanisms.
In sum, according to the abovementioned embodiments of the present invention, provide a set of fairly perfect packet synchronization net OAM framework and function collection, and the interaction mechanism between them, can realize the Operations, Administration and Maintenance to the packet synchronization net.Make operator can manage easily its packet synchronization net, greatly improved maintainability and the stability of packet synchronization net.
Obviously, those skilled in the art should be understood that, above-mentioned each module of the present invention or each step can realize with general calculation element, they can concentrate on single calculation element, perhaps be distributed on the network that a plurality of calculation elements form, alternatively, they can be realized with the executable program code of calculation element, thereby, they can be stored in storage device and be carried out by calculation element, perhaps they are made into respectively to each integrated circuit modules, perhaps a plurality of modules in them or step being made into to the single integrated circuit module realizes.Like this, the present invention is not restricted to any specific hardware and software combination.
Above embodiment is only unrestricted in order to technical scheme of the present invention to be described, only with reference to preferred embodiment, the present invention is had been described in detail.Those of ordinary skill in the art should be appreciated that and can modify or be equal to replacement technical scheme of the present invention, and do not break away from the spirit and scope of technical solution of the present invention, all should be encompassed in the middle of claim scope of the present invention.
Claims (14)
1. an Operation, Administration and Maintenance (OAM) of realizing the packet synchronization net installs, and the Frequency Synchronization be applied in the packet synchronization net is online, it is characterized in that, this device comprises:
Fault detection module, detected for input and output fault and the port failure of removal of the input and output fault to external clock, line clock, to warning processing module, sends the fault detected or directly trigger described Frequency Synchronization net and carry out the clock switching;
Performance detection module, the network performance of the hardware performance of online clockwork and this Frequency Synchronization net for detection of this Frequency Synchronization, send the performance fault detected to described warning processing module;
Described warning processing module, carry out the consolidation form conversion for the fault from described fault detection module that will receive and/or from the performance fault of described performance detection module, and report the warning information after format conversion to the Business treatment on upper strata.
2. device according to claim 1, is characterized in that, described device also comprises:
The synchronous regime enquiry module, for receiving the inquiry request of webmaster transmission, and provide running status, network topology state, state handover event or the described warning information of the clockwork of this Frequency Synchronization net according to this inquiry request.
3. device according to claim 1, is characterized in that, described device also comprises:
Synchronization Status Message (SSM) module, for the SSM algorithm is expanded, use the NE No., the clock alarm that comprise clock sign, clock quality grade, clock process to indicate, ban use of the SSM protocol massages of sign to carry out clock configuration and clock synchronous.
4. device according to claim 1, is characterized in that, described device also comprises:
Safety management module, for protocol massages being encrypted and the flow isolation, and carry out authentication vs. authorization for time source or time synchronized client's legitimacy; Wherein, protocol massages comprises SSM protocol massages and Precision Time Protocol (PTP) protocol massages.
5. device according to claim 1, is characterized in that, described device also comprises:
Notification module, for after detecting described Frequency Synchronization net and carrying out the clock switching, to the time synchronization network tranmitting data register handover information in described packet synchronization net; Perhaps, after described fault detection module detects fault or after described performance detection module detects performance fault, to described time synchronization network, send corresponding fault message.
6. according to the described device of the arbitrary claim of claim 1-5, it is characterized in that:
On the clockwork of described application of installation in described Frequency Synchronization net.
7. an Operation, Administration and Maintenance (OAM) of realizing the packet synchronization net installs, and the time synchronized be applied in the packet synchronization net is online, it is characterized in that, this device comprises:
Fault detection module, for global positioning system (GPS) module, Precision Time Protocol (PTP) message and interface are carried out to fault detect, send the fault detected or the clock that triggers described time synchronization network switching to warning processing module;
Performance detection module, the network performance for detection of hardware performance and this time synchronization network of the node device of time synchronization network, send the performance fault detected to described warning processing module;
Described warning processing module, carry out the consolidation form conversion for the fault from described fault detection module that will receive and/or from the performance fault of described performance detection module, and report the warning information after format conversion to the Business treatment on upper strata.
8. device according to claim 7, is characterized in that, described device also comprises:
The synchronous regime enquiry module, for receiving the inquiry request of webmaster transmission, and provide state and state handover event, network topology state or the described warning information of the running status of the node device of this time synchronization network, current different port according to this inquiry request.
9. device according to claim 7, is characterized in that, described device also comprises:
Link asymmetry detects and compensating module automatically, carries out automatic asymmetry compensation for the synchronization link to this time synchronization network, and reports compensation result to described synchronous regime enquiry module.
10. device according to claim 7, is characterized in that, described device also comprises:
Time link topology discovery module, for receiving the request of the inquiry current time synchronous path information that webmaster sends, and provide the current time synchronous path information of acquisition according to this request.
11. device according to claim 7, is characterized in that, described device also comprises:
Best master clock (BMC) module, realize the time synchronized path of this time synchronization network for using PTP BMC algorithm;
Safety management module, for protocol massages being encrypted and the flow isolation, and carry out authentication vs. authorization for time source or time synchronized client's legitimacy; Wherein, protocol massages comprises BMC protocol massages and Precision Time Protocol (PTP) protocol massages.
12., according to the described device of the arbitrary claim of claim 7-11, it is characterized in that:
On the node device of described application of installation in described time synchronization network.
13. Operation, Administration and Maintenance (OAM) method that realizes the packet synchronization net, this packet synchronization net comprises Frequency Synchronization net and the time synchronization network based on this Frequency Synchronization net, it is characterized in that, the method comprises:
Described Frequency Synchronization net is detected the input and output fault of external clock, input and output fault and the port failure of removal of line clock, directly triggers the clock switching after fault being detected; To this Frequency Synchronization, the hardware performance of online clockwork and network performance are detected; And the Business treatment that the fault that detects and/or performance fault carry out after the consolidation form conversion reporting to upper strata is processed;
Described time synchronization network is carried out fault detect to global positioning system (GPS) module, Precision Time Protocol (PTP) message and interface, directly triggers the clock switching after fault being detected; Hardware performance and network performance to the node device of time synchronization network are detected; And the Business treatment that the fault that detects and/or performance fault carry out after the consolidation form conversion reporting to upper strata is processed.
14. method according to claim 13, is characterized in that, described method also comprises:
Described Frequency Synchronization net is after described Frequency Synchronization net being detected and carrying out the clock switching, to described time synchronization network tranmitting data register handover information; Perhaps, after fault being detected or after performance fault, to described time synchronization network, send corresponding fault message.
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