CN103428009B - Realize Operation, Administration and Maintenance (OAM) method and device of packet synchronization net - Google Patents
Realize Operation, Administration and Maintenance (OAM) method and device of packet synchronization net Download PDFInfo
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Abstract
The present invention provides a kind of OAM method and devices for realizing packet synchronization net, wherein includes applied to the device of the Frequency Synchronization in packet synchronization net on the net：Fault detection module, input and output failure and port failure of removal for input and output failure, line clock to external clock are detected, and are sent the failure detected to warning processing module or are directly triggered the Frequency Synchronization net into row clock switching；Performance detection module, the network performance of hardware performance and the Frequency Synchronization net for detecting the online clockwork of the Frequency Synchronization send the performance fault detected to the warning processing module；The warning processing module, the warning information for the failure from the fault detection module received and/or the performance fault from the performance detection module to be carried out unified format conversion, and after reporting format conversion to the bussiness processing layer on upper layer.Technical solution using the present invention greatly improves the maintainability and stability of packet synchronization net.
Description
Technical field
The present invention relates to the communications field more particularly to a kind of Operation, Administration and Maintenance (OAM) sides realizing packet synchronization net
Method and device.
Background technology
Timing Synchronization is widely used in telecommunications, electric power, metrology and measurement, aerospace, financial instrument, rail traffic, broadcast
Communications and the industrial application of information technology fields such as telecommunications, industry manufacture and national defense and military.
Especially for wireless communication system, 2G and time-sharing multiplex pattern (TDM) epoch, business are all based on TDM transmission, frequency
It is primary demand that is wireless, exchanging and transmit network that rate, which synchronizes, such as global system for mobile communications (GSM), synchronous digital system
(SDH), intelligent network etc., a small amount of system such as CDMA (CDMA) need time synchronization.In 3G and long term evolution (LTE)
Generation, Frequency Synchronization and precise synchronization are the basic functions that all 3G and 4G networks all have.
Further, since the universal and a large amount of of packet network uses, synchronizing signal is carried over a packet network, based on grouping net
Network establishes frequency/time synchronization network and has become trend of the times.
Current time synchronization mainly passes through 1588v2 protocol realizations, also known as Precision Time Protocol (PTP) agreement.PTP
The select source and protection mechanism of agreement are realized by best master clock (Best Master Clock, BMC) algorithm.
The realization method of carrier class time synchronization includes mainly two major classes：
Individually Frequency Synchronization and time synchronization are completed at the same time with PTP protocol；
Frequency Synchronization is completed using physical layer networks such as SDH or SyncE, in the frequency of equipment and basic reference clock (PRC)
On the basis of rate synchronizes, the system clock of set device is recycled PTP to carry out the interaction of time message, is interacted using PTP protocol
The acquired time is modified system clock, to realize time synchronization.
Wherein, latter approach is because of its stability and high-precision, and the factors such as the influence to bandwidth is smaller, has certain
Technical advantage.
Operation management maintainance (Operation, Administration, Maintenance, OAM) function is network management
Member is extremely important for the stable operation of telecommunication network to a whole set of function collection of existing net management and maintenance, essential.At present
The OAM(Operation Administration Maintenance) of transport layer is very perfect, but mainly face be all data flows of transport layer management and monitoring.Grouping is same
It is the service network being carried thereon to walk network, has a characteristic and working method of oneself, and the OAM of transport layer cannot be used directly for pair
Its management and monitoring.
With increasingly mature, the synchronous function of the international and national standard of clock and time synchronization based on packet network
Basic standardization finishes with performance indicator.Also, there is part operator to start Scaledeployment based on the same of packet network
Walk net.In this context, for the operation of packet synchronization net, management, safeguard that (i.e. OAM) function just becomes important and urgent
Come.But either synchronous relevant criterion or product are realized at present, all not about the complete fixed of packet synchronization net OAM(Operation Administration Maintenance)
Justice and realization, the especially definition of time synchronization OAM(Operation Administration Maintenance).In view of the extensive commercialization of product from now on, and synchronizing function
As a kind of key business, it is badly in need of improving the OAM(Operation Administration Maintenance) of packet synchronization net.
Invention content
An embodiment of the present invention provides a kind of OAM method and devices for realizing packet synchronization net, to solve currently without reality
The problem of OAM(Operation Administration Maintenance) of existing packet synchronization net.
An embodiment of the present invention provides a kind of OAM devices for realizing packet synchronization net, the frequency being applied in packet synchronization net
Rate synchronizes on the net, which includes：
Fault detection module, for the input and output failure of external clock, the input and output failure of line clock and port
Failure of removal is detected, when sending the failure detected to warning processing module or directly trigger the Frequency Synchronization net progress
Clock switches；
Performance detection module, the hardware performance for detecting the online clockwork of the Frequency Synchronization and the Frequency Synchronization net
Network performance, send the performance fault that detects to the warning processing module；
The warning processing module, for that will receive the failure from the fault detection module and/or come from institute
The performance fault for stating performance detection module carries out unified format conversion, and after reporting format conversion to the bussiness processing layer on upper layer
Warning information.
Preferably, described device further includes：Synchronous regime enquiry module, the inquiry request for receiving webmaster transmission, and
The operating status, network topology state, state handover event of the clockwork of the Frequency Synchronization net are provided according to the inquiry request
Or the warning information.
Preferably, described device further includes：Synchronization Status Message (SSM) module makes for being extended to SSM algorithms
With identified comprising clock, clock quality grade, clock pass through NE No., clock alarm instruction, be forbidden to use mark SSM association
It is synchronous with clock into row clock configuration to discuss message.
Preferably, described device further includes：Safety management module, for protocol massages are encrypted and flow every
From, and authentication vs. authorization is carried out for the legitimacy of time source or time synchronization client；Wherein, protocol massages include SSM associations
Discuss message and Precision Time Protocol (PTP) protocol massages.
Preferably, described device further includes：Notification module, for detecting the Frequency Synchronization net into row clock switching
Afterwards, the time synchronization network tranmitting data register handover information into the packet synchronization net；Alternatively, being detected in the fault detection module
After to failure or after the performance detection module detects performance fault, corresponding failure letter is sent to the time synchronization network
Breath.
Preferably, described device is applied on the clockwork in the Frequency Synchronization net.
The embodiment of the present invention additionally provides a kind of OAM devices for realizing packet synchronization net, is applied in packet synchronization net
Time synchronization is online, which includes：
Fault detection module, for global positioning system (GPS) module, Precision Time Protocol (PTP) message and interface
Fault detect is carried out, the clock switching of the failure detected or the triggering time synchronization network is sent to warning processing module；
Performance detection module synchronizes the net of the hardware performance and the time synchronization network of the node device of net for detection time
Network performance sends the performance fault detected to the warning processing module；
The warning processing module, for that will receive the failure from the fault detection module and/or come from institute
The performance fault for stating performance detection module carries out unified format conversion, and after reporting format conversion to the bussiness processing layer on upper layer
Warning information.
Preferably, described device further includes：Synchronous regime enquiry module, the inquiry request for receiving webmaster transmission, and
The operating status of the node device of the time synchronization network, the state of current different port and state is provided according to the inquiry request to cut
Change event, network topology state or the warning information.
Preferably, described device further includes：Link asymmetry detects automatically and compensating module, for the time synchronization
The synchronization link of net carries out automatic asymmetry compensation, and reports compensation result to the synchronous regime enquiry module.
Preferably, described device further includes：Time link topology discovery module, the inquiry for receiving webmaster transmission
The request of current time synchronous path information, and the current time synchronous path information obtained is provided according to the request.
Preferably, described device further includes：Best master clock (BMC) module, when for using PTP BMC algorithms to realize this
Between synchronous net time synchronization path；Safety management module, for protocol massages are encrypted and flow isolation, and
Authentication vs. authorization is carried out for the legitimacy of time source or time synchronization client；Wherein, protocol massages include BMC protocol message and
Precision Time Protocol (PTP) protocol massages.
Preferably, described device is applied on the node device in the time synchronization network.
The embodiment of the present invention provides a kind of Operation, Administration and Maintenance (OAM) method for realizing packet synchronization net, this point again
The synchronous net of group includes Frequency Synchronization net and the time synchronization network based on the Frequency Synchronization net, this method include：
The Frequency Synchronization net fails to the input and output failure of external clock, the input and output failure of line clock and port
Failure is detected, upon failure detection directly triggering clock switching；The hardware of the clockwork online to the Frequency Synchronization
Performance and network performance are detected；And the failure detected and/or performance fault report to after unifying format conversion
The bussiness processing layer on upper layer is handled；
The time synchronization network carries out global positioning system (GPS) module, Precision Time Protocol (PTP) message and interface
Fault detect, upon failure detection directly triggering clock switching；To the hardware performance and net of the node device of time synchronization network
Network performance is detected；And the failure detected and/or performance fault unify reporting to the industry on upper layer after format conversion
Business process layer is handled.
Preferably, the method further includes：The Frequency Synchronization net is detecting that the Frequency Synchronization net cuts into row clock
After changing, to the time synchronization network tranmitting data register handover information；Alternatively, upon failure detection or after performance fault, to described
Time synchronization network sends corresponding fault message.
Using the embodiment of the present invention, the Operations, Administration and Maintenance to packet synchronization net may be implemented so that operator can
Its packet synchronization net is easily managed, the maintainability and stability of packet synchronization net are greatly improved.
Description of the drawings
Fig. 1 is the functional frame composition of packet synchronization net embodiment of the present invention；
Fig. 2 is the structural schematic diagram for the OAM device embodiments one that the present invention realizes packet synchronization net；
Fig. 3 is the structural schematic diagram for the OAM device embodiments two that the present invention realizes packet synchronization net；
Fig. 4 is the configuration diagram of the synchronous net in carrier class grouping mobile backhaul net of the present invention.
Specific implementation mode
To make the objectives, technical solutions, and advantages of the present invention clearer, below in conjunction with attached drawing to the present invention
Embodiment be described in detail.It should be noted that in the absence of conflict, in the embodiment and embodiment in the application
Feature mutually can arbitrarily combine.
One most full packet synchronization net is divided into 2 layer networks：The Frequency Synchronization net and same based on the time thereon on basis
Walk net.From the perspective of management service, this 2 layers synchronous each have their own characteristic of net, each have their own OAM(Operation Administration Maintenance) demand, so OAM
Function needs layering to run from framework, i.e.,：The a set of OAM(Operation Administration Maintenance) collection of Frequency Synchronization network operation, time synchronization network operation are another set of
OAM(Operation Administration Maintenance) collection.Between this 2 layers of OAM(Operation Administration Maintenance) collection, there can be partial function coincidence.In addition, degrading, with timely in failure and performance
It is to need some interaction mechanisms when clock equipment or synchronizing network state change, as shown in Figure 1.
Frequency Synchronization net OAM(Operation Administration Maintenance) collection should include following function：Fault detect and report；Performance monitoring and report；It is synchronous
Status inquiry is generated with alarm；Grouped frequency, which synchronizes net Synchronization Status Message (SSM), enhances function；And safety management.
Illustrate above functions one by one below：
(1) fault detect and report
For Frequency Synchronization net, it may appear that failure and it is corresponding detection and report mechanism it is as follows：
External clock input/output fault：Include mainly global positioning system (GPS) external clock, 2M Hz external clocks, 2M
The input/output frequency dropout failure of bit/s external clocks, external clock alarm indicate and inhibit (AIS), frame loss (LOF)
Failure etc..These failures are detected and report webmaster or the directly synchronous net of triggering on the clockwork interface of direct-connected external clock
Switch；
Line clock input/output fault：Include mainly SDH line clocks, FE/GE line clocks, 1588 line clocks
Input/output frequency dropout failure, the input/output frequency signal error failure of line clock etc..When these failures
It is detected and report webmaster or directly triggering to synchronize switching for net on the line interface of clock equipment；
Port failure of removal：Either input/input port of external clock input/output end port or line clock, all
It is possible that the failure of failure, this clockwork should support it to detect and webmaster or directly triggering is reported to synchronize switching for net.
(2) performance detection and report
For Frequency Synchronization net, performance detection is very important OAM(Operation Administration Maintenance), main performance failure and its corresponding
Detection and report mechanism are as follows：
Constant-temperature crystal oscillator (OCXO) voltage-controlled voltage fluctuation is out-of-limit under crystal oscillator aging and temperature beyond limit, locking：These when
The performance fault of clock equipment own hardware level can be detected and upper-layer protocol process layer is notified to carry out subsequent processing；
Clock reference source frequency crosses the border, packet delay variation (PDV) network quality decline is out-of-limit：These belong to network performance event
Barrier, when certain clockwork detects that the network performance of upstream degrades, can carry out alarm notification upper-layer protocol process layer
Subsequent processing；
Performance statistics：Including the voltage-controlled voltage performance statistics of OCXO, PDV network performances statistics, real-time packet statistics etc..The work(
It can be supplied to the overall performance situation interior for the previous period that webmaster is checked at any time.
(3) synchronous regime is inquired
The OAM(Operation Administration Maintenance) collection is mainly used for each equipment running status that webmaster obtains Frequency Synchronization net in time.Main includes such as
Lower mechanism：
State handover event notifying mechanism：Switched including clock source, frequency phase lock ring status switching, synchronization link switching etc.
The detection and notice of event.
(4) alarming processing
The OAM(Operation Administration Maintenance) collection is mainly used for generating warning information after carrying out unified format conversion to the failure of appearance.Main packet
Include following mechanism：
Alarming mechanism：To all functional faults, performance fault and some special events to upper-layer service process layer
Notifying mechanism.
(5) grouped frequency, which synchronizes net SSM, enhances function
Existing SSM algorithms can realize the synchronization of grouped frequency well, but it there are two shortcomings：
A, cannot handle the problem of synchronised clock cyclization well, thus especially need in engineering and clock configuration when
Time is paid special attention to, and ensures the situation for avoiding the occurrence of clock cyclization；
B, the attenuation problem of frequency signal；With the increase of synchronization link number, the noise and temperature of synchronous assigning process become
Changing caused drift all can be such that the quality of timing reference signal gradually deteriorates, therefore actual on the same synchronization link
The number that network element can be synchronized is limited.But existing SSM algorithms can not the hop count of reference clock equipment carry out selecting source.
Pass through the appropriate extension to existing SSM algorithms so that include in SSM protocol massages：Clock mark, clock quality etc.
Grade, clock alarm instruction, is forbidden to use mark at the NE No. of clock process.Grouped frequency net is well solved with
Upper two problems.
(6) safety management
If synchronized using the grouped frequency that PTP message modes carry out, PTP timings stream of packets may need to cross over multiple nets
Network region, therefore the safety of timing stream of packets has to consider.The mode that can be taken has：
Message encryption, verification；
Flow is isolated：Flow is isolated by virtual LAN (vlan), or 1588 agreements being carried in LSP
(1588over LSP)；
It prevents client clock (Slave) to be connected to the master clock (Master) of mistake, prevents Master to unauthorized
Slave provides synchronous service etc.；
Time synchronization network OAM(Operation Administration Maintenance) collection should include following function：Fault detect and report, the notice of PTP BMC algorithm informations,
Performance monitoring and report (detection and filtering that include phase hit), synchronous regime inquiry and alarm generation, link asymmetry
Automatic detection and compensation, time link topology discovery mechanism and safety management.
Illustrate above functions one by one below：
(1) fault detect and report
For time synchronization network, it may appear that failure and it is corresponding detection and report mechanism it is as follows：
GPS dependent failures：The basic reference time source (PRTC) of time synchronization network or terminal device can directly connect
It meets GPS and obtains frequency and time signal, when GPS module thereon breaks down, for example dropout, signal are unavailable, mistake
Magnitude needs that webmaster or triggering is reported to synchronize switching for net in time；
PTP messages monitor and report：Including all event message (Sync, Delay_Req, Pdelay_Req, Pdelay_
Resp the loss for losing the general message (Announce, Follow_up, Delay_Resp etc.) out-of-limit, some are important) is out-of-limit
And the content mistake etc. of all PTP messages；
The failure and performance detection of 1PPS+ToD interfaces：1PPS+ToD is that very universal outside is used in time synchronization network
Interface can transmit frequency+time signal to equipment simultaneously, and the interface is if a failure occurs, it is necessary to timely processing；
(2) PTP BMC algorithm informations are noticed
PTP protocol calculates the current different ends of this equipment using BMC protocol algorithm in real time in each OC and BC equipment
The state of mouth and switching, including initialization (initializing), failure (faulty), disabled (go to enable),
Listening (monitoring), pre_master (pre- master port), master port (master), passive (passive port),
Uncalibrated (in advance from port) notifies webmaster and upper-layer service to handle in time from port (slave), and by these information
Layer.
(3) performance monitoring and report (detection and filtering that include phase hit)
For time synchronization network, performance monitoring is very important OAM(Operation Administration Maintenance), main performance failure and its corresponding
Detection and report mechanism are following (partial function is overlapped with the performance detection OAM(Operation Administration Maintenance) of Frequency Synchronization net)：
The voltage-controlled voltage fluctuations of OCXO are out-of-limit under crystal oscillator aging and temperature beyond limit, locking：These clockwork own hardware layers
The performance fault in face can be detected and upper-layer protocol process layer is notified to carry out subsequent processing；
Time reference source phase is crossed the border, the decline of PDV network qualities is out-of-limit：These belong to network performance failure, when certain
When clock equipment detects that the network performance of upstream degrades, can alarm notification upper-layer protocol process layer be subjected to subsequent processing；
Performance statistics：Including the voltage-controlled voltage performance statistics of OCXO, PDV network performances statistics, real-time packet statistics etc..The work(
It can be supplied to the overall performance situation interior for the previous period that webmaster is checked at any time；
Looped network time failure detects automatically and location mechanism：Ring-network topology is widely used in telecommunication network, utilizes it
The extension negotiation mechanism of special topology and some PTP messages, the time synchronization error that all nodes on looped network may be implemented are got over
The automatic detection and localization of fault of the failure of limit；
Phase hit testing mechanism：When change in topology occurs for synchronization link, phase hit will appear by synchronizer, examine
It surveys the saltus step and is smoothed or filtration treatment must be supported.
(4) synchronous regime is inquired
The OAM(Operation Administration Maintenance) collection is mainly used for each equipment running status that webmaster obtains time synchronization network in time.Main includes such as
Lower mechanism：
State handover event notifying mechanism：It is switched including time source, ancestral's clock (GrandMaster) switches, 1588 locking phases
The detection and notice of the events such as ring status switching, the switching of PTP equipment states.
(5) alarm generates
The OAM(Operation Administration Maintenance) collection is mainly used for the alarm after breaking down and generates and notice.Include mainly following mechanism：
Alarming mechanism：To all functional faults, performance fault and some special events to upper-layer service process layer
Notifying mechanism.
(6) link asymmetry is detected and is compensated automatically
For time synchronization, the asymmetry compensation of link is very important, it is necessary to be solved the problems, such as.Current
Common method is after carrying out point-by-point measurement by tester, then compensation by hand.Although this method realizes simple, consumption
When, it is laborious, cost is very high.Automatic compensation mechanism and the lower method of some costs are technically needed, is had at present as follows
Optional alternative solution：
Base station GPS directly measures asymmetry value and compensates；
Change fine automatic compensation scheme：It is divided into manual and automatic 2 kinds of modes；
Single fiber bi-directional scheme：It is of limited application；
The automatic detection scheme of looped network：Easy to maintain, but under some scenes, there are omission factors.
(7) time link topology discovery mechanism
Mainly a kind of on-demand Topology Discovery mechanism is realized a kind of by extending the protocol massages and interaction mechanism of PTP
Topology information exchanges and inquiry mechanism.For assisting webmaster to inquire current time synchronization routing information at any time, contribute to network
Planning and fault location.
(8) safety management
It is similar with the grouped frequency net that PTP modes are realized, it is synchronized using the packet time that PTP message modes carry out, PTP is fixed
When stream of packets may need cross over multiple network areas, therefore the safety of timing stream of packets have to consider.It can take
Mode have：
Message encryption, verification；
Flow is isolated：Flow or 1588over LSP is isolated by vlan；
It prevents Slave to be connected to the Master of mistake, prevents Master from providing synchronous service etc. to the Slave of unauthorized.
The 2 layers defined above synchronous respective OAM(Operation Administration Maintenance) collection of net, the interaction between being the need in some cases
Mechanism.Include mainly：
Frequency Synchronization net failure and performance, which degrade, is advertised to time synchronization network：The essence of the time synchronization of time synchronization network
Degree, stability are influenced by Frequency Synchronization net, when Frequency Synchronization net OAM mechanism finds that failure or performance degrade, it is necessary to
It notifies time synchronization network, it is made to be handled accordingly；
The variation of Frequency Synchronization net state is advertised to time synchronization network：This state includes the operating status of clockwork,
Including the state of Frequency Synchronization network topology variation, the variation of these states can all have an impact time synchronization network, such as
The protection switching of Frequency Synchronization net can cause time synchronization network a degree of phase hit etc. occur.So these situations of change
Time synchronization network must be all notified in time, it is made to be handled accordingly.
Using between a set of fairly perfect packet synchronization net OAM frameworks and function collection defined above and they
The Operations, Administration and Maintenance to packet synchronization net may be implemented in interaction mechanism so that operator can easily manage its grouping
Synchronous net, greatly improves the maintainability and stability of packet synchronization net.
In order to complete above-mentioned function well, an embodiment of the present invention provides a kind of operational managements for realizing packet synchronization net
With safeguard (OAM) device, be applied to packet synchronization net in Frequency Synchronization it is online, as shown in Fig. 2, the device includes fault detect
Module 21, performance detection module 22 and warning processing module 23, wherein：
Fault detection module, for the input and output failure of external clock, the input and output failure of line clock and port
Failure of removal is detected, when sending the failure detected to warning processing module or directly trigger the Frequency Synchronization net progress
Clock switches；
Performance detection module, the hardware performance for detecting the online clockwork of the Frequency Synchronization and the Frequency Synchronization net
Network performance, send the performance fault that detects to the warning processing module；
The warning processing module, for that will receive the failure from the fault detection module and/or come from institute
The performance fault for stating performance detection module carries out unified format conversion, and after reporting format conversion to the bussiness processing layer on upper layer
Warning information.
Wherein, which can also include：SSM modules 24, for being extended to SSM algorithms, using including clock mark
When knowledge, the NE No. of clock quality grade, clock process, clock alarm indicate, are forbidden to use that the SSM protocol massages of mark carry out
Clock configuration is synchronous with clock.The SSM modules can avoid the decaying of the problem and frequency signal of synchronised clock cyclization from asking well
Topic.
In addition, the device can also include：Safety management module 25, for protocol massages being encrypted and flow
Isolation, and authentication vs. authorization is carried out for the legitimacy of time source or time synchronization client；Wherein, protocol massages include SSM
Protocol massages and Precision Time Protocol (PTP) protocol massages.
Preferably, described device can also include：Synchronous regime enquiry module 26, the inquiry for receiving webmaster transmission are asked
It asks, and operating status, network topology state, the state switching of the clockwork of the Frequency Synchronization net is provided according to the inquiry request
Event or the warning information.
Further, described device can also include：Notification module 27, for detecting the Frequency Synchronization net progress
After clock switching, the time synchronization network tranmitting data register handover information into the packet synchronization net；Alternatively, in the fault detect
Module detects after failure or after the performance detection module detects performance fault, sends and corresponds to the time synchronization network
Fault message.Above-mentioned apparatus is exactly based on the interaction of notification module completion and time synchronization network.
Above-mentioned apparatus is applied on the clockwork in the Frequency Synchronization net.
Accordingly, in order to which above-mentioned function is better achieved, the embodiment of the present invention additionally provides a kind of realization packet synchronization net
OAM devices, be applied to packet synchronization net in time synchronization it is online, which includes fault detection module 31, performance detection
Module 32 and warning processing module 33, wherein：
Fault detection module, for carrying out fault detect to global positioning system (GPS) module, PTP messages and interface, to
Warning processing module sends the clock switching of the failure detected or the triggering time synchronization network；
Performance detection module synchronizes the net of the hardware performance and the time synchronization network of the node device of net for detection time
Network performance sends the performance fault detected to the warning processing module；
The warning processing module, for that will receive the failure from the fault detection module and/or come from institute
The performance fault for stating performance detection module carries out unified format conversion, and after reporting format conversion to the bussiness processing layer on upper layer
Warning information.
Wherein, described device further includes：Best master clock (BMC) module 34, for using point-to-point (PTP) BMC algorithms
Realize the time synchronization path of the time synchronization network；Safety management module 35, for being encrypted and flowing to protocol massages
Amount isolation, and authentication vs. authorization is carried out for the legitimacy of time source or time synchronization client；Wherein, protocol massages include
BMC protocol message and Precision Time Protocol (PTP) protocol massages.Above-mentioned BMC module is using the prior art.
In addition, described device can also include：Synchronous regime enquiry module 36, the inquiry for receiving webmaster transmission are asked
Ask, and provided according to the inquiry request operating status of node device of the time synchronization network, the state of current different port and
State handover event, network topology state or the warning information.
Further, described device further includes：Link asymmetry automatically open up by detection and compensating module 37 or time link
Flutter topology discovery module 38；The link asymmetry detects automatically and compensating module, for the synchronization chain to the time synchronization network
Road carries out automatic asymmetry compensation, and reports compensation result to the synchronous regime enquiry module.The time link topology knot
Structure discovery module, the request of the inquiry current time synchronous path information for receiving webmaster transmission, and provided according to the request
The current time synchronous path information of acquisition.
Above-mentioned apparatus is applied on the node device in the time synchronization network.
OAM methods applied to the realization packet synchronization network on above-mentioned packet synchronization network include：
Step 1: the Frequency Synchronization net to the input and output failure of external clock, the input and output failure of line clock and
Port failure of removal is detected, upon failure detection directly triggering clock switching；The clock online to the Frequency Synchronization is set
Standby hardware performance and network performance is detected；And the failure detected and/or performance fault are subjected to unified format conversion
The bussiness processing layer for reporting to upper layer afterwards is handled；
Step 2: the time synchronization network carries out failure inspection to global positioning system (GPS) module, PTP messages and interface
It surveys, upon failure detection directly triggering clock switching；To the hardware performance and network performance of the node device of time synchronization network
It is detected；And the failure detected and/or performance fault unify reporting to the business processing on upper layer after format conversion
Layer is handled.
In addition, have some interactions between the Frequency Synchronization net and time synchronization network, such as the Frequency Synchronization net is being examined
Measure the Frequency Synchronization net into row clock switch after, to the time synchronization network tranmitting data register handover information；Alternatively, detecting
After to failure or after performance fault, corresponding fault message is sent to the time synchronization network.
In short, the Operations, Administration and Maintenance to packet synchronization net may be implemented in the above method so that operator can facilitate
Ground manages its packet synchronization net, greatly improves the maintainability and stability of packet synchronization net.
Embodiment
Fig. 2 is the Organization Chart of the synchronous net in a typical carrier class grouping mobile backhaul net, wherein same comprising frequency
Walk net and time synchronization network.
It, can be in real time on each clockwork of Frequency Synchronization net or the clockwork of some key positions
Either desirably run one or several functions that following OAM(Operation Administration Maintenance) is concentrated：
Fault detect and report；
Performance monitoring and report；
Synchronous regime is inquired to be generated with alarm；
Grouped frequency, which synchronizes net SSM, enhances function；
Safety management.
Time synchronization network is by various types of PTP nodes (including OC, BC, TC etc.) equipment, or general load bearing equipment structure
At.It, can be in real time on each PTP node devices of time synchronization network or the PTP node devices of some key positions
Either desirably run one or several functions that following OAM(Operation Administration Maintenance) is concentrated：
Fault detect and report；
PTP BMC algorithm informations are noticed；
Performance monitoring and report (detection and filtering that include phase hit)；
Synchronous regime is inquired to be generated with alarm；
Link asymmetry detection and compensation automatically；
Time link topology discovery mechanism；
Safety management.
There can be partial function coincidence between this 2 layers of OAM(Operation Administration Maintenance) collection.In addition, degrading in failure and performance and clock is set
It is to need some interaction mechanisms when standby or synchronizing network state change.
In conclusion according to the abovementioned embodiments of the present invention, providing a set of fairly perfect packet synchronization net OAM frameworks
With function collection and the interaction mechanism between them, the Operations, Administration and Maintenance to packet synchronization net may be implemented.So that fortune
Battalion quotient can easily manage its packet synchronization net, greatly improve the maintainability and stability of packet synchronization net.
Obviously, those skilled in the art should be understood that each module of the above invention or each step can be with general
Computing device realize that they can be concentrated on a single computing device, or be distributed in multiple computing devices and formed
Network on, optionally, they can be realized with the program code that computing device can perform, it is thus possible to which they are stored
Be performed by computing device in the storage device, either they are fabricated to each integrated circuit modules or by they
In multiple modules or step be fabricated to single integrated circuit module to realize.In this way, the present invention is not limited to any specific
Hardware and software combines.
The above examples are only used to illustrate the technical scheme of the present invention and are not limiting, reference only to preferred embodiment to this hair
It is bright to be described in detail.It will be understood by those of ordinary skill in the art that can modify to technical scheme of the present invention
Or equivalent replacement should all cover the claim model in the present invention without departing from the spirit of the technical scheme of the invention and range
In enclosing.
Claims (14)
1. a kind of Operation, Administration and Maintenance OAM devices for realizing packet synchronization net, the Frequency Synchronization being applied in packet synchronization net
On the net, which is characterized in that the device includes：
Fault detection module, for failing to the input and output failure of external clock, the input and output failure of line clock and port
Failure is detected, and is sent the failure detected to warning processing module or is directly triggered the Frequency Synchronization net and is cut into row clock
It changes；
Performance detection module, the net of hardware performance and the Frequency Synchronization net for detecting the online clockwork of the Frequency Synchronization
Network performance sends the performance fault detected to the warning processing module；
The warning processing module, for that will receive the failure from the fault detection module and/or come from the property
Can the performance fault of detection module carry out unified format conversion, and the alarm after reporting format conversion to the bussiness processing layer on upper layer
Information.
2. the apparatus according to claim 1, which is characterized in that described device further includes：
Synchronous regime enquiry module, the inquiry request for receiving webmaster transmission, and it is same according to the inquiry request to provide the frequency
Walk operating status, network topology state, state handover event or the warning information of the clockwork of net.
3. the apparatus according to claim 1, which is characterized in that described device further includes：
Synchronization Status Message SSM modules, for being extended to SSM algorithms, using identified comprising clock, clock quality grade,
The NE No. of clock process, clock alarm indicate, are forbidden to use that the SSM protocol massages of mark are same into row clock configuration and clock
Step.
4. the apparatus according to claim 1, which is characterized in that described device further includes：
Safety management module, it is and same for time source or time for protocol massages being encrypted and flow isolation
The legitimacy for walking client carries out authentication vs. authorization；Wherein, protocol massages include SSM protocol massages and Precision Time Protocol PTP associations
Discuss message.
5. the apparatus according to claim 1, which is characterized in that described device further includes：
Notification module, for detect the Frequency Synchronization net into row clock switch after, into the packet synchronization net when
Between synchronous net tranmitting data register handover information；Alternatively, after the fault detection module detects failure or in the performance detection
After module detects performance fault, corresponding fault message is sent to the time synchronization network.
6. according to the device described in claim 1-5 any claims, it is characterised in that：
Described device is applied on the clockwork in the Frequency Synchronization net.
7. a kind of Operation, Administration and Maintenance OAM devices for realizing packet synchronization net, the time synchronization being applied in packet synchronization net
On the net, which is characterized in that the device includes：
Fault detection module, for carrying out failure to global position system GPS module, Precision Time Protocol PTP messages and interface
Detection sends the clock switching of the failure detected or the triggering time synchronization network to warning processing module；
Performance detection module synchronizes the internetworking of the hardware performance and the time synchronization network of the node device of net for detection time
Can, the performance fault detected is sent to the warning processing module；
The warning processing module, for that will receive the failure from the fault detection module and/or come from the property
Can the performance fault of detection module carry out unified format conversion, and the alarm after reporting format conversion to the bussiness processing layer on upper layer
Information.
8. device according to claim 7, which is characterized in that described device further includes：
Synchronous regime enquiry module, the inquiry request for receiving webmaster transmission, and it is same according to the inquiry request to provide the time
Walk the operating status of node device, the state of current different port and the state handover event of net, network topology state or described
Warning information.
9. device according to claim 8, which is characterized in that described device further includes：
Detection and compensating module, the synchronization link progress being used for the time synchronization network are automatic asymmetric automatically for link asymmetry
Property compensation, and report compensation result to the synchronous regime enquiry module.
10. device according to claim 7, which is characterized in that described device further includes：
Time link topology discovery module, the inquiry current time synchronous path information for receiving webmaster transmission are asked
It asks, and the current time synchronous path information obtained is provided according to the request.
11. device according to claim 7, which is characterized in that described device further includes：
Best master clock BMC module, the time synchronization path for realizing the time synchronization network using PTP BMC algorithms；
Safety management module, it is and same for time source or time for protocol massages being encrypted and flow isolation
The legitimacy for walking client carries out authentication vs. authorization；Wherein, protocol massages include BMC protocol message and Precision Time Protocol PTP associations
Discuss message.
12. according to the device described in claim 7-11 any claims, it is characterised in that：
Described device is applied on the node device in the time synchronization network.
13. a kind of Operation, Administration and Maintenance OAM methods for realizing packet synchronization net, the packet synchronization net include Frequency Synchronization net and
Time synchronization network based on the Frequency Synchronization net, which is characterized in that this method includes：
The Frequency Synchronization net is to the input and output failure of external clock, the input and output failure of line clock and port failure of removal
It is detected, upon failure detection directly triggering clock switching；The hardware performance of the clockwork online to the Frequency Synchronization
It is detected with network performance；And the failure detected and/or performance fault are carried out to report to upper layer after unifying format conversion
Bussiness processing layer handled；
The time synchronization network carries out failure inspection to global position system GPS module, Precision Time Protocol PTP messages and interface
It surveys, upon failure detection directly triggering clock switching；To the hardware performance and network performance of the node device of time synchronization network
It is detected；And the failure detected and/or performance fault unify reporting to the business processing on upper layer after format conversion
Layer is handled.
14. according to the method for claim 13, which is characterized in that the method further includes：
The Frequency Synchronization net is after detecting that the Frequency Synchronization net switches into row clock, when being sent to the time synchronization network
Clock handover information；Alternatively, upon failure detection or after performance fault, corresponding failure letter is sent to the time synchronization network
Breath.
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| CN103825776B (en) * | 2014-02-11 | 2017-02-01 | 烽火通信科技股份有限公司 | OAM package sending automatic detection apparatus and method |
| CN106330506B (en) * | 2015-06-29 | 2019-08-16 | 华为技术有限公司 | A service fault location method and device |
| CN107086959B (en) * | 2016-02-16 | 2020-11-06 | 华为技术有限公司 | Method and device for authentication of operation management and maintenance messages |
| CN107465475A (en) * | 2016-06-06 | 2017-12-12 | 中兴通讯股份有限公司 | A kind of network equipment clock/time detecting method and apparatus |
| CN108540379A (en) * | 2018-04-19 | 2018-09-14 | 南方电网科学研究院有限责任公司 | IEEE 1588V 2-based time synchronization fault switching method, time synchronization device and system |
| CN109305046A (en) * | 2018-09-30 | 2019-02-05 | 湖南中车时代通信信号有限公司 | The transmission control system and method for train traction location data |
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