CN104363530B - A kind of apparatus and method of Synchronization Status Message extraction - Google Patents
A kind of apparatus and method of Synchronization Status Message extraction Download PDFInfo
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- CN104363530B CN104363530B CN201410597222.6A CN201410597222A CN104363530B CN 104363530 B CN104363530 B CN 104363530B CN 201410597222 A CN201410597222 A CN 201410597222A CN 104363530 B CN104363530 B CN 104363530B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04J—MULTIPLEX COMMUNICATION
- H04J3/00—Time-division multiplex systems
- H04J3/02—Details
- H04J3/06—Synchronising arrangements
- H04J3/0635—Clock or time synchronisation in a network
- H04J3/0638—Clock or time synchronisation among nodes; Internode synchronisation
- H04J3/0647—Synchronisation among TDM nodes
- H04J3/065—Synchronisation among TDM nodes using timestamps
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Abstract
A kind of apparatus and method of Synchronization Status Message extraction, it is related to optics transport network technology field, the device includes OTUk input processing units, OSC input processing units, time synchronizing unit, frequency abstraction unit, clock synchronization process unit, OTUk output processing units and OSC output processing units.The present invention by by the time and clock synchronization information of OTUk signals and osc signal transmission it is interrelated, the time synchronized for not only realizing OTUk signals and osc signal is associated, also achieve OTUk signals to associate with the clock synchronization information of osc signal, this improves the robustness of synchronization system.
Description
Technical field
The present invention relates to optics transport network technology field, is specifically device and side that a kind of Synchronization Status Message extracts
Method.
Background technology
3G/4G and LTE base station have very high requirement to the clock between base station and time synchronized, the OTN to face the future
(Optical Transport Network, optical transfer network) network needs the high-precise synchronization requirement for meeting carrier class.Exist at present
In OTN networks, wherein time synchronized can be by 1588V2 agreements in OTUk (Completely standardized
Optical Channel Transport Unit-k, light-path delivery unit-k is standardized completely) electric layer carries and OSC
Sync message is transmitted in the expense of (Optical Supervisory Channel, Optical Supervisory Channel), clock can synchronously use
Transmitted in OTUk physical layers or OSC passages.But due to both in current OTN equipment it is substantially independent, cause occurring
During failure, each self-dependent system carries out the holding of time or clock, therefore robustness is poor.
The content of the invention
For defect present in prior art, it is an object of the invention to provide a kind of dress of Synchronization Status Message extraction
Put and method, improve the robustness of synchronization system.
To achieve the above objectives, the present invention adopts the technical scheme that：A kind of device of Synchronization Status Message extraction, including
OTUk input processing units, extract OTUk clock sync signals and OTUk time synchronizing signals respectively from OTUk signals；OSC is defeated
Enter processing unit, extract OSC clock sync signals and OSC time synchronizing signals respectively from osc signal；Time synchronizing list
Member, OTUk time synchronizing signals and OSC time synchronizing signals are received, select optimal time synchronously to believe according to Synchronization Status Message
Number, and it is respectively sent to OTUk output units and OSC output processing units；Frequency abstraction unit, it is same that it is attached to the time
Processing unit is walked, optimal clock synchronizing signal is extracted from the PTP messages being encapsulated in OTUk signals or in osc signal, by it
Send to clock synchronization process unit；Clock synchronization process unit, receive OTUk clock sync signals, OSC clock sync signals
And the optimal clock synchronizing signal that frequency abstraction unit is sent, therefrom selected optimal clock synchronously to believe according to Synchronization Status Message
Number, and it is respectively sent to time synchronizing unit, OTUk output units and OSC output processing units；At OTUk outputs
Unit is managed, optimal clock sync signal and the optimal time synchronizing signal of reception is downstream exported as output signal；OSC is defeated
Go out processing unit, optimal clock sync signal and the optimal time synchronizing signal of reception is downstream exported as output signal.
On the basis of above-mentioned technical proposal, the OTUk signals include the band internal planes OTUk expense encapsulation 1588V2 times
The time synchronizing signal of stamp, and the clock sync signal of OTUk physical layers transmission；The osc signal is included with outer OSC expenses
The 1588V2 time synchronizing signals of transmission, and OSC physical layers or the clock sync signal of OSC passages transmission.
The present invention also provides a kind of method of the Synchronization Status Message extraction based on said apparatus, comprises the following steps：Step
Rapid S1.OTUk input processing units extract OTUk clock sync signals and OTUk time synchronizing signals respectively from OTUk signals；
OSC input processing units extract OSC clock sync signals and OSC time synchronizing signals respectively from osc signal；Step S2. frequencies
Rate extraction unit extracts optimal clock synchronizing signal from the PTP messages being encapsulated in OTUk signals or in osc signal, is sent out
Deliver to clock synchronization process unit；It is synchronous that step S3. clock synchronization process unit receives OTUk clock sync signals, OSC clocks
The optimal clock synchronizing signal that signal and frequency abstraction unit are sent, therefrom selected optimal clock synchronous according to Synchronization Status Message
Signal, and it is respectively sent to time synchronizing unit, OTUk output units and OSC output processing units；During step S4.
Between synchronous processing unit receive OTUk time synchronizing signals and OSC time synchronizing signals, selected according to Synchronization Status Message optimal
Time synchronizing signal, and it is respectively sent to OTUk output units and OSC output processing units；At step S5.OTUk outputs
Unit is managed with OSC outputs processing unit respectively using optimal clock sync signal and the optimal time synchronizing signal of reception as output
Signal downstream exports.
On the basis of above-mentioned technical proposal, step S2 specifically includes following steps：Step S201. frequency abstraction units
Slave ports pass through PTP Receive message timestamps；Step S202. carries out best master clock algorithm calculating to the timestamp of acquisition
Obtain optimal clock synchronizing signal；Step S203. sends optimal clock synchronizing signal to clock synchronization process unit.
It is described to select optimal clock synchronous according to Synchronization Status Message in step S3 on the basis of above-mentioned technical proposal
Signal, specifically include following steps：Step S301. judges whether OTUk clock sync signals are normal, if so, jumping to step
S302；If it is not, jump to step S305；Step S302. judges whether OSC clock sync signals are normal, if so, jumping to step
S303；If it is not, jump to step S304；Step S303. chooses OSC clock sync signals as optimal clock sync signal；Step
Rapid S304. chooses OTUk clock sync signals as optimal clock sync signal, while Synchronization Status Message corresponding to inserting etc.
Simultaneously passage time synchronous processing unit is packaged level；Step S305. judges whether OSC clock sync signals are normal, if so, jumping
Go to step S306；If it is not, jump to step S307；It is synchronous as optimal clock that step S306. chooses OSC clock sync signals
Signal, while simultaneously passage time synchronous processing unit is packaged Synchronization Status Message grade corresponding to insertion；Step S307. is selected
The clock sync signal that frequency abstraction unit is sent is taken as optimal clock sync signal, while synchronous regime is believed corresponding to insertion
Simultaneously passage time synchronous processing unit is packaged breath grade.
On the basis of above-mentioned technical proposal, the Synchronization Status Message grade is by expanding Synchronization Status Message
Obtain, specifically define synchronous regime letter using preceding 4 bits in the reserve bytes of the row the 14th of Synchronization Status Message the 1st row
Cease class information.
On the basis of above-mentioned technical proposal, when OTUk clock sync signals, OSC time synchronizing signals are unavailable or matter
When amount deterioration is less than reference clock/SSU_A/QL-ST2/SSU_B/QL-ST3E, then when judging OTUk clock sync signals, the OSC
Between synchronizing signal it is abnormal；No person, normally.
It is described to select optimal time synchronous according to Synchronization Status Message in step S4 on the basis of above-mentioned technical proposal
Signal, specifically include following steps：Step S401. judges whether OTUk time synchronizing signals are normal, if so, jumping to step
S402；If it is not, jump to step S405；Step S402. judges whether OSC time synchronizing signals are normal, if so, jumping to step
S403；If it is not, jump to step S404；Step S403. chooses OSC time synchronizing signals as optimal time synchronizing signal；Step
Rapid S404. chooses OTUk time synchronizing signals as optimal time synchronizing signal, and passage time synchronous processing unit is sealed
Dress；Step S405. judges whether OSC time synchronizing signals are normal, if so, jumping to step S406；If it is not, jump to step
S407；Step S406. chooses OSC time synchronizing signals as optimal time synchronizing signal, and passage time synchronous processing unit
It is packaged；The optimal clock sync signal that step S407. is sent by clock processing unit, which obtains optimal time, synchronously to be believed
Number, and passage time synchronous processing unit is packaged.
On the basis of above-mentioned technical proposal, the passage time synchronous processing unit, which is packaged, specifically includes following step
Suddenly：Step A. completes the encapsulation to PTP messages using general frame forming processing；It is net that PTP message informations are encapsulated into client by step B.
Lotus region, and close to PTP messages encapsulate 4 bytes check information；Step C. holds packaged general frame forming processing information
It is downloaded in OTN expenses.
The beneficial effects of the present invention are：
1st, the present invention by by the time and clock synchronization information of OTUk signals and osc signal transmission it is interrelated, not only
The time synchronized for realizing OTUk signals and osc signal is associated, and the clock for also achieving OTUk signals and osc signal is synchronous
Information association, this improves the robustness of synchronization system.
2nd, the present invention is by by Synchronization Status Message and PTP (Precision Time Protocol, exact time synchronization
Agreement) information is associated, and solves, when clock synchronously deteriorates, synchronously to keep clock by PTP messages, and it is same in the time
During step deterioration, the time is kept using optimal clock sync signal, so as to which the robustness of synchronization system be greatly improved.
Brief description of the drawings
Fig. 1 is the schematic diagram of the device that Synchronization Status Message extracts in the embodiment of the present invention；
Fig. 2 is that the schematic diagram being packaged to PTP messages is handled using general frame forming；
Fig. 3 is the schematic diagram of payload head type definition in Fig. 2；
Fig. 4 is the schematic diagram of OTN expenses in the embodiment of the present invention.
Embodiment
The present invention is described in further detail below in conjunction with drawings and Examples.
It is shown in Figure 1, a kind of device of Synchronization Status Message extraction, including OTUk input processing units, believe from OTUk
OTUk clock sync signals and OTUk time synchronizing signals are extracted in number respectively；OSC input processing units, divide from osc signal
Indescribably take OSC clock sync signals and OSC time synchronizing signals；Time synchronizing unit, receive OTUk time synchronizing signals
And OSC time synchronizing signals, optimal time synchronizing signal is selected according to Synchronization Status Message, and it is defeated to be respectively sent to OTUk
Go out unit and OSC output processing units, the optimal time synchronizing signal is that OTUk time synchronizing signals and OSC time synchronizeds are believed
Preferred time synchronizing signal in number；Frequency abstraction unit, it is attached to time synchronizing unit, from being encapsulated in OTUk signals
In or osc signal in PTP messages in extract optimal clock synchronizing signal, send it to clock synchronization process unit；Clock
Synchronous processing unit, receive the optimal clock that OTUk clock sync signals, OSC clock sync signals and frequency abstraction unit are sent
Synchronizing signal, optimal clock sync signal is therefrom selected according to Synchronization Status Message, and be respectively sent at time synchronized
Manage unit, OTUk output units and OSC output processing unit, the optimal clock sync signal be OTUk clock sync signals,
Preferred clock sync signal in OSC clock sync signals, optimal clock synchronizing signal.OTUk exports processing unit, will receive
Optimal clock sync signal and optimal time synchronizing signal downstream exported as output signal；OSC exports processing unit, will
Optimal clock sync signal and the optimal time synchronizing signal received downstream exports as output signal.In the present embodiment, institute
Stating OTUk signals includes the time synchronizing signal with internal planes OTUk expenses encapsulation 1588V2 timestamps, and the transmission of OTUk physical layers
Clock sync signal；The osc signal is included with the 1588V2 time synchronizing signals transmitted in outer OSC expenses, and OSC physics
Layer or the clock sync signal of OSC passages transmission.
It is shown in Figure 1, the method for the Synchronization Status Message extraction based on said apparatus, comprise the following steps：
Step S1.OTUk input processing units extract OTUk clock sync signals and OTUk times respectively from OTUk signals
Synchronizing signal；OSC input processing units extract OSC clock sync signals and OSC time synchronizing signals respectively from osc signal；
When step S2. frequency abstractions unit extracts optimal from the PTP messages being encapsulated in OTUk signals or in osc signal
Clock synchronizing signal, send it to clock synchronization process unit；
Preferably, step S2 specifically includes following steps：
By PTP Receive messages t1, t2, t3, t4, (IEEE1588 is assisted for the Slave ports of step S201. frequency abstraction units
Four variables defined in view, for representing the temporal information of record) timestamp；Step S202. is to the t1 of acquisition, t2, t3, t4
Timestamp carries out BMC (Best Master Clock, best master clock algorithm) and calculates acquisition optimal clock synchronizing signal；
Step S203. sends optimal clock synchronizing signal to clock synchronization process unit.
Step S3. clock synchronization process unit receives OTUk clock sync signals, OSC clock sync signals and frequency abstraction
The optimal clock synchronizing signal that unit is sent, therefrom selects optimal clock sync signal according to Synchronization Status Message, and by its point
Do not send to time synchronizing unit, OTUk output units and OSC and export processing unit.
Preferably, it is described that optimal clock sync signal is selected according to Synchronization Status Message in step S3, specifically include following
Step：
Step S301. judges whether OTUk clock sync signals are normal, if so, jumping to step S302；If it is not, jump to
Step S305；
Step S302. judges whether OSC clock sync signals are normal, if so, jumping to step S303；If it is not, jump to
Step S304；
Step S303. chooses OSC clock sync signals as optimal clock sync signal；
It is synchronous as optimal clock sync signal, while corresponding to insertion that step S304. chooses OTUk clock sync signals
Simultaneously passage time synchronous processing unit is packaged status information grade；
Step S305. judges whether OSC clock sync signals are normal, if so, jumping to step S306；If it is not, jump to
Step S307；
Step S306. chooses OSC clock sync signals as optimal clock sync signal, while synchronous shape corresponding to inserting
Simultaneously passage time synchronous processing unit is packaged state message level；
The clock sync signal that step S307. selecting frequencies extraction unit is sent is as optimal clock sync signal, simultaneously
Simultaneously passage time synchronous processing unit is packaged Synchronization Status Message grade corresponding to insertion.
Wherein, when OTUk clock sync signals, OSC time synchronizing signals are unavailable or quality deterioration less than reference clock/
During SSU_A/QL-ST2/SSU_B/QL-ST3E, then judge that the OTUk clock sync signals, OSC time synchronizing signals are abnormal；
No person, normally.
Table 1：Synchronization Status Message grade
Ginseng is shown in Table 1, and the four of SSM (Synchronization Status Message, Synchronization Status Message) codings
Individual bit can correspond to 16 kinds of frequency states, and synchronizing quality grade is divided into 7 grades, and Frequency Synchronization quality is represented not with 0000
Know, represent that the frequency quality that receives meets the reference clock frequency requirement of G.811 specification with 0001, the frequency that receives is represented with 0010
Quality meets 2 grades of nodal clock SSU_A/QL-ST2 requirements of G.812 specification, meets rule with 0011 frequency quality for representing to receive
3 grades of nodal clock SSU_B/QL-ST3E requirement of model, represent that load bearing equipment clock meets G.813/G.8262 specification with 0100
It is required that represent that frequency clock is unavailable with 0101, represent that frequency clock quality deteriorates with 0110, when less than reference clock/
SSU_A/QL-ST2/SSU_B/QL-ST3E using the PTP message informations that PTP protocol provides to frequency information, it is necessary to be carried out extensive
Multiple, other are encoded to reserved.
Synchronization Status Message grade corresponding to insertion is by the synchronous shape to OTN system in optimal clock sync signal
State information carries out new definition, and is encapsulated into what is realized in OTN expenses.1 to 7 row of the 1st row that OTN overhead bytes define are frames
Whether alignment overhead byte information, align for judgment frame；1st to the 4th row, the 15th to the 16th row are OPUk Overhead, the 2nd
The the 1st to the 14th row to the 4th row are ODUk overhead bytes, the expense for OTUk of the 8 to 14th row definition of the first row, wherein the
8 to 10 row of a line are section layer Overhead, and the 11 to 12nd of the first row arranges for depositing GCC0 (OTUk general
Communication channel 0, OTUk all purpose communication passage 0) information；2 last son sections are reserved undefined word
Section, the present embodiment define synchronous regime class information using preceding 4 bits in the row reserve bytes of the first row the 14th, pass SSM
Message.
Step S4. time synchronizings unit receives OTUk time synchronizing signals and OSC time synchronizing signals, according to synchronization
Status information selects optimal time synchronizing signal, and is respectively sent to OTUk output units and OSC output processing units；
Preferably, it is described that optimal time synchronizing signal is selected according to Synchronization Status Message in step S4, specifically include following
Step：
Step S401. judges whether OTUk time synchronizing signals are normal, if so, jumping to step S402；If it is not, jump to
Step S405；
Step S402. judges whether OSC time synchronizing signals are normal, if so, jumping to step S403；If it is not, jump to
Step S404；
Step S403. chooses OSC time synchronizing signals as optimal time synchronizing signal；
Step S404. chooses OTUk time synchronizing signals as optimal time synchronizing signal, and passage time synchronization process
Unit is packaged；
Step S405. judges whether OSC time synchronizing signals are normal, if so, jumping to step S406；If it is not, jump to
Step S407；
Step S406. chooses OSC time synchronizing signals as optimal time synchronizing signal, and passage time synchronization process list
Member is packaged；
The optimal clock sync signal that step S407. is sent by clock processing unit carries out time holding, and passes through
Time synchronizing unit is packaged.
Step S5.OTUk exports processing unit and exports processing unit respectively by the optimal clock sync signal of reception with OSC
And optimal time synchronizing signal downstream exports as output signal.
The passage time synchronous processing unit, which is packaged, specifically includes following steps：
Step A. is completed to PTP messages using GFP (generic framing procedure, general frame forming processing)
Encapsulation；
PTP message informations are encapsulated into client's payload area by step B., and the school of 4 bytes is finally encapsulated close to PTP messages
Test information (pFCS)；
Packaged GFP information is carried in OTN electric layer expenses by step C..It is shown in Figure 4, OTN overhead byte
Whether 1 to 7 row of the 1st row of definition are frame alignment overhead byte informations, alignd for judgment frame；1st to the 4th row, the 15th arrives
16th row are OPUk Overhead, and the 1st to the 14th row of the 2nd to the 4th row are ODUk overhead bytes, the 8 to 14th row of the first row
8 to 10 row of the expense for OTUk of definition, wherein the first row are section layer Overhead, and the 11 to 12nd of the first row arranges for depositing
Put GCC0 (OTUk general communication channel 0, OTUk all purpose communications passage 0) information；Last 2
Son section is reserved undefined byte, and the present embodiment passes the packaged PTP messages of GFP using the reserve bytes of the 1st row the 13rd row.
Shown in Figure 2, gfp frame structure is viewed from above, and the 1st byte to the 4th son section is core head, is routinely handled；
From the 5th to the 8th byte, totally 4 bytes are payload head region, and each byte specific definition of payload head is as shown in figure 3, the 5th byte packet contains
3 category informations, respectively payload type are specified, and (PTI) accounts for 3 bits, payload frame check sequence instruction (PFI) accounts for 1 bit
Position, extension header instruction (EXI) account for 4 bits.
Table 2：PTI functions define
| Bit<15:13> | Function |
| 000 | User data |
| 100 | Customer account management |
| 101 | Management communication |
| Other | Retain |
Ginseng is shown in Table 2, and works as PTI=000, represents user data, and PTI=100 represents user management frame, PTI=101 tables
Show management communication frame.PTI=000 is set in the present embodiment, represent to fill in step 4 for user data.PFI=1 represents net
Lotus check field has data, and PTI=0 represents payload check field no data, PFI=1 is set in the present embodiment.
Table 3：GFP extension header instruction EXI implications
Ginseng is shown in Table 3, and EXI has three class values, and EXI=0000 represents empty extension header, and EXI=0001 is expressed as linearly
Frame, EXI=0010 are expressed as annular frame, and other are reservation.EXI=0001 is set in the present embodiment.GFP the 6th each byte is
User's payload indicates (UPI) byte information, belongs to a part for payload head.
It is shown in Figure 3, because PTP message informations are not defined in GFP, current embodiment require that carrying out new expansion to it
Exhibition, Type bits are newly increased using UPI undefined byte<7:0>=0,001 0110, to indicate that the information of carrying is PTP reports
Literary information.
Table 4：UPI extension
Ginseng is shown in Table 4.The data that encapsulation is represented by newly defining UPI=00010110 are PTP time synchronization informations.
The present invention is not limited to the above-described embodiments, for those skilled in the art, is not departing from
On the premise of the principle of the invention, some improvements and modifications can also be made, these improvements and modifications are also considered as the protection of the present invention
Within the scope of.The content not being described in detail in this specification belongs to prior art known to professional and technical personnel in the field.
Claims (9)
- A kind of 1. device of Synchronization Status Message extraction, it is characterised in that：IncludingOTUk input processing units, extract OTUk clock sync signals and OTUk time synchronizing signals respectively from OTUk signals；OSC input processing units, extract OSC clock sync signals and OSC time synchronizing signals respectively from osc signal；Time synchronizing unit, OTUk time synchronizing signals and OSC time synchronizing signals are received, is selected according to Synchronization Status Message Optimal time synchronizing signal is selected, and is respectively sent to OTUk output units and OSC output processing units；Frequency abstraction unit, it is attached to time synchronizing unit, from the PTP being encapsulated in OTUk signals or in osc signal Optimal clock synchronizing signal is extracted in message, sends it to clock synchronization process unit；Clock synchronization process unit, receive what OTUk clock sync signals, OSC clock sync signals and frequency abstraction unit were sent When optimal clock synchronizing signal, optimal clock sync signal is therefrom selected according to Synchronization Status Message, and being respectively sent to Between synchronous processing unit, OTUk output units and OSC output processing unit；OTUk export processing unit, using optimal clock sync signal and the optimal time synchronizing signal of reception as output signal to Downstream exports；OSC export processing unit, using optimal clock sync signal and the optimal time synchronizing signal of reception as output signal to Downstream exports.
- 2. the device of Synchronization Status Message extraction as claimed in claim 1, it is characterised in that：The OTUk signals are included in band Electric layer OTUk expenses encapsulate the time synchronizing signal of 1588V2 timestamps, and the clock sync signal of OTUk physical layers transmission；Institute Stating osc signal is included with the 1588V2 time synchronizing signals transmitted in outer OSC expenses, and OSC physical layers or the transmission of OSC passages Clock sync signal.
- 3. the method for the Synchronization Status Message extraction based on claim 1 described device, it is characterised in that comprise the following steps：Step S1.OTUk input processing units extract OTUk clock sync signals and OTUk time synchronizeds respectively from OTUk signals Signal；OSC input processing units extract OSC clock sync signals and OSC time synchronizing signals respectively from osc signal；It is same that step S2. frequency abstractions unit extracts optimal clock from the PTP messages being encapsulated in OTUk signals or in osc signal Signal is walked, sends it to clock synchronization process unit；Step S3. clock synchronization process unit receives OTUk clock sync signals, OSC clock sync signals and frequency abstraction unit The optimal clock synchronizing signal of transmission, optimal clock sync signal is therefrom selected according to Synchronization Status Message, and it is sent out respectively Deliver to time synchronizing unit, OTUk output units and OSC output processing units；Step S4. time synchronizings unit receives OTUk time synchronizing signals and OSC time synchronizing signals, according to synchronous regime Information selects optimal time synchronizing signal, and is respectively sent to OTUk output units and OSC output processing units；Step S5.OTUk exports processing unit and OSC output processing unit respectively by the optimal clock sync signal of reception and most Excellent time synchronizing signal downstream exports as output signal.
- 4. the method for Synchronization Status Message extraction as claimed in claim 3, it is characterised in that：Step S2 specifically includes following step Suddenly：The Slave ports of step S201. frequency abstraction units pass through PTP Receive message timestamps；Step S202. carries out best master clock algorithm to the timestamp of acquisition and calculates acquisition optimal clock synchronizing signal；Step S203. sends optimal clock synchronizing signal to clock synchronization process unit.
- 5. the method for Synchronization Status Message extraction as claimed in claim 3, it is characterised in that：In step S3, the basis is same Walk status information and select optimal clock sync signal, specifically include following steps：Step S301. judges whether OTUk clock sync signals are normal, if so, jumping to step S302；If it is not, jump to step S305；Step S302. judges whether OSC clock sync signals are normal, if so, jumping to step S303；If it is not, jump to step S304；Step S303. chooses OSC clock sync signals as optimal clock sync signal；Step S304. chooses OTUk clock sync signals as optimal clock sync signal, while synchronous regime corresponding to inserting Simultaneously passage time synchronous processing unit is packaged message level；Step S305. judges whether OSC clock sync signals are normal, if so, jumping to step S306；If it is not, jump to step S307；Step S306. chooses OSC clock sync signals as optimal clock sync signal, while synchronous regime is believed corresponding to insertion Simultaneously passage time synchronous processing unit is packaged breath grade；The clock sync signal that step S307. selecting frequencies extraction unit is sent inserts simultaneously as optimal clock sync signal Simultaneously passage time synchronous processing unit is packaged corresponding Synchronization Status Message grade.
- 6. the method for Synchronization Status Message extraction as claimed in claim 5, it is characterised in that：The Synchronization Status Message grade By being expanded to obtain to Synchronization Status Message, specifically using in the reserve bytes of the row the 14th of Synchronization Status Message the 1st row Preceding 4 bits define Synchronization Status Message class information.
- 7. the method for Synchronization Status Message extraction as claimed in claim 5, it is characterised in that：When OTUk clock sync signals, OSC time synchronizing signals are unavailable or quality deterioration is less than reference clock or 2 grades of nodal clock SSU_A/QL-ST2 or 3 grades of nodes During clock SSU_B/QL-ST3E, then judge that the OTUk clock sync signals, OSC time synchronizing signals are abnormal；No person, normally.
- 8. the method for Synchronization Status Message extraction as claimed in claim 3, it is characterised in that：In step S4, the basis is same Status information selection optimal time synchronizing signal is walked, specifically includes following steps：Step S401. judges whether OTUk time synchronizing signals are normal, if so, jumping to step S402；If it is not, jump to step S405；Step S402. judges whether OSC time synchronizing signals are normal, if so, jumping to step S403；If it is not, jump to step S404；Step S403. chooses OSC time synchronizing signals as optimal time synchronizing signal；Step S404. chooses OTUk time synchronizing signals as optimal time synchronizing signal, and passage time synchronous processing unit It is packaged；Step S405. judges whether OSC time synchronizing signals are normal, if so, jumping to step S406；If it is not, jump to step S407；Step S406. chooses OSC time synchronizing signals as optimal time synchronizing signal, and passage time synchronous processing unit is entered Row encapsulation；The optimal clock sync signal that step S407. is sent by clock processing unit obtains optimal time synchronizing signal, and Passage time synchronous processing unit is packaged.
- 9. the method for the Synchronization Status Message extraction as described in claim 5 or 8, it is characterised in that：The passage time is synchronous Processing unit, which is packaged, specifically includes following steps：Step A. completes the encapsulation to PTP messages using general frame forming processing；PTP message informations are encapsulated into client's payload area by step B., and the check information of 4 bytes is encapsulated close to PTP messages；Packaged general frame forming processing information is carried in OTN expenses by step C..
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| CN106375054A (en) * | 2015-07-22 | 2017-02-01 | 中兴通讯股份有限公司 | OTN network element device, and OTN clock and time synchronization method and system |
| CN107547232B (en) * | 2016-06-28 | 2021-08-31 | 中兴通讯股份有限公司 | Network element equipment and transmission mode configuration device and method thereof |
| CN107579796B (en) * | 2017-09-21 | 2019-04-26 | 烽火通信科技股份有限公司 | A kind of the clock processing unit and method of OTN branch board |
| US10903924B2 (en) | 2019-02-07 | 2021-01-26 | International Business Machines Corporation | Setting primary reference time of server time protocol facility of a coordinated timing network to a precision-time-protocol source |
| US10958727B2 (en) | 2019-02-07 | 2021-03-23 | International Business Machines Corporation | Facilitating precision time protocol use in a coordinated timing network |
| CN112583508B (en) * | 2019-09-30 | 2022-05-13 | 比亚迪股份有限公司 | Clock synchronization communication system and method for rail train |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0527006A2 (en) * | 1991-07-31 | 1993-02-10 | AT&T Corp. | An optical switching system |
| CN102136900A (en) * | 2010-01-22 | 2011-07-27 | 华为技术有限公司 | Time synchronization method for passive optical network, device and system |
| CN102237941A (en) * | 2010-04-28 | 2011-11-09 | 中兴通讯股份有限公司 | Time synchronization system and method |
| CN103546273A (en) * | 2013-10-31 | 2014-01-29 | 烽火通信科技股份有限公司 | Frequency synchronism device and method based on PTP frames |
-
2014
- 2014-10-29 CN CN201410597222.6A patent/CN104363530B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0527006A2 (en) * | 1991-07-31 | 1993-02-10 | AT&T Corp. | An optical switching system |
| CN102136900A (en) * | 2010-01-22 | 2011-07-27 | 华为技术有限公司 | Time synchronization method for passive optical network, device and system |
| CN102237941A (en) * | 2010-04-28 | 2011-11-09 | 中兴通讯股份有限公司 | Time synchronization system and method |
| CN103546273A (en) * | 2013-10-31 | 2014-01-29 | 烽火通信科技股份有限公司 | Frequency synchronism device and method based on PTP frames |
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