CN102904634B - The detection method and device of circuit layer maintenance signal in a kind of OTN system - Google Patents
The detection method and device of circuit layer maintenance signal in a kind of OTN system Download PDFInfo
- Publication number
- CN102904634B CN102904634B CN201210361362.4A CN201210361362A CN102904634B CN 102904634 B CN102904634 B CN 102904634B CN 201210361362 A CN201210361362 A CN 201210361362A CN 102904634 B CN102904634 B CN 102904634B
- Authority
- CN
- China
- Prior art keywords
- alarm
- indication signal
- state
- ais
- signal
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Abstract
The invention discloses the detection method and device of circuit layer maintenance signal in a kind of OTN system, the method for the present invention includes：Circuit layer maintenance signal is detected using multiframe validation testing, to determine if to enter alarm indication signal OTLk AIS access states from non-alarm indication signal OTLk AIS states；When detecting circuit layer maintenance signal and having been enter into OTLk AIS access states, the detection of state is exited to the OTLk AIS that subsequent conditioning circuit layer maintenance signal carries out continuous multiple frames；If being not detected by the OTLk AIS exits state, OTLk ais alarm operations are carried out by way of timing alarm；If detecting the OTLk AIS exits state, the operation for entering non-OTLk AIS states from OTLk AIS access states is performed.Present invention can ensure that the reliability and stability of whole OTN data transfers.
Description
Technical field
The present invention relates to a kind of detection method of circuit layer maintenance signal in data communication field, more particularly to OTN system
And device.
Background technology
Optical transport network (OTN：Optical Transport Network) maintenance signal be used to carry out Fault Isolation and
Alarm suppresses, the burden for mitigating system maintenance.There is data transmission error on fiber break or circuit in OTN networks
During the excessive situation of rate, OTN equipment can detect the exception of stream signal, and downstream insert Alarm maintenance signal, under notice
Trip equipment inserts Alarm maintenance signal, can avoid repeating to alert and only report one to alert to network management system, and can enter
The corresponding fault location of row.
Alarm indication signal (AIS in the middle of G709 agreements:Alarm Indication Signal) it is divided into three according to function
Kind：OTUk-AIS, OTLk-AIS, ODUk-AIS.
OTUk-AIS(OTU：Optical Channel Transport Unit) it is defined for supporting future service layer
Using OTN equipment should be able to detect this maintenance signal, but necessarily produce the maintenance signal.OTUk-AIS signals do not have
There is frame head, content is stuffed entirely with PN-11 sequences, be not PN-11 sequences because the frames of OTUk mono- include 130560bit
The integral multiple of (2047bit), so PN-11 sequences can be across frame.It is worth noting that, in single channel transmission OTUk-AIS signals
When OTN equipment be possess detection PN-11 sequences ability, but when channel transmission OTUk-AIS signals, send
It is that cannot correctly send and receive data that side and recipient do not have frame head, so not possessing detection and producing the energy of PN-11 sequences
Power.
OTLk-AIS(OTL：Optical Channel Transport Lane) it is defined data for detecting OTL layers
Transmission situation, OTN equipment should be able to detect this maintenance signal, and the maintenance signal is produced according to the actual requirements.OTLk-AIS
There is frame head, substitute data of the original PN-11 sequences in the position, and the flag bit of 0xFF is inserted on corresponding byte.
According to speed grade, G709 knows clearly OTL3-AIS and OTL4-AIS surely.Frame head and the flag byte composition of OTL3-AIS are OA1_
OA1_OA1_OA2_OA2_OA2_0xFF, wherein the 7th byte is multi-frame byte position, is substituted by 16 system 0xFF, and recipient is led to
Cross whether the 7th byte of detection is that 0xFF determines whether OTL3-AIS.Frame head and the flag byte composition of OTL4-AIS are OA1_
OA1_OA1_OA2_OA2_0xFF, wherein the 6th byte is LLM (Logic Lane Marker) byte position, by 16 systems
0xFF is substituted, and recipient is by detecting whether the 6th byte is that 0xFF determines whether OTL4-AIS.
ODUk-AIS(ODU：Optical Channel Data Unit) it is defined and is used to refer to whether upstream equipment occurs
Failure, report and alarm after upstream device detection, for failure monitoring and positioning.ODUk-AIS signals remove FAOH, OTUk-OH and
Beyond FTFL subsegments, all it is filled to be 1, OTN equipment and determines whether to produce by detecting STAT of TCM and PM overhead fields
Raw ODUk-AIS.
OTUk-AIS can be only applied in single channel system, and ODUK-AIS is applied to ODU layers after data recovery framing
Face, falls within single channel aspect.And OTLk-AIS is then the AIS detections for being applied to multi-channel system.
According to the description of G709, the generation of OTLk-AIS be detect 0xFF flag bit it is effective.
Fig. 1 shows the general processing methods of current OTLk-AIS, including：
1st, detect the 6th byte for 0xFF, then complain to OTL4-AIS alarms (OTL3-AIS detect the 7th byte whether be
0xFF)
2nd, persistently detect whether the 6th byte is 0xFF in the case of OTL4-AIS alarms are effective, once otherwise exit
OTL4-AIS alarm statuses (OTL3-AIS detects whether the 7th byte is 0xFF)
In the case of non-AIS data-signals, when the bit error rate is smaller, fragmentary error code can also be produced the processing mode
OTLk-AIS signals, such case is irrational.
In the case of AIS data-signals, OTLk-AIS states can be also exited when the bit error rate is larger, such case is also
It is irrational.
Fig. 2 shows the detection process method of existing another OTLk-AIS, including：
1st, continuous 24 OTLk frames detect the 6th byte for 16 system 0xFF, then complain to OTL4-AIS alarms (OTL3-AIS
Detect whether the 7th byte is 0xFF)
2nd, it is not 16 system 0xFF that continuous 24 OTLk frames detect the 6th byte, then remove OTL4-AIS alarms (OTL3-
AIS detects whether the 7th byte is 0xFF).
The processing mode is improved and is entering the wrong possibility of OTLk-AIS states relative to former approach, is improved
Enter the requirement of AIS, but in the case of AIS data-signals, larger error code is occurred in that on the link of originating data to receiving end
When, because the influence of error code will be unable to meet, this results in receiving end and cannot be introduced into OTLk- the condition of continuous 24 OTLk frames
The state of AIS.In addition also due to error code, continuous 24 OTLk frames are not that the condition of 16 system 0xFF cannot also meet, and
The state of OTLk-AIS cannot be exited
In order to reach the Detection results of more accurate more stable detection OTLk-AIS, it would be desirable to meet following several aspects
Requirement：
1st, in the case of non-AIS data-signals, it is impossible to enter OTLk-AIS states due to the influence of error code；
2nd, in the case of AIS data-signals, it is impossible to OTLk-AIS states are exited due to the influence of error code.
3rd, the AIS data-signal situations that turn to are become in non-AIS data-signals situation, or the change of AIS data-signals situation is turned to
Non- AIS data-signals situation, it is impossible to can not accurately and reliably be detected due to the influence of error code.
The content of the invention
It is an object of the invention to provide a kind of detection method of circuit layer maintenance signal in OTN system, to there is error code
In the case of the detection that can correctly stablize and exit OTLk-AIS (that is, alarm indication signal) state.
It is a further object of the present invention to provide a kind of device for implementing the above method.
According to a first aspect of the present invention, the detection side of circuit layer maintenance signal in a kind of optical transport network system for being provided
Method includes：
Circuit layer maintenance signal is detected, to determine if to enter OTLk-AIS accesses from non-OTLk-AIS states
State；
When detecting circuit layer maintenance signal and having been enter into OTLk-AIS access states, subsequent conditioning circuit layer maintenance signal is entered
The OTLk-AIS of row continuous multiple frames exits the detection of state；
If being not detected by the OTLk-AIS exits state, OTLk-AIS alarm behaviour is carried out by way of timing alarm
Make；If detecting the OTLk-AIS exits state, perform from OTLk-AIS access states and enter non-OTLk-AIS states
Operation.
Preferably, the described OTLk-AIS alarm operations that carried out by way of timing alarm are included：Start timing, and in meter
When during continue to exit state to the OTLk-AIS and detect, if when timing expires, being not detected by the OTLk-AIS
State is exited, then produces OTLk-AIS alarms, and carry out alarm signal underthrust；If before timing expires, detecting described
OTLk-AIS exits state, then perform the operation for exiting OTLk-AIS access states.
Preferably, perform and exit the operation of OTLk-AIS access states and include：Enter non-from OTLk-AIS access states
OTLk-AIS states, and OTLk-AIS access states are removed by timing mode.
Preferably, removing OTLk-AIS access states by timing mode includes：Start timing, and when timing expires,
OTLk-AIS alarm clearance signals are produced, to remove the OTLk-AIS access states.
Preferably, described use multiframe validation testing carries out detection to circuit layer maintenance signal to be included：Circuit layer is tieed up
The system OxFF of alarm flag bit 16 for protecting the OTL frames of signal is detected, if continuous multiple frames detect 16 system OxFF, this
Circuit layer maintenance signal is defined as entering OTLk-AIS access states from non-OTLk-AIS states, conversely, being then defined as non-
OTLk-AIS states.
Preferably, in the detection that the OTLk-AIS for carrying out continuous multiple frames exits state, letter is safeguarded to follow-up circuit layer
Number the system OxFF of alarm flag bit 16 of OTL frames detected, if continuous multiple frames all do not detect 16 system OxFF,
The circuit layer maintenance signal is defined as entering into OTLk-AIS from OTLk-AIS states and exits state, conversely, being then defined as
It is maintained at OTLk-AIS access states.
Preferably, the OTL frames are OTL3 frames or OTL4 frames, and 16 described system OxFF are located at the 7th byte of OTL3 frames
Or the 6th byte of OTL4 frames.
Preferably, circuit layer maintenance signal is detected using multiframe validation testing, and described multiframe is 5 frames.
According to a second aspect of the present invention, the inspection of circuit layer maintenance signal in a kind of optical transport network system that the present invention is provided
Surveying device includes：
OTLk-AIS access state detection units, are detected using multiframe validation testing to circuit layer maintenance signal, with
Determine whether circuit layer maintenance signal enters OTLk-AIS access states from non-OTLk-AIS states；
OTLk-AIS exits state detection unit, for detecting circuit layer maintenance signal into OTLk-AIS access shapes
During state, state-detection is exited to the OTLk-AIS that subsequent conditioning circuit layer maintenance signal carries out continuous multiple frames；
OTLk-AIS alarm operation units, the OTLk- is not detected by for exiting state detection unit in OTLk-AIS
When AIS exits state, OTLk-AIS alarm operations are carried out by Delayed Alarm mode；
OTLk-AIS exits access state operating unit, for OTLk-AIS exit state detection unit detect it is described
When OTLk-AIS exits state, the operation of OTLk-AIS access states is exited in execution.
Preferably, the OTLk-AIS alarm operations unit includes：Timer, for it is determined that circuit layer maintenance signal from
Timing is carried out when non-OTLk-AIS states are into OTLk-AIS access states；OTLk-AIS alarm reports and alarm data underthrust control
Unit processed, during for expiring in timer, performs OTLk-AIS alarms generation and the control of alarm signal underthrust.
Relative to prior art, the solution have the advantages that, carry out access OTLk- by using multiframe validation testing
The non-OTLk-AIS detections of AIS state-detections and 3ms to be exiting OTLk-AIS states, it is to avoid in non-AIS data-signals feelings
Under condition, OTLk-AIS states are entered due to the influence of error code, and in the case of AIS data-signals, due to the influence of error code
And exit the possibility of OTLk-AIS states, it is ensured that the reliability and stability of whole OTN data transfers.
The method of the present invention and device are described in detail below in conjunction with the accompanying drawings.
Brief description of the drawings
Fig. 1 is the schematic diagram of one of the handling process of OTLk-AIS alarms in existing OTN system；
Fig. 2 is the schematic diagram of the two of the handling process of OTLk-AIS alarms in existing OTN system；
Fig. 3 is showing for the detection method of circuit layer maintenance signal in a kind of optical transport network system of the invention
It is intended to；
Fig. 4 is the schematic diagram of the detection means of circuit layer maintenance signal in a kind of optical transport network system of the invention；
Fig. 5 is the embodiment of the state machine of the detection for implementing circuit layer maintenance signal in optical transport network system of the invention
Schematic diagram；
Fig. 6 is the stream of the embodiment of the detection method for implementing circuit layer maintenance signal in optical transport network system of the invention
Cheng Tu.
Specific embodiment
Fig. 3 shows the detection method of circuit layer maintenance signal in a kind of optical transport network system of the invention, such as Fig. 3 institutes
Show, comprise the following steps：
Circuit layer maintenance signal is detected, to determine if to enter from non-alarm indication signal OTLk-AIS states
Alarm indication signal OTLk-AIS access states；For example, the present invention can be using multiframe validation testing to circuit layer maintenance signal
Detected；
When detecting circuit layer maintenance signal and having been enter into OTLk-AIS access states, subsequent conditioning circuit layer maintenance signal is entered
The OTLk-AIS of row continuous multiple frames exits the detection of state；
If being not detected by the OTLk-AIS exits state, OTLk-AIS alarm behaviour is carried out by way of timing alarm
Make；If detecting the OTLk-AIS exits state, perform from OTLk-AIS access states and enter non-OTLk-AIS states
Operation.
It should be noted that for the ease of description, by above-mentioned OTLk-AIS, (alarm of light-path Transfer pipe is indicated the present invention
Signal) it is referred to as alarm indication signal.
By the present invention in that carrying out the non-OTLk-AIS inspections of OTLk-AIS access states and timing with multiframe validation testing
Survey exiting OTLk-AIS states, it is to avoid in the case of non-AIS data-signals, OTLk-AIS is entered due to the influence of error code
State, and in the case of AIS data-signals, the possibility of OTLk-AIS states is exited due to the influence of error code, it is ensured that
The reliability and stability of whole OTN data transfers.
Wherein, the above-mentioned OTLk-AIS alarm operations that carried out by way of timing alarm are included：Start timing, and in timing
Period continuation is exited state and is detected to the OTLk-AIS；If when timing expires, being not detected by the OTLk-AIS and moving back
Do well, then produce OTLk-AIS alarms, and carry out alarm signal underthrust；If before timing expires, detecting the OTLk-
AIS exits state, then perform the operation for exiting OTLk-AIS access states.
Wherein, above-mentioned execution is exited the operation of OTLk-AIS access states and is included：Enter from OTLk-AIS access states
Non- OTLk-AIS states, and OTLk-AIS access states are removed by timing mode, specifically, start timing, and in the timing phase
Man Shi, produces OTLk-AIS alarm clearance signals, to remove the OTLk-AIS access states.
Wherein, above-mentioned use multiframe validation testing carries out detection to circuit layer maintenance signal to be included：Circuit layer is safeguarded
The system OxFF of alarm flag bit 16 of the OTL frames of signal is detected, if continuous multiple frames detect 16 system OxFF, the electricity
Road floor maintenance signal is defined as entering OTLk-AIS access states from non-OTLk-AIS states, conversely, being then defined as non-
OTLk-AIS states.
Additionally, in the detection that the OTLk-AIS for carrying out continuous multiple frames exits state, to follow-up circuit layer maintenance signal
The system OxFF of alarm flag bit 16 of OTL frames detected, if continuous multiple frames all do not detect 16 system OxFF, this
Circuit layer maintenance signal is defined as entering into OTLk-AIS from OTLk-AIS states and exits state, conversely, being then defined as protecting
Hold in OTLk-AIS access states.
Additionally, above-mentioned OTL frames can be OTL3 frames or OTL4 frames, 16 system OxFF be located at OTL3 frames the 7th byte or
6th byte of OTL4 frames, timing can be 3ms.In addition, above-mentioned continuous multiple frames can be 5 frames.
Fig. 4 shows the detection means of circuit layer maintenance signal in a kind of optical transport network system of the invention, such as Fig. 4 institutes
Show, including
OTLk-AIS access state detection units, are detected using multiframe validation testing to circuit layer maintenance signal, with
Determine whether circuit layer maintenance signal enters OTLk-AIS access states from non-OTLk-AIS states；
OTLk-AIS exits state detection unit, for detecting circuit layer maintenance signal into OTLk-AIS access shapes
During state, state-detection is exited to the OTLk-AIS that subsequent conditioning circuit layer maintenance signal carries out continuous multiple frames；
OTLk-AIS alarm operation units, the OTLk- is not detected by for exiting state detection unit in OTLk-AIS
When AIS exits state, OTLk-AIS alarm operations are carried out by Delayed Alarm mode；
OTLk-AIS exits access state operating unit, for OTLk-AIS exit state detection unit detect it is described
When OTLk-AIS exits state, the operation of OTLk-AIS access states is exited in execution.
Wherein, OTLk-AIS alarm operations unit can include：Timer, for it is determined that circuit layer maintenance signal is from non-
Timing is carried out when OTLk-AIS states are into OTLk-AIS access states；OTLk-AIS alarm reports and alarm data underthrust are controlled
Unit, during for expiring in timer, performs OTLk-AIS alarms generation and the control of alarm signal underthrust.
With reference to the specific embodiment shown in Fig. 5 and Fig. 6, circuit layer in optical transport network system of the invention is safeguarded
The detection method of signal is described in detail.
Fig. 5 is by taking OTL4-AIS as an example, it is shown that implement the detection of circuit layer maintenance signal in a kind of OTN system of the invention
The state machine of method.
1st, when initial, OTLk enters AIS_OOF states (that is, non-OTLk-AIS states),
2nd, whether corresponding continuous 5 frames of 6th byte of detection frame head are 0xFF, if yes then enter AIS_IF states (i.e.,
OTLk-AIS states access state), AIS_OOF is otherwise maintained at,
3rd, under AIS_IF states, whether continuous 5 frames of corresponding 6th byte of detection frame head are not all 0xFF, if
Then enter AIS_OOF states, be otherwise then maintained at AIS_IF states,
4th, under AIS_IF states, the counting of 3ms is carried out, once the full 3ms of meter, then produce OTLk-AIS alarms, in AIS_
Under OOF states, the 3ms of AIS_IF is counted and will suspended,
5th, under AIS_OOF states, the counting of 3ms is carried out, once the full 3ms of meter, then produce OTLk-AIS alarm clearances letter
Number, AIS_IF3ms is counted clear 0.
Fig. 6 shows the flow chart of the inventive method embodiment, and handling process is as follows：
Step S100, the original state of circuit layer maintenance signal is AIS-OOF states；
Step S101,20 passages detect the 6th byte simultaneously；
Step S102, judges whether continuous 5 frame for 0xFF, if so, into step S103, otherwise return to step S101；
Step S103, into AIS-IF states；
Step S104, judges whether that continuous 5 frame power is not 0xFF, if so, then returning to step S100, otherwise then returns to step
S103；
Step S105, after step S100 is returned to, carries out AIS-IF states 3ms countings；Step S106, determines whether
AIS-IF states, if so, then AIS-OOF states 3ms counter O resets；Conversely, then entering step S107；
Step S107, carries out AIS-OOF states 3ms countings, if meter is full, into step S108, and if not counting full, AIS-
IF state 3ms counter O reset invalidating signals；
Step S108, AIS-IF state 3ms counter O reset signals are effective；
Whether effectively step S109, judge AIS-IF state 3ms counter O resets signal, if effectively, calculator resets,
Conversely, then entering step S110；
Whether step S110, judges that AIS-IF states 3ms is counted and counts full, if so, then enter step S112, conversely, into
Step S111；
Step S111, performs AIS-IF states 3ms and counts；
Step S112, produces OTLk-AIS alarms and underthrust alarm signal.
In sum, present invention, avoiding in the case of non-AIS data-signals, OTLk- is entered due to the influence of error code
AIS states, and in the case of AIS data-signals, the possibility of OTLk-AIS states is exited due to the influence of error code, it is ensured that
The reliability and stability of whole OTN data transfers
Although being described in detail to the present invention above, the invention is not restricted to this, those skilled in the art of the present technique
Various modifications can be carried out with principle of the invention.Therefore, all modifications made according to the principle of the invention, all should be understood to
Fall into protection scope of the present invention.
Claims (10)
1. in a kind of optical transport network system circuit layer maintenance signal detection method, it is characterised in that comprise the following steps：
Circuit layer maintenance signal is detected, to determine if to enter alarm indication signal from non-alarm indication signal state
Access state；
When detecting circuit layer maintenance signal and having been enter into alarm indication signal access state, subsequent conditioning circuit layer maintenance signal is entered
The alarm indication signal of row continuous multiple frames exits the detection of state；
If being not detected by the alarm indication signal exits state, alarm indication signal alarm is carried out by way of timing alarm
Operation；If detecting the alarm indication signal exits state, perform from alarm indication signal access state and enter non-alarm
The operation of indication signal state.
2. method according to claim 1, it is characterised in that the described alarm that carried out by way of timing alarm indicates letter
Number alarm operation includes：
Start timing, and continue to exit state to the alarm indication signal during timing and detect,
If when timing expires, being not detected by the alarm indication signal and exiting state, then alarm indication signal alarm is produced, and
Carry out alarm signal underthrust；
If before timing expires, detecting the alarm indication signal and exiting state, then perform and exit alarm indication signal standard
Enter the operation of state.
3. method according to claim 2, it is characterised in that perform the operation bag for exiting alarm indication signal access state
Include：Enter non-alarm indication signal state from alarm indication signal access state, and indicate to believe by timing mode cleared alarm
Number access state.
4. method according to claim 3, it is characterised in that by timing mode cleared alarm indication signal access state
Including：Start timing, and when timing expires, produce alarm indication signal alarm clear signal, indicated with removing the alarm
Signal access state.
5. method according to claim 1, it is characterised in that described detection is carried out to circuit layer maintenance signal to include：
The system OxFF of alarm flag bit 16 to the OTL frames of circuit layer maintenance signal is detected, if continuous multiple frames detect 16 systems
OxFF, then be defined as the circuit layer maintenance signal entering alarm indication signal access state from non-alarm indication signal state,
Conversely, being then defined as non-alarm indication signal state.
6. method according to claim 1, it is characterised in that exit state in the alarm indication signal for carrying out continuous multiple frames
Detection in, the system OxFF of alarm flag bit 16 to the OTL frames of follow-up circuit layer maintenance signal is detected, if continuous many
Frame does not all detect 16 system OxFF, then the circuit layer maintenance signal is defined as entering into announcement from alarm indication signal state
Alert indication signal exits state, conversely, being then defined as being maintained at alarm indication signal access state.
7. the method according to claim 5 or 6, it is characterised in that the OTL frames are OTL3 frames or OTL4 frames, described
16 system OxFF are located at the 7th byte of OTL3 frames or the 6th byte of OTL4 frames.
8. the method according to claim 5 or 6, it is characterised in that using multiframe validation testing to circuit layer maintenance signal
Detected, and described multiframe is 5 frames.
9. in a kind of optical transport network system circuit layer maintenance signal detection means, it is characterised in that including
Alarm indication signal access state detection unit, is detected using multiframe validation testing to circuit layer maintenance signal, with
Determine whether circuit layer maintenance signal enters alarm indication signal access state from non-alarm indication signal state；
Alarm indication signal exits state detection unit, for detecting circuit layer maintenance signal into alarm indication signal standard
When entering state, state-detection is exited to the alarm indication signal that subsequent conditioning circuit layer maintenance signal carries out continuous multiple frames；
Alarm indication signal alarm operating unit, the announcement is not detected by for exiting state detection unit in alarm indication signal
When alert indication signal exits state, alarm indication signal alarm operation is carried out by Delayed Alarm mode；
Alarm indication signal exits access state operating unit, is detected for exiting state detection unit in alarm indication signal
When the alarm indication signal exits state, the operation of alarm indication signal access state is exited in execution.
10. the detection means according to claim 9, it is characterised in that the alarm indication signal alarm operating unit bag
Include：
Timer, for it is determined that circuit layer maintenance signal enters alarm indication signal access shape from non-alarm indication signal state
Timing is carried out during state；
Alarm indication signal alarm report with alarm data underthrust control unit, in timer expire when, perform announcement
Alert indication signal alarm generation and the control of alarm signal underthrust.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210361362.4A CN102904634B (en) | 2012-09-25 | 2012-09-25 | The detection method and device of circuit layer maintenance signal in a kind of OTN system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210361362.4A CN102904634B (en) | 2012-09-25 | 2012-09-25 | The detection method and device of circuit layer maintenance signal in a kind of OTN system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102904634A CN102904634A (en) | 2013-01-30 |
| CN102904634B true CN102904634B (en) | 2017-05-31 |
Family
ID=47576695
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210361362.4A Active CN102904634B (en) | 2012-09-25 | 2012-09-25 | The detection method and device of circuit layer maintenance signal in a kind of OTN system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102904634B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104572530B (en) * | 2013-10-09 | 2019-07-19 | 上海市计算技术研究所 | A kind of slave computer, host computer and data transmission method |
| CN105323089B (en) * | 2014-07-17 | 2018-06-29 | 中国电信股份有限公司 | The method of positioning failure, equipment, controller and system in cross-domain transmission net |
| US10951963B2 (en) | 2014-08-07 | 2021-03-16 | Ciena Corporation | Fast mesh restoration systems and method with real time detection of fault location |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1713591A (en) * | 2004-06-22 | 2005-12-28 | 中兴通讯股份有限公司 | Alarm correlation analysis of light synchronous transmitting net |
| CN1738213A (en) * | 2004-08-18 | 2006-02-22 | 华为技术有限公司 | Method for preventing error connection |
| WO2008154181A1 (en) * | 2007-06-05 | 2008-12-18 | Cisco Technology, Inc. | Response to otuk-bdi for otn interfaces to restore bidirectional communications |
-
2012
- 2012-09-25 CN CN201210361362.4A patent/CN102904634B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1713591A (en) * | 2004-06-22 | 2005-12-28 | 中兴通讯股份有限公司 | Alarm correlation analysis of light synchronous transmitting net |
| CN1738213A (en) * | 2004-08-18 | 2006-02-22 | 华为技术有限公司 | Method for preventing error connection |
| WO2008154181A1 (en) * | 2007-06-05 | 2008-12-18 | Cisco Technology, Inc. | Response to otuk-bdi for otn interfaces to restore bidirectional communications |
| CN101682459A (en) * | 2007-06-05 | 2010-03-24 | 思科技术公司 | Response to OTUK-BDI for ITN interfaces to restore bidirectional communications |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102904634A (en) | 2013-01-30 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105429094B (en) | A kind of apparatus and method for ensureing intelligent substation trip protection reliability | |
| CN104683168B (en) | A kind of transformer station process layer network communication failure automatic positioning method | |
| CN102904634B (en) | The detection method and device of circuit layer maintenance signal in a kind of OTN system | |
| WO1996041440A1 (en) | Method and system for identifying fault locations in a communications network | |
| CN101316051A (en) | Internetwork communication log analysis system and method based on IEC61850 transforming plant automatization system | |
| CN106300682B (en) | A kind of method of distribution power automation terminal centralized management | |
| Kasztenny et al. | Communications and data synchronization for line current differential schemes | |
| CN105527564B (en) | FPGA built-in functions self-diagnosing method and system | |
| WO2000016510A9 (en) | Signal conversion for fault isolation | |
| CN107370537A (en) | A kind of detection method of Fibre-optical Pilot Protection | |
| US20080175141A1 (en) | Distributed protection switching architecture for point-to-point microwave radio systems | |
| CN104104542B (en) | A kind of real-time intelligent troubleshooting method based on RS485 | |
| CN103888236A (en) | Clock synchronization monitoring method applicable to intelligent substation | |
| CN106100918A (en) | A kind of substation data based on EMS system does not refresh detection method | |
| US20120047419A1 (en) | Transmission system | |
| CN104377813B (en) | Wide area protection system with time delay management function and the method for realizing time delay management function | |
| CN106647228A (en) | Convertor station master clock fault determination system | |
| US9110798B2 (en) | Method and system for preventing holding-off of a protection switching for a plurality of alarms | |
| CN204316186U (en) | There is the Wide area protection system of time delay management function | |
| CN104092584A (en) | Smart substation network communication signal detector | |
| Cisco | System Maintenance and Monitoring | |
| CN108931696A (en) | A kind of the B code clock method for detecting abnormality and protective relaying device of intelligent substation | |
| CN104348676B (en) | A kind of chain circuit detecting method and equipment based on operation management maintainance OAM | |
| CN110323724B (en) | Annular power distribution network relay protection device capable of automatically judging direction and control method | |
| CN102386993B (en) | Protection switching method for optical transport networks and transport device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |