CN101383635B - Inter-plate channel protection method and device - Google Patents
Inter-plate channel protection method and device Download PDFInfo
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- CN101383635B CN101383635B CN200710076945.1A CN200710076945A CN101383635B CN 101383635 B CN101383635 B CN 101383635B CN 200710076945 A CN200710076945 A CN 200710076945A CN 101383635 B CN101383635 B CN 101383635B
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Abstract
本发明适用于通信领域，提供了一种板间通道保护方法及装置，用于波分复用系统中，其中方法包括下述步骤：主单板检测接收到的信号，并当检测到信号正常时输出信号，备单板检测接收到的信号，并当检测到信号正常时输出信号；选收单元选收主单板或备单板输出的信号。本发明通过主、备单板对接收的光信号进行检测，允许主、备单板位于相同或不同的子架上，单板所在子架上的主机不需要对单板进行监听，当主、备单板位于不同子架上时，主机间也无需跨子架通信，节省了通信时间，提高了倒换速度。
The present invention is applicable to the communication field, and provides a method and device for inter-board channel protection, which are used in a wavelength division multiplexing system, wherein the method includes the following steps: the main single board detects the received signal, and when the detected signal is normal Output signal, the standby board detects the received signal, and outputs the signal when it detects that the signal is normal; the selective receiving unit selectively receives the signal output by the main board or the backup board. The invention detects the received optical signal through the main board and the standby board, allowing the main board and the backup board to be located on the same or different subracks, and the host on the subrack where the board is located does not need to When the boards are located on different subracks, there is no need for cross-subrack communication between hosts, which saves communication time and improves switching speed.
Description
Technical field
The invention belongs to the communications field, relate in particular to channel protection method and device between a kind of plate.
Background technology
Along with wavelength division multiplexing (Wavelength Division Multiplexing, the WDM) development of technology and the raising of optical signal transmission speed, the safety and reliability of transmission channel has become the network Development must not irrespective factor.
Existing wavelength channel protection equipment such as 1+1 wavelength channel protection equipment, can only dispose in a subrack, adopts two of head ends, the mechanism that the tail end choosing is received.At transmitting terminal, signal is divided into two-way through coupler, sends to respectively on active and standby two veneers.Shown in Figure 1A, at receiving terminal, main veneer 1 and standby plane 2 be the light signal of the active and standby veneer output of receiving end/sending end respectively, and controlled the laser switch of active and standby veneer output according to the signal quality that receives by the main frame 3 on the subrack, make wherein signal that the veneer output quality is good, all select under normal circumstances the light signal of main veneer 1 output.
As shown in Figure 1B, but when the Signal Degrade on the main veneer 1 or inefficacy, the laser of main frame 3 control standby planes 2 is opened, and by standby plane 2 output signals, the realization protection is switched.Common active and standby veneer adopts optical conversion element (Optical Conversion Unit, OCU) or optical transport unit (Optical TransponderUnit, OTU) veneer.
But the veneer of all transmitting terminals must be configured in the subrack, and the veneer of receiving terminal also needs such configuration.As shown in Figure 2; the left side is single subrack; the right side is three integrating cabinets that son is configured to; the groove position of each subrack is limited; and the board type of each groove position correspondence of subrack is fixed, if therefore do not have vacant slot to offer the protection veneer, can only realize protection by other veneer of replacing on the subrack so; this certainly will make the veneer break-off that is replaced, and is very inconvenient.And main frame need to monitor main and standby boards, the sequence of operations such as switch according to snoop results control, therefore reduced the speed of switching.
Also develop at present a kind of active and standby veneer and can be arranged on technology on the different subracks; main frame on the different subracks at active and standby veneer place is by striding the different veneer of subrack telecommunication management; according to the laser switch of the situation of signal on active and standby veneer control veneer output, active and standby veneer is arranged on the different subracks but still can realizes the wavelength channel defencive function.
But, realizing between the main frame on the different subracks that stride subrack communication needs netting twine to interconnect, transmission speed is slower, and main frame realizes that control need to be monitored and wait sequence of operations that need the regular hour, this has all reduced the speed of switching of protecting.In addition, the netting twine between a plurality of main frames becomes flexible or fracture all affects the switch function realization, and the different veneer of a plurality of Host Administration has also increased the probability of makeing mistakes, poor reliability.
Summary of the invention
The purpose of the embodiment of the invention is to provide channel protection method between a kind of plate, is intended to solve prior art and adopts main frame to monitor veneer control to switch and cause switching slow-footed problem.
The embodiment of the invention is to realize like this, channel protection method between a kind of plate comprises the steps: that main veneer detects the signal that receives, and when detecting signal output signal when normal, standby plane detects the signal receive, and when detecting signal output signal when normal; When detecting the abnormal signal that it receives, described main veneer or standby plane stop output signal; The signal that main veneer or standby plane output are received in the unit choosing is received in choosing.
The embodiment of the invention also provides channel protection device between a kind of plate, comprising: main veneer, and for detection of the signal that receives, and when detecting signal output signal when normal; Standby plane, for detection of the signal that receives, and when detecting signal output signal when normal; And choosing receipts unit, be used for the signal that main veneer or standby plane output are received in choosing; Wherein, described main veneer or standby plane also are used for stopping output signal when detecting the abnormal signal that it receives.
The embodiment of the invention is by main; standby plane detects the light signal that receives; adopting choosing to receive the unit choosing receives main; the signal of standby plane; therefore the main frame on the subrack of veneer place does not need veneer is monitored; more do not need main frame to stride subrack communication; therefore not only improve protection and switched speed; strengthened the reliability of switching; and allow main; standby plane is placed on the identical or different subrack; the convenience that increases the flexibility of networking and realize protecting; and also allow in actual applications main; the subrack at standby plane and place thereof adopts the brand of different manufacturers, has improved the practicality of networking.
Description of drawings
Figure 1A and Figure 1B are the schematic diagrames that the respectively active and standby veneer realization of prior art receiving terminal host computer control is switched;
Fig. 2 is the schematic diagram of prior art rack and subrack;
Fig. 3 is the flow chart of channel protection method between embodiment of the invention plate;
Fig. 4 is the schematic diagram of channel protection device between embodiment of the invention plate;
Fig. 5 is the schematic diagram that the unit is received in embodiment of the invention choosing;
Fig. 6 be between the embodiment of the invention plate path protection equipment at signal schematic diagram under normal circumstances;
Fig. 7 is the schematic diagram during the path protection device switching between embodiment of the invention plate;
Fig. 8 is the schematic diagram of the recovery pattern OLP veneer of embodiment of the invention receiving terminal; And
Fig. 9 is the schematic diagram of the non-recovery pattern OLP veneer of embodiment of the invention receiving terminal.
Embodiment
In order to make purpose of the present invention, technical scheme and advantage clearer, below in conjunction with drawings and Examples, the present invention is further elaborated.Should be appreciated that specific embodiment described herein only in order to explain the present invention, is not intended to limit the present invention.
Channel protection method is used for wavelength-division multiplex system between the plate of the embodiment of the invention; defencive function is by OTU, Optical Line Protection (Optical Line Protection; OLP) veneer and main frame are collaborative finishes; the OTU veneer is responsible for receiving professional detection; the signal quality that main frame detects according to OTU is controlled the output of OTU luminous power, and the OLP veneer is carried out according to the variation of the professional luminous power of two-way and switched.
As shown in Figure 3, channel protection method specifically comprises the steps: between embodiment of the invention plate
In step S101, active and standby veneer is set respectively on the subrack of transmitting terminal and receiving terminal, active and standby veneer can adopt the OTU veneer, can lay respectively on the different subracks, also can be positioned on the identical subrack;
In step S103, at the service signal transmitting terminal, the single channel service signal is copied into the identical signal of two-way, then sends to respectively active and standby veneer;
In step S105, the active and standby veneer of transmitting terminal sends to the light signal that receives respectively the active and standby veneer of receiving terminal;
In step S107, the active and standby veneer of receiving terminal detects respectively the light signal receive in real time, judges whether the signal that receives lost efficacy or deteriorated, is execution in step S109 then, otherwise execution in step S111;
In step S109, detect that light signal lost efficacy or deteriorated main veneer or standby plane report main frame on the subrack of place with the Signal Fail warning, close the laser switch of veneer behind the host acknowledgement, then execution in step S113;
In step S111, detect the light signal that the normal veneer output of light signal receives, if the laser of veneer is closed condition at this moment, veneer notice host signal recovers normal, main frame is opened the switch of laser, and signal is normally exported;
In step S113, choosing is received the unit and is detected in real time whether output optical signal of main veneer, when detecting main veneer output optical signal, receive the light signal of main veneer output, when not detecting main veneer output signal, then receive the light signal of standby plane output, in the signal process that receives standby plane output, if again detect main veneer output optical signal, be switched to the light signal that receives main veneer, namely as long as main veneer has light signal output, the light signal that selective reception master veneer is exported;
In step S115, the light signal that unit output receives is received in choosing, and rebound step S113 cycle detection.
Among this external step S113, in the signal process that receives standby plane output, if the signal that also can still keep receiving standby plane output when the unit detects main veneer output signal is again received in choosing, no longer be switched to the signal that receives main veneer output, only have the Signal Fail that receives when standby plane and just be switched to the signal that receives main veneer output when stopping to export.
Below with reference to channel protection device between the plate of the accompanying drawing detailed description embodiment of the invention.
As shown in Figure 4; channel protection device sends the identical light signal of two-way at transmitting terminal between the plate of the embodiment of the invention; receive respectively two ways of optical signals at receiving terminal master veneer 11, standby plane 12; and detect respectively the signal receive; all detecting signal all exports light signal when normal; if wherein any one detects signal and closes its output when not normal, if it is not normal then all close output all to detect signal.
When unit 15 is received in choosing for the recovery pattern, the detection module 151 that unit 15 is received in choosing detects whether output optical signal of main veneer 11 in real time, when detecting the light signal of main veneer 11 outputs, no matter whether standby plane 12 has output, and receiver module 153 is the light signal of selective reception master veneer 11 outputs all.When not detecting the light signal of main veneer 11 outputs, receiver module 153 is switched to the light signal (standby plane 12 has output) that receives standby plane 12 outputs.If receiver module 153 is when receiving the light signal of standby plane 12 outputs, detection module 151 has detected the output of main veneer 11 again, and receiver module 153 is switched to the light signal that receives main veneer 11 outputs.If active and standby veneer does not all have output, detection module 151 keeps detecting in real time main veneer 11, and receiver module 153 is in the wait accepting state.
The road signal that choosing receipts unit 15 will receive exports to carry out subsequent treatment.
When as shown in Figure 5 choosing receipts unit 25 is non-recovery pattern, detection module 251 detects whether output optical signal of main veneer in real time, when detecting the light signal of main veneer output, receiver module 253 receives the light signal of main veneer output, otherwise receives the light signal of standby plane output; When detection module 251 detects the light signal of main veneer output again in the light signal process of receiver module 253 reception standby plane outputs, receive the light signal that control module 255 control receiver modules 253 still keep receiving standby plane output, only when standby plane is not exported, just again be switched to the light signal that receives main veneer output.
Path protection equipment between the plate of the embodiment of the invention is described below with reference to accompanying drawing.
Between the plate of the embodiment of the invention in the path protection equipment, main veneer OTU1, the standby plane OTU2 of transmitting terminal and Optical Line Protection veneer OLP1 lay respectively on the different subrack of same rack (also can be positioned on the different subracks of different racks if need).As shown in Figure 6, the service source of the subrack at OLP1 veneer place sends the single channel service signal to the OLP1 veneer, and the OLP1 veneer is copied into identical two paths of signals with the single channel service signal, sends to respectively OTU1 and OTU2 veneer.
At receiving terminal; main veneer OTU3, standby plane OTU4 and Optical Line Protection veneer OLP2 also lay respectively on the different subracks of same rack (also can be positioned on the different subracks of different racks if need); OTU3 and OTU4 veneer receive respectively the light signal of OTU1 and OTU2 veneer; wherein the signal route of OTU1 and OTU3 veneer composition is the master channel of light signal, and OTU2 and OTU4 veneer are the alternate channel of light signal.
OTU3 and OTU4 veneer are after receiving light signal, whether detection signal occurs losing efficacy or deterioration event, if detect above-mentioned event, veneer is warned Signal Fail in the main frame that reports on the subrack of place, the laser switch of main frame closing plate output after confirming, as shown in Figure 7, make light signal can not output to the OLP2 veneer.After veneer detects the signal recovery, report main frame, reopen the laser switch of the output of veneer behind the host acknowledgement, make power output recover normal.Under normal circumstances, the host computer control laser on the subrack at veneer place is in opening always, guarantees that the light signal of veneer is exported to the OLP2 veneer in real time.
When the OLP2 veneer is set to recover pattern, as shown in Figure 8, the detection module 111 of OLP2 veneer detects whether output optical signal of main veneer OTU3 in real time, when detecting the light signal of main veneer OTU3 output, notice receiver module 113 receives the signal of main veneer OTU3 output, even standby plane OTU4 output optical signal receiver module 113 does not receive yet at this moment; When not detecting the light signal of main veneer OTU3 output, notice receiver module 113 is switched to the light signal that receives standby plane OUT4 output, if detection module 111 has detected the light signal of main veneer OTU3 output again in the process that receives the alternate channel signal, then notify receiver module 113 to be switched to the light signal that receives master channel.
Perhaps, as shown in Figure 9, the OLP2 veneer also can be set to non-recovery pattern, and when detection module 311 detected the signal of main veneer OTU3 output, notice receiver module 313 received the signal of main veneer OTU3 output.When detection module 311 did not detect the signal of main veneer OTU3 output, notice receiver module 313 received the alternate channel signal.In the process that receives the alternate channel signal, if detection module 311 has detected the light signal of main veneer OTU3 output again, reception control module 315 control receiver modules 313 continue to receive the alternate channel signals, and reception control module 315 is not just controlled receiver module 313 and is switched to reception master channel signal when standby plane OUT4 exports.
In the practical application, the OLP2 veneer is inserted on the subrack at main veneer OUT3 place of receiving terminal usually, but also can be inserted on the slave board subrack, can also be placed on the independent subrack of another one.
When the signals reverse of path protection equipment between whole plate, the OLP veneer of former receiving terminal can be changed into the function with transmission, and the OLP veneer of original sender also can have choosing and receive function.
Can only be positioned on the same subrack with respect to veneer; and need main frame to monitor the also prior art of control signal output; channel protection method and device between the plate that the embodiment of the invention provides; between subrack in the 1+1 optical wavelength path protection; veneer is responsible for receiving professional detection; the signal quality that main frame only is responsible for detecting according to veneer is controlled the output of veneer luminous power; therefore allow main; standby plane is located on the different subracks; the convenience that increases the flexibility of networking and realize protecting; and the subrack equipment that also allows in actual applications veneer and place thereof adopts the brand of different manufacturers, improved the practicality of networking.
In addition; between the plate that the embodiment of the invention provides channel protection method and the device in; signal is switched by the OLP veneer and is carried out according to the variation of the professional luminous power of two-way; main frame on the different subracks does not need to carry out communicating by letter between subrack; therefore be arranged on the different subracks with respect to veneer; but need main frame to monitor veneer and the prior art of striding subrack and communicating by letter; the embodiment of the invention has been saved main frame and has been monitored signal on the veneer and the time of main frame span subrack signal post waste; make the speed of switching faster; and do not exist the loosening or fracture of netting twine between a plurality of main frames affect the problem of switch function realization, strengthened the reliability of switching.
The above only is preferred embodiment of the present invention, not in order to limiting the present invention, all any modifications of doing within the spirit and principles in the present invention, is equal to and replaces and improvement etc., all should be included within protection scope of the present invention.
Claims (8)
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| Application Number | Priority Date | Filing Date | Title |
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| CN200710076945.1A CN101383635B (en) | 2007-09-06 | 2007-09-06 | Inter-plate channel protection method and device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN200710076945.1A CN101383635B (en) | 2007-09-06 | 2007-09-06 | Inter-plate channel protection method and device |
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| CN101383635A CN101383635A (en) | 2009-03-11 |
| CN101383635B true CN101383635B (en) | 2013-04-17 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102244540A (en) * | 2010-05-11 | 2011-11-16 | 华为技术有限公司 | Optical module and method for protecting optical layer |
| CN104168067A (en) * | 2014-08-29 | 2014-11-26 | 四川华拓光通信股份有限公司 | Method for judging optical power signal intensity in optical receiving circuit and circuit thereof |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1536805A (en) * | 2003-04-09 | 2004-10-13 | ��Ϊ��������˾ | Inter-board channel protection method for wavelength division multiplexing system |
| CN1738214A (en) * | 2004-08-17 | 2006-02-22 | 华为技术有限公司 | Inter-board channel protection device and method |
| CN1874201A (en) * | 2006-06-20 | 2006-12-06 | 中兴通讯股份有限公司 | Method and equipment for triggering protection of optical network under shared configuration of receiving devices |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1536805A (en) * | 2003-04-09 | 2004-10-13 | ��Ϊ��������˾ | Inter-board channel protection method for wavelength division multiplexing system |
| CN1738214A (en) * | 2004-08-17 | 2006-02-22 | 华为技术有限公司 | Inter-board channel protection device and method |
| CN1874201A (en) * | 2006-06-20 | 2006-12-06 | 中兴通讯股份有限公司 | Method and equipment for triggering protection of optical network under shared configuration of receiving devices |
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