CN1275436C - Method for implementing quick optical fibre protective inversion in ring network and its equipment - Google Patents
Method for implementing quick optical fibre protective inversion in ring network and its equipment Download PDFInfo
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- CN1275436C CN1275436C CNB021290040A CN02129004A CN1275436C CN 1275436 C CN1275436 C CN 1275436C CN B021290040 A CNB021290040 A CN B021290040A CN 02129004 A CN02129004 A CN 02129004A CN 1275436 C CN1275436 C CN 1275436C
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Abstract
The present invention relates to a method and a device thereof for realizing quick optical fiber protective inversion in a ring network. The method comprises the core steps that firstly, a warning message for fiber breakage in spare equipment is informed to main equipment via bottom-layer hardware; then, the main equipment carries out protective inversion on the optical fibers according to the received warning message for the fiber breakage in the spare equipment. The device realizing the method comprises warning detection modules arranged in CPLDs (complex programmable logical devices) of the main and the spare equipment, and a warning detection module channel established to convey the warning message for the fiber breakage generated by a PHY chip to the main equipment successively through the warning detection module of the spare equipment, a serial-parallel conversion module of the spare equipment, and a serial-parallel conversion module of the main equipment. Therefore, the present invention avoids frequent software scheduling, simplifies software process flow, considerably shortens time for protective inversion for the optical fibers in the ring network and guarantees the operating reliability of the ring network.
Description
Technical field
The present invention relates to the computer communication technology field, relate in particular to method and the device thereof of realizing quick optical fibre protective inversion in a kind of looped network.
Background technology
At ATM VPRing (ATM Virtual Path Ring, asynchronous transfer mode Virtual Channel ring) in the looped network solution, the looped network business is inserted by the light mouth of master control borad on the node, master control borad adopts active/standby mode, the centre is connected by cable, adopt LVDS (Low Voltage Differential Signal, low-voltage differential signal) technology to transmit the high speed business between active and standby plate.Through logic determines local service whether, be that local service is then handled by local node after the loop business is inserted by the work route; Not that local service is then transmitted by logic, be transparent to plate, the plate logic is also done transparent transmission handle that business is transmitted again, and this moment, this looped network node was equivalent to transparent path on loop through the LVDS link.For the looped network service node; require host CPU (central processing unit) to respond the optical fiber link fault of work route fast with the protection route; promptly the receive direction optical fiber when protection route and work route opens circuit, and corresponding looped network service node host software can be made fast and switch processing.
For example; existing multi-service is converged discharge device and has been used two master control borads to realize that single-plate grade protection switches in the solution of ATM VPRing; and it is two fine single, double to the transmission ring to support that Bellcore GR-2980 describes; single, double to 1+1,1: 1 wrap protection, support multiplex section protection and path protection.When disconnected fine phenomenon takes place, PHY (physical layer) chip is except that producing alarm indication LOS (signal interruption) or LOF (frame interruption) output, also can report interruption to system, the type (disconnected fine) that interruption takes place is learnt by inquiring about its interrupt register by system, gives the interrupt flag bit zero clearing simultaneously; SDH (SDH (Synchronous Digital Hierarchy)) signal map is finished the processing that the interface loop is professional and protection is switched by FPGA (Field Programmable Gate Array, Field Programmable Gate Array) after becoming ATM (asynchronous transfer mode) cell; FPGA finishes the optical fibre protection inverting basic function, realizes the selection or the bridge joint of optical fiber loop business.
The specific implementation process as shown in Figure 1 together, when the disconnected fibre of mainboard glazing mouth b, PHY layer chip can report by process 1 and interrupt giving bottom ARC (ATM Ring Controller, ATM looped network controller) module, the ARC module is learnt fault type (LOS or LOF), is passed through process 2 clear interrupt flag bits by the corresponding registers of inquiring about this interrupt source, the ARC module is the bottom layer driving module of PHY layer chip and FPGA, finish the collection of alarm and interruption inquiry, handle and report; Do respective handling by process 3 notice upper-layer protocol APS (Automatic Protection Switching, APS) modules then, by process 8 the FPGA register is set by mainboard CPU and carries out optical fiber and switch.The APS module realizes the upper-layer protocol of APS; be used to handle relevant protocol information; it is the bridge that connects CPU and bottom layer driving module; the APS module also is responsible for collecting the warning information that bottom reports simultaneously; it is transmitted to the host software of mainboard; by host software this warning information is carried out respective handling, and report webmaster, to make things convenient for the management of webmaster warning information.When the disconnected fibre of slave board light mouth a, slave board PHY layer chip reports by process 4 and interrupts giving slave board ARC module, slave board ARC module is inquired about interrupt type, is passed through process 5 clear interrupt flag bits, and report slave board APS module by process 6, pass through process 7 (in-band communications) again to the luminous fine failure message of mainboard CPU module, do respective handling by mainboard CPU module, by process 8 the FPGA register be set and carry out optical fiber and switch, receive the light mouth by a to switch for b to.
By above-mentioned prior art as can be seen; disconnected fine alarm to mainboard at present can be easy to accomplish timely response; and can only be by the response of slave board board software docking port chip interrupt to the disconnected fine alarm of slave board; again by in-band channel notice mainboard main frame; then by the host software transmitting order to lower levels; carry out switching operation; this process is owing to be subjected to the time-delay of many places software scheduling; switching time tends at milliseconds up to a hundred; even reach the microsecond level; and the disconnected fine alarm of slave board is uploaded too loaded down with trivial details, often can't satisfy Bellcore GR-2837 standard is no more than 50 milliseconds to protection switch time requirement.
Summary of the invention
The purpose of this invention is to provide method and the device thereof of realizing quick optical fibre protective inversion in a kind of looped network; simplify the upload procedure of the disconnected fine warning information of stand-by equipment in the optical fibre protection inverting, shortened the time that is switched to host apparatus optical fiber by stand-by equipment optical fiber greatly.
The object of the present invention is achieved like this: realize the method for quick optical fibre protective inversion in the looped network, comprising:
A, the disconnected fine alarm information noticing host apparatus that will take place;
B, host apparatus carry out optical fibre protection inverting according to the disconnected fine warning information of receiving;
Comprise among the described step a: the disconnected fine warning information that stand-by equipment takes place is by bottom hardware notice host apparatus.
Described bottom hardware comprises CPLD (Complex ProgramableLogic Device, CPLD) and string and the modular converter in the primary, spare equipment.
The described disconnected fine warning information that stand-by equipment is taken place further comprises by bottom hardware notice host apparatus:
PHY (physical layer) chip in a1, the primary, spare equipment fine disconnected fine alarm information noticing CPLD that produces that will break;
CPLD in a2, the stand-by equipment fine warning information that will break passes to the CPLD of host apparatus successively by string in stand-by equipment and the host apparatus and modular converter;
The CPLD of a3, host apparatus will break and send to APS (APS) module of host apparatus after fine warning information is handled.
Described step a2 comprises:
A21, CPLD judge according to the active and standby signal of its introducing whether CPLD is the CPLD of stand-by equipment after receiving disconnected fine warning information, if, execution in step a22 then, otherwise, execution in step a3;
String and modular converter that a22, the disconnected fine warning information that will receive string and the modular converter by stand-by equipment sends to host apparatus send to the CPLD of host apparatus by host apparatus string and the modular converter fine warning information that will break.
Described step a3 comprises:
After handling the disconnected fine warning information that reports, the CPLD of a31, host apparatus sends to ARC (the ATM looped network controller) module of host apparatus;
The disconnected fine alarm interrupt register of stand-by equipment that a32, the inquiry of ARC module are arranged among the CPLD is determined alarm type, the disconnected fine alarm interrupt flag bit of stand-by equipment among the clear CPLD, and give the APS module this alarming information report, simultaneously, the PHY chip interrupt register of the ARC module inquiry stand-by equipment of stand-by equipment is determined interrupt type, clear stand-by equipment PHY chip interrupt flag bit.
When the described disconnected fine warning information that stand-by equipment is taken place is notified host apparatus by bottom hardware, also comprise:
A4, when disconnected fine warning information takes place, the PHY chip of the stand-by equipment fine warning information that will break sends to self ARC module;
The type of the ARC module query warning information of a5, stand-by equipment, and the interrupt flag bit in the clear PHY chip;
A6, the fine warning information that should break report host apparatus by the APS module.
Described step a also comprises: the ARC module of the disconnected fine alarm information noticing host apparatus that host apparatus is taken place; ARC module query warning type; the PHY chip interrupt flag bit of clear host apparatus; the fine warning information that will break simultaneously sends to the APS module of host apparatus; wherein; the ARC module is the bottom layer driving module of PHY layer chip and FPGA; the PHY chip produces alarm indication signal interruption LOS or frame interrupts LOF output and reports interruption to ARC module and field programmable gate array, and the APS module realizes the upper-layer protocol of APS.
Described step b is: the disconnected fine warning information that host apparatus CPU receives according to the APS module carries out optical fiber by FPGA (Field Programmable Gate Array) and switches.
Realize the device of quick optical fibre protective inversion in a kind of looped network that utilizes said method to realize, its structure comprises: the alarm detection module that comprises respectively among the CPLD of primary, spare equipment, PHY chip and string and modular converter; The alarm detection module respectively with equipment separately in the PHY chip link to each other with string and modular converter, and the string of primary, spare equipment and modular converter are continuous; Promptly set up the disconnected fine warning information that the PHY chip is produced is sent to the alarm detection module of host apparatus successively by alarm detection module, stand-by equipment string and modular converter, host apparatus string and the modular converter of stand-by equipment passage.
The alarm detection module that CPLD comprised that realizes the described primary, spare equipment of device of quick optical fibre protective inversion in the looped network also is provided with active and standby signal leading-in end, is used for determining the type of primary, spare equipment.
By technique scheme as can be seen, the present invention has adopted by the method and apparatus of bottom hardware with the disconnected fine alarm information noticing host apparatus of stand-by equipment generation.Therefore, the present invention has avoided the frequent scheduling of software, has simplified the software processes flow process, has shortened the optical fibre protection inverting time in the ATM VPRing looped network greatly, has guaranteed the reliability of looped network work; Satisfied Bellcore GR-2980 protection switch time has been no more than 50ms and requirement.Advantages such as simultaneously, it is simpler that the present invention also has implementation, and cost is cheaper.
Description of drawings
Fig. 1 is existing optical fibre protection inverting process schematic diagram;
Fig. 2 is an apparatus structure schematic diagram of the present invention;
Fig. 3 is the optical fibre protection inverting process schematic diagram of method of the present invention.
Embodiment
Core of the present invention is that the PHY chip interrupt that the disconnected fibre of stand-by equipment (being slave board) causes is passed to host apparatus (being mainboard) by bottom hardware; and no longer utilize main/slave link to send light mouth failure message to mainboard from slave board APS module; utilized the hardware gate circuit to react characteristics fast; thereby avoided numerous and diverse software processes; shorten protection switch time greatly, guaranteed the loop service security.
Realization of the present invention is at existing active and standby plate CPLD (Complex ProgramableLogic Device, CPLD) increases the alarm detection module in, this module is used to finish the transmission of slave board PHY layer chip warning information to mainboard, the signal transmission is finished by string and modular converter between plate, LVDS (low-voltage differential signal) is used in the transmission of the alarm signal in the circuit, string and modular converter are equivalent to the transparent transmission of signal, and its time-delay is nanosecond.
Therefore, the realization that realizes the device of quick optical fibre protective inversion in the looped network of the present invention mainly is the improvement at the CPLD of active and standby plate, and modular converter increases transmission and the reception that two pins are used for alarm signal in order to go here and there also; As shown in Figure 2, the alarm detection module that is comprised among the CPLD of primary, spare equipment respectively with equipment separately in the PHY chip link to each other with string and modular converter, and the string of primary, spare equipment and modular converter are continuous; Promptly set up the passage that the disconnected fine warning information that the PHY chip produces can be sent to successively the alarm detection module of host apparatus by alarm detection module, stand-by equipment string and modular converter, host apparatus string and the modular converter of stand-by equipment.
The specific design scheme of CPLD is as follows: active and standby plate uses identical logical code, logical code uses VHDL (very-high-speed hardware descriptive language) to describe, by detecting the active and standby signal level that the alarm detection module is introduced, the CPLD that determines the alarm detection module place of receiving alarm signal is mainboard CPLD or slave board CPLD, and carries out different processing in view of the above respectively; That is:
When CPLD is mainboard CPLD, report signal Rx with receiving by string and modular converter input, show that slave board has disconnected fine warning information if report, then with this information to interrupt offering mainboard ARC resume module in form, CPLD disconnected fine alarm interrupt register of inner slave board and corresponding flag bit are set simultaneously, the ARC module is received interrupting information meeting retaking of a year or grade CPLD internal interrupt flag bit, when this moment, CPLD detected the read signal end, gives the flag bit zero clearing.
When CPLD is slave board CPLD, to receive slave board PHY chip alarm signal Alarm, and alarm signal Tx exported to string and modular converter, be transparent to the alarm detection module of mainboard CPLD again by string on the active and standby plate and modular converter, to trigger the corresponding process of mainboard CPLD logic.
The alarm detection module port setting that CPLD increases and being described below:
Alar:in STD_LOGIC; PHY layer chip alarm signal
Act:in STD_LOGIC; The single board main/standby signal
Tx::out STD_LOGIC; Export to string＜-and modular converter
Rx:in STD_LOGIC; By string＜-and the signal of modular converter input
Int:out STD_LOGIC; The disconnected fine alarm of the slave board of output is interrupted
Passed through the improvement and the corresponding setting of above-mentioned hardware, realized in the looped network of the present invention that the embodiment of method of quick optical fibre protective inversion is as follows, referring to Fig. 3:
When the alarm detection module of the CPLD of mainboard or slave board is received the disconnected fine alarm signal of PHY chip, at first need to judge that according to the active and standby signal that the alarm detection module is introduced it is a mainboard alarm detection module, or slave board alarm detection module, and do different processing respectively;
When the disconnected fibre of mainboard light mouth b, be judged result be receive the PHY chip disconnected fine alarm signal be mainboard alarm detection module, the handling process of alarm is same as the prior art, be about to mainboard PHY chip and report the ARC module by process 21 by the interruption that disconnected fine alarm produces, ARC module inquiry interrupt type, and by process 22 clear PHY chip interrupt flag bits, to interrupt reporting the APS module by process 23 then handles, by process 211 the FPGA register being set according to the result of APS module by CPU carries out optical fiber and switches, like this, the work routing switch is by slave board light mouth a received signal;
When the disconnected fibre of slave board light mouth a, be judged result be receive the PHY chip disconnected fine alarm signal be slave board alarm detection module, then slave board PHY chip reports by process 212 and interrupts giving the ARC module, ARC module inquiry interrupt type, and by process 29 clear PHY chip internal interrupt flag bits, again interruption is reported the APS module, the APS module only is transmitted to the mainboard host software to the interruption that disconnected fine alarm causes, by host software this warning information is carried out respective handling, and report webmaster, making things convenient for the management of webmaster to warning information, and the CPU by slave board does not send out main/slave link message and gives mainboard; In the disconnected fibre of slave board light mouth a, the PHY chip is exported disconnected fine alarm signal and is inputed to the alarm detection module of slave board CPLD by process 24, it is slave board that the alarm detection module of slave board CPLD detects this plate, then can be with alarm signal by process 25,26,27, promptly be transparent to the alarm detection module of mainboard CPLD by string and modular converter, CPLD handles by mainboard, the alarm signal that mainboard CPLD uploads slave board by process 28 to interrupt offering mainboard ARC module in form, the inquiry of ARC module is arranged on the disconnected fine alarm interrupt register of slave board of mainboard CPLD inside, clear interrupt flag bit, to interrupt reporting the APS module by process 23 again handles, by process 211 the FPGA register being set by CPU carries out optical fiber and switches, like this, the work routing switch is by mainboard light mouth b received signal.
Analyze disconnected fine detection of alarming of above active and standby plate and processing procedure as can be known, the alarm signal that the PHY chip reports not is all to be to be caused by disconnected fibre, therefore, the alarm detection module need shield the interruption of other type alarm triggered, and only make the highest disconnected fine alarm of priority can trigger alarm signal, all cause to guarantee the alarm signal that slave board reports for the fibre that breaks by slave board.
In method of the present invention; avoided of the processing of slave board software to alarm signal; and avoided uploading alarm signal and given mainboard APS module by in-band communications; but by process 24,25,26,27,28; promptly carry out uploading of alarm signal by bottom hardware, therefore time-delay is in nanosecond; the uplink time of the disconnected fine alarm of slave board can be shortened to Millisecond, shorten the time that protection is switched greatly.
Claims (10)
1, realize the method for quick optical fibre protective inversion in a kind of looped network, comprising:
A, the disconnected fine alarm information noticing host apparatus that will take place;
B, host apparatus carry out optical fibre protection inverting according to the disconnected fine warning information of receiving;
It is characterized in that comprising among the described step a: notify host apparatus by bottom hardware with the disconnected fine warning information that stand-by equipment takes place.
2, realize the method for quick optical fibre protective inversion in the looped network according to claim 1, it is characterized in that described bottom hardware comprises complex programmable logic device (CPLD) and string and the modular converter in the primary, spare equipment.
3, realize the method for quick optical fibre protective inversion in the looped network according to claim 2, it is characterized in that the described disconnected fine warning information that stand-by equipment is taken place further comprises by bottom hardware notice host apparatus:
PHY chip in a1, the primary, spare equipment fine disconnected fine alarm information noticing CPLD that produces that will break;
CPLD in a2, the stand-by equipment fine warning information that will break passes to the CPLD of host apparatus successively by string in stand-by equipment and the host apparatus and modular converter;
The CPLD of a3, host apparatus will break and send to the APS APS module of host apparatus after fine warning information is handled.
4, realize the method for quick optical fibre protective inversion in the looped network according to claim 3, it is characterized in that described step a2 comprises:
A21, CPLD judge according to the active and standby signal of its introducing whether CPLD is the CPLD of stand-by equipment after receiving disconnected fine warning information, if, execution in step a22 then, otherwise, execution in step a3;
String and modular converter that a22, the disconnected fine warning information that will receive string and the modular converter by stand-by equipment sends to host apparatus send to the CPLD of host apparatus by host apparatus string and the modular converter fine warning information that will break.
5, according to the method that realizes quick optical fibre protective inversion in claim 3 or the 4 described looped networks, it is characterized in that described step a3 comprises:
After handling the disconnected fine warning information that reports, the CPLD of a31, host apparatus sends to the ATM looped network controller ARC module of host apparatus;
The disconnected fine alarm interrupt register of stand-by equipment that a32, the inquiry of ARC module are arranged among the CPLD is determined alarm type, the disconnected fine alarm interrupt flag bit of stand-by equipment among the clear CPLD, and give the APS module this alarming information report, simultaneously, the PHY chip interrupt register of the ARC module inquiry stand-by equipment of stand-by equipment is determined interrupt type, clear stand-by equipment PHY chip interrupt flag bit.
6, realize the method for quick optical fibre protective inversion in the looped network according to claim 3, it is characterized in that: when the described disconnected fine warning information that stand-by equipment is taken place is notified host apparatus by bottom hardware, also comprise:
A4, when disconnected fine warning information takes place, the PHY chip of the stand-by equipment fine warning information that will break sends to self ARC module;
The type of the ARC module query warning information of a5, stand-by equipment, and the interrupt flag bit in the clear PHY chip;
A6, the fine warning information that should break report host apparatus by the APS module.
7; realize the method for quick optical fibre protective inversion in the looped network according to claim 1; it is characterized in that described step a also comprises: the ARC module of the disconnected fine alarm information noticing host apparatus that host apparatus is taken place; ARC module query warning type; the PHY chip interrupt flag bit of clear host apparatus; the fine warning information that will break simultaneously sends to the APS module of host apparatus; wherein; the ARC module is the bottom layer driving module of PHY layer chip and FPGA; the PHY chip produces alarm indication signal interruption LOS or frame interrupts LOF output and reports interruption to ARC module and field programmable gate array, and the APS module realizes the upper-layer protocol of APS.
8, realize the method for quick optical fibre protective inversion in the looped network according to claim 7, it is characterized in that described step b is: the disconnected fine warning information that host apparatus CPU receives according to the APS module carries out optical fiber by field programmable gate array FPGA and switches.
9, realize the device of quick optical fibre protective inversion in a kind of looped network that utilizes the described method of claim 1 to realize, it is characterized in that: increase is provided with the alarm detection module respectively in the CPLD of primary, spare equipment, the alarm detection module respectively with active and standby equipment in the PHY chip link to each other with string and modular converter, and the string of primary, spare equipment and modular converter are continuous; Promptly set up the disconnected fine warning information that the PHY chip is produced is sent to the alarm detection module of host apparatus successively by alarm detection module, stand-by equipment string and modular converter, host apparatus string and the modular converter of stand-by equipment passage.
10, realize the device of quick optical fibre protective inversion in the looped network according to claim 9; the alarm detection module that CPLD comprised that it is characterized in that described primary, spare equipment also is provided with active and standby signal leading-in end, is used for determining the type of primary, spare equipment.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB021290040A CN1275436C (en) | 2002-08-23 | 2002-08-23 | Method for implementing quick optical fibre protective inversion in ring network and its equipment |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB021290040A CN1275436C (en) | 2002-08-23 | 2002-08-23 | Method for implementing quick optical fibre protective inversion in ring network and its equipment |
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| CN1477797A CN1477797A (en) | 2004-02-25 |
| CN1275436C true CN1275436C (en) | 2006-09-13 |
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| CNB021290040A Expired - Fee Related CN1275436C (en) | 2002-08-23 | 2002-08-23 | Method for implementing quick optical fibre protective inversion in ring network and its equipment |
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Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100352226C (en) * | 2004-12-13 | 2007-11-28 | 华为技术有限公司 | Method for realizing M:N looped network protection switching operation |
| CN101964681B (en) * | 2009-07-22 | 2013-08-21 | 中兴通讯股份有限公司 | Device and method for detecting alarm by interruption |
| WO2012106890A1 (en) * | 2011-07-14 | 2012-08-16 | 华为技术有限公司 | Signal processing method and slave device |
| CN102638735B (en) * | 2012-04-13 | 2015-07-01 | 瑞斯康达科技发展股份有限公司 | Optical node device and business switching method thereof |
| CN104660326A (en) * | 2015-02-13 | 2015-05-27 | 田勐 | High-speed and automatic SDH (synchronous digital hierarchy) switching method and device based on channel quality |
| CN106506074B (en) * | 2016-10-12 | 2019-02-19 | 杭州迪普科技股份有限公司 | A kind of method and apparatus detecting optical port state |
| CN107734404B (en) * | 2017-09-21 | 2020-06-16 | 烽火通信科技股份有限公司 | FPGA-based wave division equipment electrical layer protection implementation system and method |
| CN112398530B (en) * | 2020-11-02 | 2022-02-15 | 中国联合网络通信集团有限公司 | Method and device for determining fiber breaking position |
| CN116055249B (en) * | 2023-02-02 | 2024-09-10 | 杭州和利时自动化有限公司 | Bus communication system, control method, device and medium thereof |
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