CN103701519B - The standby usage decision method of EPON - Google Patents
The standby usage decision method of EPON Download PDFInfo
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- CN103701519B CN103701519B CN201310698597.7A CN201310698597A CN103701519B CN 103701519 B CN103701519 B CN 103701519B CN 201310698597 A CN201310698597 A CN 201310698597A CN 103701519 B CN103701519 B CN 103701519B
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Abstract
The invention provides a kind of standby usage decision method of EPON, it adjudicates primary optical interface and optical interface for subsequent use for the optical link protection at EPON, and the method comprises the following steps: optical line terminal receives optical link protection instruction and determines protection group and detect scene state; Obtain the relevant parameter information of optical link in protection group according to detected scene state; Calculate the primary preferred value of each optical interface and select primary optical interface and optical interface for subsequent use according to result of calculation according to obtained relevant parameter information; Select primary optical interface and optical interface for subsequent use according to the primary preferred value of each optical interface in optical link state variation real-time update protection group and according to upgrading result. In the method, the selection of primary optical interface and optical interface for subsequent use changes to calculate primary preferred value to select the most applicable stable primary optical link according to link virtual condition relevant parameter, thereby reduce to greatest extent optical link switching times, safe and reliable optical link path is provided.
Description
Technical field
The present invention relates to passive optical network technique, relate in particular to a kind of standby usage of EPONDecision method.
Background technology
At present, EPON (PassiveOpticalNetwork, PON) technology is based on lightFine broadband optical access technology, optical network system is by optical line terminal (OpticalLineTerminal, OLT), Optical Distribution Network (OpticalDistributionNetwork, ODN)And optical network unit (OpticalNetworkUnit, ONU) composition, due to PON systemThere is the many merits such as high bandwidth, high efficiency, large coverage, user interface be abundant, mostlyNumber operators adopt that this technology realizes that Access Network business is broadband, synthesization transformation, extensiveLayout, obtains a large amount of users and experiences. Can for what optical link was provided in passive optical networkWhen the property depend on is used optical link protection, the selection of primary optical link is most important.
But, generally support the system of optical link protection just to realize merely this function, supportingThe interruption of customer service when optical link defencive function is opened, and in use, to master,The alternative condition of optical interface for subsequent use is considered insufficient and is caused the primary, spare optical interface of system repeatedlySwitch, make system to the support of business off and on, thereby cause user's data security not haveObtain effective guarantee.
Summary of the invention
In view of this, the invention provides one can select optimal link according to Link StateComplete the standby usage decision method of the EPON of optical link defencive function.
A standby usage decision method for EPON, it is for the light chain at EPONIn the protection of road, adjudicate primary optical interface and optical interface for subsequent use, the standby usage of described EPON is sentencedCertainly method comprises the following steps:
Optical line terminal receives optical link protection instruction and determines protection group and detect scene state;
Obtain the relevant parameter information of optical link in protection group according to detected scene state;
Calculate primary preferred value the basis of each optical interface according to obtained relevant parameter informationResult of calculation is selected primary optical interface and optical interface for subsequent use;
According to the primary preferred value of each optical interface in optical link state variation real-time update protection groupAnd select primary optical interface and optical interface for subsequent use according to upgrading result.
Compared with prior art, in EPON standby usage decision method provided by the invention,The primary preferred value of each optical interface is calculated in the selection of primary, spare optical interface according to link virtual conditionTo select the optimal primary optical link of stablizing, simultaneously in running to all Link StatesCarry out automatic monitoring, and select whether to carry out primary, spare PON according to link-state changeThe switching of mouth, thus optical link switching times reduced to greatest extent, provide safe and reliableOptical link path, maintenance customer's data security, reaches the object that optical link is protected conscientiously.
Brief description of the drawings
Fig. 1 is the flow chart of the standby usage decision method of EPON provided by the invention.
Fig. 2 is that in the protection group in Fig. 1, each PON interface status information is collected flow chart.
Fig. 3 is the judgement flow chart of primary, spare PON mouth in the protection group in Fig. 1.
Following detailed description of the invention further illustrates the present invention in connection with above-mentioned accompanying drawing.
Detailed description of the invention
Refer to Fig. 1, its a kind of EPON providing for embodiment of the present invention active and standbyWith decision method, the standby usage decision method of described EPON is used at EPONIn the optical link protection of (PassiveOpticalNetwork, PON), select primary optical interface andOptical interface for subsequent use, the standby usage decision method of described EPON comprises the following steps:
S100: receive optical link protection instruction and determine protection group and detect scene state;
S200: the corresponding ginseng of obtaining each optical link in protection group according to detected scene stateNumber information;
S300: the primary preferred value that calculates each optical interface according to obtained relevant parameter information alsoSelect primary optical interface and optical interface for subsequent use according to result of calculation;
S400: primary excellent according to each optical interface in optical link state variation real-time update protection groupFirst value and according to upgrade result select primary optical interface and optical interface for subsequent use.
In step S100, comprise the following steps:
S110: network management configuration optical link is protected and determined protection group;
S120: judge that PON interface is to belong to protection group, if so, enter step S130, ifNo, finish;
S130: send the PON Link State request of protection group and obtain this configuration scene shapeState.
In step S110, support all PON interface compositions of same optical link defencive functionAn optical link PON protection group, has unique group ID, and network management system configuration optical link is protectedFinger shield order has indicated the unique protection group ID of system, optical line terminal (OpticalLineTerminal, OLT) receive the instruction of configuration optical link defencive function from network management system.
Be understandable that, if newly increased PON interface in protection group ID, newly increasePON interface also can enter optical link defencive function, thereby can be by the mode of progressively upgradingThe optical link defencive function providing, gives full play to optical link defencive function, reduces manual intervention.
In step S130, in the time that OLT receives the instruction of configuration optical link defencive function, beThere are two kinds of possibility application scenarios and detect to distinguish two kinds of application scenarios, first by oneself in systemScene is system initial configuration optical link defencive function, and the second scene is to configure light after system upgradeLink protection function. In the time that system is the first scene, support two of optical link defencive function orUnder multiple PON links, there is no the mandate of ONU, in the time that system is the second scene, support light chainUnder two or more PON links of road defencive function, there is the mandate of ONU.
If system is power up, the instruction of network management system configuration optical link defencive function exists all the timeIn this PON, before ONU authorized order, be issued to OLT system, can decision-making system be nowThe first scene, if not power up continues to detect all of support optical link defencive functionUnder PON mouth, whether there is the mandate of ONU to exist online, be if so, judged to be the second scene, ifNo, be judged to be the first scene. Be appreciated that the first scene can carry out according to engineering layoutPrimary and backup optical interface is selected, and ensures obtain optimum optical link condition and carry out fastUser's access, the second scene more pays attention to ensure the shadow to existing online user in the time of configuration changeRing, will carry out key parameter and relatively decide the selection of primary, spare optical interface, will be to user's shadowRing and reduce to minimum, the user who promotes client experiences.
In the time that PONOLT receives the protection group ID instruction that network management system issues, protection groupFirst each PONOLT in ID gives tacit consent to own state in protection group is state undetermined, withIn time, represents as keyword taking group ID, subsidiary oneself PON interface number information, in system itsHe PONOLT sends the broadcasting packet of PON Link State request, the broadcasting packet sendingCan be received by all PONOLT in system other PONOLT in protection group IDThe PON Link State of self is formed to response message to be responded in the mode of broadcast. If issueIn broadcasting packet, there is initial configuration mark, while showing that this configuration information is system electrifying startupIssue, OLT is in the first scene, otherwise OLT is in the second scene.
In step S200, the relevant parameter information of obtaining in the time that system is the first scene comprises:The priority of all PON interfaces in protection group ID, the interior all PON of protection group ID connectThe business dish information in place at mouth place, the SFP of the interior all PON interfaces of protection group IDWhether (SmallFormfactorPluggable, SFP) optical module is in place, the interior institute of protection group IDThere is the optical fiber connection of PON interface whether to access. Be understandable that, network management system can be specifiedThe priority of PON interface in optical link protection configuration, if network management system specifies optical link to protectProtect the priority of PON interface in configuration,, under equal link condition, network management system refers toThe forward PON interface of fixed priority will become primary PON mouth, if webmaster is not specified elder generationRear order, each PON interface has identical priority.
The relevant parameter information of obtaining in the time that system is the second scene comprises that the first scene need obtainAll parameter informations outside, also further need to obtain the master of PONOLT in protection group,The presence of authorizing ONU under all PON interfaces in stand-by state and protection group ID.
Refer to Fig. 2, in step S200, comprise the following steps:
S210: the Vender information that reads optical module judges that whether optical module is in place, if so,Enter step S220, if not, enter step S220a;
S220: receipts light inefficacy (LossofSingal, the LOS) signal that detects optical module is sentencedWhether disconnected optical fiber accesses, and if so, enters step S230, if not, enters step S230a;
S220a: send this PON mouth optical module to all PON mouths in optical link protection group and do not existPosition status information response message, and enter step S260;
S230: judge whether this configuration is the second scene, if so, enters step S240,If not, enter step S230a;
S230a: send this PON interface optical module to all PON mouths in optical link protection groupIn place and optical fiber is without the response message of access, and enters step S260;
S240: read ONU authorization list in PON interface whether to judge this PON interfaceThere is ONU to authorize, if so, enter step S250, if not, enter step S240a;
S240a: send this PON mouth optical module to all PON mouths in optical link protection group and existPosition, optical fiber access and the response message of authorizing without ONU, and enter step S260;
S250: the ONU reading in PON interface shows online to obtain the number of online ONU;
S250a: send this PON interface optical module to all PON mouths in optical link protection groupIn place, optical fiber accesses, ONU authorizes and the response message of online ONU number, and enters stepRapid S260;
S260: judge whether all PON link-state informations have collected, if so, light chainRoad protection information is collected and is finished and enter step S300, if not, enters step S270;
S270: send PON Link State request message the time delay of protection group ID, optical linkProtection information is collected and is finished and enter step S300.
In step S210, read the Vender information twice of optical module by I2C bus,And whether effectively judging that according to Vender information whether optical module is in place, Vender information hasWhen effect, judge that optical module is in place.
In step S220, read the LOS pipe of optical module by the universal I/O pin of CPUPin signal, if LOS signal is high, shows LOS set, and the PON of PONOLT connectsMouthful up shows that without receiving light optical fiber does not access, now send PON link-state informationResponse message show that this PON Interface status is uncertain, optical module is in place and optical fiber without access, itAfter enter step S260.
In step S230, judge in scene method and step S100 and detect scene status methodIdentical.
In step S250, obtain the presence of authorizing ONU under PON interface, pass throughG.984.3 and 802.3ah the LOS and the LOSi that read PON framing chip judge, according toStandard, PON framing chip instruction LOS shows under this PON interface that all mandate ONUIn presence not, if PON framing chip is not indicated LOS, need furtherDetect the LOSi state of all mandate ONU under this PON interface. According to G.984.3 and802.3ah standard, PON framing chip instruction LOSi shows this ONU upward signal loss,Can be judged to be this ONU not online.
In step S260, according to the configuration optical link protection group receiving in step S100Id information, all PON link-state informations that scanning receives, judge whether to collect complete.
In step S270, in protection group ID, all PON link informations are not collected entirelySituation under, again sending to organize ID is the broadcast of closing the PON Link State request of key indexAfter message time delay, PON link-state information gatherer process finishes. Be understandable that,For the message that prevents loss, also prevent that, due to the sub-frame of cross-system, each system back message using has delay,So need to repeatedly send with time delay and wait for ensureing whether can not judge collection by accident completes, this enforcementIn mode, the time that time delay is waited for is 2 seconds.
Be understandable that, at step S210 to the process of step S250a, each PONInterface receives the link-state information of other PON mouths in protection group. For between support disc or interdepartmentalThe unite optical link defencive function of sub-frame, the information exchange that this locality obtains is crossed management channels and is supported to configurationAll OLT broadcast transmissions of this optical link defencive function, thus all PON interfaces can be total toEnjoy the link-state information of other PON interfaces.
Refer to Fig. 3, in step S300, comprise the following steps:
S310: judge in protection group ID whether had primary PON mouth, if so, enterEnter step S370; If not, enter step S320;
S320: the primary preferred value that calculates each PON interface in protection group;
S330: judge the whether unique maximum of primary preferred value of this PON interface, if so,Enter step S340, if not, enter step S350;
S340: it is primary PON mouth that this PON interface is set, simultaneously primary, spare PON mouthJudgement finishes;
S350: judge this PON interface whether have precedence in protection group, have identical primary preferentialOther PON interfaces of value, if so, enter step S340, if not, enter step S360;
S360: it is PON mouth for subsequent use that this PON interface is set, simultaneously primary, spare PON mouthJudgement finishes.
In step S310, if there is a primary PON mouth in protection group group ID,This PON enters at once PON mouth for subsequent use and does not need to adjudicate, otherwise, according to each linkInformation calculates the primary preferred value of all PON interfaces in this group ID.
In step S320, calculate the primary preferred value of each PON interface in protection group IDPon_info, the PONOLT of protection group ID to the each PON interface in protection group respectivelyParameters pon_info, this pon_info is that type is the array of double byte integer, this arrayEach element preserve one and calculate by the PON interface link status information message receivingNumerical value out, this numerical value is called the primary PON interface preferred value of certain PON mouth, this ginsengThe size of number has determined that this PON interface becomes the priority of primary PON mouth.
Primary PON interface preferred value parameter p on_info is calculated as follows: in protection group IDA PON interface PONi, (1) is not if receive the Link State of this PON interfaceInfomational message, shows that this PON interface place business dish is not in groove position, this PON interfaceThe calculating that this pon_infoi of primary preferred value is 0, pon_infoi finishes, and continues otherwise calculate;(2) if the optical module of PONi interface is in place, the primary preferred value of this PON interface the highestPosition 1, pon_infoi.bit15 puts 1; If the optical module of PONi interface is not in place,Pon_infoi.bit15 sets to 0, and the calculating of pon_infoi finishes, and continues otherwise calculate; (3)If the access of the optical fiber of PONi interface is normal, a time high position for the primary preferred value of this PON interfacePut 1, pon_infoi.bit14 puts 1; If the optical fiber of PONi interface does not access,Pon_infoi.bit14 sets to 0, and the calculating of pon_infoi finishes, and continues otherwise calculate; (4)If in PON interface, have authorize ONU online, the primary preferred value of this PON interface time timeHigh position 1, pon_infoi.bit13 puts 1, otherwise pon_infoi.bit13 sets to 0 and pon_infoiCalculating finish, otherwise calculate continue; (5) if authorize online ONU number in PON interfaceFor N, according to the power budget of the design specification of PON and optical link, maximum light proportion by subtraction is 1:128, so the value of N may be only 0 to 128, the primary preferred value of this PON interface addsN, the bit0 to bit6 of pon_infoi is N for authorizing ONU number online.
In step S330, in this group ID, the primary preferred value of all PON interfaces is maximumThe PON interface of value will become primary PON mouth, and other become PON mouth for subsequent use. For example:A PONi interface, if the business dish at place is in place, and the optical module of PON interface is in place,But this optical module is not inserted optical fiber, and the pon_infoi value of this PON interface is 0x8000 (16System, bit15 puts 1; If another PONj dish is in place, optical module is in place, and optical fiber inserts, andHave 18 ONU online, the value of pon_infoj is 0xe012 (16 system), and 0xe,012 ten enters57362 of system, 0x8000 is metric 32768,0xe012 > 0x8000, so after oneIndividual PON interface has higher priority.
In step S350, if there be the primary preferential of two or more PON interfaces simultaneouslyValue is for maximum, wherein has with the priority setting of the PON mouth of network management system settingPrepreerence PON mouth is primary PON mouth, and other are PON mouth for subsequent use. UnderstandableThat the setting of network management system is manually set as required.
In step S360, all PON mouths for subsequent use are closed the luminous end of SFP optical module,Retain the receipts light end of SFP optical module, and optical link is monitored.
In step S400, the state variation of monitoring PON link according to the link shape changingState calculation of parameter is also upgraded the primary preferred value of each optical interface. When occurring that optical module inserts/extracts,The insertion of optical fiber/extract information, sends local PON interface link and changes broadcasting packet notice groupWhen the interior all PON interfaces of ID, in reception group ID, the Link State of other PON interfaces becomesChange, and calculate the primary preferred value pon_info to upgrade PON interface, computational methods are synchronousRapid 320. In the time that the PON link of for subsequent use mouthful sends variation, other PON in protection group IDInterface upgrades the primary preferred value pon_info that changes PON interface.
Be understandable that, in the time that primary PON interface is unavailable, in protection group ID otherPON interface will be selected primary PON mouth according to step S330, complete primary, spare PONThe switching of mouth.
In EPON standby usage decision method provided by the invention, detect the network-like of realityState and network settings situation, PON interface optimum in selective light link protection becomes primaryPON mouth, carries out automatic monitoring to all Link States, at link simultaneously in runningThe primary preferred value that calculates in real time each PON mouth when changing appears in state is excellent to upgrade spare interfaceFirst order, and select whether to carry out cutting of primary, spare PON mouth according to link-state changeChange, ensure can select optimal optical interface for subsequent use as master in the time that primary optical interface is unavailableWith optical interface, thereby that the system that ensures operates in is the most stable, on the most reliable optical link, reduceBecause the interruption of the customer service that optical link fault causes or interrupted, raising PON systemReliability, provides user's data security, improves customer service and experiences.
Be understandable that, for the person of ordinary skill of the art, can be according to thisBright technical conceive is made other various corresponding changes and distortion, and all these change and changeShape all should belong to the protection domain of the claims in the present invention.
Claims (9)
1. a standby usage decision method for EPON, it is at EPONIn the optical link protection of (PassiveOpticalNetwork, PON), adjudicate primary optical interface andOptical interface for subsequent use, the standby usage decision method of described EPON comprises the following steps:
Optical line terminal receives optical link protection instruction and determines protection group and protect according to optical linkIn the optical link of group, whether exist and authorize optical network unit to detect scene state;
Obtain the relevant parameter information of optical link in protection group according to detected scene state;
Calculate primary preferred value the basis of each optical interface according to obtained relevant parameter informationResult of calculation is selected primary optical interface and optical interface for subsequent use;
According to the primary preferred value of each optical interface in optical link state variation real-time update protection groupAnd select primary optical interface and optical interface for subsequent use according to upgrading result.
2. the standby usage decision method of EPON as claimed in claim 1, its featureBe, comprise the first scene and the second scene at the scene state detecting in scene state step,In described detection scene state step, comprise the following steps:
Detect in optical link protection group whether have mandate optical network unit in optical link, if so,Scene state is the second scene, and if not, scene state is the first scene.
3. the standby usage decision method of EPON as claimed in claim 2, its featureBe, in the relevant parameter information step of obtaining optical link protection group, comprise the following steps:
The relevant parameter information of obtaining in the time that scene state is the first scene comprises: each in protection groupThe priority of optical interface, the corresponding business dish of each optical interface information in place, each optical interfaceWhether optical module optical fiber connection whether in place and each optical interface accesses;
The relevant parameter information of obtaining in the time that scene state is the second scene comprises: in protection groupThe priority of all optical interfaces, the corresponding business dish of each optical interface information in place, each light connectWhether the optical module optical fiber connection whether in place, each optical interface of mouth accesses, optical line terminal existsUnder primary, spare state in protection group and each optical interface, authorize the presence of optical network unit.
4. the standby usage decision method of EPON as claimed in claim 1, its featureBe, calculating the primary preferred value of each optical interface and selecting primary light to connect according to result of calculationIn mouth and optical interface step for subsequent use, comprise the following steps:
Judge in protection group whether have a primary optical interface, if so, each optical interface is standbyWith optical interface, if not, calculate the primary preferred value of each optical interface.
5. the standby usage decision method of EPON as claimed in claim 4, its featureBe, calculating the primary preferred value of each optical interface and selecting primary light to connect according to result of calculationMouthful and the step of optical interface for subsequent use in, by all optical interfaces that calculate in protection group primary preferentiallyThe maximum optical interface of value is set to primary optical interface.
6. the standby usage decision method of EPON as claimed in claim 5, its featureBe, optical line terminal receives the instruction of optical link protection group and comprises appointment optical link protection configurationThe priority of interior optical interface, if there is the primary preferred value of two or more optical interfaces identical simultaneouslyAnd be maximum, wherein there is prepreerence light with the optical interface priority setting of specifying and connectMouth is primary optical interface.
7. the standby usage decision method of EPON as claimed in claim 6, its featureBe, in real-time update protection group, the primary preferred value step of each optical interface comprises following stepRapid:
Each optical interface sends link change state ginseng separately in the time of the state variation of corresponding optical linkNumber is to other optical interfaces in protection group;
The Link State parameter that receives other optical interfaces in protection group changes;
According to the Link State calculation of parameter changing and upgrade the primary preferred value of each optical interface.
8. the standby usage decision method of EPON as claimed in claim 7, its featureBe, according to optical link state variation real-time update protection group, each optical interface is primary preferentialIn value step, in the time that primary optical interface is unavailable by this group in the optical interface of maximum primary preferred valueBe set to primary optical interface.
9. the standby usage decision method of EPON as claimed in claim 8, its featureBe, if there is the primary preferred value of multiple optical interfaces identical and for maximum, to specify simultaneouslyThe setting of optical interface priority wherein to have prepreerence optical interface be primary optical interface.
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| CN104734773B (en) * | 2015-04-16 | 2019-10-01 | 上海斐讯数据通信技术有限公司 | GPON network C class optical link pretection switch optimization method |
| CN111343520A (en) * | 2020-02-27 | 2020-06-26 | 通鼎互联信息股份有限公司 | PON uplink data transmission method, system and device and PON system |
| CN111953412B (en) * | 2020-08-07 | 2022-03-08 | 苏州浪潮智能科技有限公司 | Method and device for realizing optical information synchronization of optical module switch |
| CN115001581B (en) * | 2022-06-16 | 2023-05-16 | 中国联合网络通信集团有限公司 | Optical attenuation processing method, equipment and storage medium of optical network unit |
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