CN1859182A - Method for edition upgrading of optical network unit ONU - Google Patents
Method for edition upgrading of optical network unit ONU Download PDFInfo
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- CN1859182A CN1859182A CN 200510121307 CN200510121307A CN1859182A CN 1859182 A CN1859182 A CN 1859182A CN 200510121307 CN200510121307 CN 200510121307 CN 200510121307 A CN200510121307 A CN 200510121307A CN 1859182 A CN1859182 A CN 1859182A
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Abstract
The present invention discloses a method for updating version to optical network unit ONU. Said method includes 1, loading the to be updated ONU version file to optical link terminal OLT; 2, optical link terminal OLT transmitting said updating version file to optical network unit ONU through OMA protocol. The present invented updating operational process are all completed in office end equipment OLT by professional equipment attendant, without terminal providing TCP/IP protocol stack, and capable of batch updating.
Description
Technical field
The present invention relates to Ethernet passive optical-fiber network (EPON) field, in particular, relate to the method that the version file of operation in the optical network unit (ONU) of user side among the EPON is upgraded.
Background technology
Ethernet passive optical-fiber network (EPON) is the single fiber bi-directional Optical Access Network that multiple spot (P2MP) structure is put in a kind of employing, its canonical topology structure is the tree type, system configuration is as shown in Figure 1: the EPON system is made up of the optical line terminal (OLT) of local side, the optical network unit (ONU) and the Optical Distribution Network (ODN) of user side, is the single fiber bi-directional system.At down direction (OLT is to ONU), the signal that OLT sends arrives each ONU by the passive optical splitter (or cascade of several splitters) of a 1:n.At up direction (ONU is to OLT), the signal of an ONU transmission only can arrive OLT, and can not arrive other ONU.For fear of data collision and improve network utilisation efficient, up direction adopts the TDMA access mode and the data of each ONU is sent and arbitrates.ODN provides one or more optical channel between an OLT and one or more ONU, each optical channel is limited in the specific wavelength window.Owing to be passive shunt, therefore taked special measure to guarantee confidentiality and fail safe.
The protocol hierarchy of EPON system and and the ISO/IEC OSI Reference Model between relation as shown in Figure 2, network management in the EPON system (OAM) sublayer is arranged in the second layer of osi model, and it provides a kind of mechanism of maintaining network operational management between OLT and the ONU.Though in gigabit Ethernet, OAM is not formulated agreement, but because EPON belongs to the Access Network category, the service provider need increase OAM(Operation Administration Maintenance) in EPON, so that adapt to the network demand for services of following high reliability, therefore need to formulate new clause with definition OAM content.OAM need be achieved as follows several functions in the EPON system:
1) the far-end fault shows, the announcement local terminal, and the receiving loop of local device has fault;
2) remote loop test provides the loopback test of data link layer frame mode;
3) link monitoring provides the ability of the event notification that has diagnostic message, supports the poll of IEEE802.3MIB is checked;
4) allow user's expansion so that the upper strata is managed more easily.
The 4th function of above-mentioned OAM comprises that specifically network management, data configuration and version load or the like, the version file that ONU is gone up operation is upgraded and is belonged to one of the 4th above-mentioned function, the version file of the last operation of ONU generally leaves among the FLASH, after ONU powers on the version file among the FLASH is loaded in the internal memory, version file in the running memory then, ONU just can move like this, finishes miscellaneous service.
After the version file issue that moves in new ONU, the user is with regard to the version file among the FLASH that needs renewal ONU.The existing general upgrade method of ONU terminal is undertaken by the ONU upper layer software (applications), the user is by behind the computer internet, up-to-date version file is downloaded to computer according to the model of ONU in website to the equipment supplier, computer and ONU interconnect by ethernet line, log on the administration page of ONU then, the particular version ROMPaq of operation ONU, by network the latest edition file transfer on the computer is arrived ONU, the ONU handling procedure writes FLASH to version file, the ONU version file just is updated like this, and the latest edition file just can be moved in the back of ONU startup next time by the time.
Also having a kind of upgrade method in the existing upgrade method is to upgrade by Xmodem Protocol, this upgrade method needs computer and ONU to interconnect by serial ports, open hyper terminal on computers and be connected to ONU, then the latest edition file is transferred to ONU by Xmodem Protocol, be written to FLASH then, new version file just can be moved in ONU startup next time back.
Two kinds of above-mentioned upgrading schemes have a common characteristic, they all be by ONU and subscriber computer interconnected after, obtain up-to-date version file from computer, the version file that upgrades then among the FLASH reaches the upgrading purpose, that is to say that above-mentioned two kinds of upgrading schemes are all carried out at user side.But these two kinds of schemes all have deficiency separately:
First kind of solution, interconnect by Ethernet between ONU and the computer, ONU obtains version file by transmission control protocol (TCP) or User Datagram Protoco (UDP) (UDP) from computer, this method is more common, nearly all terminal equipment can be upgraded by this method, but this upgrade method has individual precondition, ONU must support the ICP/IP protocol stack, SOCK is provided interface, provide the workload of these agreements very big on the one hand, increased the CPU burden of ONU, in addition on the one hand, generally all do not provide the ICP/IP protocol stack for initial stage terminal equipment or dumb terminal equipment, just can not upgrade by this method;
Second kind of solution, interconnect by serial ports between ONU and the computer, this mode for professional requirement than higher, generally use at the product development initial stage, and the Serial Port Line that uses does not generally offer the user, therefore the user also has no idea to use this upgrading mode, and this upgrading mode uses is Xmodem Protocol, transmits very slow several times.
Summary of the invention
The object of the present invention is to provide a kind of method that optical network unit (ONU) is carried out edition upgrading, to solve in the prior art at user side to the version file of the ONU inconvenient problem of upgrading.
For achieving the above object, technical scheme of the present invention is achieved in that a kind of method that optical network unit ONU is carried out edition upgrading, and this method comprises following step:
A, the update version document of intending running on optical network unit ONU is loaded into optical line terminal OLT;
B, described optical line terminal OLT are transferred to optical network unit ONU with described update version document by NMP OMA.
Wherein step a is described is loaded into optical line terminal OLT with update version document and realizes by TFTP TFTP.
Wherein also comprise before the step b:
1. optical line terminal OLT sends OMA version querying message to optical network unit ONU;
2. optical network unit ONU comprises receiveing the response of its current version information to the optical line terminal OLT transmission after receiving described OMA version querying message;
3. optical line terminal OLT after receiving described receiveing the response compares optical network unit ONU current version information and described upgraded version information, if it is consistent then finish upgrading to described optical network unit ONU, handle next online ONU, if inconsistent then carry out step b.
The identification of the manufacturer that wherein comprises optical line terminal OLT in the 1. described version querying message of step; The 2. described optical network unit ONU of step receives after the described version querying message with the identification of the manufacturer of described optical line terminal OLT and the identification of the manufacturer of self relatively, finish upgrading to described optical network unit ONU if both are inconsistent, handle next online ONU, if unanimity then carry out step 3..
The identification of the manufacturer of the optical line terminal OLT that comprises in the wherein said version querying message is to be represented by the special field of an increase in the OAM message.
Wherein step b specifically comprises:
B1, optical line terminal OLT send OMA update version document length message to optical network unit ONU, and optical network unit is prepared to deposit the memory space of described update version document and respond acknowledge message according to the update version document length message;
B2, optical line terminal OLT send the OMA data transmission message to optical network unit ONU, transmit described update version document data, after optical network unit ONU receives with the deposit data in the described data transmission message at described memory space and respond response message.
Wherein step b2 specifically comprises: described OMA data transmission message comprises data size field and offset field, after ONU receives described data transmission message, the deposit data in the described data transmission message is arrived described memory space according to size of data and skew.
Wherein step b2 repeats once according to the size of update version document or once, sends until the total data of described update version document to finish.
After the total data of wherein said update version document sent and finishes, optical line terminal OLT sent an end to optical network unit ONU, and ONU responds end, and OLT begins the online ONU of the next one is upgraded after receiving response message.
Wherein the update version document length message described in the step b1 comprises update version document length field and check information.
After the total data of described update version document sends, optical network unit ONU is carried out checking treatment to the data that received and check results and described check information is compared, if both are inequality, the supporting paper transmission has problem, the upgrading failure, treat next round or upgrading again next time,, version file is write among the FLASH of ONU if identical.
The present invention is directed to the deficiencies in the prior art, provide a kind of brand-new to ONU edition upgrading solution, obtain the latest edition file of ONU by the OAM agreement from local side apparatus OLT, by OLT this version file is sent to ONU then, then this version file is write among the FLASH of ONU.Updating operation process of the present invention is all finished by the plant maintenance personnel of specialty on local side apparatus OLT, data transmission bauds is fast, and is low to demanding terminal, do not need terminal that the ICP/IP protocol stack is provided, but also can batch upgrade, all online ONU of this OLT subordinate once can upgrade.
Description of drawings
Fig. 1 is an EPON general-purpose system structure chart;
Fig. 2 is the graph of a relation between EPON protocol hierarchy and OSI Reference Model;
Fig. 3 is an embodiment of the invention flow chart;
Fig. 4 is OAM message general format figure of the present invention;
Fig. 5 is OAM version querying message format figure;
Fig. 6 is OAM file size message format figure;
Fig. 7 is an OAM data transmission message format chart;
Fig. 8 sends the end format chart for the OAM data.
Specific embodiment
The present invention is described in detail below in conjunction with specific embodiments and the drawings.
Basic procedure to the version file upgrade method moved among the ONU provided by the invention is: at first local side apparatus OLT is loaded into OLT, can pass agreement (Trivial File TransferProtocol TFTP) by simple files and finish loading, on OLT, carry out ONU upgrading order then, this moment, OLT was transferred to all online ONU to the ONU version file by the OAM agreement, after ONU is received update version document, update version document is write its FLASH, and ONU has just brought into operation redaction after the startup next time.
General OLT equipment all can provide the ICP/IP protocol stack, and the plant maintenance personnel can be transferred to OLT to update version document from computer by the TFTP agreement, and therefore being easy to an ONU update version document is loaded into OLT.This process is a technology well known to those skilled in the art, does not make emphasis in the present invention and describes.
Stress that below update version document is transferred to the process of ONU from OLT, the problem that at first needs to solve is how to guarantee the consistency of OLT and ONU, if OLT and ONU are not the equipment of same manufacturer, and the reception version file that ONU can't be correct.The OLT and the ONU (it is called identification of the manufacturer for convenience of description) that represent each manufacturer to produce by special field of increase in the OAM message that sends to ONU at OLT in the present embodiment solve OLT and ONU consistency problem, each manufacturer uses different signs, when the identification of the manufacturer of the identification of the manufacturer in the message and ONU is identical, illustrate that OLT and ONU belong to same manufacturer and provide, can normal communication between OLT and the ONU.OAM general message form is (all the elements that do not comprise the OAM message format among the figure as shown in Figure 4, the little field of other and relation of the present invention is not listed, back OAM message format is similar), the front end of this message is " identification of the manufacturer ", be " OMA message content " thereafter, certainly " identification of the manufacturer " position in message might not be in the message foremost, its length does not have special requirement yet, in the OAM agreement this there is not yet special provision, therefore this field can be stipulated voluntarily by each manufacturer, is the message that this manufacturer equipment sends as long as can identify.
By in OAM message, increasing identification of the manufacturer, specify the flow process of mutual message between OLT and the ONU and the concrete form of message below with after guaranteeing the consistency between OLT and the ONU.As shown in Figure 3, at first OLT sends version querying message to ONU, this message is mainly used in and determines whether and need carry out edition upgrading to this ONU, if the ONU version has been up-to-date or version does not match and just do not need upgrading, has also comprised the identification of the manufacturer of OLT in addition in this message.After ONU receives version querying message, at first the identification of the manufacturer of OLT and the identification of the manufacturer of self are compared, show that if both are inconsistent OLT and this ONU do not belong to the product of same manufacturer, upgrading can not continue, ONU increases the inconsistent information of identification of the manufacturer in following receiveing the response, OLT finishes the upgrading to this ONU in view of the above, inquires about next online ONU and it is upgraded; Produce if both consistent OLT of showing and ONU belong to same manufacturer, can carry out normal communication, ONU obtains self current version information, inserts in the back message using, again response message is sent to OLT.OLT after receiving response message compares the current version information of ONU and the version information of intending upgrading, if do not need upgrading just to handle next online ONU, otherwise the escalation process below continuing.Its message format is as shown in Figure 5: comprise aforesaid " identification of the manufacturer " and " version querying request " in the version querying message structure, ONU response message structure comprises " identification of the manufacturer ", " version querying response " and " version information ".
If the identification of the manufacturer in the query messages is identical with the identification of the manufacturer of ONU, and OLT judges that by the version information in the response message this ONU need upgrade version, then OLT sends next message to this ONU, and with the length of update version document, and check information sends to ONU.Wherein the file size field makes ONU know the size of upgrade file, thereby can prepare to deposit the space of upgrade file; Check information can guarantee to be transferred to from OLT the correctness of the upgrade file of ONU.After ONU receives this message, respond an acknowledge message, concrete message structure as shown in Figure 6.
After OLT receives above-mentioned affirmation message, next just can send the upgrade file content, upgrade file is general bigger, an OAM message can not all comprise, so need several times upgrade file to be sent to ONU, therefore also to comprise the data size field that this message sends, the offset field of data in whole upgrade file in each message.Data size field indicates the size of these transmission of messages data, and offset field indicates the position of these transmission of messages data, can conveniently realize the re-transmission of this message.After ONU receives data transmission message, according to size of data and skew the deposit data in the message to the preprepared upgrade file space of depositing.ONU responds a response message to OLT after having deposited a data message at every turn, after OLT receives this response message, continues to send next data-message to ONU, up to sending all data.Can't receive response message if OLT is interior at certain time intervals, just retransmit this data message.The data transmission message form as shown in Figure 7.
After sending whole update version document, OLT sends an end as shown in Figure 8 to ONU again, after ONU receives end, sends one immediately and receives the response to OLT, finish edition upgrading process after OLT receives and receives the response, continue the next online ONU of upgrading this ONU.Simultaneously, ONU sends the back of receiveing the response and carries out checking treatment to receiving data, and the check information that check results and OLT are begun to send compares, if both are inequality, the supporting paper transmission has problem, and next round or upgrading are again next time treated in the upgrading failure; If identical, version file is write among the FLASH, the version file after will upgrading during ONU startup next time is loaded in the internal memory and moves new version file, and upgrading is just successful like this.
Claims (11)
1, a kind of method that optical network unit ONU is carried out edition upgrading is characterized in that, this method may further comprise the steps:
A, the update version document of intending running on optical network unit ONU is loaded into optical line terminal OLT;
B, described optical line terminal OLT are transferred to optical network unit ONU with described update version document by NMP OMA.
2, the method that optical network unit ONU is carried out edition upgrading according to claim 1 is characterized in that, step a is described to be loaded into optical line terminal OLT with update version document and to realize by TFTP TFTP.
3, the method that optical network unit ONU is carried out edition upgrading according to claim 1 is characterized in that, also comprises before the step b:
1. optical line terminal OLT sends OMA version querying message to optical network unit ONU;
2. optical network unit ONU comprises receiveing the response of its current version information to the optical line terminal OLT transmission after receiving described OMA version querying message;
3. optical line terminal OLT after receiving described receiveing the response compares optical network unit ONU current version information and described upgraded version information, if it is consistent then finish upgrading to described optical network unit ONU, handle next online ONU, if inconsistent then carry out step b.
4, the method that optical network unit ONU is carried out edition upgrading according to claim 1 is characterized in that, wherein step b specifically comprises:
B1, optical line terminal OLT send OMA update version document length message to optical network unit ONU, and optical network unit is prepared to deposit the memory space of described update version document and respond acknowledge message according to the update version document length message;
B2, optical line terminal OLT send the OMA data transmission message to optical network unit ONU, transmit described update version document data, after optical network unit ONU receives with the deposit data in the described data transmission message at described memory space and respond response message.
5, the method that optical network unit ONU is carried out edition upgrading according to claim 3 is characterized in that, comprises the identification of the manufacturer of optical line terminal OLT in the 1. described version querying message of step; The 2. described optical network unit ONU of step receives after the described version querying message with the identification of the manufacturer of described optical line terminal OLT and the identification of the manufacturer of self relatively, finish upgrading to described optical network unit ONU if both are inconsistent, handle next online ONU, if unanimity then carry out step 3..
6, the method that optical network unit ONU is carried out edition upgrading according to claim 5 is characterized in that, the identification of the manufacturer of the optical line terminal OLT that comprises in the described version querying message is to be represented by the special field of an increase in the OAM message.
7, method of optical network unit ONU being carried out edition upgrading according to claim 4, it is characterized in that, wherein step b2 specifically comprises: described OMA data transmission message comprises data size field and offset field, after ONU receives described data transmission message, the deposit data in the described data transmission message is arrived described memory space according to size of data and skew.
8, method of optical network unit ONU being carried out edition upgrading according to claim 4, it is characterized in that, wherein step b2 repeats once according to the size of update version document or once, sends until the total data of described update version document to finish.
9, according to claim 4 or 8 described methods of optical network unit ONU being carried out edition upgrading, it is characterized in that, after the total data of described update version document sends and finishes, optical line terminal OLT sends an end to optical network unit ONU, ONU responds end, and OLT begins the online ONU of the next one is upgraded after receiving response message.
10, the method that optical network unit ONU is carried out edition upgrading according to claim 4 is characterized in that, wherein the update version document length message described in the step b1 comprises update version document length field and check information.
11, method of optical network unit ONU being carried out edition upgrading according to claim 10, it is characterized in that, after the total data of described update version document sends, optical network unit ONU is carried out checking treatment to the data that received and check results and described check information is compared, if both are inequality, the supporting paper transmission has problem, the upgrading failure, treat next round or upgrading again next time,, version file is write among the FLASH of ONU if identical.
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