CN101150367A - A backup method and device for passive optical network OLT device - Google Patents
A backup method and device for passive optical network OLT device Download PDFInfo
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- CN101150367A CN101150367A CNA200710166383XA CN200710166383A CN101150367A CN 101150367 A CN101150367 A CN 101150367A CN A200710166383X A CNA200710166383X A CN A200710166383XA CN 200710166383 A CN200710166383 A CN 200710166383A CN 101150367 A CN101150367 A CN 101150367A
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Abstract
This invention discloses a backing up method for passive optical network (PON) optical line terminals (OLT) including: setting up PON back-up groups, and different PON back-up groups include different PON ports, selecting a master PON port and a back-up port and backing up the information in the master port into said back-up port. This invention discloses OLT devices and makes exchange protected back up to trunk routes between OLT devices by notifying and backing up messages to avoid leading new fault points and increase stability of the system.
Description
Technical field
The present invention relates to communication technical field, relate in particular to a kind of backup method and equipment of device for passive optical network OLT.
Background technology
The development of the rise of the Internet, especially multimedia service has caused people that the demand of bandwidth is day by day increased, and traditional copper cable access technology has been difficult to adapt to the demand that high bandwidth inserts.Based on the access technology of optical fiber have that high bandwidth, long-distance transmissions ability are strong, advantage such as good confidentiality, antijamming capability are strong, can adapt to the demand of present and following business development to bandwidth, become the main implementation technique of Access Network.In various optical fiber access technologies, PON (passive optical network, EPON) is because advantages such as easy care, high bandwidth, low cost become the preferred version in the light access technology.Along with the increase of broadband access network service, the needs of some Very Important Person networkings especially seem extremely important to the protection of PON system.
EPON (Ethernet PON, Ethernet passive optical network) and GPON (Gigabit-capable PON, Gigabit Passive Optical Network) is the technology of two tool advantages in the PON technology, become operator and build FTTH (Fiber To The Home, Fiber to the home), the first-selected system configuration taked of FTTB Optical Access Networks such as (Fiber To The Building, Fiber-To-The-Building).Wherein, the FTTH system configuration as shown in Figure 1, Network Management Equipment, authentication and accounting equipment and OLT (Optical Line Terminal, optical line terminal) by the communication of IP metropolitan area network, OLT is by the cross-connecting box of community center's machine room and POS (the Passive Optical Splitter of each building, the passive fiber splitter) connect, each POS connects by the ONU in fiber distribution box and the building (Optical Network Unit, optical network unit).
For the fail safe of systems such as FTTH, the protection scheme of switching of the tree of EPON and GPON is arisen at the historic moment, and the POS with the POS of 2:N substitutes original 1:N carries out two fine backups.For example, use 1 * 2 optical switch that trunk optical fiber and backup optical fiber are implemented to switch protection at OLT PON mouth; Adopt double-PON port or two OLT board back-ups etc. at OLT equipment, the devastating impact that guard method all can't protect the OLT equipment failure to bring is switched in these backups.
In order to solve the problem of OLT equipment failure, can carry out dual-host backup to OLT equipment.At present; there has been a kind of EPON trunk optical fibre protection inverting equipment can realize dual-host backup; this protection switching equipment is between two OLT equipment and the POS; OLT equipment downlink optical fiber and all be connected on this protection switching equipment from the up active and standby optical fiber of POS is carried out the active and standby switching of OLT and the switching of active and standby optical fiber by this protection switching equipment by the situation of judging the up-downgoing light signal.
Yet also there is major defect in this dual-host backup: introduced this new fault point of protection switching equipment.Because this protection switching equipment is an active equipment, various faults may occur in the maintenance of hardware and software; And because this protection switching equipment present position must cause whole Access Network all unavailable in case hardware and software failure occurs.
In addition, owing to may insert dozens of ONU under a PON mouth, these ONU facility registrations and configuration can make the OLT facility load very heavy, and the software and hardware upgrading of OLT all can need for a long time, and business can't be runed during upgrading.
Summary of the invention
The embodiment of the invention provides a kind of backup method of device for passive optical network OLT, and described method comprises two parts function: PON group back mechanism and wrap protection.By notification packet and backup message the protection backup is switched in PON trunk path between the OLT equipment.
Wherein, the PON group back mechanism in the backup method of passive optical network optical line terminal OLT equipment is applied to comprise in the EPON of at least two OLT equipment, said method comprising the steps of:
Set up the passive optical network PON backup group, different PON backup groups comprise different PON ports respectively;
Elect the main PON port in the described PON backup group and be equipped with the PON port;
With the information back-up of the main PON port in the described PON backup group to the described PON port that is equipped with, specifically comprise OLT equipment under the main PON port in the PON backup group in described PON backup group be equipped with the PON port under OLT equipment send the backup message.
Main PON port in the described PON backup group of described election and be equipped with the PON port by the mutual notification packet realization of local terminal OLT equipment and opposite end OLT equipment.
Describedly specifically comprise by electing the main PON port in the described PON backup group and be equipped with the PON port with the opposite end mutual notification packet of OLT equipment:
Local terminal OLT equipment sends the notification packet of each PON backup group respectively to opposite end OLT equipment, comprises PON backup group information and precedence information in the described notification packet;
Local terminal OLT equipment receives the notification packet that opposite end OLT equipment sends, the PON port priority information of more described opposite end OLT equipment and the PON port priority information of local terminal OLT equipment, if the PON port priority height of local terminal OLT equipment, local terminal PON port in the then described PON backup group is main PON port, and opposite end PON port is for being equipped with the PON port.
The notification packet that described local terminal OLT equipment receives opposite end OLT equipment transmission also comprises afterwards:
When being equipped with the PON port priority and being higher than main PON port, judge the attribute of described PON backup group, if contention mode, then being equipped with the PON port switching is main PON port; If be non-contention mode, then be equipped with the PON port and keep current state.
Described information back-up with the main PON port in the described PON backup group also comprises to the described PON port that is equipped with before:
Send backup request by OLT equipment under the PON port fully of OLT equipment under the main PON port in the described PON backup group in the PON backup group, and receive the described backup response that the affiliated OLT equipment of PON port returns that is equipped with.
Described information back-up with the main PON port in the described PON backup group also comprises after the PON port fully to described:
Send backup by OLT equipment under the PON port fully of OLT equipment under the main PON port in the described PON backup group in the PON backup group and finish message;
Receive the backup check message that the affiliated OLT equipment of PON port returns that is equipped with in the PON backup group, carry check value in the described backup verification message;
Described check value and local terminal information calculations value are compared,, then back up successfully,, then resend backup messages if inconsistent if consistent.
Main PON port in the described election PON backup group and be equipped with the PON port after also comprise:
OLT equipment periodic OLT equipment under being equipped with the PON port sends notification packet under the main PON port in the described PON backup group.
Wherein, the wrap protection in the backup method of passive optical network optical line terminal OLT equipment comprises that abnormal protection is switched and artificial protection is switched, and the abnormal protection reversed process comprises:
After detecting unusually, OLT equipment sends and switches message under the PON port fully of the affiliated OLT equipment of the main PON port in the described PON backup group in described PON backup group, stops to send notification packet, and closes described main PON port;
OLT equipment is received and is switched message under the PON port fully in the described PON backup group, starts described PON port fully, and the beginning cycle sends notification packet;
The affiliated OLT equipment of PON port that is equipped with in the described PON backup group is not received notification packet in Preset Time, be main PON port with described PON port switching fully.
Artificial protection is switched the difference of switching with above-mentioned abnormal protection and is not to be to switch by the abnormality detection trigger protection, switches that the command triggers protection switches but provide by the user, and concrete reversed process is identical, is not giving unnecessary details.
Artificial protection is switched and can be used for online upgrading:
All main PON ports in the OLT equipment are all switched on another OLT equipment, described OLT equipment is upgraded;
After treating that described OLT device upgrade is finished, all main PON ports in described another OLT equipment are switched to described OLT equipment, described another OLT equipment is upgraded.
The present invention also provides a kind of OLT equipment, is applied to comprise in the EPON of at least two OLT equipment, comprising:
The PON backup group is set up the unit, is used to set up the passive optical network PON backup group, and different PON backup groups comprise different PON ports respectively;
The election unit, setting up the unit with described PON backup group is connected, be used for electing the main PON port of described PON backup group and be equipped with the PON port, and, when main PON port priority is lower than fully the PON port, notice notification packet transmitting element stops to send general notification packet, when being equipped with the PON port priority and being higher than main PON port, if described PON backup group is a contention mode, then being equipped with the PON port switching is main PON port, notice notification packet transmitting element periodically sends general notification packet, if be non-contention mode, then be equipped with the PON port and keep current state.
The port information backup units is connected with described election unit, is used for information back-up with the main PON port of described PON backup group to the described PON port that is equipped with.
Message when being used for local terminal OLT device discovery fault, is switched to the transmission of opposite end OLT equipment in PON port switching unit, stops to send notification packet, and closes corresponding main PON port; And receive that opposite end OLT equipment sends switch message the time, start the corresponding PON port that is equipped with, and the beginning cycle sends notification packet; Or in Preset Time, do not receive the notification packet that opposite end OLT equipment sends, with correspondence to be equipped with the PON port switching be main PON port.
General notification packet Transmit-Receive Unit, be used for regularly sending general notification packet to opposite end OLT equipment, and receive the general notification packet that sends from opposite end OLT equipment, and when not receiving the general notification packet that opposite end OLT equipment sends in the scheduled time, trigger PON port switching unit.
Described port information backup units also comprises:
Backup information transmitting-receiving subelement is used to receive and dispatch backup information;
The active and standby subelement of shaking hands, be used for by OLT equipment under the main PON port of described PON backup group in the PON backup group be equipped with the PON port under OLT equipment send backup request, and receive and describedly be equipped with the backup response back that OLT equipment returns under the PON port and start described port information backup units.
Described port information backup units also comprises:
The syndrome unit, be used for sending backup and finish message by OLT equipment under the PON port fully of OLT equipment under the main PON port of described PON backup group in the PON backup group, and the check value that OLT equipment returns under the PON port fully in the reception PON backup group, described check value and local terminal information calculations value are compared, if it is consistent, then back up successfully,, then resend backup messages if inconsistent.
Described PON port switching unit specifically comprises:
The abnormality detection subelement is used for OLT equipment is carried out fault detect;
Switch the packet sending and receiving subelement, when being used for described abnormality detection subelement and detecting local terminal OLT equipment and break down, send to opposite end OLT equipment and to switch message; And receive the message of switching of opposite end OLT equipment transmission;
Switch function operation subelement when being used for local terminal OLT Equipment Inspection to fault, arrives PON port fully with main PON port switching; During the general notification packet of switching message or not receiving in the scheduled time that opposite end OLT equipment sends of receiving that described opposite end OLT equipment sends, correspondence is equipped with the PON port switching to main PON port.
Subelement is switched in order, is used to receive user's the order of switching, and notifies described switch function operation subelement to carry out the switching operation of active and standby PON port.
In the embodiments of the invention, between OLT equipment, the protection backup is switched in PON trunk path, avoided introducing new fault point, improved the fail safe of system by notification packet and backup message.In addition, during system upgrade, to the alternate device upgrading, carry out masterslave switchover again,, make Working service can not interrupt another device upgrade by earlier.
Description of drawings
Fig. 1 is a FTTH system configuration schematic diagram in the prior art;
Fig. 2 is the backup method flow chart of a kind of OLT equipment among the present invention;
Fig. 3 is a dual-host backup networking schematic diagram among the present invention;
Fig. 4 is a kind of OLT equipment structure chart among the present invention.
Embodiment
Core concept of the present invention is: same POS uplink optical fibers is connected two PON mouths of two OLT equipment, these two PON mouths are set up a PON backup group PBG (PON Backup Group, the PON backup group), one of them port role is Master (master), another be Slave (from).Between OLT equipment, the protection backup is switched in PON trunk path, avoided introducing new fault point, improved the stability of system by notification packet and backup message.
The embodiment of the invention one provides a kind of backup method of device for passive optical network OLT, is applied to comprise in the EPON of at least two OLT equipment, as shown in Figure 2, may further comprise the steps:
Step s201 sets up the passive optical network PON backup group, and different PON backup groups comprise different PON ports respectively.
Step s202 elects the main PON port in the described PON backup group and is equipped with the PON port.Detailed process comprises: send the notification packet of each PON backup group respectively to opposite end OLT equipment, comprise PON backup group information and precedence information in the described notification packet; Receive the notification packet that opposite end OLT equipment sends, the PON port priority information of more described opposite end OLT equipment and the PON port priority information of local terminal OLT equipment, if the PON port priority height of local terminal OLT equipment, local terminal PON port in the then described PON backup group is main PON port, and opposite end PON port is for being equipped with the PON port.Main PON port in the described PON backup group periodically sends notification packet to being equipped with the PON port.
Step s203, with the information back-up of the main PON port in the described PON backup group to the described PON port that is equipped with.In order to guarantee to back up the reliability of flow process, can before the described PON port fully that port information is backuped in the described PON backup group, increase active and standby step of shaking hands: OLT equipment transmission backup request under the PON port fully of OLT equipment in the PON backup group under by the main PON port in the described PON backup group, and receive the described backup response that the affiliated OLT equipment of PON port returns that is equipped with.Port information is sent to being equipped with under the PON port in the described PON backup group and also increase checking procedure after the OLT equipment described: be equipped with PON port under the OLT equipment of OLT equipment in the PON backup group sends backup and finishes message under by the main PON port in the described PON backup group; Receive the backup check message that the affiliated OLT equipment of PON port returns that is equipped with in the PON backup group, carry check value in the described backup verification message; Described check value and local terminal information calculations value are compared,, then back up successfully,, then resend backup messages if inconsistent if consistent.
The backup method of above-mentioned device for passive optical network OLT can be used and switching operation.Wherein switch and comprise that abnormal protection is switched and Manual Switch.
It is when OLT device discovery fault that abnormal protection is switched, switch message by OLT equipment transmission under the PON port fully of OLT equipment under the main PON port in the described PON backup group in described PON backup group, stop to send notification packet, and close described main PON port; OLT equipment is received and is switched message under the PON port fully in the described PON backup group, starts described PON port fully, and the beginning cycle sends notification packet.In addition, if the affiliated OLT equipment of PON port that is equipped with in the described PON backup group is not received notification packet in Preset Time, can be main PON port also with described PON port switching fully, the realization abnormal protection is switched.
Manual Switch can be applied in the online upgrading: all main PON ports in the OLT equipment are all switched on another OLT equipment, described OLT equipment is upgraded; After treating that described OLT device upgrade is finished, all main PON ports in described another OLT equipment are switched to described OLT equipment, described another OLT equipment is upgraded.Certainly, to realizing load balancing by redistributing active and standby PON port after the OLT device upgrade.
The embodiment of the invention two is that example describes with two OLT device backups, Fig. 3 is the networking diagram of dual-host backup scheme of the present invention, comprise two POS, the up pair of optical fiber of POS connects the corresponding PON mouth of OLT1 and OLT2 equipment respectively, OLT1 also needs a link to link to each other with the OLT2 equipment room, be used for communicating by letter of Handshake Protocol message and backup message, this link can be that twisted-pair feeder also can be an optical link, for guaranteeing the reliability of this link, can adopt polymerization or STP redundant links such as (Spanning Tree Protocol, Spanning-Tree Protocols) backup networking plan.Same POS uplink optical fibers is connected two PON mouths of OLT1 and OLT2 equipment, and these two PON mouths are set up a PON backup group PBG (PON BackupGroup, PON backup group), and one of them port role is Master (master), another be Slave (from).A plurality of POS can adopt the load balancing mode, the Master of part PBG is arranged on the equipment, and the Master of other PBG is arranged on another equipment.
Backup method based on the OLT equipment of Fig. 2 can be realized switching unusually, the Manual Switch business is not interrupted, and may further comprise the steps:
Step s401, PON mouth initial configuration.Set up PBG1 and PBG2 on OLT1, with the PON mouth M1 adding PGB1 of OLT1, the S2 of OLT1 adds PGB2; Dispose two PON port prioritys, for example M1 priority is 20, and S2 priority is 10; Set up PBG1 and PBG2 on OLT2, with the PON mouth S1 adding PGB1 of OLT2, the M2 of OLT2 adds PGB2; Dispose two PON mouth priority, for example M2 priority is 20, and S1 priority is 10.
Step s402 carries out active and standby PON mouth election.OLT1 and OLT2 send GA (the General Advertisement of PBG1 and PBG2 separately to the other side, general notification packet), GA be used for Master election and afterwards Master send to Slave by some cycles, notice Master state is normal, and this message comprises the ID of this PBG priority, PGB or the port id of local terminal and opposite end (Slave).After receiving the other side's GA message, extract entrained PBG group information of message and precedence information, with the contrast of local terminal configuration PON mouth precedence information, if local terminal PON mouth priority is low, then no longer send GA, if local terminal PON mouth priority height is then pressed predetermined period and continued to send GA, this cycle can be disposed by the user.For example, OLT1 receives the GA message of the PBG1 that OLT2 sends, finds the priority of the priority 10 of the other side's port S1 less than local port M1, so this group OLT1 is main PON mouth, and in like manner OLT2 is main PON mouth among the PBG2.
Carry out after the active and standby PON mouth election, can also seize two kinds of pattern configurations for PBG group adds to seize with non-, when the PBG group has existed under the situation of main PON mouth, if be configured to contention mode, after receiving GA, the affiliated OLT equipment of PON mouth finds that local terminal priority is higher if be equipped with, then also send GA, OLT equipment is received this GA under the main PON port, send SA (Switchover Advertisement switches notification packet), start masterslave switchover; If be configured to non-contention mode, after receiving GA, the affiliated OLT equipment of PON port finds that local terminal priority is higher even be equipped with, keep current state.
Step s403, main PON message breath backups to the PON mouth.After election was finished, OLT equipment can send to fully OLT equipment under the PON mouth with main PON message breath by BM message under the main PON mouth, be equipped with the PON mouth under OLT equipment be synchronized to PON mouth fully according to these messages.Wherein, BM (Backup Messagement, backup messages) is the message of relevant informations such as the carrying PBG configuration that sent by OLT equipment under the main PON mouth and ONU registration.When PBG disposed for the first time, this backup was to finish in batches, and in the dual systems running, main PON message breath changes then under it OLT equipment to be finished by real-time transmission BM message and back up in realtime.The purpose of backup is after switching, and new main PON mouth can enter operating state at once, and all business needn't be waited for that ONU heavily registers and disposes heavily and issue.In order to increase the reliability of backup flow process, can add active and standby handshake mechanism and verification scheme on stream, such as: before OLT equipment sends BM under the main PON mouth, send a BackupRequest earlier, OLT equipment confirms that a Backup Reply represents that the affiliated OLT equipment of PON mouth has prepared to receive BM fully under being equipped with the PON mouth, OLT equipment sends BM again under the main PON mouth, after all BM send and finish, OLT equipment transmission Backup over represents the originally subsynchronous follow-up BM message that do not have under the main PON mouth, the affiliated OLT equipment transmission of PON mouth Backup check message also carries the check value according to the information calculations after synchronous therein fully, under the main PON mouth OLT equipment receive extract behind the Backup check check value and and comparing according to the local terminal information calculations, if unanimity then send Backupsuccess message and finish that this is subsynchronous, if two check values are inconsistent, OLT equipment is initiated again synchronously under the main PON mouth.
Step s404, protection is switched.
A kind of is that abnormal protection is switched: when this group of OLT device discovery PON mouth under the main PON mouth occurs can sending the SA message by horse back OLT equipment under being equipped with the PON mouth unusually, and the PON mouth that stops to send the GA message and close oneself, switch OLT monitoring of tools under order or the main PON mouth and send to the unusual back horse back of PON mouth of corresponding PBG itself carrying out on the OLT equipment under the main PON mouth, notice is equipped with under the PON mouth OLT equipment and will be equipped with the PON mouth and switches to new main PON mouth; Be equipped with and enable the PON mouth of oneself after the affiliated OLT equipment of PON mouth is received SA, and the beginning cycle sends the GA message at once.When existing main PON mouth complete machine to delay machine, be equipped with under the PON mouth OLT equipment and wait for a period of time and receive that not the GA message should switch automatically, become new main PON mouth with being equipped with the PON mouth, the described stand-by period can be set by the user.
Another kind is the Manual Switch flow process, and after OLT equipment was carried out and switched order under the main PON mouth, OLT equipment sent SA under being equipped with the PON mouth, and the PON mouth that stops to send the GA message and close oneself; Be equipped with and enable the PON mouth of oneself after the affiliated OLT equipment of PON mouth is received SA, and the beginning cycle sends the GA message at once.Order is switched and can be provided particular group to switch and all groups are switched, and it is that all local terminal roles of OLT equipment are that the PBG of main PON mouth implements order and switches flow process that all groups are switched.
In addition, because main purpose of the present invention is that backup protection is carried out in PON trunk path, and is indifferent to the networking mode of ONU side, therefore, can adapt to the PON backup protection scheme of various ONU sides.
Be that example describes just among Fig. 2, in fact may comprise situation, as comprise three POS greater than two POS with two POS.The PON mouth of preceding two POS is identical with Fig. 2, and the PON mouth of the 3rd POS is D on OLT1, is E on OLT1, then sets up PBG1, PBG2 and PBG3 on OLT1, and its PON mouth M1 is added PGB1, and S2 adds PGB2, and D adds PGB3; Set up PBG1, PBG2 and PBG3 on OLT2, its PON mouth S1 is added PGB1, M2 adds PGB2, and E adds PGB3.Other operations are identical with Fig. 2 situation, do not giving unnecessary details.
The embodiment of the invention also provides a kind of OLT equipment, be applied to comprise in the EPON of at least two OLT equipment, as shown in Figure 4, comprise: the PON backup group is set up unit 10, be used to set up the passive optical network PON backup group, different PON backup groups comprise different PON ports respectively.Election unit 20, setting up unit 10 with described PON backup group is connected, be used for electing the main PON port of described PON backup group and be equipped with the PON port, and, when main PON port priority is lower than fully the PON port, notice notification packet transmitting element 50 stops to send general notification packet, when being equipped with the PON port priority and being higher than main PON port, if described PON backup group is a contention mode, then being equipped with the PON port switching is main PON port, notice notification packet transmitting element periodically sends general notification packet, if be non-contention mode, then be equipped with the PON port and keep current state; Port information backup units 30 is connected with described election unit 20, is used for information back-up with the main PON port of described PON backup group to the described PON port that is equipped with.Message when being used for local terminal OLT device discovery fault, is switched to the transmission of opposite end OLT equipment in PON port switching unit 40, stops to send notification packet, and closes corresponding main PON port; And receive that opposite end OLT equipment sends switch message the time, start the corresponding PON port that is equipped with, and the beginning cycle sends notification packet; Or in Preset Time, do not receive the notification packet that opposite end OLT equipment sends, with correspondence to be equipped with the PON port switching be main PON port.General notification packet Transmit-Receive Unit 50, be used for regularly sending general notification packet to opposite end OLT equipment, and receive the general notification packet that sends from opposite end OLT equipment, and when not receiving the general notification packet that opposite end OLT equipment sends in the scheduled time, trigger PON port switching unit 40.
Wherein, also comprise the active and standby subelement 32 of shaking hands in the port information backup units 30, be used for by OLT equipment under the main PON port of described PON backup group in the PON backup group be equipped with the PON port under OLT equipment send backup request, and receive and describedly be equipped with the backup response back that OLT equipment returns under the PON port and start described port information backup units.Syndrome unit 31, be used for sending backup and finish message by OLT equipment under the PON port fully of OLT equipment under the main PON port of described PON backup group in the PON backup group, and the check value that OLT equipment returns under the PON port fully in the reception PON backup group, described check value and local terminal information calculations value are compared, if it is consistent, then back up successfully,, then resend backup messages if inconsistent.Backup information transmitting-receiving subelement 33 is used to receive and dispatch backup information.
Wherein, PON port switching unit 40 specifically comprises: abnormality detection subelement 41 is used for OLT equipment is carried out fault detect; Switch packet sending and receiving subelement 42, when being used for described abnormality detection subelement and detecting local terminal OLT equipment and break down, send to opposite end OLT equipment and to switch message; And receive the message of switching of opposite end OLT equipment transmission; Switch function operation subelement 43 when being used for local terminal OLT Equipment Inspection to fault, arrives PON port fully with main PON port switching; During the general notification packet of switching message or not receiving in the scheduled time that opposite end OLT equipment sends of receiving that described opposite end OLT equipment sends, correspondence is equipped with the PON port switching to main PON port.Subelement 44 is switched in order, is used to receive user's the order of switching, and notifies described switch function operation subelement to carry out the switching operation of active and standby PON port.
Through the above description of the embodiments, those skilled in the art can be well understood to the present invention and can realize by the mode that software adds essential general hardware platform, can certainly pass through hardware, but the former is better execution mode under a lot of situation.Based on such understanding, the part that technical scheme of the present invention contributes to prior art in essence in other words can embody with the form of software product, this computer software product is stored in the storage medium, comprise that some instructions are with so that a computer equipment (can be a personal computer, server, the perhaps network equipment etc.) carry out the described method of each embodiment of the present invention.
More than disclosed only be several specific embodiment of the present invention, still, the present invention is not limited thereto, any those skilled in the art can think variation all should fall into protection scope of the present invention.
Claims (15)
1. the backup method of a passive optical network optical line terminal OLT equipment is applied to comprise in the EPON of at least two OLT equipment, it is characterized in that, said method comprising the steps of:
Set up the passive optical network PON backup group, different PON backup groups comprise different PON ports respectively;
Elect the main PON port in the described PON backup group and be equipped with the PON port;
The information back-up of the main PON port in the described PON backup group is arrived the described PON port that is equipped with.
2. the backup method of device for passive optical network OLT according to claim 1 is characterized in that, the main PON port in the described PON backup group of described election and be equipped with the PON port by the mutual notification packet realization of local terminal OLT equipment and opposite end OLT equipment.
3. as the backup method of device for passive optical network OLT as described in the claim 2, it is characterized in that, described elect the main PON port in the described PON backup group and be equipped with the PON port by local terminal OLT equipment and the opposite end mutual notification packet of OLT equipment specifically comprise:
Local terminal OLT equipment sends the notification packet of each PON backup group respectively to opposite end OLT equipment, comprises PON backup group information and precedence information in the described notification packet;
Local terminal OLT equipment receives the notification packet that opposite end OLT equipment sends, the PON port priority information of more described opposite end OLT equipment and the PON port priority information of local terminal OLT equipment, if the PON port priority height of local terminal OLT equipment, local terminal PON port in the then described PON backup group is main PON port, and opposite end PON port is for being equipped with the PON port.
4. as the backup method of device for passive optical network OLT as described in the claim 3, it is characterized in that described local terminal OLT equipment also comprises after receiving the notification packet that opposite end OLT equipment sends:
When being equipped with the PON port priority and being higher than main PON port, judge the attribute of described PON backup group, if contention mode, then being equipped with the PON port switching is main PON port; If be non-contention mode, then be equipped with the PON port and keep current state.
5. the backup method of device for passive optical network OLT according to claim 1 is characterized in that, described information back-up with the main PON port in the described PON backup group also comprises before being equipped with the PON port to described:
Send backup request by OLT equipment under the PON port fully of OLT equipment under the main PON port in the described PON backup group in the PON backup group, and receive the described backup response that the affiliated OLT equipment of PON port returns that is equipped with.
6. as the backup method of device for passive optical network OLT as described in claim 4 or 5, it is characterized in that described information back-up with the main PON port in the described PON backup group also comprises after being equipped with the PON port to described:
Send backup by OLT equipment under the PON port fully of OLT equipment under the main PON port in the described PON backup group in the PON backup group and finish message;
Receive the backup check message that the affiliated OLT equipment of PON port returns that is equipped with in the PON backup group, carry check value in the described backup verification message;
Described check value and local terminal information calculations value are compared,, then back up successfully,, then resend backup messages if inconsistent if consistent.
7. as the backup method of device for passive optical network OLT as described in the claim 3, it is characterized in that, the main PON port in the described election PON backup group and be equipped with the PON port after also comprise:
OLT equipment periodic OLT equipment under being equipped with the PON port sends notification packet under the main PON port in the described PON backup group.
8. the backup method of device for passive optical network OLT according to claim 1 is characterized in that, described information back-up with the main PON port in the PON backup group also comprises to the described PON port that is equipped with:
OLT equipment sends and switches message under the PON port fully of the affiliated OLT equipment of main PON port in the described PON backup group in described PON backup group, stops to send notification packet, and closes described main PON port;
OLT equipment is received and is switched message under the PON port fully in the described PON backup group, starts described PON port fully, and the beginning cycle sends notification packet;
The affiliated OLT equipment of PON port that is equipped with in the described PON backup group is not received notification packet in Preset Time, be main PON port with described PON port switching fully.
9. an OLT equipment is applied to comprise in the EPON of at least two OLT equipment, it is characterized in that, comprising:
The PON backup group is set up the unit, is used to set up the passive optical network PON backup group, and different PON backup groups comprise different PON ports respectively;
The election unit is set up the unit with described PON backup group and is connected, and is used for electing the main PON port of described PON backup group and is equipped with the PON port;
The port information backup units is connected with described election unit, is used for information back-up with the main PON port of described PON backup group to the described PON port that is equipped with.
10. as OLT equipment as described in the claim 9, it is characterized in that, also comprise:
General notification packet Transmit-Receive Unit is used for regularly sending general notification packet to opposite end OLT equipment, and receives the general notification packet that sends from opposite end OLT equipment.
11., it is characterized in that described port information backup units comprises as OLT equipment as described in the claim 9:
Backup information transmitting-receiving subelement is used to receive and dispatch backup information;
The active and standby subelement of shaking hands, be used for by OLT equipment under the main PON port of described PON backup group in the PON backup group be equipped with the PON port under OLT equipment send backup request, and receive and describedly be equipped with the backup response back that OLT equipment returns under the PON port and start described port information backup units.
12., it is characterized in that described port information backup units also comprises as OLT equipment as described in the claim 9:
The syndrome unit, be used for sending backup and finish message by OLT equipment under the PON port fully of OLT equipment under the main PON port of described PON backup group in the PON backup group, and the check value that OLT equipment returns under the PON port fully in the reception PON backup group, described check value and local terminal information calculations value are compared, if it is consistent, then back up successfully,, then resend backup messages if inconsistent.
13. as OLT equipment as described in the claim 9, it is characterized in that, also comprise:
Message when being used for local terminal OLT device discovery fault, is switched to the transmission of opposite end OLT equipment in PON port switching unit, stops to send notification packet, and closes corresponding main PON port; And receive that opposite end OLT equipment sends switch message the time, start the corresponding PON port that is equipped with, and the beginning cycle sends notification packet; Or in Preset Time, do not receive the notification packet that opposite end OLT equipment sends, with correspondence to be equipped with the PON port switching be main PON port.
14., it is characterized in that described PON port switching unit specifically comprises as OLT equipment as described in the claim 13:
The abnormality detection subelement is used for OLT equipment is carried out fault detect;
Switch the packet sending and receiving subelement, when being used for described abnormality detection subelement and detecting local terminal OLT equipment and break down, send to opposite end OLT equipment and to switch message; And receive the message of switching of opposite end OLT equipment transmission;
Switch function operation subelement when being used for local terminal OLT Equipment Inspection to fault, arrives PON port fully with main PON port switching; During the general notification packet of switching message or not receiving in the scheduled time that opposite end OLT equipment sends of receiving that described opposite end OLT equipment sends, correspondence is equipped with the PON port switching to main PON port.
15., it is characterized in that described PON port switching unit also comprises as OLT equipment as described in the claim 14:
Subelement is switched in order, is used to receive user's the order of switching, and notifies described switch function operation subelement to carry out the switching operation of active and standby PON port.
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| CN200710166383XA CN101150367B (en) | 2007-11-08 | 2007-11-08 | A backup method and device for passive optical network OLT device |
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| CN200710166383XA CN101150367B (en) | 2007-11-08 | 2007-11-08 | A backup method and device for passive optical network OLT device |
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