CN101600128A - The method of a kind of ONU and realization all-fiber protection switching thereof - Google Patents
The method of a kind of ONU and realization all-fiber protection switching thereof Download PDFInfo
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- CN101600128A CN101600128A CNA2009101085400A CN200910108540A CN101600128A CN 101600128 A CN101600128 A CN 101600128A CN A2009101085400 A CNA2009101085400 A CN A2009101085400A CN 200910108540 A CN200910108540 A CN 200910108540A CN 101600128 A CN101600128 A CN 101600128A
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Abstract
The present invention relates to the method for a kind of ONU and realization all-fiber protection switching thereof, described ONU comprises master control borad and at least two blocks of GPUA plates; Described method is: when the working hole that the active side GPUA plate of ONU is judged ONU need be switched; send the master control borad of working hole transforming message to ONU; after described master control borad receives the working hole transforming message; close and active side GPUA plate between inline mouthful; inline mouth between unlatching and the protection side GPUA plate; afterwards local K1K2 field is sent to simultaneously active side GPUA plate and protection side GPUA plate; described active side GPUA plate upgrades local K1K2 field, and the K1K2 field after will upgrading feeds back to OLT.The invention enables producer to provide ONU according to the requirement of user to level of security with single or multiple GPUA plates.
Description
Technical field
The present invention relates to GPON (Gigabit-capable Passive Optical Network; gigabit passive optical network) communications field; method in particular to a kind of ONU (OpticalNetwork Unit, optical network unit) and realization all-fiber protection switching thereof.
Background technology
Along with the development of broadband access technology, operator accepts and disposes OAN (Optical Access Network, Optical Access Network network) just gradually, in order to more rapid rate and higher-quality service to be provided to the user.
PON (Passive Optical Network, EPON) technology is a kind of optical fiber access technology of point-to-multipoint, by OLT (Optical Line Terminal, optical line terminal), ONU and ODN (Optical Distribution Network, Optical Distribution Network) forms, as shown in Figure 1, be an OLT connects a plurality of ONU by ODN schematic diagram.
In PON used, the user of some type needed higher fail safe, wishes that operator can provide a kind of security mechanism to guarantee that its service channel does not interrupt, and perhaps the requirement of time one-level is, can have no progeny in service channel and recover fast.This has just proposed protection and quick requirement of switching to the PON of carrying customer service operation.
In order to improve network reliability and survivability, can in the GPON system, adopt optical fibre protection inverting mechanism.The optical fibre protection inverting of GPON system can adopt following dual mode:
Auto switching: trigger by fault detect, as dropout, LOF or Signal Degrade (being that signal BER (Bit Error Rate, the error rate) degrades to the predefine thresholding) etc.;
Forced Switch: trigger by Admin Events, as optical fiber heavy-route, replacing optical fiber etc.
After generation was switched in protection, the GPON system should support returning automatically of protected business or manually return function.
The optical fibre protection inverting configuration mainly contains two kinds, is respectively: trunk optical fibre protection inverting and all-fiber protection switching, as shown in Figure 2, the structural representation when the GPON system adopts all-fiber protection switching.
G.983.5, all-fiber protection switching supportive protection handoff protocol, standard are mentioned OLT and ONU and can be finished protection by PLOAM (physical layer operations, administer and maintain) exchange PST (PONSection Trace, the PON section is detected) message cooperation and switch.
Under the all-fiber protection switching configuration, the redundant receiving circuit of OLT and ONU side can be in the Hot Spare state, switches back ONU and need not to find range again, therefore can realize seamless switching (no LOF).Under this configuration mode, no matter be reversed process or return course, uplink and downlink optical channel switching time all should be less than 50ms.
The equipment configratioin requirement of all-fiber protection switching is that OLT and ONU possess a plurality of PON mouths; switch with support; this has just brought some problems; in case the main PON mouth of using of ONU; perhaps main PON mouth with side breaks down; user's Network Communicate Security can not be guaranteed, and much have only the ONU of single PON mouth can't realize this protected mode.
Summary of the invention
Technical problem to be solved by this invention is, a kind of ONU is provided and realizes the method for all-fiber protection switching, and the present invention has improved the safety guarantee of ONU level.
The invention discloses a kind of ONU, comprise master control borad, also comprise at least two GPUA (GPON Process Unit A, GPON processing unit) plates (the GPON veneer that promptly has a PON mouth), wherein,
When described GPUA plate is used in working order, judge whether the working hole of ONU needs to switch, if then send the working hole transforming message to described master control borad; And the local K1K2 field of the information updating that returns according to described master control borad, and the local K1K2 field after will upgrading feeds back to OLT;
Described master control borad is used for after receiving the working hole transforming message, close and active side GPUA plate between inline mouthful, open with protection side GPUA plate between inline mouth, and local K1K2 field sent to all GPUA plates simultaneously.
Described GPUA plate comprises message distribution module, PLOAM processing module, protection module and communication between plates module, and is wherein, described
The PST forwards that the message distribution module is used for receiving is given described PLOAM processing module;
The PLOAM processing module is used to judge whether the K1K2 field of the PST message that receives is changed, if then described PST message is handed down to described protection module;
Protection module is used to resolve the PST message that receives, and judges according to analysis result whether needs are switched for the working hole of ONU;
The communication between plates module is used for forwards master control borad or the protection module that will receive.
Described GPUA plate also comprises alarm module, is used for producing alarm information and also sending to described protection module when the dropout of ONU and/or deterioration;
Described protection module is used to resolve the alarm information that receives, and judges according to analysis result whether needs are switched for the working hole of ONU.
Whether described GPUA plate also is used to detect the signal of ONU and loses and/or deterioration, be used for when the K1K2 field change of the PST message that receives, upgrade the long-range K1K2 field of self, and the long-range K1K2 field after will upgrading sends to described master control borad by described communication between plates module with form of message; And be used for when guard mode, according to the message that described master control borad sends, upgrade the long-range K1K2 field of self;
The forwards that carries the K1K2 field that described master control borad is used for receiving is given the GPUA plate that is in guard mode.
Described GPUA plate also is used for when being activated earlier, and reception is also preserved the configuration information that OLT issues, and simultaneously described configuration information is transmitted to described master control borad; And be used for when being activated, preserving the configuration information that described master control borad sends by the back;
Described master control borad also is used for the configuration information that GPUA plate that buffer memory activates earlier sends, and the GPUA plate that activates in the back is when being activated, and the configuration information of buffer memory is transmitted to the GPUA plate that described back is activated.
The present invention further discloses the method that a kind of ONU realizes all-fiber protection switching on the basis of above-mentioned ONU; when the working hole that the active side GPUA plate of ONU is judged ONU need be switched; send the master control borad of working hole transforming message to ONU; after described master control borad receives the working hole transforming message; close and active side GPUA plate between inline mouthful; inline mouth between unlatching and the protection side GPUA plate; afterwards local K1K2 field is sent to simultaneously active side GPUA plate and protection side GPUA plate; described active side GPUA plate upgrades local K1K2 field, and the K1K2 field after will upgrading feeds back to OLT.
Described active side GPUA plate judges by the PST message that receives whether the working hole of ONU needs to switch, and concrete grammar is as follows:
Described active side GPUA plate is resolved the PST message that receives, and relatively resolves the Request Priority of the described PST message that obtains and the Request Priority of local request; If the former is less than the latter, then the working hole of described ONU does not need to switch; If the former equals the latter, judge then whether the channel number of the request channel of resolving the described PST message that obtains is lower than the channel number of the request channel of described local request, if then the working hole of described ONU need be switched; Otherwise the working hole of described ONU does not need to switch; If the former is greater than the latter, then the working hole of described ONU need be switched.
Described active side GPUA plate is also carried out following operation before resolving PST message:
Upgrade self long-range K1K2 field, and upgrade the long-range K1K2 field of protection side GPUA plate by master control borad.
Whether described active side GPUA plate has dropout and/or deterioration to judge whether the working hole of described ONU needs to switch, and concrete grammar is as follows by detecting:
Step a: described active side GPUA plate detects dropout and/or the deterioration of ONU, produces alarm information;
Step b: resolve described alarm information, and relatively resolve the Request Priority of the described alarm information that obtains and the Request Priority of a preceding remote request, if the former is less than the latter, then the working hole of described ONU does not need to switch; Equal the latter as if the former, then execution in step c; If the former is greater than the latter, then execution in step d;
Step c: whether the channel number of judge resolving the request channel of the described alarm information that obtains is lower than the channel number of the request channel of described remote request, if, execution in step d then; Otherwise the working hole of described ONU does not need to switch;
Steps d: the Request Priority of the Request Priority of more described alarm information and local request, if the former is less than the latter, then the working hole of described ONU does not need to switch; Equal the latter as if the former, then execution in step e; If the former is greater than the latter, then the working hole of described ONU need be switched;
Step e: judge whether the channel number of the request channel of described alarm information is lower than the channel number of the request channel of described local request, if then the working hole of described ONU need be switched; Otherwise the working hole of described ONU does not need to switch.
When described ONU starts, the GPUA plate that activates is preserved the configuration information that OLT issues earlier, and described configuration information is transmitted to master control borad, the message that the master control borad buffer memory receives, when the GPUA plate that activates after treating is activated, reads the configuration information of buffer memory successively and be transmitted to the GPUA plate that described back is activated.
The present invention is according to the GPON business model, with ANI (access node interface, the access node interface) function of side realizes by GPUA plate independently, makes producer to provide single or multiple GPUA plates to satisfy user's requirement according to the requirement of user to level of security.
Description of drawings
Fig. 1 is that PON forms schematic diagram;
Structural representation when Fig. 2 is GPON employing all-fiber protection switching;
Fig. 3 is the structural representation of ONU of the present invention;
Fig. 4 is the flow chart of the method for the invention embodiment one;
Fig. 5 is the flow chart of the method for the invention embodiment two;
Fig. 6 is the schematic diagram of the present invention before switching;
Fig. 7 is the schematic diagram of the present invention after switching.
Embodiment
Below in conjunction with accompanying drawing and preferred embodiment, the present invention done being described in further detail.
Prior art is with (the User Network Interface of the UNI in the GPON business model, User Network Interface) side and ANI (Access Node Interface, the access node interface) side is being integrated on the ONU, and hardware configuration (a PON mouth) is in a single day fixing will not to be apt to do modification.
The present invention is according to the GPON business model, independently realize the function of ANI side (the GPON veneer that promptly has a PON mouth) by the GPUA plate, the functions such as master control borad that the GPUA plate can independently be responsible for carrying out alternately with OLT, be distributed under the realization of upper strata ANI side business, the processing of MIB storehouse and the configuration with the UNI side, ONU of the present invention can be according to the requirement of user to level of security, in the plug and play mode, provide single or multiple GPUA plates.
As shown in Figure 3; it is the structural representation of ONU of the present invention; in the present embodiment, described ONU comprises master control borad, GPUA plate 1, GPUA plate 2; two boards can be operated in operating state or guard mode as required; the PON mouth of in running order GPUA plate links to each other with the active side of OLT, and the PON mouth that is in the GPUA of guard mode links to each other with the protection side of OLT, and each GPUA is deal with data independently; and the scheduling by master control borad, know own present located state.Wherein
When the GPUA plate is used in working order, judge whether the working hole of ONU needs to switch, if then send the working hole transforming message to master control borad; And the local K1K2 field of the information updating that returns according to master control borad, and the local K1K2 field after will upgrading feeds back to OLT; Whether the signal that is used to detect ONU is lost and/or deterioration, be used for when the K1K2 field change of the PST message that receives, upgrade the long-range K1K2 field of self, and the long-range K1K2 field after will upgrading sends to master control borad by described communication between plates module with form of message; And be used for when guard mode, according to the message that master control borad sends, upgrade the long-range K1K2 field of self; Be used for when being activated earlier, receive and preserve the configuration information (configuration information is the management information bank (MIB) of preserving with OMCI (light regime control interface) form) that OLT issues, simultaneously described configuration information is transmitted to described master control borad; And be used for when being activated, preserving the configuration information that master control borad sends by the back; The GPUA plate comprises message distribution module, PLOAM processing module, protection module, communication between plates module, alarm module,
The PST forwards that the message distribution module is used for receiving is given described PLOAM processing module;
The PLOAM processing module is used to judge whether the K1K2 field of the PST message that receives is changed, if then described PST message is handed down to described protection module;
Protection module is used to resolve PST message and the alarm information that receives, and judges according to analysis result whether needs are switched for the working hole of ONU;
The communication between plates module is used for forwards master control borad or the protection module that will receive;
Alarm module is used for when the dropout of ONU and/or deterioration, produces alarm information and sends to described protection module.
Master control borad is used for after receiving the working hole transforming message, close and active side GPUA plate between inline mouthful, open with protection side GPUA plate between inline mouth, and local K1K2 field sent to all GPUA plates simultaneously; The forwards that carries the K1K2 field that is used for receiving is given the GPUA plate that is in guard mode; Also be used for the configuration information that GPUA plate that buffer memory activates earlier sends, and the GPUA plate that activates in the back is when being activated, the configuration information of buffer memory is transmitted to the GPUA plate that described back is activated.
As shown in Figure 4, be the flow chart of the method for the invention embodiment one, present embodiment adopts the Forced Switch mode, and hypothesis GPUA plate 1 is in running order, and GPUA plate 2 is in guard mode; Comprise the steps:
The PST forwards that the message distribution module of step 401:GPUA plate 1 sends the OLT that receives is to the PLOAM processing module;
If K1K2 field that the more described message of step 402:PLOAM processing module is carried and local long-range K1K2 field of preserving are unanimity, then process ends; Otherwise, give protection module, execution in step 403 with described PST forwards;
Step 403: protection module is resolved the PST message that receives, and obtains the Request Priority and the request channel of described PST message;
Step 404: relatively resolve the Request Priority and local Request Priority of asking that obtain; If the Request Priority of described PST message is less than the Request Priority of described local request, then process ends; If the Request Priority of described PST message equals the Request Priority of described local request, then execution in step 405; If the Request Priority of described PST message is greater than the Request Priority of described local request, then execution in step 406;
Step 405: judge whether the channel number of resolving the request channel that obtains is lower than the channel number of the request channel of local request; If then execution in step 406; Otherwise, process ends;
Step 406: send the working hole transforming message to master control borad by the communication between plates module;
Step 407: after master control borad receives the working hole transforming message, close and GPUA plate 1 between inline mouthful, open with GPUA plate 2 between inline mouth, afterwards local K1K2 field is sent to GPUA plate 1 and GPUA plate 2 simultaneously;
At this moment, GPUA plate 2 becomes the work side plate, and GPUA plate 1 becomes the protection side plate, and OLT will be handled by GPUA plate 2 in the PST message that the next one sends constantly.Before switching and after switching, be actually Hot Spare, promptly be in online state because be in the GPUA plate of guard mode, as Business Stream by the time, remain can normal process.Under normal operation; synchronization has and the Business Stream that only is in the GPUA plate of active side is unimpeded, and the Business Stream that is in the GPUA plate of protection side gets clogged, as shown in Figure 6 and Figure 7; represented before and after switching the situation that Business Stream gets clogged respectively.
Step 408:GPUA plate 1 upgrades local K1K2 field, and the K1K2 field after will upgrading feeds back to OLT.
Under dropout (SF), Signal Degrade situations such as (SD); if wait for the PST message that OLT issues in above-mentioned passive mode; and then judge; so can be former thereby delay time of conversion because of the processing of OLT and signal transmission etc.; thereby can't embody the superiority of all-fiber protection switching, this just needs ONU initiatively to change.As shown in Figure 5, be the flow chart of the method for the invention embodiment two, present embodiment adopts initiatively switchover mode, suppose that equally GPUA plate 1 is in running order, and GPUA plate 2 is in guard mode; Comprise the steps:
Step 501:GPUA plate 1 detects dropout and/or the deterioration of ONU, and the alarm module of GPUA plate 1 produces alarm information and sends protection module;
Step 502: protection module is resolved the alarm information of receiving, obtains the Request Priority and the request channel of alarm information;
Step 503: protection module compares the Request Priority of alarm information and the Request Priority of a preceding remote request, if the Request Priority of alarm information is less than the priority of remote request, then process ends; If the Request Priority of alarm information equals the priority of remote request, then execution in step 504: the Request Priority of alarm information is greater than the priority of remote request, and then execution in step 505;
Step 504: protection module judges whether the channel number of the request channel of alarm information is lower than the channel number of the request channel of remote request, if then execution in step 505; Otherwise, process ends;
Step 505: protection module is the Request Priority and the local Request Priority of asking of alarm information relatively, if the Request Priority of alarm information is less than the Request Priority of this locality request, then process ends; If the Request Priority of alarm information equals the Request Priority of local request, then execution in step 506; If the Request Priority of alarm information is greater than the Request Priority of this locality request, then execution in step 507;
Step 506: protection module judges whether the channel number of the request channel of alarm information is lower than the channel number of the request channel of local request, if then execution in step 507; Otherwise, process ends;
Step 507: protection module sends the working hole transforming message to master control borad by the communication between plates module;
Step 508: after master control borad receives the working hole transforming message, close and GPUA plate 1 between inline mouthful, open with GPUA plate 2 between inline mouth, afterwards local K1K2 field is sent to GPUA plate 1 and GPUA plate 2 simultaneously;
At this moment, GPUA plate 2 becomes the work side plate, and GPUA plate 1 becomes the protection side plate.
Step 509:GPUA plate 1 upgrades local K1K2 field, and the K1K2 field after will upgrading feeds back to OLT.
Among the present invention, because every block of GPUA plate all is the individuality that can work alone, all has independently MIB, in order to guarantee the consistency of both sides configuration, in addition, define according to standard, when OLT and ONU were synchronous, configuration only can issue from a PON mouth, then can be consistent for the MIB that guarantees both sides GPUA plate, when the present invention starts at ONU, just realize the unanimity of the MIB of both sides GPUA plate.Because when ONU starts; on the time point that two blocks of GPUA plates are activated certain difference is arranged; and be unable to estimate; it (may be active side that the channel at a side place that is activated earlier can be considered to working channel; it also may be the protection side; this may be subjected to the influence of environment and determine; be uncontrollable); the configuration meeting is issued by this side; if the configuration information that the GPUA plate that elder generation activates issues the OLT that receives directly is forwarded on another piece GPUA plate; then may also not finish startup or activation because of another piece GPUA plate, cause configuration not received or to handle by an other GPUA plate fully, solution of the present invention is:
When ONU starts, the GPUA plate that activates is transmitted to master control borad with the configuration information that the OLT that receives issues earlier, master control borad is received the back buffer memory, after treating that other GPUA plate is activated, take out storing message successively and be transmitted to the GPUA plate that the back is activated, so just avoided because the losing of two GPUA plate configurations that the interval causes more greatly start-up time.
Below only be the preferred embodiments of the present invention; for a person skilled in the art, the present invention can have various changes or variation, and is within the spirit and principles in the present invention all; any modification of being done, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (10)
1, a kind of optical network unit ONU comprises master control borad, it is characterized in that, also comprises at least two blocks of gigabit passive optical network processing unit GPUA plates, wherein,
When described GPUA plate is used in working order, judge whether the working hole of ONU needs to switch, if then send the working hole transforming message to described master control borad; And the local K1K2 field of the information updating that returns according to described master control borad, and the local K1K2 field after will upgrading feeds back to optical line terminal OLT;
Described master control borad is used for after receiving the working hole transforming message, close and active side GPUA plate between inline mouthful, open with protection side GPUA plate between inline mouth, and local K1K2 field sent to all GPUA plates simultaneously.
2, ONU as claimed in claim 1 is characterized in that, described GPUA plate comprises message distribution module, physical layer operations, administers and maintains the PLOAM processing module, protection module and communication between plates module, and is wherein, described
The PST forwards that the message distribution module is used for receiving is given described PLOAM processing module;
The PLOAM processing module is used to judge whether the K1K2 field of the PST message that receives is changed, if then described PST message is handed down to described protection module;
Protection module is used to resolve the PST message that receives, and judges according to analysis result whether needs are switched for the working hole of ONU;
The communication between plates module is used for forwards master control borad or the protection module that will receive.
3, ONU as claimed in claim 2 is characterized in that, described GPUA plate also comprises alarm module, is used for producing alarm information and also sending to described protection module when the dropout of ONU and/or deterioration;
Described protection module is used to resolve the alarm information that receives, and judges according to analysis result whether needs are switched for the working hole of ONU.
4, ONU as claimed in claim 2 is characterized in that,
Whether described GPUA plate also is used to detect the signal of ONU and loses and/or deterioration, be used for when the K1K2 field change of the PST message that receives, upgrade the long-range K1K2 field of self, and the long-range K1K2 field after will upgrading sends to described master control borad by described communication between plates module with form of message; And be used for when guard mode, according to the message that described master control borad sends, upgrade the long-range K1K2 field of self;
The forwards that carries the K1K2 field that described master control borad is used for receiving is given the GPUA plate that is in guard mode.
5, ONU as claimed in claim 1 is characterized in that,
Described GPUA plate also is used for when being activated earlier, and reception is also preserved the configuration information that OLT issues, and simultaneously described configuration information is transmitted to described master control borad; And be used for when being activated, preserving the configuration information that described master control borad sends by the back;
Described master control borad also is used for the configuration information that GPUA plate that buffer memory activates earlier sends, and the GPUA plate that activates in the back is when being activated, and the configuration information of buffer memory is transmitted to the GPUA plate that described back is activated.
6, a kind of ONU realizes the method for all-fiber protection switching; it is characterized in that; when the working hole that the active side GPUA plate of ONU is judged ONU need be switched; send the master control borad of working hole transforming message to ONU; after described master control borad receives the working hole transforming message; close and active side GPUA plate between inline mouthful; inline mouth between unlatching and the protection side GPUA plate; afterwards local K1K2 field is sent to simultaneously active side GPUA plate and protection side GPUA plate; described active side GPUA plate upgrades local K1K2 field, and the K1K2 field after will upgrading feeds back to OLT.
7, ONU as claimed in claim 6 realizes the method for all-fiber protection switching, it is characterized in that described active side GPUA plate judges by the PST message that receives whether the working hole of ONU needs to switch, and concrete grammar is as follows:
Described active side GPUA plate is resolved the PST message that receives, and relatively resolves the Request Priority of the described PST message that obtains and the Request Priority of local request; If the former is less than the latter, then the working hole of described ONU does not need to switch; If the former equals the latter, judge then whether the channel number of the request channel of resolving the described PST message that obtains is lower than the channel number of the request channel of described local request, if then the working hole of described ONU need be switched; Otherwise the working hole of described ONU does not need to switch; If the former is greater than the latter, then the working hole of described ONU need be switched.
8, ONU as claimed in claim 7 realizes the method for all-fiber protection switching, it is characterized in that, described active side GPUA plate is also carried out following operation before resolving PST message:
Upgrade self long-range K1K2 field, and upgrade the long-range K1K2 field of protection side GPUA plate by master control borad.
9, ONU as claimed in claim 6 realizes the method for all-fiber protection switching, it is characterized in that, whether described active side GPUA plate has dropout and/or deterioration to judge whether the working hole of described ONU needs to switch, and concrete grammar is as follows by detecting:
Step a: described active side GPUA plate detects dropout and/or the deterioration of ONU, produces alarm information;
Step b: resolve described alarm information, and relatively resolve the Request Priority of the described alarm information that obtains and the Request Priority of a preceding remote request, if the former is less than the latter, then the working hole of described ONU does not need to switch; Equal the latter as if the former, then execution in step c; If the former is greater than the latter, then execution in step d;
Step c: whether the channel number of judge resolving the request channel of the described alarm information that obtains is lower than the channel number of the request channel of described remote request, if, execution in step d then; Otherwise the working hole of described ONU does not need to switch;
Steps d: the Request Priority of the Request Priority of more described alarm information and local request, if the former is less than the latter, then the working hole of described ONU does not need to switch; Equal the latter as if the former, then execution in step e; If the former is greater than the latter, then the working hole of described ONU need be switched;
Step e: judge whether the channel number of the request channel of described alarm information is lower than the channel number of the request channel of described local request, if then the working hole of described ONU need be switched; Otherwise the working hole of described ONU does not need to switch.
10, ONU as claimed in claim 6 realizes the method for all-fiber protection switching; it is characterized in that; when described ONU starts; the GPUA plate that activates is preserved the configuration information that OLT issues earlier; and described configuration information is transmitted to master control borad; the message that the master control borad buffer memory receives when the GPUA plate that activates after treating is activated, reads the configuration information of buffer memory successively and is transmitted to the GPUA plate that described back is activated.
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| CN101895797A (en) * | 2010-07-27 | 2010-11-24 | 中兴通讯股份有限公司 | Method and device for realizing all-fiber protection |
| CN102149027A (en) * | 2010-02-05 | 2011-08-10 | 中兴通讯股份有限公司 | Passage switching method and system and downlink data transmitting method |
| CN102801467A (en) * | 2012-08-20 | 2012-11-28 | 深圳市共进电子股份有限公司 | Device and method for implementing dual optical fiber protection switching based on ONU |
| WO2014059626A1 (en) * | 2012-10-17 | 2014-04-24 | 华为技术有限公司 | Protection switching method, system and apparatus for passive optical network |
| CN107645354A (en) * | 2012-04-19 | 2018-01-30 | 中兴通讯股份有限公司 | Passage method of adjustment and device |
| CN108631861A (en) * | 2018-03-21 | 2018-10-09 | 烽火通信科技股份有限公司 | Realize the GPON systems and pretection switch method of quick protective switch |
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| CN2824439Y (en) * | 2005-11-04 | 2006-10-04 | 华为技术有限公司 | Optical line terminal |
| CN101247666B (en) * | 2008-03-24 | 2011-04-20 | 中兴通讯股份有限公司 | Protecting equipment and method based on optical network system |
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| CN102149027A (en) * | 2010-02-05 | 2011-08-10 | 中兴通讯股份有限公司 | Passage switching method and system and downlink data transmitting method |
| WO2011094990A1 (en) * | 2010-02-05 | 2011-08-11 | 中兴通讯股份有限公司 | Method and system for path switching and method for transmitting downlink data |
| CN102149027B (en) * | 2010-02-05 | 2016-08-03 | 中兴通讯股份有限公司 | Path switching method, system and downlink data transmission method |
| CN101895797A (en) * | 2010-07-27 | 2010-11-24 | 中兴通讯股份有限公司 | Method and device for realizing all-fiber protection |
| CN101895797B (en) * | 2010-07-27 | 2014-12-24 | 中兴通讯股份有限公司 | Method and device for realizing all-fiber protection |
| CN107645354A (en) * | 2012-04-19 | 2018-01-30 | 中兴通讯股份有限公司 | Passage method of adjustment and device |
| CN102801467A (en) * | 2012-08-20 | 2012-11-28 | 深圳市共进电子股份有限公司 | Device and method for implementing dual optical fiber protection switching based on ONU |
| WO2014059626A1 (en) * | 2012-10-17 | 2014-04-24 | 华为技术有限公司 | Protection switching method, system and apparatus for passive optical network |
| CN103891177A (en) * | 2012-10-17 | 2014-06-25 | 华为技术有限公司 | Protection switching method, system and apparatus for passive optical network |
| CN103891177B (en) * | 2012-10-17 | 2016-10-12 | 华为技术有限公司 | The pretection switch method, system and device of EPON |
| US9998211B2 (en) | 2012-10-17 | 2018-06-12 | Huawei Technologies Co., Ltd. | Protection switching method, system, and apparatus for passive optical network |
| CN108631861A (en) * | 2018-03-21 | 2018-10-09 | 烽火通信科技股份有限公司 | Realize the GPON systems and pretection switch method of quick protective switch |
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|---|---|
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