CN1925371A - Trunk optical fibre protection inverting device and method for EPON system - Google Patents
Trunk optical fibre protection inverting device and method for EPON system Download PDFInfo
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- CN1925371A CN1925371A CNA2006101398308A CN200610139830A CN1925371A CN 1925371 A CN1925371 A CN 1925371A CN A2006101398308 A CNA2006101398308 A CN A2006101398308A CN 200610139830 A CN200610139830 A CN 200610139830A CN 1925371 A CN1925371 A CN 1925371A
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Abstract
This invention relates to main fiber protection inversion device in EPON system, which comprises the following parts: exchanger connected with upper device in EPON system fiber path to transfer communication data; controller connected to light path. The invention relates to one protection inversion method applied in above device, which comprises the following steps: initial setting said main path prepare relationship; testing whether the main path terminal is broken and if yes then reverting main prepare relationship for effective protection.
Description
Technical field
The present invention relates to Ethernet passive optical network EPON (Ethernet over Passive OpticalNetwork) system, relate in particular to the protection of EPON system; More particularly, the present invention relates to the trunk optical fibre protection inverting device and the method for EPON system.
Background technology
Along with the development of IP technology, produced a large amount of access technologies based on ethernet technology in recent years, Ethernet passive optical network EPON (Ethernet Passive Optical Network) is exactly one of them.EPON is proposed by first mile Ethernet EFM (Ethernet for theFirst Mile) working group of IEEE tissue, is one of up-to-date passive optical network PON (Passive OpticalNetwork) technology; It is as a kind of single fiber bi-directional Optical Access Network, point-to-multipoint network structure, passive fiber transmission means have been adopted, multiple business can be provided on Ethernet, and have that bandwidth is big, long transmission distance, no electromagnetic interference, safe, save advantages such as trunk optical fiber, networking flexibility.
As shown in Figure 1, a typical EPON system is made up of optical line terminal OLT (Optical LineTerminal), optical network unit ONU (Optical Network Unit) and Optical Distribution Network ODN (Optical Distribution Network).Wherein, described optical line terminal OLT is placed on the central machine room of local side; Described optical network unit ONU is placed in the corridor or family of user side; Be present in the Optical Distribution Network ODN between the two, include optical fiber, optical coupler, reach passive optical splitters POS passive devices such as (Passive Optical Splitter), be equipped with and do not include any active.In general, along with the maturation of 10G ether technology, the maximum rate that EPON can support is up to 10Gb/s; And its branches that can support is not less than 32 the road and 16 the tunnel; It can support 10KM and two kinds of maximum transmission distances of 20KM again, that is to say, described optical line terminal OLT is 20KM to the ultimate range between the described optical network unit ONU, but this optical network unit ONU can not break away from this optical line terminal OLT and work alone.
One of advantage of EPON system is to save trunk optical fiber, but this has also brought a risk simultaneously: in case the trunk optical fiber in this EPON system interrupts, all optical network unit ONU that will cause being connected to this trunk optical fiber are interrupted communication simultaneously.Therefore, in order to strengthen the reliability of EPON system, be necessary the EPON system is protected.Especially to each optical network unit ONU also continued access have 10 even more a plurality of users' FTTB (Fiber-To-The-Building, Fiber To The Building) type to use, more urgent to the demand that the EPON system protects.
The EPON industry standard, such as the EPON national standard draft of China " access network technology requires---based on the EPON (EPON) of Ethernet mode ", about protection EPON system recommendations dual mode, trunk optical fibre protection inverting and all-fiber protection switching; But do not provide the practical solutions of these two kinds of protected modes.And, up to now, also do not find any realization technical description both at home and abroad about these two kinds of protected modes.
Summary of the invention
At the above-mentioned active demand that the EPON system is protected; and prior art blank in this regard; the object of the invention is to provide a kind of trunk optical fibre protection inverting device and method, and it is applied to the EPON system and can effectively protects the trunk optical fiber of this EPON system.
In order to realize the foregoing invention purpose, the invention provides a kind of trunk optical fibre protection inverting device, it is applied to the EPON system, can effectively protect the trunk optical fiber of this EPON system;
This EPON system includes optical line terminal, the higher level equipment of described optical line terminal, optical network unit, and optical splitter; Wherein, have the active and standby relation of using between the described optical line terminal, one of described optical line terminal is the main optical line terminal of using, and two of described optical line terminal is this main standby optical line terminal with optical line terminal; Described main optical line terminal and the standby optical line terminal thereof used links to each other with same optical splitter, and the shunt of this optical splitter is than (m is the integer greater than 1, and the typical value of m is 2 for m: n; N is the integer greater than m, and the typical value of n is 16 or 32);
This trunk optical fibre protection inverting device is plugged between the higher level equipment of described optical line terminal and this optical line terminal, is made up of interchanger and controller:
Described interchanger, respectively with described optical line terminal, and the higher level equipment of this optical line terminal links to each other; Be used for relaying and transmit communication data between described optical line terminal and its higher level equipment; That is to say, the core network interface CNI of described optical line terminal (Core Network Interface) is cascaded to this interchanger, the grid interface SNI (System NetworkInterface) of described optical line terminal connects from this interchanger, make that different optical line terminals can be via same grid interface SNI and its higher level equipment communication, when taking place needn't to change corresponding uplink network interface configuration when optical line terminal is switched; And, if bandwidth expansion needs are arranged, also can continue to connect the grid interface that to be used for spread bandwidth from this interchanger;
Described controller, respectively with described optical line terminal, and described interchanger links to each other; What be used for the described optical line terminal of initial setting is active and standby with relation, and detects described mainly whether interrupt with optical line terminal light path of living in, is then switch described optical line terminal active and standby with concerning; In fact, this controller is essentially the CPU of this trunk optical fibre protection inverting device, and what it can also coordinate and manage this device respectively forms module, such as, control described interchanger.
Wherein,
Described interchanger can adopt ripe commercial Ethernet switching chip LanSwitch (Localarea network Switch);
Described controller can further be divided into by control module and detection module again and form, wherein: described detection module, respectively with described control module, and described optical line terminal links to each other; Whether be used to detect described master and interrupt with optical line terminal light path of living in, be then to send interrupting information to described control module; Described control module, respectively with described detection module, and described optical line terminal links to each other; Be used for the active and standby of the described optical line terminal of initial setting, and switch the active and standby of described optical line terminal with relation according to above-mentioned interrupting information with relation.
For above-mentioned trunk optical fibre protection inverting device,, judge that then this master interrupts with optical line terminal light path of living in if the described main error rate with optical line terminal reaches predetermined threshold value; Wherein, the described error rate is the frame error rate, or is bit error rate;
Perhaps, if double detection finds that have optical network unit (ONU) registration to arrive this master does not use optical line terminal, judge that then this master interrupts with optical line terminal light path of living in; Wherein, the preferred value in the time interval is 10ms between the described double detection.
In addition, the present invention also provides a kind of trunk optical fibre protection inverting method, and it is applied to the EPON system, can effectively protect the trunk optical fiber in this EPON system;
This EPON system includes optical line terminal, the higher level equipment of described optical line terminal, optical network unit, optical splitter, and the trunk optical fibre protection inverting device that provides of the invention described above; Wherein, described trunk optical fibre protection inverting device is plugged between described optical line terminal and the higher level equipment thereof; Have the active and standby relation of using between the described optical line terminal, one of described optical line terminal is the main optical line terminal of using, and two of described optical line terminal is this main standby optical line terminal with optical line terminal; Described main optical line terminal and the standby optical line terminal thereof used links to each other with a together individual optical splitter, and the shunt of this optical splitter is than (m is the integer greater than 1, and the typical value of m is 2 for m: n; N is the integer greater than m, and the typical value of n is 16 or 32);
At first execution in step 0, with before this trunk optical fibre protection inverting method of execution, and the active and standby relation of using of the described optical line terminal of initial setting; This step 0 includes following concrete operations:
Step 0-1, specifying one of described optical line terminal is the main optical line terminal of using, two of described optical line terminal is this main standby optical line terminal with optical line terminal;
Step 0-2 closes the laser of this standby optical line terminal;
Step 0-3 is configured one of described optical line terminal (the main optical line terminal of using), and configuration data is synchronized to two (standby optical line terminals) of described optical line terminal;
Execute after the above-mentioned steps 0, described optical network unit begins to be registered to this master and uses optical line terminal, and begins this master thus with the normal communication on the optical line terminal light path of living in, begins to carry out trunk optical fibre protection inverting method provided by the invention subsequently.This trunk optical fibre protection method includes:
Whether step 1 detects the master and interrupts with optical line terminal light path of living in, is then to continue step 2;
The detection method that may use when wherein, carrying out above-mentioned steps 1 has:
1) continue to detect this main error rate,, judge that then this master interrupts with optical line terminal light path of living in if this error rate reaches predetermined threshold value with optical line terminal; Wherein, the described error rate can be the frame error rate, also can be bit error rate; Perhaps,
2), detect the optical network unit (ONU) registration state of this master with optical line terminal every a time interval; If double detection finds there is not optical network unit (ONU) registration, judge that then this master interrupts with optical line terminal light path of living in; Wherein, the preferred value in the described time interval is 10ms.
If the testing result of above-mentioned steps 1 is interrupted with optical line terminal light path of living in for this master, also promptly the protection condition of switching is set up, then continues execution in step 2, to switch the active and standby with relation of described optical line terminal.This step 2 needs the concrete operation of carrying out to have:
Step 2-1 closes the main laser with optical line terminal that has interrupted;
Step 2-2, the laser of the main standby optical line terminal with optical line terminal of opening that this has interrupted, and to specify it be the new main optical line terminal of using;
Step 2-3 is configured with optical line terminal above-mentioned new master.
Execute after the above-mentioned steps 2, after also i.e. protection was switched and finished, described optical network unit began to be registered to this new master and uses optical line terminal, and began this new main normal communication of using on the optical line terminal light path of living in thus.
Generally speaking, execute after the above-mentioned steps 2, also will send a warning message, such as network management server NMS (Network Manage Server) to relevant device; And write down this time warning information in the relevant historical file, such as the daily record document.
Repeat above-mentioned steps 1 and step 2, switch, thereby realization is to effective protection of trunk optical fiber in the described EPON system described main in time the protection when interrupting with optical line terminal light path of living in.
The invention has the advantages that technical solution of the present invention has realized the trunk optical fibre protection inverting function of EPON system, strengthened the trunk light path automatically restoring fault function of this EPON system, and then improved the reliability of this EPON system.
Another advantage of the present invention is, implements the trunk optical fiber of technical solution of the present invention protection EPON system, protects when switching, needn't this EPON system of corresponding change in annexation between optical line terminal and its higher level equipment; Thereby investment is little and the construction complexity is low when making in existing EPON system the expansion technical solution of the present invention.
Further advantage of the present invention is, can adopt ripe commercial Ethernet switching chip as the interchanger in the trunk optical fibre protection inverting device provided by the invention, thereby makes technical solution of the present invention easily realize and realize that cost is lower.
Description of drawings
Fig. 1: typical EPON system block diagram
Fig. 2: the EPON system trunk optical fibre protection schematic diagram of industry standard suggestion
Fig. 3: the EPON system trunk optical fibre protection schematic diagram of using trunk optical fibre protection inverting device of the present invention
Fig. 4: the structural representation of one of trunk optical fibre protection inverting device embodiment of the present invention
Fig. 5: two the structural representation of trunk optical fibre protection inverting device embodiment of the present invention
Fig. 6: the flow chart of trunk optical fibre protection inverting method of the present invention
Embodiment
As previously mentioned; technical scheme provided by the invention has realized that the master of EPON system is in the optical fibre protection inverting function; introduce in this technical scheme the institutional framework of trunk optical fibre protection inverting device, and the steps flow chart of trunk optical fibre protection inverting method in detail below in conjunction with accompanying drawing.
At first comparison diagram 2 and Fig. 3, the problem that image understanding technical solution of the present invention need solve.Wherein, Fig. 2 is the schematic diagram of the EPON system trunk optical fibre protection of industry standard suggestion, and Fig. 3 is the schematic diagram of the EPON system trunk optical fibre protection of application trunk optical fibre protection inverting device of the present invention.
As shown in Figure 2, in the trunk optical fibre protection mode of industry standard recommendation: have active and standby optical line terminal (OLT# 1 with relation, OLT#2), be connected to respectively along separate routes than being 2: two ports of the optical splitter of n, from this optical splitter to optical network unit (ONU#1, ONU#2, ONU#3 ... ONU#n) then adopt conventional the connection; The protection of trunk optical fiber is switched and is only occurred between described optical splitter and the described optical line terminal like this; This protection switchover mode can be protected improving the reliability of EPON system the trunk optical fiber in the EPON system, and cost of investment is low.
But those skilled in the art should know, and Fig. 2 only shows the connection mode of EPON system trunk optical fibre protection, do not provide concrete attainable technical scheme; So, the object of the invention is, with reference to connection mode shown in Figure 2, provides practicable EPON system trunk optical fibre protection inverting technical scheme.
As mentioned above, EPON shown in Figure 3 system is with reference to the connection mode of EPON shown in Figure 2 system: have active and standby optical line terminal (OLT# 1 with relation, OLT#2), be connected to respectively along separate routes than being 2: two ports of the optical splitter of n, from this optical splitter to optical network unit (ONU#1, ONU#2, ONU#3 ... ONU#n) then adopt conventional the connection.In addition, Fig. 3 also shows trunk optical fibre protection inverting device provided by the invention: this trunk optical fibre protection inverting device respectively with described exist active and standby with the relation optical line terminal (OLT# 1, OLT#2) link to each other, be used for the described optical line terminal (OLT# 1 of initial setting, OLT#2) the active and standby relation of using, and main switch that this is active and standby with relation when interrupting detecting with optical line terminal light path of living in, make that this EPON system can recovery automatically from trunk light path fault in time; Simultaneously, described optical line terminal (OLT# 1, OLT#2) grid interface (SNI) connects from this trunk optical fibre protection inverting device, that is to say to be plugged on described optical line terminal by this trunk optical fibre protection inverting device (OLT# 1 is OLT#2) and between the higher level equipment; Like this, (OLT# 1 OLT#2) can make that protection takes place needn't change corresponding uplink network interface configuration when switching via same grid interface (SNI) and its higher level equipment communication to different optical line terminals.
Fig. 4 and Fig. 5 are respectively two the structural representation of one of embodiment of trunk optical fibre protection inverting device provided by the invention and embodiment: trunk optical fibre protection inverting device is plugged between optical line terminal (OLT# 1, OLT#2) and the higher level equipment thereof, and the grid interface (SNI#1) of described OLT#1, OLT#2 connects from this trunk optical fibre protection inverting device.
Need to prove, although Fig. 4 and Fig. 5 all only show 2 optical line terminals, but described two embodiment all support two and plural optical line terminal: the individual optical line terminal of every k (k is the integer greater than 1) is active and standby each other with relation, such as OLT# 1 ..., and OLT#k be one group, one of them is the main optical line terminal of using, and all the other then are the standby optical line terminal of this master with optical line terminal; When k equals 2, the general active and standby each other relation of using of two continuous optical line terminals of numbering of setting, such as OLT# 1 and OLT# 2 is one group, initial setting OLT# 1 be main be its standby optical line terminal with optical line terminal, OLT# 2, subsequently active and standby needs and switches with concerning according to the light path fault recovery; When k greater than 2 the time, 1 master has with the light line termination arrangement and is no less than 2 standby optical line terminal, is that cost further improves system reliability like this with the equipment redundancy; But in actual applications, give 1 main 1 standby optical line terminal of light line termination arrangement of using, just enough used in fact.
The institutional framework of one of trunk optical fibre protection inverting device embodiment provided by the invention is as shown in Figure 4: trunk optical fibre protection inverting device links to each other with optical line terminal (OLT# 1, OLT#2), and the grid interface (SNI#1) of optical line terminal (OLT#1, OLT#2) connects from this trunk optical fibre protection inverting device.
This trunk optical fibre protection inverting device is made up of interchanger and controller:
Described interchanger, level is coupled between the higher level equipment of the core network interface (CNI#1, CNI#2) of optical line terminal (OLT#1, OLT#2) and optical line terminal (OLT#1, OLT#2), is used for relaying and transmits communication data between described optical line terminal and its higher level equipment; The grid interface (SNI#1) of optical line terminal (OLT#1, OLT#2) connects from this interchanger, make that different optical line terminal (OLT#1, OLT#2) can be via same grid interface (SNI#1) and its higher level equipment communication, so that taking place needn't to change corresponding uplink network interface configuration when optical line terminal is switched; And, if bandwidth expansion needs are arranged, also can connect the grid interface (SNI#2) that to be used for spread bandwidth from this interchanger;
Described controller, respectively with optical line terminal (OLT# 1, OLT#2), and described interchanger links to each other; Whether what be used for the described optical line terminal of initial setting is active and standby with relation, and detect and mainly interrupt with optical line terminal light path of living in, be then switch active and standby with concerning; 1), continue to detect the error rate of this master usefulness optical line terminal wherein, the main method of whether having interrupted with optical line terminal light path of living in of described detection has:; If this error rate reaches predetermined threshold value, judge that then this master interrupts with optical line terminal light path of living in; Wherein, the described error rate is the frame error rate, or is bit error rate; Perhaps, 2), every an assay intervals, detect the optical network unit (ONU) registration state of this master with optical line terminal, if double detection finds there is not optical network unit (ONU) registration, judge that then this master interrupts with optical line terminal light path of living in; Wherein, the preferred value of described assay intervals is 10ms.
In addition, those skilled in the art's simple application specialty general knowledge should be understood that: this controller is essentially the CPU of this trunk optical fibre protection inverting device, and what it can also coordinate and manage this device respectively forms module; Such as, control the work of described interchanger.
Two the institutional framework of trunk optical fibre protection inverting device embodiment provided by the invention as shown in Figure 5, two of this embodiment has with the difference of one of the foregoing description:
(1) interchanger shown in Fig. 4 is specially Ethernet switching chip in Fig. 5:
Ethernet switching chip (LanSwitch, Local area network Switch) is mature technique commodity very, the Ethernet switching chip that can buy high, medium and low various class from the market easily.And LanSwitch is a MAC layer equipment, by to mechanism such as input data source address study, can realize the clog-free intercommunication between its all of the port, just realizes the exchange of data between its each port.
Adopt the existing Ethernet exchange chip as the interchanger in the trunk optical fibre protection inverting device of the present invention, not only can reduce this Design of device cost; Can also when minimizing enforcement technical solution of the present invention is carried out trunk optical fibre protection inverting, dispose the workload of the uplink network interface of optical line terminal by utilizing the characteristics of clog-free intercommunication between each port of Ethernet switching chip.
(2) controller shown in Fig. 4 is specially in Fig. 5 by control module and detection module and forms:
Described detection module, respectively with described control module, and described optical line terminal links to each other; Whether be used to detect described master and interrupt with optical line terminal light path of living in, be then to send interrupting information to described control module.
Described control module, respectively with described detection module, and described optical line terminal links to each other; Be used for the active and standby of the described optical line terminal of initial setting, and switch the active and standby of described optical line terminal with relation according to above-mentioned interrupting information with relation.
Figure 6 shows that the flow chart of trunk optical fibre protection inverting method provided by the invention,, this method is explained in detail below in conjunction with the EPON system trunk optical fibre protection schematic diagram of application trunk optical fibre protection inverting device of the present invention shown in Figure 3.
At first; as shown in Figure 6; in this trunk optical fibre protection inverting method of execution (comprising step 1 shown in Figure 6 and step 2 shown in Figure 6) before; need to carry out an initialize process; promptly carry out step 0 shown in Figure 6; with optical line terminal shown in initial setting Fig. 3 (OLT# 1, the active and standby relation of using OLT# 2).As shown in Figure 6, this step 0 includes following concrete operations:
Step 0-1, specifying one of optical line terminal (OLT#1) is the main optical line terminal of using, two (OLT#2) of optical line terminal are this main standby optical line terminal with optical line terminal;
Step 0-2 closes the laser of this standby optical line terminal (OLT#2);
Step 0-3 is configured with optical line terminal (OLT#1) main, and configuration data is synchronized to its standby optical line terminal (OLT#2).
Execute after the above-mentioned steps 0; optical network unit shown in Fig. 3 (ONU# 1, ONU# 2 ..., ONU#n) begin to be registered to main with optical line terminal (OLT#1); begin the normal communication on this master's usefulness optical line terminal (OLT#1) light path of living in thus, and begin to carry out trunk optical fibre protection method provided by the invention thus.As shown in Figure 6, this trunk optical fibre protection method includes:
Whether step 1 detects the master and interrupts with optical line terminal light path of living in, is then to continue step 2;
The detection method that may use when wherein, carrying out above-mentioned steps 1 has:
1) continue to detect the main error rate,, judge that then this master interrupts with optical line terminal light path of living in if this error rate reaches predetermined threshold value with optical line terminal; Wherein, this error rate can be the frame error rate, also can be bit error rate; Perhaps,
2) every a time interval, detect this master optical network unit (ONU) registration state with optical line terminal, if double detection finds there is not optical network unit (ONU) registration, judge that then this master interrupts with optical line terminal light path of living in; Preferred value that wherein should the time interval is 10ms.
And the concrete operations that above-mentioned steps 2 needs to carry out have:
Step 2-1 closes the main laser with optical line terminal that has interrupted;
Step 2-2 opens the laser of the main standby optical line terminal with optical line terminal that has interrupted, and to specify it be the new main optical line terminal of using;
Step 2-3 is configured with optical line terminal above-mentioned new master.
Execute after the above-mentioned steps 2; after also i.e. protection is switched and is finished; optical network unit shown in Fig. 3 (ONU# 1, ONU# 2 ..., ONU#n) begin to be registered to this and new mainly use optical line terminal, begin the normal communication on this new main usefulness optical line terminal light path of living in thus.
With regard to general knowledge known in this field, execute after the above-mentioned steps 2, generally also can send a warning message to relevant device, such as network management server NMS (Network Manage Server); And write down this time warning information in the relevant historical file, such as the daily record document.
Repeat above-mentioned steps 1 and step 2, when the master is interrupted with optical line terminal light path of living in, in time protect and switch, thereby effectively protect trunk optical fiber in the system of EPON shown in Fig. 3.
Using trunk optical fibre protection inverting device provided by the invention and method protects the EPON system, relevant experimental data shows: under the situation that 1 optical network unit ONU registration is arranged, pull out the just main optical line terminal optical fiber of living in of using in communication, this EPON system can finish protection and switch in 50ms; Under the situation that 32 optical network unit ONU registrations are arranged, pull out the just main optical line terminal optical fiber of living in of using in communication, this EPON system can finish protection and switch in 30s.Prove that thus technical scheme provided by the invention is practicable.
(detail formula please refer to Glen Kramer in calculating according to theoretical formula, Ethernet PassiveOptical Networks, The McGraw-Hill Companies Inc), use technical solution of the present invention and carry out trunk optical fibre protection inverting, the service outage duration of described EPON system is reduced to original 51.6%; In addition, by the combination of a plurality of optical splitters, the service outage duration of described EPON system can be reduced to original 1.73e-5 (7/100000ths).
What need statement is that foregoing invention content and embodiment are intended to prove the practical application of technical scheme provided by the present invention, should not be construed as the qualification to protection range of the present invention.Those skilled in the art are in spirit of the present invention and principle, when doing various modifications, being equal to and replacing or improve.Protection scope of the present invention is as the criterion with appended claims.
Claims (13)
1. trunk optical fibre protection inverting device, it is applied to the EPON system; This EPON system includes optical line terminal, the higher level equipment of described optical line terminal, optical network unit, and optical splitter; Wherein, have the active and standby relation of using between the described optical line terminal, wherein the master all links to each other with same optical splitter with its corresponding standby optical line terminal of optical line terminal;
It is characterized in that: this trunk optical fibre protection inverting device is plugged between the higher level equipment of described optical line terminal and this optical line terminal, includes interchanger and controller; Wherein,
Described interchanger, respectively with described optical line terminal, and the higher level equipment of this optical line terminal links to each other; Be used for relaying and transmit communication data between described optical line terminal and its higher level equipment;
Described controller, respectively with described optical line terminal, and described interchanger links to each other; What be used for the described optical line terminal of initial setting is active and standby with relation, and detects described mainly whether interrupt with optical line terminal light path of living in, is then switch described optical line terminal active and standby with concerning.
2. trunk optical fibre protection inverting device as claimed in claim 1 is characterized in that, described interchanger is an Ethernet switching chip.
3. trunk optical fibre protection inverting device as claimed in claim 1 or 2 is characterized in that described controller includes detection module, and control module;
Described detection module, respectively with described control module, and described optical line terminal links to each other; Whether be used to detect described master and interrupt with optical line terminal light path of living in, be then to send interrupting information to described control module;
Described control module, respectively with described detection module, and described optical line terminal links to each other; Be used for the active and standby of the described optical line terminal of initial setting, and switch the active and standby of described optical line terminal with relation according to above-mentioned interrupting information with relation.
4. trunk optical fibre protection inverting device as claimed in claim 1 or 2 is characterized in that:
Detect the described main error rate,, judge that then this master interrupts with optical line terminal light path of living in if this error rate reaches pre-section threshold value with optical line terminal;
Perhaps,, detect described main optical network unit (ONU) registration state,, judge that then this master interrupts with optical line terminal light path of living in if double detection finds there is not optical network unit (ONU) registration with optical line terminal every a time interval.
5. trunk optical fibre protection inverting device as claimed in claim 4 is characterized in that, the described error rate is the frame error rate, or is bit error rate.
6. trunk optical fibre protection inverting device as claimed in claim 4 is characterized in that the described time interval equals 10ms.
7. trunk optical fibre protection inverting method, it is applied to the EPON system; This EPON system includes optical line terminal, the higher level equipment of described optical line terminal, optical network unit, and optical splitter; Wherein, have the active and standby relation of using between the described optical line terminal, wherein the master links to each other with same optical splitter with its corresponding standby optical line terminal of optical line terminal;
It is characterized in that: this trunk optical fibre protection inverting method includes the following step:
Whether step 1 detects to lead in the described optical line terminal and interrupts with optical line terminal light path of living in, is then to continue following step 2;
Step 2 is switched the active and standby with relation of described optical line terminal.
8. trunk optical fibre protection inverting method as claimed in claim 7 is characterized in that, described step 1 is specially: detect the described main error rate with optical line terminal; If this error rate reaches predetermined threshold value, judge that then this master interrupts with optical line terminal light path of living in;
Perhaps be specially:, detect described main optical network unit (ONU) registration state with optical line terminal every a time interval; If double detection finds there is not optical network unit (ONU) registration, judge that then this master interrupts with optical line terminal light path of living in.
9. trunk optical fibre protection inverting method as claimed in claim 8 is characterized in that, the described error rate is the frame error rate, or is bit error rate.
10. trunk optical fibre protection inverting method as claimed in claim 8 is characterized in that the described time interval equals 10ms.
11. trunk optical fibre protection inverting method as claimed in claim 7 is characterized in that, described step 2 includes the following step again:
Step 2-1 closes the main laser with optical line terminal that has interrupted;
Step 2-2 opens this master laser with the standby optical line terminal of optical line terminal, and to specify it be the new main optical line terminal of using;
Step 2-3 is configured with optical line terminal above-mentioned new master.
12. trunk optical fibre protection inverting method as claimed in claim 7 is characterized in that, before this method of execution, and the active and standby relation of using of the described optical line terminal of initial setting.
13. trunk optical fibre protection inverting method as claimed in claim 12 is characterized in that, the active and standby of the described optical line terminal of described initial setting specifically includes the following step with relation:
Step 0-1 specifies main optical line terminal and the corresponding standby optical line terminal thereof used in the described optical line terminal;
Step 0-2 closes the laser of this standby optical line terminal;
Step 0-3 is configured with optical line terminal this master, and configuration data is synchronized to its standby optical line terminal.
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| CNA2006101398308A CN1925371A (en) | 2006-09-20 | 2006-09-20 | Trunk optical fibre protection inverting device and method for EPON system |
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Cited By (11)
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| WO2009043290A1 (en) * | 2007-09-26 | 2009-04-09 | Huawei Technologies Co., Ltd. | A method, a system and an apparatus for protection in a long reach passive optical network |
| WO2010130123A1 (en) * | 2009-05-14 | 2010-11-18 | 中兴通讯股份有限公司 | Method and apparatus for implementing trunk optical fiber protection in ethernet passive optical network (epon) |
| CN101958751A (en) * | 2010-09-27 | 2011-01-26 | 中兴通讯股份有限公司 | Protection method and device of optical network |
| WO2011022966A1 (en) * | 2009-08-27 | 2011-03-03 | 华为技术有限公司 | Joint switching method for aggregation node, aggregation node and system thereof |
| WO2011038591A1 (en) * | 2009-09-30 | 2011-04-07 | 华为技术有限公司 | Method, device and system for master-backup switching in passive optical network (pon) |
| CN102301781A (en) * | 2009-02-03 | 2011-12-28 | 日本电气株式会社 | Wireless transmission method and wireless transmission device |
| CN101521543B (en) * | 2009-03-20 | 2012-01-18 | 浙江工业大学 | Passive optical network trunk optical fibre link protecting device |
| CN101729944B (en) * | 2008-10-24 | 2013-07-17 | 株式会社日立制作所 | Optical access system and optical line terminal |
| CN103931209A (en) * | 2011-11-10 | 2014-07-16 | 阿尔卡特朗讯 | Apparatus and method for providing protection in a passive optical network |
| CN105792027A (en) * | 2014-12-22 | 2016-07-20 | 中兴通讯股份有限公司 | Passive optical network system, controller and communication method |
| WO2020063685A1 (en) * | 2018-09-25 | 2020-04-02 | 中兴通讯股份有限公司 | Optical network system, olt, signal transmission method and readable storage medium |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2009043290A1 (en) * | 2007-09-26 | 2009-04-09 | Huawei Technologies Co., Ltd. | A method, a system and an apparatus for protection in a long reach passive optical network |
| US8380061B2 (en) | 2007-09-26 | 2013-02-19 | Huawei Technologies Co., Ltd. | Method, system and device for protecting long-reach passive optical network |
| CN101729944B (en) * | 2008-10-24 | 2013-07-17 | 株式会社日立制作所 | Optical access system and optical line terminal |
| US8923111B2 (en) | 2009-02-03 | 2014-12-30 | Nec Corporation | Wireless transmission method and wireless transmission device |
| CN102301781A (en) * | 2009-02-03 | 2011-12-28 | 日本电气株式会社 | Wireless transmission method and wireless transmission device |
| CN101521543B (en) * | 2009-03-20 | 2012-01-18 | 浙江工业大学 | Passive optical network trunk optical fibre link protecting device |
| WO2010130123A1 (en) * | 2009-05-14 | 2010-11-18 | 中兴通讯股份有限公司 | Method and apparatus for implementing trunk optical fiber protection in ethernet passive optical network (epon) |
| US8724453B2 (en) | 2009-05-14 | 2014-05-13 | Zte Corporation | Method and apparatus for implementing trunk optical fiber protection in ethernet passive optical network (EPON) |
| CN101888268B (en) * | 2009-05-14 | 2013-09-11 | 中兴通讯股份有限公司 | Method and device for realizing backbone optical fiber protection in Ethernet passive optical network |
| US8755685B2 (en) | 2009-08-27 | 2014-06-17 | Huawei Technologies Co., Ltd. | Joint switching method for an aggregation node, aggregation node and system |
| US20120134664A1 (en) * | 2009-08-27 | 2012-05-31 | Huawei Technologies Co., Ltd. | Joint switching method for an aggregation node, aggregation node and system |
| WO2011022966A1 (en) * | 2009-08-27 | 2011-03-03 | 华为技术有限公司 | Joint switching method for aggregation node, aggregation node and system thereof |
| WO2011038591A1 (en) * | 2009-09-30 | 2011-04-07 | 华为技术有限公司 | Method, device and system for master-backup switching in passive optical network (pon) |
| CN101958751A (en) * | 2010-09-27 | 2011-01-26 | 中兴通讯股份有限公司 | Protection method and device of optical network |
| CN101958751B (en) * | 2010-09-27 | 2015-04-01 | 中兴通讯股份有限公司 | Protection method and device of optical network |
| CN103931209A (en) * | 2011-11-10 | 2014-07-16 | 阿尔卡特朗讯 | Apparatus and method for providing protection in a passive optical network |
| CN105792027A (en) * | 2014-12-22 | 2016-07-20 | 中兴通讯股份有限公司 | Passive optical network system, controller and communication method |
| CN105792027B (en) * | 2014-12-22 | 2019-11-29 | 南京中兴新软件有限责任公司 | Passive optical network, controller and the method for communication |
| WO2020063685A1 (en) * | 2018-09-25 | 2020-04-02 | 中兴通讯股份有限公司 | Optical network system, olt, signal transmission method and readable storage medium |
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