CN102611519B - Method and device for link protection of passive optical network - Google Patents
Method and device for link protection of passive optical network Download PDFInfo
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- CN102611519B CN102611519B CN201010561631.2A CN201010561631A CN102611519B CN 102611519 B CN102611519 B CN 102611519B CN 201010561631 A CN201010561631 A CN 201010561631A CN 102611519 B CN102611519 B CN 102611519B
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Abstract
In order to enhance the reliability and stability of the existing passive optical network, the invention provides a method and device for link protection of a passive optical network. The method comprises synchronizing control information of a master central office control chip and a slave central office control chip in network equipment; determining whether or not a first predetermined condition is met; and closing an optical module corresponding to the master central office control chip and opening an optical module corresponding to the slave central office control chip when the first predetermined condition is met.
Description
Technical field
The present invention relates to EPON, particularly relate to method and apparatus EPON being carried out to link protection.
Background technology
Dispose for carrying important service, the Access Network based on ethernet passive optical network (Ethernet-based Passive Optical Network, EPON) of such as VoIP (Voice over IP) and video traffic needs the network moment to be in the state of connection.There is not active element (active component) in EPON, therefore, operator can keep network be communicated with always and operate between central office and terminal use.But other parts of network also need to be protected.Such as, optical fiber is easily subject to the link failure caused by the reason such as fiber cut or intolerable degraded signal quality.
Optical element such as laser etc. usually can become bad or lose efficacy, thus causes service disconnection a period of time and reduce Consumer's Experience.In addition, the electronic component on optical line terminals clamp (Optical LineTermination, optical line terminal) is easy complete failure also.Therefore, operator must carry out Redundant Ethernet passive optical network backup system.
Summary of the invention
For strengthening the reliability and stability of existing passive optical-fiber network, the invention provides a kind of method and apparatus EPON being carried out to link protection.In the method, synchronous main station end control chip and the control information from local side control chip in the network equipment; And judge whether first predetermined condition; When meeting described first predetermined condition, closing the optical module corresponding to main station end control chip and opening from the optical module corresponding to local side control chip.
According to a first aspect of the invention, provide and a kind ofly control at the main station end control chip of described passive optical network optical line terminal with from the method for carrying out link protection between local side control chip in the network equipment of EPON, wherein, described EPON comprises described optical line terminal and at least one optical network unit, and the method comprises the following steps: synchronous described main station end control chip and the described control information from local side control chip; Described method also comprises: a. judges whether first predetermined condition; B., when meeting described first predetermined condition, closing the optical module corresponding to described main station end control chip and opening described from the optical module corresponding to local side control chip.
According to a second aspect of the invention, provide and a kind ofly control at the main station end control chip of described passive optical network optical line terminal with from the device carrying out link protection between local side control chip in the network equipment of EPON, wherein, described EPON comprises described optical line terminal and at least one optical network unit, this device comprises: synchronizer, for synchronous described main station end control chip and the described control information from local side control chip; Described device also comprises: judgment means, for judging whether first predetermined condition; Processing unit, when meeting described first predetermined condition, cutting out the optical module corresponding to described main station end control chip and opening described from the optical module corresponding to local side control chip.
According to embodiments of the invention; fault protection system in the clamp of line terminal and between the clamp of line terminal can be provided; preferably; in certain embodiments, by the registration parameter of Synchronous Optical Network unit, when a handover occurs; optical network unit does not need to register to from local side control chip again; thus shorten service outage duration, therefore, MPCP discovery time can be ignored.In addition, in certain embodiments, dynamic application data also can be synchronous between master and slave local side control chip, also reduce further service outage duration, and setting up link aggregation group by the redundancy group for being made up of master and slave local side control appliance, avoiding the generation owing to switching the Medium Access Layer address conflict produced.
Accompanying drawing explanation
Read the following detailed description to non-limiting example by referring to accompanying drawing, other features, objects and advantages of the present invention will become more obvious.
Fig. 1 shows the system architecture diagram of ethernet passive optical network in prior art;
Fig. 2 shows the optical line terminal clamp element according to a specific embodiment of the present invention;
Fig. 3 shows the backup protection mechanism according to a specific embodiment of the present invention;
Fig. 4 shows the backup protection Mechanism establishing process according to a specific embodiment of the present invention;
Fig. 5 shows and is switched to switching flow from local side control chip from main station end control chip according to a specific embodiment of the present invention when first predetermined condition;
Fig. 6 show according to a specific embodiment of the present invention when second predetermined condition from the switching flow being switched to main station end control chip from local side control chip;
Fig. 7 shows the device block diagram according to a specific embodiment of the present invention.
Wherein, same or analogous Reference numeral represents same or analogous steps characteristic or device/module.
Embodiment
Fig. 1 is described for ethernet passive optical network, is appreciated that the present invention is applicable to gigabit Ethernet (Gigabyte Passive Optical Network, GPON) too.Ethernet passive optical network system shown in Fig. 1 comprises optical line terminal and optical network unit, and wherein, optical line terminal is local side apparatus, and it such as can be arranged in switch central office, and optical network unit is arranged in the user domain of far-end.Active element is not had in a switch between centre office and terminal use.
In FIG, ethernet passive optical network optical line terminal is by ether metropolitan area network (EthernetMetropolitan Access Network, EMAN) with the SMS service center (EMS) at network side, public switch telephone network (Public Switched Telephone Network, PSTN), video server and/or voice gateways are connected, and by optical splitter and optical network unit (Optical Network Unit, ONU) be connected, and subscriber terminal equipment, such as computer, television set, Set Top Box phone or mobile phone etc., by local area network (LAN) (Local Area Network, LAN), residence gateway, the modes such as wireless access, access ethernet passive optical network.
In Complex Structural System, optical line terminal (Optical Line Termination, OLT) network terminal clamp (Network Termination board is generally included, NT board) and line terminal clamp (Line Termination board, LT board).EPON MAC chip in optical line terminal clamp is responsible for usually for the treatment of affairs protocol-dependent with EPON.Exchange chip in circuit terminal card plate is responsible for the convergence for carrying out data flow to different EPON MAC chips, and the exchange chip in network terminal clamp is responsible for the convergence different line terminal clamps being carried out to data flow.Hereinafter, the EPON MAC chip in the clamp of line terminal is referred to as local side control chip by us.
In order to realize system-level EPON link redundancy, the trigger condition of different stage needs be detected and processed by the handover triggering condition right as PON redundancy.
Above-mentioned trigger condition comprises any one in the following:
1) input optical signal of EPON loses (LOS);
2) input channel channel degradation:
Such as, the input optical signal power of EPON is higher than the first predetermined threshold or lower than the second predetermined threshold; The bit error rate of EPON is more than the 3rd predetermined threshold;
3) device hardware fault:
Such as, optical module fault, such as, the optical module fault corresponding to main station end control chip; PON MAC failure of chip (being applicable to situation about protecting between different PON MAC chip); Board faults (being applicable to the situation of PON inter-board protection).
It will be understood by those skilled in the art that first, second, and third above-mentioned predetermined threshold can be set by network manager according to the network design situation of reality, certainly, these threshold values also can adjust according to concrete network condition.
Fig. 2 shows the optical line terminal according to a specific embodiment of the present invention.Wherein, optical line terminal comprises a network terminal clamp and at least one line terminal clamp, wherein, network terminal clamp comprises network terminal processor and network terminal exchange chip, line terminal clamp comprises line terminal processor, line terminal exchange chip and EPON MAC chip, in addition, line terminal clamp also comprises optical module, can be exported control the opening and closing of optical module luminescence by universal input.Optical Network Terminal element is connected with optical network unit.
Fig. 3 shows the backup protection mechanism according to a specific embodiment of the present invention.Wherein, the outlet of two optical modules of optical line terminal is connected with N number of optical network unit by the optical splitter of 2:N.As shown in Figure 3, each optical network unit also comprises optical module and EPON MAC chip.
Fig. 4 shows the backup protection Mechanism establishing process according to a specific embodiment of the present invention.Below, with reference to Fig. 2 and Fig. 3, the step shown in Fig. 4 is specifically described.Below, first be positioned at different line terminal clamps for local side control chip 1 and local side control chip 2 to be described, therefore controlled to main station end control chip with from the data syn-chronization between local side control chip and switching by the processor of network terminal clamp 3.
First, in step s 40, the processor of network terminal clamp 3 passes through NMP, such as Simple Network Management Protocol (Simple Network Management Protocol, SNMP) creates redundancy group, such as, the processor of network terminal clamp 3 is using the backup of local side control chip 2 as local side control chip 1, therefore, below local side control chip 2 is called from local side control chip 2, local side control chip 1 is called main station end control chip 1.
Then, in step S41, redundancy group information stores in a database by the processor of network terminal clamp 3.Be appreciated that because the stability of network terminal clamp is strong, and the data after power down on network terminal clamp also can not be lost, therefore, preferably, redundancy group information is stored on network terminal clamp.
Then, in step S42, the processor of network terminal clamp 3 is arranged through universal input and exports unlatching or the cut out that (GPIO, General Purpose Input and Output) controls optical module.In this step, first export the control optical module corresponding with main station end control chip 1 by universal input open and control and close from the optical module that local side control chip 2 is corresponding.Therefore, the light path corresponding with main station end control chip 1 is conducting, and data can pass through photoelectric conversion module, via the exchange of main station end control chip 1, optical splitter etc., arrives optical network unit.Although and send light signal from local side control chip 2 always, but, owing to being close from the optical module corresponding to local side control chip 2, therefore, with from the non-conducting of light path corresponding to local side control chip 2, thus can not optical network unit be arrived from the signal that local side control chip 2 sends.Those skilled in the art it should be noted that synchronization, one can only be had to be in conducting state in master and slave local side control chip, otherwise if the conducting simultaneously of master and slave local side control chip, the superposition of light signal can not produce any useful data.
Then, in step S43, the processor synchronous main station end control chip of network terminal clamp 3 and from the control information between local side control chip.
Particularly, in step S430, the processor of network terminal clamp 3 obtains the static configuration information of main station end control chip, this static configuration information is stored in outside compact flash (Compact Flash by the data base management system of the network terminal, CF) in card, to prevent the loss of static configuration information after power down.In order to make accompanying drawing simple and clear, we in the drawings and each sub-steps of not shown step S43.
Then, in step S431, the static configuration information obtained from main station end control chip 1 provides and configures to from local side control chip 2 by the processor of network terminal clamp 3.Static configuration information is copied to from local side control chip 2 from main station end control chip 1, ensure that from all data paths on local side control chip and data flow all pre-configured, thus when the reason such as to break down carry out backup switch time, can control immediately to send the data required for user terminal from local side control chip 2.Because data need to be obtained and by network terminal clamp 3 to providing from local side control chip 2 on another line terminal clamp 5 to the main station end control chip 1 on a line terminal clamp 4 by network terminal clamp 3, therefore, the reliable communication mechanism between network terminal clamp and line terminal clamp must be protected.
Then, in step S432, the processor of network terminal clamp 3 obtains the log-on message of each online optical network unit.Some log-on messages, such as LLID (Logical Link ID, LLID), just distribute to main station end control chip 1 when optical network unit is successfully registered to optical line terminal, also, these log-on messages dynamically generate.Therefore, for each optical network unit being registered to the main station end control chip 1 of optical line terminal, the processor of network terminal clamp 3 all needs to obtain these log-on messages, and is supplied to from local side control chip 2.
Then, in step S433, the registration parameter of each online optical network unit obtained is supplied to from local side control chip 2 by the processor of network terminal clamp 3.
Then, in step S434, the processor of network terminal clamp 3 obtains the dynamic protocol parameter of main station end control chip 1.This dynamic protocol parameter comprises Internet Group Management Protocol (Internet Group Management Protocol, IGMP) channel, address resolution protocol (Address Resolution Protocol, ARP) session, DHCP (Dynamic host configuration protocol, DHCP) or by Ethernet point-to-point protocol (Point-to-Point Protocol over Ethernet is transmitted, PPPoE) session, Option82 information, etc.
Then, in step S435, the dynamic protocol parameter of acquisition is supplied to from local side control chip 2 by the processor of network terminal clamp 3.
Then, in step S436, the processor of network terminal clamp 3 obtains the Medium Access Layer learning table that main station end control chip 1 obtains.Main station end control chip 1 (being equivalent to switch) is from its connected all of the port receiving media Access Layer (Media Access Control, MAC) address information, such as, by resolving the packet header of the uplink access request packet of user terminal, obtain the source address information of each packet, and address information certification passed through is kept at mac address table and safeguards this mac address table.When main station end control chip 1 receives the frame data from network side, it is carried out filtering such as abandoning by these frame data by deciding according to the mac address table of oneself, or forwards.Now, this MAC table of maintenance is exactly MAC Address address forwarding table (Forward Database, FDB).
Address list item in FDB address table can be added into by following two approach:
Switch self study: switch according to the source MAC of the packet received, port, VLANID, can upgrade FDB address table automatically.
Manual increase: can by the manual address list item that increases of command line interface in FDB address table.
Notice, these mac learning tables are all stored in main station end control chip 1 place usually, therefore, in order to ensure, being switched to from not packet loss during local side control chip 2, also to need mac learning table synchronous with main station end control chip 1 from local side control chip 2.
Therefore, in step S437, the Medium Access Layer learning table obtained from main station end control chip 1 is supplied to from local side control chip 2 by the processor of network terminal clamp 3.
Preferably, the generation of MAC Address conflict after switching to prevent optical link, such as, network receives the packet with identical MAC Address from different port thus thinks MAC Address conflict occurs and process according to certain strategy, such as by after the generation of the situation of data packet discarding that receives, the processor of the network terminal 3 is main station end control chip 1 and from local side control chip 2 link generation aggregation group (Link Aggregation Group, LAG), wherein, main station end control chip 1 and there is from local side control chip 2 index of same aggregated links group, this index is used for carrying out Medium Access Layer address learning, thus just avoid after switching occurs, since the port of the data of local side control chip 2 is different from the port of main station end control chip 1 and be considered to MAC Address conflict and abandon.
In addition, in another embodiment, consider that the main optical path that main station end control chip 1 controls is different with the length of the optical cable from light path controlled from local side control chip 2, also be, light path is different, such as, optical splitter is constant to the distance of optical network unit, but the light path of the optical module corresponding to from optical splitter to main station end control chip 1 is 2 kilometers, it is 20 kilometers from optical splitter to the light path from the optical module corresponding to local side control chip 2, therefore, if be switched to after local side control chip 2 from main station end control chip 1, Loop Round Trip Time (RoundTrip Time, RTT) difference is had, and local side control chip adopts time-multiplexed mode to be the service of multiple optical network unit usually, so after a handover, the mistake of transfer of data can be caused.Therefore, in order to compensate the difference due to the light path from the light path corresponding to local side control chip 2 and main station end control chip 1, in a preferred embodiment, can after this network design well, network manager manually closes the optical module corresponding to main station end control chip 1 and opens from the optical module corresponding to local side control chip 2, to obtain the distance between main station end control chip 1 and each optical network unit and the difference from the distance between local side control chip 2 and each optical network unit.Certainly, when under the condition that the spacing of optical splitter and each optical network unit is constant, each optical network unit from same main station end control chip be switched to same from local side control chip to produce optical path difference be identical.
In addition, the state that is equipped with in optical network unit keeps function.Optical network unit is under the control of the OAM message (HoldoverConfig attribute) of optical line terminal, between optical line terminal optical link lost efficacy (as dropout, or channel degradation) after, optical network unit can at certain hour (state retention time, holdover time) in remain on " registration " state, and do not understand registration.If optical network unit cannot re-establish optical link with optical line terminal in state retention time, then optical network unit solution registration.
After the state of optical network unit keeps function that the optical link for subsequent use of optical network unit and optical line terminal is re-established, optical network unit does not need to restart to find, registration, less on the impact of business when ensureing optical link protection switching.
In another embodiment, in step S44, when completing after from main station end control chip 1 to the switching from local side control chip 2, the processor of network terminal clamp 3 also needs to judge from opening after from local side control chip 2, whether the time not receiving any registration request from optical network unit from local side control chip 2 exceedes the scheduled time, if exceed the scheduled time, then close from the optical module corresponding to local side control chip 2 and the optical module opened corresponding to main station end control chip 1.
In addition, in another embodiment, if the processor of network terminal clamp 3 receive from network manager switch to the instruction of main station end control chip 1 after, the processor of network terminal clamp 3 controls to cut out from the optical module corresponding to local side control chip 2 and the optical module opened corresponding to main station end control chip 1.
Certainly, if after switching back main station end control chip 1, after exceeding the scheduled time, still carry out registering to this main station end control chip 1 without any optical network unit, can switch back again from local side control chip 2.In other words, after from any one link switching to another link, if registered on another link without any optical network unit in the scheduled time, then automatically switch back former link, until have optical network unit (ONU) registration on some links.
Certainly, above-mentioned registration both comprised new registration, be also included within first to master (from) local side control chip succeeds in registration, still in the state keeping activating under (master) local side control chip after switching, such as, by receiving data from (master) local side control chip.
In each embodiment above-mentioned, all for main station end control chip 1 be positioned at different line terminal clamps from local side control chip 2 and be described.Be appreciated that, when main station end control chip 1 with when being positioned at the clamp of same line terminal from local side control chip 2, such as, when being all positioned on line terminal clamp 4, the processor of line terminal clamp 4 can the steps flow chart that carries out of the processor of alternate network terminal clamp 3 completely.
Fig. 5 shows and is switched to switching flow from local side control chip 2 from main station end control chip 1 according to a specific embodiment of the present invention when first predetermined condition.Still control main station end control chip 1 with network terminal clamp 3 and be described from the example that switches between local side control chip 2.
First, in step s 51, the warning information that main station end control chip 1 is lost to the processor report signal of line terminal clamp 4, the alarm information of this dropout is a handover triggering condition.Certainly, above specifically list other handover triggering conditions, do not repeat them here.
Then, in step S52, a Preset Time waited for by the processor of line terminal clamp 4, and in other words, this handover triggering condition continue for Preset Time, then the method enters lower step.Alternatively, whether the processor of line terminal clamp 4 can detect handover triggering condition again and meet, if again detected, trigger condition still meets, then the method enters next step, also namely, the method enters in step S53, and the processor of line terminal clamp 4 is by the processor of this alarm information informing network terminal clamp 3.
Then, in step S54, whether the processor of network terminal clamp 3 judges main station end control chip 1 and is positioned at the clamp of same line terminal from local side control chip 2.Main station end control chip 1 and be in the static configuration information produced when being kept at network design from local side control chip 2 information whether be in the card of same line terminal, is stored in the CF of network terminal clamp.
If main station end control chip 1 and be positioned at same line terminal clamp from local side control chip 2, such as, when being all positioned on line terminal clamp 4, then the method enters step S55, and the processor of the processor announcement trunk terminal clamp 4 of network terminal clamp 3 directly controls the switch of optical module.Particularly, the processor of line terminal clamp 4 is opened from the optical module corresponding to local side control chip 2, and closes from the optical module corresponding to local side control chip 2.
Otherwise, if main station end control chip 1 and when being positioned at different line terminal clamps from local side control chip 2, such as, the processor of line terminal clamp 4 controls main station end control chip 1, and the processor of line terminal clamp 5 controls from local side control chip 2, then the method enters step S55, the processor of the processor difference announcement trunk terminal clamp 4 of network terminal clamp 3 cuts out the optical module corresponding to main station end control chip 1, and the processor of announcement trunk terminal clamp 5 is opened from the optical module corresponding to local side control chip 2.
From the angle of optical network unit, after switching, all data flow path on optical line terminal are identical, and therefore upstream remains connection.
Fig. 6 show according to a specific embodiment of the present invention when second predetermined condition from the switching flow being switched to main station end control chip from local side control chip.
In a specific embodiment, such as fault is excluded, and the link-recovery corresponding to main station end control chip 1 is normal, and therefore, keeper manually can send the instruction of the link switched back corresponding to main station end control chip 1.
Therefore, in a step 61, first whether network terminal clamp 3 judge main station end control chip 1 and be positioned at the clamp of same line terminal from local side control chip 2.
If main station end control chip 1 and be positioned at the clamp of same line terminal from local side control chip 2, such as, be all positioned on line terminal clamp 4, then network terminal clamp 3 sends the instruction switching back main station end control chip 1 to line terminal clamp 4.
Then, the CPU 4 of line terminal clamp controls to open the optical module corresponding to main station end control chip 1 respectively, also be, the light path controlled corresponding to main station end control chip 1 is luminous, and close from the optical module corresponding to local side control chip 2, also namely, cut off from the light path corresponding to local side control chip 2.
If main station end control chip 1 and lay respectively at different line terminal clamps from local side control chip 2, such as, main station end control chip 1 is positioned on line terminal clamp 4, and be positioned at line terminal clamp 5 from local side control chip 2, then in step S63, network terminal clamp 3 sends respectively to line terminal clamp 4 and line terminal clamp 5 instruction switching back main station end control chip 1.Also namely, the optical module corresponding to main station end control chip 1 opened by the processor of announcement trunk terminal clamp 4, and the processor of announcement trunk terminal clamp 5 cuts out from the optical module corresponding to local side control chip 2.
In addition, in step S64, alarm removed by the processor of line terminal clamp 4.
Below, with reference to Fig. 6, from the angle of device block diagram, present invention is described.Wherein, device 10 is arranged in the network equipment of EPON, and this network equipment can be positioned on network terminal clamp, also can be positioned on the clamp of line terminal.Device 10 is for controlling at the main station end control chip 1 of passive optical network optical line terminal and carry out link protection between local side control chip 2.This EPON comprises optical line terminal and at least one optical network unit.
Device 10 comprises: synchronizer 100, judgment means 101 and processing unit 102.
Wherein, synchronizer 100 is for synchronous main station end control chip 1 and the control information from local side control chip 2.
This control information comprises any one in the following or appoints multinomial:
The static configuration information of-described main station end control chip;
The registration parameter of the optical network unit that-described main station end control chip controls;
The Medium Access Layer learning table that-described main station end control chip exchanges;
The dynamic protocol information that-described main station end control chip exchanges
Judgment means 101 is for judging whether first predetermined condition.
This first predetermined condition comprises handover triggering condition or comprises handover triggering condition generation and continue Preset Time, and wherein, this handover triggering condition comprises any one in the following:
The link signal of-EPON is lost;
The input optical signal power of-EPON is higher than the first predetermined threshold or lower than the second predetermined threshold;
The bit error rate of-EPON is more than the 3rd predetermined threshold;
Optical module fault corresponding to-main station end control chip;
-main station end control chip fault.
The line terminal clamp fault at-main station end control chip place;
-from unlatching main station end control chip, do not receive any registration request from optical network unit yet more than the first scheduled time main station end control chip.
When meeting described first predetermined condition, processing unit 102 cuts out the optical module corresponding to described main station end control chip and opens described from the optical module corresponding to local side control chip.
Alternatively, judgment means 101 is also for judging whether second predetermined condition.Wherein, the second predetermined condition comprises any one in the following:
-described from local side control chip from unlatching, do not receive any registration request from described optical network unit more than described in second scheduled time from local side control chip;
-receive the instruction switching to described main station end control chip of network manager.
When second predetermined condition, processing unit 102 is also for cutting out from the optical module corresponding to local side control chip 2 and the optical module opened corresponding to main station end control chip 1.
In addition, device 10 also comprises acquisition device (not shown) for obtaining the distance between main station end control chip 1 and at least one optical network unit and the difference from the distance between local side control chip 2 and at least one optical network unit;
Dispensing device (not shown), for according to this difference, is defined as the time resource that at least one optical network unit sends data, and according to this time resource determined, at least one optical network unit described sends data.
Preferably, in order to compensate the difference switching to the Loop Round Trip Time produced from local side control chip, this device 10 also comprises:
Generating apparatus (not shown), for for main station end control chip 1 with from local side control chip 2 link generation aggregation group, wherein, main station end control chip 1 and have the index of same aggregated links group from local side control chip 2, this index is used for carrying out Medium Access Layer address learning.
Be described embodiments of the invention above, but the present invention is not limited to specific system, equipment and concrete agreement, those skilled in that art can make various distortion or amendment within the scope of the appended claims.
The those skilled in the art of those the art can pass through research specification, disclosed content and accompanying drawing and appending claims, understand and implement other changes to the execution mode disclosed.In the claims, word " comprises " element and step of not getting rid of other, and wording " one " does not get rid of plural number.In the practical application of invention, the function of the multiple technical characteristics quoted during a part possibility enforcement of rights requires.Any Reference numeral in claim should not be construed as the restriction to scope.
Claims (15)
1. one kind controls at the main station end control chip of described passive optical network optical line terminal with from the method for carrying out link protection between local side control chip in the network equipment of EPON; wherein; described EPON comprises described optical line terminal and at least one optical network unit, and the method comprises the following steps:
-synchronous described main station end control chip and the described control information from local side control chip;
Described method also comprises:
A. first predetermined condition is judged whether;
B., when meeting described first predetermined condition, closing the optical module corresponding to described main station end control chip and opening described from the optical module corresponding to local side control chip.
2. method according to claim 1, wherein, described step b also comprises:
-when meeting described first predetermined condition, the described optical module of closing corresponding to described main station end control chip is also opened described from the described optical module corresponding to local side control chip to utilize universal input to export; And/or
-when described main station end control chip and described be positioned at same line terminal clamp from local side control chip time, the described network equipment comprises the processor of described line terminal clamp; Or
-when described main station end control chip and described be positioned at different line terminal clamps from local side control chip time, the described network equipment comprises the processor of the network terminal clamp at clamp place, described line terminal.
3. method according to claim 1 and 2, wherein, also comprises after described step b:
-judge whether second predetermined condition;
-when meeting described second predetermined condition, close described from the described optical module corresponding to local side control chip and the described optical module opened corresponding to described main station end control chip.
4. method according to claim 1 and 2, wherein, also comprises before described step b:
-obtain distance between described main station end control chip and at least one optical network unit described and the described difference from the distance between local side control chip and at least one optical network unit described;
Also comprise after described step b:
-according to described difference, be defined as the time resource that at least one optical network unit described sends data, and according to described time resource, at least one optical network unit described sends data.
5. method according to claim 1 and 2, wherein, described method also comprises:
-be described main station end control chip and described from local side control chip link generation aggregation group, wherein, described main station end control chip and the described index from local side control chip with same aggregated links group, described index is used for carrying out Medium Access Layer address learning.
6. method according to claim 1 and 2, wherein, further comprising the steps of after described step b:
-send alarm information to network manager.
7. method according to claim 1 and 2, wherein, described first predetermined condition comprises handover triggering condition or comprises the generation of described handover triggering condition and continue Preset Time, and wherein, described handover triggering condition comprises any one in the following:
The link signal of-described EPON is lost;
The input optical signal power of-described EPON is higher than the first predetermined threshold or lower than the second predetermined threshold;
The bit error rate of-described EPON is more than the 3rd predetermined threshold;
Optical module fault corresponding to-described main station end control chip;
-described main station end control chip fault;
The line terminal clamp fault at-described main station end control chip place;
-from the described main station end control chip of unlatching, do not receive any registration request from described optical network unit yet more than main station end control chip described in first scheduled time.
8. method according to claim 3, wherein, described second predetermined condition comprises any one in the following:
-described from local side control chip from unlatching, do not receive any registration request from described optical network unit more than described in second scheduled time from local side control chip;
-receive the instruction switching to described main station end control chip of network manager.
9. method according to claim 1 and 2, wherein, described control information comprises any one in the following or appoints multinomial:
The static configuration information of-described main station end control chip;
The registration parameter of the optical network unit that-described main station end control chip controls;
The Medium Access Layer learning table that-described main station end control chip exchanges;
The dynamic protocol information that-described main station end control chip exchanges.
10. one kind controls at the main station end control chip of described passive optical network optical line terminal with from the device carrying out link protection between local side control chip in the network equipment of EPON; wherein; described EPON comprises described optical line terminal and at least one optical network unit, and this device comprises:
Synchronizer, for synchronous described main station end control chip and the described control information from local side control chip;
Described device also comprises:
Judgment means, for judging whether first predetermined condition;
Processing unit, when meeting described first predetermined condition, cutting out the optical module corresponding to described main station end control chip and opening described from the optical module corresponding to local side control chip.
11. devices according to claim 10, wherein, described judgment means also for:
-judge whether second predetermined condition;
Described processing unit also for, when meeting described second predetermined condition, close described from the described optical module corresponding to local side control chip and the described optical module opened corresponding to described main station end control chip.
12. according to the device described in claim 10 or 11, wherein, also comprises:
Acquisition device, for obtaining distance between described main station end control chip and at least one optical network unit described and the described difference from the distance between local side control chip and at least one optical network unit described;
Dispensing device, for according to described difference, is defined as the time resource that at least one optical network unit described sends data, and according to described time resource, at least one optical network unit described sends data.
13. devices according to claim 10 or 11, wherein, also comprise:
Generating apparatus, for being described main station end control chip and described from local side control chip link generation aggregation group, wherein, described main station end control chip and the described index from local side control chip with same aggregated links group, described index is used for carrying out Medium Access Layer address learning.
14. devices according to claim 10 or 11, wherein, described first predetermined condition comprises handover triggering condition or comprises described handover triggering condition and occurs and continue Preset Time, and wherein, described handover triggering condition comprises any one in the following:
The link signal of-described EPON is lost;
The input optical signal power of-described EPON is higher than the first predetermined threshold or lower than the second predetermined threshold;
The bit error rate of-described EPON is more than the 3rd predetermined threshold;
Optical module fault corresponding to-described main station end control chip;
-described main station end control chip fault;
The line terminal clamp fault at-described main station end control chip place;
-from the described main station end control chip of unlatching, do not receive any registration request from described optical network unit yet more than main station end control chip described in first scheduled time; And/or
Described control information comprises any one in the following or appoints multinomial:
The static configuration information of-described main station end control chip;
The registration parameter of the optical network unit that-described main station end control chip controls;
The Medium Access Layer learning table that-described main station end control chip exchanges;
The dynamic protocol information that-described main station end control chip exchanges.
15. devices according to claim 10 or 11, wherein, described second predetermined condition comprises any one in the following:
-described from local side control chip from unlatching, do not receive any registration request from described optical network unit more than described in second scheduled time from local side control chip;
-receive the instruction switching to described main station end control chip of network manager.
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| CN107222255B (en) * | 2016-03-21 | 2019-10-18 | 深圳市中兴微电子技术有限公司 | A kind of control method and device |
| CN107295624B (en) * | 2016-03-30 | 2021-11-26 | 日本电气株式会社 | Node synchronization method and node adopting same |
| CN109039680B (en) * | 2017-06-08 | 2021-06-01 | 华为技术有限公司 | Method and system for switching main Broadband Network Gateway (BNG) and standby BNG and BNG |
| CN111131532B (en) * | 2019-11-27 | 2022-08-16 | 深圳震有科技股份有限公司 | Method and system for automatically changing MAC address, computer equipment and medium |
| CN111343107B (en) * | 2020-01-22 | 2022-03-04 | 苏州盛科通信股份有限公司 | Information processing method, Ethernet switching chip and storage medium |
| CN111277518B (en) * | 2020-01-22 | 2022-04-01 | 苏州盛科通信股份有限公司 | Information processing method, Ethernet switching chip and storage medium |
| CN113365033A (en) * | 2021-06-04 | 2021-09-07 | 深圳市朗强科技有限公司 | Standby optical module selection method and equipment supporting audio and video data transmission |
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| CN100539475C (en) * | 2007-01-11 | 2009-09-09 | 烽火通信科技股份有限公司 | A kind of devices and methods therefor of in EPON, fibre circuit being protected |
| CN101651912B (en) * | 2008-08-13 | 2013-03-27 | 华为技术有限公司 | Data transmission method, device and system used in optical access network |
| 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 |
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| CN101877612B (en) * | 2010-06-30 | 2014-12-31 | 中兴通讯股份有限公司 | System for protecting optical link of passive optical network, device thereof and method thereof |
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