CN103378918B

CN103378918B - Channel method of adjustment and device

Info

Publication number: CN103378918B
Application number: CN201210116210.8A
Authority: CN
Inventors: 耿丹; 张伟良; 郭勇; 李长垒; 苏婕; 贝劲松; 曾冠军; 高扬
Original assignee: ZTE Corp
Current assignee: ZTE Corp
Priority date: 2012-04-19
Filing date: 2012-04-19
Publication date: 2019-08-06
Anticipated expiration: 2032-04-19
Also published as: CN103378918A; CN107645354A

Abstract

The invention discloses channel method of adjustment and device, one of channel method of adjustment includes: that spare OLT knows that the corresponding active channel of the first primary OLT breaks down；Itself corresponding physical channel is adjusted to the corresponding physical channel the first primary OLT by spare OLT.It is able to solve the time for extending switching in the related technology using the present invention, influences the fast quick-recovery normal communication of ONU and OLT, is not able to satisfy requirement and equipment cost higher problem of the user to the fast quick-recovery of network failure.

Description

Channel method of adjustment and device

Technical field

The present invention relates to the communications fields, in particular to three kinds of channel methods of adjustment and device.

Background technique

With the development of network technology, it can use the business such as a large amount of voice of network transmission, data, video, therefore right The requirement of bandwidth is continuously improved, and passive optical network (PON) is exactly to generate under this demand.

The topological structure of PON system as shown in Figure 1, PON system usually by the optical line terminal (OLT) of office side, user side Optical network unit (ONU) and Optical Distribution Network (ODN, also referred to as optical splitter) composition, generally use point-to-multipoint network knot Structure.ODN is made of the Passive Optical Components such as single mode optical fiber and optical splitter, optical connector, the physical connection between OLT and ONU Light-transmitting medium is provided.Mainly have in PON technology at present time division multiplexing (Time Division Multiplexing, referred to as TDM) PON system, wavelength-division multiplex (Wavelength Division Multiplexing, referred to as WDM) PON system, orthogonal Frequency division multiplexing (Orthogonal Frequency Division Multiplexing, referred to as OFDM) PON system and mixing PON system, mixing in PON system includes Wave time division mixing PON system, frequency-division and time-division mixing PON system etc. and wavelength-division frequency division Time-division mixes PON system.

In time-multiplexed PON system, such as gigabit passive optical network (Gigabit-Capable Passive Optical Network, referred to as GPON) system, ethernet passive optical network (Ethernet Passive Optical Network, abbreviation EPON) system, 10 gigabit passive optical networks (10-Gigabit-capable passive optical Network, abbreviation XG-PON) in system and 10-Gigabit-capable EPON system, down direction (by OLT to ONU) Data transmission uses broadcast mode, and each ONU receives all frames respectively, identifies (ONU-ID), sensor network further according to ONU Interface identifier (GEM-Port ID), allocation identification (Allocation-ID), Logical link ID (Logical Link Identity, referred to as LLID) etc. information obtain one's own frame.The data of up direction (from ONU to OLT) are passed Defeated, since each ONU needs shared transmission medium, each ONU should be in OLT arranged to transmitting uplink in oneself time slot Data.

There are the optical transmitting set of multiple and different wavelength, the optical wavelength point of each optical transmitting set in WDM-PON system, at OLT Not Wei λ d1, λ d2 ..., λ dn, wherein λ d1 is the wavelength of OLT transmission downlink data use when communicate with first ONU, and λ d2 is The wavelength ... that downlink data uses is sent when OLT is communicated with second ONU, λ dn is under sending when OLT is communicated with n-th of ONU The wavelength that row data use；The generation wavelength of transmitter at each ONU is different from the transmitted wave of transmitter at other ONU It is long, such as it is λ u1 that first ONU, which is used to send the launch wavelength of the transmitter of upstream data to OLT, second ONU is for giving The launch wavelength that OLT sends the transmitter of upstream data is λ u2 ..., and n-th of ONU is used to send the transmitting of upstream data to OLT The launch wavelength of device is λ un, and using above-mentioned technology, OLT can send downlink data to all ONU simultaneously, and each ONU can also be with Upstream data is sent simultaneously, i.e. OLT and ONU are the structure using point-to-point on optical channel.

There is multiple and different subcarriers in OFDM-PON system, at OLT, each subcarrier is respectively C 1, C 2 ..., C N, and each subcarrier be it is orthogonal, OLT will be sent on the modulate downstream data to first group of subcarrier of first ONU (every The quantity of group subcarrier can be same or different), OLT is sub to second group by the modulate downstream data for being sent to second ONU On carrier wave ..., OLT will be sent on the modulate downstream data to n-th group subcarrier of n-th of ONU, is sent under different ONU There is no intersection between subcarrier group used by row data, i.e., different ONU uses different subcarrier groups, and ONU is sent to OLT The subcarrier that uses of upstream data be that OLT distributes to ONU, at ONU for sent the subcarrier of upstream data to OLT with OLT uses the subcarrier for sending downlink data to current ONU identical, can also be different.Using above-mentioned technology, OLT can be simultaneously Downlink data is sent to all ONU, each ONU can also send upstream data simultaneously, i.e. OLT and ONU are to adopt on optical channel With the structure of point-to-point.

Wave time division mixes PON system and the topological structure of frequency-division and time-division mixing PON system is as shown in Figure 2 a and 2 b.? In Fig. 2 a and Fig. 2 b, each OLT manages one group of ONU, and one group of ONU in Wave time division mixing PON system is for sending uplink The upstream wavelength of data is identical, and the downstream wavelength for receiving downlink data is also identical；Frequency-division and time-division mixes one in PON system The subcarrier group that group ONU is used to send upstream data is identical, and the subcarrier group for receiving downlink data is also identical, one group of ONU In different ONU upstream data is transmitted by time-multiplexed mode.The downstream wavelength (subcarrier group) of different OLT is different, no The upstream wavelength (subcarrier group) used with every group of ONU of OLT management is also different.Each ONU is according to the order of OLT specific Upstream data is sent in ascending time slot.

In the application deployment of passive optical network, there are certain customers to need higher safety, it is desirable to which operator can mention Ensure that its service channel does not interrupt or the requirement of secondary level-one is for a kind of security mechanism, it can be after service channel interruption Fast quick-recovery.This just proposes protection access to the passive optical network of carrying customer service operation and is switched fast wanting for access It asks.

Fig. 3 and Fig. 4 respectively illustrates in existing passive optical network standards two kinds of typical network architecture diagrams under protected mode.

What Fig. 3 was indicated is the mode of the protection trunk optical fiber of type B.Two optical port PON (0) of OLT and PON (1) connect It is connected to the optical splitter of a 2:N, this optical splitter down direction passes through optical fiber respectively and is connected to each ONU.The optical port PON (0) of OLT passes through The access that optical splitter reaches ONU is primary access, and the optical port PON (1) of OLT is spare logical by the access that optical splitter reaches ONU Road.After primary access is interrupted as the traffic path of optical network unit and optical line terminal, stand-by channel will be enabled and keep light net Communication between network unit and optical line terminal.

What Fig. 4 was indicated is the all-fiber protection mode of Type C.The optical port PON (0) of OLT is connected to the optical splitter 1 of 1:N, The optical port PON (1) of OLT is connected to the optical splitter 2 of 1:N, the two optical splitters pass through optical fiber respectively and connect with each ONU.The light of OLT Mouth PON (0) is primary access by the access that optical splitter 1 reaches ONU, and the optical port PON (1) of OLT passes through the arrival of optical splitter 2 ONU Access be stand-by channel.It is standby by enabling after primary access is interrupted as the traffic path of optical network unit and optical line terminal The communication between optical network unit and optical line terminal is kept with access.

Fig. 5 is listed when ONU carries out different operations respectively, triggers the ONU into various states.Specifically,

ONU is in original state (O1) when not carrying out any operation；

ONU receives downlink optical signal, when eliminating lock-out (LOS/LOF), into serial-number-state (O2, O3)；

ONU receives uplink overhead parameter or ONU receives ONU ID, into distance measuring states (O4)；

When ONU receives equilibrium time delay (Equalization Delay, referred to as EqD), into operating status (O5), thus It may be implemented to receive and transmit data；

If ONU detects access exception, LOS/LOF alarm is generated, then is transferred to dropout state (O6)；

When TO2 timer expiry, then ONU returns to original state (O1).

Under the existing protected mode of passive optical network, now in conjunction with Fig. 5, to enable stand-by channel after primary path fault Illustrate the logic state transition process of optical network unit for process:

For ONU and OLT by primary access, that is, PON LT (0) mouth pass communications between the two, ONU is in operating status (O5)；

After primary access interrupts, ONU can't detect the optical signal of OLT in primary access, after generating LOS/LOF alarm, into Enter pop-up state (O6), ONU be in pop-up state (O6) time be more than TO2 timer setting duration after, into initial shape State (O1)；

OLT enables stand-by channel, that is, PON LT (1) mouth access, sends downlink optical signal to ONU, ONU detects OLT's After downlink optical signal, eliminate the LOS/LOF alarm of OLT, by stand-by channel and OLT complete frame demarcation and it is synchronous after, ONU is from first Beginning state (O1) is transferred to serial-number-state (O2, O3), and ONU receives the uplink overhead parameter that OLT is sent；Uplink overhead parameter packet It includes: lead code bit type；Delimiter parameter (Delimiter) etc.；After OLT is switched to stand-by channel from primary access, need pair Its ID of ONU managed is redistributed, and the ID of each ONU after redistributing is sent to each ONU；ONU receives OLT hair After the ONU-ID information sent, it is transferred to distance measuring states (O4)；

After ONU receives the EqD message that OLT is sent, operating status (O5) is transferred to from distance measuring states (O4)；

So far, the stand-by channel between ONU and OLT is completely set up, and ONU and OLT pass through this stand-by channel progress information exchange.

In the above access handoff procedure, after physical layer access is established on stand-by channel, OLT need to send the related datas such as EqD It requires to update inherent parameters after receiving related data to all ONU, each ONU, normal operating conditions can be restored.With class It is illustrated for the network structure of type B, when the ONU that an OLT is managed shares 32, in handoff procedure, OLT needs and 32 A ONU interaction is simultaneously fully completed state transition process as shown in Figure 5 (i.e. experience O1, O2, O3, O4 and O5).Existing procedure is deposited The problem of include: that each ONU completes above-mentioned a series of state transition and makes OLT that need to bear the work of a large amount of messaging； The time of extension switching, the fast quick-recovery normal communication of ONU and OLT is influenced, so that ONU and OLT is restored to work normally time-consuming substantially and exist More than 100 milliseconds of magnitudes, it is not able to satisfy requirement of the user to the fast quick-recovery of network failure.And it is protected in the above process to realize There are one primary PON mouthfuls and PON mouthfuls spare at each OLT of function, i.e. the side the OLT protection that is 1:1 increases equipment cost.

For the time for extending switching in the related technology, the fast quick-recovery normal communication of ONU and OLT is influenced, use is not able to satisfy Requirement and equipment cost higher problem of the family to the fast quick-recovery of network failure, currently no effective solution has been proposed.

Summary of the invention

For the time for extending switching in the related technology, the fast quick-recovery normal communication of ONU and OLT is influenced, use is not able to satisfy Requirement and equipment cost higher problem of the family to the fast quick-recovery of network failure, the present invention provides one kind, at least to solve The above problem.

According to an aspect of the invention, there is provided a kind of channel method of adjustment, comprising: spare optical line terminal OLT obtains Know that the corresponding active channel of the first primary OLT breaks down；Itself corresponding physical channel is adjusted to described by the spare OLT The corresponding physical channel first primary OLT.

Preferably, the spare OLT knows that the corresponding active channel of the described first primary OLT breaks down, comprising: described The failure notification that spare OLT receives at least one primary OLT or network management system is sent knows that the described first primary OLT is corresponding Active channel break down；Or the spare OLT actively obtains the active channel state of each primary OLT, knows described The corresponding active channel of one primary OLT breaks down.

Preferably, the spare OLT actively obtains the active channel state of each primary OLT, knows the described first primary OLT Corresponding active channel breaks down, comprising: information exchange is not present between the spare OLT and each optical network unit ONU When, itself corresponding physical channel is adjusted to the corresponding physical channel the described first primary OLT by the spare OLT, if referring to In fixing time, the physical channel after the spare OLT is adjusted does not receive upstream data, then knows the described first primary OLT Corresponding active channel breaks down；Either the spare OLT is led to the described first primary OLT or the network management system Letter knows that the corresponding active channel of the described first primary OLT breaks down.

Preferably, itself corresponding physical channel is adjusted to the corresponding physics of the described first primary OLT by the spare OLT After channel, further includes: spare OLT ONU connection corresponding with the described first primary OLT is established and the spare OLT pair The active channel answered；The spare OLT is corresponding by the described first primary OLT by the business of the corresponding ONU of the described first primary OLT Active channel switch active channel corresponding to the spare OLT.

Preferably, before the spare OLT knows that the corresponding active channel of the first primary OLT breaks down, comprising: described Spare OLT receives the status information that each primary OLT is sent, wherein the status information includes each primary OLT self-management The channel relevant information and distance measurement result information of ONU；The spare OLT stores the status information.

Preferably, the channel relevant information includes at least one following: mark ONU-ID, the logic chain road sign of each ONU Remember LLID, transmission container T-CONT, sequence number information, Media access contorl address and gigabit packaging method port-mark；Institute Stating distance measurement result information includes: the distance measurement value between the spare OLT and each ONU.

Preferably, when the corresponding each ONU of the spare OLT is stored with the distance measurement value, corresponding each ONU receives institute The downlink frame of spare OLT transmission is stated, the corresponding distance measurement value of data itself will be sent immediately and is updated to the distance measurement value stored；Or institute The order that corresponding each ONU receives the update distance measurement value that the spare OLT is sent is stated, itself will send the corresponding survey of data immediately The distance measurement value of storage is updated to away from value；Or corresponding each ONU does not receive downlink frame within a preset time, then actively will Itself send the distance measurement value that the corresponding distance measurement value of data is updated to storage.

Preferably, the distance measurement value is following one of any: loop time delay value, balanced time delay value and loop time.

Preferably, the physical channel is following one of any: wavelength, wavelength are to, subcarrier and subcarrier group.

According to another aspect of the present invention, another channel method of adjustment is provided, comprising: the second primary optical link Terminal OLT knows that the corresponding active channel of the first primary OLT breaks down；The second primary OLT itself increases a physics Channel, and increased physical channel is adjusted to the corresponding physical channel the described first primary OLT.

Preferably, the described second primary OLT knows that the corresponding active channel of the first primary OLT breaks down, comprising: described The failure notification that second primary OLT receives at least one primary OLT or network management system is sent, knows the described first primary OLT Corresponding active channel breaks down；Or the second primary OLT actively obtains the active channel shape of remaining each primary OLT State knows that the corresponding active channel of the described first primary OLT breaks down.

Preferably, the described second primary OLT actively obtains the active channel state of remaining each primary OLT, knows described The corresponding active channel of one primary OLT breaks down, comprising: the primary OLT management of the second primary OLT and described first it is each When information exchange being not present between optical network unit ONU, the physical channel that itself is increased newly is adjusted to by the second primary OLT The corresponding physical channel the first primary OLT, if within a specified time, the physics that the second primary OLT is increased newly through itself Channel does not receive upstream data, then knows that the corresponding active channel of the described first primary OLT breaks down；Or described second Primary OLT is communicated with the described first primary OLT or the network management system, knows the corresponding work of the described first primary OLT It breaks down as access.

Preferably, before the described second primary OLT knows that the corresponding active channel of the first primary OLT breaks down, comprising: The second primary OLT receives the status information that remaining each primary OLT is sent, wherein the status information includes remaining each master With the channel relevant information and distance measurement result information of the ONU of OLT self-management；The second primary OLT stores the state letter Breath；Wherein, the channel relevant information includes at least one following: the mark ONU-ID of each ONU, logical links label L LID, Transmit container T-CONT, sequence number information, Media access contorl address and gigabit packaging method port-mark；The ranging knot Fruit information includes: the distance measurement value between the described second primary OLT and each ONU.

Preferably, when the corresponding each ONU of the described second primary OLT stores the distance measurement value, corresponding each ONU is connect The downlink frame that the described second primary OLT is sent is received, the corresponding distance measurement value of data itself will be sent immediately and is updated to the ranging stored Value；Or corresponding each ONU receives the order for the update distance measurement value that the described second primary OLT is sent, and immediately sends out itself The distance measurement value for sending the corresponding distance measurement value of data to be updated to storage；Or corresponding each ONU is not received within a preset time Downlink frame then itself will actively send the corresponding distance measurement value of data and be updated to the distance measurement value stored.

According to another aspect of the present invention, another channel method of adjustment is provided, comprising: optical network unit ONU Whether judgement receives downlink data within a preset time；If judging result is no, the ONU actively leads to the physics of itself Road is adjusted to the non-specified physical channel broken down.

Preferably, the specified physical channel includes: spare optical line terminal OLT transmission and receives the physics that data use Channel；Or first other transmission for using of primary OLT and receive the physical channels of data, wherein the first primary OLT is The corresponding primary OLT of the ONU；Or other primary OLT in passive optical network PON system are used or newly-increased physics is logical Road, wherein other described primary OLT are different primary OLT from the described first primary OLT.

Preferably, the physical channel of itself is adjusted to the non-specified physical channel broken down by the ONU, comprising: when Spare OLT by self transmission with receive after the physical channel that uses of data is adjusted to the corresponding physical channel the ONU, it is described ONU receives the adjustment notice that the spare OLT is sent, and the physical channel of itself is adjusted to the spare OLT and transmits and receives The physical channel or the ONU that data use receive the adjustment notice that the spare OLT is sent, by the physical channel of itself The physical channel or the ONU for being adjusted to other transmission and reception data that the described first primary OLT is used receive described standby The physical channel of itself is adjusted to the physics that other described primary OLT are used or increased newly and led to by the adjustment notice sent with OLT Road；To be adjusted to the ONU corresponding with the physical channel for receiving data for other transmission that the first primary OLT uses itself After physical channel, the ONU receives the adjustment notice that the described first primary OLT is sent, and the physical channel of itself is adjusted to It is primary that the physical channel of other transmission and reception data that the first primary OLT is used or the ONU receive described first The physical channel of itself is adjusted to the physics that the spare OLT is transmitted and reception data use and led to by the adjustment notice that OLT is sent Road or the ONU receive the adjustment notice that the described first primary OLT is sent, by the physical channel of itself be adjusted to it is described its He uses primary OLT or newly-increased physical channel；The physical channel for using or increasing newly is adjusted to described by other described primary OLT After the corresponding physical channel ONU, the ONU receives the adjustment notice that other described primary OLT are initiated, and the physics of itself is led to Road is adjusted to other described primary OLT uses or newly-increased physical channel or the ONU receives other described primary OLT and sends out The physical channel of itself is adjusted to the spare OLT and transmits and receive the physical channel that data use by the adjustment notice risen, or ONU described in person receives the adjustment notice that other described primary OLT are initiated, and it is primary that the physical channel of itself is adjusted to described first The physical channel of other transmission and reception data that OLT is used.

Preferably, after the physical channel of itself is adjusted to the specified physical channel that do not break down by the ONU, packet Include: the ONU is updated to correspond to the distance measurement value of the specified physical channel by the distance measurement value that data use is sent；The ONU will The distance measurement value that uses of data is sent to be updated to before the distance measurement value for corresponding to the specified physical channel, comprising: the ONU again into Row ranging obtains updated distance measurement value；Alternatively, the ranging that the ONU receives each primary OLT or the spare OLT is sent Value, as the distance measurement value of the active channel of the corresponding OLT for sending distance measurement value.

According to another aspect of the present invention, a kind of passage adjustment device is provided, spare optical line terminal OLT is set to In, comprising: first knows module, for knowing that the corresponding active channel of the first primary OLT breaks down；The first adjustment module, For itself corresponding physical channel to be adjusted to the corresponding physical channel the described first primary OLT.

According to another aspect of the present invention, it provides another passage adjustment device, is set to and does not break down In second primary OLT, comprising: second knows module, for knowing that the corresponding active channel of the first primary OLT breaks down；The Two adjustment modules, for increasing a physical channel in the described second primary OLT, and are adjusted to institute for increased physical channel State the corresponding physical channel the first primary OLT.

According to another aspect of the present invention, another passage adjustment device is provided, optical network unit ONU is set to In, comprising: judgment module, for judging whether receive downlink data within a preset time；Third adjusts module, if for described When the judging result of judgment module is no, then actively the specified physics that the physical channel of itself is adjusted to not break down is led to Road.

In embodiments of the present invention, there is the spare OLT spare exclusively for primary OLT, as any one primary OLT ( One primary OLT) when breaking down, it is corresponding that itself corresponding physical channel is directly adjusted to the first primary OLT by spare OLT Physical channel.It can be seen that in this example, the type of physical channel is directly had adjusted, and for the side ONU, the object of ONU connection The type in channel is managed there is no changing, therefore, ONU does not need to do large variation, haves no need to change oneself state yet, it is only necessary to after Continued access continues the physical channel.In the side OLT, the physical channel of oneself can be with flexibility to break down by spare OLT The corresponding physical channel primary OLT, do not need for each OLT be arranged a spare OLT, that is, do not need 1 in the side OLT: Equipment cost is saved in 1 protection.

Detailed description of the invention

The drawings described herein are used to provide a further understanding of the present invention, constitutes part of this application, this hair Bright illustrative embodiments and their description are used to explain the present invention, and are not constituted improper limitations of the present invention.In the accompanying drawings:

Fig. 1 is the topological structure schematic diagram according to the PDN system of the relevant technologies；

Fig. 2 a is the topological structure schematic diagram that PON system is mixed according to the Wave time division of the relevant technologies；

Fig. 2 b is the topological structure schematic diagram that PON system is mixed according to the frequency-division and time-division of the relevant technologies；

Fig. 3 is the network architecture diagram according to the mode of the protection trunk optical fiber of the type B of the relevant technologies；

Fig. 4 is the network architecture diagram according to the all-fiber protection mode of the Type C of the relevant technologies；

Fig. 5 is the topological diagram according to the mixing PON comprising spare OLT of the relevant technologies；

Fig. 6 is the process flow diagram of the first channel method of adjustment according to an embodiment of the present invention；

Fig. 7 is the structural schematic diagram of the first passage adjustment device according to an embodiment of the present invention；

Fig. 8 is the process flow diagram of second of channel according to an embodiment of the present invention method of adjustment；

Fig. 9 is the structural schematic diagram of second of passage adjustment device according to an embodiment of the present invention；

Figure 10 is the process flow diagram of the third channel method of adjustment according to an embodiment of the present invention；And

Figure 11 is the structural schematic diagram of the third passage adjustment device according to an embodiment of the present invention.

Specific embodiment

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings and in combination with Examples.It should be noted that not conflicting In the case of, the features in the embodiments and the embodiments of the present application can be combined with each other.

Refer in the related technology, existing procedure there are the problem of include: each ONU complete it is as shown in Figure 5 a series of State transition make OLT that need to bear the work of a large amount of messaging, this results in the extension of the time of switching, influences ONU and OLT Fast quick-recovery normal communication makes ONU and OLT restore to work normally basic time-consuming more than 100 milliseconds of magnitudes, is not able to satisfy user Requirement to the fast quick-recovery of network failure.And to realize, there are a primary PON at each OLT of defencive function in the above process Mouthful and it is PON mouthfuls spare, i.e. the side the OLT protection that is 1:1 increases equipment cost.

In order to solve the above technical problems, the embodiment of the invention provides a variety of channel methods of adjustment, for realizing lower Equipment cost on the basis of realize the adjustment of quick channel, and then realize during subsequent channel application and be quickly responsible to replace Switch, save switching time so that between ONU and OLT can fast quick-recovery normal communication, it is quickly extensive to network failure to meet user Multiple requirement.Now successively a variety of channel methods of adjustment are illustrated.

The process flow diagram of the first channel method of adjustment provided in an embodiment of the present invention refers to Fig. 6, detailed process Including step S602 to step S604:

Step S602, spare OLT knows that the corresponding active channel of the first primary OLT breaks down；

Step S604, itself corresponding physical channel is adjusted to the corresponding physical channel the first primary OLT by spare OLT.

In embodiments of the present invention, there is the spare OLT spare exclusively for primary OLT, as any one primary OLT ( One primary OLT) when breaking down, itself corresponding physical channel is directly adjusted to the corresponding physics of the primary OLT by spare OLT Channel.It can be seen that in this example, directly having adjusted the type of physical channel, for the side ONU, the physics that ONU is used is logical There is no changing, therefore, ONU does not need to do large variation the type in road, haves no need to change oneself state, it is only necessary to after continued access yet Continue the physical channel.In the side OLT, the physical channel of oneself with flexibility can be adjusted to break down by spare OLT The corresponding physical channel primary OLT, do not need for each OLT be arranged a spare OLT, that is, do not need 1 in the side OLT: Equipment cost is saved in 1 protection.

The primary OLT of first herein is used only for the primary OLT for specifying a certain specific, active channel to break down, right OLT itself does not generate restriction.

In process shown in Fig. 6, step S602 refers to that spare OLT can know the corresponding active channel hair of the first primary OLT Raw failure, it is contemplated that the difference for knowing mode can be generally divided into two kinds, and one is actively knowing, another is passively to obtain Know.The mode passively known usually is led to by the failure that spare OLT receives at least one primary OLT or network management system transmission Know, to know that the corresponding active channel of the first primary OLT breaks down.And the mode actively known is usually by spare OLT The active channel state for actively obtaining each primary OLT knows that the corresponding active channel of the first primary OLT breaks down.

When being known using active mode, spare OLT can be communicated actively with other network elements or network management system and be obtained Know, specifically, spare OLT is communicated with the first primary OLT or network management system, knows the corresponding work of the first primary OLT Access breaks down.Another mode actively known can be directly measurement and know, specifically, spare OLT and each light net When information exchange being not present between network unit ONU, the physical channel of oneself is sequentially adjusted in as each primary OLT by spare OLT Corresponding physical channel receives upstream data, if spare OLT on the corresponding physical channel some primary OLT within a specified time Upstream data is not received, then spare OLT knows that the corresponding active channel of the primary OLT breaks down, for example, spare OLT will Itself corresponding physical channel is adjusted to the corresponding physical channel the first primary OLT, if within a specified time, spare OLT is through adjusting Physical channel after whole does not receive upstream data, then knows that the corresponding active channel of the first primary OLT breaks down.

When implementation, primary OLT, which breaks down corresponding physical channel, generally includes following reason: the receipts of the first primary OLT Hair device breaks down；Alternatively, the optical fiber connected between the first primary OLT corresponding ONU breaks down.

In above preferred embodiment, for ensure PON system can work normally, spare OLT can use poll system according to The secondary corresponding physical channel each primary OLT in PON system carries out fault inquiry, finds that the first primary OLT is corresponding in time It breaks down physical channel.Or, it is preferred that spare OLT can also use periodic queries mode, inquire each primary OLT pairs Whether break down the physical channel answered.Alternatively, another preferred mode, is inquired each primary using timing inquiry mode Whether OLT breaks down corresponding physical channel.It is, of course, also possible to can guarantee to find in time using other inquiry modes First primary OLT breaks down corresponding physical channel, in order to provide alternate channel.

Process as shown in Figure 6, step S604 is after implementation, i.e., itself corresponding physical channel is adjusted to by spare OLT After the corresponding physical channel first primary OLT, spare OLT ONU connection corresponding with the first primary OLT is established and spare OLT Corresponding active channel, so spare OLT by the business of the corresponding ONU of the first primary OLT by the corresponding work of the first primary OLT CS channel switching is to the corresponding active channel of spare OLT.That is, spare OLT is first primary OLT pairs on its corresponding active channel The ONU distribution upstream bandwidth answered, wherein each ONU for being assigned upstream bandwidth is sent in the upstream bandwidth that spare OLT is distributed Row data.Restore business between ONU and spare OLT.

Process as shown in Figure 6, step S602 is before implementation, i.e., spare OLT knows that the corresponding work of the first primary OLT is logical Before road is broken down, spare OLT can receive the status information that each primary OLT is sent and be stored locally, wherein state Information includes the channel relevant information and distance measurement result information of the ONU of each primary OLT self-management；

Preferably, channel relevant information usually may include at least one following: ONU-ID, LLID, T- of each ONU CONT, sequence number information, Media access contorl address and gigabit packaging method port-mark.

Preferably, distance measurement result information includes: the distance measurement value between spare OLT and each ONU.

When implementing, distance measurement value can be usually calculated as follows, is now successively described.

First way: itself corresponding physical channel is adjusted to the corresponding physical channel each primary OLT by spare OLT Afterwards, start to receive upstream data, and record the time for receiving upstream data；

The time announcement for receiving upstream data to each primary OLT, is calculated spare OLT by each primary OLT by spare OLT With the distance measurement value between each ONU.

The second way: spare OLT obtains the time that each primary OLT sends downlink data；

After itself corresponding physical channel is adjusted to the corresponding physical channel each primary OLT by spare OLT, start in reception Row data, and record the time for receiving upstream data；

Spare OLT calculates itself distance measurement value between each ONU according to the time of acquisition and the time of record.

Second of distance measuring method in implementation process, spare OLT need to obtain each primary OLT send downlink data when Between, specific acquisition modes are as follows: spare OLT receives the time that sent by each primary OLT, each primary OLT sends downlink data； Alternatively, spare OLT monitors the time that each primary OLT sends downlink data.

Distance measurement value is being obtained using first way, i.e., is calculating the survey between spare OLT and each ONU by each primary OLT After value, spare OLT receives and stores each calculated distance measurement value of primary OLT；Alternatively, spare OLT and corresponding each ONU connect Each calculated distance measurement value of primary OLT is received, each primary calculated distance measurement value of OLT is stored by corresponding each ONU；

Distance measurement value is being obtained using the second way, i.e. spare OLT calculates itself according to the time for obtaining and recording After distance measurement value between each ONU, spare OLT notifies calculated distance measurement value to each primary OLT, and passes through each primary OLT It notifies corresponding each ONU, the calculated distance measurement value of spare OLT is stored by corresponding each ONU.

When implementation, when storing calculated distance measurement value by corresponding each ONU, currently used distance measurement value can be using such as Under several different update modes:

The first: corresponding each ONU receives the downlink frame that spare OLT is sent, itself will send the corresponding survey of data immediately The distance measurement value of storage is updated to away from value；

Second: corresponding each ONU receives the order for the update distance measurement value that spare OLT is sent, itself is sent number immediately The distance measurement value of storage is updated to according to corresponding distance measurement value；

The third: corresponding each ONU does not receive downlink frame within a preset time, then itself will actively send data and correspond to Distance measurement value be updated to storage distance measurement value.

Corresponding each ONU itself will send the corresponding distance measurement value of data and be updated to after the distance measurement value stored, corresponding each ONU responds the upstream bandwidth of spare OLT distribution, sends line number in the upstream bandwidth of distribution according to updated distance measurement value According to.

In above-mentioned preferred embodiment, distance measurement value can be set to following one of any: loop time delay value, balanced time delay Value and loop time；Physical channel can be set to following one of any: wavelength, wavelength are to, subcarrier and subcarrier group.It is each The specific choice of parameter as the case may be depending on.

To implement above preferred embodiment, based on the same inventive concept, the embodiment of the invention also provides a kind of channel tune Engagement positions are set in spare OLT, structural schematic diagram as shown in fig. 7, comprises:

First knows module 701, for knowing that the corresponding active channel of the first primary OLT breaks down；

The first adjustment module 702 is led to for itself corresponding physical channel to be adjusted to the corresponding physics of the first primary OLT Road.

Based on the same inventive concept, the embodiment of the invention also provides another channel method of adjustment, detailed processes Figure is as shown in figure 8, include step S802 to step S804:

Step S802, the second primary OLT knows that the corresponding active channel of the first primary OLT breaks down；

Step S804, the second primary OLT itself increases a physical channel, and increased physical channel is adjusted to first The corresponding physical channel primary OLT.

In embodiments of the present invention, and the spare OLT spare exclusively for primary OLT is not present, as any one primary OLT When (the first primary OLT) breaks down, by equally itself increasing a new physics as the second primary OLT of primary OLT Increased physical channel is adjusted to the corresponding physical channel the first primary OLT, is first using increased physical channel by channel Primary OLT provides active service.It can be seen that in this example, the type of the newly-increased physical channel the second primary OLT is had adjusted, For the side ONU, there is no changing, therefore, ONU does not need to do large variation, does not need to change yet for the physical channel that ONU is used Become oneself state, it is only necessary to continue to connect the physical channel.In the side OLT, can with flexibility select primary second OLT increases a physical channel, is adjusted to the corresponding physical channel primary OLT broken down, it is mutual to realize primary OLT For spare OLT, do not need that a spare OLT is arranged for each OLT, that is, do not need the protection of 1:1 in the side OLT, saving is set Standby cost.

The primary OLT of first herein is used only for the primary OLT for specifying a certain specific, active channel to break down, and Second primary OLT is used only for being distinguished with the first primary OLT, and the two does not generate restriction to OLT itself.

In above preferred embodiment, to ensure that PON system can work normally, the second primary OLT can use poll System successively carries out fault inquiry to the corresponding physical channel remaining primary OLT in PON system, finds the first primary OLT in time It breaks down corresponding physical channel.Or, it is preferred that the second primary OLT can also use periodic queries mode, inquire it Whether remaining each primary OLT breaks down corresponding physical channel.Alternatively, another preferred mode, uses timing issuer Formula inquires whether the corresponding physical channel remaining each primary OLT breaks down.It is, of course, also possible to using other inquiry modes, It can guarantee that the corresponding physical channel the primary OLT of discovery in time first is broken down, ensure PON just in order to provide alternate channel Often work.

Process as shown in Figure 8, step S802 refer to that the second primary OLT knows the corresponding work of the first primary OLT when implementing It breaking down as access, it is contemplated that the difference for knowing mode can be generally divided into two kinds, one is actively knowing, another It is passively to know.Passively know that mode includes: that the second primary OLT receives at least one primary OLT or network management system is sent Failure notification knows that the corresponding active channel of the first primary OLT breaks down；And actively knowing mode includes: the second primary OLT The active channel state for actively obtaining remaining each primary OLT knows that the corresponding active channel of the first primary OLT breaks down.

When being known using active mode, the second primary OLT can actively be communicated with other network elements or network management system into Row is known, specifically, the second primary OLT actively obtains the active channel state of remaining each primary OLT, knows the first primary OLT Corresponding active channel breaks down.Another mode actively known can be directly measurement and know, specifically, second is main When information exchange is not present between each optical network unit ONU with the primary OLT management of OLT and first, the second primary OLT will be certainly The newly-increased physical channel of body is adjusted to the corresponding physical channel the first primary OLT, if within a specified time, the second primary OLT warp Itself newly-increased physical channel does not receive upstream data, then knows that the corresponding active channel of the first primary OLT breaks down.

When implementation, the corresponding active channel of the first primary OLT, which breaks down, generally includes following reason: the first primary OLT Transceiver malfunctions；Alternatively, the optical fiber connected between the first primary OLT corresponding ONU breaks down.

Process as shown in Figure 8, after implementation, i.e., increased physical channel is adjusted to step S804 by the second primary OLT After the corresponding physical channel first primary OLT, the second primary OLT ONU connection corresponding with the first primary OLT is established and the The corresponding active channel of two primary OLT, and then the second primary OLT is primary by first by the business of the corresponding ONU of the first primary OLT The corresponding active channel of OLT switches active channel corresponding to the second primary OLT.That is, the second primary OLT is in its corresponding work Upstream bandwidth is distributed for the corresponding ONU of the first primary OLT on access, wherein each ONU for being assigned upstream bandwidth is primary second Upstream data is sent in the upstream bandwidth of OLT distribution.Restore business between ONU and spare OLT.

Process as shown in Figure 8, for step S802 before implementation, i.e., the second primary OLT knows the corresponding work of the first primary OLT Before breaking down as access, the second primary OLT receives the status information that remaining each primary OLT is sent and is deposited locally Storage, wherein status information includes the channel relevant information and distance measurement result information of the ONU of remaining each primary OLT self-management

First way: the physical channel that itself is increased newly is adjusted to the corresponding object of remaining each primary OLT by the second primary OLT After managing channel, start to receive upstream data, and record the time for receiving upstream data；

Second primary OLT will receive the time announcement of upstream data to remaining each primary OLT, by remaining each primary OLT Calculate the distance measurement value between the second primary OLT and each ONU.

The second way: the second primary OLT obtains the time that remaining each primary OLT sends downlink data；

After the physical channel that itself is increased newly is adjusted to the corresponding physical channel remaining each primary OLT by the second primary OLT, open Begin to receive upstream data, and records the time for receiving upstream data；

Second primary OLT calculates itself distance measurement value between each ONU according to the time of acquisition and the time of record.

In implementation process, the second primary OLT needs to obtain each primary OLT and sends downlink data second of distance measuring method Time, specific acquisition modes are as follows: the second primary OLT receives sent by remaining each primary OLT, remaining each primary OLT and sends The time of downlink data；Alternatively, the second primary OLT monitors the time that remaining each primary OLT sends downlink data.

Distance measurement value is being obtained using first way, i.e., the second primary OLT and each ONU are being calculated by remaining each primary OLT Between distance measurement value after, the second primary OLT receives and stores remaining each primary calculated distance measurement value of OLT；Alternatively, second is main Remaining each primary calculated distance measurement value of OLT is received with OLT and corresponding each ONU, it is each primary that remaining is stored by corresponding each ONU The calculated distance measurement value of OLT；

Distance measurement value is being obtained using the second way, i.e., the second primary OLT is calculated according to the time for obtaining and recording After itself distance measurement value between each ONU, the second primary OLT notifies calculated distance measurement value to give remaining each primary OLT, and leads to It crosses remaining primary OLT and notifies corresponding each ONU, the second primary calculated distance measurement value of OLT is stored by corresponding each ONU.

The first: corresponding each ONU receives the downlink frame that the second primary OLT is sent, and it is corresponding that itself is sent data immediately Distance measurement value be updated to storage distance measurement value；

Second: corresponding each ONU receives the order for the update distance measurement value that the second primary OLT is sent, and immediately sends out itself The distance measurement value for sending the corresponding distance measurement value of data to be updated to storage；

Corresponding each ONU itself will send the corresponding distance measurement value of data and be updated to after the distance measurement value stored, corresponding each The upstream bandwidth of the primary OLT distribution of ONU response second, sends uplink in the upstream bandwidth of distribution according to updated distance measurement value Data.

To implement above preferred embodiment, based on the same inventive concept, the embodiment of the invention also provides a kind of channel tune Engagement positions are set in the second primary OLT, and structural schematic diagram is as shown in Figure 9, comprising:

Second knows module 901, for knowing that the corresponding active channel of the first primary OLT breaks down；

Second adjustment module 902 for increasing a physical channel in the second primary OLT, and increased physics is led to Road is adjusted to the corresponding physical channel the first primary OLT.

Based on the same inventive concept, the embodiment of the invention also provides another channel method of adjustment, detailed processes Figure is as shown in Figure 10, comprising:

Step S1002, whether ONU judgement receives downlink data within a preset time；

Step S1004, if judging result is no, the physical channel of itself is adjusted to the finger not broken down by ONU Determine physical channel.

In embodiments of the present invention, using ONU as the main body of operation, if ONU does not receive lower line number within a preset time According to the active channel for then judging that itself is connected breaks down, and the physical channel of itself is adjusted to the specified object not broken down Manage channel.In the side OLT, do not need specified to be that the channel connecting with spare OLT refers to and determines physical channel, also not limit it Refer to the physical channel connecting primary OLT and determine physical channel, increase the range of selection, does not need to set for each OLT Set a spare OLT, that is, do not need the protection of 1:1 in the side OLT, save equipment cost.

In a preferred embodiment, specified physical channel may include that spare OLT transmission and reception data use Physical channel may include other transmission and the physical channel for receiving data that the first primary OLT is used, wherein first is primary OLT is the corresponding primary OLT of the ONU, can also include the primary OLT transmission of other in PON system and the object that reception data use Reason channel (including the physical channel and newly-increased physical channel used), wherein other primary OLT of primary OLT and first For different primary OLT.Certainly, the physical channel that specified physical channel may also be provided through third party (non-OLT), can be realized Transmission and reception data.

When implementation, ONU can be adjusted operation according to own situation, can also be adjusted according to the instruction that OLT is sent Whole operation, according to the difference of specified physical channel, now column give some instances, and are explained.

Example A, self transmission is adjusted to the corresponding physics of the ONU with the physical channel that uses of data is received when spare OLT After channel, which receives the adjustment notice that spare OLT is sent, and the physical channel of itself is adjusted to spare OLT transmission and is connect When receiving the physical channel that data use or the adjustment notice that ONU reception spare OLT is sent, the physical channel of itself is adjusted The adjustment that spare OLT is sent is received for the first primary OLT other transmission used and the physical channel for receiving data or ONU The physical channel of itself is adjusted to the physical channel that other primary OLT are used or increased newly by notice；

The physical channel of other transmission and reception data that example B, the first primary OLT use itself is adjusted to this ONU pairs After the physical channel answered, which receives the adjustment notice that the first primary OLT is sent, and the physical channel of itself is adjusted to the Other transmission and receive the physical channel of data or the adjustment of the primary OLT transmission of ONU reception first that one primary OLT is used The physical channel of itself is adjusted to spare OLT transmission and receives the physical channel that uses of data or ONU receives the by notice The physical channel of itself is adjusted to the physics that other primary OLT are used or increased newly and led to by the adjustment notice that one primary OLT is sent Road；

After the physical channel for using or increasing newly is adjusted to the corresponding physical channel the ONU by example C, other primary OLT, ONU receives the adjustment notice that other primary OLT are initiated, and the physical channel of itself is adjusted to other primary OLT and uses or increases newly Physical channel or ONU receive the adjustment notice that other primary OLT are initiated, the physical channel of itself is adjusted to spare OLT The physical channel or ONU that transmission and reception data use receive the adjustment notice that other primary OLT are initiated, by the object of itself Reason channel is adjusted to other transmission and the physical channel for receiving data that the first primary OLT is used.

Process as shown in Figure 10, after step S1004, i.e. the physical channel of itself is adjusted to specified physical channel by ONU Later, ONU will send the distance measurement value that data use and be updated to the corresponding distance measurement value for specifying physical channel.

In the present embodiment, ONU needs to update distance measurement value, then before the update, ONU will necessarily obtain updated ranging Value.Its corresponding acquisition modes includes: that ONU re-starts ranging, obtains updated distance measurement value；Or ONU reception is each primary The distance measurement value that OLT or spare OLT are sent, as the distance measurement value of the active channel of the corresponding OLT for sending distance measurement value.

When implementation, when specified physical channel is that spare OLT sends and receives the physical channel that data use, distance measurement value can To be calculated as follows:

When implementation, when specified physical channel is the physical channel that the second primary OLT is connect with ONU, distance measurement value can be by such as Under type calculates:

To implement above preferred embodiment, based on the same inventive concept, the embodiment of the invention also provides a kind of channel tune Engagement positions are set in ONU, and structural schematic diagram is as shown in figure 11, comprising:

Judgment module 1101, for judging whether receive downlink data within a preset time；

Third adjusts module 1102, if the judging result for judgment module 1101 is no, the physics of itself is led to Road is adjusted to the specified physical channel that do not break down.

It is clearer to become apparent from illustrating the embodiment of the present invention, now it is described with specific embodiment.

Example one (GPON mechanism)

In mixing PON, the primary OLT in each work manages one group of ONU, and spare OLT and ONU do not have information exchange When, the ONU that primary OLT is managed is led in the spare of corresponding spare OLT according to the order of other in running order primary OLT Road ranging (is also possible to the ONU that spare OLT notifies primary OLT oneself to need to manage primary OLT in other examples The ranging on the stand-by channel of corresponding spare OLT).

Ranging process is as follows: the wavelength of the reception data of oneself (is also possible to sub- load by spare OLT in other embodiments Wave or subcarrier group) be set as above-mentioned work OLT receive data wavelength (be also possible in other embodiments subcarrier or Person's subcarrier group).Primary OLT is by ONU-ID, T-CONT of the channel relevant information such as ONU of self-administered all ONU, sequence Number information, gigabit packaging method port-mark and all ONU are sent to spare in the balanced time delay value (EqD) of master channel OLT, spare OLT is synchronous with the primary OLT retention time, and spare OLT monitors primary OLT and sends downlink frame to ONU, and records transmission The time T1 and primary OLT of downlink frame allow the time (StartTime) of ONU transmission uplink frame, (in other examples Can be primary OLT and T1 and StartTime value be sent to spare OLT), after ONU receives distance measurement request, wait itself corresponding EqD (can also carry out ranging to the ONU of registration state of activation in other examples, at this time without storage EqD's at ONU Between, value between this is changed to random delay value) time and distance measurement request distribution StartTime after response ranging response. The receiving time T2 that spare OLT monitors the uplink frame that primary OLT receives ONU transmission (is also possible in other examples The value of T2 is sent to spare OLT by primary OLT), spare OLT records the value of above-mentioned T2, and records and oneself receive ONU transmission Receiving time T3 when uplink frame, it is spare that spare OLT calculates oneself EqD value EqD between the ONU are as follows:

EqD is spare=and EqDmax is spare-(T2-T1)+EqD+StartTime-(1+i downlink/i uplink) × (T3-T2)

Wherein, the spare maximum EqD value for alternate channel of EqDmax, EqD are in running order ONU in master channel On the time value of EqD that measures, the refractive index of the upper behavior uplink linght of i in a fiber, the refraction of behavior downlink light in a fiber under i Rate.

Spare OLT obtains an ONU of work OLT management after the EqD backed-up value of stand-by channel, obtains the ONU standby With the EqD of access is spare and difference Δ=spare-EqD of EqD of the EqD of primary access can obtain the work according to above-mentioned Δ All ONU of OLT management in stand-by channel EqD backed-up value, value be primary access EqD value and above-mentioned Δ value and, i.e., EqD is spare=EqD+ Δ.

Spare OLT is sent to primary OLT for EqD is spare, and primary OLT is sent to corresponding ONU for above-mentioned EqD is spare.ONU Store the spare value of the EqD.

When spare OLT does not have information exchange between ONU, spare OLT will receive the wavelength of upstream data (in other realities Apply and be also possible to subcarrier or subcarrier group in example) wavelength of other primary OLT reception upstream datas is adjusted to (in other realities Apply and be also possible to subcarrier or subcarrier group in example) upstream data is received afterwards, interior between predetermined, spare OLT receives uplink After data, continue that wavelength (the being also possible to subcarrier or subcarrier group in other embodiments) adjustment of upstream data will be received After the wavelength (being also possible to subcarrier or subcarrier group in other embodiments) for receiving upstream data for another primary OLT Upstream data is received, spare OLT repeats the above process.When spare OLT will receive the wavelength of upstream data (in other embodiments It is also possible to subcarrier or subcarrier group) it is adjusted to the wavelength of some primary OLT reception upstream data (in other embodiments Be also possible to subcarrier or subcarrier group) after do not receive upstream data whithin a period of time, then spare OLT judges some OLT Corresponding active channel cisco unity malfunction (or spare OLT does not receive upstream data whithin a period of time, then with corresponding master Communicated with OLT and obtain whether its corresponding active channel can work normally), if spare OLT determines certain through the above way When the corresponding active channel cisco unity malfunction of a primary OLT, spare OLT will receive the wavelength of upstream data (in other implementations It is also possible to subcarrier or subcarrier group in example) wavelength of primary OLT reception upstream data is adjusted to (in other embodiments In be also possible to subcarrier or subcarrier group), and the wavelength for sending downlink data (is also possible to son in other embodiments Carrier wave or subcarrier group) it is adjusted to the primary OLT and sends the wavelength of downlink data (to be also possible to sub- load in other embodiments Wave or subcarrier group), based on T-CONT to the distribution upstream bandwidth of the primary OLT ONU managed, ONU receives standby spare OLT It is the EqD value of stand-by channel, ONU response according to the EqD value that the identity information of spare OLT updates oneself after the downlink frame of OLT The upstream bandwidth of spare OLT distribution, the uplink distributed in spare OLT to oneself according to the corresponding EqD of updated stand-by channel Upstream data is sent in bandwidth.

ONU is the EqD value of stand-by channel according to the EqD value that the identity information of spare OLT updates oneself in the present embodiment, After in other examples can also be using the order for updating distance measurement value that spare OLT is sent, oneself be sent into data immediately Corresponding distance measurement value is updated to the distance measurement value of stand-by channel；It, actively will be certainly or after ONU does not receive downlink frame whithin a period of time Oneself sends the distance measurement value that the corresponding distance measurement value of data is updated to stand-by channel.

It is OLT in the present embodiment by (being also possible to subcarrier or son in other embodiments in different wavelength Carrier wave set) on receive upstream data confirm whether the corresponding active channel of the wavelength works normally, in other examples Can be using the OLT of work in its corresponding active channel cisco unity malfunction, notice spare OLT will receive data and transmission The wavelength (being also possible to subcarrier or subcarrier group in other embodiments) of data is adjusted to oneself corresponding wavelength (at it It is also possible to subcarrier or subcarrier group in his embodiment) it replaces oneself communicating with corresponding ONU.

It is calculating of the spare OLT completion to ranging process in the present embodiment, can also uses in other examples Spare OLT receives uplink after the physical channel for receiving upstream data to be adjusted to the physical channel of other OLT reception upstream data Data, and record and receive time of upstream data, spare OLT will receive the time announcement of upstream data to other OLT, by Other OLT calculate the distance measurement value between spare OLT and ONU and notify that, to spare OLT, spare OLT stores above-mentioned distance measurement value；Or Person notifies that, to spare OLT and ONU, ONU stores spare distance measurement value.

Spare OLT has one group of Receiver And Transmitter in the present embodiment, can have at OLT in other examples more Spare OLT in the working method and the present embodiment of a Receiver And Transmitter, every group of receiver and tunable transmitter The working method of one group of Receiver And Transmitter is identical.

Example two (EPON mechanism)

In mixing PON as shown in Figure 5, the primary OLT in each work manages one group of ONU, and spare OLT and ONU do not have When having information exchange, the ONU managed according to the order of other in running order primary OLT primary OLT is spare in correspondence (being also possible to spare OLT in other examples notifies primary OLT oneself to need to primary for ranging on the stand-by channel of OLT The ONU of OLT management ranging on the stand-by channel of corresponding spare OLT).Ranging process is as follows: spare OLT is by the reception number of oneself According to wavelength (being also possible to subcarrier or subcarrier group in other embodiments) be set as above-mentioned work OLT and receive data Wavelength (is also possible to subcarrier or subcarrier group) in other embodiments.Primary OLT leads to self-administered all ONU's Balanced time delay value loop time of LLID, Media access contorl address and all ONU of road relevant information such as ONU in master channel (Round Trip Time, abbreviation RTT) is sent to spare OLT, and spare OLT is synchronous with the primary OLT retention time, spare OLT prison Primary OLT is listened to send downlink frame to ONU, and the time T0 for recording transmission downlink frame (is also possible to lead in other examples T0 value is sent to spare OLT with OLT), after ONU receives distance measurement request, it is T0 by the time stamp setting of oneself, is answered in time T1 Answer ranging response.Spare OLT monitors primary OLT and receives the receiving time T2 for the uplink frame that ONU is sent (in other embodiments In be also possible to primary OLT the value of T2 be sent to spare OLT), spare OLT records the value of above-mentioned T2, and records oneself and receive Receiving time T2 ' when the uplink frame sent to ONU, spare OLT calculates oneself RTT value between the ONU are as follows:

RTT is spare=2 × T2 '-T1-T2

Spare OLT obtains an ONU of work OLT management after the RTT value of stand-by channel, obtains the ONU spare logical The RTT on road is spare and difference Δ=spare-RTT of RTT of the RTT of primary access can obtain work OLT pipe according to above-mentioned Δ All ONU of reason in stand-by channel RTT backed-up value, value be primary access RTT value and above-mentioned Δ value and, i.e., RTT is standby With=RTT+ Δ.Spare OLT stores the spare value of above-mentioned EqD.

When spare OLT does not have information exchange between ONU, spare OLT will receive the wavelength of upstream data (in other realities Apply and be also possible to subcarrier or subcarrier group in example) wavelength of other primary OLT reception upstream datas is adjusted to (in other realities Apply and be also possible to subcarrier or subcarrier group in example) receive upstream data afterwards, after spare OLT receives upstream data, continue by It is primary that the wavelength (being also possible to subcarrier or subcarrier group in other embodiments) of reception upstream data is adjusted to another The wavelength (being also possible to subcarrier or subcarrier group in other embodiments) that OLT receives upstream data receives uplink number afterwards According to spare OLT repeats the above process.When the wavelength for receiving upstream data (is also possible to son by spare OLT in other embodiments Carrier wave or subcarrier group) it is adjusted to some primary OLT and receives the wavelength of upstream data (to be also possible to son in other embodiments Carrier wave or subcarrier group) after do not receive upstream data whithin a period of time, then spare OLT judges the corresponding work of some OLT Access cisco unity malfunction (or spare OLT does not receive upstream data whithin a period of time, then communicates with corresponding primary OLT Obtain whether its corresponding active channel can work normally), if spare OLT determines some primary OLT through the above way When corresponding active channel cisco unity malfunction, spare OLT (in other embodiments can also be with by the wavelength for receiving upstream data It is subcarrier or subcarrier group) it is adjusted to the primary OLT and receives the wavelength of upstream data (to be also possible in other embodiments Subcarrier perhaps subcarrier group) and the wavelength for sending downlink data (is also possible to subcarrier or son in other embodiments Carrier wave set) it is adjusted to the primary OLT and sends the wavelength of downlink data (to be also possible to subcarrier in other embodiments or son carries Wave group), spare OLT gives the distribution upstream bandwidth of the ONU that primary OLT is managed based on LLID and ONU in the RTT of stand-by channel, ONU sends upstream data in the upstream bandwidth that spare OLT is distributed to oneself.

It is calculating of the spare OLT completion to ranging process in the present embodiment, can also uses in other examples Spare OLT receives uplink after the physical channel for receiving upstream data to be adjusted to the physical channel of other OLT reception upstream data Data, and record and receive time of upstream data, spare OLT will receive the time announcement of upstream data to other OLT, by Other OLT calculate the distance measurement value between spare OLT and ONU and notify that, to spare OLT, spare OLT stores above-mentioned distance measurement value.

It can be seen from the above description that the present invention realizes following technical effect:

In embodiments of the present invention, there is the spare OLT spare exclusively for primary OLT, as any one primary OLT ( One primary OLT) when breaking down, it is corresponding that itself corresponding physical channel is directly adjusted to the first primary OLT by spare OLT Physical channel.It can be seen that in this example, the type of physical channel is directly had adjusted, and for the side ONU, the object of ONU connection The type in channel is managed there is no changing, therefore, ONU does not need to do large variation, haves no need to change oneself state yet, it is only necessary to after Continued access continues the physical channel.In the side OLT, the physical channel of oneself with flexibility can be adjusted to occur by spare OLT The corresponding physical channel primary OLT of failure does not need that a spare OLT is arranged for each OLT, that is, be not required in the side OLT The protection of 1:1 is wanted, equipment cost is saved.

In embodiments of the present invention, and the spare OLT spare exclusively for primary OLT is not present, as any one primary OLT When (the first primary OLT) breaks down, by equally itself increasing a new physics as the second primary OLT of primary OLT Increased physical channel is adjusted to the corresponding physical channel the first primary OLT, is first using increased physical channel by channel Primary OLT provides active service.It can be seen that in this example, the type of the newly-increased physical channel the second primary OLT is had adjusted, For the side ONU, the type of the physical channel of ONU connection is there is no changing, and therefore, ONU does not need to do large variation, not yet It needs to change oneself state, it is only necessary to continue to connect the physical channel.In the side OLT, can with flexibility select Two primary OLT increase a physical channel, are adjusted to the corresponding physical channel primary OLT broken down, realize master With OLT mutual backup OLT, do not need that a spare OLT is arranged for each OLT, that is, do not need the guarantor of 1:1 in the side OLT Shield saves equipment cost.

In embodiments of the present invention, using ONU as the main body of operation, if ONU does not receive lower line number within a preset time According to the active channel for then judging that itself is connected breaks down, and the physical channel of itself is adjusted to the specified object not broken down Manage channel.It can be seen that in this example, in the side OLT, do not need specified be the channel connecting with spare OLT to be specified Physical channel does not limit it yet and refers to the physical channel connecting primary OLT and determine physical channel, increases the range of selection, and It does not need that a spare OLT is arranged for each OLT, that is, do not need the protection of 1:1 in the side OLT, save equipment cost.

Obviously, those skilled in the art should be understood that each module of the above invention or each step can be with general Computing device realize that they can be concentrated on a single computing device, or be distributed in multiple computing devices and formed Network on, optionally, they can be realized with the program code that computing device can perform, it is thus possible to which they are stored It is performed by computing device in the storage device, and in some cases, it can be to be different from shown in sequence execution herein Out or description the step of, perhaps they are fabricated to each integrated circuit modules or by them multiple modules or Step is fabricated to single integrated circuit module to realize.In this way, the present invention is not limited to any specific hardware and softwares to combine.

The foregoing is only a preferred embodiment of the present invention, is not intended to restrict the invention, for the skill of this field For art personnel, the invention may be variously modified and varied.All within the spirits and principles of the present invention, made any to repair Change, equivalent replacement, improvement etc., should all be included in the protection scope of the present invention.

Claims

1. a kind of channel method of adjustment characterized by comprising

Spare optical line terminal OLT knows that the corresponding active channel of the first primary OLT breaks down；

Itself corresponding physical channel is adjusted to the corresponding physical channel the described first primary OLT by the spare OLT.

2. the method according to claim 1, wherein the spare OLT knows that the described first primary OLT is corresponding Active channel breaks down, comprising:

The failure notification that the spare OLT receives at least one primary OLT or network management system is sent, knows that described first is primary The corresponding active channel of OLT breaks down；Or

The spare OLT actively obtains the active channel state of each primary OLT, knows the corresponding work of the described first primary OLT Access breaks down.

3. according to the method described in claim 2, it is characterized in that, the work that the spare OLT actively obtains each primary OLT is led to Line state knows that the corresponding active channel of the described first primary OLT breaks down, comprising:

When information exchange being not present between the spare OLT and each optical network unit ONU, the spare OLT corresponds to itself Physical channel be adjusted to the corresponding physical channel the described first primary OLT, if within a specified time, the spare OLT is through adjusting Physical channel after whole does not receive upstream data, then knows that the corresponding active channel of the described first primary OLT breaks down；Or Person

The spare OLT is communicated with the described first primary OLT or the network management system, knows the described first primary OLT Corresponding active channel breaks down.

4. the method according to claim 1, wherein the spare OLT adjusts itself corresponding physical channel After the corresponding physical channel the described first primary OLT, further includes:

Spare OLT ONU connection corresponding with the described first primary OLT, establishes work corresponding with the spare OLT and leads to Road；

The spare OLT is led to the business of the corresponding ONU of the described first primary OLT by the corresponding work of the described first primary OLT Switch active channel corresponding to the spare OLT in road.

5. the method according to claim 1, wherein the spare OLT knows the corresponding work of the first primary OLT Before access breaks down, comprising:

The spare OLT receives the status information that each primary OLT is sent, wherein the status information includes each primary OLT itself The channel relevant information and distance measurement result information of the ONU of management；

The spare OLT stores the status information.

6. according to the method described in claim 5, it is characterized in that,

The channel relevant information includes at least one following: the mark ONU-ID of each ONU, logical links label L LID, transmission Container T-CONT, sequence number information, Media access contorl address and gigabit packaging method port-mark；

The distance measurement result information includes: the distance measurement value between the spare OLT and each ONU.

7. according to the method described in claim 6, it is characterized in that, the corresponding each ONU of the spare OLT is stored with the ranging When value,

Corresponding each ONU receives the downlink frame that the spare OLT is sent, itself will send the corresponding distance measurement value of data immediately It is updated to the distance measurement value of storage；Or

Corresponding each ONU receives the order for the update distance measurement value that the spare OLT is sent, itself is sent data pair immediately The distance measurement value answered is updated to the distance measurement value of storage；Or

Corresponding each ONU does not receive downlink frame within a preset time, then itself will actively send the corresponding ranging of data Value is updated to the distance measurement value of storage.

8. method according to claim 6 or 7, which is characterized in that the distance measurement value is following one of any: loop time delay Value, balanced time delay value and loop time.

9. method according to any one of claims 1 to 7, which is characterized in that the physical channel is following one of any: Wavelength, wavelength are to, subcarrier and subcarrier group.

10. a kind of channel method of adjustment characterized by comprising

Second primary optical line terminal OLT knows that the corresponding active channel of the first primary OLT breaks down；

The second primary OLT itself increases a physical channel, and it is primary that increased physical channel is adjusted to described first The corresponding physical channel OLT.

11. according to the method described in claim 10, it is characterized in that, the second primary OLT knows that the first primary OLT is corresponding Active channel break down, comprising:

The failure notification that the second primary OLT receives at least one primary OLT or network management system is sent, knows described first The corresponding active channel of primary OLT breaks down；Or

The second primary OLT actively obtains the active channel state of remaining each primary OLT, knows described first primary OLT pairs The active channel answered breaks down.

12. according to the method for claim 11, which is characterized in that it is each primary that the second primary OLT actively obtains remaining The active channel state of OLT knows that the corresponding active channel of the described first primary OLT breaks down, comprising:

Information exchange is not present between the second primary OLT and each optical network unit ONU of the first primary OLT management When, the physical channel that itself is increased newly is adjusted to the corresponding physical channel the described first primary OLT by the second primary OLT, if Within a specified time, the physical channel that the described second primary OLT is increased newly through itself does not receive upstream data, then knows described the The corresponding active channel of one primary OLT breaks down；Or

The second primary OLT is communicated with the described first primary OLT or the network management system, knows that described first is primary The corresponding active channel of OLT breaks down.

13. according to the method described in claim 10, it is characterized in that, the second primary OLT knows that the first primary OLT is corresponding Active channel break down before, comprising:

The second primary OLT receives the status information that remaining each primary OLT is sent, wherein the status information includes remaining The channel relevant information and distance measurement result information of the ONU of each primary OLT self-management；

The second primary OLT stores the status information；

Wherein, the channel relevant information includes at least one following: the mark ONU-ID of each ONU, logical links label L LID, Transmit container T-CONT, sequence number information, Media access contorl address and gigabit packaging method port-mark；

The distance measurement result information includes: the distance measurement value between the described second primary OLT and each ONU.

14. according to the method for claim 13, which is characterized in that when the corresponding each ONU of the described second primary OLT stores institute When stating distance measurement value,

Corresponding each ONU receives the downlink frame that the described second primary OLT is sent, itself will send the corresponding survey of data immediately The distance measurement value of storage is updated to away from value；Or

Corresponding each ONU receives the order for the update distance measurement value that the described second primary OLT is sent, itself is sent number immediately The distance measurement value of storage is updated to according to corresponding distance measurement value；Or

15. method described in 3 or 14 according to claim 1, which is characterized in that the distance measurement value is following one of any: loop Time delay value, balanced time delay value and loop time.

16. method according to any one of claims 10 to 14, which is characterized in that the physical channel be it is following it is any it One: wavelength, wavelength are to, subcarrier and subcarrier group.

17. a kind of passage adjustment device, which is characterized in that be set in spare optical line terminal OLT, comprising:

First knows module, for knowing that the corresponding active channel of the first primary OLT breaks down；

The first adjustment module, for itself corresponding physical channel to be adjusted to the corresponding physical channel the described first primary OLT.

18. a kind of passage adjustment device, which is characterized in that be set in the primary OLT of second not broken down, comprising:

Second knows module, for knowing that the corresponding active channel of the first primary OLT breaks down；

Second adjustment module, for increasing a physical channel in the described second primary OLT, and by increased physical channel tune It is whole for the corresponding physical channel the described first primary OLT.