CN103378918A

CN103378918A - Method for adjusting channel and apparatus

Info

Publication number: CN103378918A
Application number: CN2012101162108A
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: 2013-10-30
Anticipated expiration: 2032-04-19
Also published as: CN103378918B; CN107645354A

Abstract

The invention discloses a method for adjusting a channel and an apparatus. According to the method for adjusting the channel, a standby OLT is notified that a working path corresponding to a first main OLT fails; and a physical channel corresponding to the standby OLT is adjusted to be a physical channel corresponding to the first main OLT. The method for adjusting the channel and the apparatus are used for solving the problems that extended switching time in the related art affects rapid returning of an ONU and the OLT to normal communication, resulting in failure in meeting users' requirement for network fault quick recovery and comparatively high costs for equipment.

Description

Passage method of adjustment and device

Technical field

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

Background technology

Along with the development of network technology, can utilize the business such as a large amount of voice of Internet Transmission, data, video, therefore the requirement of bandwidth improved constantly, EPON (PON) is exactly to produce under this demand.

The topological structure of PON system as shown in Figure 1, the PON system is usually by the optical line terminal (OLT) of office's side, optical network unit (ONU) and the Optical Distribution Network (ODN of user's side, be also referred to as optical splitter) form, usually adopt point-to-multipoint network configuration.ODN is comprised of Passive Optical Components such as monomode fiber and optical branching device, optical connectors, for the physical connection between OLT and the ONU provides light-transmitting medium.Mainly contain time division multiplexing (Time Division Multiplexing in the PON technology at present, referred to as TDM) PON system, wavelength division multiplexing (Wavelength Division Multiplexing, referred to as WDM) PON system, OFDM (Orthogonal Frequency Division Multiplexing, referred to as OFDM) PON system and mixing PON system, mix in the PON system and comprise Wave time division mixing PON system, frequency-division and time-division mixing PON system etc. and wavelength-division frequency-division and time-division mixing PON system.

In time-multiplexed PON system, gigabit passive optical network (Gigabit-Capable Passive OpticalNetwork for example, referred to as GPON) system, ethernet passive optical network (Ethernet Passive Optical Network, be called for short EPON) system, 10 gigabit passive optical networks (10-Gigabit-capable passive optical network, abbreviation XG-PON) in system and the 10-Gigabit-capable EPON system, the transfer of data of down direction (by OLT to ONU) adopts broadcast mode, each ONU receives respectively all frames, again according to ONU sign (ONU-ID), sensor network interface sign (GEM-PortID), allocation identification (Allocation-ID), the information such as LLID (Logical Link identity is referred to as LLID) are obtained one's own frame.For the transfer of data of up direction (from ONU to OLT) because each ONU need to share transmission medium, so each ONU should be in OLT arranges transmit ascending data to the time slot of oneself.

In the WDM-PON system, there are a plurality of different wave length reflectors at the OLT place, the optical wavelength of each optical transmitting set is respectively λ d1, λ d2 ..., λ dn, wherein λ d1 is that OLT sends the wavelength that downlink data adopts when communicating by letter with first ONU, λ d2 is that OLT sends the wavelength that downlink data adopts when communicating by letter with second ONU ..., λ dn is the wavelength of OLT transmission downlink data employing when communicating by letter with n ONU; The generation wavelength of the reflector at each ONU place all is different from the emission wavelength of other ONU place reflectors, for example first ONU is λ u1 for the emission wavelength that sends the reflector of upstream data to OLT, second ONU is λ u2 for the emission wavelength that sends the reflector of upstream data to OLT, ..., n ONU is λ un for the emission wavelength that sends the reflector of upstream data to OLT, adopt above-mentioned technology, OLT can send downlink data for simultaneously all ONU, each ONU also can send upstream data simultaneously, and namely OLT and ONU are the structure that adopts point-to-point at optical channel.

In the OFDM-PON system, there are a plurality of different subcarriers at the OLT place, each subcarrier is respectively C1, C2, ..., Cn, and each subcarrier is quadrature, the downlink data that OLT will send to first ONU is modulated to (quantity of every group of subcarrier can be identical or different) on first group of subcarrier, the downlink data that OLT will send to second ONU is modulated on second group of subcarrier, ..., the downlink data that OLT will send to n ONU is modulated on the n group subcarrier, send between the subcarrier group that the downlink data of different ONU adopts and do not occur simultaneously, be that different ONU uses different subcarrier groups, it is that OLT distributes to ONU that ONU sends to the subcarrier that the upstream data of OLT adopts, and it is identical that the subcarrier that ONU place is used for sending upstream data to OLT and OLT adopt to the subcarrier of current ONU transmission downlink data, also can difference.Adopt above-mentioned technology, OLT can send downlink data for simultaneously all ONU, and each ONU also can send upstream data simultaneously, and namely OLT and ONU are the structure that adopts point-to-point at optical channel.

The topological structure of Wave time division mixing PON system and frequency-division and time-division mixing PON system is shown in Fig. 2 a and Fig. 2 b.In Fig. 2 a and Fig. 2 b, each OLT manages one group of ONU, and one group of ONU in the Wave time division mixing PON system is same for the upgoing wave appearance that sends upstream data, and the downstream wavelength of downlink data receiving is also identical; The subcarrier group that one group of ONU in the frequency-division and time-division mixing PON system be used for to send upstream data is identical, and the subcarrier group of downlink data receiving is also identical, and the different ONU among one group of ONU are by time-multiplexed mode transmit ascending data.Downstream wavelength (subcarrier group) difference of different OLT, the up wavelength (subcarrier group) that every group of ONU of different OLT management uses is also different.Each ONU sends upstream data according to the order of OLT in specific ascending time slot.

In the application deployment of EPON, there are certain customers to need higher fail safe, wish that operator can provide a kind of security mechanism to guarantee that its service channel does not interrupt, perhaps the requirement of time one-level is, can have no progeny in service channel and recover fast.This has just proposed protection path and the fast requirement of switched path to the EPON of carrying customer service operation.

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

What Fig. 3 represented is the mode of the protection trunk optical fiber of type B.Two light mouth PON (0) of OLT and PON (1) all are connected to the optical splitter of a 2:N, and this optical splitter down direction is connected to each ONU by optical fiber respectively.The light mouth PON (0) of OLT is primary path by the path that optical splitter arrives ONU, and the light mouth PON (1) of OLT is stand-by channel by the path that optical splitter arrives ONU.Have no progeny in the service path of primary path as optical network unit and optical line terminal, keep communicating by letter between optical network unit and optical line terminal with enabling stand-by channel.

What Fig. 4 represented is the all-fiber protection mode of Type C.The light mouth PON (0) of OLT is connected to the optical splitter 1 of 1:N, and the light mouth PON (1) of OLT is connected to the optical splitter 2 of 1:N, and these two optical splitters are connected with each ONU by optical fiber respectively.The light mouth PON (0) of OLT is primary path by the path that optical splitter 1 arrives ONU, and the light mouth PON (1) of OLT is stand-by channel by the path that optical splitter 2 arrives ONU.Have no progeny in the service path of primary path as optical network unit and optical line terminal, keep communicating by letter between optical network unit and optical line terminal with enabling stand-by channel.

Fig. 5 has enumerated when ONU carries out different operations respectively, triggers this ONU and enters various states.Concrete,

ONU is in initial condition (O1) when not carrying out any operation;

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

ONU receives up overhead parameter, or ONU reception ONU ID, enters distance measuring states (O4);

When ONU receives balanced time delay (Equalization Delay is referred to as EqD), enter running status (O5), thereby can realize receiving and the transmission of data;

If it is unusual that ONU detects path, produce the LOS/LOF alarm, then change dropout state (O6) over to;

When the TO2 timer expiry, then ONU turns back to initial condition (O1).

Under the existing protected mode of EPON, existing in conjunction with Fig. 5, behind primary path fault, enable the process of stand-by channel as the logic state transition process of example explanation optical network unit:

ONU and the OLT primary path by between the two is that PON LT (0) mouthful path is communicated by letter, and ONU is in running status (O5);

Have no progeny in the primary path, ONU can't detect the light signal of OLT at primary path, produce the LOS/LOF alarm after, enter ejection state (O6), ONU enters initial condition (O1) after being in the duration of time above the setting of TO2 timer of ejection state (O6);

OLT enables the path that stand-by channel is PON LT (1) mouth, send downlink optical signal to ONU, after ONU detects the downlink optical signal of OLT, eliminate the LOS/LOF alarm of OLT, by stand-by channel and OLT finish that frame is delimited and synchronously after, ONU changes serial-number-state (O2, O3) over to from initial condition (O1), and ONU receives the up overhead parameter that OLT sends; Up overhead parameter comprises: the lead code bit type; Delimiter parameter (Delimiter) etc.; After OLT switched to stand-by channel from primary path, need were redistributed the ID of the ONU of its management, and the ID of each ONU after will redistributing is sent to each ONU; ONU changes distance measuring states (O4) over to after receiving the ONU-ID information of OLT transmission;

ONU changes running status (O5) over to from distance measuring states (O4) after receiving the EqD message of OLT transmission;

So far, the stand-by channel between ONU and OLT is set up fully, and ONU and OLT carry out information interaction by this stand-by channel.

In the above path handoff procedure, set up the physical layer path on the stand-by channel after, OLT need send the related data such as EqD to all ONU, each ONU need to upgrade self parameter after receiving related data, can recover normal operating conditions.Describe as an example of the network configuration of type B example, when the ONU that OLT manages had 32, in the handoff procedure, OLT needed and 32 ONU also all finish as shown in Figure 5 state transition processes (namely experiencing O1, O2, O3, O4 and O5) alternately.The problem that existing procedure exists comprises: each ONU all finishes above-mentioned a series of state transition makes OLT need bear a large amount of message transmission work; The time of prolong switching affect the fast quick-recovery proper communication of ONU and OLT, makes ONU and OLT recover to work substantially consuming time at 100 milliseconds more than the magnitude, can not satisfy the user to the requirement of the fast quick-recovery of network failure.And for realizing that each OLT place of defencive function exists a primary PON mouth and PON mouth for subsequent use, namely the OLT side is 1: 1 protection, has increased equipment cost in the said process.

For prolonging the time of switching in the correlation technique, affect the fast quick-recovery proper communication of ONU and OLT, can not satisfy the user to requirement and the higher problem of equipment cost of the fast quick-recovery of network failure, effective solution is not yet proposed at present.

Summary of the invention

Time for prolong switching in the correlation technique affects the fast quick-recovery proper communication of ONU and OLT, can not satisfy the user to requirement and the higher problem of equipment cost of the fast quick-recovery of network failure, the invention provides a kind of, to address the above problem at least.

According to an aspect of the present invention, provide a kind of passage method of adjustment, having comprised: optical line terminal OLT for subsequent use knows that active channel corresponding to the first primary OLT breaks down; Described spare OLT is adjusted into physical channel corresponding to the described first primary OLT with the physical channel of self correspondence.

Preferably, described spare OLT knows that active channel corresponding to the described first primary OLT breaks down, comprise: described spare OLT receives the signalling trouble of at least one primary OLT or network management system transmission, knows that active channel corresponding to the described first primary OLT breaks down; Perhaps the active channel state of described each primary OLT of spare OLT active obtaining knows that active channel corresponding to the described first primary OLT breaks down.

Preferably, the active channel state of described each primary OLT of spare OLT active obtaining, know that active channel corresponding to the described first primary OLT breaks down, comprise: when all not having information interaction between described spare OLT and each optical network unit ONU, described spare OLT is adjusted into physical channel corresponding to the described first primary OLT with the physical channel of self correspondence, if at the appointed time, the physical channel of described spare OLT after adjusting do not receive upstream data, knows that then active channel corresponding to the described first primary OLT breaks down; Perhaps described spare OLT and the described first primary OLT or described network management system communicate, and know that active channel corresponding to the described first primary OLT breaks down.

Preferably, described spare OLT is adjusted into the physical channel of self correspondence after physical channel corresponding to the described first primary OLT, also comprise: the described spare OLT ONU corresponding with the described first primary OLT connects, and sets up the active channel corresponding with described spare OLT; The business of the ONU that described spare OLT is corresponding with the described first primary OLT is switched to active channel corresponding to described spare OLT by active channel corresponding to the described first primary OLT.

Preferably, before described spare OLT knows that active channel corresponding to the first primary OLT breaks down, comprise: described spare OLT receives the state information that each primary OLT sends, and wherein, described state information comprises passage relevant information and the range finding object information of the ONU of each primary OLT self-management; Described spare OLT is stored described state information.

Preferably, described passage relevant information comprise following one of at least: the sign ONU-ID of each ONU, logical links label L LID, transmission container T-CONT, sequence number information, medium access control address and gigabit method for packing port-mark; Described range finding object information comprises: the distance measurement value between described spare OLT and each ONU.

Preferably, when each ONU corresponding to described spare OLT stored described distance measurement value, each ONU of described correspondence received the downlink frame that described spare OLT sends, and immediately self was sent the distance measurement value that distance measurement value corresponding to data is updated to storage; Perhaps each ONU of described correspondence receives the order of the renewal distance measurement value of described spare OLT transmission, immediately self is sent the distance measurement value that distance measurement value corresponding to data is updated to storage; Perhaps each ONU of described correspondence does not receive downlink frame in Preset Time, then initiatively self is sent the distance measurement value that distance measurement value corresponding to data is updated to storage.

Preferably, described distance measurement value be following one of arbitrarily: loop time delay value, balanced time delay value and loop time.

Preferably, described physical channel be following one of arbitrarily: wavelength, wavelength are to, subcarrier and subcarrier group.

According to another aspect of the present invention, provide another passage method of adjustment, having comprised: the second primary optical line terminal OLT knows that active channel corresponding to the first primary OLT breaks down; The described second primary OLT self increases a physical channel, and the physical channel that increases is adjusted into physical channel corresponding to the described first primary OLT.

Preferably, the described second primary OLT knows that active channel corresponding to the first primary OLT breaks down, comprise: the described second primary OLT receives the signalling trouble of at least one primary OLT or network management system transmission, knows that active channel corresponding to the described first primary OLT breaks down; Perhaps the active channel state of described second primary all the other each primary OLT of OLT active obtaining knows that active channel corresponding to the described first primary OLT breaks down.

Preferably, the active channel state of described second primary all the other each primary OLT of OLT active obtaining, know that active channel corresponding to the described first primary OLT breaks down, comprise: when all not having information interaction between each optical network unit ONU of the described second primary OLT and the described first primary OLT management, the described second primary OLT physical channel that self is newly-increased is adjusted into physical channel corresponding to the described first primary OLT, if at the appointed time, the described second primary OLT does not receive upstream data through the physical channel that self increases newly, knows that then active channel corresponding to the described first primary OLT breaks down; Perhaps the described second primary OLT and the described first primary OLT or described network management system communicate, and know that active channel corresponding to the described first primary OLT breaks down.

Preferably, before the described second primary OLT knows that active channel corresponding to the first primary OLT breaks down, comprise: the described second primary OLT receives the state information that all the other each primary OLT send, wherein, described state information comprises passage relevant information and the range finding object information of the ONU of all the other each primary OLT self-managements; The described second primary OLT stores described state information; Wherein, described passage relevant information comprise following one of at least: the sign ONU-ID of each ONU, logical links label L LID, transmission container T-CONT, sequence number information, medium access control address and gigabit method for packing port-mark; Described range finding object information comprises: the distance measurement value between the described second primary OLT and each ONU.

Preferably, when each ONU corresponding to the described second primary OLT stored described distance measurement value, each ONU of described correspondence received the downlink frame that the described second primary OLT sends, and immediately self is sent the distance measurement value that distance measurement value corresponding to data is updated to storage; Perhaps each ONU of described correspondence receives the order of the renewal distance measurement value of the described second primary OLT transmission, immediately self is sent the distance measurement value that distance measurement value corresponding to data is updated to storage; Perhaps each ONU of described correspondence does not receive downlink frame in Preset Time, then initiatively self is sent the distance measurement value that distance measurement value corresponding to data is updated to storage.

According to another aspect of the present invention, provide another passage method of adjustment, having comprised: optical network unit ONU judges whether receive downlink data in Preset Time; When if the determination result is NO, then described ONU initiatively is adjusted into non-appointment physical channel of breaking down with the physical channel of self.

Preferably, described appointment physical channel comprises: the physical channel of optical line terminal OLT transmission for subsequent use and receive data use; Perhaps other transmission of using of the first primary OLT and the physical channel of receive data, wherein, the described first primary OLT is primary OLT corresponding to described ONU; Perhaps the primary OLT of other in the passive optical network PON system uses or newly-increased physical channel, and wherein, described other primary OLT and the described first primary OLT are different primary OLT.

Preferably, described ONU is adjusted into non-appointment physical channel of breaking down with the physical channel of self, comprise: after the physical channel that spare OLT is used self transmission and receive data is adjusted into physical channel corresponding to described ONU, described ONU receives the adjustment notice that described spare OLT sends, the physical channel of self is adjusted into the physical channel that described spare OLT is transmitted and receive data uses, perhaps described ONU receives the adjustment notice that described spare OLT sends, the physical channel of self is adjusted into other transmission of the described first primary OLT use and the physical channel of receive data, perhaps described ONU receives the adjustment notice that described spare OLT sends, and self physical channel is adjusted into described other primary OLT uses or newly-increased physical channels; Other transmission that the described first primary OLT uses self and the physical channel of receive data are adjusted into after physical channel corresponding to described ONU, described ONU receives the adjustment notice that the described first primary OLT sends, the physical channel of self is adjusted into other transmission of the described first primary OLT use and the physical channel of receive data, perhaps described ONU receives the adjustment notice that the described first primary OLT sends, the physical channel of self is adjusted into the physical channel that described spare OLT is transmitted and receive data uses, perhaps described ONU receives the adjustment notice that the described first primary OLT sends, and self physical channel is adjusted into described other primary OLT uses or newly-increased physical channels; Described other primary OLT will use or newly-increased physical channel is adjusted into after physical channel corresponding to described ONU, described ONU receives the adjustment notice that described other primary OLT initiate, the physical channel of self is adjusted into the physical channel that described other primary OLT use or increase newly, perhaps described ONU receives the adjustment notice that described other primary OLT initiate, the physical channel of self is adjusted into the physical channel that described spare OLT is transmitted and receive data uses, perhaps described ONU receives the adjustment notice that described other primary OLT initiate, and self physical channel is adjusted into other transmission that the described first primary OLT uses and the physical channel of receive data.

Preferably, described ONU adjusts to the physical channel of self after the appointment physical channel of not breaking down, and comprising: described ONU will send the distance measurement value that distance measurement value that data use is updated to corresponding described appointment physical channel; The distance measurement value that described ONU will send the data use is updated to before the distance measurement value of corresponding described appointment physical channel, and comprising: described ONU re-starts range finding, the distance measurement value after obtaining to upgrade; Perhaps, described ONU receives the distance measurement value of each primary OLT or the transmission of described spare OLT, with its distance measurement value as the active channel of the OLT of correspondence transmission distance measurement value.

According to a further aspect in the invention, provide a kind of passage adjusting device, be arranged in the optical line terminal OLT for subsequent use, having comprised: first knows module, is used for knowing that active channel corresponding to the first primary OLT breaks down; The first adjusting module is used for the physical channel of self correspondence is adjusted into physical channel corresponding to the described first primary OLT.

According to another aspect of the present invention, provide another passage adjusting device, be arranged among the second primary OLT that does not break down, comprising: second knows module, is used for knowing that active channel corresponding to the first primary OLT breaks down; The second adjusting module is used for increasing a physical channel at the described second primary OLT, and the physical channel that increases is adjusted into physical channel corresponding to the described first primary OLT.

According to another aspect of the present invention, provide another passage adjusting device, be arranged in the optical network unit ONU, having comprised: judge module is used for judging whether receive downlink data in Preset Time; If the 3rd adjusting module when being used for described judge module the determination result is NO, then initiatively is adjusted into the appointment physical channel of not breaking down with self physical channel.

In embodiments of the present invention, existing specially is primary OLT spare OLT for subsequent use, as any one primary OLT (the first primary OLT) when breaking down, spare OLT directly is adjusted into this physical channel corresponding to the first primary OLT with the physical channel of self correspondence.This shows, in this example, directly adjusted the type of physical channel, from ONU one side, the type of the physical channel that ONU connects does not change, therefore, ONU does not need to do larger change, does not need to change oneself state yet, and this physical channel of only need to continuing to continue gets final product.In OLT one side, spare OLT can flexibility ground be the physical channel corresponding to primary OLT of breaking down with own physical channel, not needing namely, does not need 1: 1 protection in the OLT side for each OLT arranges a spare OLT, the saving equipment cost.

Description of drawings

Accompanying drawing described herein is used to provide a further understanding of the present invention, consists of the application's a part, and illustrative examples of the present invention and explanation thereof are used for explaining the present invention, do not consist of improper restriction of the present invention.In the accompanying drawings:

Fig. 1 is the topological structure schematic diagram according to the PDN system of correlation technique;

Fig. 2 a is the topological structure schematic diagram according to the Wave time division mixing PON system of correlation technique;

Fig. 2 b is the topological structure schematic diagram according to the frequency-division and time-division mixing PON system of correlation technique;

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

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

Fig. 5 is the topological diagram according to the mixing PON that comprises spare OLT of correlation technique;

Fig. 6 is the process chart according to the first passage method of adjustment of the embodiment of the invention;

Fig. 7 is the structural representation according to the first passage adjusting device of the embodiment of the invention;

Fig. 8 is the process chart according to the second passage method of adjustment of the embodiment of the invention;

Fig. 9 is the structural representation according to the second passage adjusting device of the embodiment of the invention;

Figure 10 is the process chart according to the third passage method of adjustment of the embodiment of the invention; And

Figure 11 is the structural representation according to the third passage adjusting device of the embodiment of the invention.

Embodiment

Hereinafter also describe in conjunction with the embodiments the present invention in detail with reference to accompanying drawing.Need to prove that in the situation of not conflicting, embodiment and the feature among the embodiment among the application can make up mutually.

Mention in the correlation technique, the problem that existing procedure exists comprises: a series of state transition that each ONU all finishes as shown in Figure 5 makes OLT need bear a large amount of message transmission work, this just causes the prolongation of time of switching, affect the fast quick-recovery proper communication of ONU and OLT, it is substantially consuming time at 100 milliseconds more than the magnitude to make ONU and OLT recover normal operation, can not satisfy the user to the requirement of the fast quick-recovery of network failure.And for realizing that each OLT place of defencive function exists a primary PON mouth and PON mouth for subsequent use, namely the OLT side is 1: 1 protection, has increased equipment cost in the said process.

For solving the problems of the technologies described above; the embodiment of the invention provides multiple passage method of adjustment; for realizing fast passage adjustment on the basis that is implemented in lower equipment cost; and then in follow-up channel application process, realize being responsible to replace fast switching; save switching time; so that soon quick-recovery proper communication between ONU and OLT is satisfied the user to the requirement of the fast quick-recovery of network failure.Now successively multiple passage method of adjustment is described.

The process chart of the first passage method of adjustment that the embodiment of the invention provides sees also Fig. 2, and its idiographic flow comprises that step S602 is to step S604:

Step S602, spare OLT know that active channel corresponding to the first primary OLT breaks down;

Step S604, spare OLT are adjusted into physical channel corresponding to the first primary OLT with the physical channel of self correspondence.

In embodiments of the present invention, existing specially is primary OLT spare OLT for subsequent use, and as any one primary OLT (the first primary OLT) when breaking down, spare OLT directly is adjusted into physical channel corresponding to this primary OLT with the physical channel of self correspondence.This shows, in this example, directly adjusted the type of physical channel, from ONU one side, the type of the physical channel that ONU uses does not change, therefore, ONU does not need to do larger change, does not need to change oneself state yet, and this physical channel of only need to continuing to continue gets final product.In OLT one side, spare OLT can flexibility ground own physical channel is adjusted into the physical channel corresponding to primary OLT of breaking down, not needing namely, does not need 1: 1 protection in the OLT side for each OLT arranges a spare OLT, the saving equipment cost.

The first primary OLT herein only is used to specify a certain specific, primary OLT that active channel breaks down, and OLT self is not produced restriction.

In the flow process shown in Figure 6, step S602 mentions that spare OLT can know that active channel corresponding to the first primary OLT breaks down, and considers the difference of knowing mode, usually can be divided into two kinds, and a kind of is initiatively to know, another is passively to know.The passive mode of knowing is normally received the signalling trouble of at least one primary OLT or network management system transmission by spare OLT, thereby knows that active channel corresponding to the first primary OLT breaks down.And the mode of initiatively knowing knows that normally by the active channel state of each primary OLT of spare OLT active obtaining active channel corresponding to the first primary OLT breaks down.

When adopting active mode to know, spare OLT can initiatively be communicated by letter with other network elements or network management system and be known that concrete, spare OLT and the first primary OLT or network management system communicate, and knows that active channel corresponding to the first primary OLT breaks down.Another mode of initiatively knowing can be directly to measure to know, concrete, when all not having information interaction between spare OLT and each optical network unit ONU, spare OLT is adjusted into physical channel reception upstream data corresponding to each primary OLT successively with the physical channel of oneself, if spare OLT is not received upstream data at the appointed time on physical channel corresponding to certain primary OLT, then spare OLT knows that active channel corresponding to described primary OLT breaks down, for example, spare OLT is adjusted into physical channel corresponding to the first primary OLT with the physical channel of self correspondence, if at the appointed time, the physical channel of spare OLT after adjusting do not receive upstream data, knows that then active channel corresponding to the first primary OLT breaks down.

During enforcement, break down and generally include following reason in the physical channel that primary OLT is corresponding: the transceiver of the first primary OLT breaks down; Perhaps, the optical fiber that connects between the ONU that the first primary OLT is corresponding with it breaks down.

In above preferred embodiment, for ensureing that the PON system can work, spare OLT can utilize poll system successively fault inquiry to be carried out in physical channel corresponding to intrasystem each the primary OLT of PON, finds that in time physical channel corresponding to the first primary OLT break down.Perhaps, preferred, whether spare OLT also can adopt the periodic queries mode, inquire about physical channel corresponding to each primary OLT and break down.Perhaps, whether another preferred mode is used regularly inquiry mode to inquire about physical channel corresponding to each primary OLT and is broken down.Certainly, can also adopt other inquiry mode, can guarantee in time to find that physical channel corresponding to the first primary OLT break down, so that provide alternate channel to get final product.

Flow process as shown in Figure 6, step S604 is after implementing, being spare OLT is adjusted into the physical channel of self correspondence after physical channel corresponding to the first primary OLT, the spare OLT ONU corresponding with the first primary OLT connects, set up the active channel corresponding with spare OLT, and then the business of spare OLT ONU that the first primary OLT is corresponding is switched to active channel corresponding to spare OLT by active channel corresponding to the first primary OLT.That is, spare OLT is that ONU corresponding to the first primary OLT distributes upstream bandwidth at its corresponding active channel, and wherein, each ONU that is assigned with upstream bandwidth sends upstream data in the upstream bandwidth that spare OLT is distributed.Recover professional between ONU and spare OLT.

Flow process as shown in Figure 6, step S602 is before implementing, be before spare OLT knows that active channel corresponding to the first primary OLT breaks down, spare OLT can receive the state information of each primary OLT transmission and store in this locality, wherein, state information comprises passage relevant information and the range finding object information of the ONU of each primary OLT self-management;

Preferably, the passage relevant information usually can comprise following one of at least: the ONU-ID of each ONU, LLID, T-CONT, sequence number information, medium access control address and gigabit method for packing port-mark.

Preferably, the range finding object information comprises: the distance measurement value between spare OLT and each ONU.

When implementing, usually can calculate in the following manner distance measurement value, now be described successively.

First kind of way: spare OLT begin to receive upstream data, and record receives the time of upstream data after the physical channel of self correspondence is adjusted into physical channel corresponding to each primary OLT;

Spare OLT will receive the time announcement of upstream data and give each primary OLT, calculate distance measurement value between spare OLT and each ONU by each primary OLT.

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

Spare OLT begin to receive upstream data, and record receives the time of upstream data after the physical channel of self correspondence is adjusted into physical channel corresponding to each primary OLT;

Spare OLT goes out distance measurement value between self and each ONU according to the Time Calculation of time of obtaining and record.

The second distance measuring method is in implementation process, and spare OLT need to be obtained the time that each primary OLT sends downlink data, and concrete obtain manner is: spare OLT receives the time that sent by each primary OLT, each primary OLT transmission downlink data; Perhaps, spare OLT is monitored the time that each primary OLT sends downlink data.

Adopting first kind of way to obtain distance measurement value, namely calculated after the distance measurement value between spare OLT and each ONU by each primary OLT, the distance measurement value that each primary OLT calculates is also stored in the spare OLT reception; Perhaps, spare OLT and each corresponding ONU receive the distance measurement value that each primary OLT calculates, and store the distance measurement value that each primary OLT calculates by each ONU of correspondence;

Obtain distance measurement value in the employing second way, being spare OLT goes out after the distance measurement value between self and each ONU according to the Time Calculation of obtaining and recording, spare OLT notifies the distance measurement value that calculates to each primary OLT, and by each ONU corresponding to each primary OLT notice, the distance measurement value that is calculated by each ONU storage spare OLT of correspondence.

During enforcement, when each ONU by correspondence stored the distance measurement value that calculates, the distance measurement value of current use can adopt following several different update mode:

The first: each corresponding ONU receives the downlink frame that spare OLT sends, and immediately self is sent the distance measurement value that distance measurement value corresponding to data is updated to storage;

The second: each corresponding ONU receives the order of the renewal distance measurement value of spare OLT transmission, immediately self is sent the distance measurement value that distance measurement value corresponding to data is updated to storage;

The third: each corresponding ONU does not receive downlink frame in Preset Time, then initiatively self is sent the distance measurement value that distance measurement value corresponding to data is updated to storage.

Each corresponding ONU is updated to distance measurement value corresponding to self transmission data after the distance measurement value of storage, and the upstream bandwidth that each corresponding ONU response spare OLT is distributed sends upstream data according to the distance measurement value after upgrading in the upstream bandwidth of distribution.

In above-mentioned preferred embodiment, distance measurement value can be set to following one of arbitrarily: loop time delay value, balanced time delay value and loop time; The physical channel can be set to following one of arbitrarily: wavelength, wavelength are to, subcarrier and subcarrier group.The concrete selective basis concrete condition of parameters and deciding.

For implementing above preferred embodiment, based on same inventive concept, the embodiment of the invention also provides a kind of passage adjusting device, is arranged in the spare OLT, and its structural representation comprises as shown in Figure 3:

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

The first adjusting module 702 is used for the physical channel of self correspondence is adjusted into physical channel corresponding to the first primary OLT.

Based on same inventive concept, the embodiment of the invention also provides another passage method of adjustment, and its particular flow sheet comprises that step S802 is to step S804 as shown in Figure 8:

Step S802, the second primary OLT know that active channel corresponding to the first primary OLT breaks down;

Step S804, the second primary OLT self increases a physical channel, and the physical channel that increases is adjusted into physical channel corresponding to the first primary OLT.

In embodiments of the present invention, there is not the special primary OLT spare OLT for subsequent use that is, as any one primary OLT (the first primary OLT) when breaking down, increase a new physical channel by same the second primary OLT as primary OLT at self, the physical channel that increases is adjusted into physical channel corresponding to the first primary OLT, utilizes the physical channel that increases to provide service for subsequent use for the first primary OLT.This shows, in this example, adjusted the type of the newly-increased physical channel of the second primary OLT, from ONU one side, the physical channel that ONU adopts does not change, therefore, ONU does not need to do larger change, does not need to change oneself state yet, and this physical channel of only need to continuing to continue gets final product.In OLT one side; can be chosen in to flexibility the second primary OLT and increase a physical channel; it is adjusted into the physical channel corresponding to primary OLT of breaking down; realized each other spare OLT of primary OLT; do not need for each OLT a spare OLT to be set; that is, do not need 1: 1 protection in the OLT side, save equipment cost.

The first primary OLT herein only is used to specify a certain specific, primary OLT that active channel breaks down, and the second primary OLT only is used for distinguishing with the first primary OLT, and both all do not produce restriction to OLT self.

In above preferred embodiment, for ensureing that the PON system can work, the second primary OLT can utilize poll system successively fault inquiry to be carried out in physical channel corresponding to intrasystem all the other the primary OLT of PON, finds that in time physical channel corresponding to the first primary OLT break down.Perhaps, preferred, whether the second primary OLT also can adopt the periodic queries mode, inquire about physical channel corresponding to all the other each primary OLT and break down.Perhaps, whether another preferred mode is used regularly inquiry mode to inquire about physical channel corresponding to all the other each primary OLT and is broken down.Certainly, can also adopt other inquiry mode, can guarantee in time to find that physical channel corresponding to the first primary OLT break down, so that provide alternate channel to ensure that the PON normal operation gets final product.

Flow process as shown in Figure 8, step S802 mentions that when implementing the second primary OLT knows that active channel corresponding to the first primary OLT breaks down, and considers the difference of knowing mode, usually can be divided into two kinds, and a kind of is initiatively to know, and another is passively to know.Passively know that mode comprises: the second primary OLT receives the signalling trouble that at least one primary OLT or network management system send, and knows that active channel corresponding to the first primary OLT breaks down; And know that initiatively mode comprises: the active channel state of second primary all the other each primary OLT of OLT active obtaining, know that active channel corresponding to the first primary OLT breaks down.

When adopting active mode to know, the second primary OLT can initiatively communicate by letter with other network elements or network management system and know, concrete, the active channel state of second primary all the other each primary OLT of OLT active obtaining knows that active channel corresponding to the first primary OLT breaks down.Another mode of initiatively knowing can be directly to measure to know, concrete, when all not having information interaction between each optical network unit ONU of the second primary OLT and the first primary OLT management, the second primary OLT physical channel that self is newly-increased is adjusted into physical channel corresponding to the first primary OLT, if at the appointed time, the second primary OLT does not receive upstream data through the physical channel that self increases newly, knows that then active channel corresponding to the first primary OLT breaks down.

During enforcement, active channel corresponding to the first primary OLT breaks down and generally include following reason: the transceiver of the first primary OLT breaks down; Perhaps, the optical fiber that connects between the ONU that the first primary OLT is corresponding with it breaks down.

Flow process as shown in Figure 8, step S804 is after implementing, namely the second primary OLT is adjusted into the physical channel that increases after physical channel corresponding to the first primary OLT, the ONU that the second primary OLT is corresponding with the first primary OLT connects, set up the active channel corresponding with the second primary OLT, and then the business of the second primary OLT ONU that the first primary OLT is corresponding is switched the corresponding active channel to the second primary OLT by active channel corresponding to the first primary OLT.That is, the second primary OLT is that ONU corresponding to the first primary OLT distributes upstream bandwidth at its corresponding active channel, and wherein, each ONU that is assigned with upstream bandwidth sends upstream data in the upstream bandwidth that the second primary OLT distributes.Recover professional between ONU and spare OLT.

Flow process as shown in Figure 8, step S802 is before implementing, before namely the second primary OLT knows that active channel corresponding to the first primary OLT breaks down, the second primary OLT receives the state information of all the other each primary OLT transmissions and stores in this locality, wherein, state information comprises passage relevant information and the range finding object information of the ONU of all the other each primary OLT self-managements

First kind of way: after the second primary OLT physical channel that self is newly-increased is adjusted into physical channel corresponding to all the other each primary OLT, begin to receive upstream data, and record receives the time of upstream data;

The second primary OLT will receive the time announcement of upstream data and give all the other each primary OLT, calculate distance measurement value between the second primary OLT and each ONU by all the other each primary OLT.

The second way: the second primary OLT obtains the time that all the other each primary OLT send downlink data;

After the second primary OLT physical channel that self is newly-increased is adjusted into physical channel corresponding to all the other each primary OLT, begin to receive upstream data, and record receives the time of upstream data;

The second primary OLT goes out distance measurement value between self and each ONU according to the Time Calculation of the time of obtaining and record.

The second distance measuring method is in implementation process, the second primary OLT need to obtain the time that each primary OLT sends downlink data, and concrete obtain manner is: the second primary OLT receives the times that sent by all the other each primary OLT, all the other each primary OLT transmission downlink datas; Perhaps, the second primary OLT monitors the time that all the other each primary OLT send downlink data.

Adopting first kind of way to obtain distance measurement value, namely calculated after the distance measurement value between the second primary OLT and each ONU by all the other each primary OLT, the distance measurement value that all the other each primary OLT calculate is also stored in the second primary OLT reception; Perhaps, the second primary OLT and each corresponding ONU receive the distance measurement value that all the other each primary OLT calculate, and store the distance measurement value that all the other each primary OLT calculate by each ONU of correspondence;

Obtain distance measurement value in the employing second way, namely the second primary OLT goes out after the distance measurement value between self and each ONU according to the Time Calculation of obtaining and recording, the second primary OLT notifies the distance measurement value that calculates to all the other each primary OLT, and by each ONU corresponding to all the other primary OLT notices, store the distance measurement value that the second primary OLT calculates by each ONU of correspondence.

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

The second: each corresponding ONU receives the order of the renewal distance measurement value of the second primary OLT transmission, immediately self is sent the distance measurement value that distance measurement value corresponding to data is updated to storage;

Each corresponding ONU is updated to distance measurement value corresponding to self transmission data after the distance measurement value of storage, and each corresponding ONU responds the upstream bandwidth that the second primary OLT distributes, and sends upstream data according to the distance measurement value after upgrading in the upstream bandwidth that distributes.

For implementing above preferred embodiment, based on same inventive concept, the embodiment of the invention also provides a kind of passage adjusting device, is arranged among the second primary OLT, and its structural representation comprises as shown in Figure 9:

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

The second adjusting module 902 is used for increasing a physical channel at the second primary OLT, and the physical channel that increases is adjusted into physical channel corresponding to the first primary OLT.

Based on same inventive concept, the embodiment of the invention also provides another passage method of adjustment, and its particular flow sheet comprises as shown in figure 10:

Step S1002, ONU judge whether receive downlink data in Preset Time;

If step S1004 is when the determination result is NO, then ONU is adjusted into the appointment physical channel of not breaking down with the physical channel of self.

In embodiments of the present invention, with the main body of ONU as operation, if ONU does not receive downlink data in Preset Time, judge that then the active channel that self connects breaks down, self physical channel is adjusted into the appointment physical channel of not breaking down.In OLT one side; it does not need to specify is that the passage that is connected with spare OLT refers to earnest reason passage; do not limit its physical channel that is connected with primary OLT yet and refer to earnest reason passage; increased the scope of selecting; do not need for each OLT a spare OLT to be set; that is, do not need 1: 1 protection in the OLT side, save equipment cost.

In a preferred embodiment, specify the physical channel can comprise the physical channel that spare OLT transmission and receive data use, can comprise other transmission of the first primary OLT use and the physical channel of receive data, wherein, the first primary OLT is primary OLT corresponding to this ONU, can also comprise other physical channels that primary OLT transmits and receive data uses in the PON system (comprising physical channel and the newly-increased physical channel of having used), wherein, other primary OLT and the first primary OLT are different primary OLT.Certainly, specify the physical channel also may through the physical channel that third party (non-OLT) provides, can realize that transmission and receive data get final product.

During enforcement, ONU can carry out adjusting operation according to s own situation, also can carry out adjusting operation according to the instruction that OLT sends, and according to the difference of specifying the physical channel, now enumerates several examples, is explained.

Example A, after the physical channel that spare OLT is used self transmission and receive data is adjusted into physical channel corresponding to this ONU, this ONU receives the adjustment notice that spare OLT sends, the physical channel of self is adjusted into the physical channel that spare OLT is transmitted and receive data uses, when perhaps ONU receives the adjustment notice of spare OLT transmission, the physical channel of self is adjusted into other transmission of the first primary OLT use and the physical channel of receive data, perhaps ONU receives the adjustment notice that spare OLT sends, and self physical channel is adjusted into other primary OLT uses or newly-increased physical channel;

Example B, other transmission that the first primary OLT uses self and the physical channel of receive data are adjusted into after physical channel corresponding to this ONU, this ONU receives the adjustment notice that the first primary OLT sends, the physical channel of self is adjusted into other transmission of the first primary OLT use and the physical channel of receive data, perhaps ONU receives the adjustment notice that the first primary OLT sends, the physical channel of self is adjusted into the physical channel that spare OLT is transmitted and receive data uses, perhaps ONU receives the adjustment notice that the first primary OLT sends, and self physical channel is adjusted into other primary OLT uses or newly-increased physical channel;

Example C, other primary OLT will use or newly-increased physical channel is adjusted into after physical channel corresponding to this ONU, ONU receives the adjustment notice that other primary OLT initiate, the physical channel of self is adjusted into the physical channel that other primary OLT use or increase newly, perhaps ONU receives the adjustment notice that other primary OLT initiate, the physical channel of self is adjusted into the physical channel that spare OLT is transmitted and receive data uses, perhaps ONU receives the adjustment notice that other primary OLT initiate, and self physical channel is adjusted into other transmission that the first primary OLT uses and the physical channel of receive data.

Flow process as shown in figure 10, after the step S1004, namely ONU adjusts to the physical channel of self and specifies after the physical channel, and ONU will send the distance measurement value that distance measurement value that data use is updated to corresponding appointment physical channel.

In the present embodiment, ONU need to upgrade distance measurement value, and then before upgrading, ONU will inevitably obtain the distance measurement value after the renewal.Its corresponding obtain manner comprises: ONU re-starts range finding, the distance measurement value after obtaining to upgrade; Perhaps ONU receives the distance measurement value of each primary OLT or spare OLT transmission, with its distance measurement value as the active channel of the OLT of correspondence transmission distance measurement value.

During enforcement, be spare OLT when transmitting and receive data the physical channel of using when specifying the physical channel, distance measurement value can calculate as follows:

During enforcement, be the physical channel that the second primary OLT is connected with ONU when specifying the physical channel, distance measurement value can calculate as follows:

For implementing above preferred embodiment, based on same inventive concept, the embodiment of the invention also provides a kind of passage adjusting device, is arranged among the ONU, and its structural representation comprises as shown in figure 11:

Judge module 1101 is used for judging whether receive downlink data in Preset Time;

The 3rd adjusting module 1102 is if when being used for judge module 1101 the determination result is NO, then the physical channel with self is adjusted into the appointment physical channel of not breaking down.

Clearer clearer for the embodiment of the invention being set forth ground, now be described with specific embodiment.

Example one (GPON mechanism)

In mixing PON, primary OLT in each work manages one group of ONU, when spare OLT and ONU do not have information interaction, according to the order of other in running order primary OLT to the ONU of the primary OLT management stand-by channel range finding (also can be that spare OLT notifies primary OLT oneself need to the ONU of primary OLT management be found range at the stand-by channel of corresponding spare OLT among the embodiment at other) in corresponding spare OLT.

Ranging process is as follows: spare OLT is set to the wavelength (also can be subcarrier or subcarrier group in other embodiments) of the receive data of oneself wavelength (also can be subcarrier or subcarrier group in other embodiments) of above-mentioned work OLT receive data.Primary OLT is with the passage relevant information of self-administered all ONU such as the ONU-ID of ONU, T-CONT, sequence number information, gigabit method for packing port-mark and all ONU send to spare OLT at the balanced time delay value (EqD) of master channel, spare OLT and primary OLT retention time are synchronous, spare OLT is monitored primary OLT and is sent downlink frame to ONU, and record sends the time T 1 of downlink frame and the time (StartTime) that primary OLT allows ONU transmission uplink frame, (also can be that primary OLT sends to spare OLT with T1 and StartTime value in other embodiment), after ONU receives distance measurement request, the EqD that waits for self correspondence (also can find range to the ONU of registration state of activation in other embodiment, this moment ONU place do not store EqD between, change value between this into random delay value) time and the StartTime of distance measurement request distribution after reply ranging response.Spare OLT is monitored the time of reception T2 that primary OLT receives the uplink frame that ONU sends (also can be primary OLT the value of T2 is sent to spare OLT) in other embodiment, spare OLT records the value of above-mentioned T2, and record time of reception T3 when oneself receiving the uplink frame that ONU sends, spare OLT calculates that EqD value EqD between own and this ONU is for subsequent use to be:

EqD is for subsequent use=and EqDmax is for subsequent use-(T2-T1)+EqD+StartTime-(1+i descending/i is up) * (T3-T2)

Wherein, EqDmax is for subsequent use to be the maximum EqD value of alternate channel, the time value of the EqD EqD that to be in running order ONU record at master channel, the refractive index of the up light of the upper behavior of i in optical fiber, the refractive index of the descending light of behavior in optical fiber under the i.

An ONU of spare OLT acquisition work OLT management is behind the EqD of stand-by channel backed-up value, difference Δ=the EqD of EqD that obtains this ONU and primary path for subsequent use at the EqD of stand-by channel is for subsequent use-EqD, according to above-mentioned Δ, can obtain all ONU of this work OLT management at stand-by channel EqD backed-up value, its the value for the EqD of primary path value and above-mentioned Δ value with, namely EqD for subsequent use=the EqD+ Δ.

Spare OLT sends to primary OLT with EqD is for subsequent use, and primary OLT sends to corresponding ONU with above-mentioned EqD is for subsequent use.ONU stores this EqD value for subsequent use.

Spare OLT and ONU between when not having information interaction, the wavelength (also can be subcarrier or subcarrier group in other embodiments) that spare OLT will receive upstream data is adjusted into the rear upstream data that receives of wavelength (also can be subcarrier or subcarrier group in other embodiments) that other primary OLT receive upstream data, in between predetermined, after spare OLT is received upstream data, the wavelength (also can be subcarrier or subcarrier group in other embodiments) that continuation will receive upstream data is adjusted into the rear upstream data that receives of wavelength (also can be subcarrier or subcarrier group in other embodiments) that another primary OLT receives upstream data, and spare OLT repeats said process.After being adjusted into the wavelength (also can be subcarrier or subcarrier group in other embodiments) that certain primary OLT receives upstream data, wavelength (yet can be subcarrier or subcarrier group in other embodiments) that spare OLT will receive upstream data within a period of time, do not receive upstream data, then spare OLT judges that (perhaps spare OLT is not received upstream data to active channel cisco unity malfunction corresponding to certain OLT within a period of time, whether can work) if then obtaining its corresponding active channel with corresponding primary OLT communication, if during the spare OLT active channel cisco unity malfunction that definite certain primary OLT is corresponding by the way, the wavelength (also can be subcarrier or subcarrier group in other embodiments) that spare OLT will receive upstream data is adjusted into the wavelength (also can be subcarrier or subcarrier group in other embodiments) that this primary OLT receives upstream data, and the wavelength (also can be subcarrier or subcarrier group in other embodiments) that will send downlink data is adjusted into the wavelength (also can be subcarrier or subcarrier group in other embodiments) that this primary OLT sends downlink data, spare OLT is given the distribution upstream bandwidth of the ONU of this primary OLT management based on T-CONT, after ONU receives the downlink frame of spare OLT, the EqD value of upgrading oneself according to the identity information of spare OLT is the EqD value of stand-by channel, the upstream bandwidth that ONU response spare OLT is distributed, the EqD corresponding according to the stand-by channel after the renewal sends upstream data in spare OLT is given the upstream bandwidth that oneself distributes.

ONU is the EqD value of stand-by channel according to the EqD value of the identity information renewal oneself of spare OLT in the present embodiment, after in other embodiment, also can adopting the order of the renewal distance measurement value that spare OLT sends, immediately distance measurement value corresponding to own transmission data is updated to the distance measurement value of stand-by channel; After perhaps ONU does not receive downlink frame within a period of time, initiatively oneself is sent the distance measurement value that distance measurement value corresponding to data is updated to stand-by channel.

In the present embodiment, OLT by different wavelengths (in the other embodiments may also be subcarrier or subcarrier group) to receive uplink data, confirm that the wavelength corresponding to the working path is working properly; in other embodiments, the can also be used to work OLT, at its corresponding working path is not working properly, inform the standby OLT to receive data and transmit data to the wavelength (in the other embodiments may also be subcarrier or subcarrier group) when adjusted to the corresponding the wavelength (in other embodiments the sub-carrier can be one or sub-carrier group) instead of their own for communication with the corresponding ONU.

That spare OLT is finished the calculating to ranging process in the present embodiment, the physical channel that also can adopt spare OLT will receive upstream data in other embodiment receives upstream data after being adjusted into the physical channel that other OLT receive upstream datas, and record receives the time of upstream data, spare OLT will receive the time announcement of upstream data to other OLT, also notified to spare OLT by the distance measurement value that other OLT calculate between spare OLT and the ONU, spare OLT is stored above-mentioned distance measurement value; Perhaps notify to spare OLT and ONU, ONU stores distance measurement value for subsequent use.

Spare OLT has one group of Receiver And Transmitter in the present embodiment, can there be a plurality of Receiver And Transmitters at the OLT place in other embodiment, and the method for work of one group of Receiver And Transmitter of the spare OLT in the method for work of every group of receiver and tunable transmitter and the present embodiment is identical.

Example two (EPON mechanism)

In mixing PON as shown in Figure 5, primary OLT in each work manages one group of ONU, when spare OLT and ONU do not have information interaction, according to the order of other in running order primary OLT to the ONU of the primary OLT management stand-by channel range finding (also can be that spare OLT notifies primary OLT oneself need to the ONU of primary OLT management be found range at the stand-by channel of corresponding spare OLT among the embodiment at other) in corresponding spare OLT.Ranging process is as follows: spare OLT is set to the wavelength (also can be subcarrier or subcarrier group in other embodiments) of the receive data of oneself wavelength (also can be subcarrier or subcarrier group in other embodiments) of above-mentioned work OLT receive data.Primary OLT is with the passage relevant information of self-administered all ONU such as the LLID of ONU, medium access control address and all ONU are at balanced time delay value loop time (the Round Trip Time of master channel, abbreviation RTT) sends to spare OLT, spare OLT and primary OLT retention time are synchronous, spare OLT is monitored primary OLT and is sent downlink frame to ONU, and record sends the time T 0 (also can be that primary OLT sends to spare OLT with the T0 value) of downlink frame in other embodiment, after ONU receives distance measurement request, be T0 with the time stamp setting of oneself, reply ranging response in time T 1.Spare OLT is monitored the time of reception T2 that primary OLT receives the uplink frame that ONU sends (also can be primary OLT the value of T2 is sent to spare OLT) in other embodiment, spare OLT records the value of above-mentioned T2, and record time of reception T2 ' when oneself receiving the uplink frame that ONU sends, the RTT value that spare OLT is calculated between own and this ONU is:

RTT is for subsequent use=2 * T2 '-T1-T2

An ONU of spare OLT acquisition work OLT management is after the RTT of stand-by channel value, difference Δ=the RTT of RTT that obtains this ONU and primary path for subsequent use at the RTT of stand-by channel is for subsequent use-RTT, according to above-mentioned Δ, can obtain all ONU of this work OLT management at stand-by channel RTT backed-up value, its the value for the RTT of primary path value and above-mentioned Δ value with, namely RTT for subsequent use=the RTT+ Δ.Spare OLT is stored above-mentioned EqD value for subsequent use.

Spare OLT and ONU between when not having information interaction, the wavelength (also can be subcarrier or subcarrier group in other embodiments) that spare OLT will receive upstream data is adjusted into the rear upstream data that receives of wavelength (also can be subcarrier or subcarrier group in other embodiments) that other primary OLT receive upstream data, after spare OLT is received upstream data, the wavelength (also can be subcarrier or subcarrier group in other embodiments) that continuation will receive upstream data is adjusted into the rear upstream data that receives of wavelength (also can be subcarrier or subcarrier group in other embodiments) that another primary OLT receives upstream data, and spare OLT repeats said process.After being adjusted into the wavelength (also can be subcarrier or subcarrier group in other embodiments) that certain primary OLT receives upstream data, wavelength (yet can be subcarrier or subcarrier group in other embodiments) that spare OLT will receive upstream data within a period of time, do not receive upstream data, then spare OLT judges that (perhaps spare OLT is not received upstream data to active channel cisco unity malfunction corresponding to certain OLT within a period of time, whether can work) if then obtaining its corresponding active channel with corresponding primary OLT communication, if during the spare OLT active channel cisco unity malfunction that definite certain primary OLT is corresponding by the way, the wavelength (also can be subcarrier or subcarrier group in other embodiments) that spare OLT will receive upstream data is adjusted into the wavelength (also can be subcarrier or subcarrier group in other embodiments) that this primary OLT receives upstream data, and the wavelength (also can be subcarrier or subcarrier group in other embodiments) that will send downlink data is adjusted into the wavelength (also can be subcarrier or subcarrier group in other embodiments) that this primary OLT sends downlink data, spare OLT is given the distribution upstream bandwidth of the ONU of this primary OLT management based on LLID and ONU at the RTT of stand-by channel, and ONU sends upstream data in spare OLT is given the upstream bandwidth of own distribution.

In the present embodiment, the OLT by different wavelengths (in the other embodiments may also be subcarrier or subcarrier group) to receive uplink data to confirm the wavelength corresponding to the working path is working, in other embodiments also OLT can work at its corresponding working path is not working properly, inform the standby OLT to receive data and transmit data to the wavelength (in the other embodiments may also be subcarrier or subcarrier group) when adjusted to a wavelength corresponding to (in other embodiments, the sub-carrier can be one or sub-carrier group) instead of their own for communication with the corresponding ONU.

That spare OLT is finished the calculating to ranging process in the present embodiment, the physical channel that also can adopt spare OLT will receive upstream data in other embodiment receives upstream data after being adjusted into the physical channel that other OLT receive upstream datas, and record receives the time of upstream data, spare OLT will receive the time announcement of upstream data to other OLT, also notified to spare OLT by the distance measurement value that other OLT calculate between spare OLT and the ONU, spare OLT is stored above-mentioned distance measurement value.

As can be seen from the above description, the present invention has realized following technique effect:

In embodiments of the present invention, existing specially is primary OLT spare OLT for subsequent use, as any one primary OLT (the first primary OLT) when breaking down, spare OLT directly is adjusted into this physical channel corresponding to the first primary OLT with the physical channel of self correspondence.This shows, in this example, directly adjusted the type of physical channel, from ONU one side, the type of the physical channel that ONU connects does not change, therefore, ONU does not need to do larger change, does not need to change oneself state yet, and this physical channel of only need to continuing to continue gets final product.In OLT one side, spare OLT can flexibility ground own physical channel is adjusted into the physical channel corresponding to primary OLT of breaking down, not needing namely, does not need 1: 1 protection in the OLT side for each OLT arranges a spare OLT, the saving equipment cost.

In embodiments of the present invention, there is not the special primary OLT spare OLT for subsequent use that is, as any one primary OLT (the first primary OLT) when breaking down, increase a new physical channel by same the second primary OLT as primary OLT at self, the physical channel that increases is adjusted into physical channel corresponding to the first primary OLT, utilizes the physical channel that increases to provide service for subsequent use for the first primary OLT.This shows, in this example, adjusted the type of the newly-increased physical channel of the second primary OLT, from ONU one side, the type of the physical channel that ONU connects does not change, and therefore, ONU does not need to do larger change, also do not need to change oneself state, this physical channel of only need to continuing to continue gets final product.In OLT one side; can be chosen in to flexibility the second primary OLT and increase a physical channel; it is adjusted into the physical channel corresponding to primary OLT of breaking down; realized each other spare OLT of primary OLT; do not need for each OLT a spare OLT to be set; that is, do not need 1: 1 protection in the OLT side, save equipment cost.

In embodiments of the present invention, with the main body of ONU as operation, if ONU does not receive downlink data in Preset Time, judge that then the active channel that self connects breaks down, self physical channel is adjusted into the appointment physical channel of not breaking down.This shows; in this example; in OLT one side; it does not need to specify is that the passage that is connected with spare OLT refers to earnest reason passage, does not also limit its physical channel that is connected with primary OLT and refers to earnest reason passage, has increased the scope of selecting; do not need for each OLT a spare OLT to be set; that is, do not need 1: 1 protection in the OLT side, save equipment cost.

Obviously, those skilled in the art should be understood that, above-mentioned each module of the present invention or each step can realize with general calculation element, they can concentrate on the single calculation element, perhaps be distributed on the network that a plurality of calculation elements form, alternatively, they can be realized with the executable program code of calculation element, thereby, they can be stored in the storage device and be carried out by calculation element, and in some cases, can carry out step shown or that describe with the order that is different from herein, perhaps they are made into respectively each integrated circuit modules, perhaps a plurality of modules in them or step are made into the single integrated circuit module and realize.Like this, the present invention is not restricted to any specific hardware and software combination.

The above is the preferred embodiments of the present invention only, is not limited to the present invention, and for a person skilled in the art, the present invention can have various modifications and variations.Within the spirit and principles in the present invention all, any modification of doing, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.

Claims

1. a passage method of adjustment is characterized in that, comprising:

Optical line terminal OLT for subsequent use knows that active channel corresponding to the first primary OLT breaks down;

Described spare OLT is adjusted into physical channel corresponding to the described first primary OLT with the physical channel of self correspondence.

2. method according to claim 1 is characterized in that, described spare OLT knows that active channel corresponding to the described first primary OLT breaks down, and comprising:

Described spare OLT receives the signalling trouble of at least one primary OLT or network management system transmission, knows that active channel corresponding to the described first primary OLT breaks down; Perhaps

The active channel state of described each primary OLT of spare OLT active obtaining knows that active channel corresponding to the described first primary OLT breaks down.

3. method according to claim 2 is characterized in that, the active channel state of described each primary OLT of spare OLT active obtaining knows that active channel corresponding to the described first primary OLT breaks down, and comprising:

When all not having information interaction between described spare OLT and each optical network unit ONU, described spare OLT is adjusted into physical channel corresponding to the described first primary OLT with the physical channel of self correspondence, if at the appointed time, the physical channel of described spare OLT after adjusting do not receive upstream data, knows that then active channel corresponding to the described first primary OLT breaks down; Perhaps

Described spare OLT and the described first primary OLT or described network management system communicate, and know that active channel corresponding to the described first primary OLT breaks down.

4. method according to claim 1 is characterized in that, described spare OLT is adjusted into the physical channel of self correspondence after physical channel corresponding to the described first primary OLT, also comprises:

The described spare OLT ONU corresponding with the described first primary OLT connects, and sets up the active channel corresponding with described spare OLT;

The business of the ONU that described spare OLT is corresponding with the described first primary OLT is switched to active channel corresponding to described spare OLT by active channel corresponding to the described first primary OLT.

5. method according to claim 1 is characterized in that, described spare OLT comprises before knowing that active channel corresponding to the first primary OLT breaks down:

Described spare OLT receives the state information that each primary OLT sends, and wherein, described state information comprises passage relevant information and the range finding object information of the ONU of each primary OLT self-management;

Described spare OLT is stored described state information.

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

Described passage relevant information comprise following one of at least: the sign ONU-ID of each ONU, logical links label L LID, transmission container T-CONT, sequence number information, medium access control address and gigabit method for packing port-mark;

Described range finding object information comprises: the distance measurement value between described spare OLT and each ONU.

7. method according to claim 6 is characterized in that, when each ONU corresponding to described spare OLT stores described distance measurement value,

Each ONU of described correspondence receives the downlink frame that described spare OLT sends, and immediately self is sent the distance measurement value that distance measurement value corresponding to data is updated to storage; Perhaps

Each ONU of described correspondence receives the order of the renewal distance measurement value of described spare OLT transmission, immediately self is sent the distance measurement value that distance measurement value corresponding to data is updated to storage; Perhaps

Each ONU of described correspondence does not receive downlink frame in Preset Time, then initiatively self is sent the distance measurement value that distance measurement value corresponding to data is updated to storage.

8. according to claim 6 or 7 described methods, it is characterized in that, described distance measurement value be following one of arbitrarily: loop time delay value, balanced time delay value and loop time.

9. according to claim 1 to 7 each described methods, it is characterized in that, described physical channel be following one of arbitrarily: wavelength, wavelength are to, subcarrier and subcarrier group.

10. a passage method of adjustment is characterized in that, comprising:

The second primary optical line terminal OLT knows that active channel corresponding to the first primary OLT breaks down;

The described second primary OLT self increases a physical channel, and the physical channel that increases is adjusted into physical channel corresponding to the described first primary OLT.

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

The described second primary OLT receives the signalling trouble of at least one primary OLT or network management system transmission, knows that active channel corresponding to the described first primary OLT breaks down; Perhaps

The active channel state of described second primary all the other each primary OLT of OLT active obtaining knows that active channel corresponding to the described first primary OLT breaks down.

12. method according to claim 11 is characterized in that, the active channel state of described second primary all the other each primary OLT of OLT active obtaining knows that active channel corresponding to the described first primary OLT breaks down, and comprising:

When all not having information interaction between each optical network unit ONU of the described second primary OLT and the described first primary OLT management, the described second primary OLT physical channel that self is newly-increased is adjusted into physical channel corresponding to the described first primary OLT, if at the appointed time, the described second primary OLT does not receive upstream data through the physical channel that self increases newly, knows that then active channel corresponding to the described first primary OLT breaks down; Perhaps

The described second primary OLT and the described first primary OLT or described network management system communicate, and know that active channel corresponding to the described first primary OLT breaks down.

13. method according to claim 10 is characterized in that, the described second primary OLT comprises before knowing that active channel corresponding to the first primary OLT breaks down:

The described second primary OLT receives the state information that all the other each primary OLT send, and wherein, described state information comprises passage relevant information and the range finding object information of the ONU of all the other each primary OLT self-managements;

The described second primary OLT stores described state information;

Wherein, described passage relevant information comprise following one of at least: the sign ONU-ID of each ONU, logical links label L LID, transmission container T-CONT, sequence number information, medium access control address and gigabit method for packing port-mark;

Described range finding object information comprises: the distance measurement value between the described second primary OLT and each ONU.

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

Each ONU of described correspondence receives the downlink frame that the described second primary OLT sends, and immediately self is sent the distance measurement value that distance measurement value corresponding to data is updated to storage; Perhaps

Each ONU of described correspondence receives the order of the renewal distance measurement value of the described second primary OLT transmission, immediately self is sent the distance measurement value that distance measurement value corresponding to data is updated to storage; Perhaps

15. according to claim 13 or 14 described methods, it is characterized in that, described distance measurement value be following one of arbitrarily: loop time delay value, balanced time delay value and loop time.

16. to 14 each described methods, it is characterized in that according to claim 10, described physical channel be following one of arbitrarily: wavelength, wavelength are to, subcarrier and subcarrier group.

17. a passage method of adjustment is characterized in that, comprising:

Optical network unit ONU judges whether receive downlink data in Preset Time;

When if the determination result is NO, then described ONU is adjusted into non-appointment physical channel of breaking down with the physical channel of self.

18. method according to claim 17 is characterized in that, described appointment physical channel comprises:

The physical channel that optical line terminal OLT transmission for subsequent use and receive data use; Perhaps

Other transmission that the first primary OLT uses and the physical channel of receive data, wherein, the described first primary OLT is primary OLT corresponding to described ONU; Perhaps

The primary OLT of in the passive optical network PON system other uses or newly-increased physical channel, and wherein, described other primary OLT and the described first primary OLT are different primary OLT.

19. method according to claim 17 is characterized in that, described ONU is adjusted into non-appointment physical channel of breaking down with the physical channel of self, comprising:

After the physical channel that spare OLT is used self transmission and receive data is adjusted into physical channel corresponding to described ONU, described ONU receives the adjustment notice that described spare OLT sends, the physical channel of self is adjusted into the physical channel that described spare OLT is transmitted and receive data uses, perhaps described ONU receives the adjustment notice that described spare OLT sends, the physical channel of self is adjusted into other transmission of the described first primary OLT use and the physical channel of receive data, perhaps described ONU receives the adjustment notice that described spare OLT sends, and self physical channel is adjusted into described other primary OLT uses or newly-increased physical channels;

Other transmission that the described first primary OLT uses self and the physical channel of receive data are adjusted into after physical channel corresponding to described ONU, described ONU receives the adjustment notice that the described first primary OLT sends, the physical channel of self is adjusted into other transmission of the described first primary OLT use and the physical channel of receive data, perhaps described ONU receives the adjustment notice that the described first primary OLT sends, the physical channel of self is adjusted into the physical channel that described spare OLT is transmitted and receive data uses, perhaps described ONU receives the adjustment notice that the described first primary OLT sends, and self physical channel is adjusted into described other primary OLT uses or newly-increased physical channels; Described other primary OLT will use or newly-increased physical channel is adjusted into after physical channel corresponding to described ONU, described ONU receives the adjustment notice that described other primary OLT initiate, the physical channel of self is adjusted into the physical channel that described other primary OLT use or increase newly, perhaps described ONU receives the adjustment notice that described other primary OLT initiate, the physical channel of self is adjusted into the physical channel that described spare OLT is transmitted and receive data uses, perhaps described ONU receives the adjustment notice that described other primary OLT initiate, and self physical channel is adjusted into other transmission that the described first primary OLT uses and the physical channel of receive data.

20. to 19 each described methods, it is characterized in that according to claim 17,

Described ONU adjusts to the physical channel of self after the appointment physical channel of not breaking down, and comprising: described ONU will send the distance measurement value that distance measurement value that data use is updated to corresponding described appointment physical channel;

The distance measurement value that described ONU will send the data use is updated to before the distance measurement value of corresponding described appointment physical channel, and comprising: described ONU re-starts range finding, the distance measurement value after obtaining to upgrade; Perhaps, described ONU receives the distance measurement value of each primary OLT or the transmission of described spare OLT, with its distance measurement value as the active channel of the OLT of correspondence transmission distance measurement value.

21. a passage adjusting device is characterized in that, is arranged in the optical line terminal OLT for subsequent use, comprising:

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

The first adjusting module is used for the physical channel of self correspondence is adjusted into physical channel corresponding to the described first primary OLT.

22. a passage adjusting device is characterized in that, is arranged among the second primary OLT that does not break down, and comprising:

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

The second adjusting module is used for increasing a physical channel at the described second primary OLT, and the physical channel that increases is adjusted into physical channel corresponding to the described first primary OLT.

23. a passage adjusting device is characterized in that, is arranged in the optical network unit ONU, comprising:

Judge module is used for judging whether receive downlink data in Preset Time;

The 3rd adjusting module is if when being used for described judge module the determination result is NO, then the physical channel with self is adjusted into the appointment physical channel of not breaking down.