CN106488345A

CN106488345A - A kind of data transmission method, device, system and ONU, OLT

Info

Publication number: CN106488345A
Application number: CN201510522203.1A
Authority: CN
Inventors: 张伟良; 耿丹
Original assignee: ZTE Corp
Current assignee: ZTE Corp
Priority date: 2015-08-24
Filing date: 2015-08-24
Publication date: 2017-03-08
Anticipated expiration: 2035-08-24
Also published as: CN106488345B; WO2017032162A1

Abstract

The present invention provides a kind of data transmission method, device, system and ONU, OLT, and this data transmission method includes：Optical network unit ONU transmits the information interacting with optical line terminal OLT in any one or more transmission path in many transmission paths；Wherein said information at least includes one of log-on message, ranging information, bandwidth allocation data business information.The method data can be defeated in the upload of many transmission paths, and described many transmission paths are separate, and data transmission path in transmitting procedure is optional, thus lifting the bandwidth between OLT and ONU, increased the network capacity of EPON.

Description

A kind of data transmission method, device, system and ONU, OLT

Technical field

The present invention relates to EPON field, particularly to a kind of data transmission method, device, system and ONU、OLT.

Background technology

With the fast development of broadband services, user increases substantially to the demand of access network bandwidth, PON (Passive Optical Network, EPON) is a kind of important technical that current user accesses, As shown in figure 1, in PON system, OLT is connected with optical branching device by trunk optical fiber, optical branching device leads to Cross branch optical fiber to be connected with multiple ONU, OLT and ONU passes through wavelength to communicating, OLT Downstream wavelength opens peace and quiet window and asks the identity information of ONU, ONU reports in upstream wavelength Identity information, after OLT obtains the identity information of ONU, opens peace and quiet window simultaneously again in downstream wavelength Send distance measurement request, ONU replies ranging response in upstream wavelength, OLT completes range finding, OLT according to Downlink business situation sends data to ONU, and according to the uplink service situation of ONU or the band of ONU Width is asked as ONU distribution bandwidth, and ONU sends upstream data in the bandwidth distributing to oneself.Traditional PON technology such as GPON (Gigabit PON, Gigabit Passive Optical Network), EPON (Ethernet PON, Ethernet PON), XG-PON1 (10 Gigabit PON), 10GEPON (10Gbps EPON) adopt With TDM (Time Division Multiplexing, time division multiplex)/TDMA (Time Division Multiplexing Access, time division multiplex accesses) technology, it is TDM-PON (Time Division Multiplexing PON, time division multiplex PON), but single wavelength speed is difficult to after reaching 10Gbps again Lifting, the lifting of current PON broadband has several developing direction, and one is OFDM-PON (Orthogonal Frequency Division Multiplexing PON, OFDM PON), skill is modulated using wavelength Art, lifts Single wavelength bandwidth, but implementation complexity is higher, there is device and realizes difficulty, and cost is relatively Height, two is TWDM-PON (TDM＆WDM PON, Time Division Multiplexing＆ Wavelength Division Multiplexing PON, time division multiplex wavelength-division multiplex mixing PON), OLT side Increase wavelength dimension, each ONU can only operate on a wavelength, but device complexity is high and disposes More difficult.

How by simple and effective means, the rapid PON capacity that improves is problem demanding prompt solution.

Content of the invention

It is an object of the invention to provide a kind of data transmission method, device, system and ONU, OLT, Solve the network capacity issues of EPON.

To achieve these goals, the embodiment of the present invention provides a kind of data transmission method, is applied to optical-fiber network Unit ONU, ONU is communicated to connect with optical line terminal OLT on many transmission paths, including：

Described ONU transmits to enter with OLT in any one or more transmission path in many transmission paths The information of the interaction of row；Wherein said information at least includes log-on message, ranging information, bandwidth allocation sum According to one of business information.

Wherein, described ONU in any one or more transmission path in a plurality of transmission path with The log-on message that OLT interacts includes：

Described ONU obtains and responds any one or more transmission in many transmission paths for the described OLT The identity request information of the ONU sending in open quiet window on path, and in many transmission paths Any one or more transmission path on to described OLT send ONU identity information.

Wherein, described ONU transmit in any one or more transmission path in many transmission paths with The ranging information that described OLT interacts includes：

Described ONU obtains and responds any one or more transmission in many transmission paths for the described OLT The distance measurement request sending in open quiet window on path, and according to ONU in many transmission paths The ranging response replied in any one or more transmission path obtains the range measurement that described OLT completes.

Wherein, described ONU in any one or more transmission path in many transmission paths with described OLT carries out bandwidth allocation and includes：

Described ONU obtains the bandwidth of the uplink service according to described ONU for the described OLT or described ONU Band that is asking and determine and being distributed by any one or more transmission path in many transmission paths Wide allocation result.

Wherein, described ONU transmit in any one or more transmission path in many transmission paths with The data traffic information that described OLT interacts includes：

Described ONU is according to described bandwidth allocation result, any one or more in many transmission paths Upstream data service is transmitted on transmission path.

Wherein, described ONU transmit in any one or more transmission path in many transmission paths with The data traffic information that described OLT interacts also includes：

Described ONU receives described OLT in any one or more transmission path in many transmission paths The downstream data traffic of transmission.

Wherein, described ONU is according to described bandwidth allocation result, any one in many transmission paths Or many transmission paths upload defeated upstream data and include：

Described upstream data service is transmitted on transmission paths.

Wherein, described ONU is according to described bandwidth allocation result, any one in many transmission paths Or many transmission paths upload defeated upstream data service and also include：

Many transmission paths send a business simultaneously, uplink business data is split, is divided Cut result；

According to described segmentation result, and the bandwidth allocation result that each ONU is allocated, in a plurality of transmission Upstream data is transmitted on path.

Wherein, uplink business data is split, obtain segmentation result and include：

Uplink business data is divided into multiple data blocks；

Distribute a mark for each data block.

Wherein, according to described segmentation result, and the bandwidth allocation result that each ONU is allocated, many On transmission paths, transmission upstream data includes：

The bandwidth being allocated according to each ONU, will have each data block tagged, on a plurality of transmission road OLT is transferred on footpath, makes OLT according to the mark of each data block, each data block is spliced into one complete Entire data block.

Wherein, described many transmission paths include：The single-core fiber being connected between OLT and multiple ONU is many To wavelength, and described single-core fiber is connected with each ONU through optical branching device；Wherein said single-core fiber props up Hold the transmission of multipair wavelength；Each ONU all can be led to OLT by each pair wavelength of described single-core fiber Letter connects.

Wherein, described many transmission paths include：The a plurality of optical fiber being connected between OLT and multiple ONU； And each single-core fiber in described a plurality of optical fiber is connected with each ONU through optical branching device；And each ONU All can be communicated to connect with OLT by each single-core fiber in described a plurality of optical fiber.

Wherein, described many transmission paths include：The a plurality of optical fiber being connected between OLT and multiple ONU is many To wavelength；

Wherein, described a plurality of optical fiber is made up of multiple single-core fibers, and each single in described a plurality of optical fiber Optical fiber is connected with each ONU through optical branching device；And each single-core fiber in described a plurality of optical fiber support many To wavelength transmission, each ONU described all can be multipair by each single-core fiber in described a plurality of optical fiber Wavelength is communicated to connect with OLT.

Wherein, described a plurality of optical fiber includes：Multi-core fiber and a plurality of single-core fiber；Wherein, described multi-core optical Fibre is unified encapsulation by multiple single-core fibers and is formed.

Wherein, described multipair wavelength also includes：Many sub-carrier, subcarrier group or multipair wavestrip.

Wherein, described many transmission paths include：The a plurality of transmission being connected between OLT and multiple ONU The reduction pattern in path；

Wherein, described reduction pattern refer to that each ONU supported by OLT with many transmission paths in Fractional transmission path and OLT communication be connected.

The embodiment of the present invention also provides a kind of data transmission device, is applied to optical network unit ONU side, bag Include：

First transport module, for any one or more transmission path in many transmission paths for the ONU The information that upper transmission is interacted with described OLT；Wherein said information at least includes log-on message, range finding One of information, bandwidth allocation data business information.

The embodiment of the present invention also provides a kind of ONU, including the data transmission device as described in above-described embodiment.

The embodiment of the present invention also provides a kind of data transmission method, is applied to optical line terminal OLT, described OLT is communicated to connect with optical network unit ONU on many transmission paths, including：

Described OLT transmit in any one or more transmission path in many transmission paths with described The information that ONU interacts；Wherein said information at least includes log-on message, ranging information, bandwidth are divided Join one of data business information.

Wherein, described OLT transmit in any one or more transmission path in many transmission paths with The log-on message that optical network unit ONU interacts includes：

The open quiet window in any one or more transmission path in many transmission paths of described OLT Send the identity request information of ONU in mouthful, and it is any in many transmission paths to obtain described ONU The identity information of the ONU sending in one or more transmission path.

Wherein, described OLT transmit in any one or more transmission path in many transmission paths with The ranging information that optical network unit ONU interacts includes：

The open quiet window in any one or more transmission path in many transmission paths of described OLT The introversive described ONU of mouth sends distance measurement request, and completes the range finding to described ONU, and locally applied This range measurement or this range measurement is sent to described ONU.

Wherein, described OLT transmit in any one or more transmission path in many transmission paths with Described ONU carries out bandwidth allocation and includes：

Described OLT determines according to the uplink service of described ONU or the bandwidth request of described ONU, And give described ONU by any one or more transmission path distribution bandwidth in many transmission paths.

Wherein, described OLT transmit in any one or more transmission path in many transmission paths with Described ONU carries out bandwidth allocation and also includes：

, according to the downstream data traffic being sent to described ONU, local scheduling downlink bandwidth is to institute for described OLT State ONU.

Wherein, described OLT transmit in any one or more transmission path in many transmission paths with The data traffic information that described ONU interacts includes：

Described OLT gives the downlink bandwidth of described ONU according to described local scheduling, in many transmission paths Any one or more transmission path on transmit downstream data traffic.

Wherein, described OLT transmit in any one or more transmission path in many transmission paths with The data traffic information that described ONU interacts also includes：

Described OLT receives described ONU in any one or more transmission path in many transmission paths The upstream data service of transmission.

Wherein, described OLT gives the downlink bandwidth of described ONU according to described local scheduling, in a plurality of transmission In any one or more transmission path in path, transmission downstream data traffic includes：

Described downstream data traffic is transmitted on transmission paths.

Wherein, described OLT gives the downlink bandwidth of described ONU according to described local scheduling, in a plurality of transmission In any one or more transmission path in path, transmission downstream data traffic also includes：

Many transmission paths send a business simultaneously, downlink service data is split, is divided Cut result；

According to described segmentation result, and OLT local scheduling gives the downlink bandwidth of each ONU, a plurality of Downlink data is transmitted on transmission path.

Wherein, downlink service data is split, obtain segmentation result and include：

Downlink service data is divided into multiple data blocks；

Distribute a mark for each data block.

Wherein, according to described segmentation result, and OLT local scheduling gives the downlink bandwidth of each ONU, Upload defeated downlink data in many transmission paths to include：

Give the downlink bandwidth of each ONU according to OLT local scheduling, will have each data block tagged, Upload in many transmission paths and be defeated by ONU, make ONU according to the mark of each data block, by each data Block is spliced into a full block of data.

Wherein, described many transmission paths include：

The multipair wavelength of single-core fiber being connected between OLT and multiple ONU, and described single-core fiber divides through light Road device is connected with each ONU；Wherein said single-core fiber supports the transmission of multipair wavelength；Described OLT can Communicated to connect with each ONU by each pair wavelength of described single-core fiber.

Wherein, described many transmission paths include：

The a plurality of optical fiber being connected between OLT and multiple ONU；And each the single light in described a plurality of optical fiber Fibre is connected with each ONU through optical branching device；And described OLT can be single by each in described a plurality of optical fiber Core fibre is communicated to connect with each ONU.

Wherein, described many transmission paths include：

The multipair wavelength of a plurality of optical fiber being connected between OLT and multiple ONU,

Wherein, described a plurality of optical fiber is made up of multiple single-core fibers, and each single in described a plurality of optical fiber Optical fiber is connected with each ONU through optical branching device；And each single-core fiber in described a plurality of optical fiber support many To wavelength transmission, described OLT can by the multipair wavelength of each single-core fiber in described a plurality of optical fiber with Each ONU communicates to connect.

Wherein, described many transmission paths include：

The reduction pattern of the many transmission paths being connected between OLT and multiple ONU；

Wherein, described reduction pattern refers to each ONU by many transmission paths of being supported with OLT Fractional transmission path is connected with OLT communication.

The embodiment of the present invention also provides a kind of data transmission device, is applied to optical line terminal OLT, including：

Second transport module, for any one or more transmission path in many transmission paths for the OLT The information that upper transmission is interacted with described ONU；Wherein said information at least includes log-on message, range finding One of information, bandwidth allocation data business information.

The embodiment of the present invention also provides a kind of OLT, including the passive optical network as described in above-described embodiment In data transmission device.

The embodiment of the present invention also provides a kind of data transmission system, including：OLT, many transmission paths and ONU, described OLT are the OLT described in above-described embodiment, and described ONU is described in above-described embodiment ONU.

The having the beneficial effect that of the technique scheme of the present invention：

The scheme of the embodiment of the present invention, by the number in passive optical network, between OLT and ONU Defeated according to uploading in many transmission paths, and described many transmission paths are separate, data is in transmitting procedure Middle transmission path is optional, every transmission paths can run identical or different data, by OLT and ONU Work in coordination, coordinate these transmission paths, these transmission paths are embodied as a bigger path group of capacity, Thus lifting the bandwidth between OLT and ONU, increased the network capacity of EPON.

Brief description

Fig. 1 is the schematic diagram of passive optical network framework in prior art；

Fig. 2 is that the data transmission method of the embodiment of the present invention is applied to the basic step of optical network unit ONU Schematic diagram；

Fig. 3 is that the data transmission device of the embodiment of the present invention is applied to the composition structure of optical network unit ONU Schematic diagram；

Fig. 4 is that the data transmission method of the embodiment of the present invention is applied to the basic step of optical line terminal OLT Schematic diagram；

Fig. 5 is that the data transmission method of the embodiment of the present invention is applied to the basic step of optical line terminal OLT Schematic diagram；

Fig. 6 is the connection diagram for the multipair wavelength of single-core fiber for many transmission paths of the embodiment of the present invention；

Fig. 7 be the embodiment of the present invention many transmission paths be a plurality of optical fiber connection diagram；

Fig. 8 be the embodiment of the present invention many transmission paths be the multipair wavelength of a plurality of optical fiber connection diagram；

Fig. 9 be the embodiment of the present invention many transmission paths be reduction pattern connection diagram.

Specific embodiment

For making the technical problem to be solved in the present invention, technical scheme and advantage clearer, below in conjunction with attached Figure and specific embodiment are described in detail.

The present invention is directed to data transfer in prior art EPON and the demand of the network bandwidth is increased, but its Transmission path is single, leads to network capacity to be difficult to the problem improving, there is provided a kind of data transmission method, dress Put, system and ONU, OLT, data can upload defeated, and described a plurality of transmission road in many transmission paths Footpath is separate, and data transmission path in transmitting procedure is optional, every transmission paths can run identical Or different pieces of information, worked in coordination by OLT and ONU, coordinate these transmission paths, these are transmitted road Footpath is embodied as a bigger path group of capacity, thus lifting the bandwidth between OLT and ONU, increased The network capacity of EPON.

As shown in Fig. 2 the embodiment of the present invention provides a kind of data transmission method, it is applied to optical network unit ONU, ONU are communicated to connect with optical line terminal OLT on many transmission paths, including：

Step 11, described ONU in any one or more transmission path in many transmission paths with institute State the information that OLT interacts；Wherein said information at least includes log-on message, ranging information, bandwidth One of distribution data business information.

In the data transmission method of the embodiment of the present invention, data can upload defeated and described in many transmission paths Many transmission paths are separate, and data transmission path in transmitting procedure is optional, can on every transmission paths To run identical or different data, increased the network capacity of EPON.

Further, the described ONU providing in the above embodiment of the present invention is in many transmission paths Transmit in any one or more transmission path in the method for log-on message interacting with described OLT, Step 11 also includes：

Step 111, described ONU obtains and responds described OLT any one in many transmission paths Or in open quiet window on many transmission paths the ONU of transmission identity request information, and and The identity letter of ONU is sent to described OLT on any one or more transmission path in many transmission paths Breath.

Further, the described ONU providing in the above embodiment of the present invention is in many transmission paths Transmit in any one or more transmission path in the method for ranging information interacting with described OLT, Step 11 also includes：

Step 112, described ONU obtains and responds described OLT any one in many transmission paths Or in open quiet window on many transmission paths transmission distance measurement request, and according to ONU in a plurality of biography The ranging response replied in any one or more transmission path in defeated path obtains what described OLT completed Range measurement.

Further, the described ONU providing in the above embodiment of the present invention is in many transmission paths Carry out with described OLT in any one or more transmission path bandwidth allocation method in, step 11 is also Including：

Step 113, described ONU obtains described OLT according to the uplink service of described ONU or described ONU Bandwidth request and determine and divided by any one or more transmission path in many transmission paths The bandwidth allocation result joined.

Further, the described ONU providing in the above embodiment of the present invention is in many transmission paths In the method for data traffic information interacting with described OLT in any one or more transmission path, Step 11 also includes：

Step 114, described ONU is according to described bandwidth allocation result, any in many transmission paths Upstream data service is transmitted on one or more transmission path.

Step 115, described ONU receives described OLT in many transmission paths any one or more The downstream data traffic of transmission in transmission path.

Further, the described ONU providing in the above embodiment of the present invention ties according to described bandwidth allocation Really, the method that upstream data service is transmitted on any one or more transmission path in many transmission paths In, step 114 can include：

Step 1141, transmits described upstream data service on transmission paths.

Further, the described ONU providing in the above embodiment of the present invention ties according to described bandwidth allocation Really, the method that upstream data service is transmitted on any one or more transmission path in many transmission paths In, step 114 can also include：

Step 1142, sends a business on many transmission paths simultaneously, uplink business data is carried out Segmentation, obtains segmentation result；

Step 1143, according to described segmentation result, and the bandwidth allocation result that each ONU is allocated, Upload defeated upstream data in many transmission paths.

Further, send a business on many transmission paths in step 1142, by upper industry simultaneously Business data is split, and obtains segmentation result, methods described also includes：

Step 1142-1, uplink business data is divided into multiple data blocks；

Step 1142-2, distributes a mark for each data block.

Further, according to described segmentation result in step 1143, and the band that each ONU is allocated Wide allocation result, uploads defeated upstream data in many transmission paths, and methods described also includes：

Step 1143-1, the bandwidth being allocated according to each ONU, will have each data block tagged, Upload in many transmission paths and be defeated by OLT, make OLT according to the mark of each data block, by each data Block is spliced into a full block of data.

Specifically, the many transmission paths described in embodiment of the present invention said method step include：OLT The multipair wavelength of single-core fiber being connected between multiple ONU, and described single-core fiber through optical branching device with every Individual ONU is connected；Wherein said single-core fiber supports the transmission of multipair wavelength；Each ONU all can lead to Cross each pair wavelength of described single-core fiber and OLT communicates to connect.

Specifically, the many transmission paths described in embodiment of the present invention said method step also include：OLT The a plurality of optical fiber being connected between multiple ONU；And each single-core fiber in described a plurality of optical fiber is through light Shunt is connected with each ONU；And each ONU all can be by each single in described a plurality of optical fiber Optical fiber is communicated to connect with OLT.

Specifically, the many transmission paths described in embodiment of the present invention said method step also include：OLT The multipair wavelength of a plurality of optical fiber being connected between multiple ONU；

Wherein, described multi-core fiber is made up of multiple single fiber, and each single in described a plurality of optical fiber Optical fiber is connected with each ONU through optical branching device；And each single-core fiber in described a plurality of optical fiber support many To wavelength transmission, each ONU described all can be multipair by each single-core fiber in described a plurality of optical fiber Wavelength is communicated to connect with OLT.

Specifically, a plurality of optical fiber described in embodiment of the present invention said method includes：Multi-core fiber and a plurality of Single-core fiber；Wherein, described multi-core fiber is unified encapsulation by multiple single-core fibers and is formed.

Specifically, the multipair wavelength described in embodiment of the present invention said method also includes：Many sub-carrier, Subcarrier group or multipair wavestrip.

Specifically, the many transmission paths described in embodiment of the present invention said method step also include：OLT The reduction pattern of the many transmission paths being connected between multiple ONU；

Specifically, described reduction pattern refers to each ONU by the many transmission paths supported with OLT In fractional transmission path and OLT communication be connected it is not necessary to each transmission paths phase of being supported with OLT Even.

Specifically, described reduction pattern can be, each ONU can by one or more pairs of wavelength with OLT connects；Can also be that each ONU can be connected with OLT by one or more single-core fibers； Can also be that each ONU can be by the one or more pairs of wavelength in one or more single-core fibers and OLT Connect.

In the said method of the present invention, data can be defeated in the upload of many transmission paths, and described a plurality of transmission road Footpath is separate, and data transmission path in transmitting procedure is optional, every transmission paths can run identical Or different pieces of information, worked in coordination by OLT and ONU, coordinate these transmission paths, these are transmitted road Footpath is embodied as a bigger path group of capacity, thus lifting the bandwidth between OLT and ONU, increased The network capacity of EPON.

As shown in figure 3, the embodiment of the present invention also provides a kind of data transmission device, it is applied to optical network unit ONU, including：

First transport module 21, for any one or more transmission road in many transmission paths for the ONU The information being interacted with optical line terminal OLT is transmitted on footpath；Wherein said information at least includes registration letter One of breath, range finding, bandwidth allocation data business information.

Specifically, the first transport module 21 described in the above embodiment of the present invention also includes：

First acquisition implementation sub-module, obtains and responds described OLT on a plurality of transmission road for described ONU The identity request of the ONU sending in open quiet window in any one or more transmission path in footpath Information, and send to described OLT in any one or more transmission path in many transmission paths The identity information of ONU.

Second acquisition implementation sub-module, obtains and responds described OLT on a plurality of transmission road for described ONU The distance measurement request sending in open quiet window in any one or more transmission path in footpath, and according to The ranging response that ONU replys in any one or more transmission path in many transmission paths obtains institute State the range measurement that OLT completes.

3rd acquisition submodule, obtains the upper industry according to described ONU for the described OLT for described ONU Business or the bandwidth request of described ONU and determine and by any one or many in many transmission paths Transmission paths and the bandwidth allocation result distributed.

First uplink submodule, for described ONU according to described bandwidth allocation result, in a plurality of biography Upstream data service is transmitted on any one or more transmission path in defeated path.

First downlink transfer submodule, receives described OLT in many transmission paths for described ONU The downstream data traffic of transmission in any one or more transmission path.

Specifically, the first up biography in the first transport module 21 described in the above embodiment of the present invention Defeated submodule also includes：

First uplink unit, for transmitting described upstream data service on transmission paths.

First cutting unit, for sending a business on many transmission paths simultaneously, by uplink service number According to being split, obtain segmentation result；

Second uplink unit, for according to described segmentation result, and the band that each ONU is allocated Wide allocation result, uploads defeated upstream data in many transmission paths.

Specifically, the first cutting unit of the first transport module 21 described in the above embodiment of the present invention Also include：

First segmentation subelement, for being divided into multiple data blocks by uplink business data；

First mark subelement, for distributing a mark for each data block.

Specifically, the first up biography in the first transport module 21 described in the above embodiment of the present invention The the secondth uplink unit in defeated submodule also includes：

Second uplink subelement, for the bandwidth being allocated according to each ONU, will have tagged Each data block, uploads in many transmission paths and is defeated by OLT, make OLT according to the mark of each data block, Each data block is spliced into a full block of data.

Specifically, the many transmission paths described in the above embodiment of the present invention include：OLT with multiple The multipair wavelength of single-core fiber connecting between ONU, and described single-core fiber is through optical branching device and each ONU It is connected；Wherein said single-core fiber supports the transmission of multipair wavelength；Each ONU all can pass through described list The each pair wavelength of core fibre is communicated to connect with OLT.

Specifically, the many transmission paths described in the above embodiment of the present invention include：OLT with multiple The a plurality of optical fiber connecting between ONU；And each single-core fiber in described a plurality of optical fiber through optical branching device with Each ONU is connected；And each ONU all can be by each single-core fiber in described a plurality of optical fiber and OLT Communication connection.

Specifically, the many transmission paths described in the above embodiment of the present invention include：OLT with multiple The multipair wavelength of a plurality of optical fiber connecting between ONU,

Specifically, a plurality of optical fiber described in the above embodiment of the present invention includes：Multi-core fiber and a plurality of single Optical fiber；Wherein, described multi-core fiber is unified encapsulation by multiple single-core fibers and is formed.

Specifically, the multipair wavelength described in the above embodiment of the present invention also includes：Many sub-carrier, sub- load Wave group or multipair wavestrip.

Specifically, the many transmission paths described in the above embodiment of the present invention include：OLT with multiple The reduction pattern of many transmission paths of the connection between ONU；

Wherein, described reduction pattern refers to each ONU by many transmission paths of being supported with OLT Fractional transmission path and OLT communication be connected it is not necessary to be connected with each transmission paths that OLT is supported.

It should be noted that：This device is device corresponding with said method, and all realizations of said method are real Apply example all be applied to the embodiment of this device, also can reach identical technique effect.

As shown in figure 4, the embodiment of the present invention also provides a kind of data transmission method, it is applied to optical line terminal OLT, described OLT are communicated to connect with optical network unit ONU on many transmission paths, including：

Step 31, described OLT transmits in any one or more transmission path in many transmission paths The information interacting with described ONU；Wherein said information at least include log-on message, ranging information, One of bandwidth allocation data business information.

Further, the described OLT providing in the above embodiment of the present invention uploads in many transmission paths In the method for the defeated log-on message carrying out with optical network unit ONU, step 31 includes：

Step 311, described OLT is open in any one or more transmission path in many transmission paths Quiet window in send the identity request information of ONU, and obtain described ONU in many transmission paths In any one or more transmission path on send ONU identity information.

Further, the described OLT providing in the above embodiment of the present invention uploads in many transmission paths In the method for the defeated ranging information carrying out with optical network unit ONU, step 31 also includes：

Step 312, described OLT is open in any one or more transmission path in many transmission paths Quiet window in send distance measurement request to described ONU, and complete the range finding to described ONU, and This range measurement locally applied or this range measurement is sent to described ONU.

Further, the OLT providing in the above embodiment of the present invention is any in many transmission paths In one or more transmission path, transmission and described ONU are carried out in the method for bandwidth allocation, and step 31 can To include：

Step 313, described OLT please according to the uplink service of described ONU or the bandwidth of described ONU Ask and determine and by any one or more transmission path distribution bandwidth in many transmission paths to institute State ONU.

Further, the OLT providing in the above embodiment of the present invention is any in many transmission paths In one or more transmission path, transmission and described ONU carry out in the method for bandwidth allocation, and step 31 is also Can include：

Step 314, described OLT according to the downstream data traffic being sent to described ONU, under local scheduling Row bandwidth gives described ONU.

Further, the OLT providing in the above embodiment of the present invention is any in many transmission paths In one or more transmission path transmit interact with described ONU data traffic information method In, step 31 can include：

Step 315, described OLT gives the downlink bandwidth of described ONU according to described local scheduling, a plurality of Downstream data traffic is transmitted on any one or more transmission path in transmission path.

Further, the OLT providing in the above embodiment of the present invention is any in many transmission paths Transmit in one or more transmission path in the method for data traffic information interacting with described ONU, Step 31 can also include：

Step 316, described OLT receives described ONU in many transmission paths any one or more The upstream data service of transmission in transmission path.

Further, OLT described in the above embodiment of the present invention according to described local scheduling give described The downlink bandwidth of ONU, transmits descending in any one or more transmission path in many transmission paths In the method for data service, also include in step 315：

Step 3151, transmits described downstream data traffic on transmission paths.

Further, also include in step 316 in the above embodiment of the present invention：

Step 3152, when sending a business on many transmission paths, downlink service data is entered simultaneously Row segmentation, obtains segmentation result；

Step 3153, according to described segmentation result, and OLT local scheduling is descending to each ONU Bandwidth, uploads defeated downlink data in many transmission paths.

Further, in step 3152, downlink service data is split, obtained segmentation result, described Method also includes：

Step 3152-1, downlink service data is divided into multiple data blocks；

Step 3152-2, distributes a mark for each data block.

Further, according to described segmentation result in step 3153, and OLT local scheduling gives each The downlink bandwidth of ONU, uploads defeated downlink data in many transmission paths, and methods described also includes：

Step 3153-1, gives the downlink bandwidth of each ONU, will have tagged according to OLT local scheduling Each data block, uploads in many transmission paths and is defeated by ONU, make ONU according to the mark of each data block, Each data block is spliced into a full block of data.

Specifically, the many transmission paths described in embodiment of the present invention said method step also include：OLT The a plurality of optical fiber being connected between multiple ONU；

And each single-core fiber in described a plurality of optical fiber is connected with each ONU through optical branching device；

And each ONU all can be communicated to connect with OLT by each single-core fiber in described a plurality of optical fiber.

Specifically, the many transmission paths described in embodiment of the present invention said method step also include：OLT The multipair wavelength of a plurality of optical fiber being connected between multiple ONU,

Specifically, described in the embodiment of the present invention, a plurality of optical fiber includes：Multi-core fiber and a plurality of single-core fiber； Wherein, described multi-core fiber is unified encapsulation by multiple single-core fibers and is formed.

Specifically, described in the embodiment of the present invention, multipair wavelength also includes：Many sub-carrier, subcarrier group or Multipair wavestrip.

As shown in figure 5, the embodiment of the present invention also provides a kind of data transmission device, it is applied to optical network unit OLT, including：

Second transport module 41, for any one or more transmission road in many transmission paths for the OLT The information being interacted with described ONU is transmitted on footpath；Wherein said information at least includes log-on message, survey Away from one of information, bandwidth allocation data business information.

Specifically, the second transport module 41 described in the above embodiment of the present invention also includes：

Information request acquisition submodule, for any one or many in many transmission paths of described OLT Send the identity request information of ONU in open quiet window on transmission paths, and obtain described ONU The identity information of the ONU sending in any one or more transmission path in many transmission paths.

Second transmission processe submodule, for any one or many in many transmission paths of described OLT Send distance measurement request to described ONU in open quiet window on transmission paths, and OLT completes to institute State the range finding of ONU, and in this range measurement locally applied or this range measurement is sent to described ONU.

Bandwidth allocation submodule, for by described OLT according to the uplink service or described of described ONU The bandwidth request of ONU and determine and by any one or more transmission road in many transmission paths Footpath distribution bandwidth gives described ONU.

Bandwidth scheduling submodule, for by described OLT according to the downstream data traffic being sent to described ONU, Local scheduling downlink bandwidth gives described ONU.

Second downlink transfer submodule, for giving described ONU's by described OLT according to described local scheduling Downlink bandwidth, transmits downlink data industry in any one or more transmission path in many transmission paths Business.

Second uplink submodule, receives described ONU in many transmission paths for described OLT The upstream data service of transmission in any one or more transmission path.

Specifically, the second descending biography in the second transport module 41 described in the above embodiment of the present invention Defeated submodule also includes：

First downlink transfer unit, transmits described downstream data traffic on transmission paths.

Second cutting unit, sends a business on many transmission paths simultaneously, downlink service data is entered Row segmentation, obtains segmentation result；

Second downlink transfer unit, for according to described segmentation result, and OLT local scheduling gives each The downlink bandwidth of ONU, uploads defeated downlink data in many transmission paths.

Specifically, the second cutting unit of the second transport module 41 described in the above embodiment of the present invention Also include：

Second segmentation subelement, for being divided into multiple data blocks by downlink service data；

Second mark subelement, for distributing a mark for each data block.

Specifically, the second descending biography in the second transport module 41 described in the above embodiment of the present invention The second downlink transfer unit in defeated submodule also includes：

Second downlink transfer subelement, for giving the downlink bandwidth of each ONU according to OLT local scheduling, To have each data block tagged, and upload in many transmission paths and be defeated by ONU, make ONU according to each The mark of data block, each data block is spliced into a full block of data.

Specifically, the many transmission paths described in the above embodiment of the present invention include：OLT with multiple The multipair wavelength of a plurality of optical fiber of the connection between ONU；

Specifically, described in the above embodiment of the present invention, a plurality of optical fiber includes：Multi-core fiber and a plurality of single light Fine；Wherein, described multi-core fiber is unified encapsulation by multiple single-core fibers and is formed.

Specifically, described in the above embodiment of the present invention, multipair wavelength also includes：Many sub-carrier, subcarrier Group or multipair wavestrip.

Specifically, the many transmission paths stated in the above embodiment of the present invention include：OLT and multiple ONU Between many transmission paths of connection reduction pattern；

The embodiment of the present invention also provides a kind of OLT, including the data transmission device as described in above-described embodiment.

The embodiment of the present invention also provides a kind of data transmission system, including：OLT, many transmission paths and ONU, described OLT are the OLT as described in above-described embodiment, and described ONU is as above-described embodiment institute The ONU stating.

Carry out the data transmission method in the clearer description present invention with reference to specific embodiment.

Embodiment one

As shown in fig. 6, being the connection that many transmission paths of the embodiment of the present invention are the multipair wavelength of single-core fiber Schematic diagram, is connected by simple optical fiber between OLT and ONU, i.e. single-core fiber.And described single-core fiber It is connected with each ONU through optical branching device；Wherein, single-core fiber supports the transmission of multipair wavelength.Specifically, 2 wavelength in a pair of wavelength said herein are used for upstream data and downlink data respectively.And OLT side Optical module support multipair wavelength, the optical module of ONU side supports multipair wavelength.This data transmission method, During transmission downlink data, specially：

This single-core fiber support three transmission to wavelength, first wave length, the 3rd wavelength and the 5th wavelength respectively with Each ONU is connected.

OLT sends out in all open peace and quiet window on the first wave length of single-core fiber, the 3rd wavelength and the 5th wavelength Send the identity request information of ONU；

The identity of the ONU that ONU sends on the first wave length of single-core fiber, the 3rd wavelength and the 5th wavelength Information；

In all open quiet window on the first wave length of single-core fiber, the 3rd wavelength and the 5th wavelength of OLT Send distance measurement request；

OLT completes the range finding to ONU, and sends out in this range measurement locally applied or by this range measurement Deliver to ONU.

OLT according to the downstream data traffic being sent to ONU, by first wave length, the 3rd wavelength and the 5th Wavelength local scheduling downlink bandwidth gives each ONU；

When OLT sends same downlink data to each ONU on described three wavelength, adjusted according to local Spend to the downlink bandwidth of three ONU, downlink data is divided into multiple data blocks, OLT is each data Block distributes an ID, and distributes a numbering to each data block after segmentation；

When OLT sends the data block after segmentation, send the data of respective ID, numbering and segmentation simultaneously Number；

When each ONU receives the data with ID, the number according to the data of segmentation collects data block, And recover, according to numbering, the data that OLT sends.

During transmission upstream data, specially：

In all open quiet window on the second wave length of single-core fiber, the 4th wavelength and the 6th wavelength of OLT Send the identity request information of ONU；

The identity of the ONU that ONU sends on the second wave length of single-core fiber, the 4th wavelength and the 6th wavelength Information；

The all open quiet window on the second wave length of single-core fiber, the 4th wavelength and the 6th wavelength of OLT is sent out Send distance measurement request；

OLT determines according to the uplink service of described ONU or the uplink bandwidth request of ONU and logical Cross second wave length, the 4th wavelength and the 6th Wavelength Assignment upstream bandwidth to described ONU.

When ONU sends same upstream data to OLT on described three wavelength, according to distributing to three The upstream bandwidth of ONU, upstream data is divided into multiple data blocks, and ONU distributes one for each data block Individual ID, and distribute a numbering to each data block after segmentation；

When ONU sends the data block after segmentation, send the data of respective ID, numbering and segmentation simultaneously Number；

When OLT receives the data with ID, the number according to the data of segmentation collects data block, and presses Recover the data that ONU sends according to numbering.

Need exist for illustrate be.First wave length and second wave length are a pair of wavelength, the 3rd wavelength and the 4th ripple A length of a pair of wavelength, the 5th wavelength and the 6th wavelength are a pair of wavelength.

Multipair wavelength described in the present embodiment may refer to many sub-carrier in OFDM, subcarrier group or Multipair wavestrip.

In OFDM-PON, sending side converts digital signals into analogue signal, then to analogue signal Using OFDM modulation, in different wavestrips, in subcarrier group or on subcarrier, it is sent to receiving side, Receiving side is according in different wavestrips, in subcarrier group or received over subcarriers data.

Embodiment two

As shown in fig. 7, being the connection diagram that many transmission paths of the embodiment of the present invention are a plurality of optical fiber, It is connected by a plurality of optical fiber between OLT and ONU, and each single-core fiber in described a plurality of optical fiber is through light Shunt is connected with each ONU；Each ONU all can be by each the single light in described a plurality of optical fiber Fine and OLT communicates to connect.This data transmission method, taking transmit downlink data as a example, specially：

OLT is all open on the first single-core fiber of a plurality of optical fiber, the second single-core fiber and the 3rd single-core fiber Quiet window in send ONU identity request information；

ONU sends on the first single-core fiber of single-core fiber, the second single-core fiber and the 3rd single-core fiber ONU identity information；

OLT is all open on the first single-core fiber of single-core fiber, the second single-core fiber and the 3rd single-core fiber Quiet window in send distance measurement request；

OLT according to the downstream data traffic being sent to ONU, by the first single-core fiber, the second single light Fine and the 3rd single-core fiber local scheduling downlink bandwidth gives each ONU；

When OLT sends same downlink data to each ONU on described three single-core fibers, according to this Be scheduled to the downlink bandwidth of three ONU, downlink data is divided into multiple data blocks, OLT is each Data block distributes an ID, and distributes a numbering to each data block after segmentation；

During transmission upstream data, its process is similar with embodiment one, will not be described here.

A plurality of optical fiber described in the present embodiment includes：Multi-core fiber and a plurality of single-core fiber；Wherein,

The difference of a plurality of single-core fiber and multi-core fiber is：Multi-core fiber is unified encapsulation, and length is the same , and a plurality of single-core fiber is separate, length each other cannot ensure equally.

Embodiment three

As shown in figure 8, being the connection that many transmission paths of the embodiment of the present invention are the multipair wavelength of a plurality of optical fiber Schematic diagram, is connected by a plurality of optical fiber between OLT and ONU, and wherein, described a plurality of optical fiber is by multiple lists Core fibre forms, and each single-core fiber in described a plurality of optical fiber is connected with each ONU through optical branching device； The plurality of single-core fiber all supports the transmission of multipair wavelength simultaneously.Each ONU all can pass through described a plurality of Each single-core fiber in optical fiber is communicated to connect with OLT.This data transmission method, to transmit downlink data As a example, specially：

Three wavelength of the first single-core fiber in a plurality of optical fiber for the OLT, three wavelength of the second single-core fiber and The identity request information of ONU is sent in all open quiet window on three single-core fiber three wavelength；

ONU is in three wavelength of the first single-core fiber, three wavelength of the second single-core fiber and the 3rd single light The identity information of the ONU sending on fine three wavelength；

OLT three wavelength of the first single-core fiber, three wavelength of the second single-core fiber and the 3rd single light On fine three wavelength, all open quiet window sends distance measurement request；

OLT according to the downstream data traffic being sent to ONU, by three wavelength of the first single-core fiber, Second single-core fiber three wavelength and three wavelength local scheduling downlink bandwidths of the 3rd single-core fiber give each ONU；

When OLT sends same downlink data to each on three wavelength on described three single-core fibers During ONU, give the downlink bandwidth of three ONU according to local scheduling, downlink data is divided into multiple data Block, OLT distributes an ID for each data block, and distributes a numbering to each data block after segmentation；

Example IV

As shown in figure 9, being the connection diagram that many transmission paths of the embodiment of the present invention are reduction pattern, Described reduction pattern refers to each ONU by being connected with OLT communication with the part in many transmission paths, Need not be connected with each transmission paths.Can be, each ONU can by one or more pairs of wavelength with OLT connects；Can also be that each ONU can be connected with OLT by one or more single-core fibers； Can also be that each ONU can be by the one or more pairs of wavelength in one or more single-core fibers and OLT Connect.Data transmission method under described reduction pattern and the data transmission method step one in above-described embodiment Sample, here is omitted.

The above is the preferred embodiment of the present invention it is noted that common skill for the art For art personnel, on the premise of without departing from principle of the present invention, some improvements and modifications can also be made, These improvements and modifications also should be regarded as protection scope of the present invention.

Claims

1. it is characterised in that being applied to optical network unit ONU, a kind of ONU's data transmission method exists Communicate to connect with optical line terminal OLT on many transmission paths, including：

Described ONU transmits and institute in any one or more transmission path in described many transmission paths State the information that OLT interacts；Wherein said information at least includes log-on message, ranging information, bandwidth One of distribution data business information.

2. data transmission method according to claim 1 is it is characterised in that described ONU is many The registration being interacted with described OLT is transmitted on any one or more transmission path in transmission paths Information includes：

3. data transmission method according to claim 1 is it is characterised in that described ONU is many The range finding being interacted with described OLT is transmitted on any one or more transmission path in transmission paths Information includes：

4. data transmission method according to claim 1 is it is characterised in that described ONU is many Carry out bandwidth allocation with described OLT in any one or more transmission path in transmission paths to include：

5. data transmission method according to claim 4 is it is characterised in that described ONU is many The data being interacted with described OLT is transmitted on any one or more transmission path in transmission paths Business information includes：

6. data transmission method according to claim 5 is it is characterised in that described ONU is many The data being interacted with described OLT is transmitted on any one or more transmission path in transmission paths Business information also includes：

7. data transmission method according to claim 5 it is characterised in that described ONU according to Described bandwidth allocation result, transmits up in any one or more transmission path in many transmission paths Data service includes：

Described upstream data service is transmitted on transmission paths.

8. data transmission method according to claim 5 it is characterised in that described ONU according to Described bandwidth allocation result, transmits up in any one or more transmission path in many transmission paths Data service also includes：

9. data transmission method according to claim 8 is it is characterised in that by uplink business data Split, obtain segmentation result and include：

Uplink business data is divided into multiple data blocks；

Distribute a mark for each data block.

10. data transmission method according to claim 9 is it is characterised in that tie according to described segmentation Really, and each ONU be allocated bandwidth allocation result, many transmission paths upload defeated upstream data Including：

11. data transmission methods according to claim 1 are it is characterised in that described a plurality of transmission road Footpath includes：The multipair wavelength of single-core fiber being connected between OLT and multiple ONU, and described single-core fiber warp Optical branching device is connected with each ONU；Wherein said single-core fiber supports the transmission of multipair wavelength；Each ONU all can be communicated to connect with OLT by each pair wavelength of described single-core fiber.

12. data transmission methods according to claim 1 are it is characterised in that described a plurality of transmission road Footpath includes：The a plurality of optical fiber being connected between OLT and multiple ONU；And each in described a plurality of optical fiber is single Core fibre is connected with each ONU through optical branching device；And each ONU all can be by described a plurality of optical fiber Each single-core fiber and OLT communicate to connect.

13. data transmission methods according to claim 1 are it is characterised in that described a plurality of transmission road Footpath includes：The multipair wavelength of a plurality of optical fiber being connected between OLT and multiple ONU,

Wherein, described a plurality of optical fiber is made up of multiple single-core fibers, and each single in described a plurality of optical fiber Optical fiber is connected with each ONU through optical branching device；

And each single-core fiber in described a plurality of optical fiber supports multipair wavelength transmission, each ONU described is equal Can be communicated to connect with OLT by the multipair wavelength of each single-core fiber in described a plurality of optical fiber.

14. data transmission methods according to claim 12 or 13 are it is characterised in that described a plurality of Optical fiber includes：Multi-core fiber and a plurality of single-core fiber；Wherein, described multi-core fiber is united by multiple single-core fibers One encapsulation composition.

15. data transmission methods according to claim 11 or 13 are it is characterised in that described multipair Wavelength also includes：Many sub-carrier, subcarrier group or multipair wavestrip.

16. data transmission methods according to claim 1 are it is characterised in that described a plurality of transmission road Footpath includes：The reduction pattern of the many transmission paths being connected between OLT and multiple ONU；

Wherein, described reduction pattern refers to each ONU by many transmission paths of being supported with OLT Fractional transmission path and OLT communication be connected.

A kind of 17. data transmission devices it is characterised in that being applied to optical network unit ONU, including：

A kind of 18. ONU are it is characterised in that include passive optical network as claimed in claim 17 In data transmission device.

A kind of 19. data transmission methods it is characterised in that being applied to optical line terminal OLT, described OLT Many transmission paths are communicated to connect with optical network unit ONU, including：

20. according to claim 19 data transmission method it is characterised in that described OLT is a plurality of In any one or more transmission path in transmission path, transmission and optical network unit ONU interact Log-on message includes：

21. data transmission methods according to claim 19 are it is characterised in that described OLT is many Transmit in any one or more transmission path in transmission paths and interact with optical network unit ONU Ranging information include：

22. data transmission methods according to claim 19 are it is characterised in that described OLT is many In any one or more transmission path in transmission paths, transmission and described ONU carry out bandwidth allocation packet Include：

23. data transmission methods according to claim 19 are it is characterised in that described OLT is many In any one or more transmission path in transmission paths, transmission and described ONU carry out bandwidth allocation also Including：

24. data transmission methods according to claim 23 are it is characterised in that described OLT is many The data being interacted with described ONU is transmitted on any one or more transmission path in transmission paths Business information includes：

25. data transmission methods according to claim 24 are it is characterised in that described OLT is many The data being interacted with described ONU is transmitted on any one or more transmission path in transmission paths Business information also includes：

26. data transmission methods according to claim 24 it is characterised in that described OLT according to Described local scheduling gives the downlink bandwidth of described ONU, any one or more in many transmission paths In transmission path, transmission downstream data traffic includes：

Described downstream data traffic is transmitted on transmission paths.

27. data transmission methods according to claim 24 it is characterised in that described OLT according to Described local scheduling gives the downlink bandwidth of described ONU, any one or more in many transmission paths In transmission path, transmission downstream data traffic also includes：

28. data transmission methods according to claim 27 are it is characterised in that by downlink business number According to being split, obtain segmentation result and include：

Downlink service data is divided into multiple data blocks；

Distribute a mark for each data block.

29. data transmission methods according to claim 28 are it is characterised in that according to described segmentation As a result, and OLT local scheduling give each ONU downlink bandwidth, many transmission paths upload defeated under Row data includes：

30. data transmission methods according to claim 19 are it is characterised in that described a plurality of transmission Path includes：

The multipair wavelength of single-core fiber being connected between OLT and multiple ONU, and described single-core fiber is through light Shunt is connected with each ONU；Wherein said single-core fiber supports the transmission of multipair wavelength；Described OLT Can be communicated to connect with each ONU by each pair wavelength of described single-core fiber.

31. data transmission methods according to claim 19 are it is characterised in that described a plurality of transmission Path includes：

The a plurality of optical fiber being connected between OLT and multiple ONU；And each single in described a plurality of optical fiber Optical fiber is connected with each ONU through optical branching device；And described OLT can be by each in described a plurality of optical fiber Single-core fiber is communicated to connect with each ONU.

32. data transmission methods according to claim 19 are it is characterised in that described a plurality of transmission Path includes：

33. data transmission methods according to claim 31 or 32 are it is characterised in that described a plurality of Optical fiber includes：Multi-core fiber and a plurality of single-core fiber；Wherein, described multi-core fiber is united by multiple single-core fibers One encapsulation composition.

34. data transmission methods according to claim 30 or 32 are it is characterised in that described multipair Wavelength also includes：Many sub-carrier, subcarrier group or multipair wavestrip.

35. data transmission methods according to claim 19 are it is characterised in that described a plurality of transmission Path includes：

A kind of 36. data transmission devices it is characterised in that being applied to optical line terminal OLT, including：

Second transport module, for any one or more transmission path in many transmission paths for the OLT The information that upper transmission is interacted with described ONU；Wherein said information at least includes log-on message, range finding One of information data business information.

A kind of 37. OLT are it is characterised in that include data transmission device as claimed in claim 34.

A kind of 38. data transmission systems are it is characterised in that include：OLT, many transmission paths and ONU, Described OLT is OLT as claimed in claim 37, and described ONU is as claimed in claim 18 ONU.