WO2017193879A1 - 数据的传输方法、装置及系统 - Google Patents

数据的传输方法、装置及系统 Download PDF

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Publication number
WO2017193879A1
WO2017193879A1 PCT/CN2017/083298 CN2017083298W WO2017193879A1 WO 2017193879 A1 WO2017193879 A1 WO 2017193879A1 CN 2017083298 W CN2017083298 W CN 2017083298W WO 2017193879 A1 WO2017193879 A1 WO 2017193879A1
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WIPO (PCT)
Prior art keywords
data
channels
channel
olt
onu
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PCT/CN2017/083298
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English (en)
French (fr)
Inventor
耿丹
张伟良
袁立权
马壮
郭勇
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中兴通讯股份有限公司
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Publication of WO2017193879A1 publication Critical patent/WO2017193879A1/zh

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q11/00—Selecting arrangements for multiplex systems
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q11/00—Selecting arrangements for multiplex systems
    • H04Q11/0001—Selecting arrangements for multiplex systems using optical switching
    • H04Q11/0005—Switch and router aspects
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J3/00—Time-division multiplex systems
    • H04J3/02—Details
    • H04J3/06—Synchronising arrangements
    • H04J3/0635—Clock or time synchronisation in a network
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q11/00—Selecting arrangements for multiplex systems
    • H04Q11/0001—Selecting arrangements for multiplex systems using optical switching
    • H04Q11/0005—Switch and router aspects
    • H04Q2011/0037—Operation
    • H04Q2011/0045—Synchronisation

Definitions

  • the present invention relates to the field of communications, and in particular to a method, device and system for transmitting data.
  • PON Passive Optical Network
  • FIG. 1 is a schematic diagram of the structure of a passive optical network in the related art.
  • the PON system usually consists of optical line terminals (OLTs) on the central side and opticals on the user side.
  • the network unit Optical Network Unit, ONU for short
  • ODN Optical Distribution Network
  • ODN consists of passive optical components such as single-mode fiber and optical splitter, optical connector, etc., providing optical transmission medium for the physical connection between OLT and ONU.
  • ODN consists of passive optical components such as single-mode fiber and optical splitter, optical connector, etc., providing optical transmission medium for the physical connection between OLT and ONU.
  • the data of different ONUs on the same wavelength adopts time division multiplexing mode, and the uplink adopts time division multiplexing access mode. This is called a wavelength division time division PON system.
  • Each OLT manages multiple sets of ONUs.
  • the upstream wavelengths of the uplink data transmitted by a group of ONUs on the same upstream wavelength and downlink wavelength are the same, and the downlink wavelengths of receiving downlink data are also the same, different upstream wavelengths and
  • the uplink wavelengths of the uplink data transmitted by the ONU group on the downlink wavelength are different, and the downlink wavelengths of the downlink data are also different.
  • the ONU can simultaneously transmit and receive data on multiple sets of wavelength channels.
  • the OLT send data to multiple wavelength channels and send it to the ONU.
  • the data packets are numbered by the OLT, and the number is inserted into the frame structure including the data packet, but the existing PON system There is not enough space in the frame structure to carry the number of the data packet. If the data packet is sent to the ONU in a certain time sequence, if the data link is jittered, the data packet sent first is sent later than the data sent later. When the packet arrives at the receiving end, it will cause the packet of the receiving party to be out of order.
  • the embodiments of the present invention provide a data transmission method, apparatus, and system, to at least solve the problem that the data is sent or received on multiple sets of wavelength channels in the related art.
  • a data transmission method including: an optical line terminal OLT acquires channels of all wavelengths supported by an optical network unit ONU; and the OLT performs the ONU on the channel. Ranging obtains a transmission delay of the ONU on a channel of different wavelengths; the OLT adjusts a transmission delay on a channel of a different wavelength, and transmits data on the channel of the adjusted transmission delay; wherein, adjusting The subsequent transmission delay causes the time required for data transmitted on all channels of the OLT to reach the ONU to be equal.
  • the method further includes: before the OLT simultaneously transmits data to the ONU on the multiple channels, the OLT sets the difference of the start transmission time of the data transmission data to every two time sequential interval channels to be greater than a predetermined value; the OLT transmits data to the plurality of channels separately according to the start transmission time.
  • the predetermined value is twice the downlink data jitter time.
  • the method further includes: after the OLT performs ranging on the channel by the ONU, the OLT allocates an uplink bandwidth to the ONU on multiple channels, where all channels are on the same The uplink bandwidth start time is different, and the ONU transmits data on multiple channels according to the start time corresponding to the channel.
  • the ONU transmits data according to a rule negotiated with the OLT, where the rule of negotiation is to sequentially transmit data according to the wavelength of the channel.
  • the method further includes: the OLT storing information about the acquired channel and The information of the transmission delay.
  • the method further includes: the OLT allocates data to the multiple channels according to a preset channel sequence and transmits the data to the ONU, wherein the preset channel sequence is a sequence of channel wavelengths.
  • the adjusting, by the OLT, the transmission delay on the channel of different wavelengths includes: the OLT selecting a maximum transmission delay from the measured transmission delay; and the OLT subtracting the maximum transmission delay from the other channel. After the transmission delay value is divided by 2, an additional transmission delay value that needs to be added to the uplink and downlink of the other channel is obtained; the OLT adds the transmission delay of the other channel to the additional transmission delay value to make all channels.
  • the uplink and downlink data transmission delay values are the same.
  • a data transmission method including: an optical network unit ONU receiving data transmitted by an optical line terminal OLT on a channel of an adjusted transmission delay; wherein, the adjusted transmission The delay is such that the time required for data transmitted on all channels of the OLT to reach the ONU is equal.
  • the data that is sent by the optical network unit ONU on the channel of the adjusted transmission delay of the optical line terminal OLT includes: the ONU is in sequence according to the receiving time of the first bit of each received data.
  • the data of the channel is grouped; or the ONU groups the data according to a preset wavelength channel sequence, wherein the preset channel sequence is the order of the channel wavelengths.
  • a data transmission apparatus which is applied to an OLT side of an optical line terminal, and includes: an acquisition module configured to acquire channels of all wavelengths supported by an ONU of the optical network unit; and a ranging module And determining, by the ONU, performing ranging on the channel to obtain a transmission delay of the ONU on a channel of different wavelengths; the first transmission module is configured to adjust a transmission delay on a channel of different wavelengths, And transmitting data on the adjusted transmission delay channel; wherein the adjusted transmission delay is such that the time required for data transmitted on all channels of the OLT to reach the ONU is equal.
  • the apparatus further includes: a setting module configured to transmit data to each of the two time sequential interval channels before the OLT simultaneously transmits data to the ONU on the plurality of channels The difference of the start transmission time is set to be greater than a predetermined value; and the second transmission module is configured to separately transmit data to the plurality of channels according to the start transmission time.
  • the predetermined value is twice the downlink data jitter time.
  • the device further includes: an allocating module, configured to allocate an uplink bandwidth to the ONU on the multiple channels after the ranging module performs ranging on the channel by the ranging module, where All uplink bandwidth start times are different on different channels; the ONU transmits data on multiple channels according to the start time corresponding to the channel.
  • an allocating module configured to allocate an uplink bandwidth to the ONU on the multiple channels after the ranging module performs ranging on the channel by the ranging module, where All uplink bandwidth start times are different on different channels; the ONU transmits data on multiple channels according to the start time corresponding to the channel.
  • the ONU transmits data according to a rule negotiated with the OLT, where the rule of negotiation is to sequentially transmit data according to the wavelength of the channel.
  • the device further includes: a storage module, configured to store information of the acquired channel and information of the transmission delay.
  • the device further includes: a third transmission module, configured to allocate data to the plurality of channels and transmit to the ONU according to a preset channel sequence, wherein the preset channel sequence is a channel wavelength level order.
  • a third transmission module configured to allocate data to the plurality of channels and transmit to the ONU according to a preset channel sequence, wherein the preset channel sequence is a channel wavelength level order.
  • the adjusting module includes: a selecting unit, configured to select a maximum transmission delay from the measured transmission delay; and the processing unit is configured to remove the maximum transmission delay minus the transmission delay value of the other channel. 2, the additional transmission delay value that needs to be added to the uplink and downlink of the other channel is obtained; and the calculating unit is configured to add the transmission delay of the other channel to the additional transmission delay value so that all channels uplink and downlink data are transmitted.
  • the extension is the same.
  • a data transmission apparatus which is applied to an ONU measurement of an optical network unit, and includes: a processing module configured to receive an optical line terminal OLT for transmission on an adjusted transmission delay channel. Data; wherein the adjusted transmission delay is such that the time required for data transmitted on all channels of the OLT to reach the ONU is equal.
  • the processing module includes: a first processing unit, configured to receive and group data of multiple channels according to an order of receiving time of the first bit of each received data; or, the second processing a unit, configured to group data according to a preset wavelength channel order,
  • the preset channel order is the order of the channel wavelengths.
  • a data transmission system comprising the above-described apparatus applied to any one of the OLT side and the above-described apparatus applied to any one of the ONU sides.
  • a storage medium is also provided.
  • the storage medium is arranged to store program code for performing the following steps:
  • the optical line terminal OLT acquires channels of all wavelengths supported by the ONUs of the optical network unit; the OLT performs ranging on the channels by the ONUs to obtain transmission delays of the ONUs on channels of different wavelengths; Adjusting the transmission delay on the channels of different wavelengths, and transmitting data on the adjusted transmission delay channel; wherein the adjusted transmission delay causes the data transmitted on all channels of the OLT to reach the ONU
  • the time required is equal.
  • the storage medium is further arranged to store program code for performing the following steps:
  • the OLT Before the OLT simultaneously transmits data to the ONU on the plurality of channels, the OLT sets the difference of the start transmission time of the data transmission data to every two time sequential interval channels to be greater than a predetermined value; the OLT starts according to the The transmission time transfers the data to multiple channels separately.
  • the storage medium is further arranged to store program code for performing the following steps:
  • the OLT After the OLT performs ranging on the channel, the OLT allocates an uplink bandwidth to the ONU on multiple channels, where all uplink bandwidth start times on different channels are different, and the ONU follows The start time corresponding to the channel transmits data on multiple channels.
  • the optical line terminal OLT acquires channels of all wavelengths supported by the ONUs of the optical network unit, and performs ranging on the channels of the ONUs to obtain transmission delays of the ONUs on different wavelength channels, and further, for different wavelengths.
  • the transmission delay on the channel is adjusted.
  • the purpose of adjusting the transmission delay is to make the time required for the data transmitted on all channels of the OLT to reach the ONU to be equal, ensuring the order of the data in the process of transmitting data, and solving the related technology.
  • FIG. 1 is a schematic structural diagram of a passive optical network in a related art
  • FIG. 2 is a flowchart 1 of a method for transmitting data according to an embodiment of the present invention
  • FIG. 3 is a second flowchart of a method for transmitting data according to an embodiment of the present invention.
  • FIG. 4 is a block diagram 1 of a structure of a data transmission apparatus according to an embodiment of the present invention.
  • FIG. 5 is a structural block diagram 2 of a data transmission apparatus according to an embodiment of the present invention.
  • FIG. 6 is a structural block diagram of a data transmission system in accordance with an alternative embodiment of the present invention.
  • FIG. 7 is a topological diagram of a time division wavelength division PON according to the present embodiment.
  • FIG. 2 is a flowchart 1 of a method for transmitting data according to an embodiment of the present invention. As shown in FIG. 2, the steps of the method include:
  • Step S202 The optical line terminal OLT acquires channels of all wavelengths supported by the optical network unit ONU;
  • Step S204 The OLT performs ranging on the channel by the ONU to obtain a transmission delay of the ONU on the channel of different wavelengths;
  • Step S206 The OLT adjusts the transmission delay on the channels of different wavelengths, and transmits data on the channel of the adjusted transmission delay;
  • the adjusted transmission delay is such that the time required for the data transmitted on all channels of the OLT to reach the ONU is equal. For example, shortening the transmission time, or adjusting the transmission delay to other transmission delays.
  • the optical line terminal OLT acquires channels of all wavelengths supported by the ONUs of the optical network unit, and performs ranging on the channels by the ONUs to obtain transmission delays of the ONUs on channels of different wavelengths, and further The transmission delays on the channels of different wavelengths are adjusted.
  • the purpose of adjusting the transmission delay is to make the time required for the data transmitted on all channels of the OLT to reach the ONU to be equal, and to ensure the order of the data in the process of transmitting data.
  • the OLT can store the information of the acquired channel and the information of the transmission delay.
  • the method in this embodiment may further include:
  • Step S208 Before the OLT simultaneously transmits data to the ONU on multiple channels, the OLT sets the difference of the start transmission time of the data transmission to each of the two time sequential interval channels to be greater than a predetermined value;
  • the predetermined value is preferably twice the downlink data jitter time.
  • Step S210 The OLT transmits the data to the plurality of channels separately according to the start transmission time.
  • the difference of the start transmission time of the data transmitted to each of the two time sequential interval channels is set to be larger than
  • the predetermined value that is, the start transmission time of the data transmitted on two consecutive channels is separated by a predetermined value, and the data received by the ONU is also spaced in time to ensure that the received data is in order, and there is no data disorder. Order, and group the ordered data.
  • the method in this embodiment may further include:
  • Step S212 After the OLT performs ranging on the channel, the OLT allocates uplink bandwidth to the ONU on multiple channels, where all uplink bandwidth start times on different channels are different; the OLT corresponds to the channel. Start time transfers data on multiple channels.
  • the S212 is configured to set the start time of the uplink bandwidth allocated to the multiple channels to be different, and transmit data on the multiple channels according to the start time, and the same receiving end may also be configured according to the same.
  • the data is received and packaged at the start time to further ensure the order of the data.
  • the manner in which the OLT transmits data on multiple channels according to the start time corresponding to the channel may be: the ONU negotiates with the OLT.
  • the rule transmits data, wherein the negotiated rule is to transmit data in the order of the wavelength of the channel.
  • the order of the high and low levels involved in this embodiment may be from high to low, or from low to high, and may be selected according to actual conditions. The same applies to the high and low order in the following embodiments.
  • the method of the embodiment further includes: the OLT allocates data to the multiple channels according to a preset channel sequence and transmits the data to the ONU, where the preset channel sequence is a channel. The order of the wavelengths.
  • adjusting the transmission delay on the channel of different wavelengths for the OLT involved in step S206 in this embodiment includes:
  • S206-1 The OLT selects a maximum transmission delay from the measured transmission delays
  • the OLT divides the maximum transmission delay by the transmission delay value of other channels and divides it by 2, and obtains an additional transmission delay value that needs to be added to the uplink and downlink of other channels;
  • S206-3 The OLT adds the transmission delay of other channels to the additional transmission delay value so that the uplink and downlink data transmission delay values of all channels are the same.
  • This embodiment 2 corresponds to the first embodiment.
  • the first embodiment is described from the OLT side, and the second embodiment is described from the ONU side.
  • FIG. 3 is a second flowchart of a method for transmitting data according to an embodiment of the present invention. As shown in FIG. 3, the steps of the method include:
  • Step S302 The optical network unit ONU receives data sent by the optical line terminal OLT on the channel of the adjusted transmission delay;
  • the adjusted transmission delay is such that the time required for the data sent on all channels of the OLT to reach the ONU is equal.
  • the manner in which the optical network unit ONU receives the data sent by the optical line terminal OLT on the channel of the adjusted transmission delay can be implemented as follows:
  • Step S302-1 The ONU groups the data of the plurality of channels in the order of the received time of the first bit of each received data;
  • Step S302-2 The ONU groups the data according to a preset wavelength channel sequence, wherein the preset channel order is the order of the channel wavelengths.
  • the method according to the above embodiment can be implemented by means of software plus a necessary general hardware platform, and of course, by hardware, but in many cases, the former is A better implementation.
  • the technical solution of the present invention which is essential or contributes to the prior art, may be embodied in the form of a software product stored in a storage medium (such as ROM/RAM, disk,
  • the optical disc includes a number of instructions for causing a terminal device (which may be a cell phone, a computer, a server, or a network device, etc.) to perform the methods described in various embodiments of the present invention.
  • the present invention also provides a data transmission device, which is used to implement the above embodiments and preferred embodiments, and has not been described again.
  • the term "module” may implement a combination of software and/or hardware of a predetermined function.
  • the apparatus described in the following embodiments is preferably implemented in software, hardware, or a combination of software and hardware, is also possible and contemplated.
  • the apparatus is applied to an OLT side of an optical line terminal.
  • the apparatus includes: an acquisition module 42 configured to acquire an ONU of an optical network unit. Supported channels of all wavelengths; ranging module 44, and acquisition
  • the module 42 is coupled and configured to measure the transmission delay of the ONU on the channel of the ONU on the channel of the different wavelengths.
  • the first transmission module 46 is coupled to the ranging module 44 and is set to be on the channel of different wavelengths. The transmission delay is adjusted and the data is transmitted on the channel of the adjusted transmission delay;
  • the adjusted transmission delay is such that the time required for the data transmitted on all channels of the OLT to reach the ONU is equal.
  • the apparatus in this embodiment may further include: a setting module, configured to be different from a start transmission time of transmitting data to each of the two time sequential interval channels before the OLT simultaneously transmits data to the ONU on the plurality of channels.
  • the value is set to be greater than a predetermined value; the second transmission module is configured to transmit data to the plurality of channels separately according to the start transmission time.
  • the predetermined value is twice the jitter time of the downlink data.
  • the apparatus in this embodiment may further include: an allocation module, configured to: after the ranging module performs ranging on the channel, the ranging module allocates uplink bandwidth to the ONU on multiple channels, where different All upstream bandwidth start times on the channel are different; the OUN transmits data on multiple channels according to the start time corresponding to the channel.
  • an allocation module configured to: after the ranging module performs ranging on the channel, the ranging module allocates uplink bandwidth to the ONU on multiple channels, where different All upstream bandwidth start times on the channel are different; the OUN transmits data on multiple channels according to the start time corresponding to the channel.
  • the rules negotiated by the ONU and the OLT perform data transmission, and the rule of the negotiation is to sequentially transmit data according to the wavelength of the channel.
  • the device further includes: a storage module, configured to store information of the acquired channel and information of the transmission delay.
  • the device further includes: a third transmission module configured to allocate data to the plurality of channels and transmit to the ONU according to a preset channel sequence, wherein the preset channel order is a sequence of channel wavelengths.
  • the adjusting module 36 in this embodiment includes: a selecting unit configured to select a maximum transmission delay from the measured transmission delay; and a processing unit configured to reduce the maximum transmission delay by other channels. After the value is divided by 2, the additional transmission delay value that needs to be added to the uplink and downlink of the other channel is obtained; and the calculating unit is configured to add the transmission delay of the other channel to the The extra transmission delay value makes the uplink and downlink data transmission delay values of all channels the same.
  • FIG. 5 is a block diagram 2 of a structure of a data transmission apparatus according to an embodiment of the present invention.
  • the apparatus is applied to an ONU measurement of an optical network unit.
  • the apparatus includes: a processing module 52 configured to receive an optical line terminal OLT.
  • the processing module includes: a first processing unit, configured to receive and group data of multiple channels according to an order of receiving time of the first bit of each received data; or, the second processing unit The data is grouped according to a preset wavelength channel sequence, wherein the preset channel order is the order of the channel wavelengths.
  • each of the above modules may be implemented by software or hardware.
  • the foregoing may be implemented by, but not limited to, the foregoing modules are all located in the same processor; or, the above modules are in any combination.
  • the forms are located in different processors.
  • FIG. 6 is a structural block diagram of a data transmission system according to an embodiment of the present invention. As shown in FIG. 6, the system includes the apparatus in the above embodiment 3 and the apparatus in the embodiment 4.
  • the OLT includes multiple wavelength channels, each of which uses one downlink wavelength and one uplink wavelength, and each group manages one group of ONUs, and the group of ONUs uses the time division multiplexing access mode to send uplink data, which is different.
  • Different groups of ONUs on the wavelength channel use WDM to transmit data.
  • An ONU can support multiple wavelength channels to simultaneously transmit and receive data. The OLT and ONU use the following main steps to send data and receive data.
  • FIG. 7 is a schematic topological diagram of a time division wavelength division PON according to the embodiment, and the method steps of this embodiment based on FIG. 7 include:
  • Step S402 After the OLT obtains all the wavelength channels supported by the ONU, the ONU is in the Ranging is performed on a supported channel to obtain the transmission delay value of the ONU in different wavelength channels.
  • the loop delay of the ONU1 measured by the OLT in channel 1 is t1
  • the loop delay of the ONU1 measured by the OLT in channel 2 is t2
  • the difference between the two ends of the fiber is (t2-t1)*c/(n1+n2
  • the absolute value of c is the speed of light
  • n1 is the refractive index of the light wave of the downward transmission optical signal in the channel in the fiber
  • n2 is the refractive index of the light wave of the upward transmission optical signal in the channel in the fiber.
  • the time difference of the transmitted downlink signal caused by the difference in the light on the two channels is (t2-t1)*c/(n1+n2)/n1.
  • the OLT adds the above delay time difference to the channel with small transmission delay and then sends the downlink data, so that the time required for the downlink data sent by all the channels of the OLT to reach the ONU is equal. All working channel information of the ONU stored locally by the OLT and downlink data delay information corresponding to each group of working channels.
  • Step S404 When the OLT sends the downlink data to the ONU on multiple channels simultaneously, the difference between the start transmission time of the downlink data of each two channels is greater than twice the downlink data drift time.
  • Step S406 When the OLT sends the data to the ONU on the multiple channels, the OLT distributes the plurality of data packets to the plurality of working channels according to the start transmission time of the downlink data.
  • Step S408 When receiving the data, the ONU receives data on all currently open working channels, and performs data packet of multiple channels according to the receiving time order of the first bit of each data packet.
  • Step S410 When the OLT allocates the uplink bandwidth to the ONU, if the uplink bandwidth is allocated to the ONUs in multiple channels at the same time, the start times of all the uplink bandwidths on different channels are different, and the ONUs send packets in the order of the uplink start time, if there are two on different channels. For the same uplink time, the ONU and OLT send data sequentially from low to high wavelength channels or high to low wavelength channels by default.
  • Step S412 When the OLT receives the uplink data, according to the start time grouping of the uplink bandwidth allocation allocated by the OLT to the ONU, if there are two identical uplink times on different channels, the ONU and the OLT default from low to high wavelength channels or from high. Receive data sequentially to the low wavelength channel.
  • step S406 when the OLT sends data to the ONU on the multiple channels, the OLT distributes the plurality of data packets to the plurality of working channels according to the start transmission time of the downlink data.
  • the OLT may also be used.
  • the OLT distributes the data packets to the ONUs in order from low to high wavelength channels or high to low wavelength channels.
  • the ONU receives data, the multi-channel data packet sequence is restored according to the same order in which the OLT transmits data.
  • Embodiments of the present invention also provide a storage medium.
  • the foregoing storage medium may be configured to store program code for performing the following steps:
  • Step S1 The optical line terminal OLT acquires channels of all wavelengths supported by the optical network unit ONU;
  • Step S2 The OLT performs ranging on the channel by the ONU to obtain a transmission delay of the ONU on the channel of different wavelengths;
  • Step S3 The OLT adjusts the transmission delay on the channels of different wavelengths, and transmits the data on the channel of the adjusted transmission delay;
  • the adjusted transmission delay is such that the time required for the data transmitted on all channels of the OLT to reach the ONU is equal. For example, shortening the transmission time, or adjusting the transmission delay to other transmission delays.
  • modules or steps of the present invention described above can be implemented by a general-purpose computing device that can be centralized on a single computing device or distributed across a network of multiple computing devices. Alternatively, they may be implemented by program code executable by the computing device such that they may be stored in the storage device by the computing device and, in some cases, may be different from the order herein.
  • the steps shown or described are performed, or they are separately fabricated into individual integrated circuit modules, or a plurality of modules or steps thereof are fabricated as a single integrated circuit module.
  • the invention is not limited to any specific combination of hardware and software.
  • the optical line terminal OLT acquires channels of all wavelengths supported by the ONUs of the optical network unit, and performs ranging on the channels of the ONUs to obtain transmission delays of the ONUs on different wavelength channels, and further, for different wavelengths.
  • the transmission delay on the channel is adjusted.
  • the purpose of adjusting the transmission delay is to make the time required for the data transmitted on all channels of the OLT to reach the ONU to be equal, ensuring the order of the data in the process of transmitting data, and solving the related technology.

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Abstract

本发明提供了一种数据的传输方法、装置及系统，其中该方法包括：光线路终端OLT获取光网络单元ONU所支持的所有波长的通道；OLT对ONU在通道上进行测距得到ONU在不同波长的通道上的传输时延；OLT对不同波长的通道上的传输时延进行调整，并在调整后的传输时延的通道上传输数据；其中，调整后的传输时延使得OLT所有通道上传输的数据到达ONU所需的时间相等。通过本发明，解决了相关技术中在多组波长通道上发送或接收数据存在乱序的问题。

Description

数据的传输方法、装置及系统 技术领域
本发明涉及通信领域，具体而言，涉及一种数据的传输方法、装置及系统。
背景技术
随着网络技术的发展，可以利用网络传输大量的语音、数据、视频等业务，因此对带宽的要求不断提高，无源光网络(Passive Optical Network，简称为PON)就是在这种需求下产生的。
PON系统的拓扑结构如图1所示，图1是相关技术中无源光网络的组成结构示意图，PON系统通常由局侧的光线路终端(Optical Line Terminal，简称为OLT)、用户侧的光网络单元(Optical Network Unit，简称为ONU)和光分配网络(Optical Distribution Network，简称为ODN)组成，通常采用点到多点的网络结构。ODN由单模光纤和光分路器、光连接器等无源光器件组成，为OLT和ONU之间的物理连接提供光传输媒质。为了在节省光纤资源情况下提升线路速率，提出了在一根光纤中多个波长上同时传输数据，同一波长上不同ONU的数据下行采用时分复用方式，上行采用时分复用接入方式。这称为波分时分PON系统，每个OLT管理多组ONU，在同一上行波长和下行波长上一组ONU发送上行数据的上行波长相同，并且接收下行数据的下行波长也相同，不同上行波长和下行波长上ONU组发送上行数据的上行波长不同，并且接收下行数据的下行波长也不同。
为了支持ONU能够传输超过单通道速率的数据，提出了ONU可以支持在多组波长通道上同时发送和接收数据，在这种架构下，OLT如何将数据发送到多个波长通道上发送给ONU，对于ONU收到后如何将数据包按照OLT发送的顺序组合在一起的问题，相关技术中通过OLT将数据包进行编号，将编号插入到包含数据包的帧结构中，但是现有的PON系统 中的帧结构中没有足够的空间用于携带这个数据包的编号，如果将数据包按照一定的时间顺序发送给ONU，那如果数据链路抖动，造成先发送的数据包晚于后发送的数据包到达接收端，会造成接收方数据包的乱序。
针对相关技术中的上述问题，目前尚未存在有效的解决方案。
发明内容
本发明实施例提供了一种数据的传输方法、装置及系统，以至少解决相关技术中在多组波长通道上发送或接收数据存在乱序的问题。
根据本发明实施例的一个方面，提供了一种数据的传输方法，包括：光线路终端OLT获取光网络单元ONU所支持的所有波长的通道；所述OLT对所述ONU在所述通道上进行测距得到所述ONU在不同波长的通道上的传输时延；所述OLT对不同波长的通道上的传输时延进行调整，并在调整后的传输时延的通道上传输数据；其中，调整后的传输时延使得所述OLT所有通道上传输的数据到达所述ONU所需的时间相等。
可选地，所述方法还包括：在所述OLT在多个通道上向ONU同时传输数据之前，所述OLT将向每两个时间顺序间隔通道传输数据的开始传输时间的差值设置为大于预定值；所述OLT按照所述开始传输时间将数据分别传输到多个通道上。
可选地，所述预定值为下行数据抖动时间的两倍。
可选地，所述方法还包括：在所述OLT对所述ONU在所述通道上进行测距后，所述OLT在多个通道上为所述ONU分配上行带宽，其中，不同通道上所有上行带宽开始时间不同，所述ONU按照与通道对应的开始时间在多个通道上传输数据。
可选地，在不同通道上有两个相同的上行时间时，所述ONU按照与所述OLT协商的规则传输数据，其中，协商的规则为按照通道的波长高低顺序传输数据。
可选地，所述方法还包括：所述OLT存储获取到的通道的信息以及 所述传输时延的信息。
可选地，所述方法还包括：所述OLT按照预设的通道顺序将数据分配到多个通道中并向ONU传输，其中，所述预设的通道顺序为通道波长的高低顺序。
可选地，所述OLT对不同波长的通道上的传输时延进行调整包括：所述OLT从测量到的传输时延中选择最大传输时延；所述OLT将最大传输时延减去其他通道的传输时延值后除以2，得到所述其他通道上下行需要增加的额外传输时延值；所述OLT将所述其他通道的传输时延加上所述额外传输时延值使得所有通道上下行数据传输时延值相同。
根据本发明实施例的另一个方面，提供了一种数据的传输方法，包括：光网络单元ONU接收光线路终端OLT在调整后的传输时延的通道上发送的数据；其中，调整后的传输时延使得所述OLT所有通道上发送的数据到达所述ONU所需的时间相等。
可选地，光网络单元ONU接收光线路终端OLT在调整后的传输时延的通道上发送的数据包括：所述ONU按照接收到的每个数据的第一比特的接收时间的顺序对多个通道的数据进行组包；或，所述ONU按照预设的波长通道顺序对数据进行组包，其中，所述预设的通道顺序为通道波长的高低顺序。
根据本发明实施例的再一个方面，提供了一种数据的传输装置，应用于光线路终端OLT侧，包括：获取模块，设置为获取光网络单元ONU所支持的所有波长的通道；测距模块，设置为对所述ONU在所述通道上进行测距得到所述ONU在不同波长的通道上的传输时延；第一传输模块，设置为对不同波长的通道上的传输时延进行调整，并在调整后的传输时延的通道上传输数据；其中，调整后的传输时延使得所述OLT所有通道上传输的数据到达所述ONU所需的时间相等。
可选地，所述装置还包括：设置模块，设置为在所述OLT在多个通道上向ONU同时传输数据之前，将向每两个时间顺序间隔通道传输数据 的开始传输时间的差值设置为大于预定值；第二传输模块，设置为按照所述开始传输时间将数据分别传输到多个通道上。
可选地，所述预定值为下行数据抖动时间的两倍。
可选地，所述装置还包括：分配模块，设置为在所述测距模块对所述ONU在所述通道上进行测距后，在多个通道上为所述ONU分配上行带宽，其中，不同通道上所有上行带宽开始时间不同；所述ONU按照与通道对应的开始时间在多个通道上传输数据。
可选地，在不同通道上有两个相同的上行时间时，所述ONU按照与所述OLT协商的规则传输数据，其中，协商的规则为按照通道的波长高低顺序传输数据。
可选地，所述装置还包括：存储模块，设置为存储获取到的通道的信息以及所述传输时延的信息。
可选地，所述装置还包括：第三传输模块，设置为按照预设的通道顺序将数据分配到多个通道中并向ONU传输，其中，所述预设的通道顺序为通道波长的高低顺序。
可选地，所述调整模块包括：选择单元，设置为从测量到的传输时延中选择最大传输时延；处理单元，设置为将最大传输时延减去其他通道的传输时延值后除以2，得到所述其他通道上下行需要增加的额外传输时延值；计算单元，设置为将所述其他通道的传输时延加上所述额外传输时延值使得所有通道上下行数据传输时延值相同。
根据本发明实施例的再一个方面，提供了一种数据的传输装置，应用于光网络单元ONU测，包括：处理模块，设置为接收光线路终端OLT在调整后的传输时延的通道上传输的数据；其中，调整后的传输时延使得所述OLT所有通道上发送的数据到达所述ONU所需的时间相等。
可选地，所述处理模块包括：第一处理单元，设置为按照接收到的每个数据的第一比特的接收时间的顺序对多个通道的数据进行接收并组包；或，第二处理单元，设置为按照预设的波长通道顺序对数据进行组包，其 中，所述预设的通道顺序为通道波长的高低顺序。
根据本发明实施例的又一个方面，提供了一种数据的传输系统，包括上述应用于OLT侧任一项的装置和上述应用于ONU侧的任一项的装置。
根据本发明的又一个实施例，还提供了一种存储介质。该存储介质设置为存储用于执行以下步骤的程序代码：
光线路终端OLT获取光网络单元ONU所支持的所有波长的通道；所述OLT对所述ONU在所述通道上进行测距得到所述ONU在不同波长的通道上的传输时延；所述OLT对不同波长的通道上的传输时延进行调整，并在调整后的传输时延的通道上传输数据；其中，调整后的传输时延使得所述OLT所有通道上传输的数据到达所述ONU所需的时间相等。
可选地，存储介质还设置为存储用于执行以下步骤的程序代码：
在所述OLT在多个通道上向ONU同时传输数据之前，所述OLT将向每两个时间顺序间隔通道传输数据的开始传输时间的差值设置为大于预定值；所述OLT按照所述开始传输时间将数据分别传输到多个通道上。
可选地，存储介质还设置为存储用于执行以下步骤的程序代码：
在所述OLT对所述ONU在所述通道上进行测距后，所述OLT在多个通道上为所述ONU分配上行带宽，其中，不同通道上所有上行带宽开始时间不同，所述ONU按照与通道对应的开始时间在多个通道上传输数据。
通过本发明实施例，光线路终端OLT获取光网络单元ONU所支持的所有波长的通道，并对ONU在通道上进行测距得到ONU在不同波长的通道上的传输时延，进而对不同波长的通道上的传输时延进行调整，调整传输时延的目的是为了使得OLT所有通道上传输的数据到达ONU所需的时间相等，保证了在传输数据的过程中数据的有序，解决了相关技术中在多组波长通道上发送或接收数据存在乱序的问题。
附图说明
此处所说明的附图用来提供对本发明的进一步理解，构成本申请的一部分，本发明的示意性实施例及其说明用于解释本发明，并不构成对本发明的不当限定。在附图中：
图1是相关技术中无源光网络的组成结构示意图；
图2是根据本发明实施例的数据的传输方法的流程图一；
图3是根据本发明实施例的数据的传输方法的流程图二；
图4是根据本发明实施例的数据的传输装置的结构框图一；
图5是根据本发明实施例的数据的传输装置的结构框图二；
图6是根据本发明可选实施例的数据的传输系统的结构框图；
图7是根据本实施例的时分波分PON的拓扑示意图。
具体实施方式
下文中将参考附图并结合实施例来详细说明本发明。需要说明的是，在不冲突的情况下，本申请中的实施例及实施例中的特征可以相互组合。
需要说明的是，本发明的说明书和权利要求书及上述附图中的术语“第一”、“第二”等是用于区别类似的对象，而不必用于描述特定的顺序或先后次序。
实施例1
图2是根据本发明实施例的数据的传输方法的流程图一，如图2所示，该方法的步骤包括：
步骤S202：光线路终端OLT获取光网络单元ONU所支持的所有波长的通道；
步骤S204：OLT对ONU在通道上进行测距得到ONU在不同波长的通道上的传输时延；
步骤S206：OLT对不同波长的通道上的传输时延进行调整，并在调整后的传输时延的通道上传输数据；
其中，调整后的传输时延使得OLT所有通道上传输的数据到达ONU所需的时间相等。例如，将传输时延长的缩短，或将传输时延短调整与其他传输时延一直。
通过上述的步骤S202至步骤S206，光线路终端OLT获取光网络单元ONU所支持的所有波长的通道，并对ONU在通道上进行测距得到ONU在不同波长的通道上的传输时延，进而对不同波长的通道上的传输时延进行调整，调整传输时延的目的是为了使得OLT所有通道上传输的数据到达ONU所需的时间相等，保证了在传输数据的过程中数据的有序，解决了相关技术中在多组波长通道上发送或接收数据存在乱序的问题。
需要说明的是，OLT可以存储获取到的通道的信息以及传输时延的信息。
在本实施例的可选实施方式中，本实施例中的方法还可以包括：
步骤S208：在OLT在多个通道上向ONU同时传输数据之前，OLT将向每两个时间顺序间隔通道传输数据的开始传输时间的差值设置为大于预定值；
其中，该预定值优选为下行数据抖动时间的两倍。
步骤S210：OLT按照开始传输时间将数据分别传输到多个通道上。
通过该步骤S208和步骤S210，对于传输到通道的上数据的开始传输时间，在本实施例中也是有规则，即将向每两个时间顺序间隔通道传输数据的开始传输时间的差值设置为大于预定值，也就是说两个连续的通道上传输数据的开始传输时间是相隔预定值，进而ONU接收到的数据在时间上也是间隔的以保证接收到的数据有序，不会存在数据的乱序，并对有序的数据进行组包。
在本实施例的另一个可选实施方式中，本实施例的方法还可以包括：
步骤S212：在OLT对所述ONU在所述通道上进行测距后，OLT在多个通道上为ONU分配上行带宽，其中，不同通道上所有上行带宽开始时间不同；该OLT按照与通道对应的开始时间在多个通道上传输数据。
与上述S208和S210类似的是，该S212采用的是对多个通道分配的上行带宽的开始时间设置为不同，并根据该开始时间在多个通道上传输数据，同样的接收端也可以根据该开始时间对数据进行接收并组包，进一步保证了数据的有序。
在本实施例的具体实施方式中，在不同通道上有两个相同的上行时间时，对于上述OLT按照与通道对应的开始时间在多个通道上传输数据的方式可以是：ONU按照与OLT协商的规则传输数据，其中，协商的规则为按照通道的波长高低顺序传输数据。
需要说明的是，本实施例中涉及到的高低顺序，可以是从高到低，也可是从低到高，根据实际情况进行选择，下述实施例中涉及到高低顺序时也是同样的。
在本实施例的另一个可选实施方式中，本实施例的方法还包括：OLT按照预设的通道顺序将数据分配到多个通道中并向ONU传输，其中，预设的通道顺序为通道波长的高低顺序。
在本实施例的另一个可选实施方式中，对于本实施例步骤S206中涉及到的OLT对不同波长的通道上的传输时延进行调整包括：
S206-1：OLT从测量到的传输时延中选择最大传输时延；
S206-2：OLT将最大传输时延减去其他通道的传输时延值后除以2，得到其他通道上下行需要增加的额外传输时延值；
S206-3：OLT将其他通道的传输时延加上额外传输时延值使得所有通道上下行数据传输时延值相同。
实施例2
本实施例2与实施例1是对应的，实施例1是从OLT侧进行描述，本实施例2是从ONU侧进行描述；
图3是根据本发明实施例的数据的传输方法的流程图二，如图3所示，该方法的步骤包括：
步骤S302：光网络单元ONU接收光线路终端OLT在调整后的传输时延的通道上发送的数据；
其中，调整后的传输时延使得OLT所有通道上发送的数据到达ONU所需的时间相等。
对于该步骤S302光网络单元ONU接收光线路终端OLT在调整后的传输时延的通道上发送的数据的方式，可以通过如下方式来实现：
步骤S302-1：ONU按照接收到的每个数据的第一比特的接收时间的顺序对多个通道的数据进行组包；
步骤S302-2：ONU按照预设的波长通道顺序对数据进行组包，其中，预设的通道顺序为通道波长的高低顺序。
通过以上的实施方式的描述，本领域的技术人员可以清楚地了解到根据上述实施例的方法可借助软件加必需的通用硬件平台的方式来实现，当然也可以通过硬件，但很多情况下前者是更佳的实施方式。基于这样的理解，本发明的技术方案本质上或者说对现有技术做出贡献的部分可以以软件产品的形式体现出来，该计算机软件产品存储在一个存储介质(如ROM/RAM、磁碟、光盘)中，包括若干指令用以使得一台终端设备(可以是手机，计算机，服务器，或者网络设备等)执行本发明各个实施例所述的方法。
在本发明中还提供了一种数据的传输装置，该装置用于实现上述实施例及优选实施方式，已经进行过说明的不再赘述。如以下所使用的，术语“模块”可以实现预定功能的软件和/或硬件的组合。尽管以下实施例所描述的装置较佳地以软件来实现，但是硬件，或者软件和硬件的组合的实现也是可能并被构想的。
实施例3
图4是根据本发明实施例的数据的传输装置的结构框图一，该装置应用于光线路终端OLT侧，如图4所示，该装置包括：获取模块42，设置为获取光网络单元ONU所支持的所有波长的通道；测距模块44，与获取 模块42耦合连接，设置为对ONU在通道上进行测距得到ONU在不同波长的通道上的传输时延；第一传输模块46，与测距模块44耦合连接，设置为对不同波长的通道上的传输时延进行调整，并在调整后的传输时延的通道上传输数据；
其中，调整后的传输时延使得OLT所有通道上传输的数据到达ONU所需的时间相等。
可选地，本实施例中的装置还可以包括：设置模块，设置为在OLT在多个通道上向ONU同时传输数据之前，将向每两个时间顺序间隔通道传输数据的开始传输时间的差值设置为大于预定值；第二传输模块，设置为按照开始传输时间将数据分别传输到多个通道上。其中，预定值为下行数据抖动时间的两倍。
可选地，本实施例中的装置还可以包括：分配模块，设置为测距模块对所述ONU在所述通道上进行测距后，在多个通道上为ONU分配上行带宽，其中，不同通道上所有上行带宽开始时间不同；该OUN按照与通道对应的开始时间在多个通道上传输数据。
需要说明的是，在不同通道上有两个相同的上行时间时，该ONU与OLT协商的规则进行数据的传输，该协商的规则为按照通道的波长高低顺序传输数据。
可选地，装置还包括：存储模块，设置为存储获取到的通道的信息以及传输时延的信息。
可选地，装置还包括：第三传输模块，设置为按照预设的通道顺序将数据分配到多个通道中并向ONU传输，其中，预设的通道顺序为通道波长的高低顺序。
可选地，本实施例中的调整模块36包括：选择单元，设置为从测量到的传输时延中选择最大传输时延；处理单元，设置为将最大传输时延减去其他通道的传输时延值后除以2，得到所述其他通道上下行需要增加的额外传输时延值；计算单元，设置为将所述其他通道的传输时延加上所述 额外传输时延值使得所有通道上下行数据传输时延值相同。
实施例4
图5是根据本发明实施例的数据的传输装置的结构框图二，该装置应用于光网络单元ONU测，如图5所示，该装置包括：处理模块52，设置为接收光线路终端OLT在调整后的传输时延的通道上传输的数据；其中，调整后的传输时延使得OLT所有通道上发送的数据到达ONU所需的时间相等。
可选地，该处理模块包括：第一处理单元，设置为按照接收到的每个数据的第一比特的接收时间的顺序对多个通道的数据进行接收并组包；或，第二处理单元，设置为按照预设的波长通道顺序对数据进行组包，其中，预设的通道顺序为通道波长的高低顺序。
需要说明的是，上述各个模块是可以通过软件或硬件来实现的，对于后者，可以通过以下方式实现，但不限于此：上述模块均位于同一处理器中；或者，上述各个模块以任意组合的形式分别位于不同的处理器中。
实施例5
图6是根据本发明实施例的数据的传输系统的结构框图，如图6所示，该系统包括上述实施例3中的装置和实施例4中的装置。
实施例6
在本实施例中，OLT包括多个波长通道，每个通道上使用一个下行波长和一个上行波长，每个通道上管理一组ONU，该组ONU采用时分复用接入方式发送上行数据，不同波长通道上的不同组ONU采用波分复用方式发送数据。一个ONU可以支持多个波长通道同时发送和接收数据。OLT和ONU采用下面的主要步骤发送数据和接收数据。
图7是根据本实施例的时分波分PON的拓扑示意图，基于图7本实施例的方法步骤包括：
步骤S402：OLT获得ONU支持的所有波长通道后，对该ONU在所 有支持的通道上进行测距，获得ONU在不同波长通道的传输时延值。OLT在通道1测得ONU1的环路时延为t1，OLT在通道2测得ONU1的环路时延为t2，则两端光纤的差值为(t2-t1)*c/(n1+n2)的绝对值，c为光速，n1为通道内的下行传输光信号的光波在光纤内的折射率，n2为通道内的上行传输光信号的光波在光纤内的折射率。两个通道上的光线差值导致的传输下行信号的时间差为(t2-t1)*c/(n1+n2)/n1。OLT对传输时延小的通道加上上述额外的延时时间差后发送下行数据，使得所有通道OLT发送的下行数据到达ONU所需的时间相等。OLT本地存储的ONU所有工作通道信息和对应每组工作通道的下行数据时延信息。
步骤S404：OLT给ONU在多个通道上同时传输下行数据时，每两个通道下行数据的开始传输时间的差值要大于2倍的下行数据漂移时间。
步骤S406：OLT给ONU在上述多个通道上发送数据时，OLT将多个数据包按照下行数据的开始传输时间顺序分到上述多个工作通道上发送。
步骤S408：ONU接收数据时，在当前所有打开的工作通道上接收数据，并按照每个数据包的第一比特的接收时间顺序进行多个通道的数据组包。
步骤S410：OLT给ONU分配上行带宽时，如果同时在多个通道给ONU分配上行带宽，则不同通道上所有上行带宽开始时间不同，ONU发包顺序按照上行开始时间顺序发包，如果不同通道上有两个相同的上行时间，ONU和OLT默认从低到高波长通道或者从高到低波长通道顺序发送数据。
步骤S412：OLT接收上行数据时，按照OLT给ONU分配的上行带宽分配的开始时间顺序组包，如果不同通道上有两个相同的上行时间，ONU和OLT默认从低到高波长通道或者从高到低波长通道顺序接收数据。
步骤S406中，OLT给ONU在上述多个通道上发送数据时，OLT将多个数据包按照下行数据的开始传输时间顺序分到上述多个工作通道上发送；在其他实施例中，也可以OLT给ONU在多个通道发送下行数据时， OLT按照从低到高波长通道或者从高到低波长通道顺序把数据包分配到多个通道上，发送给ONU；ONU接收数据时，按照OLT发送数据的相同顺序恢复多通道的数据包顺序。
本发明的实施例还提供了一种存储介质。可选地，在本实施例中，上述存储介质可以被设置为存储用于执行以下步骤的程序代码：
步骤S1：光线路终端OLT获取光网络单元ONU所支持的所有波长的通道；
步骤S2：OLT对ONU在通道上进行测距得到ONU在不同波长的通道上的传输时延；
步骤S3：OLT对不同波长的通道上的传输时延进行调整，并在调整后的传输时延的通道上传输数据；
其中，调整后的传输时延使得OLT所有通道上传输的数据到达ONU所需的时间相等。例如，将传输时延长的缩短，或将传输时延短调整与其他传输时延一直。
可选地，本实施例中的具体示例可以参考上述实施例及可选实施方式中所描述的示例，本实施例在此不再赘述。
显然，本领域的技术人员应该明白，上述的本发明的各模块或各步骤可以用通用的计算装置来实现，它们可以集中在单个的计算装置上，或者分布在多个计算装置所组成的网络上，可选地，它们可以用计算装置可执行的程序代码来实现，从而，可以将它们存储在存储装置中由计算装置来执行，并且在某些情况下，可以以不同于此处的顺序执行所示出或描述的步骤，或者将它们分别制作成各个集成电路模块，或者将它们中的多个模块或步骤制作成单个集成电路模块来实现。这样，本发明不限制于任何特定的硬件和软件结合。
以上所述仅为本发明的优选实施例而已，并不用于限制本发明，对于本领域的技术人员来说，本发明可以有各种更改和变化。凡在本发明的精神和原则之内，所作的任何修改、等同替换、改进等，均应包含在本发明的保护范围之内。
工业实用性
通过本发明实施例，光线路终端OLT获取光网络单元ONU所支持的所有波长的通道，并对ONU在通道上进行测距得到ONU在不同波长的通道上的传输时延，进而对不同波长的通道上的传输时延进行调整，调整传输时延的目的是为了使得OLT所有通道上传输的数据到达ONU所需的时间相等，保证了在传输数据的过程中数据的有序，解决了相关技术中在多组波长通道上发送或接收数据存在乱序的问题。

Claims (21)

  1. 一种数据的传输方法，包括：
    光线路终端OLT获取光网络单元ONU所支持的所有波长的通道；
    所述OLT对所述ONU在所述通道上进行测距得到所述ONU在不同波长的通道上的传输时延；
    所述OLT对不同波长的通道上的传输时延进行调整，并在调整后的传输时延的通道上传输数据；
    其中，调整后的传输时延使得所述OLT所有通道上传输的数据到达所述ONU所需的时间相等。
  2. 根据权利要求1所述的方法，其中，所述方法还包括：
    在所述OLT在多个通道上向ONU同时传输数据之前，所述OLT将向每两个时间顺序间隔通道传输数据的开始传输时间的差值设置为大于预定值；
    所述OLT按照所述开始传输时间将数据分别传输到多个通道上。
  3. 根据权利要求2所述的方法，其中，所述预定值为下行数据抖动时间的两倍。
  4. 根据权利要求1所述的方法，其中，所述方法还包括：
    在所述OLT对所述ONU在所述通道上进行测距后，所述OLT在多个通道上为所述ONU分配上行带宽，其中，不同通道上所有上行带宽开始时间不同，所述ONU按照与通道对应的开始时间在多个通道上传输数据。
  5. 根据权利要求4所述的方法，其中，在不同通道上有两个相同的上行时间时，所述ONU按照与所述OLT协商的规则传输数据，其中，协商的规则为按照通道的波长高低顺序传输数据。
  6. 根据权利要求1所述的方法，其中，所述方法还包括：
    所述OLT存储获取到的通道的信息以及所述传输时延的信息。
  7. 根据权利要求1所述的方法，其中，所述方法还包括：
    所述OLT按照预设的通道顺序将数据分配到多个通道中并向ONU传输，其中，所述预设的通道顺序为通道波长的高低顺序。
  8. 根据权利要求1所述的方法，其中，所述OLT对不同波长的通道上的传输时延进行调整包括：
    所述OLT从测量到的传输时延中选择最大传输时延；
    所述OLT将最大传输时延减去其他通道的传输时延值后除以2，得到所述其他通道上下行需要增加的额外传输时延值；
    所述OLT将所述其他通道的传输时延加上所述额外传输时延值使得所有通道上下行数据传输时延值相同。
  9. 一种数据的传输方法，包括：
    光网络单元ONU接收光线路终端OLT在调整后的传输时延的通道上发送的数据；
    其中，调整后的传输时延使得所述OLT所有通道上发送的数据到达所述ONU所需的时间相等。
  10. 根据权利要求9所述的方法，其中，光网络单元ONU接收光线路终端OLT在调整后的传输时延的通道上发送的数据包括：
    所述ONU按照接收到的每个数据的第一比特的接收时间的顺序对多个通道的数据进行组包；或，
    所述ONU按照预设的波长通道顺序对数据进行组包，其中，所述预设的通道顺序为通道波长的高低顺序。
  11. 一种数据的传输装置，应用于光线路终端OLT侧，包括：
    获取模块，设置为获取光网络单元ONU所支持的所有波长的通道；
    测距模块，设置为对所述ONU在所述通道上进行测距得到所述ONU在不同波长的通道上的传输时延；
    第一传输模块，设置为对不同波长的通道上的传输时延进行调整，并在调整后的传输时延的通道上传输数据；
    其中，调整后的传输时延使得所述OLT所有通道上传输的数据到达所述ONU所需的时间相等。
  12. 根据权利要求11述的装置，其中，所述装置还包括：
    设置模块，设置为在所述OLT在多个通道上向ONU同时传输数据之前，将向每两个时间顺序间隔通道传输数据的开始传输时间的差值设置为大于预定值；
    第二传输模块，设置为按照所述开始传输时间将数据分别传输到多个通道上。
  13. 根据权利要求12所述的装置，其中，所述预定值为下行数据抖动时间的两倍。
  14. 根据权利要求11所述的装置，其中，所述装置还包括：
    分配模块，设置为在所述测距模块对所述ONU在所述通道上进行测距后，在多个通道上为所述ONU分配上行带宽，其中，不同通道上所有上行带宽开始时间不同；所述ONU按照与通道对应的开始时间在多个通道上传输数据。
  15. 根据权利要求14所述的装置，其中，在不同通道上有两个相同的上行时间时，所述ONU按照与所述OLT协商的规则传输数据，其中，协商的规则为按照通道的波长高低顺序传输数据。
  16. 根据权利要求11所述的装置，其中，所述装置还包括：
    存储模块，设置为存储获取到的通道的信息以及所述传输时延的信息。
  17. 根据权利要求11所述的装置，其中，所述装置还包括：
    第三传输模块，设置为按照预设的通道顺序将数据分配到多个通道中并向ONU传输，其中，所述预设的通道顺序为通道波长的高低顺序。
  18. 根据权利要求11所述的装置，其中，所述调整模块包括：
    选择单元，设置为从测量到的传输时延中选择最大传输时延；
    处理单元，设置为将最大传输时延减去其他通道的传输时延值后除以2，得到所述其他通道上下行需要增加的额外传输时延值；
    计算单元，设置为将所述其他通道的传输时延加上所述额外传输时延值使得所有通道上下行数据传输时延值相同。
  19. 一种数据的传输装置，应用于光网络单元ONU测，包括：
    处理模块，设置为接收光线路终端OLT在调整后的传输时延的通道上传输的数据；
    其中，调整后的传输时延使得所述OLT所有通道上发送的数据到达所述ONU所需的时间相等。
  20. 根据权利要求19所述的装置，其中，所述处理模块包括：
    第一处理单元，设置为按照接收到的每个数据的第一比特的接收时间的顺序对多个通道的数据进行接收并组包；或，
    第二处理单元，设置为预设的波长通道顺序对数据进行组包，其中，所述预设的通道顺序为通道波长的高低顺序。
  21. 一种数据的传输系统，包括权利要求11至权利要求18任一项的装置和权利要求19至权利要求20任一项的装置。
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