WO2017177549A1

WO2017177549A1 - Passive optical network architecture, method for passive optical network architecture to implement data transmission, and optical network device

Info

Publication number: WO2017177549A1
Application number: PCT/CN2016/086906
Authority: WO
Inventors: 张伟良; 李明生; 袁立权
Original assignee: 中兴通讯股份有限公司
Priority date: 2016-04-14
Filing date: 2016-06-23
Publication date: 2017-10-19
Also published as: CN107302397A; CN107302397B

Abstract

Disclosed are a passive optical network architecture, a method for the passive optical network architecture to implement data transmission, and an optical network device. The architecture comprises an optical line terminal (OLT) supporting a plurality of channels, and one or more optical network units (ONUs) supporting one or more channels and located under a same optical distribution network (ODN). The OLT/ONUs are arranged to obtain the number of channels supporting data transmission and/or the corresponding channels and a sending state of the supporting channels, and allocating data to be transmitted to one or more of the supporting channels for transmission, the data being preferentially transmitted on the channel having the earliest sending start time, and a send end time on the channel transmitting the data being close to or ending at a sending end time. The ONUs/OLT are arranged to receive data on channels supported by themselves, and correspondingly reassemble the data according to a send rule. The present invention allows an OLT supporting a plurality of wavelengths to control ONUs supporting different wavelength numbers and wavelengths, implements flexible channel binding, and makes full use of bandwidth.

Description

Passive optical network architecture and method for implementing data transmission thereof and optical network device

Technical field

The embodiments of the present invention relate to, but are not limited to, optical communication technologies, and in particular, a passive optical network (PON) architecture, a method for implementing data transmission, and an optical network device.

Background technique

With the rapid development of broadband services, users' demand for access network bandwidth has increased significantly. Passive Optical Network (PON) is an important technical means for user access, as shown in Figure 1. In the PON system, the optical line terminal (OLT) is connected to the optical splitter through the backbone optical fiber, and the optical splitter passes through the branch optical fiber and multiple user-side optical network units (ONU, Optical Network). Unit), the OLT and the ONU communicate through a pair of wavelengths.

At present, the OLT can use a multi-wavelength optical module to configure four or more uplink and downlink wavelengths. For a scenario where the OLT supports multiple wavelengths, as shown in FIG. 2, in the downlink direction, a plurality of different wavelengths λ _d0 , λ _d1 ... λ _dn After being merged at the central office, it is transmitted to an Optical Wavelength Distribution Network (OWDN) and distributed to each ONU according to different wavelengths. In the uplink direction, different user ONUs emit different optical wavelengths λ _u0 , λ _u1 ... λ _un After the OWDN is merged, it is transmitted to the OLT. In this way, the uplink and downlink transmission of the optical signal is completed. Among them, the downstream wavelengths λ _di (i=0, 1, . . . n) and the upstream wavelengths λ _ui (i=0, 1, . . . , n) can operate in the same band or in different bands.

As shown in FIG. 2, in order to adapt to an OLT supporting multiple wavelengths, the user side needs to deploy a corresponding number of ONUs supporting a single wavelength to respectively correspond to each wavelength. With the development of networks and services, ONUs need to support larger throughput and bandwidth. The number of wavelengths supported by ONUs has gradually evolved from one to more than one. How to support ONUs with different wavelengths under the same ODN and how to implement them Upgrade evolution, there is no relevant technical solution.

Summary of the invention

The following is an overview of the topics detailed in this document. This Summary is not intended to limit the scope of the claims.

The present invention provides a passive optical network architecture, a method for implementing data transmission, and an optical network device, which can implement control of an ONU supporting a multi-wavelength OLT to achieve rate adaptation.

In one aspect, an embodiment of the present invention provides a passive optical network PON architecture, including: an optical line terminal OLT supporting multiple channels, and one or the same optical channel network ODN supporting one or more channels. More than one optical network unit ONU; wherein

The OLT/ONU is set to obtain the number of channels supported by the transmission data and/or the corresponding channel, and the data to be transmitted is evenly distributed and transmitted on the corresponding channel, and the preset data is transmitted or not transmitted on other channels at the same time. ;

The ONU/OLT is configured to receive data on its own supported channel and reassemble the received data according to the transmission rules as needed.

Optionally, the OLT is configured to: acquire a destination ONU that needs to transmit data, and a number of channels supported by the destination ONU;

For each destination ONU, the data to be transmitted is equally divided into j shares, and each data is separately allocated to each channel supported by the destination ONU, and the corresponding time transmission on the remaining (ij) channels is preset. Data or not transmitting data;

Where i is the number of channels supported by the OLT, i is a positive integer greater than or equal to 1; j is the number of channels supported by the ONU, j is a positive integer greater than or equal to 1 and j is less than or equal to i.

Optionally, the OLT is further configured to: encapsulate the data to be sent or data fragments on each channel into data frames and transmit the data to the target ONU.

Optionally, the pre-set data is idle idle data, and/or repetition of the data to be transmitted, and/or other preset data.

Optionally, the destination ONU is configured to: the target ONU supporting the j wavelength receives the data frame on the channel 0 to the channel (j-1).

Optionally, the destination ONU is further configured to: receive data and/or data fragments according to channel information and/or address information in the data frame and local channel information and/or address information, and receive the data. Fragmentation for data reorganization.

Optionally, the OLT is further configured to allocate an uplink bandwidth to the ONU: for the target ONU supporting the j channel, the same bandwidth is allocated on the channel 0 to the channel (j-1), and the channel j and the channel (j+1) are respectively allocated. ... The bandwidth of the corresponding location of the channel (i-1) is not allocated;

Optionally, the ONU is further configured to: obtain an uplink bandwidth allocated by the OLT on each channel, uniformly distribute data in each uplink bandwidth, and not transmit data on other wavelengths that do not obtain bandwidth allocation.

Optionally, the OLT is further configured to: receive a data frame on a channel supported by itself, receive data according to channel information and/or address information in the data frame, and local channel information and/or address information, and/or Data fragmentation, and data reassembly of the received data fragments sent by the same ONU in the same time slot;

And/or receiving data frames on the channel supported by the ONU, and performing data reassembly on the received data fragments sent by the same ONU in the same time slot according to the bandwidth allocated by the ONU.

On the other hand, an embodiment of the present invention further provides a method for implementing data transmission in a PON architecture, including:

The OLT/ONU obtains the number of channels supported by the transmission data and/or the corresponding channel, and uniformly distributes the data to be transmitted on the corresponding channel, and transmits the preset data or does not transmit the data on other channel waves at the same time;

The OLT supports multiple channels; the ONU supports one or more channels and is located under the same ODN.

Optionally, the OLT acquires the number of channels and/or corresponding channels supported by the transmission data, and uniformly distributes the data to be transmitted on the corresponding channel, including:

Obtain the destination ONU of the data to be transmitted and the number of channels supported by the destination ONU;

Optionally, the method further includes: the OLT dividing data to be sent or data on each channel The chip is encapsulated into a data frame and transmitted to the destination ONU.

Optionally, the sizes of the to-be-sent data corresponding to the same location in the j channels are the same.

Optionally, the size of the sent data of each of the j channels is the same, and the XGEM frame or the medium access control MAC frame size of the new generation PON encapsulation method is the same;

The physical layer frame PHY Frame size of the data frame completed on the j channels is the same.

Optionally, when the framing sub-layer FS of the data frame is framing, insert the same number of physical layer OAM PLOAM message numbers and transmission bandwidth mapping BWmap entries; or

PLOAM messages and BWmap entries sent to all ONUs are copied on all channels; or,

The PLOAM message and BWmap sent to the ONU supporting the j channel are transmitted only on channel 0, channel 1, channel 2, ... wavelength j.

Optionally, the method further includes:

When the OLT allocates an uplink bandwidth to the ONU, the same bandwidth, channel j, channel (j+1), and channel (i) are allocated to the ONUs supporting the j channel on the channel 0 to the channel (j-1). -1) The bandwidth of the corresponding location is not allocated;

Optionally, the method further includes:

Receiving, by the OLT, a data frame on a channel supported by itself, receiving data and/or data fragments according to channel information and/or address information and local channel information and/or address information in the data frame, and receiving the data and/or data Data fragmentation sent by the same ONU in the same time slot for data recombination;

In another aspect, the embodiment of the present invention further provides a method for implementing data transmission in a PON architecture, including: an ONU supporting a j channel receiving a data frame on a channel 0 to a channel (j-1);

Receiving data and/or data fragments according to channel information and/or address information in the received data frame and local channel information and/or address information of the ONU, and performing data recombination on the received data fragments;

Where j is the number of channels supported by the ONU, j is a positive integer greater than or equal to 1, and j is less than or equal to i, where i is the number of channels supported by the OLT.

Optionally, the method further includes:

The ONU acquires an uplink bandwidth allocated by the OLT on each channel;

The data is evenly distributed and transmitted within each uplink bandwidth, and no data is transmitted at other wavelengths where bandwidth allocation is not obtained;

The allocation of the uplink bandwidth includes: for the target ONU supporting the j channel, the same bandwidth is allocated on the channel 0 to the channel (j-1), and the channel j, the channel (j+1), and the channel (i-1) are respectively corresponding. The bandwidth of the location is not allocated.

In another aspect, the embodiment of the present invention further provides an optical network device, including a first acquiring module and a first processing module;

a first obtaining module, configured to obtain a number of channels supported by the transmission data and/or a corresponding channel;

The first processing module is configured to evenly distribute the data to be transmitted on the corresponding channel for transmission, and transmit preset data or no data on other channel waves at the same time.

Optionally, the first acquiring module is specifically configured to: obtain a destination ONU that needs to transmit data, and a number of channels supported by the destination ONU;

The first processing module is specifically configured to:

Optionally, the first processing module is further configured to: send data or numbers to be sent on each channel The fragment is encapsulated into a data frame and transmitted to the destination ONU.

Optionally, the size of the sent data of each of the j channels is the same, and the XGEM frame or the MAC frame size of the data frame encapsulation is the same;

Optionally, inserting the same number of physical layer OAM PLOAM message numbers and transmission bandwidth mapping BWmap entry numbers when FS framing of the data frame; or

The PLOAM message and BWmap sent to the ONU supporting the j channel are transmitted on channel 0, channel 1, channel 2, ... channel j.

Optionally, the first processing module is further configured to allocate an uplink bandwidth to the ONU, and for the ONUs that support the j channel, respectively allocate the same bandwidth on the channel 0 to the channel (j-1), and the channel j and the channel respectively The bandwidth of the corresponding position of (j+1)... and channel (i-1) is not allocated;

Optionally, the method further includes receiving, configured to receive a data frame on a channel supported by the OLT, and receive data according to channel information and/or address information in the data frame and local channel information and/or address information. And/or data fragmentation, and data reassembly of the received data fragments sent by the same ONU in the same time slot;

And/or receiving data frames on the channel supported by the OLT, and performing data reassembly on the received data fragments sent by the same ONU in the same time slot according to the bandwidth allocated by the ONU.

Optionally, the optical network device is disposed in an OLT or is a separate entity.

In an aspect, an embodiment of the present invention further provides an optical network device, including: a second acquisition mode Block, a second processing module; wherein

a second acquiring module, configured to receive a data frame on channel 0 to channel (j-1);

The second processing module is configured to receive data and/or data fragments according to channel information and/or address information in the received data frame and local channel information and/or address information of the ONU, and perform data fragmentation on the received data. Data reorganization;

Optionally, the second obtaining module is further configured to: obtain an uplink bandwidth allocated by the OLT on each channel;

The second processing module is further configured to: uniformly distribute data in each uplink bandwidth, and not transmit data on other wavelengths that do not obtain bandwidth allocation;

The embodiment of the invention further provides a computer readable storage medium storing computer executable instructions for performing the method for implementing data transmission by any of the PON architectures described above.

Compared with the related art, the PON architecture provided by the present application includes: an optical line terminal OLT supporting multiple channels, and one or more optical network units ONU supporting one or more channels under the same optical distribution network ODN. Wherein, the OLT/ONU obtains the number of channels supported by the transmission data and/or the corresponding channel, uniformly distributes the data to be transmitted on the corresponding channel, and transmits the preset data or not transmits on other channels at the same time. Data; ONU/OLT, receiving data on its own supported channels. The technical solution provided by the embodiment of the present invention implements the control of the ONU supporting the multi-wavelength OLT, and achieves rate adaptation.

Other features and advantages of the embodiments of the invention will be set forth in the description in the description which The objectives and other advantages of the invention may be realized and obtained by means of the structure particularly pointed in the appended claims.

Other aspects will be apparent upon reading and understanding the drawings and detailed description.

BRIEF abstract

The drawings described herein are intended to provide a further understanding of the invention, and are intended to be a part of the invention. In the drawing:

1 is a schematic structural diagram of a PON system in a related art;

2 is a schematic diagram of an uplink and downlink transmission scenario in which the OLT supports multiple wavelengths in the related art;

3 is a schematic diagram of a PON network architecture of a first embodiment of an ONU supporting different wavelengths under the same ODN according to an embodiment of the present invention;

4 is a schematic diagram of a PON network architecture of a second embodiment of an ONU supporting different wavelengths under the same ODN according to an embodiment of the present invention;

5 is a schematic diagram of a PON network architecture of a third embodiment of an ONU supporting different wavelengths under the same ODN according to an embodiment of the present invention;

FIG. 6 is a schematic diagram of uniformly distributing data according to the number of wavelengths according to an embodiment of the present invention; FIG.

7 is a schematic diagram of a first embodiment of ITU-T data downlink transmission based on a PON architecture according to an embodiment of the present invention;

8 is a schematic diagram of a first embodiment of IEEE data downlink transmission based on a PON architecture according to an embodiment of the present invention;

9 is a schematic diagram of a second embodiment of ITU-T data downlink transmission based on a PON architecture according to an embodiment of the present invention;

10 is a schematic diagram of a second embodiment of IEEE data downlink transmission based on a PON architecture according to an embodiment of the present invention;

11 is a schematic diagram of a third embodiment of ITU-T data downlink transmission based on a PON architecture according to an embodiment of the present invention;

12 is a schematic diagram of a third embodiment of IEEE data downlink transmission based on a PON architecture according to an embodiment of the present invention;

FIG. 13 is a schematic diagram of an embodiment of data uplink transmission in a PON architecture according to an embodiment of the present invention; FIG.

FIG. 14 is a schematic structural diagram of a first embodiment of an optical network device according to an embodiment of the present invention;

FIG. 15 is a schematic structural diagram of a second embodiment of an optical network device according to an embodiment of the present invention.

Preferred embodiment of the invention

The embodiments of the present invention will be described in detail below with reference to the accompanying drawings. It should be noted that, in the case of no conflict, the features in the embodiments and the embodiments in the present application may be arbitrarily combined with each other.

The Next Generation Ethernet Passive Optical Network (NGEPON) is under discussion in standardization. One technology is to achieve 25 Gigabits per second (Gbps) (single 25G) at a single wavelength rate, and can follow single wavelength, 2 wavelength, 3 wavelength. Step-by-step deployment of 4 wavelengths, that is, support for 1 wavelength (the number of channels is 1), 2 wavelengths (the number of channels is 2), 3 wavelengths (the number of channels is 3), 4 wavelengths (the number of channels is 4), etc. The ONUs coexist and are compatible under the same Optical Distribution Network (ODN). It should be noted that the rate of each wavelength here is the same and both are 25G, but in practical applications, there may be cases where the rate of each wavelength is not completely the same, for example, the rate of each wavelength may be different from 25G. The uplink and downlink rates of each wavelength may also be different. In this case, the method of the present invention can still be employed. When the rate of each channel is completely the same, the data to be transmitted is completely evenly distributed on each transmission channel, and when the rate of each channel is not completely the same, the data to be transmitted is evenly distributed on each transmission channel according to the rate ratio of each channel. The following are several implementations proposed by the present invention:

FIG. 3 is a schematic diagram of a network architecture of a first embodiment of an ONU supporting different wavelengths under the same ODN according to an embodiment of the present invention. As shown in FIG. 3, the OLT is implemented at a single wavelength rate of 25 Gbps, and all ONUs are implemented at a single wavelength rate. 25Gbps, in this mode, all ONUs only support a single wavelength, the OLT also supports a single wavelength, and the wavelength is fixed at λ ₀ . At this time, the number of channels supported by ONU1, ONU2, ... ONUn is 1.

FIG. 4 is a schematic diagram of a network architecture of a second embodiment of an ONU supporting different wavelengths under the same ODN according to an embodiment of the present invention. As shown in FIG. 4, the OLT is 50 Gbps at a wavelength of 2, and ONU1 and ONU2 are implemented at a single wavelength rate. At 25 Gbps, ONU3 achieves 50 Gbps at 2 wavelengths. In this mode, the OLT supports 2 wavelengths, and ONUs supporting 2 wavelengths coexist with ONUs supporting single wavelengths. Among them, the wavelength of the single-wavelength ONU is fixed to λ ₀ , and the wavelength of the 2-wavelength ONU is fixed to λ ₀ and λ ₁ . At this time, the number of channels supported by ONU1 and ONU2 is 1, and the wavelength is fixed to λ ₀ ; the number of channels supported by ONU3 is 2, and the wavelengths are fixed to λ ₀ and λ _{1 respectively} .

FIG. 5 is a schematic diagram of a network architecture of a third embodiment for supporting ONUs of different wavelengths under the same ODN according to an embodiment of the present invention. As shown in FIG. 5, the OLT is 100 Gbps at a wavelength of 4 Gbps, and the ONU 1 is 25 Gbps at a single wavelength rate. ONU2 achieves 50 Gbps for 2 wavelengths and 100 Gbps for 4 wavelengths. In this mode, the OLT supports 4 wavelengths, supports 4 wavelength ONUs, supports single wavelength ONUs, and supports 2 wavelength ONUs. The wavelength of the single-wavelength ONU is fixed to λ ₀ , the wavelengths of the two-wavelength ONU are fixed to λ ₀ and λ ₁ , respectively, and the wavelengths of the four-wavelength ONU are fixed to λ ₀ , λ ₁ , λ _{2 ,} and λ _{3 , respectively} . At this time, the number of channels supported by ONU1 is 1 and the wavelength is fixed to λ ₀ ; the number of channels supported by ONU2 is 2 and the wavelengths are fixed to λ ₀ and λ ₁ respectively; the number of channels supported by ONU3 is 4 and the wavelengths are fixed to λ ₀ , λ ₁ , λ ₂ and λ ₃ .

It should be noted that, in FIG. 3 to FIG. 5, only three ONUs coexisting under the same ODN are taken as an example, but are not intended to limit the scope of protection of the present invention, and are merely illustrative.

That is, the PON architecture of the embodiment of the present invention includes at least: an OLT supporting multiple channels, and one or more ONUs under the same ODN supporting one or more channels, where

The ONU/OLT is configured to receive data on the channel waves supported by itself, and reassemble the received data according to the transmission rules as needed.

It should be noted that the number of channels in the PON architecture of the present invention may be equal to the number of wavelengths, or may be equal to the number of optical fibers, or may be the number of wavelengths included in multiple optical fibers.

For the down direction:

The OLT is configured to acquire the number of channels supported by the destination ONU and the destination ONU and/or the corresponding channel; the data to be transmitted is evenly distributed in the corresponding channel according to the number of channels of the obtained ONU and the number of channels supported by the host. Up-transmission, transmitting pre-set data or not transmitting data on other channels at the same time. Here, the corresponding channel refers to a channel supported by both the OLT and the destination ONU, and the other channels refer to channels other than the corresponding channel in the channel supported by the OLT.

The destination ONU is set to receive data on its own supported channel and send it as needed. The rules reassemble the received data accordingly.

among them,

The OLT is specifically configured to: obtain the destination ONU of the data to be transmitted and the number of channels supported by the destination ONU; for each destination ONU, divide the data to be transmitted into j shares equally, and assign each data to the destination ONU separately. Supported on each channel, the remaining (ij) channels corresponding to the transmission of pre-set data or no data; where i is the number of channels supported by the OLT, i is a positive integer greater than or equal to 1; j is The number of channels supported by the ONU, j is a positive integer greater than or equal to 1 and j is less than or equal to i.

Further, the OLT is further configured to: encapsulate the data to be sent or the data fragment on each channel into a data frame and transmit the data to the target ONU.

Correspondingly, the destination ONU is specifically configured to: the destination ONU supporting the j wavelength receives the data frame on the channel 0 to the channel (j-1).

The destination ONU is further configured to: receive data and/or data fragments according to channel information and/or address information in the data frame and local channel information and/or address information, and perform data reassembly on the received data fragments.

Wherein, the preset data is idle idle data, and/or repetition of data to be transmitted, and/or other preset data.

For the upstream direction:

The OLT is also configured to allocate an upstream bandwidth for the ONU: for the destination ONU supporting the j channel, the same bandwidth is allocated on channel 0 to channel (j-1), channel j, channel (j+1), and channel (i- 1) The bandwidth of the corresponding location is not allocated.

In this way, the destination ONU is further configured to: obtain the uplink bandwidth allocated by the OLT on each channel, uniformly distribute the data in each uplink bandwidth, and not transmit data on other wavelengths that do not obtain bandwidth allocation.

The OLT is further configured to receive a data frame on its own supported channel, receive data and/or data fragments according to channel information and/or address information and local channel information and/or address information in the data frame, and receive the data. Data shards sent by the same ONU in the same time slot for data recombination;

And/or receiving data frames on their own supported channels, according to the bandwidth allocated to the ONUs themselves, Data reassembly is performed on the received data fragments transmitted by the same ONU in the same time slot.

For convenience, the following description is made by taking the number of channels equal to the number of wavelengths as an example, but is not intended to limit the scope of protection of the present invention.

The method for implementing data transmission based on the PON architecture of the embodiment of the present invention includes:

For the OLT side, before the data to be transmitted enters the queue (Queue),

First, the destination ONU to which the data is sent, and the number of wavelengths supported by the destination ONU; where the data transmission request submitted by the service layer carries the data to be transmitted, the wavelength information to be transmitted by the data, and/or the destination ONU information, etc. The OLT can extract the number of wavelengths to the destination ONU and its support according to the data transmission request. It should be noted that the data transmission generally has queue management. The queue management can be an actual module or a virtual module. For example, combined with other modules, the data will be put into the queue first, and then sent. The data is sent from the queue for transmission.

Then, according to the obtained number of wavelengths of the destination ONU, the data to be transmitted is evenly distributed and transmitted on the corresponding wavelength.

The data to be transmitted is evenly distributed on the corresponding wavelength according to the obtained number of wavelengths of the obtained ONU, and specifically includes:

Assuming that the OLT supports i wavelengths, the ONU supports j wavelengths, where i is a positive integer greater than or equal to 1, j is a positive integer greater than or equal to 1 and j is less than or equal to i. Then, for each ONU, the data to be transmitted is equally divided into j shares, each of which is allocated to each wavelength supported by the ONU, and for the remaining (ij) wavelengths, the preset data is transmitted. Or do not transfer data.

In this way, the ONU can encapsulate the data to be transmitted or the data fragment corresponding to each wavelength into a data frame and transmit it to the destination ONU.

The pre-set data may be idle data, and/or repetition of data to be transmitted, and/or other preset data such as other data sent to the destination ONU, or data sent to other ONUs, etc. Wait.

In the uplink direction, since the bandwidth allocated by the OLT to the ONU has determined which wavelengths the ONU transmits data, it is not necessary to transmit the preset data at other wavelengths, that is, directly transmit data.

among them,

Distributing each piece of data to the wavelength corresponding to each wavelength supported by the ONU for uniform transmission includes: placing each piece of data into a queue and evenly distributing the transmissions at each wavelength supported by the ONU.

The following describes the data transmission of the PON architecture of the present invention with reference to FIG. 5 as follows. As shown in FIG. 5, it is assumed that the OLT supports 4 wavelengths, the ONU1 supports a single wavelength, the ONU2 supports 2 wavelengths, and the ONU3 supports 4 wavelengths.

FIG. 6 is a schematic diagram of an embodiment of uniformly distributing data according to the number of wavelengths according to an embodiment of the present invention. Referring to FIG. 5, for an ONU having a wavelength of 1, that is, an ONU, such as ONU1, the entire data to be transmitted is put into queue 0 (queue0); And put the same size of idle data in the other three queues, queue1, queue2, and queue3;

For an ONU with a wavelength of 2, such as ONU2, the data to be transmitted is evenly divided into two equal parts, which are respectively placed into queue0 and queue1. For example, odd bytes can be placed in queue0, even numbers can be placed in queue1, and in queue2. And queue3 respectively put id data of 1/2 data size;

For an ONU with a wavelength of 4, such as ONU3, the data to be transmitted is evenly divided into 4 shares, which are respectively placed into queue0, queue1, queue2, and queue3. For example, the first byte is placed in queue0 and the second byte is placed in queue1. The third byte is placed in queue2, the fourth byte is placed in queue3, then the fifth byte is placed in queue0, the sixth byte is placed in queue1, the seventh byte is placed in queue2, and the eighth byte is placed in queue3. ,So on and so forth.

7 is a schematic diagram of a first embodiment of ITU-T data downlink transmission based on a PON architecture according to an embodiment of the present invention, and FIG. 8 is a schematic diagram of a first embodiment of IEEE data downlink transmission based on a PON architecture according to an embodiment of the present invention. The architecture shown in Figure 5, for example, if the ONU supports a single wavelength, as shown in Figure 7 and Figure 8, the data1 to be transmitted is transmitted when the ONU supports a single wavelength. The entire data1 (abbreviated as 1 in the drawing) is placed. In queue ₀ and on the corresponding wavelength λ ₀ , other queues, ie queue1, queue2 and queue3, are placed in the same size of idle data; for example, if the ONU supports 2 wavelengths, as shown in Figure 7 and Figure 8. The data 2 to be transmitted (abbreviated as 2 in the drawing) is the transmission in the case where the ONU supports 2 wavelengths, and the data 2 is equally divided into data 2-1 (abbreviated as 2-1 in the drawing) and data 2-2 (Fig. The middle is abbreviated as 2-2), where data2-1 is placed in queue0 and transmitted on the corresponding wavelength λ ₀ , data2-2 is placed in queue1 and transmitted on the corresponding wavelength λ ₁ , while other queues are queue2 and queue3. Put the same size of idle data in the same position; another example: if the ONU supports 4 waves As shown in FIG. 7 and FIG. 8, the data3 to be transmitted is the transmission when the ONU supports 4 wavelengths, and the data3 (abbreviated as 3 in the drawing) is equally divided into data3-1 (abbreviated as 3- in the drawing) 1), data3-2 (abbreviated as 3-2 in the drawing), data3-3 (abbreviated as 3-3 in the drawing), and data3-4 (abbreviated as 3-4 in the drawing), where data3-1 Placed in queue ₀ and transmitted on the corresponding wavelength λ ₀ , data3-2 is placed in queue ₁ and transmitted on the corresponding wavelength λ ₁ , data 3-3 is placed in queue ₂ and transmitted on the corresponding wavelength λ ₂ , and data 3-4 is placed Queue3 is transmitted on the corresponding wavelength λ ₃ .

In another embodiment, the number of idles in the first embodiment may be replaced with data to be sent, that is, data to be transmitted may be repeatedly transmitted on an unsupported wavelength. Specifically, in combination with FIG. 5, for an ONU having a wavelength of 1, such as ONU1, the data to be transmitted is entirely placed in queue 0, and the data to be transmitted is also placed in the other three queues, namely queue1, queue2, and queue3;

For an ONU with a wavelength of 2, such as ONU2, the data to be transmitted is evenly divided into two equal parts, which are respectively placed into queue0 and queue1. For example, odd bytes can be placed in queue0, even numbers can be placed in queue1; The average of the transferred data is divided into two parts and placed into queue2 and queue3 respectively;

For an ONU with a wavelength of 4, such as ONU3, the data to be transmitted is evenly divided into 4 points, which are respectively placed into queue0, queue1, queue2, and queue3. For example, the first byte is placed in queue0 and the second byte is placed in queue1. The third byte is placed in queue2, the fourth byte is placed in queue3, then the fifth byte is placed in queue0, the sixth byte is placed in queue1, the seventh byte is placed in queue2, and the eighth byte is placed in queue3. ,So on and so forth.

9 is a schematic diagram of a second embodiment of ITU-T data downlink transmission based on a PON architecture according to an embodiment of the present invention, and FIG. 10 is a schematic diagram of a second embodiment of IEEE data downlink transmission based on a PON architecture according to an embodiment of the present invention. The architecture shown in Figure 5, for example, if the ONU supports a single wavelength, as shown in Figure 9 and Figure 10, the data1 to be transmitted is transmitted when the ONU supports a single wavelength, and the entire data1 (abbreviated as 1 in the drawing) is placed. In queue ₀ and on the corresponding wavelength λ ₀ , the other queues, ie queue1, queue2 and queue3, are placed in the same size of the entire data1; for example, if the ONU supports 2 wavelengths, as shown in Figure 9 and Figure 10. The data 2 to be transmitted (abbreviated as 2 in the drawing) is the transmission in the case where the ONU supports 2 wavelengths, and the data 2 is equally divided into data 2-1 (abbreviated as 2-1 in the drawing) and data 2-2 (Fig. The middle is abbreviated as 2-2), where data2-1 is placed in queue0 and transmitted on the corresponding wavelength λ ₀ , data2-2 is placed in queue1 and transmitted on the corresponding wavelength λ ₁ , while other queues are queue2 and queue3. Put data2-1 and data2-2 again in the same position; another example: if the ONU branch 4 wavelengths, as shown in Fig. 9 and Fig. 10, the data3 to be transmitted is the transmission when the ONU supports 4 wavelengths, and the data3 (abbreviated as 3 in the drawing) is equally divided into data3-1 (the abbreviated in the drawing is 3-1), data3-2 (abbreviated as 3-2 in the drawing), data3-3 (abbreviated as 3-3 in the drawing), and data3-4 (abbreviated as 3-4 in the drawing), where data3 -1 is placed in queue ₀ and transmitted on the corresponding wavelength λ ₀ , data3-2 is placed in queue ₁ and transmitted on the corresponding wavelength λ ₁ , and data 3-3 is placed in queue ₂ and transmitted on the corresponding wavelength λ ₂ , data 3-4 Placed in queue3 and transmitted on the corresponding wavelength λ ₃ .

In the third embodiment, the number of idles in the first embodiment may be replaced with other pre-set data, that is, data set in advance, such as data received by other ONUs, may be transmitted on a wavelength that is not supported by the target ONU. Specifically, in combination with FIG. 5, for an ONU having a wavelength of 1, such as ONU1, the data to be transmitted is entirely put into queue 0; and, the preset data1' may be entirely placed in queue1, where data1' is sent to the target. The data of other ONUs other than ONU, and the other two queues, namely queue2 and queue3, are placed with idle data;

11 is a schematic diagram of a third embodiment of ITU-T data downlink transmission based on a PON architecture according to an embodiment of the present invention, and FIG. 12 is a schematic diagram of a third embodiment of IEEE data downlink transmission based on a PON architecture according to an embodiment of the present invention. The architecture shown in Figure 5, for example, if the ONU supports a single wavelength, as shown in Figure 11 and Figure 12, the data1 to be transmitted is transmitted when the ONU supports a single wavelength. The entire data1 (abbreviated as 1 in the drawing) is placed. In queue ₀ and transmitted on the corresponding wavelength λ ₀ , the same size of data1 ' is placed in the same position of queue1 and transmitted on the corresponding wavelength λ ₁ , where data1 ' is sent to other than the target ONU ONU data, while other queues, ie queue2 and queue3, have the same size of idle data; if: ONU supports 2 wavelengths, as shown in Figure 11 and Figure 12, data2 needs to be transmitted (abbreviated in the drawing) 2) is the transmission in the case where the ONU supports 2 wavelengths, and data2 is equally divided into data2-1 (abbreviated as 2-1 in the drawing) and data2-2 (abbreviated as 2-2 in the drawing), wherein Data2-1 is placed in queue0 and transmitted on the corresponding wavelength λ ₀ , data2 -2 is placed in queue1 and transmitted on the corresponding wavelength λ ₁ , while other queues, ie queue2 and queue3, are placed with the same size of idle data; for example, if the ONU supports 4 wavelengths, as shown in Figure 11 and Figure 12 It is shown that the data3 to be transmitted is the transmission when the ONU supports 4 wavelengths, and the data3 (abbreviated as 3 in the drawing) is equally divided into data3-1 (abbreviated as 3-1 in the drawing) and data3-2 (attached) The figure is abbreviated as 3-2), data3-3 (abbreviated as 3-3 in the drawing) and data3-4 (abbreviated as 3-4 in the drawing), where data3-1 is placed in queue0 and at the corresponding wavelength. λ ₀ is transmitted, data3-2 is placed in queue1 and transmitted on the corresponding wavelength λ ₁ , data3-3 is placed in queue ₂ and transmitted on the corresponding wavelength λ ₂ , and data 3-4 is placed in queue ₃ and at the corresponding wavelength λ ₃ Transfer on.

It should be noted that, in FIG. 12, when the idle key is sent, there may be no frame header (H, Header) between several idles, but it is embodied as a continuous idle.

The next-generation passive optical network (NG-PON2) is an important branch in the evolution of PON technology. In NG-PON2, as shown in the related protocol, the encapsulation process of data transmission generally includes: data is first encapsulated into a new generation PON encapsulation method ( XGEM (XG-PON Encapsulation Method) frame, the XGEM frame includes the overhead and the payload, and the XGEM port identifier (Port ID) is carried in the overhead; the multiple XGEM frames are encapsulated into the super frame, and the superframe includes the overhead and the payload, and the overhead includes The physical layer OAM (PLOAM, Physical Layer OAM) message, the transmission bandwidth mapping (BWmap) bandwidth allocation, etc.; the super frame is processed by FEC and then encapsulated into a physical layer frame (PHY Frame), and the physical frame includes a frame header and a payload. The frame header is used by the receiver to detect the starting position of the physical frame. In addition, EPON/10GEPON is another important branch of PON evolution. As shown in the related protocol, the encapsulation process of data transmission generally includes: data is first encapsulated into a medium access control (MAC) frame, and the MAC frame includes overhead and payload. Multiple MAC frames are then encapsulated into physical frames, which include overhead and payload headers and payloads.

In the present invention, the sizes of the to-be-sent data corresponding to the same position in the j wavelengths are the same.

In the present invention, the size of the transmission data extracted every time for the j wavelengths is the same, and the XGEM frame or the MAC frame size of the package is also the same.

In the present invention, the size of the physical layer frame (PHY Frame) completed in the j wavelengths is the same, and in order to ensure that the data transmitted on each wavelength is good, further includes:

For NG-PON2, when framing a sub-layer (FS, Framing Sublayer) framing, insert the same number of physical layer OAM (PLOAM, Physical Layer OAM) message numbers and transfer bandwidth map (BWmap) entries; or

PLOAM messages and BWmap entries sent to all ONUs are copied at all wavelengths, ie PLOAM messages and BWmap entries on each wavelength include PLOAM messages and BWmap entries for all wavelengths; or

The PLOAM message and BWmap sent to the ONU supporting the j-wavelength are transmitted only on λ ₀ , λ ₁ , λ ₂ ... λ _j .

As shown in the schematic diagram of the ITU-T downlink data transmission shown in FIG. 7, FIG. 9 and FIG. 11, the size of the to-be-sent data corresponding to the same location in the four queues is the same; the size of the sent data of each of the four queues is the same. The encapsulated XGEM frame size is also the same;

The physical layer frames (PHY Frames) that are completed at the four wavelengths are the same size. To ensure that the data transmitted on each wavelength is good, further includes:

Insert the same number of PLOAM messages and BWmap entries when FS framing; or,

PLOAM messages and BWmap entries sent to all ONUs are copied at all wavelengths; or,

The PLOAM message and BWmap sent to the ONU supporting the j-wavelength are transmitted only on λ ₀ , λ ₁ , λ ₂ and λ _j . For example, the PLOAM message and BWmap sent to the ONU supporting 2 wavelengths are only transmitted on λ ₀ and λ ₁ , and the PLOAM message and BWmap sent to the ONU supporting 4 wavelengths are transmitted on λ ₀ , λ ₁ , λ ₂ and λ ₃ . .

Further, the downlink data sent by the OLT to the ONU may be discontinuous, and the data is sent in a burst manner, such as in an IEEE Ethernet Passive Optical Network (EPON) system, and the manner of managing information similar to PLOAM/BWmap may be adopted. As implemented and transmitted by the Multi-Point Control Protocol (MPCP) in IEEE EPON, MPCP can be transmitted as data, that is, transmitted uniformly on the wavelengths according to the number of wavelengths. Of course, MPCP can also transmit on the wavelengths supported by each ONU, while transmitting idle data or not transmitting data on other wavelengths. For example, since each ONU can receive on λ ₀ , MPCP can also be fixed at Sending on λ ₀ , transmitting idle data or not transmitting data at positions corresponding to time on λ ₁ , λ _{2 ,} and λ ₃ . In addition, MPCP can also send one copy per wavelength.

Further, it is assumed that the OLT supports the i-wavelength. For the ONU side, the method for implementing data transmission according to the present invention further includes:

The ONU supporting the j wavelength receives the data frame on λ ₀ ～ λ _(j-1) , and receives the data frame according to the received data frame and the local wavelength information and/or address information; correspondingly according to the OLT side transmission mode The received data frame is decapsulated, and data is reorganized for data fragmentation. At this time, if an idle frame is received at some wavelengths, and/or the data frame is repeated, it may be directly discarded.

It is assumed that the OLT supports i wavelengths. If the ONU needs to send uplink data, the method for implementing data transmission according to the present invention further includes:

When the OLT allocates bandwidth, for the ONU supporting j wavelength, the same bandwidth is allocated on λ ₀ ～ λ _(j-1) , and λ _j , λ _(j+1) ... and λ _{(i-1) are} corresponding positions. Bandwidth is not allocated;

The ONU sends uplink data within the allocated bandwidth.

FIG. 13 is a schematic diagram of an embodiment of data uplink transmission in a PON architecture according to an embodiment of the present invention, which supports a single-wavelength ONU to transmit a data frame to a bandwidth allocated to its own wavelength at a wavelength λ ₀ , corresponding to λ ₁ , λ ₂ , and λ ₃ The location of the time does not send data, and the OLT receives the data frame according to the received data frame and the local wavelength information and/or the address information, and may also receive the data frame according to the bandwidth allocated by the OLT to the ONU;

An ONU supporting 2 wavelengths transmits data frames within its own bandwidth on λ ₀ and λ ₁ , and does not transmit data at positions corresponding to λ ₂ and λ ₃ at the corresponding time. The OLT according to the received data frame and local wavelength information And/or receiving the data frame by the address information, and receiving the data frame according to the bandwidth allocated by the OLT to the ONU; and performing data reassembly on the received data fragment according to the sending manner of the ONU side.

An ONU supporting 4 wavelengths transmits data frames within its own bandwidth on λ ₀ , λ ₁ , λ _{2 ,} and λ ₃ , and the OLT receives data frames according to the received data frames and local wavelength information and/or address information. The data frame may also be received according to the bandwidth allocated by the OLT to the ONU; and the received data fragment is reorganized according to the transmission mode of the ONU side.

Still taking FIG. 5 as an example, for example, for ONU1 supporting single wavelength, bandwidth is allocated on λ ₀ , and bandwidths at corresponding positions of λ ₁ , λ ₂ and λ ₃ are not allocated; correspondingly, ONU is only on λ ₀ The data is transmitted within the allocated bandwidth, and idle data is not required on λ ₁ , λ ₂ and λ ₃ ;

For another example, for ONU2 supporting 2 wavelengths, the same bandwidth is allocated on λ ₀ and λ ₁ , and the bandwidths at corresponding positions of λ ₂ and λ ₃ are not allocated; accordingly, the ONU is allocated only on λ ₀ and λ ₁ Data is transmitted within the bandwidth, and idle data is not required on λ ₂ and λ ₃ ;

Another example: for ONU3 supporting 4 wavelengths, the same bandwidth is allocated on λ ₀ , λ ₁ , λ ₂ and λ ₃ ; correspondingly, ONUs supporting 4 wavelengths are allocated on λ ₀ , λ ₁ , λ ₂ and λ ₃ Send data within the bandwidth.

14 is a schematic structural diagram of a first embodiment of an optical network device according to an embodiment of the present invention. As shown in FIG. 14, the method includes at least a first acquiring module and a first processing module.

among them,

The first acquiring module is specifically configured to: obtain the destination ONU of the data to be transmitted and the number of channels supported by the destination ONU; correspondingly,

The first processing module is specifically configured as:

The first processing module is further configured to: encapsulate the data to be sent or the data fragment on each channel into a data frame and transmit the data to the destination ONU.

Wherein, the preset data may be idle data, and/or data to be transmitted. Repeat, and/or other pre-set data, etc.

among them,

Assigning each copy to each of the wavelengths supported by the ONU includes: placing each piece of data in its respective queue and distributing it separately for each wavelength supported by the ONU.

further,

The size of the data to be transmitted corresponding to the same position in the j channels is the same.

The size of the transmitted data of each j channel is the same, and the size of the encapsulated XGEM frame or MAC frame is also the same.

The PHY Frame size completed on the j channels is the same. In order to ensure that the data transmitted on each wavelength is good, further includes:

Insert the same number of PLOAM messages and the number of transmitted BWmap entries when FS is framing; or,

PLOAM messages and BWmap entries sent to all ONUs are copied on all channels, ie PLOAM messages and BWmap entries on each wavelength include PLOAM messages and BWmap entries for all wavelengths; or,

The PLOAM message and BWmap sent to the ONU supporting the j channel are transmitted on channel 0, channel 1, channel 2... channel j (when the number of channels is equal to the number of wavelengths, here λ ₀ , λ ₁ , λ ₂ and λ _j ).

Further, the first processing module is further configured to: when the uplink bandwidth is allocated for the ONU, for the ONUs supporting the j channel, the same bandwidth is allocated on the channel 0 to the channel (j-1), and the channel j and the channel are respectively The bandwidth of j+1)...and the corresponding position of channel (i-1) is not allocated.

A receiving module is further provided, configured to receive a data frame on a channel supported by the OLT itself, and receive data and/or data according to channel information and/or address information in the data frame and local channel information and/or address information. Fragmentation, and data reassembly of the received data fragments sent by the same ONU in the same time slot;

The optical network device shown in FIG. 14 may be disposed in the OLT or may be an independent entity.

FIG. 15 is a schematic structural diagram of a second embodiment of an optical network device according to an embodiment of the present invention. As shown in FIG. 15, the method includes at least a second acquiring module and a second processing module.

The second obtaining module is further configured to: obtain an uplink bandwidth allocated by the OLT on each channel;

The device described in FIG. 15 may be disposed in the ONU or may be an independent entity;

It should be noted that, in the data processing, data transmission, and data receiving process of the embodiment of the present invention, the size of the data block, the size of the data frame, and the like are only listed as an implementation manner, and those skilled in the art It is to be understood that, in other implementations, the size of the data block, the size of the data frame, and the like may be changed and implemented in other implementations, and is not intended to limit the scope of the present invention.

It will be apparent to those skilled in the art that the various 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. Thus, the invention is not limited to any particular hardware and software. Combine.

The above description is only the preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes can be made to the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and scope of the present invention are intended to be included within the scope of the present invention.

Industrial applicability

The passive optical network architecture and the data transmission method and the optical network device provided by the embodiments of the present invention implement the control of the ONU supporting multiple wavelengths and the ONUs supporting different wavelengths and wavelengths, and realize flexible binding of the channels, and fully Take advantage of bandwidth.

Claims

A PON architecture for a passive optical network, comprising: an optical line terminal OLT supporting multiple channels, and one or more optical network units ONUs supporting one or more channels under the same optical distribution network ODN;

OLT/ONU, set to obtain the number of channels supported by the transmission data and/or the corresponding channel, and the transmittable state of the supported channels, and distribute the data to be transmitted on one or more supported channels for transmission. Priority is transmitted on the channel that can send the earliest start time, and the transmission end time on the channel for transmitting data is close or ended at the end of the transmittable time;

The ONU/OLT is set to receive data on its own supported channel and reassemble the data accordingly according to the sending rules.
The PON architecture according to claim 1, wherein the OLT is configured to: acquire a destination ONU of data to be transmitted, a number of channels supported by the destination ONU, and/or a corresponding channel, and a transmittable state of the supported channel;

According to the obtained number of channels of the ONU and the transmittable state of the channel, the data to be transmitted is allocated on one or more supported channels, and the data is preferentially transmitted on the channel with the earliest start time of transmission, and the data is transmitted. The end of transmission on the channel is close or ends at the end of the transmittable time.
The PON architecture according to claim 2, wherein said data is preferentially transmitted on a channel whose earliest start time is transmittable, and a transmission end time on a channel for transmitting data is close or ended at a transmittable end time includes:

When the destination ONU supports a single channel, the data to be transmitted is sent on the channel from the transmittable start time, and indicates the sequence number and/or length of the data to be transmitted;

When the destination ONU supports two or more channels, if the data to be transmitted is completely transmitted on a channel with the earliest start time of transmission, the data to be transmitted is sent on the channel, and Defining the sequence number and/or length of the data to be transmitted; if the data to be transmitted cannot be completely transmitted on a certain channel, segmenting the data to be transmitted to be distributed and distributed on multiple channels, And indicating the sequence number and fragmentation and/or length of the data to be transmitted on each channel.
The PON architecture of claim 2, the OLT is further configured to: encapsulate the data or data fragments to be sent on the channels into data frames, and then transmit the data to the destination ONU, and carry the following in the data frame. At least one of the contents: data serial number, data fragmentation, and length.
The PON architecture of claim 4 wherein said destination ONU is set to:

When the destination ONU supports a single channel, the data frame is received on the channel, and the corresponding data is parsed;

When the destination ONU supports two channels or more, the data frame is received according to the channel information and/or the address information on the channel supported by the destination, and the data is reorganized according to the sequence number and the fragmentation in the data frame.
The PON architecture according to claim 1, wherein the OLT is further configured to allocate an uplink bandwidth to the ONU on each channel supported by the ONU; wherein, the bandwidth allocated by one ONU supporting multiple channels overlaps.
The PON architecture of claim 6, the ONU is further configured to: acquire an uplink bandwidth allocated by the OLT on a channel supported by the ONU, and a transmittable state of the supported channel, and allocate data to be transmitted in the For transmission on one or more supported channels with upstream bandwidth, the data is preferentially transmitted on the channel with the earliest start time, and the transmission end time on the channel transmitting the data is close or ends at the end of the transmittable time.
The PON architecture according to claim 7, wherein the data is preferentially transmitted on a channel whose transmission start time is the earliest, and the transmission end time on the channel for transmitting data is close or ended at the transmittable end time includes:

When the destination ONU supports a single channel or obtains bandwidth allocation only on one channel, the data to be transmitted is transmitted on the channel from the transmittable start time, and indicates the sequence number of the data to be transmitted. And / or length;

When the destination ONU supports two or more channels and obtains bandwidth allocation in two or more channels, if the data to be transmitted is completely transmitted on a channel with the earliest start time of transmission, the The data to be transmitted is sent on the channel, and indicates the sequence number and/or length of the data to be transmitted; if the data to be transmitted cannot be completely transmitted on a certain channel, the data to be transmitted is performed. Splitting is distributed over multiple channels and refers to The sequence number and fragmentation and/or length of the data to be transmitted on each channel are shown.
The PON architecture of claim 8, the ONU is further configured to: encapsulate the data or data fragments to be sent on the channels into data frames, and then transmit the data to the destination OLT, and carry the following in the data frame. At least one of the contents: data serial number, data fragmentation, and length.
The PON architecture according to claim 8, wherein the OLT is further configured to: receive data on a channel supported by itself, collect data frames sent by the ONU according to the ONU information and/or the bandwidth allocation, and correspondingly according to the data sending rule. Reorganize the received data.
The PON architecture according to any one of claims 1 to 10, wherein the transmission end time on the channel for transmitting data is similar: the transmission end time on the channel of the transmission data is the same; or the data transmission The difference between the transmission end times on the channel is less than the preset time difference threshold.
The architecture according to claim 2 or 7, wherein if there are multiple channels, the transmit start times are the oldest and the same, then the data preferentially transmits data on the channels preferentially.
The architecture according to claim 2 or 7, if the channel increases when the next transmit start time is available, and/or the channel decreases when the transmit end time is available, then the data continues to be sent evenly on the updated channel until The data is sent or all channels arrive at the end of the transmission.
A method for implementing data transmission in a PON architecture, comprising:

The OLT obtains the number of channels supported by the transmission data and/or the corresponding channel, and the transmittable state of the supported channels, and distributes the data to be transmitted on one or more supported channels, and the data is preferentially transmitted. The channel is transmitted on the earliest time of the start time, and the transmission end time on the channel for transmitting data is close or ends at the end of the transmittable time;

The OLT supports multiple channels; the ONU supports one or more channels and is located under the same ODN.
The method according to claim 14, wherein said data is preferentially transmitted on a channel whose transmission start time is the earliest, and a transmission end time on a channel for transmitting data is similar:

Obtain the destination ONU of the data to be transmitted and the number of channels supported by the destination ONU and/or the corresponding channel, and the transmittable status of the supported channels;

When the destination ONU supports a single channel, the data to be transmitted is sent on the channel from the transmittable start time, and indicates the sequence number and/or length of the data to be transmitted;

When the destination ONU supports two channels or more, if the data to be transmitted can be sent on a channel with the earliest start time of transmission, and indicates the sequence number and/or length of the data to be transmitted. If the data to be transmitted cannot be sent on a certain channel, the data to be transmitted is segmented to be distributed on multiple channels, and the sequence number of the data to be transmitted is indicated on each channel. And fragmentation and/or length.
The method according to claim 15, further comprising: the OLT encapsulating data to be transmitted or data fragments on each channel into data frames and transmitting the data to the target ONU, and carrying the following content in the data frame at least One: data serial number, data fragmentation, and length.
The method of claim 14 further comprising:

The OLT allocates uplink bandwidth to the ONU on each channel supported by the ONU, and overlaps bandwidth allocated by one ONU supporting multiple channels; receives data on the channel supported by itself, according to ONU information and/or the bandwidth The data frames sent by the ONU are allocated and collected, and the received data is reorganized according to the data transmission rule.
The method according to claim 15, wherein if there are multiple channels, the transmit start times are the earliest and the same, the method further comprises: the OLT preferentially transmitting the data on the channels preferentially.
The method according to claim 15, wherein if the channel is increased at the next transmittable start time, and/or the channel is decreased at the transmittable end time, the method further comprises:

The OLT continues to transmit the data evenly on the updated channel until the data transmission is complete or all channels arrive at the transmission end time.
The method according to any one of claims 14 to 19, wherein the transmission end time on the channel for transmitting data is similar: the transmission end time on the channel of the transmission data is the same; or the transmission on the channel of the transmission data The difference between the end times is less than the preset time difference threshold.
A method for implementing data transmission in a PON architecture, comprising: when an ONU supports a single channel, receiving a data frame on the channel, and parsing corresponding data;

When the ONU supports two channels or more, the channel information and/or address information is received on the channel supported by the ONU, and the data is reassembled according to the sequence number and the fragmentation in the data frame.
The method of claim 21, further comprising:

The ONU acquires an uplink bandwidth allocated by the OLT on a channel supported by the ONU, and a transmittable state of the supported channel, and allocates data to be transmitted on one or more supported channels having an uplink bandwidth. The data is preferentially transmitted on the channel whose transmission start time is the earliest, and the transmission end time on the channel for transmitting data is close or ends at the transmittable end time.
The method according to claim 21, wherein said data is preferentially transmitted on a channel whose transmission start time is the earliest, and a transmission end time on a channel for transmitting data is close or ended at a transmittable end time includes:

When the destination ONU supports a single channel or obtains bandwidth allocation only on one channel, the data to be transmitted is transmitted on the channel from the transmittable start time, and indicates the sequence number of the data to be transmitted. And / or length;

When the destination ONU supports two or more channels and obtains bandwidth allocation in two or more channels, if the data to be transmitted is completely transmitted on a channel with the earliest start time of transmission, the The data to be transmitted is sent on the channel, and indicates the sequence number and/or length of the data to be transmitted; if the data to be transmitted cannot be completely transmitted on a certain channel, the data to be transmitted is performed. The segmentation is transmitted over a plurality of channels and indicates the sequence number and fragmentation and/or length of the data to be transmitted on each channel.
The method of claim 21, the method further comprising: the ONU encapsulating data to be transmitted or data fragments on the channels into data frames, transmitting the data to the destination OLT, and carrying the following in the data frame At least one of the contents: data serial number, data fragmentation, and length.
The method according to claim 22, if there are multiple channels, the transmit start time is the earliest and the same, the method further comprises: the ONU preferentially transmitting the data on the channels preferentially.
The method of claim 22, if the channel is increased when the next transmittable time is available, and/or the channel is decreased when the transmittable end time is available, the method further comprising:

The ONU continues to transmit the data evenly on the updated channel until the data transmission is completed or all channels arrive at the transmission end time.
An optical network device, comprising a first acquiring module and a first processing module; wherein

The first obtaining module is configured to obtain the number of channels supported by the transmission data and/or corresponding channels, And the transmittable status of the supported channels;

The first processing module is configured to allocate data to be transmitted on one or more supported channels, and the data is preferentially transmitted on the channel with the earliest start time, and the transmission end time on the channel for transmitting data is similar. Or end at the end of the sendable time.
The optical network device according to claim 27, wherein the first obtaining module is configured to: acquire a destination ONU of data to be transmitted, a number of channels supported by the destination ONU, and/or a corresponding channel, and a supported channel. Sendable status;

The first processing module is configured to:

When the destination ONU supports a single channel, the data to be transmitted is sent on the channel and indicates the sequence number and/or length of the data to be transmitted;

When the destination ONU supports two or more channels, if the data to be transmitted can be completely transmitted on a channel with the earliest start time, the data to be transmitted is sent on the channel, and the data to be transmitted is indicated. Sequence number and/or length; if the data to be transmitted cannot be completely transmitted on a certain channel, the data to be transmitted is split to be distributed and distributed on multiple channels, and the transmission needs to be indicated. The sequence number and fragmentation and/or length of the data on each channel.
The optical network device according to claim 27, wherein the first processing module is further configured to: encapsulate the data to be transmitted or data fragments on each channel into a data frame, and then transmit the data to the target ONU, and in the data frame. Carry at least one of the following: data serial number, data fragmentation, and length.
The optical network device according to claim 27, wherein the first processing module is further configured to allocate an uplink bandwidth to the ONU on each channel supported by the ONU, and overlap the bandwidth allocated by the ONU supporting multiple channels; The data is received on the channel, and the data frame sent by the ONU is collected according to the ONU information and/or the bandwidth allocation, and the received data is recombined according to the data transmission rule.
The optical network device according to claim 27, wherein the first processing module is further configured to: if there are multiple channels, the transmit start times are the earliest and the same, then the data preferentially transmits data uniformly on the channels.
The optical network device according to claim 27, wherein said first processing module is further configured to: if the channel increases when the next transmit start time is available, and/or the channel decreases when the transmit end time is available, then the data continues The updated channel is sent evenly until the data transmission is completed or all channels arrive at the transmission end time.
The optical network device according to any one of claims 27 to 32, wherein the transmission end time on the channel for transmitting data is similar: the transmission end time on the channel for transmitting data is the same; or the channel on which the data is transmitted The difference between the end times of transmissions is less than the preset time difference difference threshold.
The optical network device according to any one of claims 27 to 32, wherein the optical network device is provided in an OLT or is an independent entity.
An optical network device, comprising: a second acquiring module, and a second processing module; wherein

a second obtaining module configured to receive data on a channel supported by itself; obtain a number of channels supported by the transmitted data and/or a corresponding channel, and a transmittable state of the supported channel;

The second processing module is configured to receive the data frame according to the channel information and/or the address information in the received data frame and the local channel information and/or the address information of the ONU, and according to the sequence number and the fragmentation situation in the data frame, The received data fragments are reorganized.
The optical network device according to claim 35, wherein the second acquisition module is configured to:

When the ONU of the ONU supports a single channel, the data frame is received on the channel, and the corresponding data is parsed;

When the ONU of the ONU supports two or more channels, the data frame is received according to the channel information and/or the address information on the channel supported by the ONU, and the data is reorganized according to the sequence number and the fragmentation in the data frame.
The optical network device according to claim 35, wherein the second obtaining module is further configured to: acquire an uplink bandwidth allocated by the OLT on each channel supported by the ONU, and a transmittable state of the supported channel;

The second processing module is further configured to: allocate data to be transmitted to be transmitted on one or more supported channels, and transmit data preferentially on a channel that can transmit the earliest start time, and send the channel on which the data is transmitted. The end time is close or ends at the end of the transmittable time;

When the ONU supporting itself is supporting a single channel or obtaining bandwidth allocation only on one channel, the data to be transmitted is transmitted on the channel from the start time of the transmittable, and indicates the sequence number of the data to be transmitted and / or length;

When the ONU of the ONU supports two or more channels and obtains bandwidth allocation in two or more channels, if the data to be transmitted is completely transmitted on a channel with the earliest start time of transmission, the need is needed. The transmitted data is sent on the channel and indicates the sequence number and/or length of the data to be transmitted; if the data to be transmitted cannot be completely transmitted on a certain channel, the data to be transmitted is cut. The distribution is distributed over a plurality of channels and indicates the sequence number and fragmentation and/or length of the data to be transmitted on each channel.
The optical network device according to claim 37, wherein the second processing module is further configured to: if there are multiple channels, the transmission start time is the same, the data preferentially transmits data uniformly on the channels.
The optical network device according to claim 37, wherein said second processing module is further configured to: if the channel increases when the next transmit start time is available, and/or the channel decreases when the transmit end time is available, the data continues to be updated Uniformly transmitted on the channel until the data is sent or all channels arrive at the end of the transmission.
The optical network device according to any one of claims 35 to 39, wherein the device is provided in an ONU or is an independent entity.
A computer readable storage medium storing computer executable instructions for performing a method of implementing data transmission by a PON architecture of any of the rights 14 to 20, and/or the computer executable instructions A method for implementing data transmission by a PON architecture of any one of the rights 21 to 26.