WO2015074275A1

WO2015074275A1 - Optical line terminal, distribution point unit, system and data stream scheduling method

Info

Publication number: WO2015074275A1
Application number: PCT/CN2013/087778
Authority: WO
Inventors: 隋猛; 石操
Original assignee: 华为技术有限公司
Priority date: 2013-11-25
Filing date: 2013-11-25
Publication date: 2015-05-28
Also published as: CN104956633B; CN104956633A

Abstract

Provided are an optical line terminal, a distribution point unit, a system and a data stream scheduling method. The optical line terminal (OLT) in the present invention comprises: a receiving module, a scheduling module and a sending module, wherein the receiving module is used for receiving a data stream sent to a plurality of customer premises equipment (CPE) from a network side, and storing the data stream into a plurality of buffer queues corresponding to the CPE; the scheduling module is connected to the receiving module, and is used to schedule data streams in the plurality of buffer queues corresponding to the CPE in the same group to the same data stream queue according to grouping information about the CPE; and the sending module is used for sending a data stream in a data stream queue to a distribution point unit (DPU) through a data stream established with the DPU. The embodiments of the present invention reduce the complexity and power consumption of a DPU, the buffer requirements of the DPU, and the number of data stream connections between an OLT and the DPU.

Description

TECHNICAL FIELD The present invention relates to optical fiber communication technologies, and in particular, to an optical line terminal, a distribution point unit, a system, and a data flow scheduling method. Background technique

Passive Optical Network (PON) technology is a point-to-multipoint optical access technology. It consists of optical line terminals (OLTs) on the central side and optical network units on the user side. Optical Network Unit (ONU) or Optical Network Terminal (ONT) and Optical Distribution Network (ODN). The so-called "passive" means that the ODN does not contain any active electronic devices and electronic power supplies, all of which are composed of passive components such as splitters, so the cost of management and maintenance is low. The Fiber To The Distribution Point (FTTd) distribution point (DP) to the Customer Premises (CP) device is non-fiber, such as twisted pair, coaxial Cables, power lines, etc.; devices on the DP side are the Distributed Point Units (DPUs).

FIG. 1 is a schematic diagram of data flow scheduling in the prior art. As shown in FIG. 1 , in the prior art, data flow scheduling of Customer Premises Equipment (CPE) is implemented, and the following method is generally adopted: Office, abbreviated as CO), creates a GEM connection for each CPE between the OLT and the DPU. In the DPU, creates at least one buffer queue for each CPE (multiple buffer queues may be required according to different QoS requirements) · In the DPU, according to the QoS configuration, the data of the buffer queues of multiple CPEs in the same packet are scheduled and forwarded to the packet queue of the packet; the data stream data in the packet queue is modulated and sent to the CPE. After the CPE demodulates the data stream, it filters out the corresponding data stream according to its own ID.

The problem in the prior art is that the buffer queue in the DPU has a relatively large demand and a high cost, and the power consumption of the scheduling mechanism in the DPU is large. Summary of the invention Embodiments of the present invention provide an optical line terminal, a distribution point unit, a system, and a data flow scheduling method, to overcome the problems of high cost and high power consumption of the DPU in the prior art.

The first aspect of the present invention provides an optical line terminal OLT, including:

a receiving module, a scheduling module, and a sending module;

The receiving module is configured to receive a data stream that is sent from the network side to the plurality of customer premises equipment CPEs, and store the data stream in a plurality of buffer queues corresponding to the CPE;

The scheduling module is connected to the receiving module, and configured to schedule, according to the packet information of the CPE, the data flows in the buffer queue corresponding to the CPEs belonging to the same group into the same data flow queue;

The sending module is connected to the scheduling module, and configured to send the data stream in the data stream queue to the DPU through a data stream connection established with the distribution point unit DPU.

With reference to the first aspect, in a first possible implementation manner of the first aspect, the receiving module is further configured to: receive the group information reported by the DPU, where the group information is when the DPU is started or Reported when the group information changes.

In conjunction with the first aspect, or the first possible implementation of the first aspect, in a second possible implementation manner of the first aspect, the sending module is further configured to:

The mapping information of the data flow queue to the packet queue is sent to the DPU; wherein the packet queue is a queue in the DPU that stores the data flow in the data flow queue.

In a second aspect, an embodiment of the present invention provides a distribution point unit DPU, including:

a receiving module, a processing module, and a sending module;

The receiving module is connected to the processing module, and configured to receive, by using a data stream connection established with the optical line terminal OLT, the data stream sent by the OLT; the data stream is sent from the network side to multiple user premises equipments. a set of data flows of the CPE; wherein, the plurality of CPEs belong to the same group according to the group information of the CPE;

The processing module is configured to store the data stream sent by the OLT into a packet queue, where the packet queue has a one-to-one correspondence with the data stream queue;

The sending module is connected to the processing module and configured to send a data stream stored in the packet queue.

With reference to the second aspect, in a first possible implementation manner of the second aspect, the receiving module is further configured to:

Receiving mapping information of the data flow queue sent by the OLT to the packet queue. With reference to the second aspect, or the first possible implementation manner of the second aspect, in the second possible implementation manner of the second aspect, the sending module is further configured to:

When the DPU starts or the packet information changes, the packet information is sent to the OLT.

In a third aspect, an embodiment of the present invention provides a passive optical network system, including:

The optical line terminal OLT according to any of the first aspect, the first and second possible implementations of the first aspect, and the at least one first and second possible implementations of the second aspect, the second aspect A distribution point unit DPU as described in any of the above.

In a fourth aspect, an embodiment of the present invention provides a data flow scheduling method, including:

Receiving a data stream sent from the network side to the plurality of customer premises equipment CPEs, and storing the data stream in a plurality of buffer queues corresponding to the CPE;

And scheduling, according to the group information of the CPE, the data streams in the buffer queue corresponding to the CPE belonging to the same group to the same data stream queue;

The data stream in the data stream queue is sent to the DPU through a data stream connection established with the distribution point unit DPU.

With reference to the fourth aspect, in a first possible implementation manner of the fourth aspect, the method further includes:

And receiving the group information reported by the DPU, where the group information is reported when the DPU is started or the group information is changed.

With reference to the fourth aspect, or the first possible implementation manner of the fourth aspect, in a second possible implementation manner of the fourth aspect, the method further includes:

In a fifth aspect, an embodiment of the present invention provides a data flow scheduling method, including:

Receiving, by the data stream connection established with the optical line terminal OLT, the data stream sent by the OLT; the data stream is a set of data streams sent from the network side to the plurality of customer premises equipment CPEs; wherein, the multiple CPEs are based on The group information of the CPE belongs to the same group;

And storing the data stream sent by the OLT into a packet queue; wherein the packet queue is in one-to-one correspondence with the data stream queue;

Sending a data stream stored in the packet queue.

With reference to the fifth aspect, in a first possible implementation manner of the fifth aspect, the Before the sent data stream is stored in a packet queue, it also includes:

And receiving mapping information of the data flow queue sent by the OLT to the packet queue.

With reference to the fifth aspect, or the first possible implementation manner of the fifth aspect, in a second possible implementation manner of the fifth aspect, the method further includes:

In a sixth aspect, an embodiment of the present invention provides an optical line terminal device, including:

a processor and a memory, the memory storing execution instructions, when the optical line terminal device is in operation, the processor is in communication with the memory, the processor executing the execution instruction to cause the optical line terminal device The method of the first and second possible implementations of the fourth aspect, the fourth aspect is performed.

In a seventh aspect, an embodiment of the present invention provides a device for allocating a point unit, including:

a processor and a memory, the memory storing execution instructions, when the distribution point unit device is in operation, the processor is in communication with the memory, the processor executing the execution instruction such that the distribution point unit device The method of the first and second possible implementations of the fifth aspect, the fifth aspect is performed.

The optical line terminal, the distribution point unit, the system, and the data flow scheduling method of the embodiment of the present invention receive, by the OLT, a data stream sent from the network side to the plurality of customer premises equipment CPE, and store the data stream in the plurality of Configuring a buffer queue corresponding to the CPE, and scheduling data streams in the buffer queue corresponding to the CPE belonging to the same group to the same data flow queue according to the packet information of the CPE, where the data flow queue is The data stream is sent to the DPU through a data stream connection established with the distribution point unit DPU, and the DPU stores the received data stream in a packet queue corresponding to the data stream queue, wherein the packet queue and the data The flow queues are in one-to-one correspondence, and finally the DPU sends the data stream stored in the packet queue to each CPE, and the scheduling function in the DPU is transferred to the OLT, which reduces the complexity and power consumption of the DPU, and reduces the buffering requirement of the DPU. Compared with the prior art, it is not necessary to establish a buffer queue for each CPE, which reduces the number of data stream connections between the OLT and the DPU, and solves the present problem. There are problems in the technology of DPU, high cost and high power consumption. DRAWINGS

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following will be true. BRIEF DESCRIPTION OF THE DRAWINGS The accompanying drawings, which are required to be used in the description of the prior art, are briefly described. It is obvious that the drawings in the following description are some embodiments of the present invention, and no one would be creative to those skilled in the art Other drawings can also be obtained from these drawings on the premise of labor.

1 is a schematic diagram of data flow scheduling in the prior art;

2 is a topological structure of an FTTdp system according to an embodiment of the present invention;

3 is a schematic structural diagram of Embodiment 1 of an optical line terminal OLT according to the present invention;

4 is a schematic diagram of data flow scheduling according to an embodiment of the present invention;

FIG. 5 is a schematic structural diagram of Embodiment 1 of a distribution point unit DPU according to the present invention;

6 is a schematic structural diagram of an embodiment of a fiber-to-distribution point FTTdp system according to the present invention;

7 is a flowchart of Embodiment 1 of a data flow scheduling method according to the present invention;

8 is a flowchart of Embodiment 2 of a data flow scheduling method according to the present invention;

9 is a schematic structural diagram of Embodiment 1 of an optical line terminal device according to the present invention;

FIG. 10 is a schematic structural diagram of Embodiment 1 of a distribution point unit device according to the present invention. The technical solutions in the embodiments of the present invention are clearly and completely described in the following with reference to the accompanying drawings in the embodiments of the present invention. The embodiments are a part of the embodiments of the invention, and not all of the embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative efforts are within the scope of the present invention.

2 is a topological structure of an FTTdp system according to an embodiment of the present invention.

The embodiment of the present invention can be applied to the FTTdp. As shown in FIG. 2, the topological features of the present invention are as follows: The optical interface between the OLT and the DPU on the central office is PON (including GPON, EPON, 10GGPON, 10GEPON, etc.). ), the device between the DPU and the CPE is a non-fiber connection, which can be a copper wire, a twisted pair cable, a coaxial cable, a power line, etc., and a P2MP connection between the DPU and the CPE, and the uplink and downlink multiplexing modes are all TDMA.

FIG. 3 is a schematic structural diagram of Embodiment 1 of an optical line terminal OLT according to the present invention. FIG. 4 is a schematic diagram of data flow scheduling according to an embodiment of the present invention. The executor of this embodiment is an optical line terminal OLT on the office side, and the OLT can be implemented by software and/or hardware. The solution of this embodiment is applied in the FTTdp system. As shown in FIG. 3, the optical line terminal OLT 30 of this embodiment may include: a receiving module 301, scheduling The module 302 and the sending module 303 are configured to receive the data stream sent from the network side to the plurality of customer premises equipment CPEs, and store the data stream in a plurality of buffer queues corresponding to the CPE; And the receiving module 301 is configured to schedule, according to the group information of the CPE, the data stream in the buffer queue corresponding to the CPE belonging to the same group to be in the same data stream queue; the sending module 303 is connected to the scheduling module 302, and is configured to The data stream in the flow queue is sent to the DPU through a data stream connection established with the distribution point unit DPU.

Specifically, as shown in FIG. 3 and FIG. 4, the receiving module 301 of the OLT receives the data streams corresponding to the multiple CPEs and stores them in multiple buffer queues corresponding to the CPEs. The scheduling module 302 schedules the data streams in the buffer queue corresponding to the CPEs of the CPE belonging to the same group to the same data stream queue according to the group information of the CPE. Here, the number of packets may be multiple, and each packet corresponds to one data stream queue. The sending module 303 sends the data stream in the data stream queue to the DPU through a data stream connection established with the distribution point unit DPU, so that the DPU stores the received data stream in a packet queue corresponding to the data stream queue. The packet queue has a one-to-one correspondence with the data flow queue. Different PON networks have different data stream connections, such as GPON for GEM connection, 10G-GPON for XGEM, Ethernet Passive Optical Network (EPON), and lOG-EPON for logical link identifier (Logical Link). Identifier (referred to as LLID) Connection or Virtual Local Area Network (VLAN) connection.

Optionally, the receiving module 301 is further configured to: receive the group information reported by the DPU, where the group information is reported when the DPU is started or the group information is changed.

Specifically, the receiving module 301 receives the packet information of the CPE reported by the DPU, and the scheduling module 302 schedules the data streams of the multiple CPEs according to the grouping information of the CPE, and schedules the data streams of the CPEs of the same group into the same data stream queue.

Optionally, the sending module 303 is further configured to:

The mapping information of the data flow queue to the packet queue is sent to the DPU; wherein, the packet queue is a queue for storing the data flow in the data flow queue in the DPU.

Specifically, the sending module 303 of the OLT sends the mapping information of the data stream queue to the packet queue to the DPU, and the DPU stores the data stream of the received data stream queue into the packet queue corresponding to the data stream queue according to the mapping information.

In this embodiment, the data stream sent from the network side to the plurality of customer premises equipment CPEs is received by the OLT, and the data stream is stored in a plurality of buffer queues corresponding to the CPE, and the group information according to the CPE will belong to the same The data flow in the buffer queue corresponding to the packetized CPE is scheduled to the same In the data flow queue, the data flow in the data flow queue is sent to the DPU through a data flow connection established with the distribution point unit DPU, and the scheduling function in the DPU is transferred to the OLT, thereby reducing the complexity and work of the DPU. It consumes and reduces the buffering requirement of the DPU and the number of data stream connections between the OLT and the DPU, and solves the problem of high cost and high power consumption of the DPU in the prior art.

FIG. 5 is a schematic structural diagram of Embodiment 1 of a distribution point unit DPU according to the present invention. The execution body of this embodiment is a distribution point unit DPU, which can be implemented by software and/or hardware. The solution of this embodiment is applied in the FTTdp system. As shown in FIG. 5, the distribution point unit DPU50 of the present embodiment may include: a receiving module 501, a processing module 502, and a sending module 503. The receiving module 501 is connected to the processing module 502 for establishing with the optical line terminal OLT. The data stream is connected to the data stream sent by the OLT; the data stream is a set of data streams sent from the network side to the plurality of customer premises equipment CPEs; wherein, the plurality of CPEs belong to the same group according to the group information of the CPE;

The processing module 502 is configured to store the data stream sent by the OLT into a packet queue; wherein, the group queue has a one-to-one correspondence with the data stream queue;

The sending module 503 is connected to the processing module 502 for transmitting the data stream stored in the packet queue. Specifically, as shown in FIG. 4 and FIG. 5, the receiving module 501 of the DPU receives the data stream sent by the OLT, and the processing module 502 stores the data stream sent by the OLT into a packet queue, where the data stream is sent from the network side to multiple A collection of data streams for the same grouped CPE. The existing DPU, as shown in FIG. 1, has a buffer queue for storing data streams for each CPE, and needs to schedule data streams of multiple CPEs into the packet queue, which has high cost and large power consumption.

The sending module 503 processes the data stream in the packet queue and processes it to each CPE. Optionally, the receiving module 501 is further configured to:

Receiving mapping information of the data flow queue sent by the OLT to the packet queue.

Specifically, the received data stream is stored in a corresponding packet queue according to the mapping information of the received data stream queue to the packet queue.

Optionally, the sending module 503 is further configured to:

Specifically, when the DPU starts or the packet information of the CPE changes, the CPE packet information is sent to the OLT, so that the OLT schedules the data flows of the multiple CPEs according to the packet information.

In this embodiment, the DPU receives the data stream sent by the OLT through a data stream connection established with the optical line terminal OLT; the data stream is a set of data streams sent from the network side to the multiple CPEs, where the multiple CPEs are grouped according to the CPE group information. Is belonging to the same group, and stores the data stream sent by the OLT. Go to a packet queue, where the packet queue is in one-to-one correspondence with the data flow queue, and the data stream stored in the packet queue is sent to each CPE, and the scheduling function in the DPU is transferred to the 0LT, thereby reducing the complexity of the DPU and The power consumption is reduced, and the buffering requirement of the DPU is reduced. Compared with the prior art, there is no need to establish a buffer queue for each CPE, which reduces the number of data stream connections between the OLT and the DPU, and solves the high cost of the DPU in the prior art. , the problem of large power consumption.

FIG. 6 is a schematic structural diagram of an embodiment of a fiber-to-distribution point FTTdp system according to the present invention. As shown in FIG. 6, the system of this embodiment may include: any optical line terminal OLT30 and at least one distribution point unit in the optical line terminal OLT embodiment. Any of the distribution point units DPU50 in the DPU embodiment.

The protocol in the FTTdp of this embodiment may be, for example, any TDM PON protocol such as GPON, 10G-GPON, EPON or 10G-EPON.

FIG. 7 is a flowchart of Embodiment 1 of a data flow scheduling method according to the present invention. The execution body of this embodiment is an optical line terminal OLT on the office side, and the OLT can be implemented by software and/or hardware. The solution of this embodiment is applied in the FTTdp system. As shown in FIG. 7, the method in this embodiment may include:

Step 701: Receive a data flow sent from a network side to a plurality of customer premises equipment CPEs, and store the data flow in a plurality of buffer queues corresponding to the CPE.

Step 702: Schedule, according to the group information of the CPE, the data streams in the buffer queue corresponding to the CPEs belonging to the same group to be in the same data stream queue.

Step 703: Send the data stream in the data flow queue to the DPU through a data stream connection established with the distribution point unit DPU.

Optionally, the method in this embodiment may further include:

The packet information reported by the DPU is received, and the packet information is reported when the DPU is started or the packet information is changed.

Optionally, the method in this embodiment may further include:

The mapping information of the data flow queue to the packet queue is sent to the DPU.

In the method of the embodiment, the technical solution of the embodiment is implemented by using the OLT of the embodiment shown in FIG. 3, and the implementation principle and the technical effect are similar, and details are not described herein again.

FIG. 8 is a flowchart of Embodiment 2 of a data flow scheduling method according to the present invention. The execution body of this embodiment is a distribution point unit DPU, and the DPU can be implemented by software and/or hardware. The solution of this embodiment is applied to the FTTdp system. As shown in FIG. 8, the method in this embodiment may include:

Step 801: Receive a number sent by the OLT through a data flow connection established with the optical line terminal OLT. The data stream is a set of data streams sent from the network side to the plurality of customer premises equipment CPEs; wherein, the plurality of CPEs belong to the same group according to the group information of the CPE.

Step 902: Store the data stream sent by the OLT into a packet queue. The packet queue has a one-to-one correspondence with the data stream queue.

Step 903: Send a data stream stored in a packet queue.

Optionally, before storing the data stream sent by the OLT into a packet queue, the method further includes: receiving mapping information of the data flow queue sent by the OLT to the packet queue.

Optionally, the method in this embodiment may further include:

The technical solution of the embodiment is implemented by using the DPU of the embodiment shown in FIG. 5, and the implementation principle and technical effects are similar, and details are not described herein again.

FIG. 9 is a schematic structural diagram of Embodiment 1 of an optical line terminal device according to the present invention. As shown in FIG. 9, the optical line terminal device 90 provided in this embodiment includes a processor 901 and a memory 902. Optical line termination device 90 may also include a transmitter 903, a receiver 904. Transmitter 903 and receiver 904 can be coupled to processor 901. The transmitter 903 is configured to transmit data or information, the receiver 904 is configured to receive data or information, and the memory 902 stores execution instructions. When the optical line terminal device 90 is in operation, the processor 901 communicates with the memory 902, and the processor 901 The execution instructions in the memory 902 are used to execute the technical solution of the method embodiment shown in FIG. 7. The implementation principle and technical effects are similar, and details are not described herein again.

FIG. 10 is a schematic structural diagram of Embodiment 1 of a distribution point unit device according to the present invention. As shown in FIG. 10, the distribution point unit device 100 provided in this embodiment includes a processor 1001 and a memory 1002. The distribution point unit device 100 may further include a transmitter 1003 and a receiver 1004. Transmitter 1003 and receiver 1004 can be coupled to processor 1001. The transmitter 1003 is configured to transmit data or information, the receiver 1004 is configured to receive data or information, and the memory 1002 stores execution instructions. When the distribution point unit device 100 is in operation, the processor 1001 communicates with the memory 1002. The processor 1001 The execution instructions in the memory 1002 are used to perform the technical solution of the method embodiment shown in FIG. 8. The implementation principle and technical effects are similar, and details are not described herein again.

In the several embodiments provided by the present application, it should be understood that the disclosed apparatus and method may be implemented in other manners. For example, the device embodiments described above are only schematic. For example, the division of the unit or module is only a logical function division. In actual implementation, there may be another division manner, for example, multiple units or modules may be used. Combine or can be integrated into another system System, or some features can be ignored, or not executed. In addition, the mutual coupling or direct coupling or communication connection shown or discussed may be an indirect coupling or communication connection through some interface, device or module, and may be electrical, mechanical or otherwise.

The modules described as separate components may or may not be physically separate. The components displayed as modules may or may not be physical modules, that is, may be located in one place, or may be distributed to multiple network units. Some or all of the modules may be selected according to actual needs to achieve the objectives of the solution of the embodiment.

One of ordinary skill in the art will appreciate that all or a portion of the steps of implementing the various method embodiments described above can be accomplished by hardware associated with the program instructions. The aforementioned program can be stored in a computer readable storage medium. The program, when executed, performs the steps including the foregoing method embodiments; and the foregoing storage medium includes: a medium that can store program codes, such as a ROM, a RAM, a magnetic disk, or an optical disk.

It should be noted that the above embodiments are merely illustrative of the technical solutions of the present invention, and are not intended to be limiting; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art The technical solutions described in the foregoing embodiments may be modified, or some or all of the technical features may be equivalently replaced; and the modifications or substitutions do not deviate from the technical solutions of the embodiments of the present invention. range.

Claims

claims

1. An optical line terminal OLT, which is characterized by including:

Receiving module, scheduling module and sending module;

Wherein, the receiving module is used to receive data streams sent from the network side to multiple customer premises equipment CPEs, and store the data streams in multiple buffer queues corresponding to the CPEs;

The scheduling module is connected to the receiving module and is used to schedule the data flows in the buffer queue corresponding to the CPE belonging to the same group to the same data flow queue according to the grouping information of the CPE;

The sending module is connected to the scheduling module and is used to send the data flow in the data flow queue to the DPU through the data flow connection established with the distribution point unit DPU.

2. The OLT according to claim 1, wherein the receiving module is further configured to: receive the grouping information reported by the DPU, and the grouping information is generated when the DPU starts or the grouping information occurs. Reported when changes are made.

3. The OLT according to claim 1 or 2, wherein the sending module is further configured to: send mapping information from the data flow queue to the packet queue to the DPU; wherein, the packet queue is the The DPU stores a queue of data flows in the data flow queue.

4. A distribution point unit DPU, characterized by including:

Receiving module, processing module and sending module;

Wherein, the receiving module is connected to the processing module and is used to receive the data stream sent by the OLT through the data stream connection established with the optical line terminal OLT; the data stream is sent from the network side to multiple user premises equipment. A collection of data flows of CPEs; wherein, the multiple CPEs belong to the same group according to the grouping information of the CPEs;

The processing module is configured to store the data flow sent by the OLT into a packet queue; wherein, the packet queue corresponds to the data flow queue one-to-one;

The sending module is connected to the processing module and is used to send the data stream stored in the packet queue.

5. The DPU according to claim 4, wherein the receiving module is further configured to: receive the mapping information from the data flow queue to the packet queue sent by the OLT.

6. The DPU according to claim 4 or 5, characterized in that the sending module is further configured to: when the DPU starts or the grouping information changes, send the packet to the OLT. Group information.

7. A passive optical network system, characterized by including:

The optical line terminal OLT according to any one of claims 1 to 3 and at least one distribution point unit DPU according to any one of claims 4 to 6.

8. A data flow scheduling method, characterized by including:

Receive data streams sent from the network side to multiple customer premises equipment CPEs, and store the data streams in multiple buffer queues corresponding to the CPEs;

Schedule the data flows in the buffer queue corresponding to the CPE belonging to the same group to the same data flow queue according to the grouping information of the CPE;

The data flow in the data flow queue is sent to the DPU through the data flow connection established with the distribution point unit DPU.

9. The method according to claim 8, further comprising:

Receive the grouping information reported by the DPU. The grouping information is reported when the DPU starts or the grouping information changes.

10. The method according to claim 8 or 9, further comprising:

Send the mapping information of the data flow queue to the packet queue to the DPU; wherein the packet queue is a queue in the DPU that stores the data flow in the data flow queue.

11. A data flow scheduling method, characterized by including:

Receive the data stream sent by the OLT through the data stream connection established with the optical line terminal OLT; the data stream is a collection of data streams sent from the network side to multiple customer premises equipment CPE; wherein, the multiple CPEs are based on The group information of the CPE belongs to the same group;

Store the data flow sent by the OLT into a packet queue; wherein, the packet queue corresponds to the data flow queue one-to-one;

Send the data stream stored in the packet queue.

12. The method according to claim 11, characterized in that, before storing the data stream sent by the OLT into a packet queue, it further includes:

Receive mapping information from the data flow queue to the packet queue sent by the OLT.

13. The method according to claim 11 or 12, further comprising: when the DPU starts or the grouping information changes, sending the grouping information to the OLT.

14. An optical line terminal equipment, characterized by including: A processor and a memory. The memory stores execution instructions. When the optical line terminal equipment is running, there is communication between the processor and the memory. The processor executes the execution instructions so that the optical line terminal equipment The method as claimed in any one of claims 8 to 10 is carried out.

15. A distribution point unit device, characterized in that it includes:

A processor and a memory. The memory stores execution instructions. When the allocation point unit device is running, the processor communicates with the memory. The processor executes the execution instructions so that the allocation point unit device The method as claimed in any one of claims 11 to 13 is carried out.