WO2020134069A1

WO2020134069A1 - Method and related device for implementing channel adaptation in a pon

Info

Publication number: WO2020134069A1
Application number: PCT/CN2019/098393
Authority: WO
Inventors: 曾苗
Original assignee: 深圳市中兴微电子技术有限公司
Priority date: 2018-12-24
Filing date: 2019-07-30
Publication date: 2020-07-02
Also published as: CN111356038B; CN111356038A

Abstract

A method and related device for implementing channel adaptation in a PON. One of the method comprises: in the process of data transmission, when a Serial Number (SN) of a new ONU found out by an Optical Line Terminal (OLT) is same as the SN of the registered ONU, notifying the ONU of restarting channel registration.

Description

Method and related equipment for implementing channel adaptation in PON

Technical field

The embodiments of the present application relate to, but are not limited to, passive optical network (Passive Optical Network, PON) technology, and in particular, to a method and related equipment for implementing channel adaptation in a PON.

Background technique

With the development and popularization of high-traffic and high-bandwidth services such as interactive networks, users' demand for bandwidth will increase by an order of magnitude every three years. In order to meet the needs of users for large bandwidth and low latency in the longer term, they can The channel bonding technology in the PON system that meets the requirements of higher rates came into being.

For example, the NG-PON2 system proposes the concept of increasing the overall system capacity based on multiple wavelengths and multiple channels, that is, the PON system can aggregate two or more channels. However, there is no detailed solution for how to flexibly bind multiple channels.

Summary of the invention

The following is an overview of the topics detailed in this article. This summary is not intended to limit the scope of protection of the claims.

In view of this, the embodiments of the present application provide a method for implementing channel adaptation in a passive optical network (PON), including: when a new optical network unit (OLT) discovered by an optical line terminal (OLT) is discovered during data transmission ( When the serial number (SN) of the ONU) is the same as the serial number of the already registered ONU, the ONU is notified to restart channel registration.

An embodiment of the present application also provides a method for implementing channel adaptation in a PON, including: an ONU receiving a notification sent by an OLT to restart channel registration; the ONU chooses to disconnect during an idle period of data transmission and restart channel registration .

An embodiment of the present application also provides an apparatus for implementing channel adaptation in a PON, including: a discovery unit configured to discover whether the SN of a new ONU is the same as the SN of a registered ONU during data transmission; a notification unit , Set to notify the ONU to restart channel registration when the SN of the new ONU is found to be the same as the SN of the already registered ONU.

An embodiment of the present application also provides an apparatus for implementing channel adaptation in a PON, including: a receiving unit configured to receive a notification of restarting channel registration sent by an OLT; a registration unit configured to be dropped during an idle period of data transmission To restart channel registration.

An embodiment of the present application further provides an optical line terminal (OLT), including a memory, a processor, and a computer program stored on the memory and executable on the processor, and the computer program is used by the processor During execution, a method for implementing channel adaptation in the PON executed by the OLT described above is implemented.

An embodiment of the present application also provides an optical network unit (ONU), including a memory, a processor, and a computer program stored on the memory and executable on the processor, the computer program is used by the processor During execution, a method for implementing channel adaptation in the PON executed by the ONU described above is implemented.

Embodiments of the present application also provide a system for implementing channel adaptation in a PON, including the foregoing optical line terminal (OLT) and the foregoing optical network unit (ONU).

An embodiment of the present application further provides a computer-readable storage medium having an information processing program stored on the computer-readable storage medium. The information processing program is executed by a processor to implement any of the above-mentioned PON implementation channels The steps of the adaptive method.

Other features and advantages of the present application will be explained in the subsequent description, and partly become obvious from the description, or be understood by implementing the present application. The purpose and other advantages of the present application can be realized and obtained by the structures particularly pointed out in the description, claims and drawings.

Brief description of the drawings

The drawings are used to provide a further understanding of the technical solutions of the present application, and form a part of the specification. They are used to explain the technical solutions of the present application together with the embodiments of the present application, and do not constitute limitations on the technical solutions of the present application.

1 is a schematic flowchart of a method for implementing channel adaptation in a PON provided by an embodiment of this application;

2 is a schematic flowchart of another method for implementing channel adaptation in a PON provided by an embodiment of this application;

3 is a schematic diagram of a system for implementing channel adaptation in a PON provided by an embodiment of this application;

4 is a schematic flowchart of a method for implementing channel adaptation in a PON based on the system shown in FIG. 3;

5 is a schematic diagram of a traditional WDM and a data packet transmission method in an embodiment of this application;

6 is a schematic flowchart of an exemplary method for implementing channel adaptation in a PON provided by an embodiment of this application;

7 is a schematic diagram of single-channel, two-channel, three-channel, and four-channel ONU binding in an embodiment of the present application;

8 is a schematic diagram of binding when one of the four channels bound in the embodiment of the present application has a problem;

9 is a schematic diagram of an apparatus for implementing channel adaptation in a PON provided by an embodiment of this application;

10 is a schematic diagram of another apparatus for implementing channel adaptation in a PON provided by an embodiment of this application.

Elaborate

To make the objectives, technical solutions, and advantages of the present application clearer, the embodiments of the present application will be described in detail below in conjunction with the accompanying drawings. It should be noted that the embodiments in the present application and the features in the embodiments can be arbitrarily combined with each other without conflict.

The steps shown in the flowcharts of the figures can be performed in a computer system such as a set of computer-executable instructions. And, although a logical order is shown in the flowchart, in some cases, the steps shown or described may be performed in an order different from here.

An embodiment of the present application provides a method for implementing channel adaptation in a passive optical network (PON), which can re-register channels when the number of normally operating channels changes to provide users with wider bandwidth options.

FIG. 1 is a schematic flowchart of a method for implementing channel adaptation in a PON provided by an embodiment of this application. As shown in FIG. 1, the method provided in this embodiment includes:

Steps

101 and 102, during data transmission, when the serial number (SN) of the new ONU found by the optical line terminal (OLT) is the same as the serial number of the already registered ONU, the ONU is notified to restart channel registration.

Wherein, before notifying the ONU to restart channel registration, the method may further include: determining whether the bandwidth of the ONU is sufficient; if not enough, notifying the ONU to restart channel registration.

Before data transmission, the method may further include: the OLT performs channel registration with the ONU in the following manner: the OLT detects the connectivity status of all supported channels with the ONU; The channel in the connected state is bound to the ONU; data transmission is performed with the ONU through the bound channel.

Wherein, the OLT detecting the connectivity status of all channels supported by the ONU may include: the OLT interacting with the ONU on each of the channels to send physical layer operation management and maintenance (ploam) messages, respectively Perform channel registration; during the channel registration process, if the OLT does not receive the ploam response message sent by the ONU through at least one of the channels, the at least one channel is considered to be in a disconnected state, Other channels that can receive the ploam response message sent by the ONU are in a connected state.

Wherein, the ploam response message may include one of the following: a serial number (SN) response message and a ranging (Ranging) response message.

Wherein, the method may further include: in the process of data transmission, when at least one of the bound channels fails, notifying the ONU to go offline and restart channel registration.

Wherein, restarting channel registration may include: the OLT interacts with the ONU on each of all channels to send physical layer operation management and maintenance (ploam) messages to re-register the channel; During the channel registration process, if the OLT does not receive the ploam response message sent by the ONU through at least one of the channels, the at least one channel is considered to be in a disconnected state, and the other can receive the The channel of the ploam response message sent by the ONU is in a connected state; the channels in the connected state of all the channels are re-bound to the ONU; and the re-bound channel performs data transmission with the ONU.

Wherein, in the process of channel registration or the process of re-channel registration, each channel of all the channels is separately distance-measured, and each channel corresponds to its respective equalization delay.

Compared with the related art, the embodiments of the present application provide a method for implementing channel adaptation in a PON, including: during the data transmission process, when the SN of the new ONU discovered by the OLT is the same as the SN of the registered ONU To notify the ONU to restart channel registration. In this way, the maximum bandwidth can be selected for data transmission, which improves the data transmission rate.

FIG. 2 is a schematic flowchart of a method for implementing channel adaptation in a PON provided by an embodiment of the present application. As shown in FIG. 2, the method provided in this embodiment includes:

Step 201, the optical network unit (ONU) receives a notification sent by the OLT to restart channel registration;

In step 202, the ONU chooses to go offline during the idle period of data transmission, and restarts channel registration.

Wherein, the method may further include: before the ONU receives the notification of restarting channel registration sent by the OLT, the ONU performs channel registration with the OLT in the following manner: the ONU communicates with each of the supported channels The OLT separately sends physical layer operation management and maintenance (ploam) messages for channel registration, so that the OLT binds all connected channels to the ONU; the bound channels are connected to the ONU The OLT performs data transmission.

Wherein, during the channel registration process, each channel in the all channels is separately distanced, and the equalization delay corresponding to each bound channel sent by the OLT is received.

Wherein, the data transmission with the OLT through the bound channel may include: dividing each first data packet to be sent into a first number of sub-data packets, the first number being the The number of bound channels; according to the equalization delay corresponding to each bound channel, each sub-packet is separately transmitted through each bound channel.

Wherein, the method may further include: during the data transmission, if at least one of the bound channels fails, the ONU goes offline and restarts channel registration.

Wherein, the restart of channel registration may include: the ONU interacts with the OLT on each of all channels to send physical layer operation management and maintenance (ploam) messages to re-register the channel, so that the OLT Re-bind all the channels in the connected state with the ONU; perform data transmission with the OLT through the re-bound channel.

Wherein, in the process of re-registering channels, each channel of all the channels is separately distance-measured, and each channel corresponds to its own equalization delay.

Wherein, the data transmission with the OLT through the re-bound channel may include: dividing each second data packet to be sent into a second number of sub-data packets, the second number is The number of re-bonded channels is described; according to the equalization delay corresponding to each re-bonded channel, each sub-data packet is transmitted through each bonded channel separately.

The technical solutions provided by the foregoing embodiments of the present application are explained in detail below through two exemplary embodiments.

Passive Optical Network (PON) is an important technical means for user access. In related PON systems, usually an optical line terminal (OLT, optical terminal) is connected to an optical splitter through a main optical fiber, and the optical splitter (splitter) is connected to a plurality of user-side optical network units (ONU, Optical, Network and Unit) connection. At present, it is proposed in the related art that ONU and OLT can support sending and receiving data on multiple channels (wavelengths). For example, one of the technologies is to achieve a single channel (wavelength) rate of 25 gigabits per second (Gbps) (referred to as 25G), and can make it support single channel (single wavelength, the number of channels is 1), dual channel (2 wavelength , The number of channels is 2), three channels (3 wavelengths, the number of channels is 3) or four channels (4 wavelengths, the number of channels is 4), etc. ONU and OLT are under the same optical distribution network (ODN, optical distribution network) Coexistence and compatibility. As shown in Figure 3, the OLT supports four channels, namely four upstream and downstream wavelength pairs λ0/λ4, λ1/λ5, λ2/λ6, λ3/λ7; There are three types of ONUs, one is 25G ONU, which supports single channel, As shown in Figure 3, it supports upstream and downstream wavelength pairs λ0/λ4; one is 50G ONU, which supports dual channels, as shown in Figure 3, supports upstream and downstream wavelength pairs λ0/λ4, λ1/λ5; one is 100G ONU, namely Support four channels, as shown in Figure 3 to support the upstream and downstream wavelength pairs λ0/λ4, λ1/λ5, λ2/λ6, λ3/λ7. The ONU combines optical signals of different wavelengths into a bundle through a wavelength division multiplexer (WDM, Wavelength, Division Multiplexing), and transmits them along a single optical fiber.

When the number of channels supported by the authority (OLT) and the terminal (ONU) are different, there are two cases: 1) The number of channels supported by the two ends is different, as shown in Figure 3; 2) Some channels at both ends may be physically damaged (for example The optical module is damaged, etc.).

Based on the system shown in FIG. 3, the embodiments of the present application provide a solution that is compatible with single-channel (25G), dual-channel (50G), and quad-channel (100G), which can provide users with wider bandwidth options.

FIG. 4 is a schematic flowchart of a method for implementing channel adaptation in a PON provided by an embodiment of the present application, which is applied to the ONU registration process. As shown in FIG. 4, the method includes:

Step 401, the OLT sends a ploam (Physical Layer Operations, Administration and Maintenance, physical layer operation management and maintenance) request message on the four supported channels;

Wherein, the ploam request message may be a serial number (SN, Serial) request message, a ranging request message, and so on.

Step 402, the 25G ONU responds to the ploam response message on the single channel λ0/λ4;

Step 403, the 50G ONU responds to the ploam response message on the dual-channel λ0/λ4, λ1/λ5;

Step 404, the 100G ONU responds to the ploam response message on the four channels λ0/λ4, λ1/λ5, λ2/λ6, λ3/λ7;

The above steps 402 to 404 do not have a fixed sequence, wherein the response message corresponding to the request message may be a serial number (SN, Serial) Response (response) message, a ranging (response) message, etc., The response message carries the ONU logo.

In step 405, the OLT judges that it is in a connected state with a 25G ONU on a single channel λ0/λ4, and with a 50G ONU on a dual channel λ0/λ4, λ1/λ5 based on the response messages received from multiple channels. The ONU is in a connected state on the four channels λ0/λ4, λ1/λ5, λ2/λ6, λ3/λ7.

Step 406, the OLT binds the single-channel λ0/λ4 to the 25G ONU, binds the dual-channel λ0/λ4, λ1/λ5 to the 50G ONU, and binds the four-channel λ0/λ4, λ1/λ5, λ2/λ6, λ3/ λ7 is bound to 100G ONU.

Step 407, the OLT performs data interaction with the 25G ONU through a single channel λ0/λ4;

Step 408, the OLT performs data interaction with the 50G ONU through dual-channel λ0/λ4, λ1/λ5;

In step 409, the OLT performs data interaction with the 100G ONU through four channels λ0/λ4, λ1/λ5, λ2/λ6, λ3/λ7.

The above steps 407 to 409 have no fixed order.

Also for example, for 25G, 50G, 75G and 100G compatible solutions:

In one case, the OLT supports four channels (4X25G), and there are four types of ONUs, including single channel (1X25G), dual channel (2X25G), three channels (3X25G), and four channels (4X25G). Take the ONU that supports dual channels as an example, and the two channels of the ONU correspond to the 1st and 3rd channels of the OLT respectively. The OLT sends ploam request messages from channels 0 to 3 at the same time. It is found that only channels 1 and 3 receive the The ploam response message of the ONU supporting dual channels will bind the first and third channels accordingly as channels for interacting with the ONU supporting dual channels. The channel bonding process of other single-channel, three-channel and four-channel ONUs is similar.

In another case, during the ONU registration process, if there is a problem with a channel for an ONU that supports four channels (channels 0, 1, 2, and 3), such as an optical module with a high bit error, etc., this channel will not work properly. jobs. For example, the second channel of the ONU is abnormal. At this time, once the OLT does not receive the response from the four-channel ONU supporting the second channel, it will regard the four-channel ONU as the three-channel ONU. Channels 1 and 3 correspond to channels 0, 1, and 3 of the OLT, respectively, and perform three-channel binding to communicate with this ONU instead of directly thinking that this ONU cannot continue to be used.

There is also a situation where a multi-channel ONU has been bound. If a channel does not work normally during data exchange, for example, a data packet cannot be sent, the ONU can go offline and re-register the channel. For example, the ONU is an ONU that supports four channels (channels 0, 1, 2, and 3). During the data exchange process, the second channel cannot work properly. The ONU goes offline and re-registers. The OLT will rebind the ONU Channels 0, 1, 3, that is, the ONU becomes an ONU that supports three channels. If the second channel returns to normal, the OLT will periodically broadcast to discover a new ONU. At this time, the OLT discovers the identification of the new ONU discovered from the second channel, such as the serial number (SN), which is the same as the registered ONU. There is a new channel available, you can notify the ONU to re-register, the ONU can be dropped during the idle period of data transmission, re-register the channel, the OLT will re-bind the channel 0, 1, 2, 3 for the ONU. The ONU becomes an ONU that supports four channels again. In addition, before the OLT notifies the ONU to re-register the channel, it can also determine whether the bandwidth of the ONU is sufficient. If it is not enough, notify the ONU to restart the channel registration; if enough Yes, without notification, the ONU maintains three channels, and at this time the OLT can also notify the ONU to turn off the light corresponding to the newly restored channel.

In this embodiment, the rate of each wavelength (channel) is the same and is 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 upstream and downstream rates of each wavelength may not be exactly the same. When the rate of each channel is exactly the same, the data packet to be sent is completely evenly distributed on multiple channels, and when the rate of each channel is not completely the same, the data packet to be sent can be at the rate of multiple channels The ratio is evenly distributed across multiple channels. As shown in Figure 5, the left side is the traditional WDM system data packet transmission method. The first data packet is divided into 4 sub-data packets in order on channel 0 (wavelength λ0), and the second data packet is divided into 4 sub-data packets The data packets are sent in order on channel 1 (wavelength λ1), the third data packet is divided into 4 sub-data packets in order on channel 2 (wavelength λ2), and the fourth data packet is divided into 4 sub-data packets in the channel 3 (wavelength λ3) is sent in order, and so on, the time to receive each data packet requires the transmission time of 4 sub-data packets, and the intermediate data needs to be buffered; the right side is the system after channel bonding in the embodiment of the present application The transmission method of the data packet. The first data packet is divided into 4 sub-data packets that are sent simultaneously on channels 0, 1, 2, and 3 (wavelengths λ0, λ1, λ2, and λ3). The same is true of other data packets, which can be received at the same time. Each data packet no longer needs to cache all intermediate data.

The embodiments of the present application provide a 25G, 50G, 75G, and 100G coexistence and upgrade network architecture implementation method, so that users have a further choice in the choice of bandwidth, and traditional WDM (WavelengthDivision Multiplexing, wavelength division Multiplexing) system comparison, the delay of the data packet is reduced to 1/4, and the buffer requirement for the receiver at the same rate can also be reduced. Moreover, for physical anomalies, the greatest possible remedy is that ONUs that support multiple channels only need to reduce the number of bonded channels when the channel fails, rather than completely unusable; and when the failed channel returns to normal, the OLT can Through the discovery mechanism, the normal channel is recovered, and then through re-registration, the maximum bandwidth can be selected for data transmission, which improves the data transmission rate.

The following uses the registration process of 100G GPON ONU (supporting four channels) as an example to explain in detail the scheme for implementing channel adaptation. Among them, OLT supports four channels (channel 0: λ0/λ4, channel 1: λ1/λ5, channel 2: λ2/λ6, channel 3: λ3/λ7), ONU also supports four channels (channel 0: λ0/λ4, channel 1: λ1/λ5, channel 2: λ2/λ6, channel 3: λ3/λ7), and the rate of each channel is 25G.

FIG. 6 is a schematic flowchart of a method for implementing channel adaptation provided by an embodiment of the present application. As shown in FIG. 6, the method includes:

In step 601, the OLT independently delivers the physical layer operation management and maintenance profile_ploam messages on the four channels;

Among them, before this, the ONU is activated and acquires the synchronization of the downlink PHY (physical) frame on the four channels respectively, and enters the O2 state.

Among them, ONU has 7 kinds of states: Initial state (Initial-state) O1, standby state (Standby-state) O2, serial number state (Serial-Number-state) O3, ranging state O4, running state (Operation-state) O5, POPUP state (POPUP-state) O6, emergency stop state (Emergency-Stop-state) O7.

Step 602, the ONU responds to the ploam response message on the four channels;

After the ONU is in the O2 state, the upstream burst parameter templates are respectively obtained through the corresponding channels.

Wherein, when the ploam message is an SN request message, the ploam response message is an SN response message, and the ONU is in the O3 state; then the OLT assigns the ONU-ID to the ONU and enters the O4 state. That is, when the ONU receives the SN request, it sends SN ploam messages (four channels correspond to the same SN); after receiving the SN ploam response message, the OLT sends the corresponding assign ononid via four channels (one SN corresponds to one onuid) , So the four channels correspond to the same onuid), the ONU receives this ploam message and sets its own onuid, default alloc_id, port_id to enter the ranging state (O4).

Wherein, when the ploam message is a ranging (Ranging) request message, the ploam response message is a Ranging response message. After that, the OLT measures the distance for each channel, that is, the OLT separately measures the distance of each channel of the ONU (because each channel has a different wavelength and the same physical distance, the delay of each channel will have a certain deviation). Each channel is separately measured, and the four-channel received data at the OLT end does not need to be aligned in theory. The four-channel data received can be aligned through ranging (since the OLT is one-to-many to the ONU, this is equivalent Since the channel alignment can be divided equally among each ONU, instead of focusing on the OLT, and the active compensation of the sender is easier to achieve than the passive alignment of the receiver), the OLT sends the equalization delay of each channel through the ranging_time message. ONU can enter the O5 state.

Step 603, the OLT binds the four channels to the ONU;

Among them, because the four channels of the ONU are registered separately, when the ONU is in the O5 state, the OLT knows how many channels the ONU has, and can bind these channels to the ONU for data interaction. The ONU is the same, according to each The status of a channel can also know the binding status of its own channel, and can communicate with the OLT through the corresponding binding form.

Among them, when the ONU is a single channel, two channels, or three channels, similar to the above process, the OLT can also identify the number of channels of each ONU according to the number of the same SN received by the four channels, and then perform the corresponding bound communication . As shown in Figure 7, from left to right are single channel (λ0/λ4), two channels (λ1/λ5, λ2/λ6), three channels (0/λ4, λ1/λ5, λ3/λ7), four channels (0/λ4, λ1/λ5, λ2/λ6, λ3/λ7) Schematic diagram of ONU binding.

Step 604, the OLT and the ONU perform data transmission through the bound four channels;

Among them, the way of data transmission in the downstream direction, as shown in the right diagram of Figure 5, the first data packet is divided into four sub-data packets in channels 0, 1, 2, 3 (wavelengths λ0, λ1, λ2, λ3) is sent at the same time, the same is true for other data packets, and each data packet can be sent at the same time.

In the upstream direction, each data packet can be divided into 4 sub-data packets. Since the delay of each channel will have a certain deviation, the ONU can delay the transmission of the corresponding sub-data packet according to the equalization delay corresponding to each channel obtained during ranging, thereby ensuring that the OLT can receive the data packet at the same time Child packet. Of course, the ONU can also send the sub-data packets of each data packet at the same time, and the OLT can receive the sub-data packets within a certain time slot and sort and merge the sub-data packets into the data packets according to certain rules.

In this embodiment, the rate of each channel is the same, and the data packet can be evenly divided according to the number of bound channels. If the rate of each channel is different, the data packet can be divided according to the number of bound channels and the rate ratio of multiple channels, so as to ensure that the OLT can receive the sub-data packets of the data packet at the same time.

Step 605: When at least one of the bound channels of the ONU has a problem, the ONU goes offline and re-registers.

For example, as shown in Figure 8, one of the four bonded channels (eg, channel 0, λ0/λ4) has a problem (eg, the channel is physically abnormal) and cannot transmit data, then returns to step 601, at which the ONU can only Reply to the ploam response message on the remaining three channels (channels 1, 2, and 3 (λ1/λ5, λ2/λ6, λ3/λ7)), thereby performing the three channels 1, 2, and 3 with the ONU Bind and interact with data. At this time, since the OLT can only establish a synchronization relationship with the three channels of this ONU, the ONU is considered to be a three-channel ONU. In addition, in the subsequent communication process, if channel 0 returns to normal, the OLT will periodically broadcast to discover a new ONU. At this time, the OLT discovers the identity of the new ONU discovered from channel 0, such as the serial number SN, and the ONU that has been registered. The same, it means that the ONU has a new channel available, you can notify the ONU to re-register, the ONU can be dropped during the idle period of data transmission, re-register the channel, the OLT will re-bind the channel 0, 1, for the ONU 2, 3, that is, the ONU becomes an ONU that supports four channels; in addition, before the OLT notifies the ONU to re-register the channel, it can also determine whether the bandwidth of the ONU is enough, and if it is not enough, notify the ONU to restart Start channel registration; if it is enough, you can send no notification, the ONU maintains three channels, and at this time the OLT can also notify the ONU to turn off the light corresponding to the newly restored channel.

9 is a schematic structural diagram of an apparatus for implementing channel adaptation in a PON provided by an embodiment of the present application. As shown in FIG. 9, the device provided in this embodiment includes: a discovery unit 901 and a notification unit 902; wherein, the discovery unit 901 is configured to discover whether the SN of the new ONU and the registered ONU during data transmission. The SN is the same; the notification unit 902 is configured to notify the ONU to restart channel registration when the SN of the new ONU is found to be the same as the SN of the already registered ONU.

Wherein, the device provided in this embodiment may further include: a judgment unit configured to judge whether the bandwidth of the ONU is sufficient before informing the ONU to restart channel registration; if not enough, the notification unit 902 notifies the ONU Restart channel registration.

Among them, the device provided in this embodiment may further include: a channel registration unit, which is configured to perform channel registration with the ONU in the following manner before data transmission: detect the connectivity status of all supported channels with the ONU; A channel in a connected state among all the channels is bound to the ONU; data transmission is performed with the ONU through the bound channel.

Wherein, the channel registration unit may be set to detect the connectivity status of all supported channels with the ONU by: interacting with the ONU and sending physical layer operation management and maintenance (ploam) messages on each of the all channels, respectively Carry out channel registration; during the channel registration process, if the ONU does not receive the ploam response message sent by at least one of the all channels, the at least one channel is considered to be in a disconnected state, and the other can receive The channel to the ploam response message sent by the ONU is in a connected state.

Wherein, the ploam response message may include one of the following: SN response message, ranging response message.

The notification unit 902 may be further configured to notify the ONU to go offline and restart channel registration if at least one of the bound channels fails during data transmission.

Wherein, the channel registration unit can also be set to restart channel registration by: interacting with the ONU and sending physical layer operation management and maintenance (ploam) messages on each of the all channels to re-register the channel; During the process of re-registering the channel, if the ploam response message sent by the ONU through at least one of the channels is not received, the at least one channel is considered to be in a disconnected state, and the other can receive all The channel of the ploam response message sent by the ONU is in a connected state; the channels in the connected state of all the channels are re-bound to the ONU; and the re-bound channel performs data transmission with the ONU.

Wherein, in the process of channel registration or in the process of re-channel registration, each channel of all the channels is separately ranged, and each channel corresponds to its respective equalization delay.

FIG. 10 is a schematic structural diagram of another apparatus for implementing channel adaptation in a PON provided by an embodiment of the present application. As shown in FIG. 10, the device provided in this embodiment includes: a receiving unit 1001 and a registration unit 1002; wherein, the receiving unit 1001 is configured to receive a notification of restarting channel registration sent by the OLT; the registration unit 1002 is configured to transmit data During the idle period, the channel registration is restarted.

Wherein, the registration unit 1002 may be configured to perform channel registration with the OLT in the following manner before receiving the notification of restarting channel registration sent by the OLT: interacting with the OLT on each of the supported channels to send the physical layer separately Operation management and maintenance (ploam) messages are used for channel registration, so that the OLT binds all the channels in the connected state to the device; and performs data transmission with the OLT through the bound channels.

The registration unit 1002 may be configured to perform data transmission with the OLT through the bound channel by dividing each first data packet to be sent into a first number of sub-data packets, the first The number is the number of the bound channels; according to the equalization delay corresponding to each bound channel, each sub-data packet is separately transmitted through each bound channel for data transmission.

Wherein, the registration unit 1002 may also be configured to, during the data transmission, if at least one of the bound channels fails, then disconnect and restart channel registration.

Wherein, the registration unit 1002 may be set to restart channel registration by: interacting with the OLT and sending physical layer operation management and maintenance (ploam) messages on each channel of all channels to re-register the channel, so that the The OLT rebinds all the channels in the connected state with the device; and performs data transmission with the OLT through the rebound channel.

Wherein, the registration unit 1002 is configured to perform data transmission with the OLT through the re-bound channel by dividing each second data packet to be sent into a second number of sub-data packets, the second The number is the number of the re-bonded channels; according to the equalization delay corresponding to each re-bonded channel, each sub-data packet is separately transmitted through each bonded channel for data transmission.

An embodiment of the present application further provides an optical line terminal (OLT), including a memory, a processor, and a computer program stored on the memory and executable on the processor, and the computer program is used by the processor During execution, the method for implementing channel adaptation in the PON described in any one of the above OLT implementations is implemented.

An embodiment of the present application also provides an optical network unit (ONU), including a memory, a processor, and a computer program stored on the memory and executable on the processor, the computer program is used by the processor The method for implementing channel adaptation in the PON described in any one of the above-mentioned ONUs is implemented during execution.

An embodiment of the present application further provides a system for implementing channel adaptation in a PON, which includes the optical line terminal OLT described in any one of the foregoing items and the optical network unit (ONU) described in any one of the foregoing items.

Those of ordinary skill in the art may understand that all or some of the steps, systems, and functional modules/units in the method disclosed above may be implemented as software, firmware, hardware, and appropriate combinations thereof. In a hardware implementation, the division between the functional modules/units mentioned in the above description does not necessarily correspond to the division of physical components; for example, one physical component may have multiple functions, or one function or step may be composed of several physical The components are executed in cooperation. Some or all components may be implemented as software executed by a processor, such as a digital signal processor or microprocessor, or as hardware, or as an integrated circuit, such as an application specific integrated circuit. Such software may be distributed on computer-readable media, which may include computer storage media (or non-transitory media) and communication media (or transitory media). As is well known to those of ordinary skill in the art, the term computer storage medium includes both volatile and nonvolatile implemented in any method or technology for storing information such as computer readable instructions, data structures, program modules, or other data Sex, removable and non-removable media. Computer storage media include but are not limited to RAM, ROM, EEPROM, flash memory or other memory technologies, CD-ROM, digital versatile disk (DVD) or other optical disk storage, magnetic cartridges, magnetic tape, magnetic disk storage or other magnetic storage devices, or may Any other medium used to store desired information and accessible by a computer. In addition, it is well known to those of ordinary skill in the art that the communication medium generally contains computer readable instructions, data structures, program modules, or other data in a modulated data signal such as a carrier wave or other transmission mechanism, and may include any information delivery medium .

Although the embodiments disclosed in the present application are as above, the content described is only the embodiments adopted to facilitate understanding of the present application, and is not intended to limit the present application. Any technical person in the field to which this application belongs, without departing from the spirit and scope disclosed in this application, can make any modifications and changes in the form and details of implementation, but the patent protection scope of this application still needs to The scope defined by the appended claims shall prevail.

Claims

A method for channel adaptation in PON includes:

During data transmission, when the serial number SN of the new optical network unit ONU discovered by the optical line terminal OLT is the same as the SN of the already registered ONU, the ONU is notified to restart channel registration.
The method according to claim 1, further comprising: before notifying the ONU to restart channel registration, determining whether the bandwidth of the ONU is sufficient; if not enough, notifying the ONU to restart channel registration.
The method according to claim 1, further comprising: before data transmission, the OLT performs channel registration with the ONU in the following manner:

The OLT detects the connectivity status of all the channels supported by the OLT and the ONU;

Bind all the channels in the connected state to the ONU;

Performing data transmission with the ONU through the bound channel.
The method according to claim 3, wherein the OLT detecting the connectivity status of all supported channels with the ONU, including:

The OLT interacts with the ONU on each of the channels to send physical layer operation management and maintenance ploam messages for channel registration;

During the channel registration process, if the OLT does not receive the ploam response message sent by the ONU through at least one of the channels, the at least one channel is considered to be in a disconnected state, and the other can receive The channel of the ploam response message sent by the ONU is in a connected state.
The method according to claim 4, wherein the ploam response message includes one of the following: a serial number SN response message, a ranging Ranging response message.
The method according to claim 3, further comprising: during data transmission, when at least one of the bound channels fails, notifying the ONU to go offline and restart channel registration.
The method according to claim 1 or 6, wherein the restarting channel registration includes:

The OLT interacts with the ONU on each of all channels to send physical layer operation management and maintenance ploam messages to re-register channels;

In the process of re-registering the channel, if the OLT does not receive the ploam response message sent by the ONU through at least one of the channels, the at least one channel is considered to be in a disconnected state, and the other can The channel receiving the ploam response message sent by the ONU is in a connected state;

Binding all the channels in the connected state to the ONU again;

Performing data transmission with the ONU through the re-bound channel.
The method according to claim 1 or 3 or 6, wherein in the process of channel registration or in the process of re-channel registration, each channel in all channels is separately measured, and each channel corresponds to its own Equalization delay.
A method for channel adaptation in PON includes:

The optical network unit ONU receives the notification of restarting channel registration sent by the optical line terminal OLT;

The ONU chooses to go offline during the idle period of data transmission and restart channel registration.
The method according to claim 9, further comprising: before the ONU receives the notification of restarting channel registration sent by the OLT, the ONU performs channel registration with the OLT in the following manner:

The ONU interacts with the OLT on each of the supported channels to send physical layer operation management and maintenance ploam messages for channel registration, so that the OLT connects the channels in the connected state of the all channels with the ONU Binding

Perform data transmission with the OLT through the bound channel.
The method according to claim 10, wherein, during the channel registration process, each channel of all the channels is separately ranging, and the equalization delay corresponding to each bound channel sent by the OLT is received. Time.
The method according to claim 10, wherein the data transmission with the OLT through the bound channel includes:

Divide each first data packet to be sent into a first number of sub-data packets, where the first number is the number of the bound channels;

According to the equalization delay corresponding to each bound channel, each sub-data packet is separately transmitted through each bound channel.
The method according to claim 10, further comprising: during the data transmission, if at least one of the bound channels fails, the ONU goes offline and restarts channel registration.
The method according to claim 9 or 13, wherein the restarting channel registration includes:

The ONU interacts with the OLT on each of all channels to send physical layer operation management and maintenance ploam messages to re-register channels, so that the OLT reconnects all channels in the connected state with all Describe ONU binding;

Data transmission is performed with the OLT through the re-bound channel.
The method according to claim 14, wherein, in the process of re-registering a channel, each channel of the all channels is separately ranging, and each channel corresponds to a respective equalization delay.
The method according to claim 15, wherein the data transmission with the OLT through the re-bound channel includes:

Divide each second data packet to be sent into a second number of sub-data packets, where the second number is the number of the re-bound channels;

According to the equalization delay corresponding to each re-bonded channel, each sub-packet is separately transmitted through each bonded channel for data transmission.
A device for implementing channel adaptation in PON includes:

The discovery unit is set to discover whether the serial number SN of the ONU of the new optical network unit is the same as the SN of the registered ONU during data transmission;

The notification unit is configured to notify the ONU to restart channel registration when the serial number SN of the new ONU is found to be the same as the SN of the already registered ONU.
A device for implementing channel adaptation in PON includes:

The receiving unit is set to receive the notification of restarting channel registration sent by the optical line terminal OLT;

The registration unit is set to go offline during the idle period of data transmission and restart channel registration.
An optical line terminal OLT includes a memory, a processor, and a computer program stored on the memory and executable on the processor, and the computer program is implemented by the processor as claimed in claims 1 to 8. A method for implementing channel adaptation in PON described in any one of the above.
An optical network unit ONU, including a memory, a processor, and a computer program stored on the memory and capable of running on the processor, the computer program being implemented by the processor as claimed in claims 9 to 16 A method for implementing channel adaptation in PON described in any one of the above.
A system for implementing channel adaptation in a PON includes the optical line terminal OLT of claim 19 and the optical network unit ONU of claim 20.
A computer-readable storage medium storing an information processing program, which when executed by a processor implements the steps of the method for implementing channel adaptation in a PON according to any one of claims 1 to 16.