CN111356038A - A method for realizing channel adaptation in a PON and related equipment - Google Patents

Abstract

The embodiment of the invention discloses a method for realizing channel self-adaptation in a PON and related equipment, wherein one of the methods comprises the following steps: in the process of data transmission, when the serial number SN of the new ONU discovered by the OLT is the same as that of the registered ONU, the ONU is informed to restart channel registration. Therefore, the maximum bandwidth can be selected for data transmission, and the data transmission rate is improved.

Description

A method for realizing channel adaptation in a PON and related equipment

technical field

The embodiments of the present invention relate to, but are not limited to, the passive optical network PON technology, and more particularly relate to a method and related equipment for realizing 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. The channel bonding technology in the PON system with higher rate requirements emerges as the times require.

For example, in the NG-PON2 system, the concept of improving the capacity of the entire system based on multi-wavelength and multi-channel is proposed, that is, the PON system can aggregate two or more channels. However, there is no detailed implementation scheme in the prior art on how to flexibly perform multi-channel binding.

SUMMARY OF THE INVENTION

In view of this, an embodiment of the present invention provides a method for implementing channel adaptation in a passive optical network PON, including:

In the process of 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 the channel registration.

Embodiments of the present invention also provide a method for implementing channel adaptation in a PON, including:

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

The ONU chooses to drop the line during the idle period of data transmission and restart the channel registration.

An embodiment of the present invention also provides a device for implementing channel adaptation in a PON, including:

The discovery unit is used to find out whether the serial number SN of the new ONU is the same as the serial number of the already registered ONU in the process of data transmission;

The notification unit is configured to notify the ONU to restart the channel registration when it is found that the serial number SN of the new ONU is the same as the serial number of the already registered ONU.

An embodiment of the present invention also provides a device for implementing channel adaptation in a PON, including:

a receiving unit, configured to receive the notification of restarting the channel registration sent by the OLT;

The registration unit is used to drop the line during the idle period of data transmission and restart the channel registration.

An embodiment of the present invention also provides an optical line terminal OLT, which is characterized by comprising a memory, a processor, and a computer program stored in the memory and running on the processor, and the computer program is executed by the When executed by the processor, the method for implementing channel adaptation in the PON executed by the above-mentioned OLT is implemented.

Embodiments of the present invention also provide an optical network unit ONU, which is characterized by comprising a memory, a processor, and a computer program stored in the memory and running on the processor, the computer program being When executed by the processor, the method for implementing channel adaptation in the PON executed by the above ONU is implemented.

An embodiment of the present invention further provides a system for realizing channel adaptation in a PON, including the above-mentioned optical line terminal OLT and the above-mentioned optical network unit ONU.

Embodiments of the present invention further provide a computer-readable storage medium, where an information processing program is stored on the computer-readable storage medium, and when the information processing program is executed by a processor, implements any one of the above-mentioned implementation channels in the PON The steps of the adaptive method.

Compared with the related art, the embodiment of the present invention provides a method and related equipment for realizing channel adaptation in a PON, wherein one of the methods includes: in the process of data transmission, when the optical line terminal OLT discovers a new ONU; When the serial number SN is the same as the serial number of the already registered ONU, the ONU is notified to restart the channel registration. In this way, the maximum bandwidth can be selected for data transmission, which increases the data transmission rate.

Other features and advantages of the present invention will be set forth in the description which follows, and in part will be apparent from the description, or may be learned by practice of the invention. The objectives and other advantages of the invention may be realized and attained by the structure particularly pointed out in the description, claims and drawings.

Description of drawings

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

1 is a schematic flowchart of a method for implementing channel adaptation in a PON according to Embodiment 1 of the present invention

FIG. 2 is a schematic flowchart of a method for implementing channel adaptation in a PON according to Embodiment 2 of the present invention

3 is a schematic diagram of a system for implementing channel adaptation in a PON according to Embodiment 3 of the present invention;

4 is a schematic flowchart of a method for implementing channel adaptation in a PON according to Embodiment 3 of the present invention;

5 is a schematic diagram of a data packet transmission mode in a conventional WDM and an embodiment of the present invention;

6 is a schematic flowchart of a method for implementing channel adaptation according to Embodiment 4 of the present invention;

7 is a schematic diagram of binding of single-channel, two-channel, three-channel, and four-channel ONUs in Embodiment 4 of the present invention;

8 is a schematic diagram of binding when a problem occurs in one of the four channels bound in Embodiment 4 of the present invention;

9 is a schematic structural diagram of an apparatus for implementing channel adaptation in a PON according to Embodiment 5 of the present invention;

FIG. 10 is a schematic structural diagram of another apparatus for implementing channel adaptation in a PON according to Embodiment 6 of the present invention.

Detailed ways

In order to make the objectives, technical solutions and advantages of the present invention clearer, the embodiments of the present invention will be described in detail below with reference to the accompanying drawings. It should be noted that, the embodiments in the present application and the features in the embodiments may be arbitrarily combined with each other if there is no conflict.

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

The embodiment of the present invention provides a solution for realizing channel adaptation in a passive optical network PON, which can re-register the channel when the number of channels in normal operation changes, so as to provide users with wider bandwidth options.

Example 1

FIG. 1 is a schematic flowchart of a method for implementing channel adaptation in a PON according to Embodiment 1 of the present invention. As shown in FIG. 1 , the method includes:

Step 101, in the process of data transmission, when the serial number SN of the new ONU discovered by the optical line terminal OLT is the same as the serial number of the already registered ONU, the ONU is notified to restart the channel registration.

Wherein, before notifying the ONU to restart the channel registration, the method further includes:

Determine whether the bandwidth of the ONU is sufficient;

If not enough, the ONU is notified to restart the channel registration.

Wherein, before performing data transmission, the OLT and the ONU perform channel registration, including:

The connected state of all channels supported by the OLT detection and the ONU;

Binding the channel in the connected state in all channels with the ONU;

Data transmission is performed with the ONU through the bound channel.

Wherein, the OLT detects the connectivity status of all channels supported by the ONU, including:

The OLT interacts with the ONU on each of the all channels to send physical layer operation management and maintenance ploam messages to perform channel registration, respectively,

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 all channels, it is considered that the at least one channel is in a disconnected state, and other channels can receive The channel of the ploam response message sent by the ONU is in a connected state.

Wherein, the ploam response message includes one of the following:

Sequence number SN response message, ranging response message.

Wherein, the method also includes:

In the process of data transmission, if at least one of the bound channels fails, the ONU disconnects and restarts the channel registration.

Wherein, the restarting the channel registration includes:

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

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 all channels, it is considered that the at least one channel is in a disconnected state, and other channels can be The channel receiving the ploam response message sent by the ONU is in a connected state;

Re-binding the channel in the connected state in the all channels with the ONU;

Data transmission is performed with the ONU through the re-bound channel.

Wherein, in the process of channel registration or the process of re-performing channel registration, the ranging is independently measured for each channel in all the channels, and each channel corresponds to its own equalization delay.

Embodiment 2

FIG. 2 is a schematic flowchart of a method for implementing channel adaptation in a PON according to Embodiment 2 of the present invention. As shown in FIG. 2 , the method includes:

Step 201, the optical network unit ONU receives the notification of restarting the channel registration sent by the OLT;

Step 202, the ONU chooses to drop the line during the idle period of data transmission, and restart the channel registration.

Wherein, before the ONU receives the notification of restarting the channel registration sent by the OLT, the ONU and the OLT perform channel registration, including:

The ONU interacts with the optical line terminal OLT on each of all the supported channels to send physical layer operation management and maintenance ploam messages respectively to register the channels, so that the OLT connects the channels in the connected state among the all channels with the ONU binding;

Data transmission is performed with the OLT through the bound channel.

Wherein, in the process of the channel registration, ranging is independently measured for each of the all channels, 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 includes:

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

According to the equalization delay corresponding to each of the bound channels, each sub-packet is transmitted through each of the bound channels respectively.

Wherein, the method further includes: in the process of performing the data transmission, if at least one of the bound channels fails, the ONU is disconnected and restarts the channel registration.

Wherein, the restarting the channel registration includes:

The ONU interacts with the OLT on each of the all channels to send physical layer operation management and maintenance ploam messages to re-register the channel, so that the OLT re-registers the channel in the connected state among the all channels. Bind with the ONU;

Data transmission is performed with the OLT through the re-bound channel.

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

Wherein, performing data transmission with the OLT through the re-bound channel includes:

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

According to the equalization delay corresponding to each re-bound channel, each sub-packet is transmitted through each of the bound channels respectively.

The technical solutions provided by Embodiments 1 and 2 of the present invention are described in detail below through two specific embodiments.

Embodiment 3

A passive optical network (Passive Optical Network, PON) is an important technical means for user access. In an existing PON system, an optical line terminal (OLT) is usually connected to an optical splitter through a main fiber, and the optical splitter is connected to multiple user-side optical network units (ONUs) through branch fibers. Currently, it is proposed in the related art that the ONU and the OLT can support sending and receiving data on multiple channels (wavelengths). For example, one of the technologies is that a single channel (wavelength) rate achieves 25 gigabits per second (Gbps) (abbreviated as 25G), and can make it possible to support single channel (single wavelength, the number of channels is 1), dual channel (2 wavelengths) , 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) and other ONUs and OLTs coexist under the same optical distribution network ODN (optical distribution network) and compatible. As shown in Figure 3, the OLT supports four channels, which are four uplink and downlink wavelength pairs λ0/λ4, λ1/λ5, λ2/λ6, λ3/λ7; there are three ONUs, one is 25GONU, which supports a single channel. As shown in Figure 3, it supports the uplink and downlink wavelength pairs λ0/λ4; one is a 50G ONU, which supports dual channels, as shown in Figure 3, supports the uplink and downlink wavelength pairs λ0/λ4, λ1/λ5; one is a 100G ONU, that is Four channels are supported, as shown in Figure 3, the uplink and downlink wavelength pairs λ0/λ4, λ1/λ5, λ2/λ6, λ3/λ7 are supported. The ONU combines the 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 office end (OLT) and the terminal (ONU) are different, there are two cases: 1) The number of channels supported by both ends is different, as shown in Figure 3; 2) Some channels at both ends may be physically damaged (for example, A certain channel of the optical module is damaged, etc.).

Based on the system shown in FIG. 3 , Embodiment 3 of the present invention provides a solution for realizing single-channel (25G), dual-channel (50G), and four-channel (100G) compatibility, which can provide users with wider bandwidth options.

4 is a schematic flowchart of a method for implementing channel adaptation in a PON according to Embodiment 3 of the present invention, which is applied to the process of ONU registration. As shown in FIG. 4 , the method includes:

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

Wherein, the ploam request message may be a serial number SN (Serial Number) request request message, a ranging request request message, etc.

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

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

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

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

Step 405: According to the response messages received from each channel, the OLT determines that it is in a connected state with the 25G ONU on the single-channel λ0/λ4, is connected with the 50G ONU on the dual-channel λ0/λ4 and λ1/λ5, and is in a connected state with the 100G ONU. Connected on 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 50GONU, and binds the four-channel λ0/λ4, λ1/λ5, λ2/λ6, λ3/λ7 Binding with 100G ONU;

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

Step 408, the OLT exchanges data with the 50G ONU through dual channels λ0/λ4 and λ1/λ5;

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

The above steps 407-409 have no fixed sequence.

Also for example, for 25G/50G/75G/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 an ONU that supports dual channels as an example, and the two channels of the ONU correspond to the first and third channels of the OLT, respectively. The OLT sends ploam request messages from channels 0 to 3 at the same time, and it is found that only channels 1 and 3 receive messages from the According to the ploam response message of the ONU supporting dual channels, channels 1 and 3 will be bound as channels for interaction with the ONU supporting dual channels. The channel binding 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 of an ONU that supports four channels (channel 0, 1, 2, 3), for example, the bit error of the optical module is too high, etc., this channel cannot be normal. Work. For example, the second channel of the ONU is abnormal. At this time, once the OLT cannot receive the response of the second channel from the ONU that supports four channels, it will use the four channel ONU as a three channel, and consider the 0th channel of this ONU. Channels 1 and 3 correspond to channels 0, 1, and 3 of the OLT, respectively. Based on this, three-channel binding is performed to communicate with the ONU, instead of directly thinking that the ONU cannot be used any more.

In another case, a multi-channel ONU has been bound. If a certain channel fails to work normally during data exchange, for example, data packets cannot be sent, the ONU can re-register the channel after being disconnected. For example, the ONU is an ONU that supports four channels (channel 0, 1, 2, 3). During the data exchange process, the second channel cannot work normally. The ONU is disconnected and re-registered, and the OLT will re-bind the ONU. Channels 0, 1, and 3, that is, the ONU becomes an ONU supporting three channels. If the second channel returns to normal, the OLT will regularly broadcast to discover the new ONU. At this time, the OLT finds that the identifier of the new ONU generated from the second channel, such as the serial number SN, is the same as the registered ONU, indicating that the ONU has a new ONU. The channel can be used, and the ONU can be notified to re-register. The ONU can be disconnected in the idle device of data transmission and re-register the channel. The OLT will re-bind channels 0, 1, 2, and 3 for the ONU, that is, the ONU changes again. become an ONU supporting four channels; in addition, before the OLT notifies the ONU to re-register the channel, it can also judge whether the bandwidth of the ONU is sufficient, if not, notify the ONU to restart the channel registration; If no notification is sent, the ONU maintains three channels, and at this time, the OLT can also notify the ONU to turn off the light emitter corresponding to the newly restored channel.

In the third 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 exactly the same, for example, the rate of each wavelength may be different from 25G , the uplink and downlink rates of each wavelength may not be exactly the same. When the rate of each channel is exactly the same, the data packets to be sent are completely and evenly distributed on each channel, and when the rates of each channel are not exactly the same, the data packets to be sent can be evenly distributed according to the rate ratio of each channel distributed to each channel. As shown in Figure 5, the left side is the transmission method of traditional WDM system data packets. The first data packet is divided into 4 sub-data and sent in sequence on channel 0 (wavelength λ0), and the second data packet is divided into 4 sub-data It is sent in sequence on channel 1 (wavelength λ1), the third packet is divided into 4 sub-data and sent in sequence on channel 2 (wavelength λ2), and the fourth data packet is divided into 4 sub-data on channel 3 (wavelength λ3). ) in order, and by analogy, the time to receive each data packet requires the transmission time of 4 sub-data, and the intermediate data needs to be cached; the right side is the transmission mode of the system data packet after the channel is bound in the embodiment of the present invention , the first data packet is divided into 4 sub-data and sent at the same time on channels 0, 1, 2, 3 (wavelengths λ0, λ1, λ2, λ3), the same is true for other data packets, each data packet can be received at the same time, also It is no longer necessary to cache all intermediate data.

The technical solution provided by the third embodiment of the present invention provides an implementation method of 25G/50G/75G/100G coexistence and upgrade network architecture, so that users have a further choice in bandwidth selection, which is different from traditional WDM ( Compared with the Wavelength Division Multiplexing (Wavelength Division Multiplexing) system, 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. At the same time, the physical abnormality can be remedied to the greatest extent, that is, the ONU supporting multi-channel only needs to reduce the number of bound channels when the channel fails, instead of being completely unavailable; and when the faulty channel returns to normal, the OLT can pass The discovery mechanism discovers the restored channel, and then re-registers to select the maximum bandwidth for data transmission, which improves the data transmission rate.

Embodiment 4

Embodiment 4 of the present invention takes the registration process of a 100G GPON ONU (supporting four channels) as an example to describe in detail a solution for realizing channel adaptation. Among them, OLT supports four channels (channel 0: λ0/λ4, channel 1: λ1/λ5, channel 2: λ2/λ6, channel 3: λ3/λ7), and 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 in Embodiment 4 of the present invention. As shown in FIG. 6 , the method includes:

Step 601, the OLT independently delivers the profile_ploam message on the four channels;

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

Among them, the existing ONU has 7 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(O7).

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

Wherein, after the ONU is in the O2 state, it obtains the upstream burst parameter template through the corresponding channel.

Wherein, when the ploam message is a serial number SN request message, the ploam response message is an SN response message, and the ONU is in the O3 state; then the OLT allocates an ONU-ID for the ONU and enters the O4 state. That is, when the ONU receives the SN request, it sends SN ploam messages respectively (four channels correspond to the same SN number); after the OLT receives the SN ploam response message, it sends the corresponding assign onuid ploam (one SN corresponds to one onuid) through four channels. , so the four channels correspond to the same onuid), the ONU receives the ploam message, sets its own onuid, the default alloc_id, and port_id enter the ranging state (O4).

Wherein, when the ploam message is a ranging request message, the ploam response message is a Ranging response message. After that, the OLT performs ranging for each channel, that is, the OLT measures the distance of each channel of the ONU separately (due to the different wavelengths of each channel and the same physical distance, the delay of each channel will have a certain deviation). Each channel measures the distance independently. In theory, the four channels of received data on the OLT end do not need to be aligned. Through ranging, the received data of the four channels can be guaranteed to be aligned (because the OLT is one-to-many to the ONU, this is equivalent to Since the channel alignment can be divided equally among each ONU, instead of letting the OLT do it centrally, and the sender's active compensation is easier to implement than the receiver's passive alignment.) The OLT sends the equalization delay of each channel through the ranging_time ploam message. ONU can enter the O5 state.

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

Among them, since 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 exchange. The ONU is also the same. The state 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 single-channel, two-channel, or three-channel, 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 binding communication . As shown in Figure 7, from left to right are single-channel (λ0/λ4), two-channel (λ1/λ5, λ2/λ6), three-channel (0/λ4, λ1/λ5, λ3/λ7), four-channel (0/λ4, λ1/λ5, λ2/λ6, λ3/λ7) Binding diagram of ONU.

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

Among them, in the downstream direction, the way of data transmission, as shown in the right side of Figure 5, the first data packet is divided into 4 sub-data on channels 0, 1, 2, 3 (wavelengths λ0, λ1, λ2, λ3 respectively). ) at the same time, and the same is true for other packets, each of which can be sent at the same time.

Among them, in the upstream direction, each data packet can be divided into 4 sub-data. Since the delay of each channel will have a certain deviation, the ONU can send the corresponding sub-data with a delay according to the equalized delay corresponding to each channel obtained during ranging, so as to ensure that the OLT can receive the data packets at the same time. subdata. Of course, the ONU can also send the sub-data of each data packet at the same time, and the OLT can receive the sub-data in a certain time slot and sort and merge the sub-data into the data packet according to certain rules.

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

Step 605, when at least one of the channels bound to the ONU has a problem, the ONU is disconnected and re-registered.

Among them, for example, as shown in Figure 8, if there is a problem (such as channel physical abnormality) in one of the four bound channels (such as channel 0, λ0/λ4), and the data cannot be transmitted, then return to step 501, at which time the ONU The ploam response message can only be replied on the remaining three channels (channels 1, 2, 3 (λ1/λ5, λ2/λ6, λ3/λ7)), so that the three channels 1, 2, 3 are connected with the described ONU performs binding and data interaction. At this time, since the OLT can only establish a synchronization relationship with the three channels of the ONU, it is considered that the ONU is a three-channel ONU. In addition, in the subsequent communication process, if the channel 0 returns to normal, the OLT will periodically broadcast to discover the new ONU. At this time, the OLT finds the identifier of the new ONU generated from the 0th channel, such as the serial number SN, which is the same as the ONU that has already been registered. , it means that the ONU has a new channel that can be used, and the ONU can be notified to re-register. The ONU can be disconnected from the idle device of data transmission and re-register the channel. The OLT will re-bind channels 0, 1, and 2 for the ONU. 3, that is, the ONU becomes an ONU supporting four channels; in addition, before the OLT notifies the ONU to re-register the channel, it can also judge whether the bandwidth of the ONU is sufficient, and if not, notify the ONU to restart Channel registration; if it is enough, no notification can be sent, the ONU maintains three channels, and the OLT can also notify the ONU to turn off the light emitter corresponding to the newly restored channel at this time.

Embodiment 5

FIG. 9 is a schematic structural diagram of a device for implementing channel adaptation in a PON according to Embodiment 5 of the present invention. As shown in FIG. 9 , the device includes:

The discovery unit is used to find out whether the serial number SN of the new ONU is the same as the serial number of the already registered ONU in the process of data transmission;

The notification unit is configured to notify the ONU to restart the channel registration when it is found that the serial number SN of the new ONU is the same as the serial number of the already registered ONU.

wherein, it also includes a judging unit for notifying the ONU to restart the channel registration,

Determine whether the bandwidth of the ONU is sufficient;

If it is not enough, the notification unit notifies the ONU to restart the channel registration.

Wherein, before performing data transmission, perform channel registration with the ONU, including:

Detect the connectivity status of all supported channels and the ONU;

Binding the channel in the connected state in all channels with the ONU;

Data transmission is performed with the ONU through the bound channel.

Among them, the connection status of all supported channels and ONUs is detected, including:

On each of the all channels, the ONU interacts with the ONU to send physical layer operation management and maintenance ploam messages respectively to perform channel registration,

In the process of the channel registration, if the ploam response message sent by the ONU through at least one of the all channels is not received, it is considered that the at least one channel is in a disconnected state, and other channels can receive the ONU The channel on which the ploam response message was sent is connected.

Wherein, the ploam response message includes one of the following:

Sequence number SN response message, ranging response message.

Wherein, in the process of data transmission, if at least one of the bound channels fails, the ONU is disconnected and restarts the channel registration.

Wherein, the restarting the channel registration includes:

On each of the all channels, the physical layer operation management and maintenance ploam messages are respectively exchanged with the ONU 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 all channels is not received, it is considered that the at least one channel is in a disconnected state, and the others can receive all the channels. The channel of the ploam response message sent by the ONU is in a connected state;

Re-binding the channel in the connected state in the all channels with the ONU;

Data transmission is performed with the ONU through the re-bound channel.

Wherein, in the process of channel registration or the process of re-performing channel registration, the ranging is independently measured for each channel in all the channels, and each channel corresponds to its own equalization delay.

Embodiment 6

FIG. 10 is a schematic structural diagram of another device for implementing channel adaptation in a PON according to Embodiment 6 of the present invention. As shown in FIG. 10 , the device includes:

a receiving unit, configured to receive the notification of restarting the channel registration sent by the OLT;

The registration unit is used to drop the line during the idle period of data transmission and restart the channel registration.

Wherein, before receiving the notification of restarting the channel registration sent by the OLT, perform channel registration with the OLT, including:

On each of all the supported channels, the OLT interacts with the optical line terminal OLT to send physical layer operation management and maintenance ploam messages respectively for channel registration, so that the OLT connects the channels in the connected state of all the channels with the device. bind;

Data transmission is performed with the OLT through the bound channel.

Wherein, in the process of the channel registration, ranging is independently measured for each of the all channels, 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 includes:

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

According to the equalization delay corresponding to each of the bound channels, each sub-packet is transmitted through each of the bound channels respectively.

Wherein, during the data transmission process, if at least one of the bound channels fails, the device is disconnected and restarts the channel registration.

Wherein, the restarting the channel registration includes:

Send physical layer operation management and maintenance ploam messages with the OLT on each of the all channels respectively to re-register the channels, so that the OLT reconnects the channels in the connected state among the all channels with the device binding;

Data transmission is performed with the OLT through the re-bound channel.

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

Wherein, performing data transmission with the OLT through the re-bound channel includes:

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

According to the equalization delay corresponding to each re-bound channel, each sub-packet is transmitted through each of the bound channels respectively.

Embodiments of the present invention further provide an optical line terminal OLT, including a memory, a processor, and a computer program stored on the memory and running on the processor, when the computer program is executed by the processor A method for implementing channel adaptation in a PON performed by any one of the above-mentioned OLTs is implemented.

Embodiments of the present invention further provide an optical network unit ONU, including a memory, a processor, and a computer program stored on the memory and running on the processor, when the computer program is executed by the processor A method for implementing channel adaptation in the PON performed by any one of the above ONUs is implemented.

An embodiment of the present invention further provides a system for realizing channel adaptation in a PON, including the optical line terminal OLT described in any of the above and the optical network unit ONU described in any of the above.

Embodiments of the present invention further provide a computer-readable storage medium, where an information processing program is stored on the computer-readable storage medium, and when the information processing program is executed by a processor, implements any one of the above-mentioned implementation channels in the PON The steps of the adaptive method.

Those of ordinary skill in the art can understand that all or some of the steps in the methods disclosed above, functional modules/units in the systems, and devices can be implemented as software, firmware, hardware, and appropriate combinations thereof. In a hardware implementation, the division between 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 components Components execute cooperatively. Some or all of the 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 known to those of ordinary skill in the art, the term computer storage media includes both volatile and nonvolatile implemented in any method or technology for storage of information, such as computer readable instructions, data structures, program modules or other data flexible, removable and non-removable media. Computer storage media include, but are not limited to, RAM, ROM, EEPROM, flash memory or other memory technology, 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 which can be accessed by a computer. In addition, communication media typically embodies computer readable instructions, data structures, program modules, or other data in a modulated data signal such as a carrier wave or other transport mechanism, and can include any information delivery media, as is well known to those of ordinary skill in the art .

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

Claims (22)

1. A method for realizing channel adaptation in a PON, comprising: In the process of 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 the channel registration. 2. The method according to claim 1, wherein before notifying the ONU to restart the channel registration, the method further comprises: Determine whether the bandwidth of the ONU is sufficient; If not enough, the ONU is notified to restart the channel registration. 3. method according to claim 1, is characterized in that, before carrying out data transmission, described OLT and described ONU carry out channel registration, comprising: The connected state of all channels supported by the OLT detection and the ONU; Binding the channel in the connected state in all channels with the ONU; Data transmission is performed with the ONU through the bound channel. 4. method according to claim 3, is characterized in that, described OLT detects the connection state of all channels and ONU that support, comprises: The OLT interacts with the ONU on each of the all channels to send physical layer operation management and maintenance ploam messages to perform channel registration, respectively, 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 all channels, it is considered that the at least one channel is in a disconnected state, and other channels can receive The channel of the ploam response message sent by the ONU is in a connected state. 5. The method according to claim 4, wherein the ploam response message comprises one of the following: Sequence number SN response message, ranging response message. 6. The method according to claim 3, wherein the method further comprises: In the process of data transmission, if at least one of the bound channels fails, the ONU disconnects and restarts the channel registration. 7. The method according to claim 1 or 6, wherein the restarting the channel registration comprises: The OLT interacts with the ONU on each of the all channels to send physical layer operation management and maintenance ploam messages respectively to re-register the channel, 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 all channels, it is considered that the at least one channel is in a disconnected state, and other channels can be The channel receiving the ploam response message sent by the ONU is in a connected state; Re-binding the channel in the connected state in the all channels with the ONU; Data transmission is performed with the ONU through the re-bound channel. 8. The method according to claim 1, 3 or 6, characterized in that, in the process of channel registration or the process of re-registering the channel, each channel in the all channels is independently measured. distance, each channel corresponds to its own equalization delay. 9. A method for realizing channel adaptation in a PON, comprising: The ONU of the optical network unit receives the notification of restarting the channel registration sent by the OLT; The ONU chooses to drop the line during the idle period of data transmission and restart the channel registration. 10. The method according to claim 9, wherein before the ONU receives the notification of restarting the channel registration sent by the OLT, the ONU and the OLT perform channel registration, comprising: The ONU interacts with the optical line terminal OLT on each of all the supported channels to send physical layer operation management and maintenance ploam messages respectively to register the channels, so that the OLT connects the channels in the connected state among the all channels with the ONU binding; Data transmission is performed with the OLT through the bound channel. 11. The method of claim 10, wherein: In the process of the channel registration, the ranging is independently measured for each channel in the all channels, and the equalization delay corresponding to each bound channel sent by the OLT is received. 12. The method according to claim 10, wherein the data transmission with the OLT through the bound channel comprises: Divide each first data packet to be sent into a first quantity of sub-packets, where the first quantity is the number of the bound channels; According to the equalization delay corresponding to each of the bound channels, each sub-packet is transmitted through each of the bound channels respectively. 13. The method according to claim 10, wherein the method further comprises: in the process of performing the data transmission, if at least one of the bound channels fails, the ONU is disconnected Restart channel registration. 14. The method according to claim 9 or 13, wherein the restarting the channel registration comprises: The ONU interacts with the OLT on each of the all channels to send physical layer operation management and maintenance ploam messages to re-register the channel, so that the OLT re-registers the channel in the connected state among the all channels. Bind with the ONU; Data transmission is performed with the OLT through the re-bound channel. 15 . The method according to claim 14 , wherein, in the process of re-registering the channels, ranging is independently measured for each channel in the all channels, and each channel corresponds to its own equalization delay. 16 . Time. 16. The method of claim 15, wherein: The performing data transmission with the OLT through the re-bound channel includes: Divide each second data packet to be sent into a second quantity of sub-packets, where the second quantity is the number of the re-bound channels; According to the equalization delay corresponding to each re-bound channel, each sub-packet is transmitted through each of the bound channels respectively. 17. A device for realizing channel adaptation in a PON, comprising: The discovery unit is used to find out whether the serial number SN of the new ONU is the same as the serial number of the already registered ONU in the process of data transmission; The notification unit is configured to notify the ONU to restart the channel registration when it is found that the serial number SN of the new ONU is the same as the serial number of the already registered ONU. 18. A device for realizing channel adaptation in a PON, comprising: a receiving unit, configured to receive the notification of restarting the channel registration sent by the OLT; The registration unit is used to drop the line during the idle period of data transmission and restart the channel registration. 19. An optical line terminal OLT, characterized in that it comprises a memory, a processor and a computer program stored on the memory and running on the processor, and the computer program is implemented when executed by the processor The method for realizing channel adaptation in a PON according to any one of claims 1 to 8. 20. An optical network unit ONU, characterized in that, comprising a memory, a processor and a computer program stored on the memory and running on the processor, the computer program being implemented when the processor is executed The method for realizing channel adaptation in a PON according to any one of claims 9 to 16. 21. A system for realizing channel adaptation in a PON, comprising the optical line terminal OLT of claim 19 and the optical network unit ONU of claim 20. 22. A computer-readable storage medium, wherein an information processing program is stored on the computer-readable storage medium, and when the information processing program is executed by a processor, the information processing program as claimed in any one of claims 1 to 16 is implemented. Describe the steps of the method for implementing channel adaptation in the PON.

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