Optical network unit registration and online method, device and storage medium

Abstract

The present invention discloses an optical network unit registration and online method, device, and storage medium, comprising: an optical network unit (ONU) initiating a registration and online process to an optical network terminal (OLT) using a second light source, the power of the second light source being lower than the power of a first light source, the first light source being the light source used by the ONU when transmitting optical signals in a PON; the ONU responding to a request sent by the OLT during the registration and online process, the response being sent using the second light source; the OLT receiving information sent by the ONU to the OLT during the registration and online process using a second filter, the light intensity of the optical signal received by the second filter being lower than the light intensity of the optical signal received by the first filter, the first filter being the filter used by the OLT when receiving optical signals in the PON; and the ONU completing the registration and online process after setting a compensation delay to align with a time slot based on the received message. The present invention can avoid the delay problem caused by registration windowing without additional wavelength planning, thereby improving the guarantee capability of low-latency services.

Description

Technical Field

[0001] The present invention relates to the technical field of wireless communications, and in particular to an optical network unit registration and online method, device and storage medium. Background Art

[0002] In current access networks, the ONU (Optical Network Unit) registration process is based on a data transmission channel. The OLT (Optical Line Terminal) transmits operating parameters to the ONU, measures the logical distance between the OLT and each ONU, and determines the downstream and upstream communication channels. Measuring the logical distance between the OLT and each ONU is called ranging.

[0003] The disadvantage of the existing technology is that the existing ranging process will cause delays to the ONUs on the network. Summary of the Invention

[0004] The present invention provides an optical network unit registration and online method, a device and a storage medium, which are used to solve the problem that all online ONUs will have a delay effect caused by a ranging process.

[0005] The present invention provides the following technical solutions:

[0006] An ONU registration and online method, comprising:

[0007] The ONU uses a second light source to initiate a registration and online process with the OLT, wherein the power of the second light source is lower than the power of the first light source, and the first light source is the light source used by the ONU when transmitting optical signals in the PON;

[0008] The ONU responds to the request sent by the OLT in the registration and online process, wherein the response is sent using the second light source;

[0009] The ONU sets the compensation delay according to the received message to align with the time slot and completes the registration and online process.

[0010] During implementation, it further includes:

[0011] After sending the request, if no response is received from the OLT, the power of the second light source is adjusted and the request is resent.

[0012] In implementation, the power of the second light source is adjusted through a PL mechanism.

[0013] During implementation, it further includes:

[0014] After sending the request, if the time slot cannot be aligned, the ONU uses the second light source to initiate a registration and online process to the OLT until the time slot is aligned according to the received instruction.

[0015] During implementation, it further includes:

[0016] The ONU uses a second light source to initiate a registration and online process to the OLT, wherein the second light source sends the signals required to be sent in the registration and online process at a second speed. The second speed is the number of signals sent in the same time that is lower than the number of signals sent at the first speed. The first speed is the number of signals sent by the ONU when transmitting optical signals in the PON.

[0017] In implementation, the response includes one or a combination of the following responses:

[0018] Serial number response, Ranging response, PWD response.

[0019] During implementation, after completing the registration and on-line process, it further includes:

[0020] ONU uses the first light source to initiate the registration and online process to OLT;

[0021] The ONU responds to the request sent by the OLT in the registration and online process, wherein the response is sent using the first light source;

[0022] The ONU sets the compensation delay according to the received message to align with the time slot and completes the registration and online process.

[0023] An ONU registration and online method, comprising:

[0024] The OLT receives, through a second filter, information sent by the ONU using a second light source to the OLT in a registration and online process, wherein the power of the second light source is lower than the power of the first light source, the first light source is a light source used by the ONU when transmitting optical signals in the PON, the light intensity of the optical signal received by the second filter is weaker than the light intensity of the optical signal received by the first filter, and the first filter is a filter used by the OLT when receiving optical signals in the PON;

[0025] The OLT responds to the ONU according to the ONU registration and online process requirements.

[0026] During implementation, it further includes:

[0027] Instructions are sent according to different preset compensation delays to align the ONU with the time slot.

[0028] During implementation, it further includes:

[0029] The OLT receives, through a second filter, information sent by the ONU using a second light source to the OLT in a registration and online process. The second filter receives signals required to be received in the registration and online process at a second speed. The second speed is a number of signals received within the same time period that is lower than the number at the first speed. The first speed is the number of signals received when the ONU transmits optical signals in the PON.

[0030] In implementation, the message to be responded to by the ONU includes one or a combination of the following messages:

[0031] Serial number request, serial number response, Ranging request, Ranging response, Ranging time, PWD request, PWD response.

[0032] During implementation, after the ONU completes the registration and online process, it further includes:

[0033] The OLT receives, through the first filter, information sent by the ONU to the OLT using the first light source during the registration and online process;

[0034] The OLT responds to the ONU according to the ONU registration and online process requirements.

[0035] An ONU, comprising:

[0036] The processor reads the program from the memory and performs the following steps:

[0037] Initiate a registration and online process with the OLT using a second light source, wherein the power of the second light source is lower than the power of the first light source, and the first light source is the light source used by the ONU when transmitting optical signals in the PON;

[0038] Responding to a request sent by the OLT in the registration and online process, wherein the response is sent using a second light source;

[0039] Set the compensation delay according to the received message and align with the time slot to complete the registration and online process;

[0040] A transceiver is used to receive and send data under the control of the processor.

[0041] During implementation, it further includes:

[0042] After sending the request, if no response is received from the OLT, the power of the second light source is adjusted and the request is resent.

[0043] In implementation, the power of the second light source is adjusted through a PL mechanism.

[0044] During implementation, it further includes:

[0045] After sending the request, if the time slot cannot be aligned, the ONU uses the second light source to initiate a registration and online process to the OLT until the time slot is aligned according to the received instruction.

[0046] During implementation, it further includes:

[0047] The ONU uses a second light source to initiate a registration and online process to the OLT, wherein the second light source sends the signals required to be sent in the registration and online process at a second speed. The second speed is the number of signals sent in the same time that is lower than the number of signals sent at the first speed. The first speed is the number of signals sent by the ONU when transmitting optical signals in the PON.

[0048] In implementation, the response includes one or a combination of the following responses:

[0049] Serial number response, Ranging response, PWD response.

[0050] During implementation, after completing the registration and on-line process, it further includes:

[0051] Use the first light source to initiate the registration and online process to the OLT;

[0052] Responding to a request sent by the OLT in the registration and online process, wherein the response is sent by the first light source;

[0053] Set the compensation delay according to the received message to align with the time slot and complete the registration and online process.

[0054] An ONU, comprising:

[0055] An ONU registration module is configured to initiate a registration and online process to the OLT using a second light source, wherein the power of the second light source is lower than the power of the first light source, and the first light source is a light source used by the ONU when transmitting optical signals in the PON;

[0056] An ONU response module is configured to respond to a request sent by the OLT in the registration and online process, wherein the response is sent using a second light source;

[0057] The ONU online module is used to set the compensation delay according to the received message to align the time slot and complete the registration and online process.

[0058] During implementation, it further includes:

[0059] The ONU power module is used to adjust the power of the second light source and resend the request when no response is received from the OLT after the request is sent.

[0060] During implementation, the ONU power module is further configured to adjust the power of the second light source through a PL mechanism.

[0061] In implementation, the ONU registration module is further configured to, after sending a request, initiate a registration and online process to the OLT using a second light source when the time slot cannot be aligned until the time slot is aligned according to the received instruction.

[0062] During implementation, the ONU registration module is further used to initiate a registration and online process to the OLT using a second light source, wherein the second light source sends the signal that needs to be sent in the registration and online process at a second speed, and the second speed is the number of signals sent in the same time that is lower than the number of the first speed, and the first speed is the number of signals sent when the ONU transmits optical signals in the PON.

[0063] In implementation, the ONU response module is further configured to respond to one or a combination of the following responses:

[0064] Serial number response, Ranging response, PWD response.

[0065] During implementation, the ONU registration module is further configured to initiate a registration and online process to the OLT using the first light source after completing the registration and online process;

[0066] The ONU response module is further configured to respond to a request sent by the OLT in the registration and online process, wherein the response is sent using the first light source;

[0067] The ONU online module is further configured to set a compensation delay according to the received message to align with the time slot and complete the registration and online process.

[0068] An OLT, including:

[0069] The processor reads the program from the memory and performs the following steps:

[0070] Receiving, through a second filter, information sent by the ONU to the OLT in a registration and online process using a second light source, wherein the power of the second light source is lower than the power of the first light source, the first light source is a light source used by the ONU when transmitting an optical signal in the PON, the light intensity of the optical signal received by the second filter is weaker than the light intensity of the optical signal received by the first filter, and the first filter is a filter used by the OLT when receiving the optical signal in the PON;

[0071] Respond to the ONU according to the ONU registration and online process requirements;

[0072] A transceiver is used to receive and send data under the control of the processor.

[0073] During implementation, it further includes:

[0074] Instructions are sent according to different preset compensation delays to align the ONU with the time slot.

[0075] During implementation, it further includes:

[0076] The OLT receives, through a second filter, information sent by the ONU using a second light source to the OLT in a registration and online process. The second filter receives signals required to be received in the registration and online process at a second speed. The second speed is a number of signals received within the same time period that is lower than the number at the first speed. The first speed is the number of signals received when the ONU transmits optical signals in the PON.

[0077] In implementation, the message to be responded to by the ONU includes one or a combination of the following messages:

[0078] Serial number request, serial number response, Ranging request, Ranging response, Ranging time, PWD request, PWD response.

[0079] During implementation, after the ONU completes the registration and online process, it further includes:

[0080] Receiving, through the first filter, information sent by the ONU to the OLT using the first light source in a registration and online process;

[0081] Respond to the ONU according to the ONU registration and online process requirements.

[0082] An OLT, including:

[0083] An OLT receiving module is configured to receive, through a second filter, information sent by the ONU to the OLT using a second light source in a registration and online process, wherein the power of the second light source is lower than the power of the first light source, the first light source is a light source used by the ONU when transmitting an optical signal in the PON, the light intensity of the optical signal received by the second filter is weaker than the light intensity of the optical signal received by the first filter, and the first filter is a filter used by the OLT when receiving an optical signal in the PON;

[0084] The OLT response module is used to respond to the ONU according to the ONU registration and online process requirements.

[0085] During implementation, the OLT response module is further configured to send instructions according to different preset compensation delays to enable the ONU to align with the time slot.

[0086] During implementation, the OLT receiving module is further used to receive, through a second filter, information sent by the ONU using a second light source to the OLT in a registration and online process, wherein the second filter receives signals that need to be received in the registration and online process at a second speed, and the second speed is the number of signals received in the same time that is lower than the number of signals received at the first speed, and the first speed is the number of signals received when the ONU transmits optical signals in the PON.

[0087] In implementation, the OLT response module is further configured to respond to the ONU in response to one or a combination of the following messages:

[0088] Serial number request, serial number response, Ranging request, Ranging response, Ranging time, PWD request, PWD response.

[0089] During implementation, after the ONU completes the registration and online process, it further includes:

[0090] The OLT receiving module is further configured to receive, through the first filter, information sent by the ONU to the OLT using the first light source in the registration and online process;

[0091] The OLT response module is further used to respond to the ONU according to the ONU registration and online process requirements.

[0092] A computer-readable storage medium stores a computer program for executing the above-mentioned ONU and / or OLT side ONU registration and online method.

[0093] The beneficial effects of the present invention are as follows:

[0094] In the technical solution provided by the embodiments of the present invention, the ONU uses a low-power second light source to initiate the registration and online process with the OLT and respond to requests issued by the OLT during the registration and online process. The OLT then uses a second filter capable of processing weak optical signals to respond to the ONU according to the requirements of the ONU registration and online process, enabling the ONU to complete registration and online. Because the light source used by the ONU to transmit optical signals in the PON and the filter used by the OLT to receive optical signals in the PON are not used, ONU registration can be achieved without windowing. This avoids the latency caused by registration windowing without additional wavelength planning, thereby improving the ability to ensure low-latency services.

[0095] Furthermore, after the ranging phase (the first ranging phase) is completed, since the weak optical signal is based on low-speed signal communication, the ranging result can support the normal communication of the ONU, but the accuracy is low. Therefore, after the ONU goes online, it can be authenticated and the second ranging phase can be performed again to finally go online. BRIEF DESCRIPTION OF THE DRAWINGS

[0096] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0097] Figure 1 Schematic diagram of the ONU online registration and ranging process in an embodiment of the present invention;

[0098] Figure 2 Schematic diagram of the implementation process of the registration and online method on the ONU side in an embodiment of the present invention;

[0099] Figure 3 Schematic diagram of the implementation process of the registration and online method on the OLT side in an embodiment of the present invention;

[0100] Figure 4 Schematic diagram of the OLT and ONU structure in the embodiment of the present invention Figure 1 ;

[0101] Figure 5 Schematic diagram of the OLT and ONU structure in the embodiment of the present invention Figure 2 ;

[0102] Figure 6 Schematic diagram of the ONU registration and online process in an embodiment of the present invention;

[0103] Figure 7 This is a schematic diagram of the ONU structure in an embodiment of the present invention;

[0104] Figure 8 FIG. 1 is a schematic diagram of the OLT structure in an embodiment of the present invention. DETAILED DESCRIPTION

[0105] During the course of the invention, the inventors noticed that:

[0106] Figure 1 The figure shows the ONU online registration and ranging process. This process uses an in-band method to measure the transmission delay of each newly online ONU to implement online registration.

[0107] When a new ONU comes online and registers, it cannot interact with existing ONUs simultaneously because it has not yet undergone ranging. Therefore, a dedicated period of time must be reserved for its online registration. Therefore, in GPON networks, the OLT and ONU interaction process regularly reserves a certain amount of time for the registration process of newly online ONUs. During this period, all operating ONUs must temporarily delay transmission. This reserved time is equivalent to opening a registration and ranging window on the data transmission channel. This registration and ranging window is related to the distance of the newly added ONU to the system and is typically around 250µs, which will cause a delay for existing ONUs.

[0108] In current access networks, when each new ONU registers and goes online, all connected ONUs must temporarily delay transmission to open a registration window of approximately 250µs, resulting in latency for all active ONUs. In dual-gigabit networks, PON (Passive Optical Network) access networks must meet the ultra-low latency requirements of frequently interacting services such as cloud VR (Virtual Reality), and will also be used in 5G backhaul networks. This places high demands on PON network latency. Addressing the windowing delay caused by the ONU onboarding process is one of the key ways to reduce latency.

[0109] In this embodiment, a registration and onboarding solution is proposed that avoids windowing operations and eliminates the impact of windowing delays on existing networks. This solution adds a low-speed, low-power light source to the ONU and a low-pass filter to the OLT. By adjusting the power of the low-speed signal and compensating for delays, it initially achieves time slot alignment. Subsequent registration and ranging processes are then completed based on this signal, achieving a registration and onboarding solution with no windowing delays.

[0110] The specific embodiments of the present invention will be described below with reference to the accompanying drawings.

[0111] The following description will focus on the implementation of the ONU and OLT, followed by an example of their coordinated implementation to better understand the implementation of the solutions provided in the embodiments of the present invention. This description does not necessarily imply that the ONU and OLT must be implemented in coordination or independently. In fact, when implemented separately, the ONU and OLT each solve their own problems, but when used in combination, they achieve even better technical results.

[0112] Figure 2 The following is a flowchart of the registration and online method implementation on the ONU side, as shown in the figure, including:

[0113] Step 201: The ONU initiates a registration and online process to the OLT using a second light source, wherein the power of the second light source is lower than the power of the first light source, and the first light source is the light source used by the ONU to transmit optical signals in the PON;

[0114] Step 202: The ONU responds to the request sent by the OLT in the registration and online process, wherein the response is sent using the second light source;

[0115] Step 203: The ONU sets the compensation delay to align with the time slot according to the received message and completes the registration and online process.

[0116] During implementation, considering that the OLT may not receive the message sent by the ONU, the following steps may be further included:

[0117] After sending the request, if no response is received from the OLT, the power of the second light source is adjusted and the request is resent.

[0118] In a specific implementation, the power of the second light source is adjusted through a PL mechanism.

[0119] Figure 3 The following is a flowchart of the registration and online method implementation on the OLT side, as shown in the figure, including:

[0120] Step 301: The OLT receives, through a second filter, information sent by the ONU using a second light source to the OLT during a registration and online process, wherein the power of the second light source is lower than the power of the first light source, which is used by the ONU to transmit optical signals in the PON. The intensity of the optical signal received by the second filter is weaker than the intensity of the optical signal received by the first filter, which is used by the OLT to receive optical signals in the PON.

[0121] Step 302: The OLT responds to the ONU according to the ONU registration and online process requirements.

[0122] After the ranging phase (first ranging) is completed, since weak optical signals are based on low-speed signal communication, the ranging results can support normal communication of the ONU, but the accuracy is low. Therefore, after the ONU goes online, it can undergo authentication and secondary ranging phases again to finally go online. In other words:

[0123] During implementation, the following may be further included:

[0124] The ONU uses a second light source to initiate a registration and online process to the OLT, wherein the second light source sends the signals required to be sent in the registration and online process at a second speed. The second speed is the number of signals sent in the same time that is lower than the number of signals sent at the first speed. The first speed is the number of signals sent by the ONU when transmitting optical signals in the PON.

[0125] Correspondingly, for OLT, it further includes:

[0126] The OLT receives, through a second filter, information sent by the ONU using a second light source to the OLT in a registration and online process. The second filter receives signals required to be received in the registration and online process at a second speed. The second speed is a number of signals received within the same time period that is lower than the number at the first speed. The first speed is the number of signals received when the ONU transmits optical signals in the PON.

[0127] The low speed in the embodiment refers to the number of signals transmitted in the same period of time. The smaller the number, the lower the speed, and vice versa. The purpose of using a low-speed signal for the second light source is to save costs.

[0128] During implementation, after completing the registration and on-line process, it may further include:

[0129] ONU uses the first light source to initiate the registration and online process to OLT;

[0130] The ONU responds to the request sent by the OLT in the registration and online process, wherein the response is sent using the first light source;

[0131] The ONU sets the compensation delay according to the received message to align with the time slot and completes the registration and online process.

[0132] Correspondingly, on the OLT side, after the ONU completes the registration and online process, it further includes:

[0133] The OLT receives, through the first filter, information sent by the ONU to the OLT using the first light source during the registration and online process;

[0134] The OLT responds to the ONU according to the ONU registration and online process requirements.

[0135] The following will use an existing ONU registration and online example for illustration. The existing ONU registration and online example is used in the implementation because it is currently in use, so it is taken as an example here; however, theoretically, using a low-power light source to complete the first registration and online can also be used in other ONU registration and online. The existing ONU registration and online example is only used to teach those skilled in the art how to implement the present invention specifically, but does not mean that it can only be used in the existing ONU registration and online example. During implementation, the corresponding process method can be determined in combination with practical needs.

[0136] First, a brief description of the existing ONU registration and online.

[0137] a) Initial-state (O1): The OLT sends a message to the ONU to start the ONU, and the ONU enters the ready state.

[0138] b) Standby-state (O2): The ONU receives the message, extracts parameters from the message, including the delimiter value, power level, pre-allocation compensation delay, etc., and adjusts its own configuration accordingly to match subsequent information exchanges.

[0139] c) Serial-Number-state (O3): The OLT sends a serial number request to the ONU; the ONU responds to the OLT's serial number request; after receiving the ONU's serial number response message, the OLT assigns a temporary ONU ID (ONU identifier) ​​to the ONU.

[0140] d) Ranging-state (O4): The OLT sends a ranging request to the ONU. After receiving the ranging request from the OLT, the ONU responds with a message containing its own SN (Sequence Number) and ONU ID. The OLT calculates the ONU's compensation delay and sends a message to the ONU. After receiving the message, the ONU sets the compensation delay.

[0141] e) Operation-state (O5): The OLT sends a password request to the ONU, and the ONU responds with the password. This password is not configured on the OLT. If the OLT's PON has auto-discovery enabled, an ONU auto-discovery alarm is reported to the host command line or network management system. The ONU will come online normally only after confirmation.

[0142] That is, in implementation, for the ONU, the response includes one or a combination of the following responses:

[0143] Serial number response, Ranging response, PWD response.

[0144] For the OLT, the message sent to the ONU in response to the OLT includes one or a combination of the following messages:

[0145] Serial number request, serial number response, Ranging request, Ranging response, Ranging time, PWD (password data) request, PWD response.

[0146] Among them, after the operation state Operation-state (O5), the OLT will interact with the ONU involving requests and responses such as passwords and data, so they are named PWD request and PWD response, but technical personnel in this field should be able to correspond them to similar request responses in different registration and online processes and different stages, or request responses with similar functions.

[0147] Figure 4 Schematic diagram of the OLT and ONU structure Figure 1 As shown in the figure, in addition to the conventional Optics 1 processing module, the OLT includes a filter and a corresponding Optics 2 processing module. In addition to the signal transmission module, the ONU also has a low-power light source. The low-power light source is also known as the second light source.

[0148] In PON network interaction, information transmitted from the OLT to the ONU is called downstream information, and information transmitted from the ONU to the OLT is called upstream information. Both upstream and downstream information require planning channels with different wavelengths. In implementation, a low-speed weak light source is added in the upstream direction and superimposed on the original upstream channel. Therefore, the ONU side needs to add a weak light source and related processing modules, and the OLT side needs a weak light filter, receiving optical module and corresponding processing units. The basic process can be as follows:

[0149] 1. The original upstream optical OLT receiving sensitivity is required to be above -X, and a low-speed (100MHz) low-power light source is added to send registration and online information;

[0150] 2. The OLT side receives low-speed information through a filter. The low-speed, low-power light source requires the received optical power to be between -Y1 and -Y2, ​​which is less than the signal light.

[0151] 3. If the ONU does not receive a response after sending a registration message, it adjusts the transmit power through the PL (power leveling) mechanism.

[0152] 4. After receiving the weak optical signal, the OLT sends a command to poll different compensation delays nT / 16 to ensure alignment with the time slot T; that is:

[0153] During implementation, the following may be further included:

[0154] After sending the request, if the time slot cannot be aligned, the ONU uses the second light source to initiate a registration and online process to the OLT until the time slot is aligned according to the received instruction.

[0155] For OLT, it can further include:

[0156] Instructions are sent according to different preset compensation delays to align the ONU with the time slot.

[0157] Specifically, after the OLT receives the signal initiated by the ONU, the returned signal instruction may not be able to align the ONU with the time slot because it cannot interpret it. Therefore, the OLT can send signals according to different preset compensation delays, such as nT / 16, until the ONU correctly interprets it and aligns it with the time slot. Taking nT / 16 as an example, usually 16 rounds are enough for the ONU to correctly interpret the signal.

[0158] 5. Complete the registration and onboarding process after the time slot is aligned.

[0159] Figure 5 Schematic diagram of the OLT and ONU structure Figure 2 As shown in the figure, based on the above process, a block diagram of a transceiver instance is as follows Figure 5 shown.

[0160] For the ONU, after being processed by a low-speed encoder, a delay device, a mapper, etc., it is sent to the OLT through a DAC (Digital Analog Converter), a Laser (laser), and an optical fiber ATT (Attenuation).

[0161] For the OLT, after receiving the data, the photodetector APD (avalanche photodiode) / PIN (positive-intrinsic-negative) undergoes low-pass filtering and logical subtraction processing, and finally performs time slot alignment.

[0162] Figure 6 The ONU registration and online process is shown in the figure, which mainly includes:

[0163] Initial-state (O1): The ONU has just been powered on.

[0164] Standby-state (O2): The ONU has received downstream light via the downstream wavelength and is waiting to receive parameters. The OLT sends an Upstream_Overhead message to the ONU.

[0165] Serial-Number-state (O3): In this state, the ONU reports its serial number. If the ONU receives no response to its registration message, it adjusts its transmit power through the PL mechanism and retransmits. The OLT then modulates the information slot with a compensation delay command, aligning it with the received ONU's SN. (ONUs report their SNs using a random delay.)

[0166] The OLT assigns an OUN ID to the OUN;

[0167] Ranging-state (O4): In this phase, the ONU returns a SN so that the OLT can complete ranging. The OLT then measures the ONU's RTD (Round-Trip-Delay).

[0168] The OLT notifies the ONU of EqD (equalized delay);

[0169] Operation-state (O5): The normal working state of the ONU. The ONU records the EqD and calculates the upstream data sending window based on the EqD value and BW MAP (bandwidth mapping).

[0170] like Figure 6In the registration process shown, the ONU's upstream SN response message, the SN response message resent after delayed polling, and the ranging response (ranging response) are based on weak optical signals, while the OLT's downstream information is based on the existing downstream channel. After the ranging phase (the first ranging phase) is completed, since weak optical signals rely on low-speed communication, the ranging result can support normal ONU communication, but with low accuracy. Therefore, after the ONU goes online, it undergoes authentication and a secondary ranging phase, ultimately achieving online access.

[0171] Based on the same inventive concept, an ONU, an OLT, and a computer-readable storage medium are also provided in an embodiment of the present invention. Since the principles of solving the problems by these devices are similar to those of the ONU registration and online method, the implementation of these devices can refer to the implementation of the method, and the repeated parts will not be repeated.

[0172] When implementing the technical solution provided by the embodiment of the present invention, it can be implemented as follows.

[0173] Figure 7 The following is a schematic diagram of the ONU structure. As shown in the figure, the ONU includes:

[0174] The processor 700 is configured to read the program in the memory 720 and execute the following process:

[0175] Initiate a registration and online process with the OLT using a second light source, wherein the power of the second light source is lower than the power of the first light source, and the first light source is the light source used by the ONU when transmitting optical signals in the PON;

[0176] Responding to a request sent by the OLT in the registration and online process, wherein the response is sent using a second light source;

[0177] Set the compensation delay according to the received message and align with the time slot to complete the registration and online process;

[0178] The transceiver 710 is configured to receive and send data under the control of the processor 700 .

[0179] During implementation, it further includes:

[0180] After sending the request, if no response is received from the OLT, the power of the second light source is adjusted and the request is resent.

[0181] In implementation, the power of the second light source is adjusted through a PL mechanism.

[0182] During implementation, it further includes:

[0183] After sending the request, if the time slot cannot be aligned, the ONU uses the second light source to initiate a registration and online process to the OLT until the time slot is aligned according to the received instruction.

[0184] During implementation, it further includes:

[0185] The ONU uses a second light source to initiate a registration and online process to the OLT, wherein the second light source sends the signals required to be sent in the registration and online process at a second speed. The second speed is the number of signals sent in the same time that is lower than the number of signals sent at the first speed. The first speed is the number of signals sent by the ONU when transmitting optical signals in the PON.

[0186] In implementation, the response includes one or a combination of the following responses:

[0187] Serial number response, Ranging response, PWD response.

[0188] During implementation, after completing the registration and on-line process, it further includes:

[0189] Use the first light source to initiate the registration and online process to the OLT;

[0190] Responding to a request sent by the OLT in the registration and online process, wherein the response is sent by the first light source;

[0191] Set the compensation delay according to the received message to align with the time slot and complete the registration and online process.

[0192] Among them, Figure 7 In the embodiment, the bus architecture may include any number of interconnected buses and bridges, specifically linking together various circuits of one or more processors represented by processor 700 and memory represented by memory 720. The bus architecture may also link together various other circuits such as peripheral devices, voltage regulators, and power management circuits, which are all well known in the art and, therefore, will not be described further herein. The bus interface provides an interface. The transceiver 710 may be a plurality of components, i.e., a transmitter and a receiver, providing a unit for communicating with various other devices on a transmission medium. The processor 700 is responsible for managing the bus architecture and general processing, and the memory 720 may store data used by the processor 700 when performing operations.

[0193] An embodiment of the present invention further provides an ONU, including:

[0194] An ONU registration module is configured to initiate a registration and online process to the OLT using a second light source, wherein the power of the second light source is lower than the power of the first light source, and the first light source is a light source used by the ONU when transmitting optical signals in the PON;

[0195] An ONU response module is configured to respond to a request sent by the OLT in the registration and online process, wherein the response is sent using a second light source;

[0196] The ONU online module is used to set the compensation delay according to the received message to align the time slot and complete the registration and online process.

[0197] During implementation, it further includes:

[0198] The ONU power module is used to adjust the power of the second light source and resend the request when no response is received from the OLT after the request is sent.

[0199] During implementation, the ONU power module is further configured to adjust the power of the second light source through a PL mechanism.

[0200] In implementation, the ONU registration module is further configured to, after sending a request, initiate a registration and online process to the OLT using a second light source when the time slot cannot be aligned until the time slot is aligned according to the received instruction.

[0201] During implementation, the ONU registration module is further used to initiate a registration and online process to the OLT using a second light source, wherein the second light source sends the signal that needs to be sent in the registration and online process at a second speed, and the second speed is the number of signals sent in the same time that is lower than the number of the first speed, and the first speed is the number of signals sent when the ONU transmits optical signals in the PON.

[0202] In implementation, the ONU response module is further configured to respond to one or a combination of the following responses:

[0203] Serial number response, Ranging response, PWD response.

[0204] During implementation, the ONU registration module is further configured to initiate a registration and online process to the OLT using the first light source after completing the registration and online process;

[0205] The ONU response module is further configured to respond to a request sent by the OLT in the registration and online process, wherein the response is sent using the first light source;

[0206] The ONU online module is further configured to set a compensation delay according to the received message to align with the time slot and complete the registration and online process.

[0207] For the convenience of description, the various parts of the above-mentioned device are divided into various modules or units according to their functions and described separately. Of course, when implementing the present invention, the functions of each module or unit can be realized in the same or multiple software or hardware.

[0208] Figure 8 The following is a schematic diagram of the OLT structure. As shown in the figure, the OLT includes:

[0209] The processor 800 is configured to read the program in the memory 820 and execute the following process:

[0210] Receiving, through a second filter, information sent by the ONU to the OLT in a registration and online process using a second light source, wherein the power of the second light source is lower than the power of the first light source, the first light source is a light source used by the ONU when transmitting an optical signal in the PON, the light intensity of the optical signal received by the second filter is weaker than the light intensity of the optical signal received by the first filter, and the first filter is a filter used by the OLT when receiving the optical signal in the PON;

[0211] Respond to the ONU according to the ONU registration and online process requirements;

[0212] The transceiver 810 is configured to receive and send data under the control of the processor 800 .

[0213] During implementation, it further includes:

[0214] Instructions are sent according to different preset compensation delays to align the ONU with the time slot.

[0215] During implementation, it further includes:

[0216] The OLT receives, through a second filter, information sent by the ONU using a second light source to the OLT in a registration and online process. The second filter receives signals required to be received in the registration and online process at a second speed. The second speed is a number of signals received within the same time period that is lower than the number at the first speed. The first speed is the number of signals received when the ONU transmits optical signals in the PON.

[0217] In implementation, the message to be responded to by the ONU includes one or a combination of the following messages:

[0218] Serial number request, serial number response, Ranging request, Ranging response, Ranging time, PWD request, PWD response.

[0219] During implementation, after the ONU completes the registration and online process, it further includes:

[0220] Receiving, through the first filter, information sent by the ONU to the OLT using the first light source in a registration and online process;

[0221] Respond to the ONU according to the ONU registration and online process requirements.

[0222] Among them, Figure 8In the embodiment, the bus architecture may include any number of interconnected buses and bridges, specifically linking together various circuits of one or more processors represented by processor 800 and memory represented by memory 820. The bus architecture may also link together various other circuits such as peripheral devices, voltage regulators, and power management circuits, which are all well known in the art and, therefore, will not be described further herein. The bus interface provides an interface. The transceiver 810 may be a plurality of components, i.e., a transmitter and a receiver, providing a unit for communicating with various other devices on a transmission medium. The processor 800 is responsible for managing the bus architecture and general processing, and the memory 820 may store data used by the processor 800 when performing operations.

[0223] An embodiment of the present invention further provides an OLT, including:

[0224] An OLT receiving module is configured to receive, through a second filter, information sent by the ONU to the OLT using a second light source in a registration and online process, wherein the power of the second light source is lower than the power of the first light source, the first light source is a light source used by the ONU when transmitting an optical signal in the PON, the light intensity of the optical signal received by the second filter is weaker than the light intensity of the optical signal received by the first filter, and the first filter is a filter used by the OLT when receiving an optical signal in the PON;

[0225] The OLT response module is used to respond to the ONU according to the ONU registration and online process requirements.

[0226] During implementation, the OLT response module is further configured to send instructions according to different preset compensation delays to enable the ONU to align with the time slot.

[0227] During implementation, the OLT receiving module is further used to receive, through a second filter, information sent by the ONU using a second light source to the OLT in a registration and online process, wherein the second filter receives signals that need to be received in the registration and online process at a second speed, and the second speed is the number of signals received in the same time that is lower than the number of signals received at the first speed, and the first speed is the number of signals received when the ONU transmits optical signals in the PON.

[0228] In implementation, the OLT response module is further configured to respond to the ONU in response to one or a combination of the following messages:

[0229] Serial number request, serial number response, Ranging request, Ranging response, Ranging time, PWD request, PWD response.

[0230] During implementation, after the ONU completes the registration and online process, it further includes:

[0231] The OLT receiving module is further configured to receive, through the first filter, information sent by the ONU to the OLT using the first light source in the registration and online process;

[0232] The OLT response module is further used to respond to the ONU according to the ONU registration and online process requirements.

[0233] For the convenience of description, the various parts of the above-mentioned device are divided into various modules or units according to their functions and described separately. Of course, when implementing the present invention, the functions of each module or unit can be realized in the same or multiple software or hardware.

[0234] An embodiment of the present invention further provides a computer-readable storage medium storing a computer program for executing the above-mentioned ONU registration and online method on the ONU and / or OLT side.

[0235] For specific implementation, please refer to the implementation of the ONU registration and online method on the ONU and / or OLT side.

[0236] In summary, the technical solution provided by the embodiment of the present invention proposes a new ONU registration and online mechanism, which ultimately achieves ONU registration without windowing operation by adding low-speed and low-power optical signals to the terminal equipment online process.

[0237] The solution completes preliminary time slot alignment based on power adjustment and delay compensation mechanisms to implement the terminal equipment online process.

[0238] This solution proposes a terminal registration architecture based on weak light, which avoids the delay problem caused by registration windowing without additional wavelength planning, and improves the guarantee capability of low-latency services.

[0239] Those skilled in the art will appreciate that embodiments of the present invention may be provided as methods, systems, or computer program products. Thus, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment, or an embodiment combining software and hardware. Furthermore, the present invention may take the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to magnetic disk storage and optical storage, etc.) containing computer-usable program code.

[0240] The present invention is described with reference to flowcharts and / or block diagrams of methods, devices (systems), and computer program products according to embodiments of the present invention. It should be understood that each process and / or block in the flowcharts and / or block diagrams, as well as combinations of processes and / or blocks in the flowcharts and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to produce a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the flowcharts and / or block diagrams. Figure 1 a process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0241] These computer program instructions may also be stored in a computer readable memory that can direct a computer or other programmable data processing device to work in a specific manner, so that the instructions stored in the computer readable memory produce an article of manufacture comprising an instruction device, which implements the process Figure 1 a process or multiple processes and / or boxes Figure 1 The function specified in one or more boxes.

[0242] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operational steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing the instructions executed on the computer or other programmable device for implementing the process. Figure 1 a process or multiple processes and / or boxes Figure 1 A step that specifies a function in one or more boxes.

[0243] Obviously, those skilled in the art may make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if such changes and modifications fall within the scope of the claims and their equivalents, the present invention is intended to include such changes and modifications.

Claims

1. A method for registering and going online an optical network unit (ONU), characterized in that: include: The ONU uses a second light source to initiate a registration and online process to the optical line terminal OLT, wherein the power of the second light source is lower than the power of the first light source, and the first light source is the light source used by the ONU when transmitting optical signals in the passive optical network PON; The ONU responds to the request sent by the OLT in the registration and online process, wherein the response is sent using the second light source; The ONU sets the compensation delay according to the received message and aligns with the time slot to complete the registration and online process; The second light source is superimposed on an original uplink channel, and the original uplink channel is a channel for transmitting information from the ONU to the OLT.

2. The method according to claim 1, wherein Further including: After sending the request, if no response is received from the OLT, the power of the second light source is adjusted and the request is resent.

3. The method according to claim 2, wherein The power of the second light source is adjusted through a power level PL mechanism.

4. The method according to claim 1, wherein Further including: After sending the request, if the time slot cannot be aligned, the ONU uses the second light source to initiate a registration and online process to the OLT until the time slot is aligned according to the received instruction.

5. The method according to claim 1, wherein Further including: The ONU uses a second light source to initiate a registration and online process to the OLT, wherein the second light source sends the signals required to be sent in the registration and online process at a second speed. The second speed is the number of signals sent in the same time that is lower than the number of signals sent at the first speed. The first speed is the number of signals sent by the ONU when transmitting optical signals in the PON.

6. The method according to claim 1, wherein The response includes one or a combination of the following: Serial number response, ranging response, and password data PWD response.

7. The method according to any one of claims 1 to 6, characterized in that: After completing the registration and on-line process, further steps include: The ONU uses the first light source to initiate the registration and online process to the OLT; The ONU responds to the request sent by the OLT in the registration and online process, wherein the response is sent using the first light source; The ONU sets the compensation delay according to the received message to align with the time slot and completes the registration and online process.

8. An ONU registration and online method, characterized in that: include: The OLT receives, through a second filter, information sent by the ONU using a second light source to the OLT in a registration and online process, wherein the power of the second light source is lower than the power of the first light source, the first light source is a light source used by the ONU when transmitting optical signals in the PON, the light intensity of the optical signal received by the second filter is weaker than the light intensity of the optical signal received by the first filter, and the first filter is a filter used by the OLT when receiving optical signals in the PON; The OLT responds to the ONU according to the ONU registration and online process requirements; The second light source is superimposed on an original uplink channel, and the original uplink channel is a channel for transmitting information from the ONU to the OLT.

9. The method according to claim 8, wherein Further including: Instructions are sent according to different preset compensation delays to align the ONU with the time slot.

10. The method according to claim 8, wherein Further including: The OLT receives, through a second filter, information sent by the ONU using a second light source to the OLT in a registration and online process. The second filter receives signals required to be received in the registration and online process at a second speed. The second speed is a number of signals received within the same time period that is lower than the number at the first speed. The first speed is the number of signals received when the ONU transmits optical signals in the PON.

11. The method according to claim 8, wherein The message sent to the ONU in response to the ONU includes one or a combination of the following messages: Sequence number request, sequence number response, Ranging request, Ranging response, Ranging time, PWD request, PWD response.

12. The method according to any one of claims 8 to 11, characterized in that After the ONU completes the registration and onboarding process, it further includes: The OLT receives, through the first filter, information sent by the ONU to the OLT using the first light source during the registration and online process; The OLT responds to the ONU according to the ONU registration and online process requirements.

13. An ONU, characterized in that: include: The processor reads the program from the memory and performs the following steps: Initiate a registration and online process with the OLT using a second light source, wherein the power of the second light source is lower than the power of the first light source, and the first light source is the light source used by the ONU when transmitting optical signals in the PON; Responding to a request sent by the OLT in the registration and online process, wherein the response is sent using a second light source; Set the compensation delay according to the received message and align with the time slot to complete the registration and online process; a transceiver for receiving and sending data under the control of the processor; The second light source is superimposed on an original uplink channel, and the original uplink channel is a channel for transmitting information from the ONU to the OLT.

14. An ONU, characterized in that: include: An ONU registration module is configured to initiate a registration and online process to the OLT using a second light source, wherein the power of the second light source is lower than the power of the first light source, and the first light source is a light source used by the ONU when transmitting optical signals in the PON; An ONU response module is configured to respond to a request sent by the OLT in the registration and online process, wherein the response is sent using a second light source; The ONU online module is used to set the compensation delay according to the received message and align the time slot to complete the registration and online process; The second light source is superimposed on an original uplink channel, and the original uplink channel is a channel for transmitting information from the ONU to the OLT.

15. An OLT, characterized in that: include: The processor reads the program from the memory and performs the following steps: Receiving, through a second filter, information sent by the ONU to the OLT in a registration and online process using a second light source, wherein the power of the second light source is lower than the power of the first light source, the first light source is a light source used by the ONU when transmitting an optical signal in the PON, the light intensity of the optical signal received by the second filter is weaker than the light intensity of the optical signal received by the first filter, and the first filter is a filter used by the OLT when receiving the optical signal in the PON; Respond to the ONU according to the ONU registration and online process requirements; a transceiver for receiving and sending data under the control of the processor; The second light source is superimposed on an original uplink channel, and the original uplink channel is a channel for transmitting information from the ONU to the OLT.

16. An OLT, characterized in that: include: An OLT receiving module is configured to receive, through a second filter, information sent by the ONU to the OLT using a second light source in a registration and online process, wherein the power of the second light source is lower than the power of the first light source, the first light source is a light source used by the ONU when transmitting an optical signal in the PON, the light intensity of the optical signal received by the second filter is weaker than the light intensity of the optical signal received by the first filter, and the first filter is a filter used by the OLT when receiving an optical signal in the PON; The OLT response module is used to respond to the ONU according to the ONU registration and online process requirements; The second light source is superimposed on an original uplink channel, and the original uplink channel is a channel for transmitting information from the ONU to the OLT.

17. A computer-readable storage medium, characterized in that The computer-readable storage medium stores a computer program for executing the method according to any one of claims 1 to 12.

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