Working system of flexible rate PON, PON network architecture and equipment

Abstract

The invention relates to the field of optical communication, and particularly provides a working system of a flexible rate PON (Passive Optical Network), a PON network architecture and equipment, so that a PON port supports flexible combination work of uplink and downlink rates, and supports deterministic forwarding and time and clock synchronous transmission. Uplink or downlink channels of the PON ports are one or more channels, the rates of the channels are the same or different, and the downlink channels and the uplink channels with different or same rates of the PON ports of the PON network are randomly combined; and based on different scene types, determining a downlink channel rate and uplink channel rate combination required for the PON network to work under the scene type, and transmitting service data required by the corresponding scene. According to the invention, the requirements of a PON port uplink and downlink multi-rate networking mode in a complex service application scene of a PON network and deterministic forwarding and time and clock synchronous transmission required by the scene are met.

Description

Technical Field

[0001] The present invention relates to the field of optical communication, and particularly to a working system, a PON network architecture and a device of a flexible rate PON. Background Art

[0002] Currently, PON (Passive Optical Network) technology has become the mainstream technology for home broadband, and is also increasingly applied to fields such as industrial control and vehicle-mounted communication. However, in these emerging application fields, with the increasing complexity of communication scenarios, users' requirements for high bandwidth, low latency, and low latency jitter are also becoming higher and higher.

[0003] In order to meet the demand for high bandwidth, the industry generally upgrades the PON network. For example, upgrading from GPON (Gigabit Passive Optical Network) to XGPON (10-Gigabit-capable Passive Optical Network) or XGSPON (10-Gigabit-capable Symmetric Passive Optical Network), or in future usage scenarios, using a passive optical network with a higher rate. In this case, for the PON network, there will be a situation where multiple different rates are used for networking. Especially in the vehicle-mounted network, the upstream and downstream rates need to be configured with different rates for different usage scenarios.

[0004] For example, in a PON network of a local area network, the upstream and downstream may have different rate requirements due to different network bandwidth requirements. For example, the upstream and downstream may have rates such as 1.244g, 2.488g, 9.976g, 24.883g, 49.766g, etc. Then a PON network is needed whose PON port rate can be configured and supports arbitrary matching registration of the upstream and downstream rates.

[0005] As Figure 1 shown, it describes the working scenario of a multi-rate OLT and a multi-rate ONU networking together, but there is currently no suitable solution for this working scenario. Therefore, the field needs a working mechanism for a flexible rate PON to solve the above technical problems. Summary of the Invention

[0006] To overcome the above-mentioned deficiencies, the present invention is proposed to provide a solution to or at least partially solve the problem that the uplink and downlink rates of PON ports in a PON network cannot be independently configured and cannot be arbitrarily combined, resulting in the inability to meet the requirements for the networking modes of multiple uplink and downlink rates of PON ports in complex service application scenarios of the PON network.

[0007] In a first aspect, the present invention provides a PON network architecture, including: its uplink channel rate and downlink channel rate are the same or different, and the passive optical network PON consists of three parts: an optical line terminal OLT, a passive optical distribution network ODN, and an optical network unit ONU:

[0008] The downlink channel of the PON port is one or more channels, and the rate of each channel is the same or different. Its uplink channel is one or more, and the rate of each channel is the same or different, and the downlink channels with different or the same rates of the PON port of the PON network are arbitrarily combined with the uplink channels; wherein, the PON port is at least provided on the OLT and the ONU;

[0009] Based on different scenario types, determine the combination of the downlink channel rate and the uplink channel rate required for the PON network to operate in this scenario type, and transmit service data corresponding to the requirements of the scenario.

[0010] In one embodiment, the uplink channel rate and the downlink channel rate of the PON port of the PON network are arbitrarily combined, and based on the rate combination, at least one of the following actions is performed: ONU discovery, registration and service forwarding, ONU operation and maintenance management, time and clock transfer.

[0011] In one embodiment, the size of the window for discovering the ONU is configured according to the requirements of the scenario.

[0012] In one embodiment, the same or different optical signal encodings are used for different uplink and downlink channels; wherein, the optical signal encoding mode includes at least one of the following: NRZ, PAM, duobinary; wherein, the PAM includes at least one of the following: PAM4, PAM8.

[0013] In one embodiment, when determining the combination of the downlink channel rate and the uplink channel rate required for the PON network to operate in this scenario type based on different scenario types and transmitting service data corresponding to the requirements of the scenario, determine the bandwidth allocation during the data transmission process; wherein, the bandwidth allocation strategy includes at least one of the following: fixed bandwidth allocation, dynamic bandwidth allocation.

[0014] In one embodiment, based on the first scenario type, determine that the uplink rate corresponding to the first scenario type is less than the downlink rate;

[0015] Based on the second scenario type, determine that the uplink rate corresponding to the second scenario type is equal to the downlink rate;

[0016] Based on the third scenario type, determine that the uplink rate corresponding to the third scenario type is greater than the downlink rate.

[0017] In one embodiment, the first scenario type includes at least one of the following: watching videos, listening to music, downloading files;

[0018] The second scenario type includes at least one of the following: playing games, video calls;

[0019] The third scenario type includes at least one of the following: vehicle-mounted camera monitoring, vehicle-mounted radar monitoring, video monitoring.

[0020] In one embodiment, the interfaces, messages, or protocol types supported by the PON network include at least one of the following: Mobile Industry Processor Interface (MIPI), Camera Serial Interface (CSI), Display Serial Interface (DSI), DisplayPort (DP) interface, Embedded DisplayPort (EDP) interface, IP message, Ethernet message, I2C protocol, Controller Area Network (CAN) bus protocol, Local Interconnect Network (LIN) protocol.

[0021] In one embodiment, the OLT locally generates a first clock or time, and / or, after the OLT obtains a second clock or time from an external network through a wireless or wired connection and transmits it to the ONU through the PON port;

[0022] The ONU obtains the first clock or time, and / or, the second clock or time;

[0023] The PON network is a deterministic network, that is, based on the clocks or times obtained by the OLT and the ONU, the residence time of messages inside the OLT and the ONU is adjusted to achieve deterministic forwarding.

[0024] In one embodiment, after the ONU obtains the first clock or time, and / or, the second clock or time, it outputs a synchronization control signal to the sensors connected to the ONU to control the start time of the sensors uploading data.

[0025] In one embodiment, a PON port of an OLT is connected to one or more ONUs, and through the synchronization control signal, the sensors connected to the one or more ONUs are controlled to work synchronously and transmit the data collected by the sensors to the OLT synchronously.

[0026] In one embodiment, the sensors are deployed in the entire space, and the computing unit connected to the OLT obtains the information transmitted by the sensors in a synchronous manner.

[0027] In one embodiment, after the ONU obtains the first clock or time, and / or the second clock or time, based on the obtained clock or time, the ONU controls the residence time of the packets sent from the ONU to the downstream device inside the ONU;

[0028] After the OLT locally generates the first clock or time, and / or the OLT obtains the second clock or time from an external network through a wireless or wired connection, the OLT controls the residence time of the packets sent out from the upstream interface of the OLT in the OLT.

[0029] In one embodiment, the scenarios applicable to the PON network include at least one of the following: industrial control scenarios, vehicle-mounted scenarios.

[0030] In a second aspect, the present invention provides a working system for a flexible-rate PON applied to a PON network architecture, where the upstream channel rate and the downstream channel rate are the same or different. The passive optical network PON consists of three parts: an optical line terminal OLT, a passive optical distribution network ODN, and an optical network unit ONU, and includes

[0031] The downstream channel of the PON port is one or more channels, and the rate of each channel is the same or different. Its upstream channel is one or more, and the rate of each channel is the same or different. Moreover, for the PON port of the PON network, any combination of downstream channels and upstream channels with different or the same rates is possible; wherein, the PON port is provided at least on the OLT and the ONU;

[0032] Based on different scenario types, the combination of the downstream channel rate and the upstream channel rate required for the PON network to work in this scenario type is determined, and the service data required by the corresponding scenario is transmitted.

[0033] In a third aspect, the present invention provides a device for a flexible-rate PON applied to a PON network architecture, including: an encoding module, a configuration module, and a scenario rate adaptation transmission module; the encoding module is connected to the scenario rate adaptation transmission module through the configuration module;

[0034] The encoding module is used to use the same or different encodings for the upstream channel and the same or different encodings for the downstream channel,

[0035] The configuration module: the downstream channel of the PON port is one or more channels, and the rate of each channel is the same or different; the upstream channel of the PON port is one or more, and the rate of each channel is the same or different, where the PON port is provided at least on the OLT and the ONU;

[0036] A scenario rate adaptation transmission module is used to determine, based on different scenario types, the combination of the downstream channel rate and the upstream channel rate required for the PON network to operate in the scenario type, and transmit service data corresponding to the requirements of the scenario.

[0037] In one embodiment, it further includes: a bandwidth allocation module; the bandwidth allocation module is located in the scenario rate adaptation transmission module; the bandwidth allocation module, located at the OLT, is used to detect the bandwidth utilization rate of the ONU's uplink or the bandwidth requirements actively reported by the ONU, and combine the ONU service type attributes configured by the OLT to perform dynamic bandwidth calculation and allocation; it is also used to configure the upstream bandwidth for each ONU at the OLT, and the OLT authorizes the corresponding OLT upstream bandwidth for the ONU according to the configuration.

[0038] In one embodiment, it further includes: a time and clock synchronization module; the time and clock synchronization module is located in the scenario rate adaptation transmission module; the time and clock synchronization module is used to be set in the OLT and the ONU, the OLT operates in the master mode, and the ONU operates in the slave mode, where the OLT and the ONU achieve time and / or clock synchronization through one of the following information: delivery time, frame header position.

[0039] In one embodiment, it further includes: a deterministic message forwarding control module; the deterministic message forwarding control module is located in the scenario rate adaptation transmission module; the deterministic message forwarding control module is used to adjust the residence time of the message inside the OLT and the ONU when the OLT and the ONU send messages outward after achieving the same time information resident inside through time synchronization, so as to achieve deterministic forwarding.

[0040] In one embodiment, it further includes: a protocol conversion module, a PON network correct transmission control module; the protocol conversion module and the PON network correct transmission control module are located in the scenario rate adaptation transmission module;

[0041] The protocol conversion module is used to map one of the following protocols to the PON port: MIPI, I2C, CAN, LIN;

[0042] The PON network correct transmission control module is used to achieve correct transmission through one of the following means: PON supports retransmission, the PON network supports protection, and the GEM frame adds CRC check.

[0043] One or more of the above technical solutions of the present invention have at least one or more of the following beneficial effects:

[0044] Technical solution of the present invention: In a PON network architecture, the upstream channel rate and the downstream channel rate are the same or different. The passive optical network PON consists of three parts: an optical line terminal OLT, a passive optical distribution network ODN, and an optical network unit ONU. The downstream channel of the PON port is one or more channels, and the rate of each channel is the same or different. Its upstream channel is one or more, and the rate of each channel is the same or different. Moreover, any combination of the downstream channels with different or the same rates and the upstream channels of the PON port of the PON network is possible; wherein, the PON port is disposed at least on the OLT and the ONU; based on different scenario types, the combination of the downstream channel rate and the upstream channel rate required for the PON network to operate in this scenario type is determined, and service data corresponding to the requirements of the scenario is transmitted.

[0045] Through the above solution, independent configuration of the upstream and downstream rates of the PON port is achieved, and the upstream and downstream rates can be arbitrarily combined, meeting the requirements for the networking modes of multiple rates of the PON port's upstream and downstream in the complex service application scenarios of the PON network, making the networking more convenient and the cost lower.

[0046] In this embodiment, the upstream channel rate and the downstream channel rate of the PON port of the PON network are arbitrarily combined. Based on this rate combination, at least one of the following actions is performed: ONU discovery, registration and service forwarding, operation and maintenance management of the ONU, time and clock transfer; wherein, the size of the window for discovering the ONU by windowing is configured according to the scenario requirements. The smaller the ONU discovery window, the shorter the supported distance and the smaller the service transmission delay.

[0047] In this embodiment, based on different scenario types, when determining the combination of the downstream channel rate and the upstream channel rate required for the PON network to operate in this scenario type and transmitting service data corresponding to the requirements of the scenario, the bandwidth allocation during the data transmission process is determined; wherein, the bandwidth allocation strategy includes at least one of the following: fixed bandwidth allocation, dynamic bandwidth allocation. The type of bandwidth can be fixed bandwidth or dynamically allocated bandwidth, and the bandwidth allocation period can be flexibly configured according to the service delay.

[0048] In this embodiment, based on the first scenario type, it is determined that the uplink rate corresponding to the first scenario type is less than the downlink rate; based on the second scenario type, it is determined that the uplink rate corresponding to the second scenario type is equal to the downlink rate; based on the third scenario type, it is determined that the uplink rate corresponding to the third scenario type is greater than the downlink rate; the first scenario type includes at least one of the following: watching videos, listening to music, downloading files; the second scenario type includes at least one of the following: playing games, video calls; the third scenario type includes at least one of the following: vehicle-mounted camera monitoring, vehicle-mounted radar monitoring, video monitoring. The above scheme meets the demand for networking modes with multiple uplink and downlink rates of the PON port in complex business application scenarios of the PON network, making networking more convenient and less costly.

[0049] In this embodiment, the interface, message or protocol type supported by the PON network includes at least one of the following: mobile industry processor interface MIPI, camera serial interface CSI, display interface DSI, DP interface, embedded display port EDP, IP message, Ethernet message, I2C protocol, CAN bus protocol, LIN protocol. OLT and ONU support interfaces or protocols such as MIPI, I2C, CAN, LIN, etc., and these interfaces or protocols are mapped to PON interfaces through conversion modules, supporting transparent transmission of these protocols or interfaces.

[0050] In this embodiment, after the OLT and ONU synchronize the time and retain the same time information internally, the OLT and ONU adjust the internal residence time of the message in the OLT and ONU when sending the message outward to realize deterministic forwarding. After the ONU obtains the clock or time, it can control the internal residence time of the message sent by the ONU to the downstream device based on the obtained clock or time. Through the control of the residence time, the transmission time of the service message between the downstream ports of any two ONUs can be the same; the OLT itself also uses the generated or obtained time to control the residence time of the message sent from the OLT upstream interface in the OLT. The control of the resident clock can realize the same transmission delay between the OLT upstream interface and the ONU downstream interface of the entire PON network. BRIEF DESCRIPTION OF THE DRAWINGS

[0051] The disclosure of the present invention will become more easily understood with reference to the accompanying drawings. It is easy for those skilled in the art to understand that these drawings are only for illustrative purposes and are not intended to limit the scope of protection of the present invention. In addition, similar numbers in the figures are used to represent similar components, among which:

[0052] Figure 1 A working scenario based on a common networking of a multi-rate OLT and a multi-rate ONU according to an embodiment of the present invention;

[0053] Figure 2Schematic diagram of the main steps of an implementation method of flexible-rate PON based on PON network architecture according to an embodiment of the present invention;

[0054] Figure 3 Working scenario in a PON network where the uplink bandwidth requirement is less than the downlink bandwidth according to an embodiment of the present invention;

[0055] Figure 4 Working scenario in a PON network where the uplink bandwidth requirement is equal to the downlink bandwidth according to an embodiment of the present invention;

[0056] Figure 5 Working scenario in a PON network where the uplink bandwidth requirement is greater than the downlink bandwidth according to an embodiment of the present invention;

[0057] Figure 6 Schematic diagram of the main structural block diagram of a flexible-rate PON device applied to a PON network architecture according to an embodiment of the present invention. Detailed implementation manners

[0058] The following describes some implementation manners of the present invention with reference to the accompanying drawings. Those skilled in the art should understand that these implementation manners are only used to explain the technical principle of the present invention and are not intended to limit the protection scope of the present invention.

[0059] In the description of the present invention, "module" and "processor" may include hardware, software, or a combination of both. A module may include a hardware circuit, various suitable sensors, communication ports, memories, and may also include a software part, such as program code, or a combination of software and hardware. The processor may be a central processing unit, a microprocessor, an image processor, a digital signal processor, or any other suitable processor. The processor has data and / or signal processing functions. The processor may be implemented in software, in hardware, or in a combination of both. The non-transitory computer-readable storage medium includes any suitable medium for storing program code, such as magnetic disks, hard disks, optical disks, flash memories, read-only memories, random access memories, and so on. The term "A and / or B" represents all possible combinations of A and B, such as only A, only B, or A and B. The term "at least one A or B" or "at least one of A and B" has a meaning similar to "A and / or B" and may include only A, only B, or A and B. The singular terms "a" and "this" may also include the plural form.

[0060] Technical terms:

[0061] OLT (Optical Line Terminal) is the core device in a fiber access network and is mainly used to connect the fiber trunk and user equipment;

[0062] The ONU (Optical Network Unit) is a network device mainly used in fiber access networks as a bridge between the user-side device and the fiber network.

[0063] This invention mainly focuses on the adaptation and cost control of various application scenarios of the PON network. Whether it is in communities, home gateways using the PON network; campus networks; in-vehicle networks; industrial control networks, due to the low-bandwidth terminals existing in the network itself, and new higher-bandwidth terminals will join the current network with the technological evolution, there will be situations where multiple rates cannot be compatible. The current technology uses a multi-channel single-wavelength continuous downstream optical signal for the processing of downstream data in the PON network, and the processing of multiple rates is not very ideal. To address this problem, this invention proposes a new solution idea: that is, by dynamically configuring the rate of the PON port into different rates, while ensuring that any combination can be made between various rates.

[0064] Overview of the technical solution of this invention:

[0065] The technical solution of this invention: In the PON network architecture, the upstream channel rate and the downstream channel rate can be the same or different. The passive optical network PON consists of three parts: an optical line terminal OLT, a passive optical distribution network ODN, and an optical network unit ONU. The downstream channel of the PON port is one or more channels, and the rate of each channel can be the same or different. Its upstream channel is one or more, and the rate of each channel can be the same or different, and any combination can be made between the downstream channels with different or the same rates and the upstream channels of the PON network; among them, the PON port is at least set on the OLT and the ONU; based on different scenario types, determine the combination of the downstream channel rate and the upstream channel rate required for the PON network to work in this scenario type, and transmit the service data required by the corresponding scenario.

[0066] Through the above solution, the independent configuration of the upstream and downstream rates of the PON port is realized, and the upstream and downstream rates can be arbitrarily combined, meeting the requirements of the networking mode of multiple rates for the PON port in the complex service application scenarios of the PON network, making the networking more convenient and the cost lower.

[0067] Figure 1 It is the working scenario of jointly networking multiple-rate OLTs and multiple-rate ONUs according to an embodiment of this invention. As Figure 1 shown, the upstream rate of the PON port can be configured as 1.0g, 2.5g, 10g; the downstream rate of the PON port can be configured as 1.0g, 2.5g, 10g, 25g, and the upstream rate can be arbitrarily combined and registered with the downstream rate.

[0068] Figure 2 Implementation method of flexible-rate PON based on PON network architecture according to an embodiment of the present invention. The PON network architecture consists of three parts: an optical line terminal OLT, a passive optical distribution network ODN, and an optical network unit ONU. The upstream channel rate and the downstream channel rate in the PON network are the same or different.

[0069] Specific implementation includes the following steps:

[0070] Step S201: The downstream channel of the PON port is one or more channels, and the rate of each channel is the same or different. Its upstream channel is one or more, and the rate of each channel is the same or different. And any combination of downstream channels with different or the same rates and upstream channels on the PON port of the PON network is allowed.

[0071] In this embodiment, the PON port is at least provided on the OLT and the ONU.

[0072] In this embodiment, the same or different optical signal encodings are adopted for different upstream and downstream channels. Among them, the optical signal encoding mode includes at least one of the following: NRZ, PAM, duobinary; among them, the PAM includes at least one of the following: PAM4, PAM8. By different optical signal encoding modes, different upstream channel rates and downstream channel rates are obtained. Different encodings adapt to the performance parameters of different optical layers and electrical layers.

[0073] In this embodiment, the interfaces, messages or protocol types supported by the PON network include at least one of the following: Mobile Industry Processor Interface MIPI, Camera Serial Interface CSI, Display Serial Interface DSI, DP interface, Embedded DisplayPort EDP, IP message, Ethernet message, I2C protocol, CAN bus protocol, LIN protocol. The OLT and ONU support interfaces or protocols such as MIPI, I2C, CAN, LIN, etc. Through a conversion module, these interfaces or protocols are mapped to the PON interface to support transparent transmission of these protocols or interfaces.

[0074] Step S202: Based on different scenario types, determine the combination of the downstream channel rate and the upstream channel rate required for the PON network to work in this scenario type, and transmit service data corresponding to the requirements of the scenario.

[0075] In this embodiment, after determining the combination of the downstream channel rate and the upstream channel rate required for the PON network to work in this scenario type based on different scenario types, at least one of the following actions is performed: ONU discovery, registration and service forwarding, ONU operation and maintenance management, time and clock transfer.

[0076] In this embodiment, the size of the window for discovering the ONU is configured according to the requirements of the scenario. The smaller the ONU discovery window, the shorter the supported distance and the smaller the service transmission delay.

[0077] In this embodiment, based on different scenario types, the combination of the downstream channel rate and the upstream channel rate required for the PON network to operate in this scenario type is determined. When transmitting service data corresponding to the requirements of the scenario, the bandwidth allocation during the data transmission process is determined; among them, the bandwidth allocation strategy includes at least one of the following: fixed bandwidth allocation, dynamic bandwidth allocation. The type of bandwidth can be fixed bandwidth or dynamically allocated bandwidth, and the bandwidth allocation period can be flexibly configured according to the service delay. It can meet the bandwidth allocation function in multiple networking modes after the rate configuration.

[0078] Specifically, for various different usage scenarios of the PON network, there will be ONUs with various different bandwidths in the downstream, such as GPON-ONU, XGPON-ONU, etc. In this embodiment, the method of configurable single PON port rate is used for networking in both the upstream and downstream directions. Whether for the OLT or the ONU, the rate at the PON port level can be configured according to actual needs and its DBA (Dynamic Bandwidth Assignment) can perform bandwidth allocation specifically according to the rate configured at the PON port.

[0079] In this embodiment, based on the determined upstream rate and downstream rate, by adjusting the bit widths of the serial data based on the parallel data conversion for transmission and the parallel data based on the serial data conversion, the bandwidth allocation corresponding to the upstream rate and downstream rate during the transmission process is realized. Through the dynamic bandwidth allocation mode, the bandwidth allocation function in multiple networking modes after the rate combination can be satisfied.

[0080] In this embodiment, the OLT locally generates the first clock or time, and / or, after the OLT obtains the second clock or time from the external network through a wireless or wired connection method, it is transmitted to the ONU through the PON port; the ONU obtains the first clock or time, and / or the second clock or time; the PON network is a deterministic network, that is, based on the clock or time obtained by the OLT and the ONU, the residence time of the message in the OLT and the ONU is adjusted to achieve deterministic forwarding.

[0081] In this embodiment, after the ONU obtains the first clock or time, and / or the second clock or time, it outputs a synchronization control signal to the sensor connected to the ONU to control the start time of the sensor to upload data.

[0082] In this embodiment, after the ONU obtains the first clock or time, and / or the second clock or time, based on the obtained clock or time, the ONU controls the residence time of the packets sent by the ONU to the downstream device inside the ONU; the OLT locally generates the first clock or time, and / or after the OLT obtains the second clock or time from the external network through a wireless or wired connection, the OLT controls the residence time of the packets sent from the upstream interface of the OLT in the OLT.

[0083] After the ONU obtains the clock or time, it can control the residence time of the packets sent by the ONU to the downstream device inside the ONU based on the obtained clock or time. By controlling the residence time, the transmission time of the service packets between the downstream ports of any two ONUs can be made the same; the OLT itself also uses the generated or obtained time to control the residence time of the packets sent from the upstream interface of the OLT in the OLT. By controlling the residence clock, the transmission delay between the upstream interface of the OLT and the downstream interface of the ONU in the entire PON network can be made the same. That is, a deterministic network is formed between the upstream interface of the OLT and the downstream interface of the ONU, and the forwarding time of the service forwarding between any interfaces is determined according to the configuration requirements.

[0084] In this embodiment, the scenarios applicable to the PON network include at least one of the following: industrial control scenarios, vehicle-mounted scenarios.

[0085] In this embodiment, the PON port of an OLT is connected to one or more ONUs. Through the synchronization control signal, the sensors connected to the one or more ONUs are controlled to work synchronously and transmit the data collected by the sensors to the OLT synchronously.

[0086] In this embodiment, the sensors are deployed in the entire space, and the computing unit connected to the OLT obtains the information of the entire space in a synchronous manner.

[0087] In this embodiment, based on the first scenario type, it is determined that the uplink rate corresponding to the first scenario type is less than the downlink rate; based on the second scenario type, it is determined that the uplink rate corresponding to the second scenario type is equal to the downlink rate; based on the third scenario type, it is determined that the uplink rate corresponding to the third scenario type is greater than the downlink rate.

[0088] Among them, the first scenario type includes at least one of the following: watching videos, listening to music, downloading files; the second scenario type includes at least one of the following: playing games, video calls; the second scenario type is generally a two-way delivery service type, for example: playing games, video calls;

[0089] The third scenario type includes at least one of the following: in-vehicle camera monitoring, in-vehicle radar monitoring, video monitoring; the third scenario type includes sensor service types, such as: in-vehicle camera monitoring, in-vehicle radar monitoring; it can also be a video monitoring scenario.

[0090] The above solution meets the requirements for the networking modes of multiple uplink and downlink rates of PON ports in complex service application scenarios of PON networks, making the networking more convenient and cost-effective.

[0091] The following is a detailed description with specific examples:

[0092] 1. For OLT and ONU, the uplink and downlink of each PON port can be independently configured with rates according to the situation during networking, and can be configured with rates such as 1.244g, 2.488g, 9.976g, 24.883g, 49.766g, etc., and the uplink and downlink rates can be registered in any combination.

[0093] The method for configuring the PON port can be as follows:

[0094] A. At the physical layer, since the PON port needs to be able to meet the configuration of multiple rates, different optical signal coding modes are used for different PON port rates. For example, PAM0 coding is used for 1.244g, NRZ coding is used for 2.488g, and PAM8 coding is used for 9.976g.

[0095] For the PON port, there can actually be only one optical rate theoretically. Then, different coding methods are needed to modify the rate of the data transmitted and received on the PON port, that is, the amount of data information carried at the same optical signal rate is different. The theoretical formula is that assuming the actual rate of the PON port is 1.244g and its coding method is PAM0, then according to the proportional relationship, the coding method should be PAM4 at the actual rate of 4.97664g. And so on.

[0096] B. At the physical layer, if the PON port rate needs to be configurable, then for SerDes (Serializer / Deserializer), it needs to be able to perform serial-to-parallel conversion on serial data with different rates, that is, different coding modes, and convert the serial data into parallel data. At the same time, for different rates, the parallel data needs to be able to increase or decrease its parallel data bit width after configuration. Here, the bit width of the serial data is configured according to its different rates in proportion. At the same time, the uplink and downlink rates can be decoupled for configuration, that is, the uplink and downlink directions have independent configurable rates and data bit widths.

[0097] SerDes (Serializer / Deserializer) is a mature communication technology that converts parallel data into serial data for transmission and restores the serial data to parallel data at the receiving end. It is mainly used to reduce the number of physical connections required for transmission and improve the data transmission speed and efficiency.

[0098] At the sending end, SerDes converts multiple low-speed parallel signals into high-speed serial signals for transmission through a transmission medium (such as an optical cable or copper wire). At the receiving end, SerDes then converts the high-speed serial signals back into low-speed parallel signals for further processing or storage.

[0099] The process of serial-to-parallel conversion includes: at the sending end, parallel data is converted into serial data by a serializer; at the receiving end, a deserializer converts the serial data back into parallel data. This conversion utilizes time-division multiplexing (TDM) technology to transmit data by dividing the channel in time.

[0100] The configuration method is as follows: First, the configuration of the PON port rate is not an adaptive configuration, but the upstream and downstream rates required by the known PON port are configured (for example, 1.244g for upstream configuration and 4.976g for downstream configuration). Then, according to the different rates, the corresponding parallel data bit widths after serial-to-parallel conversion increase or decrease proportionally. For the specific configuration method, an accessible register module can be added internally to preset multiple different rate modes. In terms of software, the specific rate mode is configured by accessing this register module.

[0101] C. After SerDes converts the serial data into parallel data, in a traditional PON mode, the parallel data is usually used to identify the delimiter through slip code, determine the position of the payload in this frame, and parse the data content related to the PON protocol. In this embodiment, since it is necessary to meet the configuration of multiple different rates on the PON port, the delimiter recognition module needs to be able to configure the delimiter function for multiple cases simultaneously for different data bit widths. After that, data with multiple different bit widths can be spliced and processed according to a module hierarchy similar to the traditional PON protocol.

[0102] D. First, since this embodiment requires configuring different upstream and downstream rates on a single PON port, but there are different protocol standards such as GPON, XGPON, and 50G-PON for PON at different rates, a general protocol format is designed in this embodiment (the transmission protocol adopted includes at least one of the following fields: PON port identifier, upstream rate and / or downstream rate corresponding to the PON port identifier, service type), so as to enable registration and service interaction at multiple configurable rates.

[0103] 2. For the above situation, an independent decoupling mode of bandwidth allocation is designed. The DBA mode can meet the mode where the PON port rate can be configured and registered in any combination as mentioned above. And for the bit width on the SerDes bus, it can be arbitrarily configured according to different rates, so as to meet the same delay of bandwidth allocation at different rates.

[0104] This embodiment proposes a DBA method for configurable PON port rates: Since the PON port rate mentioned in the foregoing method can be configured, for the situation where the upstream and downstream rates of a single PON port are inconsistent and can be dynamically configured, simply using the traditional DBA mode cannot meet the existing situation. This embodiment proposes to use the parallel data after SerDes serial-parallel conversion as a bus signal with a configurable bit width to meet the same delay of its bandwidth allocation. At the same time, for different rates, the bandwidth allocation is necessarily not completely the same, so this embodiment implements a DBA module configured according to the upstream and downstream rates, which can meet the dynamic bandwidth allocation when the PON port is configured to different rates.

[0105] In this embodiment, since multiple rates can be configured under a single PON port, there will be a situation of allocating multiple rates in a single time slot for dynamic bandwidth allocation, that is, it is possible to allocate the bandwidth of an ONU with an upstream rate of 1.244G or an ONU with an upstream rate of 9.976G in the same time slot. Then the principle is that the dynamic bandwidth allocation needs to meet the bandwidth allocation situations at the aforementioned multiple rates. In the specific design, it is currently considered to be consistent with the current bandwidth allocation method of the PON network, but it is compatible with more rate situations and can be adjusted according to the rate configuration.

[0106] The OLT locally generates a first clock or time, and / or the OLT obtains a second clock or time from an external network through a wireless or wired connection, and transmits the second clock or time to the ONU through the PON port; the ONU obtains the first clock or time, and / or the second clock or time; the PON network is a deterministic network, that is, based on the clock or time obtained by the OLT and the ONU, the message residence time inside the OLT and the ONU is adjusted to achieve deterministic forwarding.

[0107] After the ONU obtains the first clock or time, and / or the second clock or time, based on the obtained clock or time, it controls the residence time of the message sent by the ONU to the downstream device inside the ONU; the OLT locally generates the first clock or time, and / or, after the OLT obtains the second clock or time from the external network through a wireless or wired connection, it controls the residence time of the message sent from the OLT uplink interface in the OLT.

[0108] That is:

[0109] After the ONU obtains the clock or time, it can control the residence time of the message sent by the ONU to the downstream device in the ONU based on the obtained clock or time. By controlling the residence time, the service message transmission time between the downstream ports of any two ONUs can be the same; the OLT itself also uses the generated or obtained time to control the residence time of the message sent from the OLT upstream interface in the OLT. The control of the residence clock can achieve the same transmission delay between the OLT upstream interface and the ONU downstream interface of the entire PON network. That is, a deterministic network is formed between the OLT upstream interface and the ONU downstream interface, and the forwarding time of the service forwarding between any interfaces is determined according to the configuration requirements.

[0110] Figure 3 According to an embodiment of the present invention, in a PON network, the upstream bandwidth requirement is smaller than the downstream bandwidth. Figure 3 As shown, the uplink rate is 2.5g and the downlink rate is 10g.

[0111] In combination with specific working scenarios, if you watch videos, listen to music and other activities on the vehicle network, for such a PON network, there is a working mode with small upstream bandwidth requirements and large downstream bandwidth requirements. Then it can be assumed that the upstream rate is configured to 2.5g and the downstream rate is configured to 10g. That is, the upstream rate of the PON port of the OLT and ONU in this network is 2.5g and the downstream rate is 10g. In this mode, it is necessary to meet the working scenario where the upstream bandwidth requirement is less than the downstream bandwidth.

[0112] Figure 4 According to an embodiment of the present invention, in a PON network, the upstream bandwidth requirement is equal to the downstream bandwidth. Figure 4As shown, the upstream rate is 2.5g and the downstream rate is 2.5g.

[0113] Combined with specific application scenarios:

[0114] When conducting two-way delivery service types such as gaming and video calls on a vehicle-mounted network, for such a PON network at this time, there is a working mode where the upstream bandwidth is equal to the downstream bandwidth. Then it can be assumed that the upstream rate is configured as 2.5g and the downstream rate is configured as 2.5g. That is, the upstream and downstream rates of the PON ports of the OLT and ONU in this network are symmetric at 2.5g. In this mode, it is necessary to meet the working scenario where the upstream bandwidth requirement is equal to the downstream.

[0115] Figure 5 According to an embodiment of the present invention, in a PON network where the upstream bandwidth requirement is greater than the downstream bandwidth, as Figure 5 shown, the upstream rate is 10g and the downstream rate is 2.5g.

[0116] Combined with specific application scenarios:

[0117] When the vehicle-mounted network cameras, vehicle-mounted radars, video surveillance, etc. are working, for such a PON network at this time, there is a working mode where the upstream bandwidth requirement is large and the downstream bandwidth requirement is small. Then it can be assumed that the upstream rate is configured as 10g and the downstream rate is configured as 2.5g. That is, the upstream rate of the PON ports of the OLT and ONU in this network is 10g and the downstream rate is 2.5g. In this mode, it is necessary to meet the working scenario where the upstream bandwidth requirement is greater than the downstream.

[0118] The present invention also provides a working system of a flexible rate PON applied to a PON network architecture, whose upstream channel rate and downstream channel rate are the same or different. The passive optical fiber network PON consists of three parts: an optical line terminal OLT, a passive optical distribution network ODN, and an optical network unit ONU, including

[0119] The downstream channel of the PON port is one or more channels, and the rate of each channel is the same or different. Its upstream channel is one or more, and the rate of each channel is the same or different. Moreover, for the PON port of the PON network, any combination of downstream channels and upstream channels with different or the same rates; among them, the PON port is at least set on the OLT and the ONU;

[0120] Based on different scenario types, determine the combination of the downstream channel rate and the upstream channel rate required for the PON network to work in this scenario type, and transmit service data corresponding to the requirements of the scenario.

[0121] Through the above system, the independent configuration of the upstream and downstream rates of the PON port is achieved, and the upstream and downstream rates can be arbitrarily combined, meeting the requirements of the networking modes with various upstream and downstream rates of the PON port in the complex service application scenarios of the PON network, making the networking more convenient and the cost lower.

[0122] Figure 6 FIG. is a schematic diagram of the main structural block diagram of a flexible rate PON device applied to a PON network architecture according to an embodiment of the present invention, characterized in that, as Figure 6 shown, it includes: an encoding module 601, a configuration module 602, and a scenario rate adaptation transmission module 603; the encoding module 601 is connected to the scenario rate adaptation transmission module 603 through the configuration module 602;

[0123] The encoding module 601 is used to adopt the same or different encodings for the upstream channel and the same or different encodings for the downstream channel.

[0124] The configuration module 602, the downstream channel of the PON port is one or more channels, and the rate of each channel is the same or different; the upstream channel of the PON port is one or more, and the rate of each channel is the same or different, wherein the PON port is at least provided in the OLT and the ONU;

[0125] The scenario rate adaptation transmission module 603 is used to determine the combination of the downstream channel rate and the upstream channel rate required for the PON network to work in this scenario type based on different scenario types, and transmit the service data corresponding to the scenario requirements.

[0126] In this embodiment, it further includes: a bandwidth allocation unit 6031, which is located in the scenario rate adaptation transmission module 603;

[0127] The bandwidth allocation unit 6031 is located in the OLT, and is used to detect the bandwidth utilization rate of the ONU's uplink or the bandwidth requirements actively reported by the ONU, and combine the ONU service type attributes configured by the OLT to perform dynamic bandwidth calculation and allocation; it is also used to configure the uplink bandwidth for each ONU at the OLT, and the OLT authorizes the corresponding OLT uplink bandwidth for the ONU according to the configuration.

[0128] In this embodiment, it further includes: a time and clock synchronization module 6032, which is located in the scenario rate adaptation transmission module 603;

[0129] The time and clock synchronization module 6032 is used to be set in the OLT and the ONU, the OLT works in the master mode, and the ONU works in the slave mode, wherein between the OLT and the ONU, time and / or clock synchronization is achieved through one of the following information: delivery time, frame header position.

[0130] In this embodiment, it further includes: a deterministic packet forwarding control module 6033, which is located in the scenario rate adaptation transmission module 603;

[0131] The deterministic packet forwarding control module 6033 is used to adjust the residence time of packets inside the OLT and ONU when the OLT and ONU perform time synchronization and have the same internal resident time information, so as to achieve deterministic forwarding when the OLT and ONU send out packets.

[0132] In this embodiment, it further includes: a protocol conversion module 6034 and a PON network correct transmission control module 6035; the protocol conversion module 6034 and the PON network correct transmission control module 6035 are located in the scenario rate adaptation transmission module 603;

[0133] The protocol conversion module 6034 is used to map one of the following protocols to the PON port: MIPI, I2C, CAN, LIN;

[0134] The PON network correct transmission control module 6035 is used to achieve correct transmission by one of the following means: PON supports retransmission, PON network supports protection, and GEM frames add CRC check.

[0135] In some embodiments, one or more of the encoding module 601, the configuration module 602, and the scenario rate adaptation module 603 can be combined into one module. In one implementation manner, the description of the specific implementation functions can be referred to the steps of the above embodiments. One or more of the bandwidth allocation module 6031, the time and clock synchronization module 6032, the deterministic packet forwarding control module 6033, the protocol conversion module 6034, and the PON network correct transmission control module 6035 can be combined into one module. In one implementation manner, the description of the specific implementation functions can be referred to the steps of the above embodiments.

[0136] Through the above solution, independent configuration of the upstream and downstream rates of the PON port is achieved, and the upstream and downstream rates can be arbitrarily combined, meeting the requirements of the networking mode with multiple rates for the upstream and downstream of the PON port in the complex service application scenarios of the PON network, making the networking more convenient and the cost lower.

[0137] The above device of the flexible rate PON applied to the PON network architecture is used to execute Figure 2For the embodiments of the implementation method of flexible-rate PON based on the PON network architecture shown, since the technical principles, the technical problems solved, and the technical effects produced are similar, those skilled in the art can clearly understand that for the convenience and conciseness of description, the specific working process and related descriptions of a device of flexible-rate PON applied to the PON network architecture can refer to the content described in the embodiments of the implementation method of flexible-rate PON based on the PON network architecture, which will not be elaborated here.

[0138] Those skilled in the art can understand that all or part of the processes in the method of the above-mentioned embodiments of the present invention can also be completed by instructing relevant hardware through a computer program. The computer program can be stored in a computer-readable storage medium. When the computer program is executed by a processor, the steps of the above-mentioned method embodiments can be implemented. Among them, the computer program includes computer program code, and the computer program code can be in the form of source code, object code, executable file, or some intermediate form, etc. The computer-readable storage medium can include: any entity or device, medium, USB flash drive, mobile hard disk, magnetic disk, optical disc, computer memory, read-only memory, random access memory, electrical carrier signal, telecommunication signal, and software distribution medium that can carry the computer program code. It should be noted that the content included in the computer-readable storage medium can be appropriately increased or decreased according to the requirements of legislation and patent practice in the jurisdiction. For example, in some jurisdictions, according to legislation and patent practice, the computer-readable storage medium does not include electrical carrier signals and telecommunication signals.

[0139] Furthermore, the present invention also provides an optical network device. The optical network device includes a processor and a storage device. The storage device can be configured to store a program for implementing the implementation method of flexible-rate PON based on the PON network architecture in the above-mentioned method embodiments. The processor can be configured to execute the program in the storage device, and the program includes, but is not limited to, the program for implementing the implementation method of flexible-rate PON based on the PON network architecture in the above-mentioned method embodiments. For the convenience of description, only the parts related to the embodiments of the present invention are shown. For the specific technical details not disclosed, please refer to the method part of the embodiments of the present invention.

[0140] Further, the present invention also provides a readable storage medium. In an embodiment of the readable storage medium according to the present invention, the readable storage medium may be configured to store a program for implementing the method for implementing flexible-rate PON based on the PON network architecture in the above method embodiment. This program can be loaded and run by a processor to implement the above method for implementing flexible-rate PON based on the PON network architecture. For ease of description, only the parts related to the embodiments of the present invention are shown. For the specific technical details not disclosed, please refer to the method part of the embodiments of the present invention. The readable storage medium may be a storage device formed by various electronic devices. Optionally, the readable storage medium in the embodiments of the present invention is a non-transitory readable storage medium.

[0141] Further, it should be understood that since the setting of each module is only for illustrating the functional units of the device of the present invention, the corresponding physical devices of these modules can be the processor itself, or a part of the software in the processor, a part of the hardware, or a part of the combination of software and hardware. Therefore, the number of each module in the figure is only illustrative.

[0142] Those skilled in the art can understand that the various modules in the device can be adaptively split or combined. Such splitting or combination of specific modules will not cause the technical solution to deviate from the principle of the present invention. Therefore, the technical solutions after splitting or combination will all fall within the protection scope of the present invention.

[0143] So far, the technical solutions of the present invention have been described in conjunction with the preferred embodiments shown in the drawings. However, it is easy for those skilled in the art to understand that the protection scope of the present invention is obviously not limited to these specific embodiments. Without departing from the principle of the present invention, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will all fall within the protection scope of the present invention.

Claims

1. A PON network architecture, wherein the upstream channel rate and the downstream channel rate are the same or different, the passive optical network PON comprises an optical line terminal OLT, a passive optical distribution network ODN and an optical network unit ONU, characterized in that: The downstream channel of the PON port is one or more channels, each channel has the same or different rates, and the upstream channel is one or more channels, each channel has the same or different rates, and the downstream channels and upstream channels of different or same rates on the PON port of the PON network are arbitrarily combined; wherein the PON port is at least provided on the OLT and the ONU; Based on different scenario types, a combination of downlink channel rate and uplink channel rate required for the PON network to work in the scenario type is determined to transmit service data required by the corresponding scenario.

2. The network architecture according to claim 1, characterized in that: Based on different scenario types, after determining the combination of downstream channel rate and upstream channel rate required for the PON network to work in the scenario type, at least one of the following actions is performed: ONU discovery, registration and service forwarding, ONU operation and maintenance management, time and clock transfer.

3. The network architecture according to claim 2, characterized in that: The size of the ONU discovered during windowing is configured according to the scenario requirements.

4. The network architecture according to claim 1, characterized in that: Different uplink and downlink channels use the same or different optical signal encoding; wherein the optical signal encoding mode includes at least one of the following: NRZ, PAM, duobinary; wherein the PAM includes at least one of the following: PAM4, PAM8.

5. The network architecture according to claim 1, characterized in that: Based on different scenario types, a combination of downstream channel rate and upstream channel rate required for the PON network to work in the scenario type is determined, and when transmitting service data required by the corresponding scenario, bandwidth allocation during data transmission is determined; wherein the bandwidth allocation strategy includes at least one of the following: fixed bandwidth allocation, dynamic bandwidth allocation.

6. The network architecture according to claim 1, characterized in that: Based on the first scenario type, determining that an uplink rate corresponding to the first scenario type is less than a downlink rate; Based on the second scenario type, determining that an uplink rate corresponding to the second scenario type is equal to a downlink rate; Based on the third scenario type, it is determined that an uplink rate corresponding to the third scenario type is greater than a downlink rate.

7. The network architecture according to claim 6, characterized in that: The first scene type includes at least one of the following: watching a video, listening to music, downloading a file; The second scenario type includes at least one of the following: playing games, video calls; The third scene type includes at least one of the following: vehicle-mounted camera monitoring, vehicle-mounted radar monitoring, and video monitoring.

8. The network architecture according to claim 1, characterized in that: The interface, message or protocol types supported by the PON network include at least one of the following: mobile industry processor interface MIPI, camera serial interface CSI, display interface DSI, DP interface, embedded display port EDP, IP message, Ethernet message, I2C protocol, CAN bus protocol, LIN protocol.

9. The network architecture according to claim 1, characterized in that: The OLT locally generates a first clock or time, and / or the OLT obtains a second clock or time from an external network via a wireless or wired connection and transmits the second clock or time to the ONU via the PON port; The ONU obtains a first clock or time, and / or a second clock or time; The PON network is a deterministic network, that is, based on the clock or time obtained by the OLT and the ONU, the residence time of the message inside the OLT and the ONU is adjusted to achieve deterministic forwarding.

10. The network architecture according to claim 9, characterized in that: The ONU obtains the first clock or time, and / or, after the second clock or time, outputs a synchronization control signal to the sensor connected to the ONU to control the start time of the sensor uploading data.

11. The network architecture according to claim 10, characterized in that: The PON port of an OLT is connected to one or more ONUs, and the sensors connected to the one or more ONUs are controlled to work synchronously through the synchronous control signal, so as to synchronously transmit the data collected by the sensors to the OLT.

12. The network architecture according to claim 11, characterized in that: The sensors are deployed in the entire space, and the computing unit connected to the OLT acquires the information transmitted by the sensors in a synchronous manner.

13. The network architecture according to claim 9, characterized in that: After the ONU obtains the first clock or time, and / or the second clock or time, based on the obtained clock or time, controls the residence time of the message sent by the ONU to the downstream device inside the ONU; The OLT generates a first clock or time locally, and / or the OLT obtains a second clock or time from an external network via a wireless or wired connection, and controls the residence time of a message sent from an uplink interface of the OLT in the OLT.

14. The network architecture according to claim 1, characterized in that: The PON network is used in at least one of the following scenarios: an industrial control scenario and an in-vehicle scenario.

15. A working system of a flexible rate PON applied to a PON network architecture, wherein the upstream channel rate and the downstream channel rate are the same or different, and the passive optical network PON comprises three parts: an optical line terminal OLT, a passive optical distribution network ODN and an optical network unit ONU, characterized in that: include The downstream channel of the PON port is one or more channels, each channel has the same or different rates, and the upstream channel is one or more channels, each channel has the same or different rates, and the downstream channels and upstream channels of different or same rates are arbitrarily combined on the PON port of the PON network; wherein the PON port is at least provided on the OLT and the ONU; Based on different scenario types, a combination of downlink channel rate and uplink channel rate required for the PON network to work in the scenario type is determined to transmit service data required by the corresponding scenario.

16. A device for flexible rate PON applied to PON network architecture, characterized in that: include: Coding module, configuration module, scene rate adaptation transmission module; The encoding module is connected to the scene rate adaptation transmission module through the configuration module; The encoding module is used to use the same or different encoding for the uplink channel and the same or different encoding for the downlink channel. The configuration module includes one or more downstream channels of the PON port, and the rates of each channel are the same or different; the upstream channels of the PON port include one or more upstream channels, and the rates of each channel are the same or different, wherein the PON port is at least arranged in the OLT and the ONU; The scenario rate adaptation transmission module is used to determine the combination of downlink channel rate and uplink channel rate required for the PON network to work in the scenario type based on different scenario types, and transmit the service data required by the corresponding scenario.

17. The device according to claim 16, characterized in that Also includes: Bandwidth allocation module; the bandwidth allocation module is located in the scene rate adaptation transmission module; The bandwidth allocation module is located in the OLT and is used to detect the bandwidth utilization of the ONU or the bandwidth demand actively reported by the ONU, and dynamically calculate and allocate the bandwidth in combination with the ONU service type attributes configured by the OLT; it is also used to configure the upstream bandwidth for each ONU at the OLT, and the OLT authorizes the ONU to obtain the corresponding OLT upstream bandwidth according to the configuration.

18. The device according to claim 16, characterized in that Also includes: Time and clock synchronization module; the time and clock synchronization module is located in the scene rate adaptation transmission module; The time and clock synchronization module is used to be set in the OLT and the ONU, the OLT works in the master mode and the ONU works in the slave mode, wherein the time and / or clock synchronization is achieved between the OLT and the ONU through one of the following information: delivery time, frame header position.

19. The device according to claim 16, characterized in that Also includes: Deterministic message forwarding control module; the deterministic message forwarding control module is located in the scenario rate adaptation transmission module; The deterministic message forwarding control module is used to adjust the message residence time inside the OLT and ONU when the OLT and ONU send messages outward after the OLT and ONU have the same time information stored inside through time synchronization, so as to achieve deterministic forwarding.

20. The device according to claim 16, characterized in that Also includes: Protocol conversion module, PON network correct transmission control module; the protocol conversion module and the PON network correct transmission control module are located in the scene rate adaptation transmission module; The protocol conversion module is used to map one of the following protocols to the PON port: MIPI, I2C, CAN, LIN; The PON network correct transmission control module is used to achieve correct transmission through one of the following means: PON supports retransmission, PON network supports protection, and GEM frame adds CRC check.

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