Communication method and related device

Abstract

Embodiments of the present application provide a communication method and a related device, capable of, when optical transceiver options supported by an optical network terminal device match optical transceiver options supported by an optical line terminal device, achieving the objective of registering the optical network terminal device to the optical line terminal device, thus improving the reliability of an uplink optical signal sent by the optical network terminal device to the optical line terminal device. The method comprises: firstly, an optical network terminal device receives a downlink frame from an optical line terminal device, wherein the downlink frame carries first indication information, and the first indication information is used for indicating the performance of a first optical transceiver comprised in the optical line terminal device; secondly, the optical network terminal device sends an uplink frame to the optical line terminal device, wherein the uplink frame carries a device identifier of the optical network terminal device and second indication information, and the second indication information is used for indicating a second optical transceiver option.

Description

A communication method and related equipment

[0001] This application claims priority to the Chinese patent application filed with the State Intellectual Property Office on March 1, 2024, with application number CN202410238924.9 and invention name “A communication method and related equipment”, and claims priority to the Chinese patent application filed with the State Intellectual Property Office on April 4, 2024, with application number CN202410405156.1 and invention name “A communication method and related equipment”, the entire contents of which are incorporated by reference into this application. Technical Field

[0002] The present application relates to the field of optical communication technology, and in particular to a communication method and related equipment. Background Art

[0003] Broadband access technology has developed rapidly in recent years, with passive optical networks (PON) experiencing widespread adoption and rapid expansion. With the rapid increase in user data demand, 10 Gigabit (G) PON has entered the large-scale deployment phase, and next-generation PON system standards (such as 50G PON and higher speeds) are being gradually developed and refined.

[0004] PON specifically includes optical network central office equipment and optical network terminal equipment. The next-generation PON system standard defines multiple independent optical transceiver options for the same optical path loss class (ODN class). For example, for optical path loss class N1, optical transceiver option N1 and optical transceiver option N1b are specifically defined. For optical link loss class C+, optical transceiver option C+ and optical transceiver option C+b are specifically defined. Each optical transceiver option defines performance characteristics such as the transmit power of the optical transceiver included in the optical network terminal equipment and the receive sensitivity of the optical transceiver included in the optical network central office equipment.

[0005] However, in existing solutions, at the same optical link loss level, the optical transceiver options supported by the optical transceiver of the optical network central office equipment do not match the optical transceiver options supported by the optical network terminal equipment, reducing the reliability of optical signal transmission from the optical network terminal equipment to the optical network central office equipment. Summary of the Invention

[0006] The embodiments of the present application provide a communication method and related equipment, which can achieve the purpose of registering an optical network terminal device to an optical network central office device when the optical transceiver options supported by the optical network terminal device match the optical transceiver options supported by the optical network central office device, thereby improving the reliability of the optical network terminal device sending uplink optical signals to the optical network central office device.

[0007] In a first aspect, an embodiment of the present application provides a communication method, the method comprising: first, an optical network terminal device receives a downlink frame from an optical network central office device, the downlink frame carrying first indication information, the first indication information being used to indicate a first optical transceiver option, and the first optical transceiver option being used to indicate the performance of the first optical transceiver. Secondly, the optical network terminal device sends an uplink frame to the optical network central office device, the uplink frame carrying the device identification of the optical network terminal device and second indication information, the second indication information being used to indicate a second optical transceiver option, and the second optical transceiver option being used to indicate the performance of the second optical transceiver. Optionally, the uplink frame containing the second indication information may be an uplink frame used by the optical network terminal device for registration. Based on the negotiation process between the optical network central office device and the optical network terminal device, the optical network central office device can obtain the second optical transceiver option of the optical network terminal device, and the optical network terminal device can also obtain the first optical transceiver option of the optical network central office device, thereby facilitating the operation and maintenance of the optical network.

[0008] As shown in this aspect, the optical network terminal device sends an uplink frame containing second indication information to the optical network central office device to implement negotiation between the second optical transceiver option supported by the optical network terminal device and the first optical transceiver option supported by the optical network central office device, thereby improving the reliability of the optical network terminal device sending uplink optical signals to the optical network central office device.

[0009] Based on the first aspect, in an optional implementation, the first optical transceiver option matches the second optical transceiver option. The matching of the first optical transceiver option and the second optical transceiver option may refer to any one of the following examples: Example 1, the first optical transceiver option is optical transceiver option N1, and the optical transceiver options supported by the second optical transceiver are the optical transceiver options N1 and / or N1b. Example 2, the first optical transceiver option and the optical transceiver options supported by the second optical transceiver are respectively the optical transceiver option N1b. Example 3, the first optical transceiver option is optical transceiver option C+, and the optical transceiver options supported by the second optical transceiver are the optical transceiver options C+ and / or C+b. Example 4, the first optical transceiver option and the optical transceiver options supported by the second optical transceiver are respectively the optical transceiver option C+b.

[0010] Based on the first aspect, in an optional implementation manner, when the first optical transceiver option matches the second optical transceiver option, an uplink frame is sent to the optical network central office device.

[0011] According to this aspect, upon determining that the second optical transceiver option supported by the optical network terminal device matches the first optical transceiver option supported by the optical network central office device, the optical network terminal device sends an uplink frame for registration to the optical network central office device, thereby achieving the purpose of registering the optical network terminal device with the optical network central office device and improving the reliability of the uplink optical signal sent by the optical network terminal device to the optical network central office device. For example, when the first optical transceiver option and the second optical transceiver option are matched, the receiving sensitivity of the first optical transceiver (indicated by the first optical transceiver option) can successfully receive the optical power (indicated by the second optical transceiver option) from the second optical transceiver. Therefore, the reliability of uplink optical signal transmission can be effectively guaranteed.

[0012] Based on the first aspect, in an optional implementation, the optical network terminal device is configured with a fifth optical transceiver option, the first optical transceiver option does not match the fifth optical transceiver option, and after the optical network terminal device receives a downlink frame from the optical network central office device, the method further includes: the optical network terminal device changing the fifth optical transceiver option to the second optical transceiver option, and the first optical transceiver option matches the second optical transceiver option. Using this implementation, if the first optical transceiver option does not match the fifth optical transceiver option configured for the second optical transceiver, the optical network terminal device changes the configured fifth optical transceiver option to the second optical transceiver option to ensure that the performance of the first optical transceiver matches that of the second optical transceiver, thereby improving the reliability of uplink optical signal transmission.

[0013] Based on the first aspect, in an optional implementation, if the first optical transceiver option does not match the second optical transceiver option, the optical network terminal device attempts to register by sending an uplink frame, thereby improving registration efficiency.

[0014] Based on the first aspect, in an optional implementation, the uplink frame further carries information indicating that the first optical transceiver option and the second optical transceiver option do not match. In this implementation, if the first optical transceiver option and the second optical transceiver option do not match, the optical network terminal device sends the information indicating that the first optical transceiver option and the second optical transceiver option do not match to the optical network central office device, thereby enabling negotiation between the optical network central office device and the optical network terminal device regarding whether the optical transceiver options match.

[0015] Based on the first aspect, in an optional implementation, the matching of the first optical transceiver option and the second optical transceiver option means that the first optical transceiver option is optical transceiver option N1, and the second optical transceiver option is optical transceiver option N1 and / or optical transceiver option N1b, or the first optical transceiver option and the second optical transceiver option are both optical transceiver option N1b. This implementation ensures that the first optical transceiver option and the second optical transceiver option are in a matching state, thereby ensuring that the performance of the first optical transceiver matches the performance of the second optical transceiver. Therefore, the transmission of uplink optical signals can effectively ensure the reliability of uplink optical signal transmission and facilitate the operation and maintenance of the optical network.

[0016] Based on the first aspect, in an optional implementation, if the second optical transceiver option is optical transceiver option N1, the minimum average transmit power mapped by the optical transceiver option N1 is 6.8 decibel milliwatts (dBm), the maximum average transmit power mapped by the optical transceiver option N1 is 11.8 dBm, and the target parameter mapped by the optical transceiver option N1 is 4.47 dBm, wherein the target parameter is the transmit optical power calculated by subtracting the transmitter and dispersion eye closure TDEC from the optical modulation amplitude OMA; if the second optical transceiver option is optical transceiver option N1b, the minimum average transmit power mapped by the optical transceiver option N1b is 7.8 dBm, the maximum average transmit power mapped by the optical transceiver option N1b is 11.8 dBm, and the target parameter mapped by the optical transceiver option N1b is 5.47 dBm. By adopting this implementation, the same link budget parameter can be divided into two different optical transceiver options (such as optical transceiver options N1 and N1b), and the second optical transceiver option is one of the two optical transceiver options, so that the optical network terminal equipment can be applied to complex optical networks.

[0017] Based on the first aspect, in an optional implementation, if the first optical transceiver option is optical transceiver option N1, the sensitivity of the optical transceiver option N1 at the bit error rate reference level mapped is -22.7 dBm, the sensitivity of the optical modulation amplitude at the bit error rate reference level mapped is -22.53 dBm, and the overload at the bit error rate reference level mapped is -2.2 dBm; if the first optical transceiver option is optical transceiver option N1b, the sensitivity of the optical modulation amplitude at the bit error rate reference level mapped is -21.7 dBm, the sensitivity of the optical modulation amplitude at the bit error rate reference level mapped is -21.53 dBm, and the overload at the bit error rate reference level mapped is -2.2 dBm. By adopting this implementation, the same link budget parameter can be divided into two different optical transceiver options (such as optical transceiver options N1 and N1b). The first optical transceiver option is one of the two optical transceiver options, so that the optical network central office device can be applied to complex optical networks.

[0018] Based on the first aspect, in an optional implementation, the matching of the first optical transceiver option and the second optical transceiver option means that the first optical transceiver option is optical transceiver option C+, and the second optical transceiver option is the optical transceiver option C+ and / or optical transceiver option C+b, or the first optical transceiver option and the second optical transceiver option are both optical transceiver option C+b. This implementation ensures that the first optical transceiver option and the second optical transceiver option are matched, thereby ensuring that the performance of the first optical transceiver matches that of the second optical transceiver. Therefore, the transmission of uplink optical signals can effectively ensure the reliability of uplink optical signal transmission and facilitate the operation and maintenance of the optical network.

[0019] Based on the first aspect, in an optional implementation, if the second optical transceiver option is optical transceiver option C+, the minimum average transmit power mapped by the optical transceiver option C+ is 6.8 dBm, the maximum average transmit power mapped by the optical transceiver option C+ is 11.8 dBm, and the target parameter mapped by the optical transceiver option C+ is 4.47 dBm, wherein the target parameter is the transmit optical power calculated by subtracting the transmitter and dispersion eye closure TDEC from the optical modulation amplitude OMA; if the second optical transceiver option is optical transceiver option C+b, the minimum average transmit power mapped by the optical transceiver option C+b is 7.8 dBm, the maximum average transmit power mapped by the optical transceiver option C+b is 11.8 dBm, and the target parameter mapped by the optical transceiver option C+b is 5.47 dBm. By adopting this implementation, the same link budget parameter can be divided into two different optical transceiver options (such as optical transceiver options C+ and C+b), and the second optical transceiver option is one of the two optical transceiver options, so that the optical network terminal equipment can be applied to complex optical networks.

[0020] Based on the first aspect, in an optional implementation, if the first optical transceiver option is optical transceiver option C+, the sensitivity of the optical transceiver option C+ at the bit error rate reference level mapped is -25.7 dBm, the sensitivity of the optical modulation amplitude at the bit error rate reference level mapped is -25.53, and the overload at the bit error rate reference level mapped is -5.2 dBm; if the first optical transceiver option is optical transceiver option C+b, the sensitivity of the optical modulation amplitude at the bit error rate reference level mapped is -24.7 dBm, the sensitivity of the optical modulation amplitude at the bit error rate reference level mapped is -24.53 dBm, and the overload at the bit error rate reference level mapped is -5.2 dBm. By adopting this implementation method, the same link budget parameters can be divided into two different optical transceiver options (such as optical transceiver options C+ and C+b). The first optical transceiver option is one of the two optical transceiver options, so that the optical network central office equipment can be applied to complex optical networks.

[0021] Based on the first aspect, in an optional implementation, the serial number Serial_Number message included in the uplink frame is used to carry the second indication information. If the second indication information has a first value, it is used to indicate that the second optical transceiver option is optical transceiver option N1 or C+; if the second indication information has a second value, it is used to indicate that the second optical transceiver option is optical transceiver option N1b or C+b. In this implementation, indicating the second optical transceiver option based on the Serial_Number message can ensure that the second optical transceiver option is successfully indicated to the optical network central office device.

[0022] Based on the first aspect, in an optional implementation, the second indication information is the 5th or 6th bit from the highest order in the 40th byte of the Serial_Number message, the first value is 0, and the second value is 1. Indicating the second optical transceiver option based on the Serial_Number message can ensure that the second optical transceiver option is successfully indicated to the optical network central office device.

[0023] Based on the first aspect, in an optional implementation, the second indication information is also used to indicate a third optical transceiver option, the third optical transceiver option is used to indicate the performance of the second optical transceiver, the second optical transceiver option is different from the third optical transceiver option, the second optical transceiver option and the third optical transceiver option correspond to the same optical link loss level, and after the optical network terminal device sends an uplink frame to the optical network central office device, the method further includes: the optical network terminal receives an activation message from the optical network central office device, the activation message is used to indicate one of the second optical transceiver option and the third optical transceiver option. Using this implementation, the optical network central office device supports multiple optical transceiver options under the same link budget parameters, and the optical network terminal device also supports multiple optical transceiver options under the same link budget parameters. The optical network central office device can directly indicate the optical transceiver option on which the optical network terminal device works through an activation message, so that the optical network terminal device can clearly know which optical transceiver option is used to transmit the uplink optical signal among the multiple optical transceiver options supported, thereby ensuring the reliability of the uplink optical signal transmission and reducing the efficiency of the optical network central office device configuring the optical transceiver option on which the first optical transceiver works and the optical network terminal device configuring the optical transceiver option on which the second optical transceiver works.

[0024] Based on the first aspect, in an optional implementation, the activation message is an Assign ONU_ID message for assigning an optical network terminal equipment identifier, and the Assign ONU_ID message carries a target bit, which is the 6th bit from the high bit to the low bit in the 15th byte of the Assign ONU_ID message. If the target bit value is 0, it is used to indicate that the optical transceiver option is N1 or C+; if the target bit value is 1, it is used to indicate that the optical transceiver option is N1b or C+b.

[0025] Based on the first aspect, in an optional implementation, the optical network terminal device is an optical network terminal ONT or an optical network unit ONU, the optical network central office device is an optical line terminal OLT, or the optical network central office device is a master device and the optical network terminal device is a slave device.

[0026] Based on the first aspect, in an optional implementation manner, the device identifier of the optical network terminal device is a serial number.

[0027] In the second aspect, an embodiment of the present application provides a communication method, the method comprising: an optical network central office device sends a downlink frame to an optical network terminal device, the downlink frame carries first indication information, the first indication information is used to indicate a first optical transceiver option, and the first optical transceiver option is used to indicate the performance of the first optical transceiver included in the optical network central office device; the optical network central office device receives an uplink frame from the optical network terminal device, the uplink frame carries a device identification of the optical network terminal device and second indication information, the second indication information is used to indicate a second optical transceiver option, and the second optical transceiver option is used to indicate the performance of the second optical transceiver included in the optical network terminal device. For a description of the beneficial effects of this aspect, please refer to the first aspect, and no further details will be given.

[0028] Based on the second aspect, in an optional implementation manner, the uplink frame carries second indication information, and the second indication information is used to indicate the second optical transceiver option.

[0029] Based on the second aspect, in an optional implementation method, the optical distribution network class ODN class field included in the downlink frame is used to carry the first indication information. When the first indication information takes a third value, it is used to indicate that the first optical transceiver option is N1. When the first indication information takes a fourth value, it is used to indicate that the first optical transceiver option is N1b. When the first indication information takes a fifth value, it is used to indicate that the first optical transceiver option is C+. When the ODN class field takes a sixth value, it is used to indicate that the first optical transceiver option is C+b.

[0030] Based on the second aspect, in an optional implementation, the third value is 000, the fourth value is 101, the fifth value is 100, and the sixth value is 110.

[0031] Based on the second aspect, in an optional implementation, the configuration capability burst profile message included in the downlink frame is used to carry the first indication information, where the first indication information is used to indicate that the first optical transceiver option is N1 or N1b, or the first indication information is used to indicate that the first optical transceiver option is C+ or C+b.

[0032] Based on the second aspect, in an optional implementation, when the value of the first indication information is 0, it is used to indicate optical transceiver option N1 or optical transceiver option C+; when the value of the first indication information is 1, it is used to indicate optical transceiver option N1b or optical transceiver option C+b, and the first indication information is the 4th bit from the high bit to the low bit in the 5th byte of the burst profile message, or the first indication information is the 5th or 6th bit from the high bit to the low bit in the 6th byte of the burst profile message.

[0033] Based on the second aspect, in an optional implementation, the first indication information is further used to indicate a fourth optical transceiver option, the fourth optical transceiver option is used to indicate the performance of the first optical transceiver, the first optical transceiver option is different from the fourth optical transceiver option, and the first optical transceiver option and the fourth optical transceiver option correspond to the same optical link loss level.

[0034] Based on the second aspect, in an optional implementation, the second indication information is also used to indicate a third optical transceiver option, the third optical transceiver option is used to indicate the performance of the second optical transceiver, the second optical transceiver option is different from the third optical transceiver option, the first optical transceiver option and the third optical transceiver option correspond to the same optical link loss level, after the optical network central office device receives the uplink frame from the optical network terminal device, the method further includes: the optical network central office device sends an activation message to the optical network terminal device, the activation message is used to indicate one of the second optical transceiver option and the third optical transceiver option.

[0035] Based on the second aspect, in an optional implementation method, the activation message includes second indication information, the activation message is an Assign ONU_ID message for assigning an optical network terminal equipment identifier, and the second indication information is the 6th bit from the high bit to the low bit in the 15th byte of the Assign ONU_ID message. If the value of the second indication information is 0, it is used to indicate that the optical transceiver option is N1 or C+; if the value of the second indication information is 1, it is used to indicate that the optical transceiver option is N1b or C+b.

[0036] In a third aspect, an embodiment of the present application provides a communication device, comprising: a module for executing any method described in the first aspect above, or a module for executing any method described in the second aspect above.

[0037] In a fourth aspect, an embodiment of the present application provides a chip, which includes a processor and a communication interface, wherein the communication interface is used to receive data and transmit it to the processor, or to send data from the processor to another chip, and the processor is used to execute the method as described in any one of the first aspects above, or the method as described in any one of the second aspects above.

[0038] In a fifth aspect, an embodiment of the present application provides a computer-readable storage medium, in which computer instructions are stored. When the computer instructions are run on a computer, the method described in any one of the first aspects above, or the method described in any one of the second aspects above, is executed.

[0039] In a sixth aspect, an embodiment of the present application provides a communication device, comprising an optical transceiver and a processor, wherein the optical transceiver is used to realize the transmission and reception of optical signals, and the processor is used to implement the method described in any one of the first aspect or the second aspect above. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] FIG1 is a structural example diagram of an optical network;

[0041] FIG2 is another structural example diagram of an optical network;

[0042] FIG3a is a flowchart of the steps of the first embodiment of the communication method provided by the present application;

[0043] FIG3 b is a flowchart of the steps of the first embodiment of the communication method provided by the present application;

[0044] FIG4 is a diagram illustrating an exemplary frame structure of a downlink frame according to an embodiment of the present application;

[0045] FIG5 is a diagram illustrating an example frame structure of an embodiment of an uplink frame provided by the present application;

[0046] FIG6 is a flowchart of the steps of a third embodiment of the communication method provided by the present application;

[0047] FIG7 is a schematic block diagram of an embodiment of a communication device provided by the present application;

[0048] FIG8 is a schematic block diagram of another embodiment of a communication device provided by the present application;

[0049] FIG9 is a schematic diagram of an embodiment of a chip system provided by the present application. DETAILED DESCRIPTION

[0050] The following will describe the technical solutions in the embodiments of this application in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0051] Figure 1 is a structural example diagram of an optical network. The registration method and related equipment of the optical network provided in the embodiment of the present application can be applied to a variety of optical networks. For example, the type of the optical network 100 shown in this example is a passive optical network (PON). Then the optical network 100 includes an optical network terminal device 101, an optical distribution network (ODN) 110 and at least one optical network terminal device 102. The optical network terminal device 101 is connected to at least one optical network terminal device 102 through the ODN 110. This example does not limit the number of optical network terminal devices 102 included in the optical network. The ODN 110 includes a passive optical splitter (Splitter), a trunk optical fiber (Feeder) connected between the optical network terminal device 101 and the passive optical splitter, and a branch optical fiber (Drop) connected between the optical network terminal device 102 and the passive optical splitter. The optical network central office (ON) 101 sends optical signals to the optical network terminal (ONT) 102 via the ODN, which is called downlink transmission. The optical network terminal (ONT) 102 sends optical signals to the OON 101 via the ODN, which is called uplink transmission. Specifically, when transmitting downlink data, the ODN 110 transmits the downlink data from the OON 101 to each ONT 102 via an optical splitter. When transmitting uplink data, the ODN 110 combines multiple uplink data channels from multiple ONTs 102 into one optical signal using time division multiplexing (TDM). This signal is then sent to the OON 101. Each ONT 102 transmits the data in the order specified by the OON 101, thus avoiding conflicts between the ONTs 102.

[0052] The optical network terminal device 102 shown in this example can be an optical network unit (ONU) or an optical network terminal (ONT), and the optical network central office device 101 is an optical line terminal (OLT). The optical network central office device 101 is connected to the upper-layer network side equipment (such as switches, routers, etc.). The optical network terminal device 102 can be connected to the user side equipment. For example, the optical network terminal device 102 provides an Ethernet user port or a plain old telephone service (POTS) user port to connect to the user side equipment. It should be clear that the description of the optical network type shown in Figure 1 is an optional example and is not limiting. For example, the optical network can also be applied to the optical transport network (OTN), then the optical network central office device 101 and the optical network terminal device 102 are both OTN devices. If the optical network 100 is applied to a wireless mesh network (Mesh), it is also called a multi-hop network. The Mesh includes multiple transmission devices with Mesh functions. The optical network central office device 101 and the optical network terminal device 102 are any two connected devices among a plurality of transmission devices. The optical network 100 shown in this example can also be applied to any one or more combinations of a data center network (DCN), a metropolitan area network (MAN), an optical access network (OAN), a metropolitan area network (MAN), a synchronous digital hierarchy (SDH), a Gigabit-PON (GPON), an Ethernet passive optical network (EPON), an evolved 10-Gigabit-capable symmetric passive optical network (XGS-PON), Ethernet, or a flexible Ethernet (FlexE), a wavelength division multiplexing (WDM) network, etc., without limitation. The method shown in this embodiment takes application to 50G PON as an example.

[0053] Taking optical network terminal device 102 as an example, this example does not limit the device type of optical network terminal device 102. Depending on the application scenario of the optical network, the device type of optical network terminal device 102 may also vary. For example, optical network terminal device 102 may be an optical transmission device, an optical access device, a router, a switch, a wireless base station, a wireless remote access device, a wireless baseband signal processing device, etc. It may also be a computing server (often referred to as a server), a high-performance computer (HPC), a storage server, or a memory resource pool. This example does not limit the type of optical network terminal device 102, as long as the optical network terminal device 102 has electrical-to-optical conversion capabilities and an optical interface capable of connecting to an optical fiber. For a description of the type of optical network central office device 101, please refer to the description of optical network terminal device 102, and the details are not repeated here.

[0054] Take the optical network terminal device as an example. The optical network terminal device 102 includes a device board 111 and one or more optical transceivers 112. Among them, the optical transceiver can also be referred to as an optoelectronic conversion module, an optical transceiver module or an optical module, etc. This example does not limit the type and packaging form of the optical transceiver. The packaging form of the optical transceiver can be an optical transceiver board (OTB), a near package optical module (NPO), an on-board optical module (OBO) based on optical input and output interface (OIO) technology, or a co-package optical module (CPO), etc. The optical transceiver described in this application can be a device that combines transceiver and receiver, or a device that is only responsible for receiving optical signals, or a device that is only responsible for sending optical signals. This example does not limit the number of device boards 111 included in the optical network terminal device 102. The device board 111 is integrated with the optical network terminal device 102, or the device board 111 is an independent pluggable board. This example does not limit the number of optical transceivers 112 included in the optical network terminal device 102. The optical transceiver 112 can be integrated with the device board 111 or pluggable on the device board 111, etc., without specific limitation. Specifically, the device board 111 has a packaged processor and a connector, which is used to connect the processor and the optical transceiver 112. The processor can be one or more chips, or one or more integrated circuits. For example, the processor can be one or more optical digital signal processors (oDSPs), digital signal processors (DSPs), field-programmable gate arrays (FPGAs), application-specific integrated circuits (ASICs), system-on-chips (SoCs), central processing units (CPUs), network processors (NPs), microcontroller units (MCUs), programmable logic devices (PLDs), network interface chips, storage interface chips, or other integrated chips, or any combination of the above chips or processing modules, etc., and the details are not detailed here. The processor has a transmission interface connected to the connector.The connector is used to provide an electrical interface that realizes a pluggable electrical connection with the optical transceiver 112. The optical network central office device 101 includes a device board and one or more optical transceivers. For details, please refer to the description of the optical network terminal device 102.

[0055] Fiber to the home (FTTH) is a fiber-optic communication transmission method. The access network portion of the aforementioned optical network can be used to achieve a wider coverage area through FTTH. In addition, fiber to the office (FTTO) and fiber to the building (FTTB) are also proposed as equivalent or similar communication transmission methods, which can also be application architectures of the method provided in this application. The example shown in Figure 1 is based on FTTH for illustrative purposes.

[0056] Building on FTTH, to address wireless fidelity (Wi-Fi) coverage issues in home networks, optical fiber can be extended further into residents' rooms. Optical terminals providing Wi-Fi access are installed inside the rooms, shortening the distance between the user terminal and the Wi-Fi access point and improving signal quality. This application scenario is called fiber to the room (FTTR).

[0057] Figure 2 illustrates another example of an optical network structure. Specifically, it illustrates the FTTR system architecture. FTTR and FTTH networks can be viewed as cascaded PON systems. The OLT in FTTH is deployed in the central office (CO), while the ONU is deployed in a home's information box. The master device in the FTTR can replace the ONU in FTTH. In FTTR scenarios, this master device performs similar functions to the OLT in FTTH scenarios, and can also perform similar functions to the ONU in FTTH scenarios. In other words, the master device in the FTTR combines the functions of both the OLT and ONU, serving as a network device that connects FTTH and FTTR. The slave devices in the FTTR can be deployed in each room of the home, connecting to user terminals (stations). These slave devices are essentially similar network devices to the ONUs in FTTH. The slave gateway in the FTTR accesses each room, and this slave gateway can also function as an access point (AP), enabling direct Wi-Fi connections to user terminals. The user terminal can be connected to the slave device and perform data transmission through the WiFi connection established between the user terminal and the slave device.

[0058] It should be understood that multiple slave devices can be deployed in the FTTR, and each slave device is connected to the corresponding downlink port on the master device. The master device can achieve unified management and configuration of all slave devices. It should be noted that the master device can also be referred to as the "master gateway", "master optical modem" or "master FTTR device", etc., and the slave device can also be referred to as the "slave gateway", "slave optical modem" or "slave FTTR device", etc. This application does not limit their specific names. The optical network terminal device shown in Figure 1 can also be a master device under the FTTR architecture, and the optical network terminal device shown in Figure 1 can also be a slave device under the FTTR architecture.

[0059] Combined with the architecture of Figure 2 above, in some scenarios, when the slave device in the FTTR provides services to the user terminal, the data transmission method of the user terminal accessing the slave device may be different from the data transmission method of the devices in FTTH and FTTR. For example, communication within the FTTH or FTTR is carried out through optical fiber, while communication between the slave device and the terminal can be carried out through a wireless network, which may include but is not limited to WiFi, near field communication (NFC), infrared, Bluetooth or ZigBee, etc.

[0060] It is understandable that FIG1 and FIG2 are only schematic diagrams, and the optical network may also include other devices, such as wavelength division equipment, optical amplifier equipment, and more optical network terminal equipment, which are not shown in FIG1 and FIG2.

[0061] The following is an introduction to the method flow provided by the embodiment of the present application based on the aforementioned optical network architecture. The following takes the optical network central office device as the OLT and the optical network terminal device as the ONU as an example to illustrate the method shown in the embodiment of the present application. In the following method embodiment, the OLT can be replaced by a component of the OLT (such as a chip or circuit), and the ONU can be replaced by a component of the ONU (such as a chip or circuit). It should be clarified that the master device shown in Figure 2 can replace the OLT, and the slave device shown in Figure 2 can replace the ONU to execute the method flow shown below.

[0062] In order to facilitate a better understanding of the technical solution of the present application, a brief introduction is given to the ONU activation mechanism related technologies involved in the technical solution of the present application.

[0063] The ONU activation process consists of three steps: parameter learning, serial number acquisition, and ranging. Specifically, during the parameter learning step, the ONU remains passive and acquires operating parameters for uplink transmission. During the serial number acquisition step, the OLT discovers the new ONU by its serial number and assigns it an ONU ID. During the ranging step, after receiving the ONU's ranging response message, the OLT calculates the ONU's loop delay (rONUd trip delay, RTD) based on the ranging request message's transmission time and the ranging response message's arrival time. It then calculates the ONU's equalization delay (EQD) based on the ranging request message's transmission time, the ranging response message's arrival time, the ONU's response processing time, and the system's baseline equalization delay. This equalization delay is then sent to the ONU. The entire ONU activation process can be divided into several different states. One possible implementation is to divide it into seven states: Initial state (also known as state O1); Standby state (also known as state O2); Serial Number state (also known as state O3); Ranging state (also known as state O4); Operation state (also known as state O5); Popup state (also known as state O6); and Emergency Stop state (also known as state O7). It should be noted that the ONU activation process can also be called the ONU registration process. The ONU completes registration with the OLT by executing each step of the activation process.

[0064] If the optical transceiver options supported by the optical transceiver included in the OLT do not match the optical transceiver options supported by the optical transceiver included in the ONU, the reliability of the ONU sending upstream data to the OLT may be reduced. In view of this problem, an embodiment of the present application proposes a communication method that can be applied to the ONU activation process. When the optical transceiver options supported by the optical transceiver included in the OLT match the optical transceiver options supported by the optical transceiver included in the ONU, the reliability of the ONU sending upstream data to the OLT is improved, thereby ensuring the performance of the optical network.

[0065] FIG3 a is a flowchart of the steps of the first embodiment of the communication method provided in this application.

[0066] Step 301: The OLT sends a downlink frame to the ONU.

[0067] The OLT sends a downlink frame to the ONU, and the downlink frame carries first indication information, and the first indication information is used to indicate the first optical transceiver option of the OLT. The first optical transceiver option is used to indicate the performance of the first optical transceiver, for example, the first optical transceiver option is used to indicate the minimum average transmission power, the maximum average transmission power, the transmission optical power calculated by subtracting the transmitter and dispersion eye closure (TDEC) from the modulation amplitude (OMA) of the optical signal, the self-luminous power of the optical transceiver when there is no input, the maximum time or minimum extinction ratio that the optical transceiver is allowed to be in the on state, etc., without specific limitation. This embodiment does not limit the specific type of the first optical transceiver option, as long as the first optical transceiver option is used to indicate the relevant performance of the first optical transceiver for sending uplink optical signals.

[0068] Optionally, the OLT broadcasts the downlink frame to discover unregistered ONUs. The downlink frame indicates an authorization time, instructing the ONU to be activated to send an uplink frame to the OLT during the time window corresponding to the authorization time to report the ONU's device information. The downlink frame also carries first indication information indicating a first optical transceiver option. The first optical transceiver option is an optical transceiver option supported by a first optical transceiver included in the OLT.

[0069] The first optical transceiver option corresponds to a specific optical link loss level. For example, the first optical transceiver option is an option included in optical link loss level N1 (e.g., optical transceiver option N1 or N1b). In another example, the first optical transceiver option is an option included in optical link loss level C+ (e.g., optical transceiver option C+ or C+b).

[0070] The optical link loss level N1 and the optical link loss level C+ are described in conjunction with Table 1:

[0071] Table 1

[0072] For example, for optical link loss level N1, the minimum link loss is 14dB and the maximum link loss is 29dB. For optical link loss level C+, the minimum link loss is 17dB and the maximum link loss is 32dB.

[0073] The first indication information carried by the downlink frame described in this embodiment is used to indicate the first optical transceiver option. There may be many specific implementation methods for the downlink frame, which is not limited in this application. Several possible implementation methods are provided below.

[0074] Option 1

[0075] The structure of the downlink frame shown in this method can be seen in Figure 4, which is an example diagram of the frame structure of an embodiment of the downlink frame provided by this application. The downlink frame 400 includes a physical synchronization block (PSBd) and a physical layer frame payload (PHY frame payload). The PSBd includes a physical synchronization (PSync) field, a superframe counter (SFC) field, and an operation control (OC) structure field. Among them, the PHY frame payload includes an FS frame header (Header) and an FS payload. The FS Header specifically includes a length end mark (HLend), a bandwidth map (BWmap) field, and a physical layer operation, administration, and maintenance downstream (PLOAMd) field. The BWmap field includes time slot scheduling information, which is used to indicate the authorization time or time slot information. The ONU reports the sequence number or service data to the OLT according to the indicated authorization time. The OC structure field includes the OC data body field and the header error control (HEC) field. The OC body field includes the payload information table (PIT) field, the passive optical network-identifier (PON-ID) field, the reserved field (R), the transmit optical level reference point indicator (c) field, and the transmit optical level (TOL). The PIT field specifically includes the RE flag field, the optical distribution network optical path loss class (ODN class) field, the downstream forward error correction (DS FEC) field, the P flag (P) field, and the physical layer link type field.Among them, the ODN class field is used to indicate the optical transceiver option, that is, to identify the nominal optical parameters of the optical transceiver. The ODN class field can be used to carry the first indication information described in this embodiment. The value of the first indication information is used to indicate the first optical transceiver option. When the value of the first indication information is the third value, it is used to indicate that the first optical transceiver option is N1; when the value of the first indication information is the fourth value, it is used to indicate that the first optical transceiver option is N1b; when the value of the first indication information is the fifth value, it is used to indicate that the first optical transceiver option is C+; when the value of the first indication information is the sixth value, it is used to indicate that the first optical transceiver option is C+b; any two values ​​among the third value, the fourth value, the fifth value and the sixth value are different from each other.

[0076] For example, referring to Table 2, the ODN class field includes 3 bits as an example:

[0077] Table 2

[0078] As shown in Table 2, if the first optical transceiver option of the OLT is N1, the third value of the first indication information is 000. If the first optical transceiver option of the OLT is N1b, the fourth value of the first indication information is 101. If the first optical transceiver option of the OLT is C+, the fifth value of the first indication information is 100. If the first optical transceiver option of the OLT is C+b, the sixth value of the first indication information is 110.

[0079] Option 2

[0080] The downlink frame shown in this example includes a configuration capability (burst profile) message, and the burst profile message carries first indication information, and the first indication information is used to indicate the first optical transceiver option. The downlink frame also includes an ODN class field (see the corresponding description of Figure 4 for details), and the ODN class field is used to indicate the optical link loss level. For example, the ODN class field is used to indicate the optical link loss level N1, and the first indication information carried by the burst profile message is used to indicate that the first optical transceiver option is N1 or N1b. For another example, the ODN class field is used to indicate the optical link loss level C+, and the first indication information carried by the burst profile message is used to indicate that the first optical transceiver option is C+ or C+b. See the following examples for details:

[0081] The ODN class field is used to indicate the optical link loss level. For details, see Table 3:

[0082] Table 3

[0083] The first indication information carried in the burst profile message can be seen in Table 4:

[0084] Table 4

[0085] For example, the fourth bit from the highest to the lowest bit in the fifth byte of the burst profile message (i.e., the bit R in the bit sequence VVVRBBPP) can be used as the first indication information to indicate the first optical transceiver option. For another example, the fifth bit in the sixth byte of the burst profile message (i.e., the first R in the bit sequence NNMMRRCF) can be used as the first indication information to indicate the first optical transceiver option. For another example, the sixth bit in the sixth byte of the burst profile message (i.e., the second R in the bit sequence NNMMRRCF) can be used as the first indication information to indicate the first optical transceiver option. When the bit used to indicate the first optical transceiver option is 0, it is used to indicate optical transceiver option N1 or optical transceiver option C+; when the bit used to indicate the first optical transceiver option is 1, it is used to indicate optical transceiver option N1b or optical transceiver option C+b. For example, if the OLT wishes to indicate the first optical transceiver option N1b to the ONU, the ODN class field has a value of 000, and the first indication message has a value of 1. Based on the ODN class field value of 000, the ONU determines that the first optical transceiver option corresponds to optical link loss level N1. Then, based on the first indication message value of 1, the ONU determines the corresponding optical transceiver option N1b or C+b. Of the optical transceiver options N1b or C+b, only optical transceiver option N1b corresponds to optical link loss level N1 (i.e., only optical transceiver option N1b is an optical transceiver option under optical link loss level N1). Therefore, the ONU determines that the first optical transceiver option is N1b. Similarly, if the OLT needs to indicate the first optical transceiver option N1 to the ONU, since optical transceiver option N1 corresponds to optical link loss level N1, the ODN class field has a value of 000, and the first indication information carried in the burst profile message has a value of 0. If the OLT needs to indicate to the ONU that the first optical transceiver option is C+, because the optical transceiver option C+ corresponds to the optical link loss level C+, then the value of the ODN class field is 100, and the value of the first indication information carried by the burst profile message is 0. If the OLT needs to indicate to the ONU that the first optical transceiver option is C+b, because the optical transceiver option C+b corresponds to the optical link loss level C+, then the value of the ODN class field is 100, and the value of the first indication information carried by the burst profile message is 1. Those skilled in the art will understand that the above example is only one possible implementation method, and this application does not limit the specific bits and value meanings used to indicate the first optical transceiver option.

[0086] It should be noted that the description of the manner in which the downlink frame carries the first indication information, as well as the description of the values ​​of each field, in this embodiment are all optional examples and are not limiting. As long as the ONU can determine the first optical transceiver option supported by the first optical transceiver based on the first indication information carried by the downlink frame, it can be seen that the first optical transceiver option shown in this embodiment is one of N1, N1b, C+, and C+b. The following describes each first optical transceiver option in detail in conjunction with Table 5.

[0087] Table 5

[0088] As shown in Table 5, the first optical transceiver option of the first optical transceiver is used to indicate the performance of the first optical transceiver. Therefore, different optical transceiver options indicate different performance of the first optical transceiver. The first parameter is sensitivity at a bit error rate reference level (BER reference level). BER is the abbreviation for Bit Error Ratio. The second parameter is optical modulation amplitude sensitivity at a bit error rate reference level (OMA sensitivity at a BER reference level). The third parameter is overload at a bit error rate reference level (BER reference level). As shown in Table 5, the first parameter mapped to the first optical transceiver option N1 is -22.7 dBm, the first parameter mapped to the first optical transceiver option N1b is -21.7 dBm, the second parameter mapped to the first optical transceiver option N1 is -22.53 dBm, the second parameter mapped to the first optical transceiver option N1b is -21.53 dBm, and the third parameters mapped to the first optical transceiver option N1 and the first optical transceiver option N1b are both -2.2 dBm. The first parameter mapped to the first optical transceiver option C+ is -25.7 dBm, the first parameter mapped to the first optical transceiver option C+b is -24.7 dBm, the second parameters mapped to the first optical transceiver option C+ and the first optical transceiver option C+b are -25.53 dBm, and the third parameters mapped to the first optical transceiver option C+ and the first optical transceiver option C+b are both -5.2 dBm.

[0089] Step 302: The ONU sends a first uplink frame to the OLT, reporting an optical transceiver option corresponding to the second optical transceiver of the ONU.

[0090] Optionally, the ONU obtains a second optical transceiver option supported by the second optical transceiver. The second optical transceiver is an optical transceiver included in the ONU. The second optical transceiver options supported by the second optical transceiver shown in this embodiment can be seen in Table 6:

[0091] Table 6

[0092] As shown in Table 6, the second optical transceiver options supported by the second optical transceiver are used to indicate the performance of the second optical transceiver. Therefore, when the second optical transceiver supports different second optical transceiver options, different performances of the second optical transceiver are indicated. If the second optical transceiver option supported by the second optical transceiver is optical transceiver option N1, the minimum average transmit power mapped by optical transceiver option N1 is 6.8 dBm, the maximum average transmit power mapped by optical transceiver option N1 is 11.8 dBm, and the target parameter mapped by optical transceiver option N1 is 4.47 dBm, where the target parameter is the transmit optical power calculated by subtracting TDEC from OMA. If the second optical transceiver supports option N1b, the minimum average transmit power mapped by option N1b is 7.8dBm, the maximum average transmit power mapped by option N1b is 11.8dBm, and the target parameter mapped by option N1b is 5.47dBm. If the second optical transceiver supports option C+, the minimum average transmit power mapped by option C+ is 6.8dBm, the maximum average transmit power mapped by option C+ is 11.8dBm, and the target parameter mapped by option C+ is 4.47dBm. If the second optical transceiver option supported by the second optical transceiver is optical transceiver option C+b, the minimum average transmit power for optical transceiver option C+b mapping is 7.8 dBm, the maximum average transmit power for optical transceiver option C+b mapping is 11.8 dBm, and the target parameter for optical transceiver option C+b mapping is 5.47 dBm. This embodiment does not limit the specific content of the second optical transceiver option. For example, the maximum TDEC for the second optical transceiver options N1, N1b, C+, and C+b mappings supported by the second optical transceiver is 5 dB. The launch optical power without input to the transmitter for the second optical transceiver options N1, N1b, C+, and C+b mappings supported by the second optical transceiver is less than -45 dBm. The maximum Tx enable time for the second optical transceiver options N1, N1b, C+, and C+b mappings supported by the second optical transceiver is approximately 128.6 ns, transmitting 6400 bits. The maximum transmit disable time for the second optical transceiver options N1, N1b, C+, and C+b mapping supported by the second optical transceiver is approximately 128.6 ns for 6400 bits. The minimum extinction ratio for the second optical transceiver options N1, N1b, C+, and C+b mapping supported by the second optical transceiver is 5 dB.

[0093] The second optical transceiver is an optical transceiver included in the ONU. The ONU obtains a first optical transceiver option supported by the OLT according to the first indication information carried in the downlink frame from the OLT.

[0094] Optionally, the ONU may determine whether the first optical transceiver option matches a second optical transceiver option supported by the second optical transceiver. The matching between the first optical transceiver option and the second optical transceiver option includes any of the following examples:

[0095] In Example 1, the first optical transceiver option is optical transceiver option N1, and the second optical transceiver option supported by the second optical transceiver is optical transceiver option N1 and / or N1b.

[0096] Example 2: The first optical transceiver option and the second optical transceiver option supported by the second optical transceiver are both optical transceiver options N1b.

[0097] In Example 3, the first optical transceiver option is optical transceiver option C+, and the second optical transceiver option supported by the second optical transceiver is optical transceiver option C+ and / or C+b.

[0098] In Example 4, the first optical transceiver option and the second optical transceiver option supported by the second optical transceiver are both optical transceiver options C+b.

[0099] When the ONU determines that the first optical transceiver option matches the second optical transceiver option supported by the second optical transceiver, the ONU sends a first upstream frame to the OLT.

[0100] If the ONU determines that the first optical transceiver option does not match the second optical transceiver option supported by the second optical transceiver, the ONU may choose not to send an upstream frame, or may choose to send an upstream frame and report the second optical transceiver option in the upstream frame to attempt to register with the OLT or attempt to communicate data with the OLT. The upstream frame may also carry information indicating that the first optical transceiver option does not match the second optical transceiver option, so that the OLT can determine that the optical transceiver option corresponding to the OLT's first optical transceiver does not match the optical transceiver option corresponding to the ONU's second optical transceiver. If the ONU does not send an upstream frame to the OLT, the ONU may generate a local alarm, for example, through an indicator light, display screen, or speaker on the ONU, or through the ONU's management platform. This alarm enables operation and maintenance personnel to be notified of the mismatch between the first optical transceiver option and the second optical transceiver option supported by the second optical transceiver. When the ONU sends an upstream frame to the OLT, in addition to carrying the optical transceiver option corresponding to the second optical transceiver in the upstream frame, the ONU can also indicate to the OLT that the first optical transceiver option does not match the second optical transceiver option through a field in the upstream frame. For example, bits "1110" in the 40th byte of the Serial_Number_ONU message can be used to indicate that the first optical transceiver option does not match the second optical transceiver option. It should be understood that the message type used in this embodiment to indicate to the ONU that the first optical transceiver option does not match the second optical transceiver option, as well as the description of the specific bytes and bits included in the message, are all optional examples and are not limiting.

[0101] Optionally, the ONU may not determine whether the first optical transceiver option matches the second optical transceiver option supported by the second optical transceiver, and directly send the first uplink frame to the OLT to report the optical transceiver option corresponding to the second optical transceiver of the ONU.

[0102] Optionally, the ONU obtains the authorization time indicated by the downstream frame and sends the first upstream frame to the OLT. The first upstream frame is used to request registration with the OLT. Optionally, the first upstream frame also carries second indication information, which is used to indicate a second optical transceiver option of the second optical transceiver. The second optical transceiver option is an optical transceiver option supported by the second optical transceiver and is used to indicate the performance of the second optical transceiver of the ONU. It is understood that the first optical transceiver option matches the second optical transceiver option.

[0103] For an explanation of the first uplink frame structure, please refer to Figure 5, wherein Figure 5 is an example diagram of a frame structure of an embodiment of an uplink frame provided by the present application. The first uplink frame 500 shown in this embodiment includes an uplink (Upstream) FS header. The FS header includes an ONU-ID field, an indication (Ind) field, a hybrid error control (HEC) field, and an upstream physical layer operation, management, and maintenance (Upstream PLOAM, PLOAMu) field. The PLOAMu field includes at least an ONU serial number (Serial_Number_ONU) message. The ONU serial number shown in this embodiment serves as the device identifier of the ONU. This embodiment takes the Serial_Number_ONU message carrying the second indication information as an example. The following describes how the Serial_Number_ONU message carries the second indication information to indicate the second optical transceiver option.

[0104] The second indication information carried by the Serial_Number_ONU message, when the value is the first value, is used to indicate that the second optical transceiver option is optical transceiver option N1 or optical transceiver option C+; the second indication information carried by the Serial_Number, when the value is the second value, is used to indicate that the second optical transceiver option is optical transceiver option N1b or optical transceiver option C+b.

[0105] The Serial_Number_ONU message can be seen in Table 7:

[0106] Table 7

[0107] As shown in Table 7, the fifth or sixth bit from the highest to lowest bit in the 40th byte of the Serial_Number_ONU message can be used as the second indication information to indicate the second optical transceiver option. The first value is 0, and the second value is 1. It is understood that if the ONU's second optical transceiver option is N1 or C+, the value of the second indication information is 0. If the ONU's second optical transceiver option is N1b or C+b, the value of the second indication information is 1.

[0108] This embodiment does not limit the manner in which the Serial_Number_ONU message indicates the second optical transceiver option, for example, as shown in Table 8:

[0109] Table 8

[0110] The value range of the octet in the 39th byte of the Serial_Number_ONU message may be modified so that the second optical transceiver option is indicated by the bits in the idle state within the value range of the octet.

[0111] The ONU shown in this embodiment, in order to achieve the purpose of registering with the OLT, sends the ONU serial number (SN) to the OLT. This embodiment does not limit the way in which the ONU sends the SN to the OLT. For example, the SN is carried in the Serial_Number_ONU message of the first uplink frame. For another example, the SN is carried in the Serial_Number_ONU physical layer operation, or in the operations, administration and maintenance (OAM) message. It will be understood by those skilled in the art that the above description of the message type used to carry the second indication information and the way in which the message carries the second indication information are one possible implementation method, and this application does not limit the specific bit position and value meaning used to indicate the second optical transceiver option.

[0112] This embodiment does not limit the number of second optical transceiver options supported by the second optical transceiver. If the second optical transceiver supports only one second optical transceiver option (e.g., optical transceiver option N1b), the second optical transceiver is currently configured with the second optical transceiver option (e.g., optical transceiver option N1b). The second optical transceiver of the ONU transmits upstream optical signals to the OLT according to the parameters indicated by the currently configured optical transceiver option (e.g., optical transceiver option N1b). If the second optical transceiver supports multiple second optical transceiver options (e.g., optical transceiver options N1 and N1b), the second optical transceiver is currently configured with one of the multiple second optical transceiver options (e.g., optical transceiver option N1). The second optical transceiver of the ONU transmits upstream optical signals to the OLT according to the parameters indicated by the currently configured optical transceiver option (e.g., optical transceiver option N1). The optical transceiver option corresponding to the second optical transceiver reported by the ONU is used to indicate the optical transceiver option currently configured for the second optical transceiver. Optionally, when the uplink frame sent by the ONU shown in step 302 is a Serial_Number_ONU message for a registration request, the OLT will execute step 303.

[0113] Step 303: The OLT sends a first activation message to the ONU.

[0114] When the OLT receives an SN from an ONU, the OLT determines that the SN is a new SN, that is, the SN has no associated ONU ID, or the OLT has not assigned an ONU ID to the ONU corresponding to the SN. Then the OLT assigns an ONU ID to the ONU and creates a mapping relationship between the SN and the ONU ID.

[0115] OLT sends the first activation message to ONU, and this first activation message carries activation instruction information and this ONU ID, and this activation instruction information is used to indicate that OLT successfully distributes ONU ID for this ONU.Specifically, after OLT distributes this ONU ID for ONU, this ONU ID and activation instruction information are sent by the first activation message.This first activation message also includes this SN, and this SN carried in the first activation message is used to indicate that OLT has successfully distributed this ONU ID for the ONU corresponding to this SN.It should be noted that this application does not limit the first activation message. Optionally, this first activation message may include distribution ONU ID (Assign ONU_ID) message, and / or collision feedback message (collision_feedback message).Exemplarily, when the first activation message includes Assign ONU_ID message, Assign ONU_ID message carries activation instruction information, ONU ID and SN. Therefore, ONU can receive this Assign ONU_ID message according to SN, and obtain corresponding, the ONU ID that OLT distributes. The activation indication information may be the 18th byte in the Assign ONU_ID message, that is, the name of the byte is allocation feedback. It will be understood by those skilled in the art that the description of the activation message type and the fields carried in this embodiment are all optional examples and are not limiting.

[0116] The OLT shown in this embodiment measures the distance of the ONU, thereby calculating the RTD of the ONU and then sending the EQD to the ONU. The specific process of the OLT measuring the distance of the ONU will not be described in detail. After the distance measurement is completed, the ONU enters state O5. If the ONU passes authentication, that is, the ONU can access the PON interface of the OLT and can be managed by the OLT, realizing uplink and downlink data transmission with the OLT. This embodiment uses the successful activation of the ONU as an example. If the ONU fails authentication, it can also be understood that the ONU identity is illegal, that is, the ONU cannot or is not allowed to access the PON interface of the OLT. In this case, the OLT does not execute the processes such as step 303 so that the OLT will not manage the ONU.

[0117] After obtaining the first and second optical transceiver options, the OLT may also determine whether the first and second optical transceiver options match. If the first and second optical transceiver options are determined to match, the OLT may then register the ONU. This ensures that the second optical transceiver option of the successfully activated ONU matches the first optical transceiver option of the OLT, thereby ensuring that the upstream optical signal transmitted by the ONU can be successfully received by the OLT and ensuring the reliability of upstream optical signal transmission. Alternatively, if the first and second optical transceiver options are determined to not match, the OLT may continue the ONU registration process and attempt to receive upstream optical signals from the ONU even if the first and second optical transceiver options do not match. Alternatively, after obtaining the first and second optical transceiver options, the OLT may directly register the ONU without determining whether the first and second optical transceiver options match.

[0118] If optical networks are applied to scenarios such as 50G PON and 200G PON, 50G PON is an example. 50G PON is technically challenging, and for the same optical link loss level, two independent transceiver options are defined: N1 and N1b, and C+ and C+b. It should be noted that the descriptions of N1, N1b, C+, and C+b in this embodiment are merely examples and can be applied to other types and numbers of transceiver options without limitation. Even at the same optical link loss level, different transceiver options can produce different transceiver performance. Using the method described in this embodiment, during the ONU registration process, the OLT's first optical transceiver option and the ONU's second optical transceiver option are negotiated. This ensures that the ONU's first and second optical transceiver options are in a matching state, thereby ensuring that the performance of the first and second optical transceiver options are matched. For example, when the first and second optical transceiver options are matching, the first optical transceiver's receiving sensitivity (indicated by the first optical transceiver option) can successfully receive the optical power (indicated by the second optical transceiver option) from the second optical transceiver. This effectively ensures the reliability of upstream optical signal transmission. Furthermore, based on this negotiation process, the OLT can obtain the ONU's second optical transceiver option, and the ONU can obtain the OLT's first optical transceiver option, facilitating the operation and maintenance of the optical network.

[0119] FIG3 b is a flowchart of the steps of the second embodiment of the communication method provided by the present application. In the embodiment shown in FIG3 b , the optical transceiver options supported by the ONU can be changed according to the instructions of the OLT. The specific process is as follows:

[0120] Step 311: The OLT sends a downlink frame to the ONU.

[0121] For the description of the execution process of step 311 shown in this embodiment, please refer to step 301 shown in Figure 3a, and the details are not repeated here.

[0122] Step 312: The ONU sends a first uplink frame to the OLT, reporting the optical transceiver option corresponding to the second optical transceiver of the ONU.

[0123] Taking the optical transceiver option corresponding to the second optical transceiver of the ONU shown in this embodiment as the fifth optical transceiver option as an example, the fifth optical transceiver option is used to indicate the performance of the second optical transceiver. For the specific description of the fifth optical transceiver option shown in this embodiment, please refer to the description of the second optical transceiver option shown in Figure 3a, and the details will not be repeated.

[0124] Optionally, the ONU shown in step 312 can determine whether the fifth optical transceiver option matches the first optical transceiver option. For details, please refer to step 302, and the details are not repeated here. In this example, if the ONU determines that the first optical transceiver option matches the fifth optical transceiver option, the ONU sends a first upstream frame to the OLT.

[0125] Alternatively, the ONU may not determine whether the first optical transceiver option matches the fifth optical transceiver option and may directly send a first upstream frame to the OLT to report the optical transceiver option corresponding to the ONU's second optical transceiver. Optionally, when the upstream frame sent by the ONU in step 312 is a Serial_Number_ONU message for a registration request, the OLT executes step 313.

[0126] Step 313: The OLT sends a first activation message to the ONU.

[0127] For the description of step 313 shown in this embodiment, please refer to the corresponding step 303 in Figure 3a, and the details are not repeated here.

[0128] Step 314: When the first optical transceiver option does not match the fifth optical transceiver option and the fifth optical transceiver option supports change, the ONU sends a first upstream frame to the OLT.

[0129] For the description of the ONU determining that the first optical transceiver option and the fifth optical transceiver option do not match, please refer to the description of the first optical transceiver option and the second optical transceiver option in FIG3a , and the details are not repeated here. If the ONU determines that the first optical transceiver option and the fifth optical transceiver option do not match, the ONU then proceeds to determine whether the fifth optical transceiver option can be changed. Changing the fifth optical transceiver option means that the fifth optical transceiver option supported by the second optical transceiver can be changed. For example, if the fifth optical transceiver option is N1, and the fifth optical transceiver option supported by the second optical transceiver can be changed to N1b, C+, or C+b, then the fifth optical transceiver option supports optical transceiver option change. Not supporting optical transceiver option change means that the fifth optical transceiver option cannot be changed. For example, the fifth optical transceiver option is N1 and cannot be changed.

[0130] When the ONU determines that the first optical transceiver option does not match the fifth optical transceiver option, the ONU changes the fifth optical transceiver option to the second optical transceiver option. In this embodiment, if the first optical transceiver option does not match the fifth optical transceiver option, and the fifth optical transceiver option supports change, the ONU changes the optical transceiver option supported by the second optical transceiver from the fifth optical transceiver option to the second optical transceiver option. The first optical transceiver option matches the second optical transceiver option. For an explanation of the matching of the first optical transceiver option and the second optical transceiver option, please refer to step 302 corresponding to FIG. 3a , and details are not repeated here. When the ONU changes the optical transceiver option supported by the second optical transceiver from the fifth optical transceiver option to the second optical transceiver option, the ONU sends a first upstream frame to the OLT, reporting the optical transceiver option corresponding to the ONU's second optical transceiver (i.e., the changed second optical transceiver option). For the description of the first uplink frame, please refer to step 302 corresponding to FIG3a , and detailed description is omitted.

[0131] This embodiment does not limit the number of fifth optical transceiver options supported by the second optical transceiver. If the second optical transceiver supports only one fifth optical transceiver option, the fifth optical transceiver option does not match the first optical transceiver option and can be changed. The optical transceiver option currently configured for the second optical transceiver is the fifth optical transceiver option. If the ONU changes the optical transceiver option supported by the second optical transceiver to the second optical transceiver option, the optical transceiver option currently configured for the second optical transceiver is also changed to the second optical transceiver option. The ONU's second optical transceiver transmits an upstream optical signal to the OLT according to the parameters indicated by the currently configured second optical transceiver option. If the second optical transceiver supports multiple fifth optical transceiver options (e.g., optical transceiver options N1 and N1b), and the fifth optical transceiver option does not match the first optical transceiver option and supports change, the ONU changes the optical transceiver option supported by the second optical transceiver to the second optical transceiver option. In this case, the second optical transceiver option may also be multiple, and the optical transceiver option currently configured for the second optical transceiver is one of the multiple second optical transceiver options. The second optical transceiver of the ONU transmits an upstream optical signal to the OLT according to the parameters indicated by the currently configured optical transceiver option. Optionally, when the upstream frame sent by the ONU in step 314 is a Serial_Number_ONU message for a registration request, the OLT executes step 315.

[0132] Step 315: The OLT sends a first activation message to the ONU.

[0133] When the OLT receives the first uplink frame in step 314, it sends a first activation message to the ONU. For details, please refer to step 303 corresponding to FIG. 3a, which will not be described in detail.

[0134] Step 316: If the first optical transceiver option does not match the fifth optical transceiver option and the fifth optical transceiver option does not support change, the ONU sends a second upstream frame to the OLT.

[0135] If the first optical transceiver option does not match the fifth optical transceiver option, the ONU sends a second upstream frame to the OLT in an attempt to register with the OLT. The second upstream frame reports the optical transceiver option corresponding to the ONU's second optical transceiver (i.e., the changed fifth optical transceiver option is not supported). For instructions on the ONU sending the second upstream frame, please refer to the instructions for sending the first upstream frame, shown in step 312 corresponding to FIG. 3b . Details are not repeated here. Optionally, if the upstream frame sent by the ONU, shown in step 306, is a Serial_Number_ONU message for a registration request, the OLT executes step 317.

[0136] Step 317: The OLT sends a second activation message to the ONU.

[0137] For the description of step 317, please refer to the description of the first activation message shown in 315 corresponding to FIG3b, and the details are not repeated here.

[0138] Using the method shown in this embodiment, during the ONU registration process, the first optical transceiver option of the OLT and the fifth optical transceiver option of the ONU are negotiated with each other. If the first optical transceiver option does not match the fifth optical transceiver option, the ONU can change the fifth optical transceiver option to the second optical transceiver option, and the second optical transceiver option matches the first optical transceiver option, thereby ensuring that the performance of the first optical transceiver matches the performance of the second optical transceiver.

[0139] Figure 6 is a flowchart of the steps of a third embodiment of the communication method provided by this application. In the embodiments shown in Figures 3a and 3b, the OLT and ONU each only support one optical transceiver option. In the embodiment shown in Figure 6, the OLT and ONU each support multiple optical transceiver options.

[0140] Step 601: The OLT sends a downlink frame to the ONU.

[0141] In order to achieve the purpose of registering the ONU with the OLT, the OLT sends the downlink frame by broadcasting. The downlink frame is used to indicate the authorization time. For specific instructions, please refer to step 301 corresponding to Figure 3a, and detailed description is omitted. The downlink frame carries first indication information, and the first indication information is used to indicate the first optical transceiver option and the fourth optical transceiver option. For the description of the first optical transceiver option, please refer to the corresponding description of Figure 3a, and detailed description is omitted. The fourth optical transceiver option shown in this embodiment is used to indicate the performance of the first optical transceiver, and the first optical transceiver option and the fourth optical transceiver option correspond to the same optical link loss level. For example, the first optical transceiver option and the fourth optical transceiver option correspond to optical link loss level N1, and of the first optical transceiver option and the fourth optical transceiver option, one is optical transceiver option N1 and the other is optical transceiver option N1b. For another example, the first optical transceiver option and the fourth optical transceiver option correspond to an optical link loss level of C+, and one of the first optical transceiver option and the fourth optical transceiver option is optical transceiver option C+, and the other is optical transceiver option C+b. For an explanation of the first indication information indicating the fourth optical transceiver option, please refer to the explanation of the first indication information indicating the first optical transceiver option shown in step 301 corresponding to FIG. 3a , and the details are not repeated here.

[0142] Step 602: The ONU sends an uplink frame to the OLT, reporting the optical transceiver option corresponding to the second optical transceiver of the ONU.

[0143] In this embodiment, the ONU supports a second optical transceiver option and a third optical transceiver option, wherein the second optical transceiver option and the third optical transceiver option are both options supported by the second optical transceiver included in the ONU. For a description of the second optical transceiver option and the third optical transceiver option, please refer to the description of the optical transceiver options supported by the second optical transceiver corresponding to Figure 3a, and the details are not repeated here. The second optical transceiver option and the third optical transceiver option shown in this embodiment correspond to the same optical link loss level. For example, the second optical transceiver option and the third optical transceiver option correspond to optical link loss level N1, and one of the second optical transceiver option and the third optical transceiver option is optical transceiver option N1, and the other is optical transceiver option N1b. For another example, the second optical transceiver option and the third optical transceiver option correspond to optical link loss level C+, and one of the second optical transceiver option and the third optical transceiver option is optical transceiver option C+, and the other is optical transceiver option C+b.

[0144] Specifically, the ONU obtains the authorization time indicated by the downlink frame, and sends the uplink frame to the OLT in the time window corresponding to the authorization time. The uplink frame is used to request registration with the OLT, and in this embodiment, the uplink frame also carries second indication information, which is used to indicate the second optical transceiver option and the third optical transceiver option.

[0145] Optionally, in this embodiment, the ONU may send the uplink frame when at least one of the second optical transceiver option and the third optical transceiver option matches one of the first optical transceiver option and the fourth optical transceiver option. For an explanation of the matching of two different optical transceiver options, please refer to step 303 corresponding to Figure 3a, and the details are not repeated here.

[0146] Optionally, the ONU may not determine whether the optical transceiver option corresponding to the first optical transceiver matches the optical transceiver option corresponding to the second optical transceiver, and may directly send an uplink frame to the OLT to report the optical transceiver option corresponding to the second optical transceiver of the ONU. When the uplink frame sent by the ONU in step 602 is a Serial_Number_ONU message for a registration request, the OLT executes step 603.

[0147] Step 603: The OLT sends an activation message to the ONU.

[0148] When the OLT receives an upstream frame from an ONU, it assigns an ONU ID to the ONU and simultaneously creates a mapping between the SN and the ONU ID. The OLT sends activation instructions and the ONU ID to the ONU, indicating that the OLT has successfully assigned the ONU ID to the ONU. The activation message shown in this embodiment also indicates a target optical transceiver option, where the target optical transceiver option is one of the second optical transceiver option and the third optical transceiver option. Specifically, the OLT instructs the ONU to operate in the target optical transceiver option by sending an activation message indicating the target optical transceiver option to the ONU.

[0149] For example, if the first optical transceiver of the OLT shown in this embodiment supports options C+ and C+b, and the OLT obtains from upstream frames whether the second optical transceiver of the ONU supports options C+ and C+b. If the OLT determines that the first optical transceiver receives upstream optical signals based on option C+b, then to ensure the reliability of upstream optical signal transmission, the OLT hopes that the target optical transceiver option of the ONU will also be C+b, so as to ensure that the optical transceiver option of the first optical transceiver matches the optical transceiver option of the second optical transceiver.

[0150] The activation message shown in this embodiment may be Assign ONU_ID. The Assign ONU_ID may be shown in Table 9:

[0151] Table 9

[0152] The target bit in the Assign ONU_ID message can be used to indicate the target optical transceiver option. The target bit is the 6th bit from the high bit to the low bit in the 15th byte of the Assign ONU_ID message, indicating the target optical transceiver option. For example, if the OLT wants the target optical transceiver option that the ONU works in to be N1 or C+, then the value of the target bit T is 0. If the OLT wants the target optical transceiver option that the ONU works in to be N1b or C+b, then the value of the target bit T is 1. It should be clear that the description of the OLT indicating the target transceiver option to the ONU in this embodiment is an optional example and is not limited. In other application scenarios, the target optical transceiver option can be indicated through any type of message, field, and any value.

[0153] Step 604: The ONU configures the second optical transceiver option as the target optical transceiver option.

[0154] In this embodiment, upon receiving the activation message, the ONU obtains the target optical transceiver option. For example, if the target optical transceiver option is C+b, the ONU can then determine that the OLT desires the ONU to operate in target optical transceiver option C+b and transmit upstream optical signals to the OLT based on target optical transceiver option C+b. To this end, the ONU configures the second optical transceiver option to be the target optical transceiver option C+b, enabling the ONU to transmit upstream optical signals to the OLT based on the parameters indicated by target optical transceiver option C+b. A description of target optical transceiver option C+b is shown in Table 6 and is not further detailed here.

[0155] Using the method shown in this embodiment, the OLT supports multiple optical transceiver options under the same link budget parameters, and the ONU also supports multiple optical transceiver options under the same link budget parameters. The OLT can directly instruct the ONU on the optical transceiver option it is operating on through an activation message, allowing the ONU to clearly determine which of the multiple supported optical transceiver options is used for upstream optical signal transmission. This ensures the reliability of upstream optical signal transmission and reduces the efficiency of the OLT configuring the optical transceiver option for the first optical transceiver and the ONU configuring the optical transceiver option for the second optical transceiver.

[0156] Regarding the above method embodiment, it should be noted that:

[0157] (1) The step numbers in the flowcharts described in the embodiments are merely examples of the execution process and do not limit the order in which the steps are executed. In the embodiments of the present application, there is no strict execution order for steps that have no temporal dependencies. Furthermore, not all steps shown in the flowcharts are mandatory steps, and steps may be added or deleted based on actual needs.

[0158] (2) In the various embodiments of the present application, unless otherwise specified or there is a logical conflict, the terms and / or descriptions between different embodiments are consistent and can be referenced by each other. The technical features in different embodiments can be combined to form new embodiments according to their inherent logical relationships.

[0159] (3) The above embodiments use some messages and parameters in the PON system in the description. However, in the specific implementation, different messages or message names may be used, and the present application does not limit this. In addition, in some of the above embodiments, the devices in the existing PON network architecture are mainly used as examples for exemplary description (OLT, ONU). It should be understood that the present application does not limit the specific form of the devices. For example, devices that can achieve the same function in the future are applicable to the present application.

[0160] (4) In the above-mentioned various method embodiments, the methods and operations implemented by devices (such as OLT, ONU) may also be implemented by components of the devices (such as chips or circuits), without limitation.

[0161] The above describes in detail the method provided by the embodiments of the present application. The following describes in detail the device and chip system provided by the embodiments of the present application. It should be understood that the description of the device embodiment corresponds to the description of the method embodiment. Therefore, for matters not described in detail, please refer to the method embodiment above. For the sake of brevity, they are not repeated here.

[0162] The above communication method is mainly introduced from the perspective of the interaction between the OLT and the ONU. It is understandable that in order to implement the above functions, the OLT and the ONU include corresponding hardware structures and / or software modules for performing each function.

[0163] It will be appreciated that, to implement the functions described in the above embodiments, the OLT and ONU include hardware structures and / or software modules corresponding to the respective functions. Those skilled in the art will readily appreciate that, in conjunction with the various exemplary units and method steps described in the embodiments disclosed herein, the present application can be implemented in hardware or a combination of hardware and computer software. Whether a function is implemented in hardware or in a hardware-driven manner by computer software depends on the specific application scenario and design constraints of the technical solution.

[0164] Figure 7 is a schematic block diagram of an embodiment of a communication device provided herein. Specifically, communication device 700 includes a transmitting module 701, a processing module 702, and a receiving module 703. Transmitting module 701 may also be referred to as a transmitter, a transmitting unit, a transmitting device, etc. Receiving module 703 may also be referred to as a receiver, a receiving unit, a receiving device, etc. Processing module 702 is used to implement corresponding processing functions. Transmitting module 701 and receiving module 703 may also be referred to as communication interfaces or communication units.

[0165] Optionally, the communication device 700 further includes a storage unit, which can be used to store instructions and / or data. The processing module 702 can read the instructions and / or data in the storage unit to perform corresponding processing control actions.

[0166] For example, the communication device may be an OLT as shown in FIG1 , or a module (such as a chip) applied to the OLT. For another example, the communication device may be a main device as shown in FIG2 , or a module (such as a chip) applied to the main device. Then, in the embodiment corresponding to FIG3a , the sending module 701 is used to execute steps 301 and 303. The receiving module 703 is used to execute step 302. In the embodiment corresponding to FIG3b , the sending module 701 is used to execute steps 311, 313, 315, and 317. The receiving module 703 is used to execute steps 312, 314, and 316. In the embodiment corresponding to FIG6 , the sending module 701 is used to execute steps 601 and 603, and the receiving module 703 is used to execute step 602.

[0167] For another example, the communication device may be an ONU or ONT as shown in Figure 1, or a module (such as a chip) applied to an ONU or ONT. For another example, the communication device may be a slave device as shown in Figure 2, or a module (such as a chip) applied to a slave device. Then, in the embodiment corresponding to Figure 3a, the sending module 701 is used to execute step 302. The receiving module 703 is used to execute steps 301 and 303. In the embodiment corresponding to Figure 3b, the sending module 701 is used to execute steps 312, 314, and 316. The receiving module 703 is used to execute steps 311, 313, 315, and 317. In the embodiment corresponding to Figure 6, the receiving module 703 is used to receive step 601 to receive a downlink frame and to execute step 603 to receive an activation message. The sending module 701 is used to execute step 602. The processing module 702 is used to execute step 604.

[0168] It should be understood that the specific process of each module executing the above corresponding steps has been described in detail in the above method embodiment, and for the sake of brevity, it will not be repeated here.

[0169] Optionally, the communication device 700 may be a device including an OLT, or a component configured in the OLT, such as an OLT chip. In this case, the receiving module 703 and the transmitting module 701 may be interface circuits, pins, etc. Specifically, the interface circuit may include an input circuit and an output circuit, wherein the receiving module 703 may include an input circuit, the transmitting module 701 may include an output circuit, and the processing module 702 may include a processing circuit.

[0170] Figure 8 is a schematic block diagram of another embodiment of the communication device provided in the present application. The communication device 800 includes a processor 801 and an optical transceiver 802. The optical transceiver 802 is used to perform photoelectric conversion to exchange data with the processor 801. The optical transceiver 802 is also used to transmit and receive optical signals with another communication device. Optionally, the optical transceiver 802 can be an interface, a bus, a circuit, or a device that can realize the transceiver function. For the description of the optical transceiver 802, please refer to the corresponding description of Figure 1, and the details are not repeated here. Optionally, the device used to realize the receiving function in the optical transceiver 802 can be regarded as a receiving module, and the device used to realize the sending function in the optical transceiver 802 can be regarded as a sending module, that is, the optical transceiver 802 includes a receiver and a transmitter.

[0171] For example, in one embodiment, the processor 801 is configured to perform other operations or functions of a chip of the OLT. The optical transceiver 802 is used to implement information exchange between the communication device 800 and the ONU.

[0172] In another embodiment, the processor 801 is configured to perform other operations or functions of the ONU chip. The optical transceiver 802 is used to implement information exchange between the communication device 800 and the OLT.

[0173] The communication device 800 may also include a memory 803 for storing computer programs or instructions or and / or data. The memory 803 is coupled to the processor 801, and the processor 801 is used to execute the computer program or instructions and / or data stored in the memory 803, so that the method in the above method embodiment is executed. The coupling in the embodiment of the present application is an indirect coupling or communication connection between devices, units or modules, which can be electrical, mechanical or other forms, and is used for information exchange between devices, units or modules. The processor 801 can operate in conjunction with the memory 803. It should be clear that the memory 803 shown in this embodiment is an optional device.

[0174] Optionally, the communication device 800 may include one or more processors 801 and one or more memories 803 .

[0175] Optionally, the memory 803 may be integrated with the processor 801 or provided separately.

[0176] The specific connection medium between the processor 801, optical transceiver 802, and memory 803 is not limited in the embodiments of the present application. In Figure 8, the processor 801, optical transceiver 802, and memory 803 are connected via bus 804. The bus is represented by a bold line in Figure 8. The connection between other components is for illustrative purposes only and is not intended to be limiting. The bus can be divided into an address bus, a data bus, a control bus, etc.

[0177] It should be understood that for ease of representation, FIG8 shows only one thick line, but this does not mean that there is only one bus or one type of bus.

[0178] 9 is a schematic diagram of an embodiment of a chip system provided by the present application. The chip system 900 (or also referred to as a processing system) includes a logic circuit 910 and an input / output interface 920 .

[0179] The logic circuit 910 may be a processing circuit in the chip system 900. The logic circuit 910 may be coupled to a storage unit and call instructions in the storage unit so that the chip system 900 can implement the methods and functions of the various embodiments of the present application. The input / output interface 920 may be an input / output circuit in the chip system 900, outputting information processed by the chip system 900 or inputting data or signaling information to be processed into the chip system 900 for processing.

[0180] Alternatively, the logic circuit 910 may be implemented by one or more processors, including the one or more processors or a processing portion in the one or more processors.

[0181] Optionally, the input / output interface 920 may include a transceiver circuit, a transceiver, an input / output circuit, or a communication interface.

[0182] As a solution, the chip system 900 is used to implement the operations performed by the OLT or ONU in the above various method embodiments.

[0183] Specifically, the logic circuit 910 is used to implement the processing-related operations performed by the OLT or ONU in the above method embodiment; the input / output interface 920 is used to implement the sending and / or receiving-related operations performed by the OLT or ONU in the above method embodiment.

[0184] An embodiment of the present application further provides a computer-readable storage medium storing computer instructions for implementing the methods executed by the OLT or ONU in the above-mentioned method embodiments.

[0185] For example, when the computer program is executed by a computer, the computer can implement the method performed by the OLT or ONU in each embodiment of the above method.

[0186] An embodiment of the present application further provides a computer program product, comprising instructions, which, when executed by a computer, implement the methods performed by the OLT or ONU in the above-mentioned method embodiments.

[0187] The present application also provides a PON system, which includes the ONU and / or OLT described in the above embodiments. For example, the system includes the ONU and OLT shown in Figure 1. In another example, the system includes the master device and / or slave device shown in Figure 2.

[0188] The explanation of the relevant contents and beneficial effects of any of the above-mentioned devices can be referred to the corresponding method embodiments provided above, which will not be repeated here.

[0189] In the several embodiments provided in this application, it should be understood that the disclosed devices and methods can be implemented in other ways. For example, the device embodiments described above are only schematic. For example, the division of the units is only a logical function division. In actual implementation, there may be other division methods, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. In addition, the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of devices or units, which can be electrical, mechanical or other forms.

[0190] In the above embodiments, it can be implemented in whole or in part by software, hardware, firmware or any combination thereof. When implemented using software, it can be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on a computer, the process or function described in the embodiment of the present application is generated in whole or in part. The computer can be a general-purpose computer, a special-purpose computer, a computer network, or other programmable device. For example, the computer can be a personal computer, a server, or a network device, etc. The computer instructions can be stored in a computer-readable storage medium or transmitted from one computer-readable storage medium to another computer-readable storage medium. For example, the computer instructions can be transmitted from one website, computer, server or data center to another website, computer, server or data center by wired (e.g., coaxial cable, optical fiber, digital subscriber line (DSL)) or wireless (e.g., infrared, wireless, microwave, etc.) mode. The computer-readable storage medium can be any available medium that a computer can access or a data storage device such as a server or data center that includes one or more available media integrations. The available medium may be a magnetic medium (e.g., a floppy disk, a hard disk, a magnetic tape), an optical medium (e.g., a DVD), or a semiconductor medium (e.g., a solid state disk (SSD)). For example, the aforementioned available medium includes, but is not limited to, various media that can store program code, such as a USB flash drive, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk, or an optical disk.

[0191] The above description is merely a specific embodiment of the present application, but the scope of protection of the present application is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in this application should be included in the scope of protection of this application. Therefore, the scope of protection of this application should be based on the scope of protection of the claims.

Claims

1. A communication method, characterized in that: The method comprises: An optical network terminal device receives a downlink frame from an optical network central office device, where the downlink frame carries first indication information, where the first indication information is used to indicate a first optical transceiver option, where the first optical transceiver option is used to indicate performance of a first optical transceiver included in the optical network central office device; The optical network terminal device sends an uplink frame to the optical network central office device, where the uplink frame carries the device identification and second indication information of the optical network terminal device, where the second indication information is used to indicate a second optical transceiver option, and the second optical transceiver option is used to indicate the performance of a second optical transceiver included in the optical network terminal device.

2. The method according to claim 1, characterized in that The second optical transceiver option matches the first optical transceiver option.

3. The method according to claim 1 or 2, characterized in that The optical transceiver option configured by the second optical transceiver is the fifth optical transceiver option, the first optical transceiver option does not match the fifth optical transceiver option, and after the optical network terminal device receives a downlink frame from the optical network central office device, the method further includes: The optical network terminal device changes the fifth optical transceiver option to the performance corresponding to the second optical transceiver option, wherein the first optical transceiver option matches the second optical transceiver option.

4. The method according to claim 1, wherein The first optical transceiver option does not match the second optical transceiver option.

5. The method according to claim 4, characterized in that The uplink frame further carries information indicating that the first optical transceiver option does not match the second optical transceiver option.

6. The method according to any one of claims 1 to 3, characterized in that The matching of the first optical transceiver option and the second optical transceiver option means that the first optical transceiver option is optical transceiver option N1, the second optical transceiver option is the optical transceiver option N1 and / or optical transceiver option N1b, or the first optical transceiver option and the second optical transceiver option are respectively the optical transceiver option N1b.

7. The method according to claim 6, characterized in that If the second optical transceiver option is optical transceiver option N1, the minimum average transmit power mapped by the optical transceiver option N1 is 6.8 decibel milliwatts (dBm), the maximum average transmit power mapped by the optical transceiver option N1 is 11.8 dBm, and the target parameter mapped by the optical transceiver option N1 is 4.47 dBm, where the target parameter is the transmit optical power calculated by subtracting the transmitter and dispersion eye closure TDEC from the optical modulation amplitude OMA; If the second optical transceiver option is optical transceiver option N1b, the minimum average transmit power mapped by the optical transceiver option N1b is 7.8 dBm, the maximum average transmit power mapped by the optical transceiver option N1b is 11.8 dBm, and the target parameter mapped by the optical transceiver option N1b is 5.47 dBm.

8. The method according to claim 6 or 7, characterized in that If the first optical transceiver option is optical transceiver option N1, the sensitivity at the bit error rate reference level mapped by the optical transceiver option N1 is -22.7 dBm, the sensitivity of the optical modulation amplitude at the bit error rate reference level mapped by the optical transceiver option N1 is -22.53 dBm, and the overload at the bit error rate reference level mapped by the optical transceiver option N1 is -2.2 dBm; If the first optical transceiver option is optical transceiver option N1b, the sensitivity at the bit error rate reference level mapped by the optical transceiver option N1b is -21.7dBm, the sensitivity of the optical modulation amplitude at the bit error rate reference level mapped by the optical transceiver option N1b is -21.53dBm, and the overload at the bit error rate reference level mapped by the first optical transceiver option N1b is -2.2dBm.

9. The method according to any one of claims 1 to 3, characterized in that The matching of the first optical transceiver option and the second optical transceiver option means that the first optical transceiver option is optical transceiver option C+, the second optical transceiver option is the optical transceiver option C+ and / or optical transceiver option C+b, or the first optical transceiver option and the second optical transceiver option are respectively the optical transceiver option C+b.

10. The method according to claim 9, characterized in that If the second optical transceiver option is optical transceiver option C+, the minimum average transmit power mapped by the optical transceiver option C+ is 6.8 dBm, the maximum average transmit power mapped by the optical transceiver option C+ is 11.8 dBm, and the target parameter mapped by the optical transceiver option C+ is 4.47 dBm, where the target parameter is the transmit optical power calculated by subtracting the transmitter and dispersion eye closure TDEC from the optical modulation amplitude OMA; If the second optical transceiver option is optical transceiver option C+b, the minimum average transmit power mapped by the optical transceiver option C+b is 7.8 dBm, the maximum average transmit power mapped by the optical transceiver option C+b is 11.8 dBm, and the target parameter mapped by the optical transceiver option C+b is 5.47 dBm.

11. The method according to claim 9 or 10, characterized in that If the first optical transceiver option is optical transceiver option C+, the sensitivity at the bit error rate reference level mapped by the optical transceiver option C+ is -25.7 dBm, the sensitivity of the optical modulation amplitude at the bit error rate reference level mapped by the optical transceiver option C+ is -25.53, and the overload at the bit error rate reference level mapped by the optical transceiver option C+ is -5.2 dBm; If the first optical transceiver option is optical transceiver option C+b, the sensitivity at the bit error rate reference level mapped by the optical transceiver option C+b is -24.7dBm, the sensitivity of the optical modulation amplitude at the bit error rate reference level mapped by the optical transceiver option C+b is -24.53dBm, and the overload at the bit error rate reference level mapped by the optical transceiver option C+b is -5.2dBm.

12. The method according to any one of claims 1 to 10, characterized in that The serial number Serial_Number message included in the uplink frame is used to carry the second indication information. If the value of the second indication information is the first value, it is used to indicate that the second optical transceiver option is optical transceiver option N1 or C+; if the value of the second indication information is the second value, it is used to indicate that the second optical transceiver option is optical transceiver option N1b or C+b.

13. The method according to claim 12, characterized in that The second indication information is the 5th bit or the 6th bit from the high order to the low order in the 40th byte of the Serial_Number message, the first value is 0, and the second value is 1.

14. The method according to any one of claims 1 to 3, characterized in that The second indication information is further used to indicate a third optical transceiver option, where the third optical transceiver option is used to indicate performance of the second optical transceiver, the second optical transceiver option is different from the third optical transceiver option, and the second optical transceiver option and the third optical transceiver option correspond to the same optical link loss level. After the optical network terminal device sends an uplink frame to the optical network central office device, the method further includes: The optical network terminal receives an activation message from the optical network central office device, where the activation message is used to indicate one of the second optical transceiver option and the third optical transceiver option.

15. The method according to claim 14, characterized in that The activation message is an Assign ONU_ID message for assigning an optical network terminal device identifier. The Assign ONU_ID message carries a target bit. The target bit is the 6th bit from the high bit to the low bit in the 15th byte of the Assign ONU_ID message. If the target bit value is 0, it is used to indicate that the optical transceiver option is N1 or C+. If the target bit value is 1, it is used to indicate that the optical transceiver option is N1b or C+b.

16. The method according to any one of claims 1 to 15, characterized in that The device identification of the optical network terminal device is a serial number.

17. A communication method, characterized in that: The method comprises: The optical network central office device sends a downlink frame to the optical network terminal device, where the downlink frame carries first indication information, where the first indication information is used to indicate a first optical transceiver option, where the first optical transceiver option is used to indicate performance of a first optical transceiver included in the optical network central office device; The optical network central office device receives an uplink frame from the optical network terminal device, where the uplink frame carries a device identification and second indication information of the optical network terminal device, where the second indication information is used to indicate a second optical transceiver option, and the second optical transceiver option is used to indicate the performance of a second optical transceiver included in the optical network terminal device.

18. The method according to claim 17, characterized in that The optical distribution network class ODN class field included in the downlink frame is used to carry the first indication information. When the first indication information takes the third value, it is used to indicate that the first optical transceiver option is N1. When the first indication information takes the fourth value, it is used to indicate that the first optical transceiver option is N1b. When the first indication information takes the fifth value, it is used to indicate that the first optical transceiver option is C+. When the ODN class field takes the sixth value, it is used to indicate that the first optical transceiver option is C+b.

19. The method according to claim 18, characterized in that The third value is 000, the fourth value is 101, the fifth value is 100, and the sixth value is 110.

20. The method according to claim 17, wherein The configuration capability burst profile message included in the downlink frame is used to carry the first indication information, where the first indication information is used to indicate that the first optical transceiver option is N1 or N1b, or the first indication information is used to indicate that the first optical transceiver option is C+ or C+b.

21. The method according to claim 20, characterized in that When the value of the first indication information is 0, it is used to indicate the optical transceiver option N1 or C+; when the value of the first indication information is 1, it is used to indicate the optical transceiver option N1b or C+b. The first indication information is the 4th bit from the high bit to the low bit in the 5th byte of the burst profile message, or the first indication information is the 5th or 6th bit from the high bit to the low bit in the 6th byte of the burst profile message.

22. The method according to any one of claims 17 to 21, characterized in that The first indication information is further used to indicate a fourth optical transceiver option, where the fourth optical transceiver option is used to indicate the performance of the first optical transceiver. The first optical transceiver option is different from the fourth optical transceiver option, and the first optical transceiver option and the fourth optical transceiver option correspond to the same optical link loss level.

23. The method according to any one of claims 17 to 22, characterized in that The second indication information is further used to indicate a third optical transceiver option, where the third optical transceiver option is used to indicate performance of the second optical transceiver, the second optical transceiver option is different from the third optical transceiver option, the first optical transceiver option and the third optical transceiver option correspond to the same optical link loss level, and after the optical network central office device receives an uplink frame from the optical network terminal device, the method further includes: The optical network central office device sends an activation message to the optical network terminal device, where the activation message is used to indicate one of the second optical transceiver option and the third optical transceiver option.

24. A communication device, characterized in that: The method comprises an optical transceiver and a processor, wherein the optical transceiver is used to realize the transmission and reception of optical signals, and the processor is used to execute the method according to any one of claims 1 to 16, or the processor is used to execute the method according to any one of claims 17 to 23.

25. A communication device, characterized in that: include: A module for performing the method according to any one of claims 1 to 16, or a module for performing the method according to any one of claims 17 to 23.

26. A chip, characterized in that: The chip includes a processor and a communication interface, wherein the communication interface is used to receive data and transmit it to the processor, or to send data from the processor to another chip, and the processor is used to execute the method according to any one of claims 1 to 16, or the method according to any one of claims 17 to 23.

27. A computer-readable storage medium, characterized in that The method comprises computer program instructions, which, when executed by a processor, cause the processor to perform the method according to any one of claims 1 to 23.

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