Communication method and related equipment

Abstract

The embodiment of the invention provides a communication method and related equipment, which can realize the purpose that optical network terminal equipment is registered to optical network local side equipment under the condition that an optical transceiver option supported by the optical network terminal equipment is matched with an optical transceiver option supported by the optical network local side equipment. And the reliability of sending the uplink optical signal to the optical network local side equipment by the optical network terminal equipment is improved. The method comprises the following steps: firstly, optical network terminal equipment receives a downlink frame from optical network local side equipment, the downlink frame carries first indication information, and the first indication information is used for indicating the performance of a first optical transceiver included in the optical network local side equipment; and secondly, the optical network terminal equipment sends an uplink frame to the optical network local side equipment, the uplink frame carries an equipment identifier of the optical network terminal equipment and second indication information, and the second indication information is used for indicating a second optical transceiver option.

Description

[0001] This application claims the priority of the Chinese patent application filed with the China Patent Office on March 1, 2024, with application number 202410238924.9 and invention name “A communication method and related equipment”, the entire contents of which are incorporated by reference in 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, and passive optical networks (PON) have been widely popularized and rapidly expanded. As user data demand continues to increase dramatically, 10 Gigabit (G) PON has entered the large-scale deployment stage, and the next generation of PON system standards (such as 50G PON and higher speed PON standards) are also being gradually formulated and improved.

[0004] PON specifically includes optical network central office equipment and optical network terminal equipment. The next generation of PON system standards can define multiple independent optical transceiver options for the same optical path loss class (ODN optical path loss class, ODN class). For example, for optical link 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 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] In the 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, which reduces 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 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. Secondly, the optical network terminal device sends an uplink frame to the optical network central office device, the uplink frame carries the 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. Optionally, the uplink frame containing the second indication information can be an uplink frame used for registration by the optical network terminal device. 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, which is convenient for 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 the negotiation of 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 an uplink optical signal 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 the optical transceiver options N1b, respectively. 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 the optical transceiver options C+b, respectively.

[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, when the optical network terminal device determines 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 optical network terminal device sending uplink optical signals to the optical network central office device. For example, when the first optical transceiver option and the second optical transceiver option are in a matching state, the receiving sensitivity of the first optical transceiver (indicated by the first optical transceiver option) can successfully receive the optical power from the second optical transceiver (indicated by the second optical transceiver option). Then, the reliability of the uplink optical signal transmission can be effectively guaranteed.

[0012] Based on the first aspect, in an optional implementation, the optical transceiver option configured by the optical network terminal device 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 second optical transceiver option, and the first optical transceiver option matches the second optical transceiver option. With this implementation, if the first optical transceiver option does not match the fifth optical transceiver option configured by 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 the performance of the second optical transceiver, thereby improving the reliability of uplink optical signal transmission.

[0013] Based on the first aspect, in an optional implementation manner, the first optical transceiver option does not match the second optical transceiver option. With this implementation manner, 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 for indicating that the first optical transceiver option does not match the second optical transceiver option. With this implementation, if the first optical transceiver option does not match the second optical transceiver option, the optical network terminal device sends information for indicating that the first optical transceiver option does not match the second optical transceiver option to the optical network central office device, so as to implement negotiation between the optical network central office device and the optical network terminal device on 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 the optical transceiver option N1 and / or optical transceiver option N1b, or the first optical transceiver option and the second optical transceiver option are the optical transceiver option N1b, respectively. By adopting this implementation, it is ensured 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. Then, the transmission of the uplink optical signal can effectively ensure the reliability of the uplink optical signal transmission, and can 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 11.8dBm, and the target parameter mapped by the optical transceiver option N1 is 4.47dBm, 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 7.8dBm, the maximum average transmit power mapped by the optical transceiver option N1b is 11.8dBm, and the target parameter mapped by the optical transceiver option N1b is 5.47dBm. 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 device 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 -22.7dBm, the sensitivity of the optical modulation amplitude at the bit error rate reference level mapped by the optical transceiver option N1 is -22.53dBm, and the overload at the bit error rate reference level mapped by the optical transceiver option N1 is -2.2dBm; if the first optical transceiver option is optical transceiver option N1b, the sensitivity of the optical transceiver option N1b at the bit error rate reference level mapped 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. 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 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 the optical transceiver option C+b, respectively. By adopting this implementation, it is ensured 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. Then, the transmission of the uplink optical signal can effectively ensure the reliability of the uplink optical signal transmission, and can 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 6.8dBm, the maximum average transmit power mapped by the optical transceiver option C+ is 11.8dBm, and the target parameter mapped by the optical transceiver option C+ is 4.47dBm, 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 7.8dBm, the maximum average transmit power mapped by the optical transceiver option C+b is 11.8dBm, and the target parameter mapped by the optical transceiver option C+b is 5.47dBm. 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 -25.7dBm, 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 -5.2dBm; if the first optical transceiver option is optical transceiver option C+b, the sensitivity of the optical transceiver option C+b at the bit error rate reference level mapped is -24.7dBm, the sensitivity of the optical modulation amplitude at the bit error rate reference level mapped is -24.53dBm, and the overload at the bit error rate reference level mapped is -5.2dBm. By adopting this implementation method, 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 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, and if the second indication information is a first value, it is used to indicate that the second optical transceiver option is an optical transceiver option N1 or C+, and if the second indication information is a second value, it is used to indicate that the second optical transceiver option is an optical transceiver option N1b or C+b. With 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 bit or the 6th bit from the high bit to the low bit in the 40th byte in 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 parameter, and the optical network terminal device also supports multiple optical transceiver options under the same link budget parameter. The optical network central office device can directly indicate the optical network terminal device's working optical transceiver option 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 for the first optical transceiver to work and the optical network terminal device configuring the optical transceiver option for the second optical transceiver to work.

[0024] Based on the first aspect, in an optional implementation method, 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, and 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+, and 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, the first optical transceiver option is used to indicate the 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, 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, the second optical transceiver option is used to indicate the performance of a 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 elaboration is 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 ODNclass field included in the downlink frame is used to carry the first indication information. When the first indication information is a third value, it is used to indicate that the first optical transceiver option is N1. When the first indication information is a fourth value, it is used to indicate that the first optical transceiver option is N1b. When the first indication information is a fifth value, it is used to indicate that the first optical transceiver option is C+. When the ODN class field is 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 burstprofile message included in the downlink frame is used to carry the first indication information, and 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; 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 also 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, 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, and 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, 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 second indication information has a value of 0, it is used to indicate that the optical transceiver option is N1 or C+, if the second indication information has a value of 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, comprising 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 a method as described in any one of the first aspects above, or a 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 executed on a computer, the method described in any one of the first aspect or the method described in any one of the second aspect 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 reception and transmission of optical signals, and the processor is used for the method described in any one of the first aspect or the second aspect above. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] Figure 1 A structural example diagram of an optical network;

[0041] Figure 2 Another structural example diagram of an optical network;

[0042] Figure 3a A flow chart of the first embodiment of the communication method provided by the present application;

[0043] Figure 3b A flow chart of the first embodiment of the communication method provided by the present application;

[0044] Figure 4 An example diagram of a frame structure of an embodiment of a downlink frame provided in the present application;

[0045] Figure 5An example diagram of a frame structure of an embodiment of an uplink frame provided in the present application;

[0046] Figure 6 A flowchart of the third embodiment of the communication method provided by the present application;

[0047] Figure 7 A schematic block diagram of an embodiment of a communication device provided by the present application;

[0048] Figure 8 A schematic block diagram of another embodiment of a communication device provided by the present application;

[0049] Fig. 9 A schematic diagram of an embodiment of a chip system is provided for the present application. DETAILED DESCRIPTION

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

[0051] Figure 1This 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 central office device 101, an optical distribution network (ODN) 110 and at least one optical network terminal device 102. The optical network central office device 101 is connected to at least one optical network terminal device 102 through ODN 110. This example does not limit the number of optical network terminal devices 102 included in the optical network. ODN 110 includes a passive optical splitter (Splitter), a trunk optical fiber (Feeder) connected between the optical network central office 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 device 101 sends an optical signal to the optical network terminal device 102 through the ODN, which is called downlink, and the optical network terminal device 102 sends an optical signal to the optical network central office device 101 through the ODN, which is called uplink. Specifically, when transmitting downlink data, the ODN 110 transmits the downlink data of the optical network central office device 101 to each optical network terminal device 102 through an optical splitter. When transmitting uplink data, the ODN 110 combines multiple uplink data from multiple optical network terminal devices 102 into one optical signal by time division multiplexing (TDM), and sends it to the optical network central office device 101. Each optical network terminal device 102 sends it in sequence according to the order specified by the optical network central office device 101, so as to avoid conflicts between the optical network terminal devices 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 Figure 1The description of the optical network type shown is an optional example and is not limited. For example, the optical network can also be applied to an optical transport network (OTN), and the optical network terminal 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 terminal device 101 and the optical network terminal device 102 are any two connected among multiple transmission devices. The optical network 100 shown in this example can also be applied to a data center network (DCN), a metropolitan area network, 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 GPON (10-Gigabit-capable symmetric passive optical network, XGS-PON), Ethernet, or a combination of any one or more of Flex Ethernet (FlexE), a wavelength division multiplexing (WDM) network, etc., without specific limitation. The method shown in this embodiment takes the application to 50G PON as an example.

[0053] Taking the optical network terminal device 102 as an example, this example does not limit the device type of the optical network terminal device 102. As the optical network application scenarios are different, the device type of the optical network terminal device 102 may also be different. For example, the 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., or a computing server (usually referred to as a server), a high performance computer (HPC), a storage server, or a memory resource pool, etc. This example does not limit the type of the optical network terminal device 102, as long as the optical network terminal device 102 has an electro-optical conversion function and an optical interface that can be connected to an optical fiber. For the description of the type of the optical network central office device 101, please refer to the description of the optical network terminal device 102, and the details will not be repeated.

[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. 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 onboard optical module (OBO) based on optical input and output interface (OIO) technology, or a co-package optical module (CPO). The optical transceiver described in this application can be a transceiver-in-one device, 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 single board 111 or can be plugged into the single board of the device single board 111, etc., and is not specifically limited. Specifically, the device single board 111 has packaged a processor and a connector, and the connector is used to connect the processor and the optical transceiver 112. Among them, 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 (optical digital signal processor, oDSP), digital signal processor (digital signal processing, DSP), field programmable gate array (field-programmable gate array, FPGA), application specific integrated circuit (application specific integrated circuit, ASIC), system on chip (system on chip, SoC), central processor unit (central processor unit, CPU), network processor (network processor, NP), microprocessor (microcontroller unit, MCU), programmable processor (programmable logic device, PLD), network card chip, storage interface chip or other integrated chip, or any combination of the above chips, or processing modules, etc., and will not be described in detail. The processor has a transmission interface, which is connected to the connector. The connector is used to provide an electrical interface, which implements 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 detailed description, please refer to the description of the optical network terminal device 102, and the details are not repeated here.

[0055] Fiber to the home (FTTH) is a transmission method for optical fiber communication. The access network part in the aforementioned optical network can achieve a wider coverage of the optical network through FTTH. In addition, fiber to the office (FTTO), fiber to the building (FTTB) and other similar communication transmission methods are also proposed, which can also be the application architecture of the method provided in this application. Figure 1 The examples shown are illustrative based on FTTH.

[0056] On the basis of FTTH, in order to solve the problem of wireless fidelity (WIFI) coverage in home networks, optical fibers can be further extended to residents' rooms. Optical terminal equipment that provides WiFi access is installed inside the room, which shortens the distance between the user terminal and the WiFi access point and improves the signal quality. This application scenario is called fiber to the room (FTTR).

[0057] Figure 2 Another example diagram of the structure of an optical network is shown below. Specifically, Figure 2 The diagram is a schematic diagram of the system architecture of FTTR. The FTTR network and the FTTH network can be regarded as cascaded PON systems. The OLT in FTTH is deployed in the center office (CO), and the ONU is deployed in the information box of the home. The master device in FTTR can replace the ONU in FTTH. The master device has similar functions to the OLT in the FTTH scenario in the FTTR scenario, and the master device can also have similar functions to the ONU in the FTTH scenario. In other words, the master device in FTTR is a device that has both OLT and ONU functions, and can be used as a network device that plays a connecting role between FTTH and FTTR. The slave device in FTTR can be deployed in each room of the home to connect with the user terminal (station). The slave device and the ONU in FTTH are essentially similar network devices. The slave device in FTTR enters each room, and the slave gateway can also have the function of an access point (AP), which can directly connect to the user terminal through WiFi. The user terminal can access the slave device and transmit data through the WiFi connection established with the slave device.

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

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

[0060] Understandably, Figure 1 as well as Figure 2 This is just a schematic diagram. The optical network may also include other devices, such as wavelength division equipment, optical amplifier equipment, and more optical network terminal equipment. Figure 1 as well as Figure 2 Not drawn in.

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

[0062] In order to better understand 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 activation process of ONU is divided into three steps: parameter learning, serial number acquisition and ranging. Specifically, in the parameter learning step, ONU remains passive and obtains the operating parameters for upstream transmission; in the serial number acquisition step, OLT discovers the new ONU through the serial number of the new ONU, and then assigns an ONU ID to the new ONU. In the ranging step, after receiving the ranging response message from the ONU, the OLT calculates the ONU's loop delay (rONUd trip delay, RTD) according to the sending time of the ranging request message and the arrival time of the ranging response message, and then calculates the ONU's equalization delay (EQD) according to the sending time of the ranging request message, the arrival time of the ranging response message, the ONU's response processing time and the system benchmark equalization delay and sends it to the ONU. The entire ONU activation process can be divided into several different states. One possible implementation method is to divide it into seven states, namely, the initial state, also known as the O1 state; the standby state, also known as the O2 state; the serial number state, also known as the O3 state; the ranging state, also known as the O4 state; the operation state, also known as the O5 state; the pop-up state, also known as the O6 state; and the emergency stop state, also known as the O7 state. It should be noted that the ONU activation process can also be called the ONU registration process. The ONU completes the registration with the OLT by executing each step of the activation process.

[0064] If the optical transceiver option supported by the optical transceiver included in the OLT does not match the optical transceiver option 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, which can be applied to the activation process of the ONU. When the optical transceiver option supported by the optical transceiver included in the OLT matches the optical transceiver option 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] Figure 3a This is a flowchart of the first embodiment of the communication method provided in this application.

[0066] Step 301: OLT sends a downstream frame to ONU.

[0067] The OLT sends a downstream frame to the ONU, and the downstream frame carries the 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 (optical 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 upstream optical signals.

[0068] Optionally, the OLT sends the downlink frame by broadcasting to discover unregistered ONUs. The downlink frame is used to indicate the authorization time to indicate that the ONU to be activated sends an uplink frame to the OLT in the time window corresponding to the authorization time to report the device information of the ONU. The downlink frame is also used to carry the first indication information, and the first indication information is used to indicate the first optical transceiver option. The first optical transceiver option is an optical transceiver option supported by the 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 the optical link loss level N1 (such as optical transceiver option N1 or N1b), and for another example, the first optical transceiver option is an option included in the optical link loss level C+ (such as optical transceiver option C+ or C+b).

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

[0071] Table 1

[0072] Optical link loss level N1 C+ Maximum link loss 29 decibels (dB) 32dB Minimum link loss 14dB 17dB

[0073] 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.

[0074] 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 are not limited in this application. Several possible implementation methods are provided below.

[0075] Option 1

[0076] The structure of the downlink frame shown in this method can be seen in Figure 4 As shown, Figure 4An example frame structure diagram of an embodiment of a downlink frame provided in the present application. Downlink frame 400 includes a physical synchronization block (PSBd) and a physical layer frame payload (PHY frame payload). 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 a FS frame header (Header) and a 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 an OC data body field and a 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 ODN 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, and any two values ​​among the third value, the fourth value, the fifth value and the sixth value are different from each other.

[0077] For example, as shown in Table 2, the ODN class field includes 3 bits as an example:

[0078] Table 2

[0079] Code value Optical transceiver option 000 N1 001 N2 010 E1 011 E2 100 C+ 101 N1b 110 C+b 111 Reserved

[0080] 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.

[0081] Option 2

[0082] 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 Figure 4 Corresponding description), 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:

[0083] The ODN class field is used to indicate the optical link loss level. For details, see Table 3:

[0084] Table 3

[0085] Code value ODN class 000 N1 001 N2 010 E1 011 E2 100 C+ 101-111 Reserved

[0086] The first indication information carried by the burst profile message can be seen in Table 4:

[0087] Table 4

[0088]

[0089] For example, the 4th bit from high to low in the 5th byte of the burst profile message (i.e., 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 5th bit in the 6th 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 6th bit in the 6th byte of the burstprofile message (i.e., the second R in the bit sequence NNMMRRCF) can be used as the first indication information for the first optical transceiver option. When the bit value for indicating the first optical transceiver option is 0, it is used to indicate the optical transceiver option N1 or the optical transceiver option C+, and when the bit value for indicating the first optical transceiver option is 1, it is used to indicate the optical transceiver option N1b or the optical transceiver option C+b. For example, if the OLT wishes to indicate the first optical transceiver option N1b to the ONU, the value of the ODN class field is 000, and the value of the first indication message is 1. The ONU determines that the first optical transceiver option corresponds to the optical link loss level N1 based on the ODN class field whose value is 000. Then, based on the first indication message whose value is 1, the corresponding optical transceiver option N1b or C+b is determined. Among the optical transceiver options N1b or C+b, only the optical transceiver option N1b corresponds to the optical link loss level N1 (that is, only the optical transceiver option N1b is the optical transceiver option under the optical link loss level N1), and the ONU determines that the first optical transceiver option is N1b. By analogy, if the OLT needs to indicate the first optical transceiver option N1 to the ONU, because the optical transceiver option N1 corresponds to the optical link loss level N1, the value of the ODN class field is 000, and the value of the first indication information carried by the burstprofile message is 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. It can be understood by those skilled in the art that the above example is only one possible implementation method, and the present application does not limit the specific bits and value meanings used to indicate the first optical transceiver option.

[0090] It should be clear that the description of the manner in which the downlink frame carries the first indication information and the description of the values ​​of each field in this embodiment are all optional examples and are not limited. 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 from the description of the first indication information above that the first optical transceiver option shown in this embodiment is one of N1, N1b, C+ and C+b. The following specifically describes each first optical transceiver option in combination with Table 5.

[0091] Table 5

[0092]

[0093] 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. Then, different optical transceiver options indicate different performances of the first optical transceiver. The first parameter is the sensitivity at the bit error rate reference level (sensitivity at BER reference level). BER is the abbreviation of sensitivity (Bit Error Ratio). The second parameter is the sensitivity of the optical modulation amplitude at the bit error rate reference level (OMA sensitivity at BER reference level). The third parameter is the overload at the bit error rate reference level (overload at BER reference level). As shown in Table 5, the first parameter mapped by the first optical transceiver option N1 is -22.7dBm, the first parameter mapped by the first optical transceiver option N1b is -21.7dBm, the second parameter mapped by the first optical transceiver option N1 is -22.53dBm, the second parameter mapped by the first optical transceiver option N1b is -21.53dBm, and the third parameters mapped by the first optical transceiver option N1 and the first optical transceiver option N1b are both -2.2dBm. The first parameter mapped by the first optical transceiver option C+ is -25.7dBm, the first parameter mapped by the first optical transceiver option C+b is -24.7dBm, the second parameters mapped by the first optical transceiver option C+ and the first optical transceiver option C+b are -25.53dBm, and the third parameters mapped by the first optical transceiver option C+ and the first optical transceiver option C+b are both -5.2dBm.

[0094] 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.

[0095] 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:

[0096] Table 6

[0097]

[0098] As shown in Table 6, the second optical transceiver option supported by the second optical transceiver is used to indicate the performance of the second optical transceiver. Then, when the second optical transceiver supports different second optical transceiver options, different performances of the second optical transceiver are described. If the second optical transceiver option supported by the second optical transceiver is optical transceiver option N1, the minimum average transmit power mapped by the optical transceiver option N1 is 6.8dBm, the maximum average transmit power mapped by the optical transceiver option N1 is 11.8dBm, and the target parameter mapped by the optical transceiver option N1 is 4.47dBm, wherein the target parameter is the transmit optical power calculated by subtracting TDEC from OMA. If the second optical transceiver option supported by the second optical transceiver is optical transceiver option N1b, the minimum average transmit power mapped by the optical transceiver option N1b is 7.8dBm, the maximum average transmit power mapped by the optical transceiver option N1b is 11.8dBm, and the target parameter mapped by the optical transceiver option N1b is 5.47dBm. If the second optical transceiver option supported by the second optical transceiver is optical transceiver option C+, the minimum average transmit power mapped by the optical transceiver option C+ is 6.8dBm, the maximum average transmit power mapped by the optical transceiver option C+ is 11.8dBm, and the target parameter mapped by the optical transceiver 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 mapped by the optical transceiver option C+b is 7.8dBm, the maximum average transmit power mapped by the optical transceiver option C+b is 11.8dBm, and the target parameter mapped by the optical transceiver option C+b is 5.47dBm. This embodiment does not limit the specific content of the second optical transceiver option. For example, the maximum TDEC mapped by the second optical transceiver options N1, N1b, C+, and C+b supported by the second optical transceiver is 5dB. The launch optical power without input to the transmitter mapped by the second optical transceiver options N1, N1b, C+, and C+b supported by the second optical transceiver is lower than -45dBm. The Maximum Txenable time mapped by the second optical transceiver options N1, N1b, C+, and C+b supported by the second optical transceiver transmits 6400Bits in about 128.6ns. The Maximum Tx diable time of the second optical transceiver options N1, N1b, C+ and C+b mapping supported by the second optical transceiver is 6400 bits transmitted in about 128.6ns. The Minimum extinction ratio of the second optical transceiver options N1, N1b, C+ and C+b mapping supported by the second optical transceiver is 5dB.

[0099] 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.

[0100] Optionally, the ONU may determine whether the first optical transceiver option matches the second optical transceiver option supported by the second optical transceiver. The matching of the first optical transceiver option and the second optical transceiver option includes any of the following examples:

[0101] 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.

[0102] Example 2: The first optical transceiver option and the second optical transceiver option supported by the second optical transceiver are optical transceiver options N1b respectively.

[0103] 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.

[0104] Example 4: The first optical transceiver option and the second optical transceiver option supported by the second optical transceiver are optical transceiver options C+b respectively.

[0105] 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.

[0106] When 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. Information indicating that the first optical transceiver option does not match the second optical transceiver option may also be carried in the upstream frame, so that the OLT can determine that the optical transceiver option corresponding to the first optical transceiver of the OLT does not match the optical transceiver option corresponding to the second optical transceiver of the ONU. When 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, speaker, etc. of the ONU, or through the management platform of the ONU. Through this alarm, the operation and maintenance personnel can obtain the event that the first optical transceiver option does not match 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, the bit "1110" in the 40th byte of the Serial_Number_ONU message is used to indicate that the first optical transceiver option does not match the second optical transceiver option. It should be clear that the message type used by the ONU to indicate to the OLT that the first optical transceiver option does not match the second optical transceiver option in this embodiment, as well as the description of the specific bytes and bits included in the message, are all optional examples and are not limited.

[0107] 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.

[0108] Optionally, the ONU obtains the authorization time indicated by the downlink frame and sends the first uplink frame to the OLT. The first uplink frame is used to request registration with the OLT. Optionally, the first uplink frame also carries second indication information, and the second indication information 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 can be understood that the first optical transceiver option matches the second optical transceiver option.

[0109] For a description of the first uplink frame structure, see Figure 5 As shown, Figure 5An example frame structure diagram of an embodiment of an uplink frame provided in 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.

[0110] 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.

[0111] The Serial_Number_ONU message can be seen in Table 7:

[0112] Table 7

[0113]

[0114] As shown in Table 7, the 5th bit or the 6th bit from the high bit to the low 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 can be understood that if the second optical transceiver option of the ONU is N1 or C+, then the value of the second indication information is 0. If the second optical transceiver option of the ONU is N1b or C+b, then the value of the second indication information is 1.

[0115] 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:

[0116] Table 8

[0117]

[0118] The value range of the octet may be modified in the 39th byte in the Serial_Number_ONU message, so that the second optical transceiver option is indicated by the bits in the idle state within the value range of the octet.

[0119] The ONU shown in this embodiment, in order to achieve the purpose of registering with the OLT, the ONU sends the ONU serial number (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. For another example, the SN is carried in the management and maintenance (operations, administration and maintenance, OAM) message, etc. It can 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 a possible implementation method, and the present application does not limit the specific bits and value meanings used to indicate the second optical transceiver option.

[0120] The present embodiment does not limit the number of second optical transceiver options supported by the second optical transceiver. If the number of second optical transceiver options supported by the second optical transceiver is one (e.g., optical transceiver option N1b), then the optical transceiver option currently configured by the second optical transceiver is the second optical transceiver option (e.g., optical transceiver option N1b). The second optical transceiver of the ONU sends an upstream optical signal to the OLT according to the parameters indicated by the currently configured optical transceiver option (e.g., optical transceiver option N1b). If the number of second optical transceiver options supported by the second optical transceiver is multiple (e.g., optical transceiver options N1 and N1b), then the optical transceiver option currently configured by the second optical transceiver is one of the multiple second optical transceiver options (e.g., optical transceiver option N1). The second optical transceiver of the ONU sends an upstream optical signal 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.

[0121] Step 303: The OLT sends a first activation message to the ONU.

[0122] 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 ONUID, or the OLT has not allocated an ONU ID to the ONU corresponding to the SN. Then the OLT allocates an ONU ID to the ONU and creates a mapping relationship between the SN and the ONUID.

[0123] OLT sends a first activation message to ONU, and the first activation message carries activation indication information and the ONU ID, and the activation indication information is used to indicate that OLT successfully allocates ONU ID to the ONU. Specifically, after OLT allocates the ONU ID to ONU, the ONU ID and the activation indication information are sent through the first activation message. The first activation message also includes the SN, and the SN carried in the first activation message is used to indicate that OLT has successfully allocated the ONU ID to the ONU corresponding to the SN. It should be noted that the present application does not limit the first activation message, and optionally, the first activation message may include an Assign ONU ID (AssignONU_ID) message, and / or a collision feedback message (collision_feedbackmessage). Exemplarily, when the first activation message includes the Assign ONU_ID message, the Assign ONU_ID message carries the activation indication information, ONU ID and SN, so that the ONU can receive the Assign ONU_ID message according to the SN, and obtain the corresponding ONU ID allocated by the OLT. 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. Those skilled in the art will appreciate that the description of the activation message type and the fields carried in this embodiment are all optional examples and are not limiting.

[0124] 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 is not described in detail. After the distance measurement is completed, the ONU enters the state O5, and the ONU passes the authentication, that is, the ONU can access the PON interface of the OLT, can be managed by the OLT, and realizes the uplink and downlink data transmission with the OLT. This embodiment takes the successful activation of the ONU as an example. If the ONU authentication fails, 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, then, the OLT does not execute the process such as step 303, so that the OLT will not manage the ONU.

[0125] When the OLT obtains the first optical transceiver option and the second optical transceiver option, the OLT may also determine whether the first optical transceiver option and the second optical transceiver option match, and register the ONU when it is determined that the first optical transceiver option matches the second optical transceiver option. Then, it is ensured 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 sent by the ONU can be successfully received by the OLT, and ensuring the reliability of the upstream optical signal transmission. Optionally, when it is determined that the first optical transceiver option and the second optical transceiver option do not match, the OLT may continue the registration process of the ONU to try to receive the upstream optical signal from the ONU when the first optical transceiver option and the second optical transceiver option do not match. Optionally, when the OLT obtains the first optical transceiver option and the second optical transceiver option, it may not determine whether the first optical transceiver option and the second optical transceiver option match, but directly register the ONU.

[0126] If the optical network is applied to 50G PON, 200G PON and other scenarios, taking 50G PON as an example, the technical difficulty of 50G PON is relatively high. 50G PON defines two independent transceiver options for the same optical link loss level, for example, optical transceiver options N1 and N1b, and optical transceiver options C+ and C+b. It should be clear that the description of optical transceiver options N1, N1b, C+ and C+b shown in this embodiment are all optional examples, and can also be applied to other types and other numbers of optical transceiver options, without specific limitation. Even at the same optical link loss level, different optical transceiver options reflect different optical transceiver performance. By adopting the method shown in this embodiment, during the ONU registration process, the first optical transceiver option of the OLT and the second optical transceiver option of the ONU are negotiated with each other, so that the first optical transceiver option of the ONU can be guaranteed to be in a matching state with the second optical transceiver option, thereby ensuring that the performance of the first optical transceiver matches the performance of the second optical transceiver. For example, when the first optical transceiver option and the second optical transceiver option are in a matching state, the receiving sensitivity of the first optical transceiver (indicated by the first optical transceiver option) can successfully receive the optical power from the second optical transceiver (indicated by the second optical transceiver option). Then, the transmission of the upstream optical signal can effectively ensure the reliability of the transmission of the upstream optical signal. Moreover, based on the negotiation process, the OLT can obtain the second optical transceiver option of the ONU, and the ONU can obtain the first optical transceiver option of the OLT, which is convenient for the operation and maintenance of the optical network.

[0127] Figure 3b This is a flow chart of the steps of the second embodiment of the communication method provided by this application. Figure 3bIn the illustrated embodiment, the optical transceiver options supported by the ONU can be changed according to the instruction of the OLT, and the specific process is as follows:

[0128] Step 311: The OLT sends a downstream frame to the ONU.

[0129] For a description of the execution process of step 311 shown in this embodiment, please refer to Figure 3a As shown in step 301, the details are not repeated here.

[0130] Step 312: The ONU sends a first uplink frame to the OLT, reporting an optical transceiver option corresponding to the second optical transceiver of the ONU.

[0131] In this embodiment, the optical transceiver option corresponding to the second optical transceiver of the ONU is taken as the fifth optical transceiver option. The fifth optical transceiver option is used to indicate the performance of the second optical transceiver. For a specific description of the fifth optical transceiver option shown in this embodiment, please refer to Figure 3a The description of the second optical transceiver option shown is not repeated in detail.

[0132] Optionally, the ONU shown in step 312 can determine whether the fifth optical transceiver option matches the first optical transceiver option. For specific instructions, please refer to step 302, which will not be described in detail. Then, in this example, when 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.

[0133] Alternatively, the ONU may not determine whether the first optical transceiver option matches the fifth optical transceiver option, and directly send a first uplink frame to the OLT to report the optical transceiver option corresponding to the second optical transceiver of the ONU. Optionally, when the uplink frame sent by the ONU shown in step 312 is a Serial_Number_ONU message for a registration request, the OLT will execute step 313.

[0134] Step 313: The OLT sends a first activation message to the ONU.

[0135] For a description of step 313 shown in this embodiment, see Figure 3a The corresponding step is shown in step 303 and will not be described in detail.

[0136] 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.

[0137] For an explanation of the ONU determining that the first optical transceiver option does not match the fifth optical transceiver option shown in this embodiment, see Figure 3aThe description of the mismatch between the corresponding first optical transceiver option and the second optical transceiver option is not described in detail. If the ONU determines that the first optical transceiver option and the fifth optical transceiver option do not match, then the ONU continues to determine whether the fifth optical transceiver option supports change. Among them, the change of the fifth optical transceiver option means that the fifth optical transceiver option supported by the second optical transceiver can be changed. For example, the fifth optical transceiver option is N1. If the fifth optical transceiver option supported by the second optical transceiver can be changed to one of N1b, C+ or C+b, then it means that the fifth optical transceiver option supports the change of the optical transceiver option. The fifth optical transceiver option does not support the change of the optical transceiver option, which means that the fifth optical transceiver option cannot be changed. For example, the fifth optical transceiver option is N1 and cannot be changed.

[0138] 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, then 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, see Figure 3a The corresponding step 302 is shown, and the 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 uplink frame to the OLT to report the optical transceiver option corresponding to the second optical transceiver of the ONU (i.e., the changed second optical transceiver option). For an explanation of the first uplink frame, see Figure 3a The corresponding step is shown in step 302 and will not be described in detail.

[0139] The present embodiment does not limit the number of fifth optical transceiver options supported by the second optical transceiver. If the number of fifth optical transceiver options supported by the second optical transceiver is one, the fifth optical transceiver option does not match the first optical transceiver option and supports change. The optical transceiver option currently configured by the second optical transceiver is the fifth optical transceiver option. When 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 by the second optical transceiver is also changed to the second optical transceiver option. The second optical transceiver of the ONU sends an upstream optical signal to the OLT according to the parameters indicated by the currently configured second optical transceiver option. If the number of the fifth optical transceiver options supported by the second optical transceiver is multiple (for example, optical transceiver options N1 and N1b), 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. Then, the second optical transceiver option may also be multiple, and the optical transceiver option currently configured by the second optical transceiver is one of the multiple second optical transceiver options. The second optical transceiver of the ONU sends 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 shown in step 314 is a Serial_Number_ONU message for a registration request, the OLT executes step 315.

[0140] Step 315: The OLT sends a first activation message to the ONU.

[0141] When the OLT receives the first uplink frame in step 314, it sends a first activation message to the ONU. For details, see Figure 3a The corresponding step is shown in step 303 and will not be described in detail.

[0142] Step 316: When 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.

[0143] If the first optical transceiver option does not match the fifth optical transceiver option, the ONU sends a second upstream frame to the OLT to try to register with the OLT. The second upstream frame reports the optical transceiver option corresponding to the second optical transceiver of the ONU (that is, the fifth optical transceiver option that does not support the change). For instructions on ONU sending the second upstream frame, see Figure 3b The description of sending the first uplink frame shown in the corresponding step 312 is not repeated in detail. Optionally, when the uplink frame sent by the ONU shown in step 306 is a Serial_Number_ONU message for a registration request, the OLT will execute step 317.

[0144] Step 317: The OLT sends a second activation message to the ONU.

[0145] For instructions on step 317, see Figure 3b The description of the first activation message shown in the corresponding 315 is not repeated in detail.

[0146] By adopting 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.

[0147] Figure 6 This is a flowchart of the steps of the third embodiment of the communication method provided in this application. Figure 3a as well as Figure 3b In the embodiment shown, it is taken that OLT and ONU each only support one optical transceiver option. Figure 6 In the illustrated embodiment, the OLT and the ONU each support multiple optical transceiver options.

[0148] Step 601: OLT sends a downstream frame to ONU.

[0149] In order to achieve the purpose of ONU registration to OLT, OLT sends this downstream frame by broadcasting. This downstream frame is used to indicate the authorization time. For details, see Figure 3a The corresponding step 301 is shown, and the details are not repeated here. The downlink frame carries the 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 Figure 3a The corresponding description is not repeated in detail. 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 the optical link loss level N1, and one of the first optical transceiver option and the fourth optical transceiver option is the optical transceiver option N1, and the other is the optical transceiver option N1b. For another example, the first optical transceiver option and the fourth optical transceiver option correspond to the optical link loss level C+, and one of the first optical transceiver option and the fourth optical transceiver option is the optical transceiver option C+, and the other is the optical transceiver option C+b. For the description of the first indication information indicating the fourth optical transceiver option, please refer to Figure 3a The first indication information shown in the corresponding step 301 indicates the description of the first optical transceiver option, and the details are not repeated here.

[0150] Step 602: The ONU sends an uplink frame to the OLT, reporting an optical transceiver option corresponding to the second optical transceiver of the ONU.

[0151] In this embodiment, the ONU supports the second optical transceiver option and the 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, see Figure 3a The description of the content of the optical transceiver options supported by the corresponding second optical transceiver is not repeated in detail. 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 the optical link loss level N1, and one of the second optical transceiver option and the third optical transceiver option is the optical transceiver option N1, and the other is the optical transceiver option N1b. For another example, the second optical transceiver option and the third optical transceiver option correspond to the optical link loss level C+, and one of the second optical transceiver option and the third optical transceiver option is the optical transceiver option C+, and the other is the optical transceiver option C+b.

[0152] Specifically, the ONU obtains the authorization time indicated by the downlink frame, and the ONU 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, and the second indication information is used to indicate the second optical transceiver option and the third optical transceiver option.

[0153] 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 matching two different optical transceiver options, see Figure 3a The corresponding step is shown in step 303 and will not be described in detail.

[0154] 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 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 shown in step 602 is a Serial_Number_ONU message for a registration request, the OLT will execute step 603.

[0155] Step 603: The OLT sends an activation message to the ONU.

[0156] When the OLT receives an uplink frame from the ONU, the OLT allocates an ONU ID to the ONU and creates a mapping relationship between the SN and the ONUID. The OLT sends an activation indication message and the ONU ID to the ONU, and the activation indication message is used to indicate that the OLT successfully allocates the ONU ID to the ONU. The activation message shown in this embodiment is also used to indicate a target optical transceiver option, wherein the target optical transceiver option is one of the second optical transceiver option and the third optical transceiver option. That is, the OLT indicates that the ONU specifically works in the target optical transceiver option by sending an activation message for indicating the target optical transceiver option to the ONU.

[0157] For example, if the first optical transceiver of the OLT shown in this embodiment supports options C+ and C+b, the OLT obtains through the upstream frame that the second optical transceiver of the ONU supports options C+ and C+b. If the OLT determines that the first optical transceiver receives the upstream optical signal based on option C+b, then, in order to ensure the reliability of the upstream optical signal transmission, the OLT hopes that the target optical transceiver option on which the ONU works is also C+b, so as to ensure that the optical transceiver option on which the first optical transceiver works is in a state matching the optical transceiver option on which the second optical transceiver works.

[0158] The activation message shown in this embodiment may be Assign ONU_ID. Assign ONU_ID may be shown in Table 9:

[0159] Table 9

[0160]

[0161] The target bit in the Assign ONU_ID message may be used to indicate the target optical transceiver option. The target bit is the sixth bit from the high bit to the low bit in the 15th byte in 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 at 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 at 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 may be indicated by any type of message, field, and any value.

[0162] Step 604: The ONU configures the second optical transceiver option as a target optical transceiver option.

[0163] In this embodiment, when the ONU receives the activation message, it can obtain the target optical transceiver option. For example, the target optical transceiver option is C+b. Then, the ONU can determine that the OLT wants the ONU to work in the target optical transceiver option C+b, so as to send an upstream optical signal to the OLT based on the target optical transceiver option C+b. To this end, the ONU configures the second optical transceiver option as the target optical transceiver option C+b, so that the ONU can send an upstream optical signal to the OLT based on the parameters indicated by the target optical transceiver option C+b. For the description of the target optical transceiver option C+b, please refer to Table 6, which will not be described in detail.

[0164] By adopting the method shown in this embodiment, the OLT supports multiple optical transceiver options under the same link budget parameter, and the ONU also supports multiple optical transceiver options under the same link budget parameter. The OLT can directly indicate the optical transceiver option that the ONU works on through an activation message, so that the ONU can clearly know which optical transceiver option is specifically used for transmitting the upstream optical signal among the multiple optical transceiver options supported, thereby ensuring the reliability of the upstream optical signal transmission and reducing the efficiency of the optical transceiver option that the OLT configures the first optical transceiver to work on and the optical transceiver option that the ONU configures the second optical transceiver to work on.

[0165] Regarding the above method embodiment, it should be noted that:

[0166] (1) The step numbers of the flowcharts described in the embodiments are only examples of the execution process and do not constitute a limitation on the order of execution of the steps. There is no strict execution order between the steps that have no temporal dependency relationship with each other in the embodiments of the present application. In addition, not all the steps shown in the flowcharts are steps that must be executed, and some steps can be added or deleted based on the actual needs of each flowchart.

[0167] (2) In the various embodiments of the present application, unless otherwise specified or there is a logical conflict, the terms and / or descriptions between the different embodiments are consistent and can be referenced to each other. The technical features in the different embodiments can be combined to form a new embodiment according to their internal logical relationships.

[0168] (3) The above embodiments use some messages and parameters in the PON system in the description, but in the specific implementation, different messages or message names may be used, and the embodiments of the present application do 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), and it should be understood that the embodiments of the present application do not limit the specific form of the devices. For example, devices that can achieve the same function in the future are applicable to the embodiments of the present application.

[0169] (4) In the above-mentioned various method embodiments, the methods and operations implemented by a device (such as an OLT, an ONU) may also be implemented by a component of the device (such as a chip or a circuit), without limitation.

[0170] The above describes in detail the method provided by the embodiment of the present application. The following describes in detail the device and chip system provided by the embodiment of the present application. It should be understood that the description of the device embodiment corresponds to the description of the method embodiment. Therefore, the content not described in detail can be referred to the method embodiment above. For the sake of brevity, it will not be repeated here.

[0171] The above communication method is mainly introduced from the perspective of interaction between OLT and ONU. It can be understood that in order to realize the above functions, OLT and ONU include hardware structures and / or software modules corresponding to executing various functions.

[0172] It is understandable that, in order to implement the functions in the above embodiments, the OLT and the ONU include hardware structures and / or software modules corresponding to the execution of each function. It should be easily appreciated by those skilled in the art that, in combination with the units and method steps of each example described in the embodiments disclosed in this application, the present application can be implemented in the form of hardware or a combination of hardware and computer software. Whether a function is executed in the form of hardware or computer software driving hardware depends on the specific application scenario and design constraints of the technical solution.

[0173] Figure 7 A schematic block diagram of an embodiment of a communication device provided in the present application. Specifically, the communication device 700 includes a sending module 701, a processing module 702 and a receiving module 703. Among them, the sending module 701 can also be referred to as a transmitter, a sending unit, a sending device, etc. The receiving module 703 can also be referred to as a receiver, a receiving unit, a receiving device, etc. The processing module 702 is used to implement the corresponding processing function. The sending module 701 and the receiving module 703 can also be referred to as a communication interface or a communication unit.

[0174] Optionally, the communication device 700 further includes a storage unit, which can be used to store instructions and / or data, and the processing module 702 can read the instructions and / or data in the storage unit to perform corresponding processing control actions.

[0175] For example, the communication device may be Figure 1 The OLT shown may also be a module (such as a chip) applied to the OLT. Figure 2 The main device shown in FIG. 1 may also be a module (such as a chip) applied to the main device. Then, in Figure 3a In the corresponding embodiment, the sending module 701 is used to execute step 301 and step 303. The receiving module 703 is used to execute step 302. Figure 3bIn the corresponding embodiment, the sending module 701 is used to execute step 311, step 313, step 315 and step 317. The receiving module 703 is used to execute step 312, step 314 and step 316. Figure 6 In the corresponding embodiment, the sending module 701 is used to execute step 601 and step 603 , and the receiving module 703 is used to execute step 602 .

[0176] For example, the communication device may be Figure 1 The ONU or ONT shown may also be a module (such as a chip) applied to the ONU or ONT. Figure 2 The slave device shown in the figure may also be a module (such as a chip) applied to the slave device. Figure 3a In the corresponding embodiment, the sending module 701 is used to execute step 302. The receiving module 703 is used to execute steps 301 and 303. Figure 3b In the corresponding embodiment, the sending module 701 is used to execute step 312, step 314, and step 316. The receiving module 703 is used to execute step 311, step 313, step 315, and step 317. Figure 6 In the corresponding embodiment, the receiving module 703 is used for receiving step 601 to receive a downlink frame and for executing step 603 to receive an activation message. The sending module 701 is used for executing step 602. The processing module 702 is used for executing step 604.

[0177] 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.

[0178] Optionally, the communication device 700 may be a device including an OLT, or a component configured in the OLT, such as a chip of the OLT. In this case, the receiving module 703 and the sending 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 sending module 701 may include an output circuit, and the processing module 702 may include a processing circuit.

[0179] Figure 8 This 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 capable of transmitting and receiving. For a description of the optical transceiver 802, see Figure 1Alternatively, the device for implementing the receiving function in the optical transceiver 802 can be regarded as a receiving module, and the device for implementing 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.

[0180] 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 interaction between the communication device 800 and the ONU.

[0181] In another embodiment, the processor 801 is configured to perform other operations or functions of the chip of the ONU. The optical transceiver 802 is used to implement information interaction between the communication device 800 and the OLT.

[0182] 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, 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.

[0183] Optionally, the communication device 800 may include one or more processors 801 and one or more memories 803 .

[0184] Optionally, the memory 803 may be integrated with the processor 801 or provided separately.

[0185] The specific connection medium between the processor 801, the optical transceiver 802 and the memory 803 is not limited in the embodiment of the present application. Figure 8 In the embodiment, the processor 801, the optical transceiver 802 and the memory 803 are connected via a bus 804. Figure 8 The connection between other components is shown by bold lines, and is only for schematic illustration and is not intended to be limiting. The bus can be divided into an address bus, a data bus, a control bus, and the like.

[0186] It should be understood that for ease of representation, Figure 8 Only one thick line is used in the diagram, but this does not mean that there is only one bus or only one type of bus.

[0187] Fig. 9A schematic diagram of an embodiment of a chip system is provided for 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 .

[0188] Among them, the logic circuit 910 can be a processing circuit in the chip system 900. The logic circuit 910 can be coupled to the storage unit and call the instructions in the storage unit so that the chip system 900 can implement the methods and functions of each embodiment of the present application. The input / output interface 920 can 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.

[0189] Optionally, 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.

[0190] Optionally, the input / output interface 920 may include a transceiver circuit, a transceiver, an input-output circuit, or a communication interface.

[0191] 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.

[0192] 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.

[0193] The embodiment of the present application further provides a computer-readable storage medium on which are stored computer instructions for implementing the methods executed by the OLT or ONU in the above-mentioned method embodiments.

[0194] For example, when the computer program is executed by a computer, the computer can implement the method executed by the OLT or ONU in each embodiment of the above method.

[0195] 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.

[0196] The present application also provides a PON system, which includes the ONU and / or OLT in the above embodiments. Figure 1 In another example, the communication system includes Figure 2 Master and / or slave devices as shown.

[0197] 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.

[0198] In the several embodiments provided in the present 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. There may be other division methods in actual implementation, 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.

[0199] 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 devices. 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 a website site, 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 to another website site, computer, server or data center. 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 contains 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 codes, 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.

[0200] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art who is familiar with the present technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims

1. A communication method, characterized in that: The method comprises: The optical network terminal device receives a downlink frame from the optical network central office device, wherein the downlink frame carries first indication information, wherein 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 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, wherein the uplink frame carries the device identification and second indication information of the optical network terminal device, wherein 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, characterized in that 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 also 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 first optical transceiver option matches the second optical transceiver option, which 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 the optical transceiver option N1b, respectively.

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, 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.

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 first optical transceiver option matches the second optical transceiver option, which 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 the optical transceiver option C+b, respectively.

10. The method according to claim 9, characterized in that If the second optical transceiver option is the 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 7.8dBm, the maximum average transmit power mapped by the optical transceiver option C+b is 11.8dBm, and the target parameter mapped by the optical transceiver option C+b is 5.47dBm.

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 second indication information is 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 is a 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 high to low 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 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, 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 in 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, wherein the downlink frame carries first indication information, wherein 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 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, wherein the uplink frame carries the device identification and second indication information of the optical network terminal device, wherein 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 ODNclass field included in the downlink frame is used to carry the first indication information. When the first indication information is a third value, it is used to indicate that the first optical transceiver option is N1. When the first indication information is a fourth value, it is used to indicate that the first optical transceiver option is N1b. When the first indication information is a fifth value, it is used to indicate that the first optical transceiver option is C+. When the ODN class field is a 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, characterized in that The configuration capability burstprofile 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 in 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 in 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, 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, 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, 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 reception and transmission 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 executing the method according to any one of claims 1 to 16, or a module for executing 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 as described in any one of claims 1 to 16, or the method as described in any one of claims 17 to 23.

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

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