Communication method, communication device, and storage medium

Abstract

The present application provides a communication method, a communication device, and a storage medium. The communication method applied to a first communication device comprises: sending a first message to a second communication device (S210), wherein the first message comprises flexible configuration content supported by the first communication device; receiving a second message determined by the second communication device on the basis of the first message (S220), wherein the second message comprises a first communication device identifier and specific configuration content; and configuring the first communication device according to the second message, such that the first communication device operates according to the specific configuration content (S230).

Description

Communication method, communication device and storage medium Technical Field

[0001] The present application relates to the field of communication technology, for example, to communication methods, communication equipment and storage media. Background Art

[0002] For traditional point-to-multipoint (PtMP) passive optical network systems, the modulation method, transmission rate and forward error correction (FEC) code type used in the passive optical network system are all single and cannot be configured, resulting in low network resource utilization, high power consumption and high cost of the entire passive optical network (PON).

[0003] Summary of the Invention

[0004] The embodiments of the present application provide a communication method, a communication device, and a storage medium, which improve the network resource utilization of the PON system and reduce power consumption and overall cost.

[0005] An embodiment of the present application provides a communication method, applied to a first communication device, including:

[0006] Sending a first message to a second communication device; wherein the first message includes flexible configuration content supported by the first communication device; receiving a second message determined by the second communication device based on the first message; wherein the second message includes the first communication device identifier and specific configuration content; configuring the first communication device according to the second message so that the first communication device operates according to the specific configuration content.

[0007] An embodiment of the present application provides a communication method, applied to a second communication device, including:

[0008] Receive a first message sent by each first communication device; wherein the first message includes flexible configuration content supported by the first communication device; determine a corresponding second message based on the first message; wherein the second message includes the first communication device identifier and specific configuration content; send the second message to the first communication device, so that the first communication device receives and configures and operates according to the specific configuration message content.

[0009] An embodiment of the present application provides a first communication device, comprising: a memory, and one or more processors; the memory is configured to store one or more programs; when the one or more programs are executed by the one or more processors, the one or more processors implement the communication method described in any of the above embodiments.

[0010] An embodiment of the present application provides a second communication device, comprising: a memory, and one or more processors; the memory is configured to store one or more programs; when the one or more programs are executed by the one or more processors, the one or more processors implement the communication method described in any of the above embodiments.

[0011] An embodiment of the present application provides a storage medium storing a computer program. When the computer program is executed by a processor, the communication method described in any of the above embodiments is implemented. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] FIG1 is a schematic structural diagram of a PON system provided by the related art;

[0013] FIG2 is a flow chart of a communication method provided in an embodiment of the present application;

[0014] FIG3 is a flow chart of another communication method provided in an embodiment of the present application;

[0015] FIG4 is a structural block diagram of a PON system provided in an embodiment of the present application;

[0016] FIG5 is a schematic diagram of a data frame structure that can be used in the downlink direction provided by the present application;

[0017] FIG6 is a schematic diagram of a first type of downlink data frame structure provided in an embodiment of the present application;

[0018] FIG7 is a schematic diagram of another downlink first-category data frame structure provided in an embodiment of the present application;

[0019] FIG8 is a schematic diagram of a second type of downlink data frame structure provided in an embodiment of the present application;

[0020] FIG9 is a schematic diagram of a third type of downlink data frame structure provided in an embodiment of the present application;

[0021] FIG10 is a schematic diagram of a fourth type of downlink data frame structure provided in an embodiment of the present application;

[0022] FIG11 is a framing flow chart of a downlink FS frame hybrid frame provided in an embodiment of the present application;

[0023] FIG12 is a schematic diagram of a data frame structure that can be used in the uplink direction according to an embodiment of the present application;

[0024] FIG13 is a schematic diagram of a first type of uplink data frame structure provided in an embodiment of the present application;

[0025] FIG14 is a schematic diagram of another uplink first-category data frame structure provided in an embodiment of the present application;

[0026] FIG15 is a flowchart of OLT signal transmission in the downlink direction provided by an embodiment of the present application;

[0027] FIG16 is a flowchart of an ONU signal reception in the downlink direction provided by an embodiment of the present application;

[0028] 17 is a flowchart of an uplink ONU signal transmission according to an embodiment of the present application;

[0029] FIG18 is a flowchart of an OLT signal reception in the downlink direction provided by an embodiment of the present application;

[0030] FIG19 is a schematic diagram of a flexible configuration of the activation and registration phases provided in an embodiment of the present application;

[0031] FIG20 is a schematic diagram of another flexible configuration of the activation and registration phases provided in an embodiment of the present application;

[0032] FIG21 is a schematic diagram of a flexible configuration in a working state provided by an embodiment of the present application;

[0033] FIG22 is a structural block diagram of a communication device provided in an embodiment of the present application;

[0034] FIG23 is a structural block diagram of another communication device provided in an embodiment of the present application;

[0035] Figure 24 is a structural diagram of a communication device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0036] The following describes the embodiments of the present application in conjunction with the accompanying drawings. The following describes the present application in conjunction with the accompanying drawings, and the examples are only used to explain the present application.

[0037] Figure 1 is a schematic diagram of a PON system structure, as provided by related art. Figure 1 (a) illustrates a PtMP PON system, a common architecture for home access networks. Figures 1 (b) and (c) illustrate the uplink and downlink signal transmission within this structure.

[0038] In the downstream direction, as specified by standards such as ITU-T G.9804.2, the optical line terminal (OLT) encapsulates user data into a specific physical frame format. This frame is then sent to the optical distribution network (ODN) via an optical module. After various attenuation and transmission losses, the optical signal transmitted by the OLT becomes extremely weak and is ultimately received by all optical network units (ONUs) connected to the ODN. In a PON system, equivalent delay compensation technology ensures the same transmission delay from each ONU to the OLT. Uplink bandwidth allocation also strictly controls the time slots for each ONU's uplink burst signal transmission, thereby avoiding uplink signal transmission conflicts.

[0039] In addition, both downlink broadcast transmission and uplink burst transmission use forward error correction (FEC) technology to improve the fault tolerance of the optical channel, allowing optical fiber communication using 3-intensity modulation direct detection (IM / DD) to achieve a transmission rate of 50Gbps.

[0040] However, due to the different geographical locations of each ONU, the fiber length, splitter level, and splitting ratio are all different. The same optical signal reaches each ONU with different dispersion penalty, optical power, and jitter. As a result, the quality of the signal transmitted by the OLT received by each ONU varies greatly.

[0041] To meet the service quality requirements of the receiving end, the ITU-T standard defines strict specifications, ensuring that even the longest-distance ONU with the highest optical path loss (OPL) can accurately receive the same service data as the ONU with the lowest OPL. PON systems utilize a fixed downstream rate on a single wavelength, multiple upstream wavelength options, multiple upstream rates, and the same FEC code type for downstream transmission.

[0042] However, according to the central limit theorem and actual engineering measurement data, the number of ONUs in a PON system that are in the worst-case scenario is relatively small. Therefore, setting standards based on the worst-case scenario across the entire network will inevitably lead to a significant waste of overall network resources and a sharp increase in costs. Therefore, rationally optimizing and deploying overall network resources, reducing energy consumption and costs, and maximizing the output-to-investment ratio will become the focus and direction of future PON system research for operators and equipment manufacturers.

[0043] This application also aims to address the problems of low transmission efficiency, high power consumption, and high cost in traditional networks. It discloses a PON system with a PtMP structure, single-wavelength communication, and flexible configuration. The flexibly configurable PON system disclosed in this application can flexibly change the configuration of each ONU based on the channel conditions between the ONU and the OLT and user service needs, including the modulation method, line rate, and FEC code type to improve network transmission quality. For example, changing the line coding to increase the data transmission rate, reducing the overhead of forward error correction coding to increase service data throughput, or enhancing the error correction performance of FEC to improve signal transmission on degraded channels to ensure service quality. By flexibly configuring network equipment (OLT, ONU), operators and users are provided with a network system with higher transmission efficiency and lower overall cost.

[0044] In one embodiment, FIG2 is a flow chart of a communication method provided by an embodiment of the present application. This embodiment can be performed by a first communication device. In this example, the first communication device (also referred to as a first communication node) can be an ONU. As shown in FIG2 , this embodiment includes S210-S230.

[0045] S210: Send a first message to a second communication device.

[0046] The first message includes flexible configuration content supported by the first communication device. In an embodiment, the first communication device may send all flexible configuration content supported by itself to the second communication device at one time, that is, the first message includes all flexible configuration content supported by the first communication device; or the first communication device may send all flexible configuration content supported by itself to the second communication device in batches, that is, the first message includes some flexible configuration content supported by the first communication device. Exemplarily, the first message may be a Physical Layer Operations, Administration and Maintenance (PLOAM) message, or an Optical Network Unit Management and Control Interface (OMCI) message.

[0047] S220: Receive a second message determined by the second communication device according to the first message.

[0048] The second message includes the first communication device identifier and specific configuration content. In this embodiment, after the second communication device receives the flexible configuration content supported by the first communication device, it determines the specific configuration content based on the flexible configuration content supported by the first communication device. The second message also includes the first communication device identifier, which is used to configure the first communication device with its own identifier.

[0049] S230: Configure the first communication device according to the second message, so that the first communication device operates according to the specific configuration content.

[0050] In an embodiment, after receiving the second message, the first communication device performs data transmission according to the specific configuration content in the second message.

[0051] In one embodiment, the first message includes at least one of the following flexibly configurable contents: modulation and demodulation mode; line coding; forward error correction coding and decoding; uplink and downlink wavelength options; uplink and downlink sub-wavelength options; and switching clock frequency. In the uplink direction, the first communication device can use multiple modulation modes and multiple forward error correction codes, and the second communication device can use multiple demodulation modes and multiple forward error correction decoding codes. In the downlink direction, the second communication device can use multiple modulation modes and multiple forward error correction codes, and the first communication device can use multiple demodulation modes and multiple forward error correction decoding codes.

[0052] In one embodiment, the communication method applied to the first communication device further includes:

[0053] Receiving dedicated synchronization data sent by a second communication device so as to receive dedicated configuration content sent by the second communication device; and correspondingly configuring the first communication device according to the second message so that the first communication device operates according to the specific configuration content, includes: configuring the first communication device according to the dedicated configuration content so that the first communication device operates according to the dedicated configuration content. In an embodiment, the first communication device may receive dedicated synchronization data sent by the second communication device so that the first communication device can receive the dedicated configuration content sent by the second communication device, and configure the first communication device according to the dedicated configuration content so that the first communication device operates according to the dedicated configuration content.

[0054] In one embodiment, the communication method applied to the first communication device further includes:

[0055] The universal synchronization data sent by the second communication device is received, so as to receive the specific configuration content sent by the second communication device, where the specific configuration content includes: basic configuration content or dedicated configuration content.

[0056] In one embodiment, the communication method applied to the first communication device further includes:

[0057] Feedback a configuration confirmation message carrying the configuration effective superframe information to the second communication device, so that the second communication device sends downlink data at the effective time based on the configuration effective superframe information; and receive the downlink data sent by the second communication device at the effective time. In an embodiment, the first communication device performs a configuration update based on the specific configuration content issued by the second communication device, and after completing the configuration update, feeds back a configuration confirmation message to the second communication device and informs the second communication device of the configuration effective superframe information, so that the second communication device uses the specific configuration content to send downlink data at the effective time. At the same time, the first communication device also receives data at the corresponding time.

[0058] In one embodiment, the specific configuration content in the second message includes at least one of the following: the modulation and demodulation mode used by the first communication device, the line coding used by the first communication device, the forward error correction decoding code type used by the first communication device in the downlink direction; the forward error correction coding code type used by the first communication device in the uplink direction; the uplink and downlink wavelength or sub-wavelength options used by the first communication device; and the clock frequency switched by the first communication device. In this embodiment, the second communication device can reconfigure one or more flexible configuration contents in the first message. That is, the specific configuration content in the second message may include one or more flexible configuration contents. For example, if the second communication device only reconfigures the line coding used by the first communication device, the second communication device will send the newly configured line coding to the first communication device, while the first communication device will continue to use the previous configuration for other configuration contents.

[0059] In one embodiment, the configuration confirmation message includes at least the type and cause of the configuration failure of the first communication device, and superframe information in which the configuration of the first communication device takes effect. In this embodiment, the configuration confirmation message is an uplink message, and the meaning of specific bits in the configuration confirmation message sent by the first communication device to the second communication device is newly defined. For example, some bits in the configuration confirmation message are used to feedback the type and cause of the configuration failure of the first communication device, and some bits are used to feedback the superframe information in which the configuration of the first communication device takes effect.

[0060] In one embodiment, the communication method applied to the first communication device further includes:

[0061] The optical signal transmitted by the second communication device is identified and segmented based on the optical signal characteristics; optical signals with similar optical signal characteristics are input into the corresponding demodulation module for demodulation. In an embodiment, after the first communication device completes activation and registration, the first communication device can identify and segment the received optical signals based on the optical signal characteristics, and then input optical signals with similar optical signal characteristics into the corresponding demodulation module for demodulation.

[0062] In one embodiment, in the uplink direction, the communication method applied to the first communication device further includes: generating an uplink physical frame and transmitting an optical signal to the second communication device according to the specific transmission configuration content. In the uplink direction, burst mode is used to upload information of the specific first communication device. The first communication device determines the data to be transmitted based on the bandwidth allocated to the second communication device in a dynamic bandwidth assignment (DBA) configuration, and generates a burst of uplink physical frames and transmits an optical signal to the second communication device according to the specific transmission configuration content configured by the second communication device.

[0063] In one embodiment, the specific transmission configuration content includes: basic transmission configuration content or dedicated transmission configuration content; and the basic transmission configuration content and the dedicated transmission configuration content both include at least one of the following: uplink line coding, modulation and demodulation mode, forward error correction coding, uplink rate and transmission wavelength.

[0064] In one embodiment, in the uplink direction, the uplink data frame structure of the first communication node includes at least a first type data frame. In the uplink direction, each first communication device sends a burst signal independently, that is, the uplink direction adopts a frame structure similar to the first type data frame in the downlink direction.

[0065] In one embodiment, the uplink FS frame of the first type of data frame uses the first type of line coding or the second type of line coding, and the first type of line coding and the second type of line coding use the same forward error correction code pattern. In one embodiment, the uplink FS frame of the first type of data frame uses the first type of line coding or the second type of line coding, and the first type of line coding and the second type of line coding use the same forward error correction code pattern.

[0066] In one embodiment, the uplink FS frame of the first-category data frame uses the first-category line coding or the second-category line coding, and the first-category line coding uses the first-category forward error correction code pattern, while the second-category line coding uses the second-category forward error correction code pattern. In another embodiment, the uplink FS frame of the first-category data frame uses the first-category line coding or the second-category line coding, and the first-category line coding and the second-category line coding use different forward error correction code patterns. For example, if the first-category line coding uses the first-category forward error correction code pattern, the second-category line coding uses the second-category forward error correction code pattern; or, if the first-category line coding uses the second-category forward error correction code pattern, the second-category line coding uses the first-category forward error correction code pattern.

[0067] In one embodiment, FIG3 is a flow chart of another communication method provided by an embodiment of the present application. This embodiment can be performed by a second communication device. In this example, the second communication device (also referred to as a second communication node) can be an OLT. As shown in FIG3 , this embodiment includes S310-S330.

[0068] S310: Receive a first message sent by each first communication device.

[0069] The first message includes flexible configuration content supported by the first communication device.

[0070] S320. Determine a corresponding second message according to the first message.

[0071] The second message includes the first communication device identification and specific configuration content.

[0072] S330: Send the second message to the first communication device, so that the first communication device receives the message and performs configuration and operation according to the specific configuration content.

[0073] In an embodiment, the second communication device receives the first message sent by each first communication device, determines the second message corresponding to the first communication device based on the first message, and sends the second message to each corresponding first communication device, so that the first communication device receives and configures and operates according to the specific configuration content.

[0074] In one embodiment, the communication method applied to the second communication device further includes:

[0075] The second communication device is configured accordingly to the configuration content corresponding to the first communication device based on the second message. The configuration content corresponding to the first communication device is configured, and the corresponding configuration content includes at least one of the following flexible configuration contents: modulation and demodulation mode; line coding; forward error correction code; uplink and downlink wavelength options; and uplink and downlink sub-wavelength options. In an embodiment, after the second communication device determines the corresponding second message based on the first message, it responds and configures the configuration content corresponding to the first communication device based on the second message, so that the second communication device can correctly receive information from the first communication device or correctly send information related to the first communication device.

[0076] In one embodiment, the communication method applied to the second communication device further includes:

[0077] Dedicated synchronization data is sent to the first communication device so that the first communication device receives dedicated configuration content and configures the first communication device according to the dedicated configuration content so that the first communication device operates according to the dedicated configuration content.

[0078] In one embodiment, the communication method applied to the second communication device further includes:

[0079] Universal synchronization data is sent to the first communication device so that the first communication device receives specific configuration content; wherein the specific configuration content includes: basic configuration content or dedicated configuration content.

[0080] In one embodiment, the communication method applied to the second communication device further includes:

[0081] Receive a configuration confirmation message carrying configuration effective superframe information fed back by the first communication device; and send downlink data to the first communication device at the effective time according to the configuration effective superframe information.

[0082] In one embodiment, the configuration confirmation message includes at least: the type and reason of the configuration failure of the first communication device, and the superframe information in which the configuration of the first communication device takes effect.

[0083] In one embodiment, in the downlink direction, the communication method applied to the second communication device further includes:

[0084] The service data units of the first communication device are grouped according to the attribute information to obtain a corresponding service data unit set; in the frame structure, attribute indication is performed and a downlink data frame is generated according to the attribute information of each service data unit set; wherein the attribute information includes one of the following: ONU line coding, forward error correction decoding, and synchronization data block required by the ONU.

[0085] In one embodiment, in the uplink direction, the communication method applied to the second communication device further includes:

[0086] A receiver matching the specific transmission configuration of the first communication device is selected based on bandwidth allocation to receive the optical signal; wherein the receiver meets the dedicated receiving configuration requirements matching the specific transmission configuration of the first communication device and receives information transmitted from the first communication device.

[0087] In one embodiment, the specific reception configuration requirements include basic reception configuration requirements or dedicated reception configuration requirements; wherein the basic reception configuration requirements and the dedicated reception configuration requirements each include at least one of the following: line coding, demodulation mode, forward error correction decoding, uplink rate, reception wavelength option, and reception sub-wavelength option.

[0088] In one embodiment, in the downlink direction, the downlink data frame structure of the second communication device includes at least one of the following: a first type of data frame, a second type of data frame, a third type of data frame, and a fourth type of data frame.

[0089] In one embodiment, the downlink FS frame of the first type of data frame adopts the first type of line coding or the second type of line coding, and the first type of line coding and the second type of line coding adopt the same forward error correction code pattern.

[0090] In one embodiment, the downlink FS frame of the first type data frame adopts the first type line coding or the second type line coding, and the first type line coding adopts the first type forward error correction code pattern, and the second type line coding adopts the second type forward error correction code pattern.

[0091] In one embodiment, the downlink FS frame of the second type data frame adopts the first type line coding or the second type line coding, and the first type line coding and the second type line coding adopt the first type forward error correction code pattern and the second type forward error correction code pattern.

[0092] In one embodiment, downlink FS frames of the third and fourth type data frames both use the first and second type line coding, and the third and fourth type line coding both use the first or second type forward error correction code pattern.

[0093] For the explanation of parameters such as the first message, the second message, the specific configuration content, and the cooperation confirmation message in the communication method applied to the second communication device, please refer to the description of the corresponding parameters in the above-mentioned communication method applied to the first communication device, and will not be repeated here.

[0094] Below, some implementation methods are provided to illustrate the communication method provided in the embodiments of the present application. Figure 4 is a structural block diagram of a PON system provided in the embodiments of the present application. In this embodiment, the first communication device is an ONU, the second communication device is an OLT, and the PON system includes N ONUs. As shown in Figure 4, the PON system includes a downstream direction (as shown in Figure (a) in Figure 4) and a downstream direction (as shown in Figure (b) in Figure 4).

[0095] The embodiments of this application can be divided into four parts:

[0096] 1) Uplink and downlink data frame structure; 2) Uplink and downlink signal transmission and reception process; 3) Flexible PON configuration and interaction process; 4) Interaction messages for flexible PON system configuration; As shown in Figure 4, the OLT and ONU devices can be divided into PON-Media Access Control (MAC) and optical modules. The uplink and downlink data frame structure configures the MAC layer in the OLT and ONU devices; the uplink and downlink signal transmission and reception process systematically describes the information transmission and reception process of the entire flexible PON system; the configuration and interaction process of flexible PON explains the method for flexibly configuring the entire PON system. This section also involves the content of the flexibly configurable devices in the entire PON system, such as MAC and optical modules; the interaction messages for flexible PON system configuration provide interaction message examples.

[0097] 1. Uplink and downlink data frame structure

[0098] In home access network (PON) systems, upstream and downstream data frames each have a single data frame structure. For example, in the G.9804.2 Common Transmission Convergence (ComTC) standard, the physical frame with a nominal line rate of 49.7664 Gbit / s uses non-return-to-zero (NRZ) line coding. This is followed by low-density parity check (LDPC) encoding, resulting in a bit stream consisting of 360 LDPC (17280, 14592) codewords with a frame period of 125 µs.

[0099] In the flexible PON system proposed in the embodiments of this application, four different types of downlink data frame structures can be applied. In the downlink direction, not only can each type of data frame structure be applied independently, but two or more types can also be used in combination. Figure 5 is a schematic diagram of a data frame structure that can be used in the downlink direction, as provided in this application. As shown in Figure 5, the embodiments of this application can use four different data frame structures for simultaneous application.

[0100] For examples of the four different types of downlink data frame structures shown in FIG5 , please refer to FIG6 to FIG10 .

[0101] Figure 6 is a schematic diagram of a first-category downlink data frame structure provided by an embodiment of the present application. As shown in Figure 6, the downlink FS frame uses the same line coding scheme, such as 4-pulse amplitude modulation (PAM4), NRZ, or dual polarization-quadrature phase shift keying (DP-QPSK). Furthermore, the same modulation scheme also uses the same FEC coding, with the same coding type and code length, such as LDPC (17280, 14592).

[0102] In the first type of data frame structure, during the FEC encoding process, the downstream physical synchronization block (PSBd) and the first small portion of the FS frame data together constitute the information bits of the first FEC codeword. Assuming the information bit length of this FEC codeword is a fixed value of L bits and the PSBd length is M bits, the first (LM) bits of the FS frame participate in the encoding calculation of the first FEC codeword. At a given downlink rate, the bit length of each physical frame is fixed. However, the length of the FS header and FS payload varies during FS framing, resulting in slightly different lengths for each FS frame. That is, after encoding (S-1) FEC codewords in each FS frame, the number of remaining K bits varies (K≤L). Therefore, the information bits of the last FEC codeword need to be padded with zeros, resulting in a length of (LK) bits.

[0103] Figure 7 is a schematic diagram of another downlink first-category data frame structure provided by an embodiment of the present application. The data frame structure shown in Figure 6 refers to the frame structure of the G.9804.2 standard. G.9804.2 can only use NRZ line coding and LDPC (17280, 14592) FEC coding, but the present embodiment can apply other line coding and other FEC codeword lengths or codeword types.

[0104] As shown in FIG7 , the first type of data frame structure is expanded to provide a schematic diagram of a mixed downlink data frame structure in which PAM4 and NRZ line coding coexist, and each line coding uses a different LDPC FEC codeword length (or FEC codeword type). That is, the first type of data frame structure in the embodiment of the present application can also simultaneously include downlink data frames with different line coding and different FEC codes. FIG8 is a schematic diagram of a second type of data frame structure in the downlink direction provided by an embodiment of the present application. As shown in FIG8 , the second type of data frame structure adopts the same type of line coding (such as PAM4 or NRZ) but uses two or more mixed FEC codes. This type of data frame is used in scenarios where the OLT uses different downlink FEC codes for different ONUs to improve service transmission quality and mix them into frames. For example, some ONUs have low optical path loss and can transmit signals at higher throughput, while other ONUs have high optical path loss and require further improvement in FEC error correction capabilities for communication. In this case, it is necessary to use FEC codewords with different forward error correction performance to encode and mix the downlink data of different ONU types for downlink broadcast.

[0105] FIG9 is a schematic diagram of a third type of data frame structure for the downlink direction provided by an embodiment of the present application, and FIG10 is a schematic diagram of a fourth type of data frame structure for the downlink direction provided by an embodiment of the present application. The first type of data frame structure and the second type of data frame structure both use the same line coding; whereas the third type of data frame structure and the fourth type of data frame structure can simultaneously contain data blocks with different line codings, such as NRZ and PAM4, in the same downlink physical data frame; in these two types of downlink data frame structures, it is necessary to group the SDUs (session data units) of different ONUs during or before FS framing, so that the SDUs of ONUs with the same type of line coding are grouped together to form similar SDUs, and then FS framing is performed; when different SDUs are mixed into FS frames, they need to be distinguishable from each other so that after the OLT uses the same or different FEC code types to encode them separately, as shown in FIG9 and FIG10, each ONU can still receive and decode them normally.

[0106] FIG11 is a framing flow chart of a downlink FS mixed frame provided by an embodiment of the present application. As shown in FIG11 , the third type of data frame structure, the fourth type of data frame structure, and the framing process of the downlink FS mixed frame are shown.

[0107] Since the downlink data requested by each ONU can be considered to arrive randomly at the OLT, compared to traditional methods, to group SDUs for different ONU types, an SDU buffer must be established at the OLT. SDUs from all ONUs with the same FEC must be grouped together based on the FEC code type configured by the OLT for each ONU. The OLT should avoid grouping only a small number of SDUs (to avoid sending idle data for extended periods). If this occurs, the buffer time can be increased or the ONU's FEC configuration can be modified. Furthermore, during the 10Gigabit-PON Encapsulation Mode (XGEM) and FS framing process, the same type of SDUs must be further segmented, marked with segmentation markers, zero-padded, and sorted based on the FEC codeword length of the reference group. This ensures that the OLT consistently encodes SDUs of the same type during FEC encoding and that the ONUs consistently decode them during FEC decoding.

[0108] In the uplink direction, since each ONU sends a burst signal independently, the uplink direction should adopt a frame structure similar to the first-class data frame in the downlink direction. Since the length of each burst is allocated bandwidth by the BWmap of the OLT, the length of the uplink burst signal is related to the ONU traffic volume, and the burst signal length is very flexible. Figure 12 is a schematic diagram of a data frame structure that can be used in the uplink direction provided by an embodiment of the present application. As shown in Figure 12, the corresponding first-class data frame in the uplink direction also needs to introduce the FS burst in the G.9804.2ComTC standard for construction. Figure 13 is a schematic diagram of a first-class data frame structure in the uplink direction provided by an embodiment of the present application, and Figure 14 is a schematic diagram of another first-class data frame structure in the uplink direction provided by an embodiment of the present application. As shown in Figures 13 and 14, two possible examples are shown. The difference between the two is that for different line coding, such as NRZ and PAM4, the same FEC code type and different FEC code types are used for encoding, respectively.

[0109] 2. Uplink and Downlink Signal Transmission and Reception Process

[0110] In a flexible PON system, the upstream and downstream data transmission and reception processes differ from those of a traditional PON system due to the more flexible frame structure. Figure 15 is a flowchart of a downstream OLT signal transmission according to an embodiment of the present application; Figure 16 is a flowchart of a downstream ONU signal reception according to an embodiment of the present application.

[0111] In the downstream direction, the Service Data Unit (SDU) arriving at the OLT is processed according to the ONU's existing configuration. For example, data is cached or grouped according to certain rules, grouping SDUs corresponding to ONUs with the same attributes together. This facilitates subsequent attribute indication in the frame structure and the generation of FS data frames. Attributes include line coding, FEC coding, and transmission rate. The FS data frame passes through the FEC encoding module to form the downstream physical frame structure. The physical frame structure data is then sent to the modulation module for further signal processing. Finally, the laser sends it to the ODN for optical signal transmission.

[0112] At the ONU's receiving end, the signal segmentation module first segments the optical signal based on its characteristics and sends optical signals with similar characteristics to the corresponding demodulation module for demodulation. After demodulation, the decoding module decodes the data according to the frame structure indicated in the downlink physical data frame and performs subsequent information processing. In this example, if the demodulation or decoding process fails, the input data can be discarded and reprocessed with new input data.

[0113] Figure 17 is a flowchart of ONU signal transmission in the upstream direction provided by an embodiment of the present application; Figure 18 is a flowchart of OLT signal reception in the downstream direction provided by an embodiment of the present application.

[0114] In the upstream direction, the ONU's data transmission process is similar to that of the OLT. However, since the upstream transmission is in burst mode, uploading information specific to the ONU, the ONU first determines the data to be sent based on the bandwidth allocated by the OLT in the DBA. It then generates burst uplink physical frames and transmits optical signals according to the specific transmission configuration configured by the OLT. This specific transmission configuration includes at least one of the following: uplink line coding, modulation and demodulation method, FEC coding, uplink rate, transmission wavelength, etc. The burst frame generation process can refer to the operation of G.9804.2 standard NRZ line coding and LDPC (17280, 14592) forward error correction coding, and will not be detailed here. At the OLT's receiving end, the OLT selects a receiver that matches the uplink ONU's specific transmission configuration based on the DBA's bandwidth allocation. The receiver must meet the dedicated receive configuration requirements that match the ONU's specific transmission configuration and can correctly receive the information transmitted by the ONU. The specific receiving configuration requirement includes at least one of the following: line coding, demodulation mode, forward error correction decoding, uplink rate, receiving wavelength option, and receiving sub-wavelength option.

[0115] 3. Flexible PON Configuration and Interaction Process

[0116] For flexible PON systems, configuration can be performed during the activation and registration phase or in real time during normal operation. For configuration and interaction during the activation and registration phase, the following situations are considered separately:

[0117] 1) Each ONU has a basic transceiver state, which supports the most basic line coding, such as NRZ, and can also use the default FEC for encoding and decoding; ONU activation cycle: O1-O9 state.

[0118] 2) Each ONU has only a specific transmit and receive state, and may support different line coding and FEC.

[0119] Figure 19 is a schematic diagram of a flexible configuration for the activation and registration phases provided by an embodiment of the present application; Figure 20 is a schematic diagram of another flexible configuration for the activation and registration phases provided by an embodiment of the present application. For scenario 1), the configuration diagram is shown in Figure 19; for scenario 2), the configuration diagram is shown in Figure 20.

[0120] As shown in FIG19 , during operation, the OLT periodically broadcasts a serial number grant (SN grant), and the broadcast content includes specific configuration content of each ONU. When an ONU accesses the PON system, it enters the O1 initial state and receives the OLT's general synchronization data PSync according to the specific configuration content of the ONU in order to obtain superframe synchronization in the downstream direction; after synchronization, it further obtains other data, such as protocol version, burst profile, etc.; then the ONU enters the O2-3 state and sends the Serial_Number_ONU PLOAM message to the OLT to inform the OLT that a new ONU has accessed the system, as well as the first message containing the ONU's own capabilities, such as the Capability_ONU message; then, the OLT discovers that a new ONU has accessed the system and sends it an Assign_ONU-ID to assign the ONU's ONU-ID. In addition, it will also send a second message (for example, the Burst_Profile PLOAM message) to configure the ONU according to certain criteria. The criteria can be either rules set manually by the local end or the output results of the system's automatic judgment. At this stage, the OLT can also send a Ranging The ONU performs ranging and other operations. After receiving the ONU-ID and configuration information, the ONU can configure itself in various ways, such as modulation mode, line coding, FEC encoding and decoding, and switching clock frequency. In addition, the ONU in the O4 state must send a Registration PLOAM message to the OLT to register. After receiving the ONU's registration message, the OLT can further authenticate and calculate the equivalent time delay (EqD) between the OLT and the ONU based on the Registration_ID. After the calculation is complete, it notifies the ONU by sending a Ranging_Time PLOAM message. Finally, the ONU obtains the EqD, completes the activation and registration process, and enters the O5 working phase. During the transmission phase of its upstream physical frame, it adjusts the start time of its upstream frame based on the EqD.

[0121] As shown in Figure 20, during operation, the OLT periodically broadcasts serial number authorization. Unlike Figure 19, the broadcast content includes dedicated configuration content for multiple types of ONUs so that ONUs with different capabilities can obtain their own dedicated synchronization data and complete superframe synchronization. The ONU categories broadcast are subject to the types of ONUs accessing the operator's overall network. For each ONU accessing the PON system, each uses its own transceiver to receive and transmit signals. The process is similar to Figure 19 (the following operations 1-6 are descriptions of the corresponding parts of Figure 19), namely:

[0122] 1) When an ONU accesses the PON system, it enters the O1 initial state and receives the OLT's dedicated synchronization data PSync according to the ONU's dedicated configuration content in order to obtain superframe synchronization in the downstream direction; after synchronization, it further obtains other data, such as protocol version, burst profile, etc.; 2) Then the ONU enters the O2-3 state and sends the Serial_Number_ONU PLOAM message to the OLT to inform the OLT that a new ONU has accessed the system, as well as a first message containing the ONU's own capabilities, such as the Capability_ONU message; 3) Then, the OLT discovers that a new ONU has accessed the system and sends the Assign_ONU-ID to it to assign the ONU's ONU-ID. In addition, it will also send a second message (for example, the Burst_Profile PLOAM message) to configure the ONU according to certain criteria. The criteria can be either rules set manually by the local end or the output results of the system's automatic judgment. At this stage, the OLT can also send the Ranging grant to measure the distance of the ONU, etc.; 4) After the ONU receives the ONU-ID and configuration information, it can configure itself in various ways, such as modulation mode, line coding, FEC encoding and decoding, switching clock frequency, etc. In addition, the ONU in the O4 state must send a Registration PLOAM message to the OLT to register, etc.; 5) After receiving the registration message from the ONU, the OLT can further authenticate and calculate the equivalent delay EqD between the OLT and the ONU based on the Registration_ID. After the calculation is completed, it notifies the ONU by sending a Ranging_Time PLOAM message; 6) Finally, the ONU obtains the EqD, completes the activation and registration process, enters the O5 working phase, and adjusts the start time of its uplink frame according to the EqD during the transmission phase of its uplink physical frame.

[0123] Figure 21 is a schematic diagram of a flexible configuration in a working state provided by an embodiment of the present application. As shown in Figure 21, for real-time configuration and interaction in a working state.

[0124] 1) First, assume that at the SFC1 superframe, the OLT sends a second message (e.g., a Burst_Profile PLOAM message) to the ONU whose configuration needs to be updated. 2) Then, after receiving the configuration message, the ONU feeds back a configuration confirmation message (or no message), such as an Acknowledgement PLOAM message (Completion code = 0x01, etc.), and waits for the new ONU configuration to be completed. 3) Then, the ONU performs configuration updates based on the new Burst_Profile sent by the OLT, and after completion, feeds back a confirmation message, which can also be fed back via an Acknowledgement PLOAM message, and informs the OLT of the superframe information in which the configuration takes effect. 4) Finally, the OLT feeds back the configuration information based on the superframe information in which the configuration takes effect, such as the superframe number SFC. n , uses the new configuration to send downlink data at the agreed effective time, and the ONU also receives data at the corresponding time.

[0125] It is worth noting that:

[0126] 1) The effective time of the configuration agreement can be reported by the ONU or specified by the OLT, which is not limited in this application.

[0127] 2) The capability information of the ONU has been reported during the activation and registration phases. The capability information can also be reported during the working state of the ONU according to the requirements of the OLT, which is not limited in this application.

[0128] 3) The ONU configuration switching request can be initiated by either the OLT or the ONU, though this application does not specify this. Regardless of whether the request is initiated by the OLT or the ONU, the general process is as follows: First, the OLT obtains the ONU's capability information, which can be obtained during the activation registration phase or while the ONU is operating. Next, the OLT sends configuration information, such as a Burst_Profile PLOAM message. Next, the ONU receives the configuration message and either configures itself or instructs the OLT to change the device configuration, such as the FEC code type. Finally, a time is agreed upon for the configuration to take effect, and the OLT and ONU transmit information using the new configuration.

[0129] 4. Interactive Messages for Flexible PON System Configuration

[0130] The message definitions in the above configuration and interaction processes can be referred to in Tables 1 to 4 respectively.

[0131] Table 1. Uplink Capability_ONU PLOAM message

[0132] As shown in Table 1, this is an example of the newly defined Capability_ONU PLOAM message for the ONU to report its own capabilities. It illustrates the ONU's flexibly configurable modulation method (Modulation), line coding (Line code), and forward error correction coding (FEC) capabilities. Other configurable capabilities can also be further expanded in this message, which is not limited by this application.

[0133] Table 2 Downlink Burst_Profile PLOAM message configuration table

[0134] Table 2 shows an example of a revision to the ITU-T G.9804.2 standard Burst_Profile message. The delimiter length unit indicator (DD) in Octet 7 is moved to the corresponding position in Octet 6 - Burst Profile Control 2. Table 3 redefines each bit in Octet 7 of the original Burst_Profile message: AA specifies the ONU modulation mode; BB specifies the ONU line coding; CC specifies the ONU downstream forward error correction decoding pattern; and DD specifies the ONU upstream forward error correction coding pattern.

[0135] Table 3 Burst_Profile PLOAM message configuration table

[0136] As shown in Table 3, if the ONU has other capabilities that need to be flexibly configured, it can also be further expanded by newly defining the meaning of the Burst_Profile bit, which is not limited in this application.

[0137] Table 4 Uplink Acknowledgement PLOAM message configuration table

[0138] Table 4 defines a new feedback message for the contents of the Burst_Profile message received by the ONU. Similarly, Table 4 is an example of a revision to the ITU-T G.9804.2 standard for Acknowledgement PLOAM. If the ONU needs to provide additional information to the OLT during the flexible configuration process, this information can be further expanded by re-defining the meaning of specific bits in this message; this is not limited by this application.

[0139] For example, in Table 4, Octet 10 will feedback the category and cause of ONU configuration failure; Octet 11-12 will feedback the SFC superframe information in which the ONU configuration takes effect, for example, using the last 16 bits of the 51-bit complete superframe number as the superframe information in which the ONU configuration takes effect as agreed with the OLT.

[0140] In one embodiment, FIG22 is a block diagram of a communication device provided in an embodiment of the present application. This embodiment is applied to a first communication device. As shown in FIG22 , the communication device in this embodiment includes: a sending module 2210, a receiving module 2220, and a configuration module 2230.

[0141] The sending module 2210 is configured to send a first message to the second communication device; wherein the first message includes flexible configuration content supported by the first communication device.

[0142] The receiving module 2220 is configured to receive a second message determined by the second communication device according to the first message; wherein the second message includes the first communication device identifier and specific configuration content.

[0143] The configuration module 2230 is configured to configure the first communication device according to the second message, so that the first communication device operates according to specific configuration content.

[0144] In one embodiment, the first message includes at least one of the following flexibly configurable contents: modulation and demodulation mode; line coding; forward error correction coding; uplink and downlink wavelength options; uplink and downlink sub-wavelength options; and switching clock frequency.

[0145] In one embodiment, the communication apparatus applied to the first communication device further includes:

[0146] The receiving module 2220 is also configured to receive dedicated synchronization data sent by the second communication device so as to receive dedicated configuration content sent by the second communication device; correspondingly, the configuration module is also configured to configure the first communication device according to the dedicated configuration content so that the first communication device works according to the dedicated configuration content.

[0147] In one embodiment, the communication apparatus applied to the first communication device further includes:

[0148] The receiving module 2220 is further configured to receive universal synchronization data sent by the second communication device, so as to receive specific configuration content sent by the second communication device, where the specific configuration content includes basic configuration content or dedicated configuration content.

[0149] In one embodiment, the communication apparatus applied to the first communication device further includes:

[0150] The feedback module is configured to feed back a configuration confirmation message carrying the configuration effective superframe information to the second communication device, so that the second communication device sends downlink data at the effective time based on the configuration effective superframe information; the receiving module is also configured to receive the downlink data sent by the second communication device at the effective time.

[0151] In one embodiment, the specific configuration content in the second message includes at least one of the following: the modulation and demodulation method adopted by the first communication device, the line coding adopted by the first communication device, the forward error correction decoding code type adopted by the first communication device in the downlink direction; the forward error correction coding code type adopted by the first communication device in the uplink direction; the uplink and downlink wavelength or sub-wavelength options adopted by the first communication device; and the clock frequency switched by the first communication device.

[0152] In one embodiment, the configuration confirmation message includes at least: the type and reason of the configuration failure of the first communication device, and the superframe information in which the configuration of the first communication device takes effect.

[0153] In one embodiment, the communication apparatus applied to the first communication device further includes:

[0154] The identification and segmentation module is configured to perform signal identification and segmentation on the optical signal sent by the second communication device according to the optical signal characteristics; the input module is configured to input the optical signal with similar optical signal characteristics into the corresponding demodulation module for demodulation.

[0155] In one embodiment, in the uplink direction, the communication apparatus applied to the first communication device further includes:

[0156] The generating module is configured to generate an uplink physical frame and transmit an optical signal to the second communication device according to the specific transmission configuration content.

[0157] In one embodiment, the specific transmission configuration content includes: basic transmission configuration content or dedicated transmission configuration content; and the basic transmission configuration content and the dedicated transmission configuration content both include at least one of the following: uplink line coding, modulation and demodulation mode, forward error correction coding, uplink rate and transmission wavelength.

[0158] In one embodiment, in the uplink direction, the uplink data frame structure of the first communication node includes at least: a first type of data frame.

[0159] In one embodiment, the uplink FS frame of the first type of data frame adopts the first type of line coding or the second type of line coding, and the first type of line coding and the second type of line coding adopt the same forward error correction code pattern.

[0160] In one embodiment, the uplink FS frame of the first type data frame adopts the first type line coding or the second type line coding, and the first type line coding adopts the first type forward error correction code pattern, and the second type line coding adopts the second type forward error correction code pattern.

[0161] The communication apparatus provided in this embodiment is configured to implement the communication method applied to the first communication device in the embodiment shown in FIG2 . The implementation principle and technical effects of the communication apparatus provided in this embodiment are similar and will not be described in detail here.

[0162] In one embodiment, Figure 23 is a block diagram of another communication device provided by an embodiment of the present application. This embodiment can be performed by a second communication device. In this example, the second communication device (also referred to as a second communication node) can be an OLT. As shown in Figure 23, this embodiment includes a receiving module 2310, a determining module 2320, and a sending module 2330.

[0163] The receiving module 2310 is configured to receive a first message sent by each first communication device; wherein the first message includes flexible configuration content supported by the first communication device.

[0164] The determination module 2320 is configured to determine a corresponding second message according to the first message; wherein the second message includes the first communication device identifier and specific configuration content.

[0165] The sending module 2330 is configured to send the second message to the first communication device, so that the first communication device receives the second message and performs configuration and operation according to the specific configuration content.

[0166] In one embodiment, the communication apparatus applied to the second communication device further includes:

[0167] The configuration module is configured to configure the configuration content of the second communication device corresponding to the first communication device according to the second message; the configuration content of the second communication device corresponding to the first communication device is configured, and the corresponding configuration content includes at least one of the following flexible configuration contents: modulation and demodulation mode; line coding; forward error correction encoding and decoding; uplink and downlink wavelength options; uplink and downlink sub-wavelength options.

[0168] In one embodiment, the communication apparatus applied to the second communication device further includes:

[0169] The sending module 2330 is further configured to send dedicated synchronization data to the first communication device so that the first communication device receives the dedicated configuration content and configures the first communication device according to the dedicated configuration content so that the first communication device works according to the dedicated configuration content.

[0170] In one embodiment, the communication apparatus applied to the second communication device further includes:

[0171] The sending module 2330 is further configured to send universal synchronization data to the first communication device so that the first communication device receives specific configuration content; wherein the specific configuration content includes: basic configuration content or dedicated configuration content.

[0172] In one embodiment, the communication apparatus applied to the second communication device further includes:

[0173] The receiving module 2310 is further configured to receive a configuration confirmation message carrying configuration effective superframe information fed back by the first communication device; the sending module is further configured to send downlink data to the first communication device at the effective time according to the configuration effective superframe information.

[0174] In one embodiment, the configuration confirmation message includes at least: the type and reason of the configuration failure of the first communication device, and the superframe information in which the configuration of the first communication device takes effect.

[0175] In one embodiment, in the downlink direction, the communication apparatus applied to the second communication device further includes:

[0176] A grouping module is configured to group the service data units of the first communication device according to the attribute information to obtain a corresponding service data unit set; a generation module is configured to indicate attributes and generate downlink data frames in the frame structure according to the attribute information of each service data unit set; wherein the attribute information includes one of the following: ONU line coding, forward error correction decoding, and ONU required synchronization data block.

[0177] In one embodiment, in the uplink direction, the communication apparatus applied to the second communication device further includes:

[0178] A selection module is configured to select a receiver that matches the specific transmission configuration content of the first communication device to receive the optical signal based on the bandwidth allocation situation; wherein the receiver meets the dedicated receiving configuration requirements that match the specific transmission configuration content of the first communication device and receives information transmitted from the first communication device.

[0179] In one embodiment, the specific reception configuration requirements include basic reception configuration requirements or dedicated reception configuration requirements; wherein the basic reception configuration requirements and the dedicated reception configuration requirements each include at least one of the following: line coding, demodulation mode, forward error correction decoding, uplink rate, reception wavelength option, and reception sub-wavelength option.

[0180] In one embodiment, in the downlink direction, the downlink data frame structure of the second communication device includes at least one of the following: a first type of data frame, a second type of data frame, a third type of data frame, and a fourth type of data frame.

[0181] In one embodiment, the downlink FS frame of the first type of data frame adopts the first type of line coding or the second type of line coding, and the first type of line coding and the second type of line coding adopt the same forward error correction code pattern.

[0182] In one embodiment, the downlink FS frame of the first type data frame adopts the first type line coding or the second type line coding, and the first type line coding adopts the first type forward error correction code pattern, and the second type line coding adopts the second type forward error correction code pattern.

[0183] In one embodiment, the downlink FS frame of the second type data frame adopts the first type line coding or the second type line coding, and the first type line coding and the second type line coding adopt the first type forward error correction code pattern and the second type forward error correction code pattern.

[0184] In one embodiment, downlink FS frames of the third and fourth type data frames both use the first and second type line coding, and the third and fourth type line coding both use the first or second type forward error correction code pattern.

[0185] The communication apparatus provided in this embodiment is configured to implement the communication method applied to the second communication device in the embodiment shown in FIG3 . The implementation principle and technical effects of the communication apparatus provided in this embodiment are similar and will not be described in detail here.

[0186] In one embodiment, Figure 24 is a schematic diagram of the structure of a communication device provided in an embodiment of the present application. As shown in Figure 24, the device provided in the present application includes: a processor 2410, a memory 2420, and a communication interface 2430. The number of processors 2410 in the device can be one or more, and Figure 24 uses one processor 2410 as an example. The number of memories 2420 in the device can be one or more, and Figure 24 uses one memory 2420 as an example. The processor 2410, memory 2420, and communication interface 2430 of the device can be connected via a bus or other means, and Figure 24 uses a bus connection as an example. In this embodiment, the device can be a first communication device.

[0187] The memory 2420, as a computer-readable storage medium, can be configured to store software programs, computer executable programs, and modules, such as program instructions / modules corresponding to the device of any embodiment of the present application (for example, the sending module 2210, the receiving module 2220, and the configuration module 2230 applied to the communication device of the first communication device). The memory 2420 may include a program storage area and a data storage area, wherein the program storage area may store an operating system and at least one application required for a function; the data storage area may store data created based on the use of the device, etc. In addition, the memory 2420 may include a high-speed random access memory and may also include a non-volatile memory, such as at least one disk storage device, a flash memory device, or other non-volatile solid-state storage device. In some instances, the memory 2420 may further include a memory remotely located relative to the processor 2410, and these remote memories may be connected to the device via a network. Examples of the above-mentioned network include the Internet, an intranet, a local area network, a mobile communication network, and combinations thereof. Among them, the communication interface 2430 is configured to enable communication between the first communication device and the second communication device.

[0188] In the case where the communication device is a first communication device, the device provided above can be configured to execute the communication method applied to the first communication device provided in any of the above embodiments, and have corresponding functions and effects.

[0189] In the case where the communication device is a second communication device, the device provided above can be configured to execute the communication method applied to the second communication device provided in any of the above embodiments, and have corresponding functions and effects.

[0190] An embodiment of the present application also provides a storage medium containing computer-executable instructions, which, when executed by a computer processor, are used to execute a communication method applied to a first communication device, the method comprising: sending a first message to a second communication device; wherein the first message includes flexible configuration content supported by the first communication device; receiving a second message determined by the second communication device based on the first message; wherein the second message includes an identifier of the first communication device and specific configuration content; and configuring the first communication device according to the second message so that the first communication device operates according to the specific configuration content.

[0191] An embodiment of the present application also provides a storage medium containing computer-executable instructions, which, when executed by a computer processor, are used to execute a communication method applied to a second communication device, the method comprising: receiving a first message sent by each first communication device; wherein the first message contains flexible configuration content supported by the first communication device; determining a corresponding second message based on the first message; wherein the second message contains a first communication device identifier and specific configuration content; and sending the second message to the first communication device so that the first communication device receives it and configures and operates according to the specific configuration content.

[0192] It will be appreciated by those skilled in the art that the term user equipment encompasses any suitable type of wireless user equipment, such as a mobile phone, a portable data processing device, a portable web browser or a car-mounted mobile station.

[0193] In general, various embodiments of the present application may be implemented in hardware or dedicated circuits, software, logic, or any combination thereof. For example, some aspects may be implemented in hardware, while other aspects may be implemented in firmware or software that can be executed by a controller, microprocessor, or other computing device, although the present application is not limited thereto.

[0194] Embodiments of the present application may be implemented by executing computer program instructions by a data processor of a mobile device, for example, in a processor entity, or by hardware, or by a combination of software and hardware. The computer program instructions may be assembly instructions, instruction set architecture (ISA) instructions, machine instructions, machine-dependent instructions, microcode, firmware instructions, state setting data, or source code or object code written in any combination of one or more programming languages.

[0195] The block diagram of any logical flow in the drawings of the present application may represent program operations, or may represent interconnected logical circuits, modules and functions, or may represent a combination of program operations and logical circuits, modules and functions. A computer program may be stored on a memory. The memory may be of any type suitable for the local technical environment and may be implemented using any suitable data storage technology, such as a read-only memory (ROM), a random access memory (RAM), an optical storage device and system (a digital versatile disc (DVD) or a compact disk (CD)), etc. Computer-readable media may include non-transient storage media. A data processor may be of any type suitable for the local technical environment, such as a general-purpose computer, a special-purpose computer, a microprocessor, a digital signal processor (DSP), an application-specific integrated circuit (ASIC), a field-programmable gate array (FPGA), and a processor based on a multi-core processor architecture.

Claims

1. A communication method, applied to a first communication device, comprising: Sending a first message to a second communication device; wherein the first message includes flexible configuration content supported by the first communication device; Receiving a second message determined by the second communication device according to the first message; wherein the second message includes an identification of the first communication device and specific configuration content; The first communication device is configured according to the second message so that the first communication device works according to the specific configuration content.

2. The method according to claim 1, wherein: The first message includes at least one of the following flexibly configurable contents: modulation and demodulation mode; line coding; forward error correction coding; uplink and downlink wavelength options; Upstream and downstream sub-wavelength options; switching clock frequency.

3. The method according to claim 1, further comprising: receiving dedicated synchronization data sent by the second communication device, so as to receive dedicated configuration content sent by the second communication device; Configuring the first communication device according to the second message so that the first communication device works according to the specific configuration content includes: The first communication device is configured according to the dedicated configuration content so that the first communication device works according to the dedicated configuration content.

4. The method according to claim 1, further comprising: The universal synchronization data sent by the second communication device is received, so as to receive the specific configuration content sent by the second communication device, where the specific configuration content includes: basic configuration content or dedicated configuration content.

5. The method according to claim 1, further comprising: Feedback a configuration confirmation message carrying the configuration effective superframe information to the second communication device, so that the second communication device sends downlink data at the effective time based on the configuration effective superframe information; Receive downlink data sent by the second communication device at the effectiveness time.

6. The method according to any one of claims 1 to 5, wherein: The specific configuration content in the second message includes at least one of the following: the modulation and demodulation method adopted by the first communication device, the line coding adopted by the first communication device, the forward error correction decoding code type adopted by the first communication device in the downlink direction; the forward error correction encoding code type adopted by the first communication device in the uplink direction; the uplink and downlink wavelength or sub-wavelength options adopted by the first communication device; the clock frequency switched by the first communication device.

7. The method according to claim 5, wherein: The configuration confirmation message includes at least: the type and reason of the configuration failure of the first communication device, and the superframe information in which the configuration of the first communication device takes effect.

8. The method according to claim 1, wherein: In the downlink direction, the method further includes: Performing signal recognition and segmentation on the optical signal sent by the second communication device according to the optical signal characteristics; Optical signals with similar optical signal characteristics are input into the corresponding demodulation module for demodulation.

9. The method according to claim 1, wherein: In the uplink direction, the method further includes: generating an uplink physical frame according to the specific transmission configuration content and transmitting an optical signal to the second communication device.

10. The method according to claim 9, wherein: The specific transmission configuration content includes: basic transmission configuration content or dedicated transmission configuration content; and the basic transmission configuration content and the dedicated transmission configuration content both include at least one of the following: uplink line coding, modulation and demodulation mode, forward error correction coding, uplink rate and transmission wavelength.

11. The method according to claim 1, wherein: In the uplink direction, the uplink data frame structure of the first communication node includes at least: a first type of data frame.

12. The method according to claim 11, wherein: The uplink framing sublayer FS frame of the first type of data frame adopts the first type of line coding or the second type of line coding, and the first type of line coding and the second type of line coding adopt the same forward error correction code type.

13. The method according to claim 11, wherein: The uplink FS frame of the first type of data frame adopts the first type of line coding or the second type of line coding, and the first type of line coding adopts the first type of forward error correction code type, and the second type of line coding adopts the second type of forward error correction code type.

14. A communication method, applied to a second communication device, comprising: Receiving a first message sent by each first communication device; wherein the first message includes flexible configuration content supported by the first communication device; Determine a corresponding second message according to the first message; wherein the second message includes a first communication device identifier and specific configuration content; The second message is sent to the first communication device, so that the first communication device receives the message and performs configuration and operation according to the specific configuration content.

15. The method according to claim 14, further comprising: According to the second message, correspondingly configure the configuration content of the second communication device corresponding to the first communication device; The configuration content of the second communication device corresponding to the first communication device includes at least one of the following flexible configuration contents: modulation and demodulation mode; line coding; forward error correction coding; uplink and downlink wavelength options; uplink and downlink sub-wavelength options.

16. The method according to claim 14, further comprising: Dedicated synchronization data is sent to the first communication device so that the first communication device receives dedicated configuration content and configures the first communication device according to the dedicated configuration content so that the first communication device works according to the dedicated configuration content.

17. The method according to claim 14, further comprising: Universal synchronization data is sent to a first communication device so that the first communication device receives specific configuration content; wherein the specific configuration content includes: basic configuration content or dedicated configuration content.

18. The method according to claim 14, further comprising: Receiving a configuration confirmation message carrying configuration effective superframe information fed back by the first communication device; Send downlink data to the first communication device at the effective time according to the configured effective superframe information.

19. The method according to claim 18, wherein: The configuration confirmation message includes at least: the type and reason of the configuration failure of the first communication device, and the superframe information in which the configuration of the first communication device takes effect.

20. The method according to claim 14, wherein: In the downlink direction, the method further includes: Grouping the service data units of the first communication device according to the attribute information to obtain a corresponding service data unit set; In the frame structure, attribute indication is performed according to the attribute information of each service data unit set and a downlink data frame is generated; The attribute information includes one of the following: optical network unit ONU line coding, forward error correction decoding, and synchronization data blocks required by the ONU.

21. The method according to claim 14, wherein: In the uplink direction, the method further includes: A receiver matching the specific transmission configuration content of the first communication device is selected to receive the optical signal according to the bandwidth allocation; wherein the receiver meets the dedicated receiving configuration requirements matching the specific transmission configuration content of the first communication device and receives information transmitted from the first communication device.

22. The method according to claim 14, wherein: The specific receiving configuration requirements include basic receiving configuration requirements or dedicated receiving configuration requirements; wherein, the basic receiving configuration requirements and the dedicated receiving configuration requirements each include at least one of the following contents: line coding, demodulation mode, forward error correction decoding, uplink rate, receiving wavelength option, and receiving sub-wavelength option.

23. The method according to claim 14, wherein: In the downlink direction, the downlink data frame structure of the second communication device includes at least one of the following: a first type of data frame, a second type of data frame, a third type of data frame and a fourth type of data frame.

24. The method according to claim 23, wherein: The downlink framing sublayer FS frame of the first type of data frame adopts the first type of line coding or the second type of line coding, and the first type of line coding and the second type of line coding adopt the same forward error correction code type.

25. The method according to claim 23, wherein: The downlink FS frame of the first type of data frame adopts the first type of line coding or the second type of line coding, and the first type of line coding adopts the first type of forward error correction code type, and the second type of line coding adopts the second type of forward error correction code type.

26. The method of claim 23, wherein: The downlink FS frame of the second type of data frame adopts the first type of line coding or the second type of line coding, and the first type of line coding and the second type of line coding adopt the first type of forward error correction code pattern and the second type of forward error correction code pattern.

27. The method according to claim 23, wherein: The downlink FS frames of the third type of data frame and the fourth type of data frame both adopt the first type of line coding and the second type of line coding, and the third type of line coding and the fourth type of line coding both adopt the first type of forward error correction code type or the second type of forward error correction code type.

28. A first communication device, comprising: memory, and at least one processor; The memory is configured to store at least one program; When the at least one program is executed by the at least one processor, the at least one processor implements the communication method as described in any one of claims 1 to 13.

29. A second communication device, comprising: memory, and at least one processor; The memory is configured to store at least one program; When the at least one program is executed by the at least one processor, the at least one processor implements the communication method as described in any one of claims 14 to 27.

30. A storage medium storing a computer program, wherein the computer program, when executed by a processor, implements the communication method as described in any one of claims 1 to 13, or implements the communication method as described in any one of claims 14 to 27.

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